diff --git a/ChangeLog.txt b/ChangeLog.txt
index c0f27a3f5..81b5d4932 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -52,6 +52,7 @@
 - Tape app. Show variables in order they were added.
 - Shortcuts manager.
 - Support for custom known measurements.
+- Allow negative values.
 
 # Valentina 0.7.52 September 12, 2022
 - Fix crash when default locale is ru.
diff --git a/src/app/valentina/core/vtooloptionspropertybrowser.cpp b/src/app/valentina/core/vtooloptionspropertybrowser.cpp
index 21814fdde..44e665e13 100644
--- a/src/app/valentina/core/vtooloptionspropertybrowser.cpp
+++ b/src/app/valentina/core/vtooloptionspropertybrowser.cpp
@@ -3114,28 +3114,24 @@ void VToolOptionsPropertyBrowser::ShowOptionsToolSpline(QGraphicsItem *item)
     AddPropertyObjectName(i, tr("Name:"), true);
 
     VFormula angle1(spl.GetStartAngleFormula(), i->getData());
-    angle1.setCheckZero(false);
     angle1.setToolId(i->getId());
     angle1.setPostfix(degreeSymbol);
     angle1.Eval();
     AddPropertyFormula(tr("C1: angle:"), angle1, AttrAngle1);
 
     VFormula length1(spl.GetC1LengthFormula(), i->getData());
-    length1.setCheckZero(false);
     length1.setToolId(i->getId());
     length1.setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits()));
     length1.Eval();
     AddPropertyFormula(tr("C1: length:"), length1, AttrLength1);
 
     VFormula angle2(spl.GetEndAngleFormula(), i->getData());
-    angle2.setCheckZero(false);
     angle2.setToolId(i->getId());
     angle2.setPostfix(degreeSymbol);
     angle2.Eval();
     AddPropertyFormula(tr("C2: angle:"), angle2, AttrAngle2);
 
     VFormula length2(spl.GetC2LengthFormula(), i->getData());
-    length2.setCheckZero(false);
     length2.setToolId(i->getId());
     length2.setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits()));
     length2.Eval();
@@ -3992,7 +3988,6 @@ void VToolOptionsPropertyBrowser::UpdateOptionsToolSpline()
     m_idToProperty[AttrName]->setValue(i->name());
 
     VFormula angle1F(spl.GetStartAngleFormula(), i->getData());
-    angle1F.setCheckZero(false);
     angle1F.setToolId(i->getId());
     angle1F.setPostfix(degreeSymbol);
     angle1F.Eval();
@@ -4001,7 +3996,6 @@ void VToolOptionsPropertyBrowser::UpdateOptionsToolSpline()
     m_idToProperty[AttrAngle1]->setValue(angle1);
 
     VFormula length1F(spl.GetC1LengthFormula(), i->getData());
-    length1F.setCheckZero(false);
     length1F.setToolId(i->getId());
     length1F.setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits()));
     length1F.Eval();
@@ -4010,7 +4004,6 @@ void VToolOptionsPropertyBrowser::UpdateOptionsToolSpline()
     m_idToProperty[AttrLength1]->setValue(length1);
 
     VFormula angle2F(spl.GetEndAngleFormula(), i->getData());
-    angle2F.setCheckZero(false);
     angle2F.setToolId(i->getId());
     angle2F.setPostfix(degreeSymbol);
     angle2F.Eval();
@@ -4019,7 +4012,6 @@ void VToolOptionsPropertyBrowser::UpdateOptionsToolSpline()
     m_idToProperty[AttrAngle2]->setValue(angle2);
 
     VFormula length2F(spl.GetC2LengthFormula(), i->getData());
-    length2F.setCheckZero(false);
     length2F.setToolId(i->getId());
     length2F.setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits()));
     length2F.Eval();
diff --git a/src/libs/vgeometry/vabstractarc.cpp b/src/libs/vgeometry/vabstractarc.cpp
index 361bd4d2d..ac06249b5 100644
--- a/src/libs/vgeometry/vabstractarc.cpp
+++ b/src/libs/vgeometry/vabstractarc.cpp
@@ -214,7 +214,7 @@ auto VAbstractArc::AngleArc() const -> qreal
         const qreal angleDiff = qAbs(GetStartAngle() - GetEndAngle());
         if (VFuzzyComparePossibleNulls(angleDiff, 0) || VFuzzyComparePossibleNulls(angleDiff, 360))
         {
-            return 360;
+            return !d->isAllowEmpty ? 360 : 0;
         }
     }
     QLineF l1(0, 0, 100, 0);
@@ -232,12 +232,39 @@ auto VAbstractArc::AngleArc() const -> qreal
     return ang;
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+auto VAbstractArc::GetPath() const -> QPainterPath
+{
+    QPainterPath path;
+
+    const QVector<QPointF> points = GetPoints();
+    if (points.count() >= 2)
+    {
+        path.addPolygon(QPolygonF(points));
+    }
+    else
+    {
+        QPointF center = GetCenter().toQPointF();
+        QRectF rec = QRectF(center.x(), center.y(), accuracyPointOnLine * 2, accuracyPointOnLine * 2);
+        rec.translate(-rec.center().x(), -rec.center().y());
+        path.addEllipse(rec);
+    }
+
+    return path;
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 void VAbstractArc::SetFlipped(bool value)
 {
     d->isFlipped = value;
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void VAbstractArc::SetAllowEmpty(bool value)
+{
+    d->isAllowEmpty = value;
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 void VAbstractArc::SetFormulaLength(const QString &formula)
 {
diff --git a/src/libs/vgeometry/vabstractarc.h b/src/libs/vgeometry/vabstractarc.h
index 44bdde5c8..445b43165 100644
--- a/src/libs/vgeometry/vabstractarc.h
+++ b/src/libs/vgeometry/vabstractarc.h
@@ -83,8 +83,11 @@ public:
     auto IsFlipped() const -> bool;
     auto AngleArc() const -> qreal;
 
+    auto GetPath() const -> QPainterPath override;
+
 protected:
     void SetFlipped(bool value);
+    void SetAllowEmpty(bool value);
     virtual void FindF2(qreal length) = 0;
     void SetFormulaLength(const QString &formula);
 
diff --git a/src/libs/vgeometry/vabstractarc_p.h b/src/libs/vgeometry/vabstractarc_p.h
index 1992c6c5f..453cb18b8 100644
--- a/src/libs/vgeometry/vabstractarc_p.h
+++ b/src/libs/vgeometry/vabstractarc_p.h
@@ -66,6 +66,8 @@ public:
 
     QString formulaLength{}; // NOLINT(misc-non-private-member-variables-in-classes)
 
+    bool isAllowEmpty{false}; // NOLINT(misc-non-private-member-variables-in-classes)
+
 private:
     Q_DISABLE_ASSIGN_MOVE(VAbstractArcData) // NOLINT
 };
diff --git a/src/libs/vgeometry/vabstractcurve.cpp b/src/libs/vgeometry/vabstractcurve.cpp
index a4604356b..89d1f78ad 100644
--- a/src/libs/vgeometry/vabstractcurve.cpp
+++ b/src/libs/vgeometry/vabstractcurve.cpp
@@ -245,12 +245,33 @@ auto VAbstractCurve::ClosestPoint(QPointF scenePoint) const -> QPointF
         return points.constFirst();
     }
 
+    if (VFuzzyComparePoints(points.constLast(), scenePoint))
+    {
+        return points.constLast();
+    }
+
     QPointF candidatePoint;
     qreal bestDistance = INT_MAX;
     bool found = false;
 
     for (qint32 i = 0; i < points.count() - 1; ++i)
     {
+        qreal length = QLineF(points.at(i), scenePoint).length();
+        if (length < bestDistance)
+        {
+            candidatePoint = points.at(i);
+            bestDistance = length;
+            found = true;
+        }
+
+        length = QLineF(points.at(i + 1), scenePoint).length();
+        if (length < bestDistance)
+        {
+            candidatePoint = points.at(i + 1);
+            bestDistance = length;
+            found = true;
+        }
+
         const QPointF cPoint = VGObject::ClosestPoint(QLineF(points.at(i), points.at(i + 1)), scenePoint);
 
         if (IsPointOnLineSegment(cPoint, points.at(i), points.at(i + 1)))
diff --git a/src/libs/vgeometry/varc.cpp b/src/libs/vgeometry/varc.cpp
index 3ad2bae23..5ccdb7d25 100644
--- a/src/libs/vgeometry/varc.cpp
+++ b/src/libs/vgeometry/varc.cpp
@@ -66,6 +66,7 @@ VArc::VArc(const VPointF &center, qreal radius, const QString &formulaRadius, qr
     d(new VArcData(radius, formulaRadius))
 {
     CreateName();
+    SetFlipped(radius < 0);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -74,6 +75,7 @@ VArc::VArc(const VPointF &center, qreal radius, qreal f1, qreal f2)
     d(new VArcData(radius))
 {
     CreateName();
+    SetFlipped(radius < 0);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -143,7 +145,7 @@ auto VArc::Rotate(const QPointF &originPoint, qreal degrees, const QString &pref
     const qreal f1 = QLineF(static_cast<QPointF>(center), p1).angle();
     const qreal f2 = QLineF(static_cast<QPointF>(center), p2).angle();
 
-    VArc arc(center, GetRadius(), f1, f2);
+    VArc arc(center, d->radius, f1, f2);
     arc.setName(name() + prefix);
 
     if (not GetAliasSuffix().isEmpty())
@@ -169,7 +171,7 @@ auto VArc::Flip(const QLineF &axis, const QString &prefix) const -> VArc
     const qreal f1 = QLineF(static_cast<QPointF>(center), p1).angle();
     const qreal f2 = QLineF(static_cast<QPointF>(center), p2).angle();
 
-    VArc arc(center, GetRadius(), f1, f2);
+    VArc arc(center, d->radius, f1, f2);
     arc.setName(name() + prefix);
 
     if (not GetAliasSuffix().isEmpty())
@@ -195,7 +197,7 @@ auto VArc::Move(qreal length, qreal angle, const QString &prefix) const -> VArc
     const qreal f1 = QLineF(static_cast<QPointF>(center), p1).angle();
     const qreal f2 = QLineF(static_cast<QPointF>(center), p2).angle();
 
-    VArc arc(center, GetRadius(), f1, f2);
+    VArc arc(center, d->radius, f1, f2);
     arc.setName(name() + prefix);
 
     if (not GetAliasSuffix().isEmpty())
@@ -220,7 +222,7 @@ VArc::~VArc() = default;
  */
 auto VArc::GetLength() const -> qreal
 {
-    qreal length = d->radius * qDegreesToRadians(AngleArc());
+    qreal length = qAbs(d->radius) * qDegreesToRadians(AngleArc());
     if (IsFlipped())
     {
         length *= -1;
@@ -236,7 +238,7 @@ auto VArc::GetLength() const -> qreal
  */
 auto VArc::GetP1() const -> QPointF
 {
-    QPointF p1(GetCenter().x() + d->radius, GetCenter().y());
+    QPointF p1(GetCenter().x() + qAbs(d->radius), GetCenter().y());
     QLineF centerP1(static_cast<QPointF>(GetCenter()), p1);
     centerP1.setAngle(GetStartAngle());
     return centerP1.p2();
@@ -249,7 +251,7 @@ auto VArc::GetP1() const -> QPointF
  */
 auto VArc::GetP2() const -> QPointF
 {
-    QPointF p2(GetCenter().x() + d->radius, GetCenter().y());
+    QPointF p2(GetCenter().x() + qAbs(d->radius), GetCenter().y());
     QLineF centerP2(static_cast<QPointF>(GetCenter()), p2);
     centerP2.setAngle(GetEndAngle());
     return centerP2.p2();
@@ -262,7 +264,7 @@ auto VArc::GetP2() const -> QPointF
  */
 auto VArc::GetPoints() const -> QVector<QPointF>
 {
-    if (qFuzzyIsNull(GetRadius()))
+    if (qFuzzyIsNull(d->radius))
     {
         return {GetCenter().toQPointF()};
     }
@@ -305,7 +307,7 @@ auto VArc::GetPoints() const -> QVector<QPointF>
 
     for (int i = 0; i < sectionAngle.size(); ++i)
     {
-        const qreal lDistance = GetRadius() * 4.0 / 3.0 * qTan(qDegreesToRadians(sectionAngle.at(i)) * 0.25);
+        const qreal lDistance = qAbs(d->radius) * 4.0 / 3.0 * qTan(qDegreesToRadians(sectionAngle.at(i)) * 0.25);
 
         const QPointF center = static_cast<QPointF>(GetCenter());
 
@@ -315,7 +317,7 @@ auto VArc::GetPoints() const -> QVector<QPointF>
 
         QLineF lineP4P3(center, pStart);
         lineP4P3.setAngle(lineP4P3.angle() + sectionAngle.at(i));
-        lineP4P3.setLength(GetRadius()); // in case of computing error
+        lineP4P3.setLength(qAbs(d->radius)); // in case of computing error
         lineP4P3 = QLineF(lineP4P3.p2(), center);
         lineP4P3.setAngle(lineP4P3.angle() + 90.0);
         lineP4P3.setLength(lDistance);
@@ -345,20 +347,39 @@ auto VArc::GetPoints() const -> QVector<QPointF>
  */
 auto VArc::CutArc(qreal length, VArc &arc1, VArc &arc2, const QString &pointName) const -> QPointF
 {
-    // Always need return two arcs, so we must correct wrong length.
     const qreal fullLength = GetLength();
 
-    if (qAbs(fullLength) < ToPixel(2, Unit::Mm))
+    if (qFuzzyIsNull(fullLength) || qFuzzyIsNull(d->radius))
     {
-        arc1 = VArc();
-        arc2 = VArc();
+        arc1 = *this;
+        arc2 = *this;
+        return GetCenter().toQPointF();
+    }
 
-        const QString errorMsg = tr("Unable to cut curve '%1'. The curve is too short.").arg(name());
-        VAbstractApplication::VApp()->IsPedantic()
-            ? throw VException(errorMsg)
-            : qWarning() << VAbstractApplication::warningMessageSignature + errorMsg;
+    if (qFuzzyIsNull(length) || qFuzzyIsNull(length + fullLength))
+    {
+        arc1 = VArc(GetCenter(), d->radius, d->formulaRadius, GetStartAngle(), GetFormulaF1(), GetStartAngle(),
+                    GetFormulaF1(), getIdObject(), getMode());
+        arc1.SetApproximationScale(GetApproximationScale());
+        arc1.SetFlipped(IsFlipped());
+        arc1.SetAllowEmpty(true);
 
-        return {};
+        arc2 = *this;
+
+        return GetP1();
+    }
+
+    if (VFuzzyComparePossibleNulls(length, fullLength))
+    {
+        arc1 = *this;
+
+        arc2 = VArc(GetCenter(), d->radius, d->formulaRadius, GetEndAngle(), GetFormulaF2(), GetEndAngle(),
+                    GetFormulaF2(), getIdObject(), getMode());
+        arc2.SetApproximationScale(GetApproximationScale());
+        arc2.SetFlipped(IsFlipped());
+        arc2.SetAllowEmpty(true);
+
+        return GetP2();
     }
 
     QLineF line =
@@ -381,7 +402,7 @@ auto VArc::CutArc(qreal length, const QString &pointName) const -> QPointF
 {
     VArc arc1;
     VArc arc2;
-    return this->CutArc(length, arc1, arc2, pointName);
+    return CutArc(length, arc1, arc2, pointName);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -423,14 +444,14 @@ void VArc::CreateAlias()
 //---------------------------------------------------------------------------------------------------------------------
 void VArc::FindF2(qreal length)
 {
-    SetFlipped(length < 0);
+    SetFlipped(length < 0 || d->radius < 0);
 
-    if (length >= MaxLength())
+    if (qAbs(length) >= qAbs(MaxLength()))
     {
         length = MaxLength();
     }
 
-    qreal arcAngle = qAbs(qRadiansToDegrees(length / d->radius));
+    qreal arcAngle = qAbs(qRadiansToDegrees(qAbs(length) / qAbs(d->radius)));
 
     if (IsFlipped())
     {
@@ -438,7 +459,7 @@ void VArc::FindF2(qreal length)
     }
 
     QLineF startAngle(0, 0, 100, 0);
-    startAngle.setAngle(GetStartAngle() + arcAngle); // We use QLineF just because it is easy way correct angle value
+    startAngle.setAngle(GetStartAngle() + arcAngle); // We use QLineF just because it is easy way to correct angle value
 
     SetFormulaF2(QString::number(startAngle.angle()), startAngle.angle());
 }
@@ -457,9 +478,7 @@ auto VArc::CutPoint(qreal length, qreal fullLength, const QString &pointName) co
         length = fullLength + length;
     }
 
-    const qreal maxLength = fullLength - minLength;
-
-    if (length < minLength)
+    if (length < 0)
     {
         QString errorMsg;
         if (not pointName.isEmpty())
@@ -476,7 +495,7 @@ auto VArc::CutPoint(qreal length, qreal fullLength, const QString &pointName) co
             ? throw VException(errorMsg)
             : qWarning() << VAbstractApplication::warningMessageSignature + errorMsg;
     }
-    else if (length > maxLength)
+    else if (length > fullLength)
     {
         QString errorMsg;
         if (not pointName.isEmpty())
@@ -486,7 +505,6 @@ auto VArc::CutPoint(qreal length, qreal fullLength, const QString &pointName) co
         }
         else
         {
-
             errorMsg = tr("Curve '%1'. Length of a cut segment is too big. Optimize it to maximal value.").arg(name());
         }
         VAbstractApplication::VApp()->IsPedantic()
@@ -494,7 +512,12 @@ auto VArc::CutPoint(qreal length, qreal fullLength, const QString &pointName) co
             : qWarning() << VAbstractApplication::warningMessageSignature + errorMsg;
     }
 
-    length = qBound(minLength, length, maxLength);
+    if (qFuzzyIsNull(d->radius))
+    {
+        return {static_cast<QPointF>(GetCenter()), static_cast<QPointF>(GetCenter())};
+    }
+
+    length = qBound(0.0, length, fullLength);
 
     QLineF line(static_cast<QPointF>(GetCenter()), GetP1());
     line.setAngle(line.angle() + qRadiansToDegrees(length / d->radius));
@@ -509,10 +532,7 @@ auto VArc::CutPointFlipped(qreal length, qreal fullLength, const QString &pointN
         length = fullLength + length;
     }
 
-    const qreal minLengthFlipped = fullLength + minLength;
-    const qreal maxLengthFlipped = -minLength;
-
-    if (length < minLengthFlipped)
+    if (length < fullLength)
     {
         QString errorMsg;
         if (not pointName.isEmpty())
@@ -529,7 +549,7 @@ auto VArc::CutPointFlipped(qreal length, qreal fullLength, const QString &pointN
             ? throw VException(errorMsg)
             : qWarning() << VAbstractApplication::warningMessageSignature + errorMsg;
     }
-    else if (length > maxLengthFlipped)
+    else if (length > 0)
     {
         QString errorMsg;
         if (not pointName.isEmpty())
@@ -546,7 +566,12 @@ auto VArc::CutPointFlipped(qreal length, qreal fullLength, const QString &pointN
             : qWarning() << VAbstractApplication::warningMessageSignature + errorMsg;
     }
 
-    length = qBound(minLengthFlipped, length, maxLengthFlipped);
+    if (qFuzzyIsNull(d->radius))
+    {
+        return {static_cast<QPointF>(GetCenter()), static_cast<QPointF>(GetCenter())};
+    }
+
+    length = qBound(fullLength, length, 0.0);
 
     QLineF line(static_cast<QPointF>(GetCenter()), GetP1());
     line.setAngle(line.angle() - qRadiansToDegrees(qAbs(length) / d->radius));
diff --git a/src/libs/vgeometry/vellipticalarc.cpp b/src/libs/vgeometry/vellipticalarc.cpp
index 91e469342..47676853a 100644
--- a/src/libs/vgeometry/vellipticalarc.cpp
+++ b/src/libs/vgeometry/vellipticalarc.cpp
@@ -226,6 +226,15 @@ auto JoinVectors(const QVector<QPointF> &v1, const QVector<QPointF> &v2) -> QVec
 
     return v;
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+auto IsBoundedIntersection(QLineF::IntersectType type, QPointF p, const QLineF &segment1, const QLineF &segment2)
+    -> bool
+{
+    return type == QLineF::BoundedIntersection ||
+           (type == QLineF::UnboundedIntersection && VGObject::IsPointOnLineSegment(p, segment1.p1(), segment2.p1()) &&
+            VGObject::IsPointOnLineSegment(p, segment2.p1(), segment2.p2()));
+}
 } // namespace
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -255,6 +264,7 @@ VEllipticalArc::VEllipticalArc(const VPointF &center, qreal radius1, qreal radiu
     d(new VEllipticalArcData(radius1, radius2, formulaRadius1, formulaRadius2, rotationAngle, formulaRotationAngle))
 {
     CreateName();
+    SetFlipped(radius1 < 0 || radius2 < 0);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -264,6 +274,7 @@ VEllipticalArc::VEllipticalArc(const VPointF &center, qreal radius1, qreal radiu
     d(new VEllipticalArcData(radius1, radius2, rotationAngle))
 {
     CreateName();
+    SetFlipped(radius1 < 0 || radius2 < 0);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -333,11 +344,11 @@ auto VEllipticalArc::Rotate(QPointF originPoint, qreal degrees, const QString &p
 
     QTransform t = d->m_transform;
     t.translate(originPoint.x(), originPoint.y());
-    t.rotate(IsFlipped() ? degrees : -degrees);
+    t.rotate(-degrees);
     t.translate(-originPoint.x(), -originPoint.y());
 
-    VEllipticalArc elArc(VAbstractArc::GetCenter(), GetRadius1(), GetRadius2(), VAbstractArc::GetStartAngle(),
-                         VAbstractArc::GetEndAngle(), GetRotationAngle());
+    VEllipticalArc elArc(VAbstractArc::GetCenter(), d->radius1, d->radius2, VAbstractArc::GetStartAngle(),
+                         VAbstractArc::GetEndAngle(), d->rotationAngle);
     elArc.setName(name() + prefix);
 
     if (not GetAliasSuffix().isEmpty())
@@ -356,8 +367,8 @@ auto VEllipticalArc::Rotate(QPointF originPoint, qreal degrees, const QString &p
 //---------------------------------------------------------------------------------------------------------------------
 auto VEllipticalArc::Flip(const QLineF &axis, const QString &prefix) const -> VEllipticalArc
 {
-    VEllipticalArc elArc(VAbstractArc::GetCenter(), GetRadius1(), GetRadius2(), VAbstractArc::GetStartAngle(),
-                         VAbstractArc::GetEndAngle(), GetRotationAngle());
+    VEllipticalArc elArc(VAbstractArc::GetCenter(), d->radius1, d->radius2, VAbstractArc::GetStartAngle(),
+                         VAbstractArc::GetEndAngle(), d->rotationAngle);
     elArc.setName(name() + prefix);
 
     if (not GetAliasSuffix().isEmpty())
@@ -385,8 +396,8 @@ auto VEllipticalArc::Move(qreal length, qreal angle, const QString &prefix) cons
     QTransform t = d->m_transform;
     t.translate(position.x(), position.y());
 
-    VEllipticalArc elArc(oldCenter, GetRadius1(), GetRadius2(), VAbstractArc::GetStartAngle(),
-                         VAbstractArc::GetEndAngle(), GetRotationAngle());
+    VEllipticalArc elArc(oldCenter, d->radius1, d->radius2, VAbstractArc::GetStartAngle(), VAbstractArc::GetEndAngle(),
+                         d->rotationAngle);
     elArc.setName(name() + prefix);
 
     if (not GetAliasSuffix().isEmpty())
@@ -416,7 +427,7 @@ auto VEllipticalArc::GetLength() const -> qreal
 
     if (IsFlipped())
     {
-        length = length * -1;
+        length *= -1;
     }
 
     return length;
@@ -473,11 +484,16 @@ auto VEllipticalArc::GetPoints() const -> QVector<QPointF>
 {
     const QPointF center = VAbstractArc::GetCenter().toQPointF();
 
+    if (qFuzzyIsNull(d->radius1) && qFuzzyIsNull(d->radius2))
+    {
+        return {center};
+    }
+
     // Don't work with 0 radius. Always make it bigger than 0.
     Q_RELAXED_CONSTEXPR qreal threshold = ToPixel(0.001, Unit::Mm);
-    qreal radius1 = qMax(d->radius1, threshold);
-    qreal radius2 = qMax(d->radius2, threshold);
-    qreal max = qMax(d->radius1, d->radius2);
+    qreal radius1 = qMax(qAbs(d->radius1), threshold);
+    qreal radius2 = qMax(qAbs(d->radius2), threshold);
+    qreal max = qMax(qAbs(d->radius1), qAbs(d->radius2));
     qreal scale = 1;
 
     if (max > maxRadius)
@@ -499,24 +515,24 @@ auto VEllipticalArc::GetPoints() const -> QVector<QPointF>
         // To avoid this we calculate an arc for scaled radiuses and then scale up to original size.
         t.scale(scale, scale);
     }
-    t.rotate(-GetRotationAngle());
+    t.rotate(-d->rotationAngle);
     t.translate(-center.x(), -center.y());
 
     std::transform(points.begin(), points.end(), points.begin(), [t](const QPointF &point) { return t.map(point); });
 
-    return points;
+    return IsFlipped() ? Reverse(points) : points;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 auto VEllipticalArc::GetStartAngle() const -> qreal
 {
-    return QLineF(GetCenter().toQPointF(), GetP1()).angle() - GetRotationAngle();
+    return QLineF(GetCenter().toQPointF(), GetP1()).angle() - d->rotationAngle;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 auto VEllipticalArc::GetEndAngle() const -> qreal
 {
-    return QLineF(GetCenter().toQPointF(), GetP2()).angle() - GetRotationAngle();
+    return QLineF(GetCenter().toQPointF(), GetP2()).angle() - d->rotationAngle;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -527,96 +543,78 @@ auto VEllipticalArc::GetEndAngle() const -> qreal
  * @param arc2 second arc.
  * @return point cutting
  */
-auto VEllipticalArc::CutArc(const qreal &length, VEllipticalArc &arc1, VEllipticalArc &arc2,
-                            const QString &pointName) const -> QPointF
+auto VEllipticalArc::CutArc(qreal length, VEllipticalArc &arc1, VEllipticalArc &arc2, const QString &pointName) const
+    -> QPointF
 {
-    // Always need return two arcs, so we must correct wrong length.
-    qreal len = 0;
     const qreal fullLength = GetLength();
 
-    if (fullLength <= minLength)
+    if (qFuzzyIsNull(fullLength) || (qFuzzyIsNull(d->radius1) && qFuzzyIsNull(d->radius2)))
     {
-        arc1 = VEllipticalArc();
-        arc2 = VEllipticalArc();
-
-        const QString errorMsg = QObject::tr("Unable to cut curve '%1'. The curve is too short.").arg(name());
-        VAbstractApplication::VApp()->IsPedantic()
-            ? throw VException(errorMsg)
-            : qWarning() << VAbstractApplication::warningMessageSignature + errorMsg;
-
-        return {};
+        arc1 = *this;
+        arc2 = *this;
+        return GetCenter().toQPointF();
     }
 
-    const qreal maxLength = fullLength - minLength;
-
-    if (length < minLength)
+    if (qFuzzyIsNull(length) || qFuzzyIsNull(length + fullLength))
     {
-        len = minLength;
+        arc1 = VEllipticalArc(GetCenter(), d->radius1, d->radius2, d->formulaRadius1, d->formulaRadius2,
+                              GetStartAngle(), GetFormulaF1(), GetStartAngle(), GetFormulaF1(), d->rotationAngle,
+                              GetFormulaRotationAngle(), getIdObject(), getMode());
+        arc1.SetApproximationScale(GetApproximationScale());
+        arc1.SetFlipped(IsFlipped());
+        arc1.SetAllowEmpty(true);
 
-        QString errorMsg;
-        if (not pointName.isEmpty())
-        {
-            errorMsg = QObject::tr("Curve '%1'. Length of a cut segment (%2) is too small. Optimize it to minimal "
-                                   "value.")
-                           .arg(name(), pointName);
-        }
-        else
-        {
-            errorMsg = QObject::tr("Curve '%1'. Length of a cut segment is too small. Optimize it to minimal value.")
-                           .arg(name());
-        }
-        VAbstractApplication::VApp()->IsPedantic()
-            ? throw VException(errorMsg)
-            : qWarning() << VAbstractApplication::warningMessageSignature + errorMsg;
-    }
-    else if (length > maxLength)
-    {
-        len = maxLength;
+        arc2 = *this;
 
-        QString errorMsg;
-        if (not pointName.isEmpty())
-        {
-            errorMsg = QObject::tr("Curve '%1'. Length of a cut segment (%2) is too big. Optimize it to maximal value.")
-                           .arg(name(), pointName);
-        }
-        else
-        {
-            errorMsg = QObject::tr("Curve '%1'. Length of a cut segment is too big. Optimize it to maximal value.")
-                           .arg(name());
-        }
-        VAbstractApplication::VApp()->IsPedantic()
-            ? throw VException(errorMsg)
-            : qWarning() << VAbstractApplication::warningMessageSignature + errorMsg;
+        return GetP1();
     }
-    else
+
+    if (VFuzzyComparePossibleNulls(length, fullLength))
     {
-        len = length;
+        arc1 = *this;
+
+        arc2 = VEllipticalArc(GetCenter(), d->radius1, d->radius2, d->formulaRadius1, d->formulaRadius2, GetEndAngle(),
+                              GetFormulaF2(), GetEndAngle(), GetFormulaF2(), d->rotationAngle,
+                              GetFormulaRotationAngle(), getIdObject(), getMode());
+        arc2.SetApproximationScale(GetApproximationScale());
+        arc2.SetFlipped(IsFlipped());
+        arc2.SetAllowEmpty(true);
+
+        return GetP2();
     }
 
+    qreal len = CorrectCutLength(length, fullLength, pointName);
+
     // the first arc has given length and startAngle just like in the origin arc
     arc1 = VEllipticalArc(len, QString().setNum(length), GetCenter(), d->radius1, d->radius2, d->formulaRadius1,
                           d->formulaRadius2, GetStartAngle(), GetFormulaF1(), d->rotationAngle,
                           GetFormulaRotationAngle(), getIdObject(), getMode());
+    arc1.SetApproximationScale(GetApproximationScale());
+    arc1.SetFlipped(IsFlipped());
+
     // the second arc has startAngle just like endAngle of the first arc
     // and it has endAngle just like endAngle of the origin arc
     arc2 = VEllipticalArc(GetCenter(), d->radius1, d->radius2, d->formulaRadius1, d->formulaRadius2, arc1.GetEndAngle(),
                           arc1.GetFormulaF2(), GetEndAngle(), GetFormulaF2(), d->rotationAngle,
                           GetFormulaRotationAngle(), getIdObject(), getMode());
-    return arc1.GetP1();
+    arc2.SetApproximationScale(GetApproximationScale());
+    arc2.SetFlipped(IsFlipped());
+
+    return arc1.GetP2();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-auto VEllipticalArc::CutArc(const qreal &length, const QString &pointName) const -> QPointF
+auto VEllipticalArc::CutArc(qreal length, const QString &pointName) const -> QPointF
 {
     VEllipticalArc arc1;
     VEllipticalArc arc2;
-    return this->CutArc(length, arc1, arc2, pointName);
+    return CutArc(length, arc1, arc2, pointName);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 void VEllipticalArc::CreateName()
 {
-    QString name = ELARC_ + QStringLiteral("%1").arg(this->GetCenter().name());
+    QString name = ELARC_ + this->GetCenter().name();
     const QString nameStr = QStringLiteral("_%1");
 
     if (getMode() == Draw::Modeling && getIdObject() != NULL_ID)
@@ -653,12 +651,12 @@ void VEllipticalArc::CreateAlias()
 void VEllipticalArc::FindF2(qreal length)
 {
     qreal gap = 180;
-    if (length < 0)
+    if (length < 0 || d->radius1 < 0 || d->radius2 < 0)
     {
         SetFlipped(true);
         gap = -gap;
     }
-    while (length > MaxLength())
+    else if (qAbs(length) > qAbs(MaxLength()))
     {
         length = MaxLength();
     }
@@ -666,7 +664,8 @@ void VEllipticalArc::FindF2(qreal length)
     // We need to calculate the second angle
     // first approximation of angle between start and end angles
 
-    QLineF radius1(GetCenter().x(), GetCenter().y(), GetCenter().x() + d->radius1, GetCenter().y());
+    VPointF center = GetCenter();
+    QLineF radius1(center.x(), center.y(), center.x() + qAbs(d->radius1), center.y());
     radius1.setAngle(GetStartAngle());
     radius1.setAngle(radius1.angle() + gap);
     qreal endAngle = radius1.angle();
@@ -676,16 +675,17 @@ void VEllipticalArc::FindF2(qreal length)
 
     qreal lenBez = GetLength(); // first approximation of length
 
-    const qreal eps = ToPixel(0.001, Unit::Mm);
+    Q_RELAXED_CONSTEXPR qreal eps = ToPixel(0.001, Unit::Mm);
 
     while (qAbs(lenBez - length) > eps)
     {
         gap = gap / 2;
-        if (gap < 0.0001)
+        if (qAbs(gap) < 0.0001)
         {
             break;
         }
-        if (lenBez > length)
+
+        if (qAbs(lenBez) > qAbs(length))
         { // we selected too big end angle
             radius1.setAngle(endAngle - qAbs(gap));
         }
@@ -703,15 +703,21 @@ void VEllipticalArc::FindF2(qreal length)
 //---------------------------------------------------------------------------------------------------------------------
 auto VEllipticalArc::MaxLength() const -> qreal
 {
-    const qreal h = qPow(d->radius1 - d->radius2, 2) / qPow(d->radius1 + d->radius2, 2);
-    const qreal ellipseLength = M_PI * (d->radius1 + d->radius2) * (1 + 3 * h / (10 + qSqrt(4 - 3 * h)));
+    const qreal h = qPow(qAbs(d->radius1) - qAbs(d->radius2), 2) / qPow(qAbs(d->radius1) + qAbs(d->radius2), 2);
+    qreal ellipseLength = M_PI * (qAbs(d->radius1) + qAbs(d->radius2)) * (1 + 3 * h / (10 + qSqrt(4 - 3 * h)));
+
+    if (d->radius1 < 0 || d->radius2 < 0)
+    {
+        ellipseLength *= -1;
+    }
+
     return ellipseLength;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 auto VEllipticalArc::GetP(qreal angle) const -> QPointF
 {
-    if (qFuzzyIsNull(GetRadius1()) && qFuzzyIsNull(GetRadius2()))
+    if (qFuzzyIsNull(d->radius1) && qFuzzyIsNull(d->radius2))
     {
         return GetCenter().toQPointF();
     }
@@ -719,8 +725,8 @@ auto VEllipticalArc::GetP(qreal angle) const -> QPointF
     QLineF line(0, 0, 100, 0);
     line.setAngle(angle);
 
-    const qreal a = not qFuzzyIsNull(GetRadius1()) ? line.p2().x() / GetRadius1() : 0;
-    const qreal b = not qFuzzyIsNull(GetRadius2()) ? line.p2().y() / GetRadius2() : 0;
+    const qreal a = not qFuzzyIsNull(d->radius1) ? line.p2().x() / qAbs(d->radius1) : 0;
+    const qreal b = not qFuzzyIsNull(d->radius2) ? line.p2().y() / qAbs(d->radius2) : 0;
     const qreal k = qSqrt(a * a + b * b);
 
     if (qFuzzyIsNull(k))
@@ -733,7 +739,7 @@ auto VEllipticalArc::GetP(qreal angle) const -> QPointF
     QLineF line2(QPointF(), p);
     SCASSERT(VFuzzyComparePossibleNulls(line2.angle(), line.angle()))
 
-    line2.setAngle(line2.angle() + GetRotationAngle());
+    line2.setAngle(line2.angle() + d->rotationAngle);
     return line2.p2() + VAbstractArc::GetCenter().toQPointF();
 }
 
@@ -746,7 +752,7 @@ auto VEllipticalArc::ArcPoints(QVector<QPointF> points) const -> QVector<QPointF
     }
 
     QPointF center = VAbstractArc::GetCenter().toQPointF();
-    qreal radius = qMax(d->radius1, d->radius2) * 2;
+    qreal radius = qMax(qAbs(d->radius1), qAbs(d->radius2)) * 2;
 
     QLineF start(center.x(), center.y(), center.x() + radius, center.y());
     start.setAngle(VAbstractArc::GetStartAngle());
@@ -754,15 +760,6 @@ auto VEllipticalArc::ArcPoints(QVector<QPointF> points) const -> QVector<QPointF
     QLineF end(center.x(), center.y(), center.x() + radius, center.y());
     end.setAngle(VAbstractArc::GetEndAngle());
 
-    auto IsBoundedIntersection =
-        [](QLineF::IntersectType type, QPointF p, const QLineF &segment1, const QLineF &segment2)
-    {
-        return type == QLineF::BoundedIntersection ||
-               (type == QLineF::UnboundedIntersection &&
-                VGObject::IsPointOnLineSegment(p, segment1.p1(), segment2.p1()) &&
-                VGObject::IsPointOnLineSegment(p, segment2.p1(), segment2.p2()));
-    };
-
     bool begin = true;
 
     if (start.angle() >= end.angle())
@@ -839,6 +836,78 @@ auto VEllipticalArc::ArcPoints(QVector<QPointF> points) const -> QVector<QPointF
     return arc;
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+auto VEllipticalArc::CorrectCutLength(qreal length, qreal fullLength, const QString &pointName) const -> qreal
+{
+    qreal len = length;
+
+    auto TooSmallWarning = [this, pointName]()
+    {
+        QString errorMsg;
+        if (not pointName.isEmpty())
+        {
+            errorMsg = QObject::tr("Curve '%1'. Length of a cut segment (%2) is too small. Optimize it to minimal "
+                                   "value.")
+                           .arg(name(), pointName);
+        }
+        else
+        {
+            errorMsg = QObject::tr("Curve '%1'. Length of a cut segment is too small. Optimize it to minimal value.")
+                           .arg(name());
+        }
+        VAbstractApplication::VApp()->IsPedantic()
+            ? throw VException(errorMsg)
+            : qWarning() << VAbstractApplication::warningMessageSignature + errorMsg;
+    };
+
+    auto TooBigWarning = [this, pointName]()
+    {
+        QString errorMsg;
+        if (not pointName.isEmpty())
+        {
+            errorMsg = QObject::tr("Curve '%1'. Length of a cut segment (%2) is too big. Optimize it to maximal value.")
+                           .arg(name(), pointName);
+        }
+        else
+        {
+            errorMsg = QObject::tr("Curve '%1'. Length of a cut segment is too big. Optimize it to maximal value.")
+                           .arg(name());
+        }
+        VAbstractApplication::VApp()->IsPedantic()
+            ? throw VException(errorMsg)
+            : qWarning() << VAbstractApplication::warningMessageSignature + errorMsg;
+    };
+
+    if (!IsFlipped())
+    {
+        if (length < 0)
+        {
+            len = 0;
+            TooSmallWarning();
+        }
+        else if (length > fullLength)
+        {
+            len = fullLength;
+            TooBigWarning();
+        }
+    }
+    else
+    {
+        if (length < fullLength)
+        {
+            len = fullLength;
+            TooSmallWarning();
+        }
+        else if (length > 0)
+        {
+            len = 0;
+            TooBigWarning();
+        }
+    }
+
+    return len;
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief GetFormulaRadius1 return formula for major radius.
diff --git a/src/libs/vgeometry/vellipticalarc.h b/src/libs/vgeometry/vellipticalarc.h
index f72ba6e13..b00068516 100644
--- a/src/libs/vgeometry/vellipticalarc.h
+++ b/src/libs/vgeometry/vellipticalarc.h
@@ -101,9 +101,8 @@ public:
     auto GetStartAngle() const -> qreal override;
     auto GetEndAngle() const -> qreal override;
 
-    auto CutArc(const qreal &length, VEllipticalArc &arc1, VEllipticalArc &arc2, const QString &pointName) const
-        -> QPointF;
-    auto CutArc(const qreal &length, const QString &pointName) const -> QPointF;
+    auto CutArc(qreal length, VEllipticalArc &arc1, VEllipticalArc &arc2, const QString &pointName) const -> QPointF;
+    auto CutArc(qreal length, const QString &pointName) const -> QPointF;
 
     static auto OptimizeAngle(qreal angle) -> qreal;
 
@@ -118,6 +117,8 @@ private:
     auto MaxLength() const -> qreal;
     auto GetP(qreal angle) const -> QPointF;
     auto ArcPoints(QVector<QPointF> points) const -> QVector<QPointF>;
+
+    auto CorrectCutLength(qreal length, qreal fullLength, const QString &pointName) const -> qreal;
 };
 
 Q_DECLARE_METATYPE(VEllipticalArc)                  // NOLINT
diff --git a/src/libs/vpatterndb/vformula_p.h b/src/libs/vpatterndb/vformula_p.h
index 2021b90af..fc1b765bf 100644
--- a/src/libs/vpatterndb/vformula_p.h
+++ b/src/libs/vpatterndb/vformula_p.h
@@ -53,7 +53,7 @@ public:
 
     QString formula{};                                     // NOLINT(misc-non-private-member-variables-in-classes)
     QString strValue{tr("Error")};                         // NOLINT(misc-non-private-member-variables-in-classes)
-    bool checkZero{true};                                  // NOLINT(misc-non-private-member-variables-in-classes)
+    bool checkZero{false};                                 // NOLINT(misc-non-private-member-variables-in-classes)
     bool checkLessThanZero{false};                         // NOLINT(misc-non-private-member-variables-in-classes)
     const VContainer *data{nullptr};                       // NOLINT(misc-non-private-member-variables-in-classes)
     quint32 toolId{NULL_ID};                               // NOLINT(misc-non-private-member-variables-in-classes)
diff --git a/src/libs/vpatterndb/vpiecenode.cpp b/src/libs/vpatterndb/vpiecenode.cpp
index c316561a3..43c5414d1 100644
--- a/src/libs/vpatterndb/vpiecenode.cpp
+++ b/src/libs/vpatterndb/vpiecenode.cpp
@@ -142,7 +142,6 @@ auto VPieceNode::GetSABefore(const VContainer *data) const -> qreal
     }
 
     VFormula formula(d->m_formulaWidthBefore, data);
-    formula.setCheckZero(false);
     formula.Eval();
 
     if (formula.error())
@@ -175,7 +174,6 @@ auto VPieceNode::GetSABefore(const VContainer *data, Unit unit) const -> qreal
     }
 
     VFormula formula(d->m_formulaWidthBefore, data);
-    formula.setCheckZero(false);
     formula.Eval();
 
     if (formula.error())
@@ -229,7 +227,6 @@ auto VPieceNode::GetSAAfter(const VContainer *data) const -> qreal
     }
 
     VFormula formula(d->m_formulaWidthAfter, data);
-    formula.setCheckZero(false);
     formula.Eval();
 
     if (formula.error())
@@ -263,7 +260,6 @@ auto VPieceNode::GetSAAfter(const VContainer *data, Unit unit) const -> qreal
     }
 
     VFormula formula(d->m_formulaWidthAfter, data);
-    formula.setCheckZero(false);
     formula.Eval();
 
     if (formula.error())
@@ -395,7 +391,6 @@ auto VPieceNode::GetPassmarkWidth(const VContainer *data, Unit unit) const -> qr
     {
         VFormula formula(d->m_formulaPassmarkWidth, data);
         formula.setCheckZero(true);
-        formula.setCheckLessThanZero(false);
         formula.Eval();
 
         if (formula.error())
@@ -428,8 +423,6 @@ auto VPieceNode::GetPassmarkAngle(const VContainer *data) const -> qreal
     if (d->m_manualPassmarkAngle)
     {
         VFormula formula(d->m_formulaPassmarkAngle, data);
-        formula.setCheckZero(false);
-        formula.setCheckLessThanZero(false);
         formula.Eval();
 
         if (formula.error())
diff --git a/src/libs/vtools/dialogs/dialogtoolbox.h b/src/libs/vtools/dialogs/dialogtoolbox.h
index e63e9b5f6..f04f0bf6f 100644
--- a/src/libs/vtools/dialogs/dialogtoolbox.h
+++ b/src/libs/vtools/dialogs/dialogtoolbox.h
@@ -64,7 +64,7 @@ struct FormulaData
     QLabel *labelEditFormula{nullptr};
     QLabel *labelResult{nullptr};
     QString postfix;
-    bool checkZero{true};
+    bool checkZero{false};
     bool checkLessThanZero{false};
 };
 
diff --git a/src/libs/vtools/dialogs/tools/dialogalongline.cpp b/src/libs/vtools/dialogs/tools/dialogalongline.cpp
index 1e3efaea9..1039ffc6f 100644
--- a/src/libs/vtools/dialogs/tools/dialogalongline.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogalongline.cpp
@@ -163,7 +163,6 @@ void DialogAlongLine::EvalFormula()
     formulaData.labelEditFormula = ui->labelEditFormula;
     formulaData.labelResult = ui->labelResultCalculation;
     formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-    formulaData.checkZero = false;
 
     Eval(formulaData, m_flagFormula);
 }
diff --git a/src/libs/vtools/dialogs/tools/dialogarc.cpp b/src/libs/vtools/dialogs/tools/dialogarc.cpp
index 27275ef5d..ba1cc64be 100644
--- a/src/libs/vtools/dialogs/tools/dialogarc.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogarc.cpp
@@ -525,17 +525,7 @@ void DialogArc::EvalRadius()
     formulaData.labelResult = ui->labelResultRadius;
     formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
 
-    const qreal radius = Eval(formulaData, m_flagRadius);
-
-    if (radius < 0)
-    {
-        m_flagRadius = false;
-        ChangeColor(ui->labelEditRadius, errorColor);
-        ui->labelResultRadius->setText(tr("Error"));
-        ui->labelResultRadius->setToolTip(tr("Radius can't be negative"));
-
-        DialogArc::CheckState();
-    }
+    Eval(formulaData, m_flagRadius);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -550,7 +540,6 @@ void DialogArc::EvalF()
     formulaData.labelEditFormula = ui->labelEditF1;
     formulaData.labelResult = ui->labelResultF1;
     formulaData.postfix = degreeSymbol;
-    formulaData.checkZero = false;
 
     m_angleF1 = Eval(formulaData, m_flagF1);
 
diff --git a/src/libs/vtools/dialogs/tools/dialogarcwithlength.cpp b/src/libs/vtools/dialogs/tools/dialogarcwithlength.cpp
index 302dc79cb..af5a09a51 100644
--- a/src/libs/vtools/dialogs/tools/dialogarcwithlength.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogarcwithlength.cpp
@@ -550,7 +550,6 @@ void DialogArcWithLength::EvalF()
     formulaData.labelEditFormula = ui->labelEditF1;
     formulaData.labelResult = ui->labelResultF1;
     formulaData.postfix = degreeSymbol;
-    formulaData.checkZero = false;
 
     Eval(formulaData, m_flagF1);
 }
diff --git a/src/libs/vtools/dialogs/tools/dialogbisector.cpp b/src/libs/vtools/dialogs/tools/dialogbisector.cpp
index 9d12f5aa6..3953a7068 100644
--- a/src/libs/vtools/dialogs/tools/dialogbisector.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogbisector.cpp
@@ -157,7 +157,6 @@ void DialogBisector::EvalFormula()
     formulaData.labelEditFormula = ui->labelEditFormula;
     formulaData.labelResult = ui->labelResultCalculation;
     formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-    formulaData.checkZero = false;
 
     Eval(formulaData, m_flagFormula);
 }
diff --git a/src/libs/vtools/dialogs/tools/dialogcurveintersectaxis.cpp b/src/libs/vtools/dialogs/tools/dialogcurveintersectaxis.cpp
index 9c1ae99b3..c221902d7 100644
--- a/src/libs/vtools/dialogs/tools/dialogcurveintersectaxis.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogcurveintersectaxis.cpp
@@ -309,7 +309,6 @@ void DialogCurveIntersectAxis::EvalAngle()
     formulaData.labelEditFormula = ui->labelEditFormula;
     formulaData.labelResult = ui->labelResultCalculation;
     formulaData.postfix = degreeSymbol;
-    formulaData.checkZero = false;
 
     Eval(formulaData, flagFormula);
 }
diff --git a/src/libs/vtools/dialogs/tools/dialogcutarc.cpp b/src/libs/vtools/dialogs/tools/dialogcutarc.cpp
index 32ef115ad..5ff2968ff 100644
--- a/src/libs/vtools/dialogs/tools/dialogcutarc.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogcutarc.cpp
@@ -125,7 +125,6 @@ void DialogCutArc::EvalFormula()
     formulaData.labelEditFormula = ui->labelEditFormula;
     formulaData.labelResult = ui->labelResultCalculation;
     formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-    formulaData.checkZero = false;
 
     Eval(formulaData, m_flagFormula);
 }
@@ -427,10 +426,9 @@ void DialogCutArc::ShowDialog(bool click)
         const QSharedPointer<VArc> arc = data->GeometricObject<VArc>(getArcId());
         QPointF p = arc->ClosestPoint(scene->getScenePos());
         qreal len = arc->GetLengthByPoint(p);
-        if (len > 0)
-        {
-            SetFormula(QString::number(FromPixel(len, *data->GetPatternUnit())));
-        }
+
+        len = !arc->IsFlipped() ? qBound(0.0, len, arc->GetLength()) : qBound(arc->GetLength(), -len, 0.0);
+        SetFormula(QString::number(FromPixel(len, *data->GetPatternUnit())));
     }
 
     FinishCreating();
diff --git a/src/libs/vtools/dialogs/tools/dialogcutspline.cpp b/src/libs/vtools/dialogs/tools/dialogcutspline.cpp
index 99baabca9..088f04384 100644
--- a/src/libs/vtools/dialogs/tools/dialogcutspline.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogcutspline.cpp
@@ -332,7 +332,6 @@ void DialogCutSpline::EvalFormula()
     formulaData.labelEditFormula = ui->labelEditFormula;
     formulaData.labelResult = ui->labelResultCalculation;
     formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-    formulaData.checkZero = false;
 
     Eval(formulaData, m_flagFormula);
 }
diff --git a/src/libs/vtools/dialogs/tools/dialogcutsplinepath.cpp b/src/libs/vtools/dialogs/tools/dialogcutsplinepath.cpp
index 1727e51fc..71393b90c 100644
--- a/src/libs/vtools/dialogs/tools/dialogcutsplinepath.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogcutsplinepath.cpp
@@ -332,7 +332,6 @@ void DialogCutSplinePath::EvalFormula()
     formulaData.labelEditFormula = ui->labelEditFormula;
     formulaData.labelResult = ui->labelResultCalculation;
     formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-    formulaData.checkZero = false;
 
     Eval(formulaData, m_flagFormula);
 }
diff --git a/src/libs/vtools/dialogs/tools/dialogellipticalarc.cpp b/src/libs/vtools/dialogs/tools/dialogellipticalarc.cpp
index b40cc372f..1a450e1a0 100644
--- a/src/libs/vtools/dialogs/tools/dialogellipticalarc.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogellipticalarc.cpp
@@ -397,7 +397,6 @@ void DialogEllipticalArc::EvalRadiuses()
     formulaData.labelEditFormula = ui->labelEditRadius1;
     formulaData.labelResult = ui->labelResultRadius1;
     formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-    formulaData.checkLessThanZero = true;
 
     Eval(formulaData, m_flagRadius1);
 
@@ -420,7 +419,6 @@ void DialogEllipticalArc::EvalAngles()
     formulaData.labelEditFormula = ui->labelEditF1;
     formulaData.labelResult = ui->labelResultF1;
     formulaData.postfix = degreeSymbol;
-    formulaData.checkZero = false;
 
     m_angleF1 = Eval(formulaData, m_flagF1);
 
diff --git a/src/libs/vtools/dialogs/tools/dialogendline.cpp b/src/libs/vtools/dialogs/tools/dialogendline.cpp
index fd244ba7f..74194d98d 100644
--- a/src/libs/vtools/dialogs/tools/dialogendline.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogendline.cpp
@@ -141,7 +141,6 @@ void DialogEndLine::EvalAngle()
     formulaData.labelEditFormula = ui->labelEditAngle;
     formulaData.labelResult = ui->labelResultCalculationAngle;
     formulaData.postfix = degreeSymbol;
-    formulaData.checkZero = false;
 
     Eval(formulaData, flagError);
 }
@@ -155,7 +154,6 @@ void DialogEndLine::EvalLength()
     formulaData.labelEditFormula = ui->labelEditFormula;
     formulaData.labelResult = ui->labelResultCalculation;
     formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-    formulaData.checkLessThanZero = false;
 
     Eval(formulaData, flagFormula);
 }
diff --git a/src/libs/vtools/dialogs/tools/dialoglineintersectaxis.cpp b/src/libs/vtools/dialogs/tools/dialoglineintersectaxis.cpp
index f87639c40..f39c654e0 100644
--- a/src/libs/vtools/dialogs/tools/dialoglineintersectaxis.cpp
+++ b/src/libs/vtools/dialogs/tools/dialoglineintersectaxis.cpp
@@ -349,7 +349,6 @@ void DialogLineIntersectAxis::EvalAngle()
     formulaData.labelEditFormula = ui->labelEditFormula;
     formulaData.labelResult = ui->labelResultCalculation;
     formulaData.postfix = degreeSymbol;
-    formulaData.checkZero = false;
 
     Eval(formulaData, flagFormula);
 }
@@ -388,7 +387,7 @@ void DialogLineIntersectAxis::PointNameChanged()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogLineIntersectAxis::FXAngle()
 {
-    DialogEditWrongFormula *dialog = new DialogEditWrongFormula(data, toolId, this);
+    auto *dialog = new DialogEditWrongFormula(data, toolId, this);
     dialog->setWindowTitle(tr("Edit angle"));
     dialog->SetFormula(GetAngle());
     dialog->setPostfix(degreeSymbol);
diff --git a/src/libs/vtools/dialogs/tools/dialogmove.cpp b/src/libs/vtools/dialogs/tools/dialogmove.cpp
index ed2cc7042..28daf3d5a 100644
--- a/src/libs/vtools/dialogs/tools/dialogmove.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogmove.cpp
@@ -791,7 +791,6 @@ void DialogMove::EvalAngle()
     formulaData.labelEditFormula = ui->labelEditAngle;
     formulaData.labelResult = ui->labelResultAngle;
     formulaData.postfix = degreeSymbol;
-    formulaData.checkZero = false;
 
     Eval(formulaData, flagAngle);
 
@@ -810,7 +809,6 @@ void DialogMove::EvalRotationAngle()
     formulaData.labelEditFormula = ui->labelEditRotationAngle;
     formulaData.labelResult = ui->labelResultRotationAngle;
     formulaData.postfix = degreeSymbol;
-    formulaData.checkZero = false;
 
     Eval(formulaData, flagRotationAngle);
 
diff --git a/src/libs/vtools/dialogs/tools/dialogrotation.cpp b/src/libs/vtools/dialogs/tools/dialogrotation.cpp
index 14e837e2d..0daf0ce61 100644
--- a/src/libs/vtools/dialogs/tools/dialogrotation.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogrotation.cpp
@@ -663,7 +663,6 @@ void DialogRotation::EvalAngle()
     formulaData.labelEditFormula = ui->labelEditAngle;
     formulaData.labelResult = ui->labelResultAngle;
     formulaData.postfix = degreeSymbol;
-    formulaData.checkZero = false;
 
     Eval(formulaData, flagAngle);
 
diff --git a/src/libs/vtools/dialogs/tools/dialogspline.cpp b/src/libs/vtools/dialogs/tools/dialogspline.cpp
index ffc9d2dcd..629d5d33f 100644
--- a/src/libs/vtools/dialogs/tools/dialogspline.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogspline.cpp
@@ -389,7 +389,6 @@ void DialogSpline::EvalAngle1()
     formulaData.labelEditFormula = ui->labelEditAngle1;
     formulaData.labelResult = ui->labelResultAngle1;
     formulaData.postfix = degreeSymbol;
-    formulaData.checkZero = false;
 
     Eval(formulaData, flagAngle1);
 }
@@ -403,7 +402,6 @@ void DialogSpline::EvalAngle2()
     formulaData.labelEditFormula = ui->labelEditAngle2;
     formulaData.labelResult = ui->labelResultAngle2;
     formulaData.postfix = degreeSymbol;
-    formulaData.checkZero = false;
 
     Eval(formulaData, flagAngle2);
 }
@@ -417,7 +415,6 @@ void DialogSpline::EvalLength1()
     formulaData.labelEditFormula = ui->labelEditLength1;
     formulaData.labelResult = ui->labelResultLength1;
     formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-    formulaData.checkZero = false;
     formulaData.checkLessThanZero = true;
 
     Eval(formulaData, flagLength1);
@@ -432,7 +429,6 @@ void DialogSpline::EvalLength2()
     formulaData.labelEditFormula = ui->labelEditLength2;
     formulaData.labelResult = ui->labelResultLength2;
     formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-    formulaData.checkZero = false;
     formulaData.checkLessThanZero = true;
 
     Eval(formulaData, flagLength2);
diff --git a/src/libs/vtools/dialogs/tools/dialogsplinepath.cpp b/src/libs/vtools/dialogs/tools/dialogsplinepath.cpp
index c4f672e60..58265449c 100644
--- a/src/libs/vtools/dialogs/tools/dialogsplinepath.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogsplinepath.cpp
@@ -574,7 +574,6 @@ void DialogSplinePath::EvalAngle1()
     formulaData.labelEditFormula = ui->labelEditAngle1;
     formulaData.labelResult = ui->labelResultAngle1;
     formulaData.postfix = degreeSymbol;
-    formulaData.checkZero = false;
 
     Eval(formulaData, flagAngle1[row]);
 
@@ -600,7 +599,6 @@ void DialogSplinePath::EvalAngle2()
     formulaData.labelEditFormula = ui->labelEditAngle2;
     formulaData.labelResult = ui->labelResultAngle2;
     formulaData.postfix = degreeSymbol;
-    formulaData.checkZero = false;
 
     Eval(formulaData, flagAngle2[row]);
 
@@ -626,7 +624,6 @@ void DialogSplinePath::EvalLength1()
     formulaData.labelEditFormula = ui->labelEditLength1;
     formulaData.labelResult = ui->labelResultLength1;
     formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-    formulaData.checkZero = false;
     formulaData.checkLessThanZero = true;
 
     Eval(formulaData, flagLength1[row]);
@@ -653,7 +650,6 @@ void DialogSplinePath::EvalLength2()
     formulaData.labelEditFormula = ui->labelEditLength2;
     formulaData.labelResult = ui->labelResultLength2;
     formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-    formulaData.checkZero = false;
     formulaData.checkLessThanZero = true;
 
     Eval(formulaData, flagLength2[row]);
diff --git a/src/libs/vtools/dialogs/tools/piece/dialogpiecepath.cpp b/src/libs/vtools/dialogs/tools/piece/dialogpiecepath.cpp
index 3cbc24672..21bddeb08 100644
--- a/src/libs/vtools/dialogs/tools/piece/dialogpiecepath.cpp
+++ b/src/libs/vtools/dialogs/tools/piece/dialogpiecepath.cpp
@@ -820,7 +820,6 @@ void DialogPiecePath::EvalWidth()
     formulaData.labelEditFormula = ui->labelEditWidth;
     formulaData.labelResult = ui->labelResultWidth;
     formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-    formulaData.checkZero = false;
     formulaData.checkLessThanZero = true;
 
     m_saWidth = Eval(formulaData, m_flagFormula);
@@ -851,7 +850,6 @@ void DialogPiecePath::EvalWidthBefore()
         formulaData.labelEditFormula = ui->labelEditBefore;
         formulaData.labelResult = ui->labelResultBefore;
         formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-        formulaData.checkZero = false;
         formulaData.checkLessThanZero = true;
 
         const QString formula = GetFormulaSAWidthBefore();
@@ -886,7 +884,6 @@ void DialogPiecePath::EvalWidthAfter()
         formulaData.labelEditFormula = ui->labelEditAfter;
         formulaData.labelResult = ui->labelResultAfter;
         formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-        formulaData.checkZero = false;
         formulaData.checkLessThanZero = true;
 
         const QString formula = GetFormulaSAWidthAfter();
@@ -919,7 +916,6 @@ void DialogPiecePath::EvalVisible()
     formulaData.labelEditFormula = ui->labelEditVisible;
     formulaData.labelResult = ui->labelResultVisible;
     formulaData.postfix = QString();
-    formulaData.checkZero = false;
     formulaData.checkLessThanZero = true;
 
     Eval(formulaData, m_flagFormulaVisible);
@@ -970,7 +966,6 @@ void DialogPiecePath::EvalPassmarkWidth()
             formulaData.labelResult = ui->labelResultPassmarkWidth;
             formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
             formulaData.checkZero = true;
-            formulaData.checkLessThanZero = false;
 
             Eval(formulaData, m_flagFormulaPassmarkWidth);
 
@@ -1000,8 +995,6 @@ void DialogPiecePath::EvalPassmarkAngle()
             formulaData.labelEditFormula = ui->labelEditPassmarkAngle;
             formulaData.labelResult = ui->labelResultPassmarkAngle;
             formulaData.postfix = degreeSymbol;
-            formulaData.checkZero = false;
-            formulaData.checkLessThanZero = false;
 
             Eval(formulaData, m_flagFormulaPassmarkAngle);
 
@@ -1078,6 +1071,8 @@ void DialogPiecePath::FXPassmarkLength()
     QScopedPointer<DialogEditWrongFormula> dialog(new DialogEditWrongFormula(data, toolId, this));
     dialog->setWindowTitle(tr("Edit passmark length"));
     dialog->SetFormula(GetFormulaPassmarkLength());
+    dialog->setCheckZero(true);
+    dialog->setCheckLessThanZero(true);
     dialog->setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true));
     if (dialog->exec() == QDialog::Accepted)
     {
@@ -1091,6 +1086,7 @@ void DialogPiecePath::FXPassmarkWidth()
     QScopedPointer<DialogEditWrongFormula> dialog(new DialogEditWrongFormula(data, toolId, this));
     dialog->setWindowTitle(tr("Edit passmark width"));
     dialog->SetFormula(GetFormulaPassmarkWidth());
+    dialog->setCheckZero(true);
     dialog->setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true));
     if (dialog->exec() == QDialog::Accepted)
     {
diff --git a/src/libs/vtools/dialogs/tools/piece/dialogplacelabel.cpp b/src/libs/vtools/dialogs/tools/piece/dialogplacelabel.cpp
index 9934100d7..211a5e948 100644
--- a/src/libs/vtools/dialogs/tools/piece/dialogplacelabel.cpp
+++ b/src/libs/vtools/dialogs/tools/piece/dialogplacelabel.cpp
@@ -370,7 +370,6 @@ void DialogPlaceLabel::EvalAngle()
     formulaData.labelEditFormula = ui->labelEditFormulaAngle;
     formulaData.labelResult = ui->labelResultCalculationAngle;
     formulaData.postfix = degreeSymbol;
-    formulaData.checkZero = false;
 
     Eval(formulaData, m_flagAngle);
 }
@@ -384,7 +383,6 @@ void DialogPlaceLabel::EvalVisible()
     formulaData.labelEditFormula = ui->labelEditVisible;
     formulaData.labelResult = ui->labelResultVisible;
     formulaData.postfix = QString();
-    formulaData.checkZero = false;
     formulaData.checkLessThanZero = true;
 
     Eval(formulaData, m_flagFormulaVisible);
@@ -396,6 +394,7 @@ void DialogPlaceLabel::FXWidth()
     QScopedPointer<DialogEditWrongFormula> dialog(new DialogEditWrongFormula(data, toolId, this));
     dialog->setWindowTitle(tr("Edit rectangle width"));
     dialog->SetFormula(GetWidth());
+    dialog->setCheckLessThanZero(true);
     dialog->setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true));
     if (dialog->exec() == QDialog::Accepted)
     {
@@ -409,6 +408,7 @@ void DialogPlaceLabel::FXHeight()
     QScopedPointer<DialogEditWrongFormula> dialog(new DialogEditWrongFormula(data, toolId, this));
     dialog->setWindowTitle(tr("Edit rectangle width"));
     dialog->SetFormula(GetHeight());
+    dialog->setCheckLessThanZero(true);
     dialog->setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true));
     if (dialog->exec() == QDialog::Accepted)
     {
diff --git a/src/libs/vtools/dialogs/tools/piece/dialogseamallowance.cpp b/src/libs/vtools/dialogs/tools/piece/dialogseamallowance.cpp
index 531efdbb2..31cc99808 100644
--- a/src/libs/vtools/dialogs/tools/piece/dialogseamallowance.cpp
+++ b/src/libs/vtools/dialogs/tools/piece/dialogseamallowance.cpp
@@ -2340,7 +2340,6 @@ void DialogSeamAllowance::EvalWidth()
     formulaData.labelEditFormula = uiTabPaths->labelEditWidth;
     formulaData.labelResult = uiTabPaths->labelResultWidth;
     formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-    formulaData.checkZero = false;
     formulaData.checkLessThanZero = true;
 
     m_saWidth = Eval(formulaData, flagFormula);
@@ -2373,7 +2372,6 @@ void DialogSeamAllowance::EvalWidthBefore()
             formulaData.labelEditFormula = uiTabPaths->labelEditBefore;
             formulaData.labelResult = uiTabPaths->labelResultBefore;
             formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-            formulaData.checkZero = false;
             formulaData.checkLessThanZero = true;
 
             Eval(formulaData, flagFormulaBefore);
@@ -2404,7 +2402,6 @@ void DialogSeamAllowance::EvalWidthAfter()
             formulaData.labelEditFormula = uiTabPaths->labelEditAfter;
             formulaData.labelResult = uiTabPaths->labelResultAfter;
             formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
-            formulaData.checkZero = false;
             formulaData.checkLessThanZero = true;
 
             Eval(formulaData, flagFormulaAfter);
@@ -2465,7 +2462,6 @@ void DialogSeamAllowance::EvalPassmarkWidth()
             formulaData.labelResult = uiTabPassmarks->labelResultPassmarkWidth;
             formulaData.postfix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
             formulaData.checkZero = true;
-            formulaData.checkLessThanZero = false;
 
             Eval(formulaData, flagFormulaPassmarkWidth);
 
@@ -2493,8 +2489,6 @@ void DialogSeamAllowance::EvalPassmarkAngle()
             formulaData.labelEditFormula = uiTabPassmarks->labelEditPassmarkAngle;
             formulaData.labelResult = uiTabPassmarks->labelResultPassmarkAngle;
             formulaData.postfix = degreeSymbol;
-            formulaData.checkZero = false;
-            formulaData.checkLessThanZero = false;
 
             Eval(formulaData, flagFormulaPassmarkAngle);
 
@@ -2557,6 +2551,8 @@ void DialogSeamAllowance::FXPassmarkLength()
     QScopedPointer<DialogEditWrongFormula> dialog(new DialogEditWrongFormula(data, toolId, this));
     dialog->setWindowTitle(tr("Edit passmark length"));
     dialog->SetFormula(GetFormulaFromUser(uiTabPassmarks->plainTextEditPassmarkLength));
+    dialog->setCheckLessThanZero(true);
+    dialog->setCheckZero(true);
     dialog->setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true));
     if (dialog->exec() == QDialog::Accepted)
     {
@@ -2570,6 +2566,7 @@ void DialogSeamAllowance::FXPassmarkWidth()
     QScopedPointer<DialogEditWrongFormula> dialog(new DialogEditWrongFormula(data, toolId, this));
     dialog->setWindowTitle(tr("Edit passmark width"));
     dialog->SetFormula(GetFormulaFromUser(uiTabPassmarks->plainTextEditPassmarkWidth));
+    dialog->setCheckZero(true);
     dialog->setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true));
     if (dialog->exec() == QDialog::Accepted)
     {
diff --git a/src/libs/vtools/tools/drawTools/operation/vtoolmove.cpp b/src/libs/vtools/tools/drawTools/operation/vtoolmove.cpp
index 7376562b1..eac0771e9 100644
--- a/src/libs/vtools/tools/drawTools/operation/vtoolmove.cpp
+++ b/src/libs/vtools/tools/drawTools/operation/vtoolmove.cpp
@@ -344,7 +344,6 @@ auto VToolMove::Create(VToolMoveInitData &initData) -> VToolMove *
 auto VToolMove::GetFormulaAngle() const -> VFormula
 {
     VFormula fAngle(formulaAngle, getData());
-    fAngle.setCheckZero(false);
     fAngle.setToolId(m_id);
     fAngle.setPostfix(degreeSymbol);
     fAngle.Eval();
@@ -367,7 +366,6 @@ void VToolMove::SetFormulaAngle(const VFormula &value)
 auto VToolMove::GetFormulaRotationAngle() const -> VFormula
 {
     VFormula fAngle(formulaRotationAngle, getData());
-    fAngle.setCheckZero(false);
     fAngle.setToolId(m_id);
     fAngle.setPostfix(degreeSymbol);
     fAngle.Eval();
@@ -390,7 +388,6 @@ void VToolMove::SetFormulaRotationAngle(const VFormula &value)
 auto VToolMove::GetFormulaLength() const -> VFormula
 {
     VFormula fLength(formulaLength, getData());
-    fLength.setCheckZero(true);
     fLength.setToolId(m_id);
     fLength.setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits()));
     fLength.Eval();
diff --git a/src/libs/vtools/tools/drawTools/operation/vtoolrotation.cpp b/src/libs/vtools/tools/drawTools/operation/vtoolrotation.cpp
index 2235966a4..ab9206d4e 100644
--- a/src/libs/vtools/tools/drawTools/operation/vtoolrotation.cpp
+++ b/src/libs/vtools/tools/drawTools/operation/vtoolrotation.cpp
@@ -286,7 +286,6 @@ auto VToolRotation::OriginPointName() const -> QString
 auto VToolRotation::GetFormulaAngle() const -> VFormula
 {
     VFormula fAngle(formulaAngle, getData());
-    fAngle.setCheckZero(false);
     fAngle.setToolId(m_id);
     fAngle.setPostfix(degreeSymbol);
     fAngle.Eval();
diff --git a/src/libs/vtools/tools/drawTools/toolcurve/vtoolarc.cpp b/src/libs/vtools/tools/drawTools/toolcurve/vtoolarc.cpp
index dc908a462..172da27f8 100644
--- a/src/libs/vtools/tools/drawTools/toolcurve/vtoolarc.cpp
+++ b/src/libs/vtools/tools/drawTools/toolcurve/vtoolarc.cpp
@@ -208,13 +208,10 @@ void VToolArc::SetFormulaRadius(const VFormula &value)
 {
     if (!value.error())
     {
-        if (value.getDoubleValue() > 0) // Formula don't check this, but radius can't be 0 or negative
-        {
-            QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(m_id);
-            QSharedPointer<VArc> arc = qSharedPointerDynamicCast<VArc>(obj);
-            arc->SetFormulaRadius(value.GetFormula(FormulaType::FromUser), value.getDoubleValue());
-            SaveOption(obj);
-        }
+        QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(m_id);
+        QSharedPointer<VArc> arc = qSharedPointerDynamicCast<VArc>(obj);
+        arc->SetFormulaRadius(value.GetFormula(FormulaType::FromUser), value.getDoubleValue());
+        SaveOption(obj);
     }
 }
 
@@ -225,7 +222,6 @@ auto VToolArc::GetFormulaF1() const -> VFormula
     SCASSERT(arc.isNull() == false)
 
     VFormula f1(arc->GetFormulaF1(), getData());
-    f1.setCheckZero(false);
     f1.setToolId(m_id);
     f1.setPostfix(degreeSymbol);
     f1.Eval();
@@ -252,7 +248,6 @@ auto VToolArc::GetFormulaF2() const -> VFormula
     SCASSERT(arc.isNull() == false)
 
     VFormula f2(arc->GetFormulaF2(), getData());
-    f2.setCheckZero(false);
     f2.setToolId(m_id);
     f2.setPostfix(degreeSymbol);
     f2.Eval();
diff --git a/src/libs/vtools/tools/drawTools/toolcurve/vtoolarcwithlength.cpp b/src/libs/vtools/tools/drawTools/toolcurve/vtoolarcwithlength.cpp
index fda0a2a18..dd9f5277e 100644
--- a/src/libs/vtools/tools/drawTools/toolcurve/vtoolarcwithlength.cpp
+++ b/src/libs/vtools/tools/drawTools/toolcurve/vtoolarcwithlength.cpp
@@ -178,7 +178,6 @@ auto VToolArcWithLength::GetFormulaRadius() const -> VFormula
     SCASSERT(arc.isNull() == false)
 
     VFormula radius(arc->GetFormulaRadius(), getData());
-    radius.setCheckZero(true);
     radius.setToolId(m_id);
     radius.setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits()));
     radius.Eval();
@@ -190,13 +189,10 @@ void VToolArcWithLength::SetFormulaRadius(const VFormula &value)
 {
     if (value.error() == false)
     {
-        if (value.getDoubleValue() > 0) // Formula don't check this, but radius can't be 0 or negative
-        {
-            QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(m_id);
-            QSharedPointer<VArc> arc = qSharedPointerDynamicCast<VArc>(obj);
-            arc->SetFormulaRadius(value.GetFormula(FormulaType::FromUser), value.getDoubleValue());
-            SaveOption(obj);
-        }
+        QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(m_id);
+        QSharedPointer<VArc> arc = qSharedPointerDynamicCast<VArc>(obj);
+        arc->SetFormulaRadius(value.GetFormula(FormulaType::FromUser), value.getDoubleValue());
+        SaveOption(obj);
     }
 }
 
@@ -207,7 +203,6 @@ auto VToolArcWithLength::GetFormulaF1() const -> VFormula
     SCASSERT(arc.isNull() == false)
 
     VFormula f1(arc->GetFormulaF1(), getData());
-    f1.setCheckZero(false);
     f1.setToolId(m_id);
     f1.setPostfix(degreeSymbol);
     f1.Eval();
diff --git a/src/libs/vtools/tools/drawTools/toolcurve/vtoolellipticalarc.cpp b/src/libs/vtools/tools/drawTools/toolcurve/vtoolellipticalarc.cpp
index 7012221e9..935b2196e 100644
--- a/src/libs/vtools/tools/drawTools/toolcurve/vtoolellipticalarc.cpp
+++ b/src/libs/vtools/tools/drawTools/toolcurve/vtoolellipticalarc.cpp
@@ -206,7 +206,6 @@ auto VToolEllipticalArc::GetFormulaRadius1() const -> VFormula
     SCASSERT(elArc.isNull() == false)
 
     VFormula radius1(elArc->GetFormulaRadius1(), getData());
-    radius1.setCheckZero(true);
     radius1.setToolId(m_id);
     radius1.setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits()));
     radius1.Eval();
@@ -218,13 +217,10 @@ void VToolEllipticalArc::SetFormulaRadius1(const VFormula &value)
 {
     if (!value.error())
     {
-        if (value.getDoubleValue() > 0) // Formula don't check this, but radius1 can't be 0 or negative
-        {
-            QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(m_id);
-            QSharedPointer<VEllipticalArc> elArc = qSharedPointerDynamicCast<VEllipticalArc>(obj);
-            elArc->SetFormulaRadius1(value.GetFormula(FormulaType::FromUser), value.getDoubleValue());
-            SaveOption(obj);
-        }
+        QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(m_id);
+        QSharedPointer<VEllipticalArc> elArc = qSharedPointerDynamicCast<VEllipticalArc>(obj);
+        elArc->SetFormulaRadius1(value.GetFormula(FormulaType::FromUser), value.getDoubleValue());
+        SaveOption(obj);
     }
 }
 
@@ -235,7 +231,6 @@ auto VToolEllipticalArc::GetFormulaRadius2() const -> VFormula
     SCASSERT(elArc.isNull() == false)
 
     VFormula radius2(elArc->GetFormulaRadius2(), getData());
-    radius2.setCheckZero(true);
     radius2.setToolId(m_id);
     radius2.setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits()));
     radius2.Eval();
@@ -247,13 +242,10 @@ void VToolEllipticalArc::SetFormulaRadius2(const VFormula &value)
 {
     if (!value.error())
     {
-        if (value.getDoubleValue() > 0) // Formula don't check this, but radius2 can't be 0 or negative
-        {
-            QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(m_id);
-            QSharedPointer<VEllipticalArc> elArc = qSharedPointerDynamicCast<VEllipticalArc>(obj);
-            elArc->SetFormulaRadius2(value.GetFormula(FormulaType::FromUser), value.getDoubleValue());
-            SaveOption(obj);
-        }
+        QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(m_id);
+        QSharedPointer<VEllipticalArc> elArc = qSharedPointerDynamicCast<VEllipticalArc>(obj);
+        elArc->SetFormulaRadius2(value.GetFormula(FormulaType::FromUser), value.getDoubleValue());
+        SaveOption(obj);
     }
 }
 
@@ -264,7 +256,6 @@ auto VToolEllipticalArc::GetFormulaF1() const -> VFormula
     SCASSERT(elArc.isNull() == false)
 
     VFormula f1(elArc->GetFormulaF1(), getData());
-    f1.setCheckZero(false);
     f1.setToolId(m_id);
     f1.setPostfix(degreeSymbol);
     f1.Eval();
@@ -290,7 +281,6 @@ auto VToolEllipticalArc::GetFormulaF2() const -> VFormula
     SCASSERT(elArc.isNull() == false)
 
     VFormula f2(elArc->GetFormulaF2(), getData());
-    f2.setCheckZero(false);
     f2.setToolId(m_id);
     f2.setPostfix(degreeSymbol);
     f2.Eval();
@@ -316,7 +306,6 @@ auto VToolEllipticalArc::GetFormulaRotationAngle() const -> VFormula
     SCASSERT(elArc.isNull() == false)
 
     VFormula rotationAngle(elArc->GetFormulaRotationAngle(), getData());
-    rotationAngle.setCheckZero(false);
     rotationAngle.setToolId(m_id);
     rotationAngle.setPostfix(degreeSymbol);
     rotationAngle.Eval();
diff --git a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoolcurveintersectaxis.cpp b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoolcurveintersectaxis.cpp
index 91b48bd46..6a58a9c31 100644
--- a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoolcurveintersectaxis.cpp
+++ b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoolcurveintersectaxis.cpp
@@ -215,7 +215,6 @@ auto VToolCurveIntersectAxis::FindPoint(const QPointF &point, qreal angle, const
 auto VToolCurveIntersectAxis::GetFormulaAngle() const -> VFormula
 {
     VFormula fAngle(formulaAngle, getData());
-    fAngle.setCheckZero(false);
     fAngle.setToolId(m_id);
     fAngle.setPostfix(degreeSymbol);
     fAngle.Eval();
diff --git a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoolendline.cpp b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoolendline.cpp
index 42e93c036..0fad80ca4 100644
--- a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoolendline.cpp
+++ b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoolendline.cpp
@@ -35,8 +35,10 @@
 
 #include "../../../../../dialogs/tools/dialogendline.h"
 #include "../../../../../dialogs/tools/dialogtool.h"
-#include "../../../../../visualization/visualization.h"
 #include "../../../../../visualization/line/vistoolendline.h"
+#include "../../../../../visualization/visualization.h"
+#include "../../../../vabstracttool.h"
+#include "../../../vdrawtool.h"
 #include "../ifc/exception/vexception.h"
 #include "../ifc/ifcdef.h"
 #include "../vgeometry/vpointf.h"
@@ -45,8 +47,6 @@
 #include "../vpatterndb/vcontainer.h"
 #include "../vpatterndb/vtranslatevars.h"
 #include "../vwidgets/vmaingraphicsscene.h"
-#include "../../../../vabstracttool.h"
-#include "../../../vdrawtool.h"
 #include "vtoollinepoint.h"
 
 template <class T> class QSharedPointer;
@@ -60,9 +60,9 @@ const QString VToolEndLine::ToolType = QStringLiteral("endLine");
  * @param parent parent object.
  */
 VToolEndLine::VToolEndLine(const VToolEndLineInitData &initData, QGraphicsItem *parent)
-    :VToolLinePoint(initData.doc, initData.data, initData.id, initData.typeLine, initData.lineColor,
-                    initData.formulaLength, initData.basePointId, 0, initData.notes, parent),
-      formulaAngle(initData.formulaAngle)
+  : VToolLinePoint(initData.doc, initData.data, initData.id, initData.typeLine, initData.lineColor,
+                   initData.formulaLength, initData.basePointId, 0, initData.notes, parent),
+    formulaAngle(initData.formulaAngle)
 {
     ToolCreation(initData.typeCreation);
 }
@@ -133,11 +133,11 @@ auto VToolEndLine::Create(const QPointer<DialogTool> &dialog, VMainGraphicsScene
 auto VToolEndLine::Create(VToolEndLineInitData &initData) -> VToolEndLine *
 {
     const QSharedPointer<VPointF> basePoint = initData.data->GeometricObject<VPointF>(initData.basePointId);
-    QLineF line = QLineF(static_cast<QPointF>(*basePoint), QPointF(basePoint->x()+100, basePoint->y()));
+    QLineF line = QLineF(static_cast<QPointF>(*basePoint), QPointF(basePoint->x() + 100, basePoint->y()));
 
-    line.setAngle(CheckFormula(initData.id, initData.formulaAngle, initData.data)); //First set angle.
-    line.setLength(VAbstractValApplication::VApp()
-                   ->toPixel(CheckFormula(initData.id, initData.formulaLength, initData.data)));
+    line.setAngle(CheckFormula(initData.id, initData.formulaAngle, initData.data)); // First set angle.
+    line.setLength(
+        VAbstractValApplication::VApp()->toPixel(CheckFormula(initData.id, initData.formulaLength, initData.data)));
 
     VPointF *p = new VPointF(line.p2(), initData.name, initData.mx, initData.my);
     p->SetShowLabel(initData.showLabel);
@@ -174,8 +174,7 @@ auto VToolEndLine::Create(VToolEndLineInitData &initData) -> VToolEndLine *
 /**
  * @brief SaveDialog save options into file after change in dialog.
  */
-void VToolEndLine::SaveDialog(QDomElement &domElement, QList<quint32> &oldDependencies,
-                              QList<quint32> &newDependencies)
+void VToolEndLine::SaveDialog(QDomElement &domElement, QList<quint32> &oldDependencies, QList<quint32> &newDependencies)
 {
     SCASSERT(not m_dialog.isNull())
     const QPointer<DialogEndLine> dialogTool = qobject_cast<DialogEndLine *>(m_dialog);
@@ -191,7 +190,7 @@ void VToolEndLine::SaveDialog(QDomElement &domElement, QList<quint32> &oldDepend
     doc->SetAttribute(domElement, AttrAngle, dialogTool->GetAngle());
     doc->SetAttribute(domElement, AttrBasePoint, QString().setNum(dialogTool->GetBasePointId()));
     doc->SetAttributeOrRemoveIf<QString>(domElement, AttrNotes, dialogTool->GetNotes(),
-                                         [](const QString &notes) noexcept {return notes.isEmpty();});
+                                         [](const QString &notes) noexcept { return notes.isEmpty(); });
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -241,7 +240,6 @@ void VToolEndLine::SetVisualization()
 auto VToolEndLine::GetFormulaAngle() const -> VFormula
 {
     VFormula fAngle(formulaAngle, getData());
-    fAngle.setCheckZero(false);
     fAngle.setToolId(m_id);
     fAngle.setPostfix(degreeSymbol);
     fAngle.Eval();
@@ -273,9 +271,9 @@ void VToolEndLine::ShowContextMenu(QGraphicsSceneContextMenuEvent *event, quint3
     {
         ContextMenu<DialogEndLine>(event, id);
     }
-    catch(const VExceptionToolWasDeleted &e)
+    catch (const VExceptionToolWasDeleted &e)
     {
         Q_UNUSED(e)
-        return;//Leave this method immediately!!!
+        return; // Leave this method immediately!!!
     }
 }
diff --git a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoollineintersectaxis.cpp b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoollineintersectaxis.cpp
index 44eccb68b..c3476b6f6 100644
--- a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoollineintersectaxis.cpp
+++ b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoollineintersectaxis.cpp
@@ -221,7 +221,6 @@ auto VToolLineIntersectAxis::SecondLinePoint() const -> QString
 auto VToolLineIntersectAxis::GetFormulaAngle() const -> VFormula
 {
     VFormula fAngle(formulaAngle, getData());
-    fAngle.setCheckZero(false);
     fAngle.setToolId(m_id);
     fAngle.setPostfix(degreeSymbol);
     fAngle.Eval();
diff --git a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoollinepoint.cpp b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoollinepoint.cpp
index 0b3d3327c..a8ea99dd9 100644
--- a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoollinepoint.cpp
+++ b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoollinepoint.cpp
@@ -226,7 +226,6 @@ void VToolLinePoint::SetLineColor(const QString &value)
 auto VToolLinePoint::GetFormulaLength() const -> VFormula
 {
     VFormula fLength(formulaLength, this->getData());
-    fLength.setCheckZero(false);
     fLength.setToolId(m_id);
     fLength.setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits()));
     fLength.Eval();
@@ -237,7 +236,7 @@ auto VToolLinePoint::GetFormulaLength() const -> VFormula
 //---------------------------------------------------------------------------------------------------------------------
 void VToolLinePoint::SetFormulaLength(const VFormula &value)
 {
-    if (value.error() == false)
+    if (!value.error())
     {
         formulaLength = value.GetFormula(FormulaType::FromUser);
 
diff --git a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointfromcircleandtangent.cpp b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointfromcircleandtangent.cpp
index 640f22bd1..d2634ab60 100644
--- a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointfromcircleandtangent.cpp
+++ b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointfromcircleandtangent.cpp
@@ -33,20 +33,20 @@
 
 #include "../../../../dialogs/tools/dialogpointfromcircleandtangent.h"
 #include "../../../../dialogs/tools/dialogtool.h"
-#include "../../../../visualization/visualization.h"
 #include "../../../../visualization/line/vistoolpointfromcircleandtangent.h"
+#include "../../../../visualization/visualization.h"
+#include "../../../vabstracttool.h"
+#include "../../vdrawtool.h"
 #include "../ifc/exception/vexception.h"
 #include "../ifc/exception/vexceptionobjecterror.h"
-#include "../ifc/xml/vdomdocument.h"
 #include "../ifc/ifcdef.h"
+#include "../ifc/xml/vdomdocument.h"
 #include "../vgeometry/vgobject.h"
 #include "../vgeometry/vpointf.h"
 #include "../vmisc/vabstractapplication.h"
 #include "../vpatterndb/vcontainer.h"
 #include "../vpatterndb/vformula.h"
 #include "../vwidgets/vmaingraphicsscene.h"
-#include "../../../vabstracttool.h"
-#include "../../vdrawtool.h"
 #include "vtoolsinglepoint.h"
 
 template <class T> class QSharedPointer;
@@ -56,11 +56,11 @@ const QString VToolPointFromCircleAndTangent::ToolType = QStringLiteral("pointFr
 //---------------------------------------------------------------------------------------------------------------------
 VToolPointFromCircleAndTangent::VToolPointFromCircleAndTangent(const VToolPointFromCircleAndTangentInitData &initData,
                                                                QGraphicsItem *parent)
-    :VToolSinglePoint(initData.doc, initData.data, initData.id, initData.notes, parent),
-      circleCenterId(initData.circleCenterId),
-      tangentPointId(initData.tangentPointId),
-      circleRadius(initData.circleRadius),
-      crossPoint(initData.crossPoint)
+  : VToolSinglePoint(initData.doc, initData.data, initData.id, initData.notes, parent),
+    circleCenterId(initData.circleCenterId),
+    tangentPointId(initData.tangentPointId),
+    circleRadius(initData.circleRadius),
+    crossPoint(initData.crossPoint)
 {
     ToolCreation(initData.typeCreation);
 }
@@ -70,7 +70,7 @@ void VToolPointFromCircleAndTangent::SetDialog()
 {
     SCASSERT(not m_dialog.isNull())
     const QPointer<DialogPointFromCircleAndTangent> dialogTool =
-            qobject_cast<DialogPointFromCircleAndTangent *>(m_dialog);
+        qobject_cast<DialogPointFromCircleAndTangent *>(m_dialog);
     SCASSERT(not dialogTool.isNull())
     const QSharedPointer<VPointF> p = VAbstractTool::data.GeometricObject<VPointF>(m_id);
     dialogTool->SetCircleCenterId(circleCenterId);
@@ -87,7 +87,7 @@ auto VToolPointFromCircleAndTangent::Create(const QPointer<DialogTool> &dialog,
 {
     SCASSERT(not dialog.isNull())
     const QPointer<DialogPointFromCircleAndTangent> dialogTool =
-            qobject_cast<DialogPointFromCircleAndTangent *>(dialog);
+        qobject_cast<DialogPointFromCircleAndTangent *>(dialog);
     SCASSERT(not dialogTool.isNull())
 
     VToolPointFromCircleAndTangentInitData initData;
@@ -116,25 +116,27 @@ auto VToolPointFromCircleAndTangent::Create(VToolPointFromCircleAndTangentInitDa
     -> VToolPointFromCircleAndTangent *
 {
     const qreal radius =
-            VAbstractValApplication::VApp()->toPixel(CheckFormula(initData.id, initData.circleRadius, initData.data));
+        VAbstractValApplication::VApp()->toPixel(CheckFormula(initData.id, initData.circleRadius, initData.data));
     const VPointF cPoint = *initData.data->GeometricObject<VPointF>(initData.circleCenterId);
     const VPointF tPoint = *initData.data->GeometricObject<VPointF>(initData.tangentPointId);
 
     QPointF point;
-    const bool success = VToolPointFromCircleAndTangent::FindPoint(static_cast<QPointF>(tPoint),
-                                                                   static_cast<QPointF>(cPoint), radius,
-                                                                   initData.crossPoint, &point);
+    const bool success = VToolPointFromCircleAndTangent::FindPoint(
+        static_cast<QPointF>(tPoint), static_cast<QPointF>(cPoint), radius, initData.crossPoint, &point);
     if (not success)
     {
         const QString errorMsg = tr("Error calculating point '%1'. Tangent to circle with center '%2' and radius '%3' "
                                     "from point '%4' cannot be found")
-                .arg(initData.name, cPoint.name()).arg(radius).arg(tPoint.name());
+                                     .arg(initData.name, cPoint.name())
+                                     .arg(radius)
+                                     .arg(tPoint.name());
 
-        VAbstractApplication::VApp()->IsPedantic() ? throw VExceptionObjectError(errorMsg) :
-                                              qWarning() << VAbstractValApplication::warningMessageSignature + errorMsg;
+        VAbstractApplication::VApp()->IsPedantic()
+            ? throw VExceptionObjectError(errorMsg)
+            : qWarning() << VAbstractValApplication::warningMessageSignature + errorMsg;
     }
 
-    VPointF *p = new VPointF(point, initData.name, initData.mx, initData.my);
+    auto *p = new VPointF(point, initData.name, initData.mx, initData.my);
     p->SetShowLabel(initData.showLabel);
 
     if (initData.typeCreation == Source::FromGui)
@@ -153,7 +155,7 @@ auto VToolPointFromCircleAndTangent::Create(VToolPointFromCircleAndTangentInitDa
     if (initData.parse == Document::FullParse)
     {
         VAbstractTool::AddRecord(initData.id, Tool::PointFromCircleAndTangent, initData.doc);
-        VToolPointFromCircleAndTangent *point = new VToolPointFromCircleAndTangent(initData);
+        auto *point = new VToolPointFromCircleAndTangent(initData);
         initData.scene->addItem(point);
         InitToolConnections(initData.scene, point);
         VAbstractPattern::AddTool(initData.id, point);
@@ -171,9 +173,9 @@ auto VToolPointFromCircleAndTangent::FindPoint(const QPointF &p, const QPointF &
     SCASSERT(intersectionPoint != nullptr)
 
     QPointF p1, p2;
-    const int res = VGObject::ContactPoints (p, center, radius, p1, p2);
+    const int res = VGObject::ContactPoints(p, center, qAbs(radius), p1, p2);
 
-    switch(res)
+    switch (res)
     {
         case 2:
             *intersectionPoint = (crossPoint == CrossCirclesPoint::FirstPoint ? p1 : p2);
@@ -216,12 +218,9 @@ void VToolPointFromCircleAndTangent::SetCircleRadius(const VFormula &value)
 {
     if (value.error() == false)
     {
-        if (value.getDoubleValue() > 0)// Formula don't check this, but radius can't be 0 or negative
-        {
-            circleRadius = value.GetFormula(FormulaType::FromUser);
-            QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(m_id);
-            SaveOption(obj);
-        }
+        circleRadius = value.GetFormula(FormulaType::FromUser);
+        QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(m_id);
+        SaveOption(obj);
     }
 }
 
@@ -253,10 +252,10 @@ void VToolPointFromCircleAndTangent::ShowContextMenu(QGraphicsSceneContextMenuEv
     {
         ContextMenu<DialogPointFromCircleAndTangent>(event, id);
     }
-    catch(const VExceptionToolWasDeleted &e)
+    catch (const VExceptionToolWasDeleted &e)
     {
         Q_UNUSED(e)
-        return;//Leave this method immediately!!!
+        return; // Leave this method immediately!!!
     }
 }
 
@@ -276,7 +275,7 @@ void VToolPointFromCircleAndTangent::SaveDialog(QDomElement &domElement, QList<q
 {
     SCASSERT(not m_dialog.isNull())
     const QPointer<DialogPointFromCircleAndTangent> dialogTool =
-            qobject_cast<DialogPointFromCircleAndTangent *>(m_dialog);
+        qobject_cast<DialogPointFromCircleAndTangent *>(m_dialog);
     SCASSERT(not dialogTool.isNull())
 
     AddDependence(oldDependencies, circleCenterId);
@@ -291,7 +290,7 @@ void VToolPointFromCircleAndTangent::SaveDialog(QDomElement &domElement, QList<q
     doc->SetAttribute(domElement, AttrCrossPoint,
                       QString().setNum(static_cast<int>(dialogTool->GetCrossCirclesPoint())));
     doc->SetAttributeOrRemoveIf<QString>(domElement, AttrNotes, dialogTool->GetNotes(),
-                                         [](const QString &notes) noexcept {return notes.isEmpty();});
+                                         [](const QString &notes) noexcept { return notes.isEmpty(); });
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointfromcircleandtangent.h b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointfromcircleandtangent.h
index 6123bdb6b..d6e03961a 100644
--- a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointfromcircleandtangent.h
+++ b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointfromcircleandtangent.h
@@ -29,7 +29,6 @@
 #ifndef VTOOLPOINTFROMCIRCLEANDTANGENT_H
 #define VTOOLPOINTFROMCIRCLEANDTANGENT_H
 
-
 #include <QDomElement>
 #include <QGraphicsItem>
 #include <QMetaObject>
@@ -48,12 +47,13 @@ template <class T> class QSharedPointer;
 struct VToolPointFromCircleAndTangentInitData : VToolSinglePointInitData
 {
     VToolPointFromCircleAndTangentInitData()
-        : VToolSinglePointInitData(),
-          circleCenterId(NULL_ID),
-          circleRadius('0'),
-          tangentPointId(NULL_ID),
-          crossPoint(CrossCirclesPoint::FirstPoint)
-    {}
+      : VToolSinglePointInitData(),
+        circleCenterId(NULL_ID),
+        circleRadius('0'),
+        tangentPointId(NULL_ID),
+        crossPoint(CrossCirclesPoint::FirstPoint)
+    {
+    }
 
     quint32 circleCenterId;
     QString circleRadius;
@@ -64,6 +64,7 @@ struct VToolPointFromCircleAndTangentInitData : VToolSinglePointInitData
 class VToolPointFromCircleAndTangent : public VToolSinglePoint
 {
     Q_OBJECT // NOLINT
+
 public:
     virtual void SetDialog() override;
     static auto Create(const QPointer<DialogTool> &dialog, VMainGraphicsScene *scene, VAbstractPattern *doc,
@@ -73,20 +74,24 @@ public:
                           QPointF *intersectionPoint) -> bool;
     static const QString ToolType;
     virtual auto type() const -> int override { return Type; }
-    enum { Type = UserType + static_cast<int>(Tool::PointFromCircleAndTangent) };
+    enum
+    {
+        Type = UserType + static_cast<int>(Tool::PointFromCircleAndTangent)
+    };
 
     auto TangentPointName() const -> QString;
     auto CircleCenterPointName() const -> QString;
 
     auto GetCircleRadius() const -> VFormula;
-    void     SetCircleRadius(const VFormula &value);
+    void SetCircleRadius(const VFormula &value);
 
     auto GetCrossCirclesPoint() const -> CrossCirclesPoint;
-    void              SetCrossCirclesPoint(const CrossCirclesPoint &value);
+    void SetCrossCirclesPoint(const CrossCirclesPoint &value);
 
     virtual void ShowVisualization(bool show) override;
 protected slots:
-    virtual void ShowContextMenu(QGraphicsSceneContextMenuEvent *event, quint32 id=NULL_ID) override;
+    virtual void ShowContextMenu(QGraphicsSceneContextMenuEvent *event, quint32 id = NULL_ID) override;
+
 protected:
     virtual void RemoveReferens() override;
     virtual void SaveDialog(QDomElement &domElement, QList<quint32> &oldDependencies,
@@ -94,6 +99,7 @@ protected:
     virtual void SaveOptions(QDomElement &tag, QSharedPointer<VGObject> &obj) override;
     virtual void ReadToolAttributes(const QDomElement &domElement) override;
     virtual void SetVisualization() override;
+
 private:
     Q_DISABLE_COPY_MOVE(VToolPointFromCircleAndTangent) // NOLINT
 
diff --git a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofcontact.cpp b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofcontact.cpp
index c9a0f987c..de8be75d8 100644
--- a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofcontact.cpp
+++ b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofcontact.cpp
@@ -114,7 +114,7 @@ auto VToolPointOfContact::FindPoint(qreal radius, const QPointF &center, const Q
     SCASSERT(intersectionPoint != nullptr)
 
     QPointF p1, p2;
-    qint32 res = VGObject::LineIntersectCircle(center, radius, QLineF(firstPoint, secondPoint), p1, p2);
+    qint32 res = VGObject::LineIntersectCircle(center, qAbs(radius), QLineF(firstPoint, secondPoint), p1, p2);
     switch (res)
     {
         case 0:
@@ -126,8 +126,7 @@ auto VToolPointOfContact::FindPoint(qreal radius, const QPointF &center, const Q
         {
             const bool flagP1 = VGObject::IsPointOnLineSegment(p1, firstPoint, secondPoint);
             const bool flagP2 = VGObject::IsPointOnLineSegment(p2, firstPoint, secondPoint);
-            if ((flagP1 == true && flagP2 == true) ||
-                (flagP1 == false && flagP2 == false) /*In case we have something wrong*/)
+            if ((flagP1 && flagP2) || (!flagP1 && !flagP2) /*In case we have something wrong*/)
             {
                 // We don't have options for choosing correct point. Use closest to segment first point.
                 if (QLineF(firstPoint, p1).length() <= QLineF(firstPoint, p2).length())
@@ -139,17 +138,16 @@ auto VToolPointOfContact::FindPoint(qreal radius, const QPointF &center, const Q
                 *intersectionPoint = p2;
                 return true;
             }
-            else
-            { // In this case we have one real and one theoretical intersection.
-                if (flagP1)
-                {
-                    *intersectionPoint = p1;
-                    return true;
-                }
 
-                *intersectionPoint = p2;
+            // In this case we have one real and one theoretical intersection.
+            if (flagP1)
+            {
+                *intersectionPoint = p1;
                 return true;
             }
+
+            *intersectionPoint = p2;
+            return true;
         }
         default:
             qDebug() << "Unxpected value" << res;
@@ -417,7 +415,6 @@ void VToolPointOfContact::ShowContextMenu(QGraphicsSceneContextMenuEvent *event,
 auto VToolPointOfContact::getArcRadius() const -> VFormula
 {
     VFormula radius(arcRadius, this->getData());
-    radius.setCheckZero(true);
     radius.setToolId(m_id);
     radius.setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits()));
     radius.Eval();
diff --git a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofcontact.h b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofcontact.h
index 31e6cbb99..c95a6945e 100644
--- a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofcontact.h
+++ b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofcontact.h
@@ -29,7 +29,6 @@
 #ifndef VTOOLPOINTOFCONTACT_H
 #define VTOOLPOINTOFCONTACT_H
 
-
 #include <QDomElement>
 #include <QGraphicsItem>
 #include <QMetaObject>
@@ -48,12 +47,13 @@ template <class T> class QSharedPointer;
 struct VToolPointOfContactInitData : VToolSinglePointInitData
 {
     VToolPointOfContactInitData()
-        : VToolSinglePointInitData(),
-          radius('0'),
-          center(NULL_ID),
-          firstPointId(NULL_ID),
-          secondPointId(NULL_ID)
-    {}
+      : VToolSinglePointInitData(),
+        radius('0'),
+        center(NULL_ID),
+        firstPointId(NULL_ID),
+        secondPointId(NULL_ID)
+    {
+    }
 
     QString radius;
     quint32 center;
@@ -67,8 +67,9 @@ struct VToolPointOfContactInitData : VToolSinglePointInitData
 class VToolPointOfContact : public VToolSinglePoint
 {
     Q_OBJECT // NOLINT
+
 public:
-    virtual void   SetDialog() override;
+    virtual void SetDialog() override;
     static auto FindPoint(qreal radius, const QPointF &center, const QPointF &firstPoint, const QPointF &secondPoint,
                           QPointF *intersectionPoint) -> bool;
     static auto Create(const QPointer<DialogTool> &dialog, VMainGraphicsScene *scene, VAbstractPattern *doc,
@@ -76,41 +77,45 @@ public:
     static auto Create(VToolPointOfContactInitData &initData) -> VToolPointOfContact *;
     static const QString ToolType;
     virtual auto type() const -> int override { return Type; }
-    enum { Type = UserType + static_cast<int>(Tool::PointOfContact) };
+    enum
+    {
+        Type = UserType + static_cast<int>(Tool::PointOfContact)
+    };
 
     auto ArcCenterPointName() const -> QString;
     auto FirstPointName() const -> QString;
     auto SecondPointName() const -> QString;
 
     auto getArcRadius() const -> VFormula;
-    void     setArcRadius(const VFormula &value);
+    void setArcRadius(const VFormula &value);
 
-    virtual void   ShowVisualization(bool show) override;
+    virtual void ShowVisualization(bool show) override;
 protected slots:
-    virtual void ShowContextMenu(QGraphicsSceneContextMenuEvent *event, quint32 id=NULL_ID) override;
+    virtual void ShowContextMenu(QGraphicsSceneContextMenuEvent *event, quint32 id = NULL_ID) override;
+
 protected:
-    virtual void    RemoveReferens() override;
-    virtual void    SaveDialog(QDomElement &domElement, QList<quint32> &oldDependencies,
-                               QList<quint32> &newDependencies) override;
-    virtual void    SaveOptions(QDomElement &tag, QSharedPointer<VGObject> &obj) override;
-    virtual void    ReadToolAttributes(const QDomElement &domElement) override;
-    virtual void    SetVisualization() override;
+    virtual void RemoveReferens() override;
+    virtual void SaveDialog(QDomElement &domElement, QList<quint32> &oldDependencies,
+                            QList<quint32> &newDependencies) override;
+    virtual void SaveOptions(QDomElement &tag, QSharedPointer<VGObject> &obj) override;
+    virtual void ReadToolAttributes(const QDomElement &domElement) override;
+    virtual void SetVisualization() override;
     virtual auto MakeToolTip() const -> QString override;
 
 private:
     Q_DISABLE_COPY_MOVE(VToolPointOfContact) // NOLINT
 
     /** @brief radius string with formula radius arc. */
-    QString        arcRadius;
+    QString arcRadius;
 
     /** @brief center id center arc point. */
-    quint32        center;
+    quint32 center;
 
     /** @brief firstPointId id first line point. */
-    quint32        firstPointId;
+    quint32 firstPointId;
 
     /** @brief secondPointId id second line point. */
-    quint32        secondPointId;
+    quint32 secondPointId;
 
     VToolPointOfContact(const VToolPointOfContactInitData &initData, QGraphicsItem *parent = nullptr);
 };
diff --git a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofintersectioncircles.cpp b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofintersectioncircles.cpp
index 4a7a45164..d38e58540 100644
--- a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofintersectioncircles.cpp
+++ b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofintersectioncircles.cpp
@@ -33,20 +33,20 @@
 
 #include "../../../../dialogs/tools/dialogpointofintersectioncircles.h"
 #include "../../../../dialogs/tools/dialogtool.h"
-#include "../../../../visualization/visualization.h"
 #include "../../../../visualization/line/vistoolpointofintersectioncircles.h"
+#include "../../../../visualization/visualization.h"
+#include "../../../vabstracttool.h"
+#include "../../vdrawtool.h"
 #include "../ifc/exception/vexception.h"
 #include "../ifc/exception/vexceptionobjecterror.h"
-#include "../ifc/xml/vdomdocument.h"
 #include "../ifc/ifcdef.h"
+#include "../ifc/xml/vdomdocument.h"
 #include "../vgeometry/vgobject.h"
 #include "../vgeometry/vpointf.h"
 #include "../vmisc/vabstractapplication.h"
 #include "../vpatterndb/vcontainer.h"
 #include "../vpatterndb/vformula.h"
 #include "../vwidgets/vmaingraphicsscene.h"
-#include "../../../vabstracttool.h"
-#include "../../vdrawtool.h"
 #include "vtoolsinglepoint.h"
 
 template <class T> class QSharedPointer;
@@ -55,13 +55,13 @@ const QString VToolPointOfIntersectionCircles::ToolType = QStringLiteral("pointO
 
 //---------------------------------------------------------------------------------------------------------------------
 VToolPointOfIntersectionCircles::VToolPointOfIntersectionCircles(
-        const VToolPointOfIntersectionCirclesInitData &initData, QGraphicsItem *parent)
-    :VToolSinglePoint(initData.doc, initData.data, initData.id, initData.notes, parent),
-      firstCircleCenterId(initData.firstCircleCenterId),
-      secondCircleCenterId(initData.secondCircleCenterId),
-      firstCircleRadius(initData.firstCircleRadius),
-      secondCircleRadius(initData.secondCircleRadius),
-      crossPoint(initData.crossPoint)
+    const VToolPointOfIntersectionCirclesInitData &initData, QGraphicsItem *parent)
+  : VToolSinglePoint(initData.doc, initData.data, initData.id, initData.notes, parent),
+    firstCircleCenterId(initData.firstCircleCenterId),
+    secondCircleCenterId(initData.secondCircleCenterId),
+    firstCircleRadius(initData.firstCircleRadius),
+    secondCircleRadius(initData.secondCircleRadius),
+    crossPoint(initData.crossPoint)
 {
     ToolCreation(initData.typeCreation);
 }
@@ -71,7 +71,7 @@ void VToolPointOfIntersectionCircles::SetDialog()
 {
     SCASSERT(not m_dialog.isNull())
     const QPointer<DialogPointOfIntersectionCircles> dialogTool =
-            qobject_cast<DialogPointOfIntersectionCircles *>(m_dialog);
+        qobject_cast<DialogPointOfIntersectionCircles *>(m_dialog);
     SCASSERT(not dialogTool.isNull())
     const QSharedPointer<VPointF> p = VAbstractTool::data.GeometricObject<VPointF>(m_id);
     dialogTool->SetFirstCircleCenterId(firstCircleCenterId);
@@ -90,7 +90,7 @@ auto VToolPointOfIntersectionCircles::Create(const QPointer<DialogTool> &dialog,
 {
     SCASSERT(not dialog.isNull())
     const QPointer<DialogPointOfIntersectionCircles> dialogTool =
-            qobject_cast<DialogPointOfIntersectionCircles *>(dialog);
+        qobject_cast<DialogPointOfIntersectionCircles *>(dialog);
     SCASSERT(not dialogTool.isNull())
 
     VToolPointOfIntersectionCirclesInitData initData;
@@ -119,10 +119,10 @@ auto VToolPointOfIntersectionCircles::Create(const QPointer<DialogTool> &dialog,
 auto VToolPointOfIntersectionCircles::Create(VToolPointOfIntersectionCirclesInitData &initData)
     -> VToolPointOfIntersectionCircles *
 {
-    const qreal calcC1Radius = VAbstractValApplication::VApp()
-            ->toPixel(CheckFormula(initData.id, initData.firstCircleRadius, initData.data));
-    const qreal calcC2Radius = VAbstractValApplication::VApp()
-            ->toPixel(CheckFormula(initData.id, initData.secondCircleRadius, initData.data));
+    const qreal calcC1Radius =
+        VAbstractValApplication::VApp()->toPixel(CheckFormula(initData.id, initData.firstCircleRadius, initData.data));
+    const qreal calcC2Radius =
+        VAbstractValApplication::VApp()->toPixel(CheckFormula(initData.id, initData.secondCircleRadius, initData.data));
 
     const VPointF c1Point = *initData.data->GeometricObject<VPointF>(initData.firstCircleCenterId);
     const VPointF c2Point = *initData.data->GeometricObject<VPointF>(initData.secondCircleCenterId);
@@ -134,9 +134,11 @@ auto VToolPointOfIntersectionCircles::Create(VToolPointOfIntersectionCirclesInit
     if (not success)
     {
         const QString errorMsg = tr("Error calculating point '%1'. Circles with centers in points '%2' and '%3' have "
-                                    "no point of intersection").arg(initData.name, c1Point.name(), c2Point.name());
-        VAbstractApplication::VApp()->IsPedantic() ? throw VExceptionObjectError(errorMsg) :
-                                              qWarning() << VAbstractValApplication::warningMessageSignature + errorMsg;
+                                    "no point of intersection")
+                                     .arg(initData.name, c1Point.name(), c2Point.name());
+        VAbstractApplication::VApp()->IsPedantic()
+            ? throw VExceptionObjectError(errorMsg)
+            : qWarning() << VAbstractValApplication::warningMessageSignature + errorMsg;
     }
 
     VPointF *p = new VPointF(point, initData.name, initData.mx, initData.my);
@@ -177,9 +179,9 @@ auto VToolPointOfIntersectionCircles::FindPoint(const QPointF &c1Point, const QP
     SCASSERT(intersectionPoint != nullptr)
 
     QPointF p1, p2;
-    const int res = VGObject::IntersectionCircles(c1Point, c1Radius, c2Point, c2Radius, p1, p2);
+    const int res = VGObject::IntersectionCircles(c1Point, qAbs(c1Radius), c2Point, qAbs(c2Radius), p1, p2);
 
-    switch(res)
+    switch (res)
     {
         case 2:
             if (crossPoint == CrossCirclesPoint::FirstPoint)
@@ -218,7 +220,6 @@ auto VToolPointOfIntersectionCircles::SecondCircleCenterPointName() const -> QSt
 auto VToolPointOfIntersectionCircles::GetFirstCircleRadius() const -> VFormula
 {
     VFormula radius(firstCircleRadius, getData());
-    radius.setCheckZero(true);
     radius.setToolId(m_id);
     radius.setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits()));
     radius.Eval();
@@ -228,14 +229,11 @@ auto VToolPointOfIntersectionCircles::GetFirstCircleRadius() const -> VFormula
 //---------------------------------------------------------------------------------------------------------------------
 void VToolPointOfIntersectionCircles::SetFirstCircleRadius(const VFormula &value)
 {
-    if (value.error() == false)
+    if (!value.error())
     {
-        if (value.getDoubleValue() > 0)// Formula don't check this, but radius can't be 0 or negative
-        {
-            firstCircleRadius = value.GetFormula(FormulaType::FromUser);
-            QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(m_id);
-            SaveOption(obj);
-        }
+        firstCircleRadius = value.GetFormula(FormulaType::FromUser);
+        QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(m_id);
+        SaveOption(obj);
     }
 }
 
@@ -243,7 +241,6 @@ void VToolPointOfIntersectionCircles::SetFirstCircleRadius(const VFormula &value
 auto VToolPointOfIntersectionCircles::GetSecondCircleRadius() const -> VFormula
 {
     VFormula radius(secondCircleRadius, getData());
-    radius.setCheckZero(true);
     radius.setToolId(m_id);
     radius.setPostfix(UnitsToStr(VAbstractValApplication::VApp()->patternUnits()));
     radius.Eval();
@@ -253,14 +250,11 @@ auto VToolPointOfIntersectionCircles::GetSecondCircleRadius() const -> VFormula
 //---------------------------------------------------------------------------------------------------------------------
 void VToolPointOfIntersectionCircles::SetSecondCircleRadius(const VFormula &value)
 {
-    if (value.error() == false)
+    if (!value.error())
     {
-        if (value.getDoubleValue() > 0)// Formula don't check this, but radius can't be 0 or negative
-        {
-            secondCircleRadius = value.GetFormula(FormulaType::FromUser);
-            QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(m_id);
-            SaveOption(obj);
-        }
+        secondCircleRadius = value.GetFormula(FormulaType::FromUser);
+        QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(m_id);
+        SaveOption(obj);
     }
 }
 
@@ -292,10 +286,10 @@ void VToolPointOfIntersectionCircles::ShowContextMenu(QGraphicsSceneContextMenuE
     {
         ContextMenu<DialogPointOfIntersectionCircles>(event, id);
     }
-    catch(const VExceptionToolWasDeleted &e)
+    catch (const VExceptionToolWasDeleted &e)
     {
         Q_UNUSED(e)
-        return;//Leave this method immediately!!!
+        return; // Leave this method immediately!!!
     }
 }
 
@@ -315,7 +309,7 @@ void VToolPointOfIntersectionCircles::SaveDialog(QDomElement &domElement, QList<
 {
     SCASSERT(not m_dialog.isNull())
     const QPointer<DialogPointOfIntersectionCircles> dialogTool =
-            qobject_cast<DialogPointOfIntersectionCircles *>(m_dialog);
+        qobject_cast<DialogPointOfIntersectionCircles *>(m_dialog);
     SCASSERT(not dialogTool.isNull())
 
     AddDependence(oldDependencies, firstCircleCenterId);
@@ -331,7 +325,7 @@ void VToolPointOfIntersectionCircles::SaveDialog(QDomElement &domElement, QList<
     doc->SetAttribute(domElement, AttrCrossPoint,
                       QString().setNum(static_cast<int>(dialogTool->GetCrossCirclesPoint())));
     doc->SetAttributeOrRemoveIf<QString>(domElement, AttrNotes, dialogTool->GetNotes(),
-                                         [](const QString &notes) noexcept {return notes.isEmpty();});
+                                         [](const QString &notes) noexcept { return notes.isEmpty(); });
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/libs/vtools/visualization/line/operation/vistoolmove.cpp b/src/libs/vtools/visualization/line/operation/vistoolmove.cpp
index c58a9ac38..f4af76afd 100644
--- a/src/libs/vtools/visualization/line/operation/vistoolmove.cpp
+++ b/src/libs/vtools/visualization/line/operation/vistoolmove.cpp
@@ -88,7 +88,7 @@ void VisToolMove::RefreshGeometry()
     qreal tempRoationAngle = 0;
 
     QLineF line;
-    if (qFuzzyIsNull(m_length))
+    if (qIsInf(m_length))
     {
         if (QGuiApplication::keyboardModifiers() == Qt::ShiftModifier)
         {
@@ -157,21 +157,30 @@ void VisToolMove::RefreshGeometry()
         DrawPath(m_angleArc, arc.GetPath(), Qt::SolidLine, Qt::RoundCap);
     }
     DrawLine(this, line, Qt::DashLine);
-    DrawPoint(m_pointFinish, line.p2());
 
-    static const QString prefix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
     if (qFuzzyIsNull(m_length))
     {
-        SetToolTip(tr("Length = %1%2, angle = %3°, <b>%4</b> - sticking angle, "
-                      "<b>Mouse click</b> - finish selecting a position")
-                       .arg(LengthToUser(tempLength), prefix, AngleToUser(tempAngle), VModifierKey::Shift()));
+        setVisible(true);
     }
-    else
+
+    DrawPoint(m_pointFinish, line.p2());
+
+    if (GetMode() == Mode::Creation)
     {
-        SetToolTip(tr("Length = %1%2, angle = %3°, rotation angle = %4°, <b>%5</b> - sticking angle, "
-                      "<b>%6</b> - change rotation origin point, <b>Mouse click</b> - finish creating")
-                       .arg(LengthToUser(tempLength), prefix, AngleToUser(tempAngle), AngleToUser(tempRoationAngle),
-                            VModifierKey::Shift(), VModifierKey::Control()));
+        static const QString prefix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
+        if (qIsInf(m_length))
+        {
+            SetToolTip(tr("Length = %1%2, angle = %3°, <b>%4</b> - sticking angle, "
+                          "<b>Mouse click</b> - finish selecting a position")
+                           .arg(LengthToUser(tempLength), prefix, AngleToUser(tempAngle), VModifierKey::Shift()));
+        }
+        else
+        {
+            SetToolTip(tr("Length = %1%2, angle = %3°, rotation angle = %4°, <b>%5</b> - sticking angle, "
+                          "<b>%6</b> - change rotation origin point, <b>Mouse click</b> - finish creating")
+                           .arg(LengthToUser(tempLength), prefix, AngleToUser(tempAngle), AngleToUser(tempRoationAngle),
+                                VModifierKey::Shift(), VModifierKey::Control()));
+        }
     }
 
     CreateMovedRotatedObjects(iPoint, iCurve, tempLength, tempAngle, tempRoationAngle, origin);
diff --git a/src/libs/vtools/visualization/line/operation/vistoolmove.h b/src/libs/vtools/visualization/line/operation/vistoolmove.h
index 6fd9306ad..aeece5d3c 100644
--- a/src/libs/vtools/visualization/line/operation/vistoolmove.h
+++ b/src/libs/vtools/visualization/line/operation/vistoolmove.h
@@ -37,6 +37,7 @@
 #include <QString>
 #include <QVector>
 #include <QtGlobal>
+#include <limits>
 
 #include "../vmisc/def.h"
 #include "visoperation.h"
@@ -74,7 +75,7 @@ private:
     Q_DISABLE_COPY_MOVE(VisToolMove) // NOLINT
     qreal m_angle{0};
     qreal m_rotationAngle{INT_MIN};
-    qreal m_length{0};
+    qreal m_length{std::numeric_limits<qreal>::infinity()};
     VScaledEllipse *m_pointOrigin{nullptr};
     VScaledEllipse *m_pointRotationOrigin{nullptr};
     VScaledEllipse *m_pointFinish{nullptr};
diff --git a/src/libs/vtools/visualization/path/vistoolcutarc.cpp b/src/libs/vtools/visualization/path/vistoolcutarc.cpp
index ccba07d62..8f5c173d0 100644
--- a/src/libs/vtools/visualization/path/vistoolcutarc.cpp
+++ b/src/libs/vtools/visualization/path/vistoolcutarc.cpp
@@ -82,6 +82,7 @@ void VisToolCutArc::RefreshGeometry()
         {
             QPointF p = arc->ClosestPoint(ScenePos());
             qreal length = arc->GetLengthByPoint(p);
+            length = !arc->IsFlipped() ? qBound(0.0, length, arc->GetLength()) : qBound(arc->GetLength(), -length, 0.0);
 
             DrawPoint(m_point, p);
 
diff --git a/src/test/ValentinaTest/tst_varc.cpp b/src/test/ValentinaTest/tst_varc.cpp
index f6ba5539b..38ee95128 100644
--- a/src/test/ValentinaTest/tst_varc.cpp
+++ b/src/test/ValentinaTest/tst_varc.cpp
@@ -93,18 +93,39 @@ void TST_VArc::CompareTwoWays()
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-// cppcheck-suppress unusedFunction
-void TST_VArc::NegativeArc()
+void TST_VArc::ArcByLength_data()
 {
-    const VPointF center;
-    const qreal radius = 100;
-    const qreal f1 = 1;
-    const qreal f2 = 316;
-    const qreal length = M_PI * radius / 180 * 45;
-    VArc arc(-length, center, radius, f1);
+    QTest::addColumn<qreal>("radius");
+    QTest::addColumn<qreal>("startAngle");
+    QTest::addColumn<qreal>("endAngle");
+    QTest::addColumn<qreal>("arcAngle");
+    QTest::addColumn<bool>("flipped");
+    QTest::addColumn<int>("direction");
 
-    QCOMPARE(arc.GetLength(), -length);
-    QCOMPARE(arc.GetEndAngle(), f2);
+    QTest::newRow("Positive radius, positive length") << 100. << 1. << 316. << 315. << false << 1;
+    QTest::newRow("Positive radius, negative length") << 100. << 1. << 316. << 45. << true << -1;
+    QTest::newRow("Negative radius, negative length") << -100. << 1. << 316. << 45. << true << -1;
+    QTest::newRow("Negative radius, positive length") << -100. << 1. << 316. << 45. << true << -1;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void TST_VArc::ArcByLength()
+{
+    QFETCH(qreal, radius);
+    QFETCH(qreal, startAngle);
+    QFETCH(qreal, endAngle);
+    QFETCH(qreal, arcAngle);
+    QFETCH(bool, flipped);
+    QFETCH(int, direction);
+
+    const qreal length = (M_PI * qAbs(radius) / 180 * arcAngle) * direction;
+    VArc arc(length, VPointF(), radius, startAngle);
+
+    QCOMPARE(arc.GetLength(), length);
+    QCOMPARE(arc.GetEndAngle(), endAngle);
+    QCOMPARE(arc.IsFlipped(), flipped);
+    QCOMPARE(arc.GetRadius(), radius);
+    QCOMPARE(arc.AngleArc(), arcAngle);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -116,82 +137,147 @@ void TST_VArc::TestGetPoints_data()
     QTest::addColumn<qreal>("endAngle");
 
     QTest::newRow("Full circle: radius 10") << 10.0 << 0.0 << 360.0;
+    QTest::newRow("Full circle: radius -10") << -10.0 << 0.0 << 360.0;
     QTest::newRow("Full circle: radius 150") << 150.0 << 0.0 << 360.0;
+    QTest::newRow("Full circle: radius -150") << -150.0 << 0.0 << 360.0;
     QTest::newRow("Full circle: radius 1500") << 1500.0 << 0.0 << 360.0;
+    QTest::newRow("Full circle: radius -1500") << -1500.0 << 0.0 << 360.0;
     QTest::newRow("Full circle: radius 50000") << 50000.0 << 0.0 << 360.0;
+    QTest::newRow("Full circle: radius -50000") << -50000.0 << 0.0 << 360.0;
     QTest::newRow("Full circle: radius 90000") << 90000.0 << 0.0 << 360.0;
+    QTest::newRow("Full circle: radius -90000") << -90000.0 << 0.0 << 360.0;
 
     QTest::newRow("Arc less than 45 degree, radius 100") << 100.0 << 0.0 << 10.5;
+    QTest::newRow("Arc less than 45 degree, radius -100") << -100.0 << 0.0 << 10.5;
     QTest::newRow("Arc less than 45 degree, radius 150") << 150.0 << 0.0 << 10.5;
+    QTest::newRow("Arc less than 45 degree, radius -150") << -150.0 << 0.0 << 10.5;
     QTest::newRow("Arc less than 45 degree, radius 1500") << 1500.0 << 0.0 << 10.5;
+    QTest::newRow("Arc less than 45 degree, radius -1500") << -1500.0 << 0.0 << 10.5;
     QTest::newRow("Arc less than 45 degree, radius 50000") << 50000.0 << 0.0 << 10.5;
+    QTest::newRow("Arc less than 45 degree, radius -50000") << -50000.0 << 0.0 << 10.5;
     QTest::newRow("Arc less than 45 degree, radius 90000") << 90000.0 << 0.0 << 10.5;
+    QTest::newRow("Arc less than 45 degree, radius -90000") << -90000.0 << 0.0 << 10.5;
 
     QTest::newRow("Arc 45 degree, radius 100") << 100.0 << 0.0 << 45.0;
+    QTest::newRow("Arc 45 degree, radius -100") << -100.0 << 0.0 << 45.0;
     QTest::newRow("Arc 45 degree, radius 150") << 150.0 << 0.0 << 45.0;
+    QTest::newRow("Arc 45 degree, radius -150") << -150.0 << 0.0 << 45.0;
     QTest::newRow("Arc 45 degree, radius 1500") << 1500.0 << 0.0 << 45.0;
+    QTest::newRow("Arc 45 degree, radius -1500") << -1500.0 << 0.0 << 45.0;
     QTest::newRow("Arc 45 degree, radius 50000") << 50000.0 << 0.0 << 45.0;
+    QTest::newRow("Arc 45 degree, radius -50000") << -50000.0 << 0.0 << 45.0;
     QTest::newRow("Arc 45 degree, radius 90000") << 90000.0 << 0.0 << 45.0;
+    QTest::newRow("Arc 45 degree, radius -90000") << -90000.0 << 0.0 << 45.0;
 
     QTest::newRow("Arc less than 90 degree, radius 100") << 100.0 << 0.0 << 75.0;
+    QTest::newRow("Arc less than 90 degree, radius -100") << -100.0 << 0.0 << 75.0;
     QTest::newRow("Arc less than 90 degree, radius 150") << 150.0 << 0.0 << 75.0;
+    QTest::newRow("Arc less than 90 degree, radius -150") << -150.0 << 0.0 << 75.0;
     QTest::newRow("Arc less than 90 degree, radius 1500") << 1500.0 << 0.0 << 75.0;
+    QTest::newRow("Arc less than 90 degree, radius -1500") << -1500.0 << 0.0 << 75.0;
     QTest::newRow("Arc less than 90 degree, radius 50000") << 50000.0 << 0.0 << 75.0;
+    QTest::newRow("Arc less than 90 degree, radius -50000") << -50000.0 << 0.0 << 75.0;
     QTest::newRow("Arc less than 90 degree, radius 90000") << 90000.0 << 0.0 << 75.0;
+    QTest::newRow("Arc less than 90 degree, radius -90000") << -90000.0 << 0.0 << 75.0;
 
     QTest::newRow("Arc 90 degree, radius 100") << 100.0 << 0.0 << 90.0;
+    QTest::newRow("Arc 90 degree, radius -100") << -100.0 << 0.0 << 90.0;
     QTest::newRow("Arc 90 degree, radius 150") << 150.0 << 0.0 << 90.0;
+    QTest::newRow("Arc 90 degree, radius -150") << -150.0 << 0.0 << 90.0;
     QTest::newRow("Arc 90 degree, radius 1500") << 1500.0 << 0.0 << 90.0;
+    QTest::newRow("Arc 90 degree, radius -1500") << -1500.0 << 0.0 << 90.0;
     QTest::newRow("Arc 90 degree, radius 50000") << 50000.0 << 0.0 << 90.0;
+    QTest::newRow("Arc 90 degree, radius -50000") << -50000.0 << 0.0 << 90.0;
     QTest::newRow("Arc 90 degree, radius 90000") << 90000.0 << 0.0 << 90.0;
+    QTest::newRow("Arc 90 degree, radius -90000") << -90000.0 << 0.0 << 90.0;
 
     QTest::newRow("Arc less than 135 degree, radius 100") << 100.0 << 0.0 << 110.6;
+    QTest::newRow("Arc less than 135 degree, radius -100") << -100.0 << 0.0 << 110.6;
     QTest::newRow("Arc less than 135 degree, radius 150") << 150.0 << 0.0 << 110.6;
+    QTest::newRow("Arc less than 135 degree, radius -150") << -150.0 << 0.0 << 110.6;
     QTest::newRow("Arc less than 135 degree, radius 1500") << 1500.0 << 0.0 << 110.6;
+    QTest::newRow("Arc less than 135 degree, radius -1500") << -1500.0 << 0.0 << 110.6;
     QTest::newRow("Arc less than 135 degree, radius 50000") << 50000.0 << 0.0 << 110.6;
+    QTest::newRow("Arc less than 135 degree, radius -50000") << -50000.0 << 0.0 << 110.6;
     QTest::newRow("Arc less than 135 degree, radius 90000") << 90000.0 << 0.0 << 110.6;
+    QTest::newRow("Arc less than 135 degree, radius -90000") << -90000.0 << 0.0 << 110.6;
 
     QTest::newRow("Arc 135 degree, radius 100") << 100.0 << 0.0 << 135.0;
+    QTest::newRow("Arc 135 degree, radius -100") << -100.0 << 0.0 << 135.0;
     QTest::newRow("Arc 135 degree, radius 150") << 150.0 << 0.0 << 135.0;
+    QTest::newRow("Arc 135 degree, radius -150") << -150.0 << 0.0 << 135.0;
     QTest::newRow("Arc 135 degree, radius 1500") << 1500.0 << 0.0 << 135.0;
+    QTest::newRow("Arc 135 degree, radius -1500") << -1500.0 << 0.0 << 135.0;
     QTest::newRow("Arc 135 degree, radius 50000") << 50000.0 << 0.0 << 135.0;
+    QTest::newRow("Arc 135 degree, radius -50000") << -50000.0 << 0.0 << 135.0;
     QTest::newRow("Arc 135 degree, radius 90000") << 90000.0 << 0.0 << 135.0;
+    QTest::newRow("Arc 135 degree, radius -90000") << -90000.0 << 0.0 << 135.0;
 
     QTest::newRow("Arc less than 180 degree, radius 100") << 100.0 << 0.0 << 160.7;
+    QTest::newRow("Arc less than 180 degree, radius -100") << -100.0 << 0.0 << 160.7;
     QTest::newRow("Arc less than 180 degree, radius 150") << 150.0 << 0.0 << 160.7;
+    QTest::newRow("Arc less than 180 degree, radius -150") << -150.0 << 0.0 << 160.7;
     QTest::newRow("Arc less than 180 degree, radius 1500") << 1500.0 << 0.0 << 160.7;
+    QTest::newRow("Arc less than 180 degree, radius -1500") << -1500.0 << 0.0 << 160.7;
     QTest::newRow("Arc less than 180 degree, radius 50000") << 50000.0 << 0.0 << 160.7;
+    QTest::newRow("Arc less than 180 degree, radius -50000") << -50000.0 << 0.0 << 160.7;
     QTest::newRow("Arc less than 180 degree, radius 90000") << 90000.0 << 0.0 << 160.7;
+    QTest::newRow("Arc less than 180 degree, radius -90000") << -90000.0 << 0.0 << 160.7;
 
     QTest::newRow("Arc 180 degree, radius 100") << 100.0 << 0.0 << 180.0;
+    QTest::newRow("Arc 180 degree, radius -100") << -100.0 << 0.0 << 180.0;
     QTest::newRow("Arc 180 degree, radius 150") << 150.0 << 0.0 << 180.0;
+    QTest::newRow("Arc 180 degree, radius -150") << -150.0 << 0.0 << 180.0;
     QTest::newRow("Arc 180 degree, radius 1500") << 1500.0 << 0.0 << 180.0;
+    QTest::newRow("Arc 180 degree, radius -1500") << -1500.0 << 0.0 << 180.0;
     QTest::newRow("Arc 180 degree, radius 50000") << 50000.0 << 0.0 << 180.0;
+    QTest::newRow("Arc 180 degree, radius -50000") << -50000.0 << 0.0 << 180.0;
     QTest::newRow("Arc 180 degree, radius 90000") << 90000.0 << 0.0 << 180.0;
+    QTest::newRow("Arc 180 degree, radius -90000") << -90000.0 << 0.0 << 180.0;
 
     QTest::newRow("Arc less than 270 degree, radius 100") << 100.0 << 0.0 << 150.3;
+    QTest::newRow("Arc less than 270 degree, radius -100") << -100.0 << 0.0 << 150.3;
     QTest::newRow("Arc less than 270 degree, radius 150") << 150.0 << 0.0 << 150.3;
+    QTest::newRow("Arc less than 270 degree, radius -150") << -150.0 << 0.0 << 150.3;
     QTest::newRow("Arc less than 270 degree, radius 1500") << 1500.0 << 0.0 << 150.3;
+    QTest::newRow("Arc less than 270 degree, radius -1500") << -1500.0 << 0.0 << 150.3;
     QTest::newRow("Arc less than 270 degree, radius 50000") << 50000.0 << 0.0 << 150.3;
+    QTest::newRow("Arc less than 270 degree, radius -50000") << -50000.0 << 0.0 << 150.3;
     QTest::newRow("Arc less than 270 degree, radius 90000") << 90000.0 << 0.0 << 150.3;
+    QTest::newRow("Arc less than 270 degree, radius -90000") << -90000.0 << 0.0 << 150.3;
 
     QTest::newRow("Arc 270 degree, radius 100") << 100.0 << 0.0 << 270.0;
+    QTest::newRow("Arc 270 degree, radius -100") << -100.0 << 0.0 << 270.0;
     QTest::newRow("Arc 270 degree, radius 150") << 150.0 << 0.0 << 270.0;
+    QTest::newRow("Arc 270 degree, radius -150") << -150.0 << 0.0 << 270.0;
     QTest::newRow("Arc 270 degree, radius 1500") << 1500.0 << 0.0 << 270.0;
+    QTest::newRow("Arc 270 degree, radius -1500") << -1500.0 << 0.0 << 270.0;
     QTest::newRow("Arc 270 degree, radius 50000") << 50000.0 << 0.0 << 270.0;
+    QTest::newRow("Arc 270 degree, radius -50000") << -50000.0 << 0.0 << 270.0;
     QTest::newRow("Arc 270 degree, radius 90000") << 90000.0 << 0.0 << 270.0;
+    QTest::newRow("Arc 270 degree, radius -90000") << -90000.0 << 0.0 << 270.0;
 
     QTest::newRow("Arc less than 360 degree, radius 100") << 100.0 << 0.0 << 340.0;
+    QTest::newRow("Arc less than 360 degree, radius -100") << -100.0 << 0.0 << 340.0;
     QTest::newRow("Arc less than 360 degree, radius 150") << 150.0 << 0.0 << 340.0;
+    QTest::newRow("Arc less than 360 degree, radius -150") << -150.0 << 0.0 << 340.0;
     QTest::newRow("Arc less than 360 degree, radius 1500") << 1500.0 << 0.0 << 340.0;
+    QTest::newRow("Arc less than 360 degree, radius -1500") << -1500.0 << 0.0 << 340.0;
     QTest::newRow("Arc less than 360 degree, radius 50000") << 50000.0 << 0.0 << 340.0;
+    QTest::newRow("Arc less than 360 degree, radius -50000") << -50000.0 << 0.0 << 340.0;
     QTest::newRow("Arc less than 360 degree, radius 90000") << 90000.0 << 0.0 << 340.0;
+    QTest::newRow("Arc less than 360 degree, radius -90000") << -90000.0 << 0.0 << 340.0;
 
     QTest::newRow("Arc start 90 degree, angle 45 degree, radius 100") << 100.0 << 90.0 << 135.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radius -100") << -100.0 << 90.0 << 135.0;
     QTest::newRow("Arc start 90 degree, angle 45 degree, radius 150") << 150.0 << 90.0 << 135.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radius -150") << -150.0 << 90.0 << 135.0;
     QTest::newRow("Arc start 90 degree, angle 45 degree, radius 1500") << 1500.0 << 90.0 << 135.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radius -1500") << -1500.0 << 90.0 << 135.0;
     QTest::newRow("Arc start 90 degree, angle 45 degree, radius 50000") << 50000.0 << 90.0 << 135.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radius -50000") << -50000.0 << 90.0 << 135.0;
     QTest::newRow("Arc start 90 degree, angle 45 degree, radius 90000") << 90000.0 << 90.0 << 135.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radius -90000") << -90000.0 << 90.0 << 135.0;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -214,7 +300,7 @@ void TST_VArc::TestGetPoints()
         for (auto point : points)
         {
             QLineF rLine(static_cast<QPointF>(center), point);
-            const qreal value = qAbs(rLine.length() - radius);
+            const qreal value = qAbs(rLine.length() - qAbs(radius));
             // cppcheck-suppress unreadVariable
             const QString errorMsg = u"Broken the first rule. All points should be on the same distance from "
                                      u"the center. Error ='%1'."_s.arg(value);
@@ -227,11 +313,11 @@ void TST_VArc::TestGetPoints()
 
         if (VFuzzyComparePossibleNulls(arc.AngleArc(), 360.0))
         { // circle square
-            gSquare = M_PI * radius * radius;
+            gSquare = M_PI * qAbs(radius) * qAbs(radius);
         }
         else
         { // sector square
-            gSquare = (M_PI * radius * radius) / 360.0 * arc.AngleArc();
+            gSquare = (M_PI * qAbs(radius) * qAbs(radius)) / 360.0 * arc.AngleArc();
             points.append(static_cast<QPointF>(center));
         }
 
@@ -258,6 +344,7 @@ void TST_VArc::TestRotation_data()
     QTest::addColumn<QString>("prefix");
 
     QTest::newRow("Test arc 1") << QPointF(10, 10) << 10. << 0. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test arc 2") << QPointF(10, 10) << -10. << 0. << 90. << QPointF() << 90. << "_r";
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -277,6 +364,7 @@ void TST_VArc::TestRotation()
     QCOMPARE(arcOrigin.GetLength(), rotatedArc.GetLength());
     QCOMPARE(arcOrigin.AngleArc(), rotatedArc.AngleArc());
     QCOMPARE(arcOrigin.GetRadius(), rotatedArc.GetRadius());
+    QCOMPARE(arcOrigin.IsFlipped(), rotatedArc.IsFlipped());
     // cppcheck-suppress unreadVariable
     const QString errorMsg = u"The name doesn't contain the prefix '%1'."_s.arg(prefix);
     QVERIFY2(rotatedArc.name().endsWith(prefix), qUtf8Printable(errorMsg));
@@ -300,16 +388,20 @@ void TST_VArc::TestFlip_data()
 
     QLineF axis(QPointF(4, 6), QPointF(12, 6));
 
-    QTest::newRow("Vertical axis") << center << radius << QLineF(center, p1).angle() << QLineF(center, p2).angle()
-                                   << axis << "a2";
+    QTest::newRow("Vertical axis, positive radius")
+        << center << radius << QLineF(center, p1).angle() << QLineF(center, p2).angle() << axis << "a2";
+    QTest::newRow("Vertical axis, negative radius")
+        << center << -radius << QLineF(center, p1).angle() << QLineF(center, p2).angle() << axis << "a2";
 
     p1 = QPointF(15, 5);
     p2 = QPointF(10, 0);
 
     axis = QLineF(QPointF(9, -1), QPointF(9, 6));
 
-    QTest::newRow("Horizontal axis") << center << radius << QLineF(center, p1).angle() << QLineF(center, p2).angle()
-                                     << axis << "a2";
+    QTest::newRow("Horizontal axis, positive radius")
+        << center << radius << QLineF(center, p1).angle() << QLineF(center, p2).angle() << axis << "a2";
+    QTest::newRow("Horizontal axis, negative radius")
+        << center << -radius << QLineF(center, p1).angle() << QLineF(center, p2).angle() << axis << "a2";
 
     QLineF l(center.x(), center.y(), center.x() + radius, center.y());
 
@@ -326,8 +418,10 @@ void TST_VArc::TestFlip_data()
     axis = QLineF(p1Axis.x(), p1Axis.y(), p1Axis.x() + radius, p1Axis.y());
     axis.setAngle(45);
 
-    QTest::newRow("Diagonal axis") << center << radius << QLineF(center, p1).angle() << QLineF(center, p2).angle()
-                                   << axis << "a2";
+    QTest::newRow("Diagonal axis, positive radius")
+        << center << radius << QLineF(center, p1).angle() << QLineF(center, p2).angle() << axis << "a2";
+    QTest::newRow("Diagonal axis, negative radius")
+        << center << -radius << QLineF(center, p1).angle() << QLineF(center, p2).angle() << axis << "a2";
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -347,7 +441,7 @@ void TST_VArc::TestFlip()
     const QString errorMsg = u"The name doesn't contain the prefix '%1'."_s.arg(prefix);
     QVERIFY2(res.name().endsWith(prefix), qUtf8Printable(errorMsg));
 
-    QVERIFY2(res.IsFlipped(), qUtf8Printable("The arc is not flipped"));
+    QVERIFY2(res.IsFlipped() == radius > 0, qUtf8Printable("The arc is not flipped"));
 
     QCOMPARE(originArc.GetLength() * -1, res.GetLength());
     QCOMPARE(originArc.GetRadius(), res.GetRadius());
@@ -355,7 +449,7 @@ void TST_VArc::TestFlip()
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-void TST_VArc::TestCutArc_data()
+void TST_VArc::TestCutArcByLength_data()
 {
     QTest::addColumn<QPointF>("center");
     QTest::addColumn<qreal>("radius");
@@ -364,40 +458,65 @@ void TST_VArc::TestCutArc_data()
     QTest::addColumn<qreal>("cutLength");
     QTest::addColumn<QPointF>("cutPoint");
 
-    QPointF center(189.13625196850393, 344.1267401574803);
-    qreal radius = ToPixel(10, Unit::Cm);
-    qreal startAngle = 45.0;
-    qreal length = ToPixel(-10, Unit::Cm);
-    qreal cutLength = ToPixel(6, Unit::Cm);
+    const QPointF center(189.13625196850393, 344.1267401574803);
+    Q_RELAXED_CONSTEXPR qreal radius = ToPixel(10, Unit::Cm);
     QPointF cutPoint(539.3657292513009, 202.04366960088566);
+    Q_RELAXED_CONSTEXPR qreal length = ToPixel(10, Unit::Cm);
 
     // See file <root>/src/app/share/collection/bugs/Issue_#957.val
     QTest::newRow("Arc -10 cm length, cut length 6 cm")
-        << center << radius << startAngle << length << cutLength << cutPoint;
-
-    cutLength = ToPixel(-4, Unit::Cm);
+        << center << radius << 45.0 << -length << ToPixel(6, Unit::Cm) << cutPoint;
 
     // Opposite case
     QTest::newRow("Arc -10 cm length, cut length -4 cm")
-        << center << radius << startAngle << length << cutLength << cutPoint;
+        << center << radius << 45.0 << -length << ToPixel(-4, Unit::Cm) << cutPoint;
 
-    startAngle = 135;
-    length = ToPixel(10, Unit::Cm);
-    cutLength = ToPixel(-7, Unit::Cm);
     cutPoint = QPointF(-145.1588983496871, 167.78888781060192);
 
     // See file <root>/src/app/share/collection/bugs/Issue_#957.val
     QTest::newRow("Arc 10 cm length, cut length -7 cm")
-        << center << radius << startAngle << length << cutLength << cutPoint;
+        << center << radius << 135. << length << ToPixel(-7, Unit::Cm) << cutPoint;
 
     // Opposite case
-    cutLength = ToPixel(3, Unit::Cm);
     QTest::newRow("Arc 10 cm length, cut length 3 cm")
-        << center << radius << startAngle << length << cutLength << cutPoint;
+        << center << radius << 135. << length << ToPixel(3, Unit::Cm) << cutPoint;
+
+    QLineF l = QLineF(center, QPointF(center.x() + radius, center.y()));
+    l.setAngle(135);
+
+    QTest::newRow("Arc 10 cm length, cut length 0 cm") << center << radius << 135. << length << 0. << l.p2();
+
+    QTest::newRow("Arc 10 cm length (-10 cm radius), cut length 0 cm")
+        << center << -radius << 135. << length << 0. << l.p2();
+
+    QTest::newRow("Arc -10 cm length (-10 cm radius), cut length 0 cm")
+        << center << -radius << 135. << -length << 0. << l.p2();
+
+    QTest::newRow("Arc -10 cm length (10 cm radius), cut length 10 cm")
+        << center << radius << 135. << -length << length << l.p2();
+
+    QTest::newRow("Arc -10 cm length (-10 cm radius), cut length 10 cm")
+        << center << -radius << 135. << -length << length << l.p2();
+
+    const qreal arcAngle = qAbs(qRadiansToDegrees(ToPixel(10, Unit::Cm) / qAbs(radius)));
+    l = QLineF(center, QPointF(center.x() + radius, center.y()));
+    l.setAngle(135 + arcAngle);
+
+    QTest::newRow("Arc 10 cm length, cut length 10 cm")
+        << center << radius << 135. << length << ToPixel(10, Unit::Cm) << l.p2();
+
+    l = QLineF(center, QPointF(center.x() + radius, center.y()));
+    l.setAngle(135 - arcAngle);
+
+    QTest::newRow("Arc -10 cm length (10 cm radius), cut length -10 cm")
+        << center << radius << 135. << -length << -radius << l.p2();
+
+    QTest::newRow("Arc -10 cm length (-10 cm radius), cut length -10 cm")
+        << center << -radius << 135. << -length << -radius << l.p2();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-void TST_VArc::TestCutArc()
+void TST_VArc::TestCutArcByLength()
 {
     QFETCH(QPointF, center);
     QFETCH(qreal, radius);
diff --git a/src/test/ValentinaTest/tst_varc.h b/src/test/ValentinaTest/tst_varc.h
index 039643e29..11eb27ead 100644
--- a/src/test/ValentinaTest/tst_varc.h
+++ b/src/test/ValentinaTest/tst_varc.h
@@ -40,15 +40,16 @@ public:
 
 private slots:
     void CompareTwoWays();
-    void NegativeArc();
+    void ArcByLength_data();
+    void ArcByLength();
     void TestGetPoints_data();
     void TestGetPoints();
     void TestRotation_data();
     void TestRotation();
     void TestFlip_data();
     void TestFlip();
-    void TestCutArc_data();
-    void TestCutArc();
+    void TestCutArcByLength_data();
+    void TestCutArcByLength();
     void TestCurveIntersectAxis_data();
     void TestCurveIntersectAxis();
     void EmptyArc();
diff --git a/src/test/ValentinaTest/tst_vellipticalarc.cpp b/src/test/ValentinaTest/tst_vellipticalarc.cpp
index 2a05c41e3..e791dc06c 100644
--- a/src/test/ValentinaTest/tst_vellipticalarc.cpp
+++ b/src/test/ValentinaTest/tst_vellipticalarc.cpp
@@ -55,22 +55,85 @@ void TST_VEllipticalArc::CompareTwoWays_data()
     QTest::addColumn<qreal>("f2");
     QTest::addColumn<qreal>("rotationAngle");
 
-    QTest::newRow("Test case 1") << QPointF() << 100. << 200. << 0. << 90.0 << 0.;
-    QTest::newRow("Test case 2") << QPointF() << 100. << 200. << 0. << 180.0 << 0.;
-    QTest::newRow("Test case 3") << QPointF() << 100. << 200. << 0. << 270.0 << 0.;
-    QTest::newRow("Test case 4") << QPointF() << 100. << 200. << 0. << 360.0 << 0.;
-    QTest::newRow("Test case 5") << QPointF(10, 10) << 100. << 200. << 0. << 90.0 << 80.;
-    QTest::newRow("Test case 6") << QPointF(10, 10) << 100. << 200. << 0. << 180.0 << 80.;
-    QTest::newRow("Test case 7") << QPointF(10, 10) << 100. << 200. << 0. << 270.0 << 80.;
-    QTest::newRow("Test case 8") << QPointF(10, 10) << 100. << 200. << 0. << 360.0 << 80.;
-    QTest::newRow("Test case 9") << QPointF() << 100. << 200. << 0. << 90.0 << 80.;
-    QTest::newRow("Test case 10") << QPointF() << 100. << 200. << 0. << 180.0 << 80.;
-    QTest::newRow("Test case 11") << QPointF() << 100. << 200. << 0. << 270.0 << 80.;
-    QTest::newRow("Test case 12") << QPointF() << 100. << 200. << 0. << 360.0 << 80.;
-    QTest::newRow("Test case 13") << QPointF(10, 10) << 100. << 200. << 0. << 90.0 << 80.;
-    QTest::newRow("Test case 14") << QPointF(10, 10) << 100. << 200. << 0. << 180.0 << 80.;
-    QTest::newRow("Test case 15") << QPointF(10, 10) << 100. << 200. << 0. << 270.0 << 80.;
-    QTest::newRow("Test case 16") << QPointF(10, 10) << 100. << 200. << 0. << 360.0 << 80.;
+    QTest::newRow("Test case 1, +r, +r") << QPointF() << 100. << 200. << 0. << 90.0 << 0.;
+    QTest::newRow("Test case 1, -r, +r") << QPointF() << -100. << 200. << 0. << 90.0 << 0.;
+    QTest::newRow("Test case 1, +r, -r") << QPointF() << 100. << -200. << 0. << 90.0 << 0.;
+    QTest::newRow("Test case 1, -r, -r") << QPointF() << -100. << -200. << 0. << 90.0 << 0.;
+
+    QTest::newRow("Test case 2, +r, +r") << QPointF() << 100. << 200. << 0. << 180.0 << 0.;
+    QTest::newRow("Test case 2, -r, +r") << QPointF() << -100. << 200. << 0. << 180.0 << 0.;
+    QTest::newRow("Test case 2, +r, -r") << QPointF() << 100. << -200. << 0. << 180.0 << 0.;
+    QTest::newRow("Test case 2, -r, -r") << QPointF() << -100. << -200. << 0. << 180.0 << 0.;
+
+    QTest::newRow("Test case 3, +r, +r") << QPointF() << 100. << 200. << 0. << 270.0 << 0.;
+    QTest::newRow("Test case 3, -r, +r") << QPointF() << -100. << 200. << 0. << 270.0 << 0.;
+    QTest::newRow("Test case 3, +r, -r") << QPointF() << 100. << -200. << 0. << 270.0 << 0.;
+    QTest::newRow("Test case 3, -r, -r") << QPointF() << -100. << -200. << 0. << 270.0 << 0.;
+
+    QTest::newRow("Test case 4, +r, +r") << QPointF() << 100. << 200. << 0. << 360.0 << 0.;
+    QTest::newRow("Test case 4, -r, +r") << QPointF() << -100. << 200. << 0. << 360.0 << 0.;
+    QTest::newRow("Test case 4, +r, -r") << QPointF() << 100. << -200. << 0. << 360.0 << 0.;
+    QTest::newRow("Test case 4, -r, -r") << QPointF() << -100. << -200. << 0. << 360.0 << 0.;
+
+    QTest::newRow("Test case 5, +r, +r") << QPointF(10, 10) << 100. << 200. << 0. << 90.0 << 80.;
+    QTest::newRow("Test case 5, -r, +r") << QPointF(10, 10) << -100. << 200. << 0. << 90.0 << 80.;
+    QTest::newRow("Test case 5, +r, -r") << QPointF(10, 10) << 100. << -200. << 0. << 90.0 << 80.;
+    QTest::newRow("Test case 5, -r, -r") << QPointF(10, 10) << -100. << -200. << 0. << 90.0 << 80.;
+
+    QTest::newRow("Test case 6, +r, +r") << QPointF(10, 10) << 100. << 200. << 0. << 180.0 << 80.;
+    QTest::newRow("Test case 6, -r, +r") << QPointF(10, 10) << -100. << 200. << 0. << 180.0 << 80.;
+    QTest::newRow("Test case 6, +r, -r") << QPointF(10, 10) << 100. << -200. << 0. << 180.0 << 80.;
+    QTest::newRow("Test case 6, -r, -r") << QPointF(10, 10) << -100. << -200. << 0. << 180.0 << 80.;
+
+    QTest::newRow("Test case 7, +r, +r") << QPointF(10, 10) << 100. << 200. << 0. << 270.0 << 80.;
+    QTest::newRow("Test case 7, -r, +r") << QPointF(10, 10) << -100. << 200. << 0. << 270.0 << 80.;
+    QTest::newRow("Test case 7, +r, -r") << QPointF(10, 10) << 100. << -200. << 0. << 270.0 << 80.;
+    QTest::newRow("Test case 7, -r, -r") << QPointF(10, 10) << -100. << -200. << 0. << 270.0 << 80.;
+
+    QTest::newRow("Test case 8, +r, +r") << QPointF(10, 10) << 100. << 200. << 0. << 360.0 << 80.;
+    QTest::newRow("Test case 8, -r, +r") << QPointF(10, 10) << -100. << 200. << 0. << 360.0 << 80.;
+    QTest::newRow("Test case 8, +r, -r") << QPointF(10, 10) << 100. << -200. << 0. << 360.0 << 80.;
+    QTest::newRow("Test case 8, -r, -r") << QPointF(10, 10) << -100. << -200. << 0. << 360.0 << 80.;
+
+    QTest::newRow("Test case 9, +r, +r") << QPointF() << 100. << 200. << 0. << 90.0 << 80.;
+    QTest::newRow("Test case 9, -r, +r") << QPointF() << -100. << 200. << 0. << 90.0 << 80.;
+    QTest::newRow("Test case 9, +r, -r") << QPointF() << 100. << -200. << 0. << 90.0 << 80.;
+    QTest::newRow("Test case 9, -r, -r") << QPointF() << -100. << -200. << 0. << 90.0 << 80.;
+
+    QTest::newRow("Test case 10, +r, +r") << QPointF() << 100. << 200. << 0. << 180.0 << 80.;
+    QTest::newRow("Test case 10, -r, +r") << QPointF() << -100. << 200. << 0. << 180.0 << 80.;
+    QTest::newRow("Test case 10, +r, -r") << QPointF() << 100. << -200. << 0. << 180.0 << 80.;
+    QTest::newRow("Test case 10, -r, -r") << QPointF() << -100. << -200. << 0. << 180.0 << 80.;
+
+    QTest::newRow("Test case 11, +r, +r") << QPointF() << 100. << 200. << 0. << 270.0 << 80.;
+    QTest::newRow("Test case 11, -r, +r") << QPointF() << -100. << 200. << 0. << 270.0 << 80.;
+    QTest::newRow("Test case 11, +r, -r") << QPointF() << 100. << -200. << 0. << 270.0 << 80.;
+    QTest::newRow("Test case 11, -r, -r") << QPointF() << -100. << -200. << 0. << 270.0 << 80.;
+
+    QTest::newRow("Test case 12, +r, +r") << QPointF() << 100. << 200. << 0. << 360.0 << 80.;
+    QTest::newRow("Test case 12, -r, +r") << QPointF() << -100. << 200. << 0. << 360.0 << 80.;
+    QTest::newRow("Test case 12, +r, -r") << QPointF() << 100. << -200. << 0. << 360.0 << 80.;
+    QTest::newRow("Test case 12, -r, -r") << QPointF() << -100. << -200. << 0. << 360.0 << 80.;
+
+    QTest::newRow("Test case 13, +r, +r") << QPointF(10, 10) << 100. << 200. << 0. << 90.0 << 80.;
+    QTest::newRow("Test case 13, -r, +r") << QPointF(10, 10) << -100. << 200. << 0. << 90.0 << 80.;
+    QTest::newRow("Test case 13, +r, -r") << QPointF(10, 10) << 100. << -200. << 0. << 90.0 << 80.;
+    QTest::newRow("Test case 13, -r, -r") << QPointF(10, 10) << -100. << -200. << 0. << 90.0 << 80.;
+
+    QTest::newRow("Test case 14, +r, +r") << QPointF(10, 10) << 100. << 200. << 0. << 180.0 << 80.;
+    QTest::newRow("Test case 14, -r, +r") << QPointF(10, 10) << -100. << 200. << 0. << 180.0 << 80.;
+    QTest::newRow("Test case 14, +r, -r") << QPointF(10, 10) << 100. << -200. << 0. << 180.0 << 80.;
+    QTest::newRow("Test case 14, -r, -r") << QPointF(10, 10) << -100. << -200. << 0. << 180.0 << 80.;
+
+    QTest::newRow("Test case 15, +r, +r") << QPointF(10, 10) << 100. << 200. << 0. << 270.0 << 80.;
+    QTest::newRow("Test case 15, -r, +r") << QPointF(10, 10) << -100. << 200. << 0. << 270.0 << 80.;
+    QTest::newRow("Test case 15, +r, -r") << QPointF(10, 10) << 100. << -200. << 0. << 270.0 << 80.;
+    QTest::newRow("Test case 15, -r, -r") << QPointF(10, 10) << -100. << -200. << 0. << 270.0 << 80.;
+
+    QTest::newRow("Test case 16, +r, +r") << QPointF(10, 10) << 100. << 200. << 0. << 360.0 << 80.;
+    QTest::newRow("Test case 16, -r, +r") << QPointF(10, 10) << -100. << 200. << 0. << 360.0 << 80.;
+    QTest::newRow("Test case 16, +r, -r") << QPointF(10, 10) << 100. << -200. << 0. << 360.0 << 80.;
+    QTest::newRow("Test case 16, -r, -r") << QPointF(10, 10) << -100. << -200. << 0. << 360.0 << 80.;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -91,7 +154,7 @@ void TST_VEllipticalArc::CompareTwoWays()
 
     VEllipticalArc arc2(length, center, radius1, radius2, f1, rotationAngle);
 
-    const qreal lengthEps = ToPixel(0.45, Unit::Mm); // computing error
+    Q_RELAXED_CONSTEXPR qreal lengthEps = ToPixel(0.45, Unit::Mm); // computing error
 
     // cppcheck-suppress unreadVariable
     QString errorLengthMsg = u"Difference between real and computing lengthes bigger than eps = %1. l1 = %2; l2 = %3"_s;
@@ -111,30 +174,57 @@ void TST_VEllipticalArc::CompareTwoWays()
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-// cppcheck-suppress unusedFunction
-void TST_VEllipticalArc::NegativeArc()
+void TST_VEllipticalArc::ArcByLength_data()
 {
+    QTest::addColumn<qreal>("radius1");
+    QTest::addColumn<qreal>("radius2");
+    QTest::addColumn<qreal>("f1");
+    QTest::addColumn<qreal>("f2");
+    QTest::addColumn<qreal>("rotationAngle");
+    QTest::addColumn<bool>("flipped");
+    QTest::addColumn<int>("direction");
+
+    QTest::newRow("+r, +r, +length") << 100. << 200. << 1. << 181. << 0. << false << 1;
+    QTest::newRow("+r, +r, -length") << 100. << 200. << 1. << 181. << 0. << true << -1;
+    QTest::newRow("-r, +r, +length") << -100. << 200. << 1. << 181. << 0. << true << -1;
+    QTest::newRow("-r, +r, -length") << -100. << 200. << 1. << 181. << 0. << true << -1;
+    QTest::newRow("+r, -r, +length") << 100. << -200. << 1. << 181. << 0. << true << -1;
+    QTest::newRow("+r, -r, -length") << 100. << -200. << 1. << 181. << 0. << true << -1;
+    QTest::newRow("-r, -r, +length") << -100. << -200. << 1. << 181. << 0. << true << -1;
+    QTest::newRow("-r, -r, -length") << -100. << -200. << 1. << 181. << 0. << true << -1;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void TST_VEllipticalArc::ArcByLength()
+{
+    QFETCH(qreal, radius1);
+    QFETCH(qreal, radius2);
+    QFETCH(qreal, f1);
+    QFETCH(qreal, f2);
+    QFETCH(qreal, rotationAngle);
+    QFETCH(bool, flipped);
+    QFETCH(int, direction);
+
     const VPointF center;
-    const qreal radius1 = 100;
-    const qreal radius2 = 200;
-    const qreal f1 = 1;
-    const qreal f2 = 181;
-    const qreal rotationAngle = 0;
 
     // Full ellipse
-    const qreal h = ((radius1 - radius2) * (radius1 - radius2)) / ((radius1 + radius2) * (radius1 + radius2));
-    const qreal length = M_PI * (radius1 + radius2) * (1 + 3 * h / (10 + qSqrt(4 - 3 * h))) / 2;
-    VEllipticalArc arc(-length, center, radius1, radius2, f1, rotationAngle);
+    const qreal h = ((qAbs(radius1) - qAbs(radius2)) * (qAbs(radius1) - qAbs(radius2))) /
+                    ((qAbs(radius1) + qAbs(radius2)) * (qAbs(radius1) + qAbs(radius2)));
+    const qreal length =
+        (M_PI * (qAbs(radius1) + qAbs(radius2)) * (1 + 3 * h / (10 + qSqrt(4 - 3 * h))) / 2) * direction;
+    VEllipticalArc arc(length, center, radius1, radius2, f1, rotationAngle);
 
-    const qreal eps = ToPixel(0.45, Unit::Mm); // computing error
+    Q_RELAXED_CONSTEXPR qreal eps = ToPixel(0.45, Unit::Mm); // computing error
     // cppcheck-suppress unreadVariable
     const QString errorMsg =
-        u"Difference between real and computing lengthes bigger than eps = %1.  v1 = %2; v2 = %3"_s;
+        QStringLiteral("Difference between real and computing lengthes bigger than eps = %1.  v1 = %2; v2 = %3");
 
-    QVERIFY2(qAbs(arc.GetLength() + length) <= eps, qUtf8Printable(errorMsg.arg(eps).arg(arc.GetLength()).arg(length)));
+    QVERIFY2(qAbs(arc.GetLength() - length) <= eps, qUtf8Printable(errorMsg.arg(eps).arg(arc.GetLength()).arg(length)));
 
     const qreal angleEps = 0.4;
     QVERIFY2(arc.GetEndAngle() - f2 <= angleEps, qUtf8Printable(errorMsg.arg(eps).arg(arc.GetEndAngle()).arg(f2)));
+
+    QCOMPARE(arc.IsFlipped(), flipped);
 }
 
 // cppcheck-suppress unusedFunction
@@ -172,106 +262,445 @@ void TST_VEllipticalArc::TestData()
     QTest::addColumn<qreal>("rotationAngle");
 
     QTest::newRow("Full circle: radiuses 10, 20; start 0") << 10.0 << 20.0 << 0.0 << 360.0 << 0.0;
+    QTest::newRow("Full circle: radiuses -10, 20; start 0") << -10.0 << 20.0 << 0.0 << 360.0 << 0.0;
+    QTest::newRow("Full circle: radiuses 10, -20; start 0") << 10.0 << -20.0 << 0.0 << 360.0 << 0.0;
+    QTest::newRow("Full circle: radiuses -10, -20; start 0") << -10.0 << -20.0 << 0.0 << 360.0 << 0.0;
+
     QTest::newRow("Full circle: radiuses 150, 200; start 0") << 150.0 << 200.0 << 0.0 << 360.0 << 0.0;
+    QTest::newRow("Full circle: radiuses -150, 200; start 0") << -150.0 << 200.0 << 0.0 << 360.0 << 0.0;
+    QTest::newRow("Full circle: radiuses 150, -200; start 0") << 150.0 << -200.0 << 0.0 << 360.0 << 0.0;
+    QTest::newRow("Full circle: radiuses -150, -200; start 0") << -150.0 << -200.0 << 0.0 << 360.0 << 0.0;
+
     QTest::newRow("Full circle: radiuses 150, 200, rotation 30; start 0") << 150.0 << 200.0 << 0.0 << 360.0 << 30.0;
+    QTest::newRow("Full circle: radiuses -150, 200, rotation 30; start 0") << -150.0 << 200.0 << 0.0 << 360.0 << 30.0;
+    QTest::newRow("Full circle: radiuses 150, -200, rotation 30; start 0") << 150.0 << -200.0 << 0.0 << 360.0 << 30.0;
+    QTest::newRow("Full circle: radiuses -150, -200, rotation 30; start 0") << -150.0 << -200.0 << 0.0 << 360.0 << 30.0;
+
     QTest::newRow("Full circle: radiuses 1500, 1000; start 0") << 1500.0 << 1000.0 << 0.0 << 360.0 << 0.0;
+    QTest::newRow("Full circle: radiuses -1500, 1000; start 0") << -1500.0 << 1000.0 << 0.0 << 360.0 << 0.0;
+    QTest::newRow("Full circle: radiuses 1500, -1000; start 0") << 1500.0 << -1000.0 << 0.0 << 360.0 << 0.0;
+    QTest::newRow("Full circle: radiuses -1500, -1000; start 0") << -1500.0 << -1000.0 << 0.0 << 360.0 << 0.0;
+
     QTest::newRow("Full circle: radiuses 1500, 1000, rotation 50; start 0") << 1500.0 << 1000.0 << 0.0 << 360.0 << 50.0;
+    QTest::newRow("Full circle: radiuses -1500, 1000, rotation 50; start 0")
+        << -1500.0 << 1000.0 << 0.0 << 360.0 << 50.0;
+    QTest::newRow("Full circle: radiuses 1500, -1000, rotation 50; start 0")
+        << 1500.0 << -1000.0 << 0.0 << 360.0 << 50.0;
+    QTest::newRow("Full circle: radiuses -1500, -1000, rotation 50; start 0")
+        << -1500.0 << -1000.0 << 0.0 << 360.0 << 50.0;
+
     QTest::newRow("Full circle: radiuses 15000, 10000, rotation 90; start 0")
         << 15000.0 << 10000.0 << 0.0 << 360.0 << 90.0;
+    QTest::newRow("Full circle: radiuses -15000, 10000, rotation 90; start 0")
+        << -15000.0 << 10000.0 << 0.0 << 360.0 << 90.0;
+    QTest::newRow("Full circle: radiuses 15000, -10000, rotation 90; start 0")
+        << 15000.0 << -10000.0 << 0.0 << 360.0 << 90.0;
+    QTest::newRow("Full circle: radiuses -15000, -10000, rotation 90; start 0")
+        << -15000.0 << -10000.0 << 0.0 << 360.0 << 90.0;
 
     QTest::newRow("Full circle: radiuses 10, 20; start 90") << 10.0 << 20.0 << 90.0 << 90.0 << 0.0;
+    QTest::newRow("Full circle: radiuses -10, 20; start 90") << -10.0 << 20.0 << 90.0 << 90.0 << 0.0;
+    QTest::newRow("Full circle: radiuses 10, -20; start 90") << 10.0 << -20.0 << 90.0 << 90.0 << 0.0;
+    QTest::newRow("Full circle: radiuses -10, -20; start 90") << -10.0 << -20.0 << 90.0 << 90.0 << 0.0;
+
     QTest::newRow("Full circle: radiuses 150, 200; start 90") << 150.0 << 200.0 << 90.0 << 90.0 << 0.0;
+    QTest::newRow("Full circle: radiuses -150, 200; start 90") << -150.0 << 200.0 << 90.0 << 90.0 << 0.0;
+    QTest::newRow("Full circle: radiuses 150, -200; start 90") << 150.0 << -200.0 << 90.0 << 90.0 << 0.0;
+    QTest::newRow("Full circle: radiuses -150, -200; start 90") << -150.0 << -200.0 << 90.0 << 90.0 << 0.0;
+
     QTest::newRow("Full circle: radiuses 150, 200, rotation 30; start 90") << 150.0 << 200.0 << 90.0 << 90.0 << 30.0;
+    QTest::newRow("Full circle: radiuses -150, 200, rotation 30; start 90") << -150.0 << 200.0 << 90.0 << 90.0 << 30.0;
+    QTest::newRow("Full circle: radiuses 150, -200, rotation 30; start 90") << 150.0 << -200.0 << 90.0 << 90.0 << 30.0;
+    QTest::newRow("Full circle: radiuses -150, -200, rotation 30; start 90")
+        << -150.0 << -200.0 << 90.0 << 90.0 << 30.0;
+
     QTest::newRow("Full circle: radiuses 1500, 1000; start 90") << 1500.0 << 1000.0 << 90.0 << 90.0 << 0.0;
+    QTest::newRow("Full circle: radiuses -1500, 1000; start 90") << 1500.0 << -1000.0 << 90.0 << 90.0 << 0.0;
+    QTest::newRow("Full circle: radiuses 1500, -1000; start 90") << 1500.0 << -1000.0 << 90.0 << 90.0 << 0.0;
+    QTest::newRow("Full circle: radiuses -1500, -1000; start 90") << -1500.0 << -1000.0 << 90.0 << 90.0 << 0.0;
+
     QTest::newRow("Full circle: radiuses 1500, 1000, rotation 50; start 90")
         << 1500.0 << 1000.0 << 90.0 << 90.0 << 50.0;
+    QTest::newRow("Full circle: radiuses 1500, 1000, rotation 50; start 90")
+        << 1500.0 << 1000.0 << 90.0 << 90.0 << 50.0;
+    QTest::newRow("Full circle: radiuses 1500, 1000, rotation 50; start 90")
+        << 1500.0 << 1000.0 << 90.0 << 90.0 << 50.0;
+    QTest::newRow("Full circle: radiuses 1500, 1000, rotation 50; start 90")
+        << 1500.0 << 1000.0 << 90.0 << 90.0 << 50.0;
+
     QTest::newRow("Full circle: radiuses 15000, 10000, rotation 90; start 90")
         << 15000.0 << 10000.0 << 90.0 << 90.0 << 90.0;
+    QTest::newRow("Full circle: radiuses -15000, 10000, rotation 90; start 90")
+        << -15000.0 << 10000.0 << 90.0 << 90.0 << 90.0;
+    QTest::newRow("Full circle: radiuses 15000, -10000, rotation 90; start 90")
+        << 15000.0 << -10000.0 << 90.0 << 90.0 << 90.0;
+    QTest::newRow("Full circle: radiuses -15000, -10000, rotation 90; start 90")
+        << -15000.0 << -10000.0 << 90.0 << 90.0 << 90.0;
 
     QTest::newRow("Arc less than 45 degree, radiuses 100, 50") << 100.0 << 50.0 << 0.0 << 10.5 << 0.0;
+    QTest::newRow("Arc less than 45 degree, radiuses -100, 50") << -100.0 << 50.0 << 0.0 << 10.5 << 0.0;
+    QTest::newRow("Arc less than 45 degree, radiuses 100, -50") << 100.0 << -50.0 << 0.0 << 10.5 << 0.0;
+    QTest::newRow("Arc less than 45 degree, radiuses -100, -50") << -100.0 << -50.0 << 0.0 << 10.5 << 0.0;
+
     QTest::newRow("Arc less than 45 degree, radiuses 150, 50, rotation 180") << 150.0 << 50.0 << 0.0 << 10.5 << 180.0;
+    QTest::newRow("Arc less than 45 degree, radiuses -150, 50, rotation 180") << -150.0 << 50.0 << 0.0 << 10.5 << 180.0;
+    QTest::newRow("Arc less than 45 degree, radiuses 150, -50, rotation 180") << 150.0 << -50.0 << 0.0 << 10.5 << 180.0;
+    QTest::newRow("Arc less than 45 degree, radiuses -150, -50, rotation 180")
+        << -150.0 << -50.0 << 0.0 << 10.5 << 180.0;
+
     QTest::newRow("Arc less than 45 degree, radiuses 1500, 800, rotation 90") << 1500.0 << 800.0 << 0.0 << 10.5 << 90.0;
-    QTest::newRow("Arc less than 45 degree, radiuses 15000, 10000, rotation 40")
+    QTest::newRow("Arc less than 45 degree, radiuses -1500, 800, rotation 90")
+        << -1500.0 << 800.0 << 0.0 << 10.5 << 90.0;
+    QTest::newRow("Arc less than 45 degree, radiuses 1500, -800, rotation 90")
+        << 1500.0 << -800.0 << 0.0 << 10.5 << 90.0;
+    QTest::newRow("Arc less than 45 degree, radiuses -1500, -800, rotation 90")
+        << -1500.0 << -800.0 << 0.0 << 10.5 << 90.0;
+
+    QTest::newRow("Arc less than 45 degree, radiuses 50000, 10000, rotation 40")
         << 50000.0 << 10000.0 << 0.0 << 10.5 << 40.0;
+    QTest::newRow("Arc less than 45 degree, radiuses -50000, 10000, rotation 40")
+        << 50000.0 << 10000.0 << 0.0 << 10.5 << 40.0;
+    QTest::newRow("Arc less than 45 degree, radiuses 50000, -10000, rotation 40")
+        << 50000.0 << 10000.0 << 0.0 << 10.5 << 40.0;
+    QTest::newRow("Arc less than 45 degree, radiuses -50000, -10000, rotation 40")
+        << -50000.0 << -10000.0 << 0.0 << 10.5 << 40.0;
+
     QTest::newRow("Arc less than 45 degree, radiuses 15000, 10000") << 15000.0 << 10000.0 << 0.0 << 10.5 << 0.0;
+    QTest::newRow("Arc less than 45 degree, radiuses -15000, 10000") << -15000.0 << 10000.0 << 0.0 << 10.5 << 0.0;
+    QTest::newRow("Arc less than 45 degree, radiuses 15000, -10000") << 15000.0 << -10000.0 << 0.0 << 10.5 << 0.0;
+    QTest::newRow("Arc less than 45 degree, radiuses -15000, -10000") << -15000.0 << -10000.0 << 0.0 << 10.5 << 0.0;
 
     QTest::newRow("Arc 45 degree, radiuses 100, 50, rotation 45") << 100.0 << 50.0 << 0.0 << 45.0 << 45.0;
+    QTest::newRow("Arc 45 degree, radiuses -100, 50, rotation 45") << -100.0 << 50.0 << 0.0 << 45.0 << 45.0;
+    QTest::newRow("Arc 45 degree, radiuses 100, -50, rotation 45") << 100.0 << -50.0 << 0.0 << 45.0 << 45.0;
+    QTest::newRow("Arc 45 degree, radiuses -100, -50, rotation 45") << -100.0 << -50.0 << 0.0 << 45.0 << 45.0;
+
     QTest::newRow("Arc 45 degree, radiuses 150, 15, rotation 30") << 150.0 << 15.0 << 0.0 << 45.0 << 30.0;
+    QTest::newRow("Arc 45 degree, radiuses -150, 15, rotation 30") << -150.0 << 15.0 << 0.0 << 45.0 << 30.0;
+    QTest::newRow("Arc 45 degree, radiuses 150, -15, rotation 30") << 150.0 << -15.0 << 0.0 << 45.0 << 30.0;
+    QTest::newRow("Arc 45 degree, radiuses -150, -15, rotation 30") << -150.0 << -15.0 << 0.0 << 45.0 << 30.0;
+
     QTest::newRow("Arc 45 degree, radiuses 1500, 150, rotation 45") << 1500.0 << 150.0 << 0.0 << 45.0 << 45.0;
+    QTest::newRow("Arc 45 degree, radiuses -1500, 150, rotation 45") << -1500.0 << 150.0 << 0.0 << 45.0 << 45.0;
+    QTest::newRow("Arc 45 degree, radiuses 1500, -150, rotation 45") << 1500.0 << -150.0 << 0.0 << 45.0 << 45.0;
+    QTest::newRow("Arc 45 degree, radiuses -1500, -150, rotation 45") << -1500.0 << -150.0 << 0.0 << 45.0 << 45.0;
+
     QTest::newRow("Arc 45 degree, radiuses 15000, 15000") << 15000.0 << 15000.0 << 0.0 << 45.0 << 0.0;
+    QTest::newRow("Arc 45 degree, radiuses -15000, 15000") << -15000.0 << 15000.0 << 0.0 << 45.0 << 0.0;
+    QTest::newRow("Arc 45 degree, radiuses 15000, -15000") << 15000.0 << -15000.0 << 0.0 << 45.0 << 0.0;
+    QTest::newRow("Arc 45 degree, radiuses -15000, -15000") << -15000.0 << -15000.0 << 0.0 << 45.0 << 0.0;
+
     QTest::newRow("Arc 45 degree, radiuses 15000, 10000, rotation 270") << 15000.0 << 10000.0 << 0.0 << 45.0 << 270.0;
+    QTest::newRow("Arc 45 degree, radiuses -15000, 10000, rotation 270") << -15000.0 << 10000.0 << 0.0 << 45.0 << 270.0;
+    QTest::newRow("Arc 45 degree, radiuses 15000, -10000, rotation 270") << 15000.0 << -10000.0 << 0.0 << 45.0 << 270.0;
+    QTest::newRow("Arc 45 degree, radiuses -15000, -10000, rotation 270")
+        << -15000.0 << -10000.0 << 0.0 << 45.0 << 270.0;
 
     QTest::newRow("Arc less than 90 degree, radiuses 100, 400, rotation 50") << 100.0 << 400.0 << 0.0 << 75.0 << 50.0;
+    QTest::newRow("Arc less than 90 degree, radiuses -100, 400, rotation 50") << -100.0 << 400.0 << 0.0 << 75.0 << 50.0;
+    QTest::newRow("Arc less than 90 degree, radiuses 100, -400, rotation 50") << 100.0 << -400.0 << 0.0 << 75.0 << 50.0;
+    QTest::newRow("Arc less than 90 degree, radiuses -100, -400, rotation 50")
+        << -100.0 << -400.0 << 0.0 << 75.0 << 50.0;
+
     QTest::newRow("Arc less than 90 degree, radiuses 150, 400, rotation 90") << 150.0 << 400.0 << 0.0 << 75.0 << 90.0;
+    QTest::newRow("Arc less than 90 degree, radiuses -150, 400, rotation 90") << -150.0 << 400.0 << 0.0 << 75.0 << 90.0;
+    QTest::newRow("Arc less than 90 degree, radiuses 150, -400, rotation 90") << 150.0 << -400.0 << 0.0 << 75.0 << 90.0;
+    QTest::newRow("Arc less than 90 degree, radiuses -150, -400, rotation 90")
+        << -150.0 << -400.0 << 0.0 << 75.0 << 90.0;
+
     QTest::newRow("Arc less than 90 degree, radiuses 1500, 50000, rotation 180")
         << 1500.0 << 50000.0 << 0.0 << 75.0 << 180.0;
+    QTest::newRow("Arc less than 90 degree, radiuses -1500, 50000, rotation 180")
+        << -1500.0 << 50000.0 << 0.0 << 75.0 << 180.0;
+    QTest::newRow("Arc less than 90 degree, radiuses 1500, -50000, rotation 180")
+        << 1500.0 << -50000.0 << 0.0 << 75.0 << 180.0;
+    QTest::newRow("Arc less than 90 degree, radiuses -1500, -50000, rotation 180")
+        << -1500.0 << -50000.0 << 0.0 << 75.0 << 180.0;
+
     QTest::newRow("Arc less than 90 degree, radiuses 50000, 5000, rotation 30")
         << 50000.0 << 5000.0 << 0.0 << 75.0 << 30.0;
+    QTest::newRow("Arc less than 90 degree, radiuses -50000, 5000, rotation 30")
+        << -50000.0 << 5000.0 << 0.0 << 75.0 << 30.0;
+    QTest::newRow("Arc less than 90 degree, radiuses 50000, -5000, rotation 30")
+        << 50000.0 << -5000.0 << 0.0 << 75.0 << 30.0;
+    QTest::newRow("Arc less than 90 degree, radiuses -50000, -5000, rotation 30")
+        << -50000.0 << -5000.0 << 0.0 << 75.0 << 30.0;
+
     QTest::newRow("Arc less than 90 degree, radiuses 90000, 50000, rotation 30")
         << 90000.0 << 50000.0 << 0.0 << 75.0 << 30.0;
+    QTest::newRow("Arc less than 90 degree, radiuses -90000, 50000, rotation 30")
+        << -90000.0 << 50000.0 << 0.0 << 75.0 << 30.0;
+    QTest::newRow("Arc less than 90 degree, radiuses 90000, -50000, rotation 30")
+        << 90000.0 << -50000.0 << 0.0 << 75.0 << 30.0;
+    QTest::newRow("Arc less than 90 degree, radiuses -90000, -50000, rotation 30")
+        << -90000.0 << -50000.0 << 0.0 << 75.0 << 30.0;
 
     QTest::newRow("Arc 90 degree, radiuses 100, 50, rotation 30") << 100.0 << 50.0 << 0.0 << 90.0 << 30.0;
+    QTest::newRow("Arc 90 degree, radiuses -100, 50, rotation 30") << -100.0 << 50.0 << 0.0 << 90.0 << 30.0;
+    QTest::newRow("Arc 90 degree, radiuses 100, -50, rotation 30") << 100.0 << -50.0 << 0.0 << 90.0 << 30.0;
+    QTest::newRow("Arc 90 degree, radiuses -100, -50, rotation 30") << -100.0 << -50.0 << 0.0 << 90.0 << 30.0;
+
     QTest::newRow("Arc 90 degree, radiuses 150, 400") << 150.0 << 400.0 << 0.0 << 90.0 << 0.0;
+    QTest::newRow("Arc 90 degree, radiuses -150, 400") << -150.0 << 400.0 << 0.0 << 90.0 << 0.0;
+    QTest::newRow("Arc 90 degree, radiuses 150, -400") << 150.0 << -400.0 << 0.0 << 90.0 << 0.0;
+    QTest::newRow("Arc 90 degree, radiuses -150, -400") << -150.0 << -400.0 << 0.0 << 90.0 << 0.0;
+
     QTest::newRow("Arc 90 degree, radiuses 1500, 800, rotation 70") << 1500.0 << 800.0 << 0.0 << 90.0 << 70.0;
-    QTest::newRow("Arc 90 degree, radiuses 15000, 5000, rotation 30") << 15000.0 << 1500.0 << 0.0 << 90.0 << 30.0;
+    QTest::newRow("Arc 90 degree, radiuses -1500, 800, rotation 70") << -1500.0 << 800.0 << 0.0 << 90.0 << 70.0;
+    QTest::newRow("Arc 90 degree, radiuses 1500, -800, rotation 70") << 1500.0 << -800.0 << 0.0 << 90.0 << 70.0;
+    QTest::newRow("Arc 90 degree, radiuses -1500, -800, rotation 70") << -1500.0 << -800.0 << 0.0 << 90.0 << 70.0;
+
+    QTest::newRow("Arc 90 degree, radiuses 15000, 1500, rotation 30") << 15000.0 << 1500.0 << 0.0 << 90.0 << 30.0;
+    QTest::newRow("Arc 90 degree, radiuses -15000, 1500, rotation 30") << -15000.0 << 1500.0 << 0.0 << 90.0 << 30.0;
+    QTest::newRow("Arc 90 degree, radiuses 15000, -1500, rotation 30") << 15000.0 << -1500.0 << 0.0 << 90.0 << 30.0;
+    QTest::newRow("Arc 90 degree, radiuses -15000, -1500, rotation 30") << -15000.0 << -1500.0 << 0.0 << 90.0 << 30.0;
+
     QTest::newRow("Arc 90 degree, radiuses 15000, 14000, rotation 235") << 15000.0 << 14000.0 << 0.0 << 90.0 << 235.0;
+    QTest::newRow("Arc 90 degree, radiuses -15000, 14000, rotation 235") << -15000.0 << 14000.0 << 0.0 << 90.0 << 235.0;
+    QTest::newRow("Arc 90 degree, radiuses 15000, -14000, rotation 235") << 15000.0 << -14000.0 << 0.0 << 90.0 << 235.0;
+    QTest::newRow("Arc 90 degree, radiuses -15000, -14000, rotation 235")
+        << -15000.0 << -14000.0 << 0.0 << 90.0 << 235.0;
 
     QTest::newRow("Arc less than 135 degree, radiuses 100, 50, rotation 60") << 100.0 << 50.0 << 0.0 << 110.6 << 60.0;
+    QTest::newRow("Arc less than 135 degree, radiuses -100, 50, rotation 60") << -100.0 << 50.0 << 0.0 << 110.6 << 60.0;
+    QTest::newRow("Arc less than 135 degree, radiuses 100, -50, rotation 60") << 100.0 << -50.0 << 0.0 << 110.6 << 60.0;
+    QTest::newRow("Arc less than 135 degree, radiuses -100, -50, rotation 60")
+        << -100.0 << -50.0 << 0.0 << 110.6 << 60.0;
+
     QTest::newRow("Arc less than 135 degree, radiuses 150, 400, rotation 300")
         << 150.0 << 400.0 << 0.0 << 110.6 << 300.0;
+    QTest::newRow("Arc less than 135 degree, radiuses -150, 400, rotation 300")
+        << -150.0 << 400.0 << 0.0 << 110.6 << 300.0;
+    QTest::newRow("Arc less than 135 degree, radiuses 150, -400, rotation 300")
+        << 150.0 << -400.0 << 0.0 << 110.6 << 300.0;
+    QTest::newRow("Arc less than 135 degree, radiuses -150, -400, rotation 300")
+        << -150.0 << -400.0 << 0.0 << 110.6 << 300.0;
+
     QTest::newRow("Arc less than 135 degree, radiuses 1500, 800, rotation 360")
         << 1500.0 << 800.0 << 0.0 << 110.6 << 360.0;
+    QTest::newRow("Arc less than 135 degree, radiuses -1500, 800, rotation 360")
+        << -1500.0 << 800.0 << 0.0 << 110.6 << 360.0;
+    QTest::newRow("Arc less than 135 degree, radiuses 1500, -800, rotation 360")
+        << 1500.0 << -800.0 << 0.0 << 110.6 << 360.0;
+    QTest::newRow("Arc less than 135 degree, radiuses -1500, -800, rotation 360")
+        << -1500.0 << -800.0 << 0.0 << 110.6 << 360.0;
+
     QTest::newRow("Arc less than 135 degree, radiuses 15000, 1500, rotation 290")
         << 15000.0 << 1500.0 << 0.0 << 110.6 << 290.0;
+    QTest::newRow("Arc less than 135 degree, radiuses -15000, 1500, rotation 290")
+        << -15000.0 << 1500.0 << 0.0 << 110.6 << 290.0;
+    QTest::newRow("Arc less than 135 degree, radiuses 15000, -1500, rotation 290")
+        << 15000.0 << -1500.0 << 0.0 << 110.6 << 290.0;
+    QTest::newRow("Arc less than 135 degree, radiuses -15000, -1500, rotation 290")
+        << -15000.0 << -1500.0 << 0.0 << 110.6 << 290.0;
+
     QTest::newRow("Arc less than 135 degree, radiuses 15000, 1500") << 15000.0 << 1500.0 << 0.0 << 110.6 << 0.0;
+    QTest::newRow("Arc less than 135 degree, radiuses -15000, 1500") << -15000.0 << 1500.0 << 0.0 << 110.6 << 0.0;
+    QTest::newRow("Arc less than 135 degree, radiuses 15000, -1500") << 15000.0 << -1500.0 << 0.0 << 110.6 << 0.0;
+    QTest::newRow("Arc less than 135 degree, radiuses -15000, -1500") << -15000.0 << -1500.0 << 0.0 << 110.6 << 0.0;
 
     QTest::newRow("Arc 135 degree, radiuses 100, 50") << 100.0 << 50.0 << 0.0 << 135.0 << 0.0;
+    QTest::newRow("Arc 135 degree, radiuses -100, 50") << -100.0 << 50.0 << 0.0 << 135.0 << 0.0;
+    QTest::newRow("Arc 135 degree, radiuses 100, -50") << 100.0 << -50.0 << 0.0 << 135.0 << 0.0;
+    QTest::newRow("Arc 135 degree, radiuses -100, -50") << -100.0 << -50.0 << 0.0 << 135.0 << 0.0;
+
     QTest::newRow("Arc 135 degree, radiuses 150, 400") << 150.0 << 400.0 << 0.0 << 135.0 << 0.0;
+    QTest::newRow("Arc 135 degree, radiuses -150, 400") << -150.0 << 400.0 << 0.0 << 135.0 << 0.0;
+    QTest::newRow("Arc 135 degree, radiuses 150, -400") << 150.0 << -400.0 << 0.0 << 135.0 << 0.0;
+    QTest::newRow("Arc 135 degree, radiuses -150, -400") << -150.0 << -400.0 << 0.0 << 135.0 << 0.0;
+
     QTest::newRow("Arc 135 degree, radiuses 1500, 800") << 1500.0 << 800.0 << 0.0 << 135.0 << 0.0;
+    QTest::newRow("Arc 135 degree, radiuses -1500, 800") << -1500.0 << 800.0 << 0.0 << 135.0 << 0.0;
+    QTest::newRow("Arc 135 degree, radiuses 1500, -800") << 1500.0 << -800.0 << 0.0 << 135.0 << 0.0;
+    QTest::newRow("Arc 135 degree, radiuses -1500, -800") << -1500.0 << -800.0 << 0.0 << 135.0 << 0.0;
+
     QTest::newRow("Arc 135 degree, radiuses 15000, 1500, rotation 20") << 15000.0 << 1500.0 << 0.0 << 135.0 << 20.0;
+    QTest::newRow("Arc 135 degree, radiuses -15000, 1500, rotation 20") << -15000.0 << 1500.0 << 0.0 << 135.0 << 20.0;
+    QTest::newRow("Arc 135 degree, radiuses 15000, -1500, rotation 20") << 15000.0 << -1500.0 << 0.0 << 135.0 << 20.0;
+    QTest::newRow("Arc 135 degree, radiuses -15000, -1500, rotation 20") << -15000.0 << -1500.0 << 0.0 << 135.0 << 20.0;
+
     QTest::newRow("Arc 135 degree, radiuses 15000, 10000") << 15000.0 << 10000.0 << 0.0 << 135.0 << 0.0;
+    QTest::newRow("Arc 135 degree, radiuses -15000, 10000") << -15000.0 << 10000.0 << 0.0 << 135.0 << 0.0;
+    QTest::newRow("Arc 135 degree, radiuses 15000, -10000") << 15000.0 << -10000.0 << 0.0 << 135.0 << 0.0;
+    QTest::newRow("Arc 135 degree, radiuses -15000, -10000") << -15000.0 << -10000.0 << 0.0 << 135.0 << 0.0;
 
     QTest::newRow("Arc less than 180 degree, radiuses 100, 50") << 100.0 << 50.0 << 0.0 << 160.7 << 0.0;
+    QTest::newRow("Arc less than 180 degree, radiuses -100, 50") << -100.0 << 50.0 << 0.0 << 160.7 << 0.0;
+    QTest::newRow("Arc less than 180 degree, radiuses 100, -50") << 100.0 << -50.0 << 0.0 << 160.7 << 0.0;
+    QTest::newRow("Arc less than 180 degree, radiuses -100, -50") << -100.0 << -50.0 << 0.0 << 160.7 << 0.0;
+
     QTest::newRow("Arc less than 180 degree, radiuses 150, 400") << 150.0 << 400.0 << 0.0 << 160.7 << 0.0;
+    QTest::newRow("Arc less than 180 degree, radiuses -150, 400") << -150.0 << 400.0 << 0.0 << 160.7 << 0.0;
+    QTest::newRow("Arc less than 180 degree, radiuses 150, -400") << 150.0 << -400.0 << 0.0 << 160.7 << 0.0;
+    QTest::newRow("Arc less than 180 degree, radiuses -150, -400") << -150.0 << -400.0 << 0.0 << 160.7 << 0.0;
+
     QTest::newRow("Arc less than 180 degree, radiuses 1500, 800") << 1500.0 << 800.0 << 0.0 << 160.7 << 0.0;
+    QTest::newRow("Arc less than 180 degree, radiuses -1500, 800") << -1500.0 << 800.0 << 0.0 << 160.7 << 0.0;
+    QTest::newRow("Arc less than 180 degree, radiuses 1500, -800") << 1500.0 << -800.0 << 0.0 << 160.7 << 0.0;
+    QTest::newRow("Arc less than 180 degree, radiuses -1500, -800") << -1500.0 << -800.0 << 0.0 << 160.7 << 0.0;
+
     QTest::newRow("Arc less than 180 degree, radiuses 15000, 1500, rotation 270")
         << 15000.0 << 1500.0 << 0.0 << 160.7 << 270.0;
+    QTest::newRow("Arc less than 180 degree, radiuses -15000, 1500, rotation 270")
+        << -15000.0 << 1500.0 << 0.0 << 160.7 << 270.0;
+    QTest::newRow("Arc less than 180 degree, radiuses 15000, -1500, rotation 270")
+        << 15000.0 << -1500.0 << 0.0 << 160.7 << 270.0;
+    QTest::newRow("Arc less than 180 degree, radiuses -15000, -1500, rotation 270")
+        << -15000.0 << -1500.0 << 0.0 << 160.7 << 270.0;
+
     QTest::newRow("Arc less than 180 degree, radiuses 15000, 10000") << 15000.0 << 10000.0 << 0.0 << 160.7 << 0.0;
+    QTest::newRow("Arc less than 180 degree, radiuses -15000, 10000") << -15000.0 << 10000.0 << 0.0 << 160.7 << 0.0;
+    QTest::newRow("Arc less than 180 degree, radiuses 15000, -10000") << 15000.0 << -10000.0 << 0.0 << 160.7 << 0.0;
+    QTest::newRow("Arc less than 180 degree, radiuses -15000, -10000") << -15000.0 << -10000.0 << 0.0 << 160.7 << 0.0;
 
     QTest::newRow("Arc 180 degree, radiuses 100, 50") << 100.0 << 50.0 << 0.0 << 180.0 << 0.0;
+    QTest::newRow("Arc 180 degree, radiuses -100, 50") << -100.0 << 50.0 << 0.0 << 180.0 << 0.0;
+    QTest::newRow("Arc 180 degree, radiuses 100, -50") << 100.0 << -50.0 << 0.0 << 180.0 << 0.0;
+    QTest::newRow("Arc 180 degree, radiuses -100, -50") << -100.0 << -50.0 << 0.0 << 180.0 << 0.0;
+
     QTest::newRow("Arc 180 degree, radiuses 150, 400") << 150.0 << 400.0 << 0.0 << 180.0 << 0.0;
+    QTest::newRow("Arc 180 degree, radiuses -150, 400") << -150.0 << 400.0 << 0.0 << 180.0 << 0.0;
+    QTest::newRow("Arc 180 degree, radiuses 150, -400") << 150.0 << -400.0 << 0.0 << 180.0 << 0.0;
+    QTest::newRow("Arc 180 degree, radiuses -150, -400") << -150.0 << -400.0 << 0.0 << 180.0 << 0.0;
+
     QTest::newRow("Arc 180 degree, radiuses 1500, 800") << 1500.0 << 800.0 << 0.0 << 180.0 << 0.0;
+    QTest::newRow("Arc 180 degree, radiuses -1500, 800") << -1500.0 << 800.0 << 0.0 << 180.0 << 0.0;
+    QTest::newRow("Arc 180 degree, radiuses 1500, -800") << 1500.0 << -800.0 << 0.0 << 180.0 << 0.0;
+    QTest::newRow("Arc 180 degree, radiuses -1500, -800") << -1500.0 << -800.0 << 0.0 << 180.0 << 0.0;
+
     QTest::newRow("Arc 180 degree, radiuses 15000, 1500, rotation 60") << 15000.0 << 1500.0 << 0.0 << 180.0 << 60.0;
+    QTest::newRow("Arc 180 degree, radiuses -15000, 1500, rotation 60") << -15000.0 << 1500.0 << 0.0 << 180.0 << 60.0;
+    QTest::newRow("Arc 180 degree, radiuses 15000, -1500, rotation 60") << 15000.0 << -1500.0 << 0.0 << 180.0 << 60.0;
+    QTest::newRow("Arc 180 degree, radiuses -15000, -1500, rotation 60") << -15000.0 << -1500.0 << 0.0 << 180.0 << 60.0;
+
     QTest::newRow("Arc 180 degree, radiuses 15000, 10000") << 15000.0 << 10000.0 << 0.0 << 180.0 << 0.0;
+    QTest::newRow("Arc 180 degree, radiuses -15000, 10000") << -15000.0 << 10000.0 << 0.0 << 180.0 << 0.0;
+    QTest::newRow("Arc 180 degree, radiuses 15000, -10000") << 15000.0 << -10000.0 << 0.0 << 180.0 << 0.0;
+    QTest::newRow("Arc 180 degree, radiuses -15000, -10000") << -15000.0 << -10000.0 << 0.0 << 180.0 << 0.0;
 
     QTest::newRow("Arc less than 270 degree, radiuses 100, 50") << 100.0 << 50.0 << 0.0 << 150.3 << 0.0;
+    QTest::newRow("Arc less than 270 degree, radiuses -100, 50") << -100.0 << 50.0 << 0.0 << 150.3 << 0.0;
+    QTest::newRow("Arc less than 270 degree, radiuses 100, -50") << 100.0 << -50.0 << 0.0 << 150.3 << 0.0;
+    QTest::newRow("Arc less than 270 degree, radiuses -100, -50") << -100.0 << -50.0 << 0.0 << 150.3 << 0.0;
+
     QTest::newRow("Arc less than 270 degree, radiuses 150, 400") << 150.0 << 400.0 << 0.0 << 150.3 << 0.0;
+    QTest::newRow("Arc less than 270 degree, radiuses -150, 400") << -150.0 << 400.0 << 0.0 << 150.3 << 0.0;
+    QTest::newRow("Arc less than 270 degree, radiuses 150, -400") << 150.0 << -400.0 << 0.0 << 150.3 << 0.0;
+    QTest::newRow("Arc less than 270 degree, radiuses -150, -400") << -150.0 << -400.0 << 0.0 << 150.3 << 0.0;
+
     QTest::newRow("Arc less than 270 degree, radiuses 1500, 800") << 1500.0 << 800.0 << 0.0 << 150.3 << 0.0;
+    QTest::newRow("Arc less than 270 degree, radiuses -1500, 800") << -1500.0 << 800.0 << 0.0 << 150.3 << 0.0;
+    QTest::newRow("Arc less than 270 degree, radiuses 1500, -800") << 1500.0 << -800.0 << 0.0 << 150.3 << 0.0;
+    QTest::newRow("Arc less than 270 degree, radiuses -1500, -800") << -1500.0 << -800.0 << 0.0 << 150.3 << 0.0;
+
     QTest::newRow("Arc less than 270 degree, radiuses 15000, 1500, rotation 20")
         << 15000.0 << 1500.0 << 0.0 << 150.3 << 20.0;
+    QTest::newRow("Arc less than 270 degree, radiuses -15000, 1500, rotation 20")
+        << -15000.0 << 1500.0 << 0.0 << 150.3 << 20.0;
+    QTest::newRow("Arc less than 270 degree, radiuses 15000, -1500, rotation 20")
+        << 15000.0 << -1500.0 << 0.0 << 150.3 << 20.0;
+    QTest::newRow("Arc less than 270 degree, radiuses -15000, -1500, rotation 20")
+        << -15000.0 << -1500.0 << 0.0 << 150.3 << 20.0;
+
     QTest::newRow("Arc less than 270 degree, radiuses 15000, 10000") << 15000.0 << 10000.0 << 0.0 << 150.3 << 0.0;
+    QTest::newRow("Arc less than 270 degree, radiuses -15000, 10000") << -15000.0 << 10000.0 << 0.0 << 150.3 << 0.0;
+    QTest::newRow("Arc less than 270 degree, radiuses 15000, -10000") << 15000.0 << -10000.0 << 0.0 << 150.3 << 0.0;
+    QTest::newRow("Arc less than 270 degree, radiuses -15000, -10000") << -15000.0 << -10000.0 << 0.0 << 150.3 << 0.0;
 
     QTest::newRow("Arc 270 degree, radiuses 100, 50") << 100.0 << 50.0 << 0.0 << 270.0 << 0.0;
+    QTest::newRow("Arc 270 degree, radiuses -100, 50") << -100.0 << 50.0 << 0.0 << 270.0 << 0.0;
+    QTest::newRow("Arc 270 degree, radiuses 100, -50") << 100.0 << -50.0 << 0.0 << 270.0 << 0.0;
+    QTest::newRow("Arc 270 degree, radiuses -100, -50") << -100.0 << -50.0 << 0.0 << 270.0 << 0.0;
+
     QTest::newRow("Arc 270 degree, radiuses 150, 400") << 150.0 << 400.0 << 0.0 << 270.0 << 0.0;
+    QTest::newRow("Arc 270 degree, radiuses -150, 400") << -150.0 << 400.0 << 0.0 << 270.0 << 0.0;
+    QTest::newRow("Arc 270 degree, radiuses 150, -400") << 150.0 << -400.0 << 0.0 << 270.0 << 0.0;
+    QTest::newRow("Arc 270 degree, radiuses -150, -400") << -150.0 << -400.0 << 0.0 << 270.0 << 0.0;
+
     QTest::newRow("Arc 270 degree, radiuses 1500, 800") << 1500.0 << 800.0 << 0.0 << 270.0 << 0.0;
+    QTest::newRow("Arc 270 degree, radiuses -1500, 800") << -1500.0 << 800.0 << 0.0 << 270.0 << 0.0;
+    QTest::newRow("Arc 270 degree, radiuses 1500, -800") << 1500.0 << -800.0 << 0.0 << 270.0 << 0.0;
+    QTest::newRow("Arc 270 degree, radiuses -1500, -800") << -1500.0 << -800.0 << 0.0 << 270.0 << 0.0;
+
     QTest::newRow("Arc 270 degree, radiuses 15000, 1500, rotation 90") << 15000.0 << 1500.0 << 0.0 << 270.0 << 90.0;
+    QTest::newRow("Arc 270 degree, radiuses -15000, 1500, rotation 90") << -15000.0 << 1500.0 << 0.0 << 270.0 << 90.0;
+    QTest::newRow("Arc 270 degree, radiuses 15000, -1500, rotation 90") << 15000.0 << -1500.0 << 0.0 << 270.0 << 90.0;
+    QTest::newRow("Arc 270 degree, radiuses -15000, -1500, rotation 90") << -15000.0 << -1500.0 << 0.0 << 270.0 << 90.0;
+
     QTest::newRow("Arc 270 degree, radiuses 15000, 10000") << 15000.0 << 10000.0 << 0.0 << 270.0 << 0.0;
+    QTest::newRow("Arc 270 degree, radiuses -15000, 10000") << -15000.0 << 10000.0 << 0.0 << 270.0 << 0.0;
+    QTest::newRow("Arc 270 degree, radiuses 15000, -10000") << 15000.0 << -10000.0 << 0.0 << 270.0 << 0.0;
+    QTest::newRow("Arc 270 degree, radiuses -15000, -10000") << -15000.0 << -10000.0 << 0.0 << 270.0 << 0.0;
 
     QTest::newRow("Arc less than 360 degree, radiuses 100, 50") << 100.0 << 50.0 << 0.0 << 340.0 << 0.0;
+    QTest::newRow("Arc less than 360 degree, radiuses -100, 50") << -100.0 << 50.0 << 0.0 << 340.0 << 0.0;
+    QTest::newRow("Arc less than 360 degree, radiuses 100, -50") << 100.0 << -50.0 << 0.0 << 340.0 << 0.0;
+    QTest::newRow("Arc less than 360 degree, radiuses -100, -50") << -100.0 << -50.0 << 0.0 << 340.0 << 0.0;
+
     QTest::newRow("Arc less than 360 degree, radiuses 150, 400") << 150.0 << 400.0 << 0.0 << 340.0 << 0.0;
+    QTest::newRow("Arc less than 360 degree, radiuses -150, 400") << -150.0 << 400.0 << 0.0 << 340.0 << 0.0;
+    QTest::newRow("Arc less than 360 degree, radiuses 150, -400") << 150.0 << -400.0 << 0.0 << 340.0 << 0.0;
+    QTest::newRow("Arc less than 360 degree, radiuses -150, -400") << -150.0 << -400.0 << 0.0 << 340.0 << 0.0;
+
     QTest::newRow("Arc less than 360 degree, radiuses 1500, 800") << 1500.0 << 800.0 << 0.0 << 340.0 << 0.0;
+    QTest::newRow("Arc less than 360 degree, radiuses -1500, 800") << -1500.0 << 800.0 << 0.0 << 340.0 << 0.0;
+    QTest::newRow("Arc less than 360 degree, radiuses 1500, -800") << 1500.0 << -800.0 << 0.0 << 340.0 << 0.0;
+    QTest::newRow("Arc less than 360 degree, radiuses -1500, -800") << -1500.0 << -800.0 << 0.0 << 340.0 << 0.0;
+
     QTest::newRow("Arc less than 360 degree, radiuses 12000, 1200, rotation 30")
         << 12000.0 << 1200.0 << 0.0 << 340.0 << 30.0;
-    QTest::newRow("Arc less than 360 degree, radiuses 12000, 10000") << 15000.0 << 10000.0 << 0.0 << 340.0 << 0.0;
+    QTest::newRow("Arc less than 360 degree, radiuses -12000, 1200, rotation 30")
+        << -12000.0 << 1200.0 << 0.0 << 340.0 << 30.0;
+    QTest::newRow("Arc less than 360 degree, radiuses 12000, -1200, rotation 30")
+        << 12000.0 << -1200.0 << 0.0 << 340.0 << 30.0;
+    QTest::newRow("Arc less than 360 degree, radiuses -12000, -1200, rotation 30")
+        << -12000.0 << -1200.0 << 0.0 << 340.0 << 30.0;
+
+    QTest::newRow("Arc less than 360 degree, radiuses 12000, 10000") << 12000.0 << 10000.0 << 0.0 << 340.0 << 0.0;
+    QTest::newRow("Arc less than 360 degree, radiuses -12000, 10000") << -12000.0 << 10000.0 << 0.0 << 340.0 << 0.0;
+    QTest::newRow("Arc less than 360 degree, radiuses 12000, -10000") << 12000.0 << -10000.0 << 0.0 << 340.0 << 0.0;
+    QTest::newRow("Arc less than 360 degree, radiuses -12000, -10000") << -12000.0 << -10000.0 << 0.0 << 340.0 << 0.0;
 
     QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses 100, 50") << 100.0 << 50.0 << 90.0 << 135.0 << 0.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses -100, 50") << -100.0 << 50.0 << 90.0 << 135.0 << 0.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses 100, -50") << 100.0 << -50.0 << 90.0 << 135.0 << 0.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses -100, -50")
+        << -100.0 << -50.0 << 90.0 << 135.0 << 0.0;
+
     QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses 150, 400") << 150.0 << 400.0 << 90.0 << 135.0 << 0.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses -150, 400")
+        << -150.0 << 400.0 << 90.0 << 135.0 << 0.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses 150, -400")
+        << 150.0 << -400.0 << 90.0 << 135.0 << 0.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses -150, -400")
+        << -150.0 << -400.0 << 90.0 << 135.0 << 0.0;
+
     QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses 1500, 800")
         << 1500.0 << 800.0 << 90.0 << 135.0 << 0.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses -1500, 800")
+        << -1500.0 << 800.0 << 90.0 << 135.0 << 0.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses 1500, -800")
+        << 1500.0 << -800.0 << 90.0 << 135.0 << 0.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses -1500, -800")
+        << -1500.0 << -800.0 << 90.0 << 135.0 << 0.0;
+
     QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses 13000, 1000")
-        << 15000.0 << 1000.0 << 90.0 << 135.0 << 0.0;
+        << 13000.0 << 1000.0 << 90.0 << 135.0 << 0.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses -13000, 1000")
+        << -13000.0 << 1000.0 << 90.0 << 135.0 << 0.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses 13000, -1000")
+        << 13000.0 << -1000.0 << 90.0 << 135.0 << 0.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses -13000, -1000")
+        << -13000.0 << -1000.0 << 90.0 << 135.0 << 0.0;
+
     QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses 15000, 10000")
         << 15000.0 << 10000.0 << 90.0 << 135.0 << 0.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses -15000, 10000")
+        << -15000.0 << 10000.0 << 90.0 << 135.0 << 0.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses 15000, -10000")
+        << 15000.0 << -10000.0 << 90.0 << 135.0 << 0.0;
+    QTest::newRow("Arc start 90 degree, angle 45 degree, radiuses -15000, -10000")
+        << -15000.0 << -10000.0 << 90.0 << 135.0 << 0.0;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -326,10 +755,10 @@ void TST_VEllipticalArc::TestGetPoints2()
     const qreal c = qSqrt(qAbs(radius2 * radius2 - radius1 * radius1));
     // distance from the center to the focus
 
-    QPointF focus1 = static_cast<QPointF>(center);
-    QPointF focus2 = static_cast<QPointF>(center);
+    auto focus1 = static_cast<QPointF>(center);
+    auto focus2 = static_cast<QPointF>(center);
 
-    if (radius1 < radius2)
+    if (qAbs(radius1) < qAbs(radius2))
     {
         focus1.setY(focus1.ry() + c);
         QLineF line(static_cast<QPointF>(center), focus1);
@@ -354,7 +783,7 @@ void TST_VEllipticalArc::TestGetPoints2()
         focus2 = line.p2();
     }
 
-    QPointF ellipsePoint(center.x() + radius1, center.y());
+    QPointF ellipsePoint(center.x() + qAbs(radius1), center.y());
     QLineF line(static_cast<QPointF>(center), ellipsePoint);
     line.setAngle(line.angle() + rotationAngle);
     ellipsePoint = line.p2();
@@ -401,7 +830,7 @@ void TST_VEllipticalArc::TestGetPoints3()
 
     if (VFuzzyComparePossibleNulls(arc.AngleArc(), 360.0))
     { // calculated full ellipse square
-        const qreal ellipseSquare = M_PI * radius1 * radius2;
+        const qreal ellipseSquare = M_PI * qAbs(radius1) * qAbs(radius2);
         const qreal epsSquare = ellipseSquare * 1.7 / 100; // computing error 1.7 % from origin square
         const qreal arcSquare = qAbs(VAbstractPiece::SumTrapezoids(points) / 2.0);
         const qreal diffSquare = qAbs(ellipseSquare - arcSquare);
@@ -430,9 +859,15 @@ void TST_VEllipticalArc::TestGetPoints4()
 
     if (VFuzzyComparePossibleNulls(arc.AngleArc(), 360.0))
     { // calculated full ellipse length
-        const qreal h = ((radius1 - radius2) * (radius1 - radius2)) / ((radius1 + radius2) * (radius1 + radius2));
-        const qreal ellipseLength = M_PI * (radius1 + radius2) * (1 + 3 * h / (10 + qSqrt(4 - 3 * h)));
-        const qreal epsLength = ToPixel(1, Unit::Mm); // computing error
+        const qreal h = ((qAbs(radius1) - qAbs(radius2)) * (qAbs(radius1) - qAbs(radius2))) /
+                        ((qAbs(radius1) + qAbs(radius2)) * (qAbs(radius1) + qAbs(radius2)));
+        qreal ellipseLength = M_PI * (qAbs(radius1) + qAbs(radius2)) * (1 + 3 * h / (10 + qSqrt(4 - 3 * h)));
+        if (radius1 < 0 || radius2 < 0)
+        {
+            ellipseLength *= -1;
+        }
+
+        Q_RELAXED_CONSTEXPR qreal epsLength = ToPixel(1, Unit::Mm); // computing error
         const qreal arcLength = VEllipticalArc(center, radius1, radius2, 0, 360, 0).GetLength();
         const qreal diffLength = qAbs(arcLength - ellipseLength);
         // cppcheck-suppress unreadVariable
@@ -487,17 +922,37 @@ void TST_VEllipticalArc::TestGetPoints5()
 
     if (points.size() > 2 && qFuzzyIsNull(rotationAngle))
     {
-        const qreal testAccuracy = ToPixel(1.5, Unit::Mm);
-        ComparePointsDistance(arc.GetP1(), points.constFirst(), testAccuracy);
-        ComparePointsDistance(arc.GetP2(), points.constLast(), testAccuracy);
+        Q_RELAXED_CONSTEXPR qreal testAccuracy = ToPixel(1.5, Unit::Mm);
+
+        if (!arc.IsFlipped())
+        {
+            ComparePointsDistance(arc.GetP1(), points.constFirst(), testAccuracy);
+            ComparePointsDistance(arc.GetP2(), points.constLast(), testAccuracy);
+        }
+        else
+        {
+            ComparePointsDistance(arc.GetP1(), points.constLast(), testAccuracy);
+            ComparePointsDistance(arc.GetP2(), points.constFirst(), testAccuracy);
+        }
 
         const qreal eps = 0.15;
 
-        f1 = QLineF(static_cast<QPointF>(center), points.constFirst()).angle();
-        QVERIFY2(f1 - stAngle <= eps, qUtf8Printable(QStringLiteral("f1: %1; expected: %2").arg(f1).arg(stAngle)));
+        if (!arc.IsFlipped())
+        {
+            f1 = QLineF(static_cast<QPointF>(center), points.constFirst()).angle();
+            QVERIFY2(f1 - stAngle <= eps, qUtf8Printable(QStringLiteral("f1: %1; expected: %2").arg(f1).arg(stAngle)));
 
-        f2 = QLineF(static_cast<QPointF>(center), points.constLast()).angle();
-        QVERIFY2(f2 - enAngle <= eps, qUtf8Printable(QStringLiteral("f2: %1; expected: %2").arg(f2).arg(enAngle)));
+            f2 = QLineF(static_cast<QPointF>(center), points.constLast()).angle();
+            QVERIFY2(f2 - enAngle <= eps, qUtf8Printable(QStringLiteral("f2: %1; expected: %2").arg(f2).arg(enAngle)));
+        }
+        else
+        {
+            f1 = QLineF(static_cast<QPointF>(center), points.constLast()).angle();
+            QVERIFY2(f1 - stAngle <= eps, qUtf8Printable(QStringLiteral("f1: %1; expected: %2").arg(f1).arg(stAngle)));
+
+            f2 = QLineF(static_cast<QPointF>(center), points.constFirst()).angle();
+            QVERIFY2(f2 - enAngle <= eps, qUtf8Printable(QStringLiteral("f2: %1; expected: %2").arg(f2).arg(enAngle)));
+        }
     }
 }
 
@@ -514,17 +969,96 @@ void TST_VEllipticalArc::TestRotation_data()
     QTest::addColumn<qreal>("degrees");
     QTest::addColumn<QString>("prefix");
 
-    QTest::newRow("Test el arc 1") << QPointF() << 10. << 20.0 << 1. << 91. << 0. << QPointF() << 90. << "_r";
-    QTest::newRow("Test el arc 2") << QPointF() << 10. << 20.0 << 0. << 90. << 0. << QPointF() << 90. << "_r";
-    QTest::newRow("Test el arc 3.2") << QPointF(10, 10) << 10. << 20.0 << 0. << 90. << 0. << QPointF() << 90. << "_r";
-    QTest::newRow("Test el arc 3.1") << QPointF(10, 10) << 10. << 20.0 << 1. << 91. << 0. << QPointF() << 90. << "_r";
-    QTest::newRow("Test el arc 3") << QPointF(10, 10) << 10. << 20.0 << 1. << 91. << 90. << QPointF() << 90. << "_r";
-    QTest::newRow("Test el arc 4") << QPointF(10, 10) << 10. << 20.0 << 0. << 90. << 90. << QPointF() << 90. << "_r";
-    QTest::newRow("Test el arc 5") << QPointF(10, 10) << 10. << 20.0 << 0. << 180. << 90. << QPointF() << 90. << "_r";
-    QTest::newRow("Test el arc 6") << QPointF(10, 10) << 10. << 20.0 << 1. << 181. << 90. << QPointF() << 90. << "_r";
-    QTest::newRow("Test el arc 7") << QPointF(10, 10) << 10. << 20.0 << 0. << 270. << 90. << QPointF() << 90. << "_r";
-    QTest::newRow("Test el arc 8") << QPointF(10, 10) << 10. << 20.0 << 1. << 271. << 90. << QPointF() << 90. << "_r";
-    QTest::newRow("Test el arc 9") << QPointF(10, 10) << 10. << 20.0 << 0. << 360. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 1, +r, +r") << QPointF() << 10. << 20.0 << 1. << 91. << 0. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 1, -r, +r") << QPointF() << -10. << 20.0 << 1. << 91. << 0. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 1, +r, -r") << QPointF() << 10. << -20.0 << 1. << 91. << 0. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 1, -r, -r") << QPointF() << -10. << -20.0 << 1. << 91. << 0. << QPointF() << 90. << "_r";
+
+    QTest::newRow("Test el arc 2, +r, +r") << QPointF() << 10. << 20.0 << 0. << 90. << 0. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 2, -r, +r") << QPointF() << -10. << 20.0 << 0. << 90. << 0. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 2, +r, -r") << QPointF() << 10. << -20.0 << 0. << 90. << 0. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 2, -r, -r") << QPointF() << -10. << -20.0 << 0. << 90. << 0. << QPointF() << 90. << "_r";
+
+    QTest::newRow("Test el arc 3.2, +r, +r")
+        << QPointF(10, 10) << 10. << 20.0 << 0. << 90. << 0. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 3.2, -r, +r")
+        << QPointF(10, 10) << -10. << 20.0 << 0. << 90. << 0. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 3.2, +r, -r")
+        << QPointF(10, 10) << 10. << -20.0 << 0. << 90. << 0. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 3.2, -r, -r")
+        << QPointF(10, 10) << -10. << -20.0 << 0. << 90. << 0. << QPointF() << 90. << "_r";
+
+    QTest::newRow("Test el arc 3.1, +r, +r")
+        << QPointF(10, 10) << 10. << 20.0 << 1. << 91. << 0. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 3.1, -r, +r")
+        << QPointF(10, 10) << -10. << 20.0 << 1. << 91. << 0. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 3.1, +r, -r")
+        << QPointF(10, 10) << 10. << -20.0 << 1. << 91. << 0. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 3.1, -r, -r")
+        << QPointF(10, 10) << -10. << -20.0 << 1. << 91. << 0. << QPointF() << 90. << "_r";
+
+    QTest::newRow("Test el arc 3, +r, +r")
+        << QPointF(10, 10) << 10. << 20.0 << 1. << 91. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 3, -r, +r")
+        << QPointF(10, 10) << -10. << 20.0 << 1. << 91. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 3, +r, -r")
+        << QPointF(10, 10) << 10. << -20.0 << 1. << 91. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 3, -r, -r")
+        << QPointF(10, 10) << -10. << -20.0 << 1. << 91. << 90. << QPointF() << 90. << "_r";
+
+    QTest::newRow("Test el arc 4, +r, +r")
+        << QPointF(10, 10) << 10. << 20.0 << 0. << 90. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 4, -r, +r")
+        << QPointF(10, 10) << -10. << 20.0 << 0. << 90. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 4, +r, -r")
+        << QPointF(10, 10) << 10. << -20.0 << 0. << 90. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 4, -r, -r")
+        << QPointF(10, 10) << -10. << -20.0 << 0. << 90. << 90. << QPointF() << 90. << "_r";
+
+    QTest::newRow("Test el arc 5, +r, +r")
+        << QPointF(10, 10) << 10. << 20.0 << 0. << 180. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 5, -r, +r")
+        << QPointF(10, 10) << -10. << 20.0 << 0. << 180. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 5, +r, -r")
+        << QPointF(10, 10) << 10. << -20.0 << 0. << 180. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 5, -r, -r")
+        << QPointF(10, 10) << -10. << -20.0 << 0. << 180. << 90. << QPointF() << 90. << "_r";
+
+    QTest::newRow("Test el arc 6, +r, +r")
+        << QPointF(10, 10) << 10. << 20.0 << 1. << 181. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 6, -r, +r")
+        << QPointF(10, 10) << -10. << 20.0 << 1. << 181. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 6, +r, -r")
+        << QPointF(10, 10) << 10. << -20.0 << 1. << 181. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 6, -r, -r")
+        << QPointF(10, 10) << -10. << -20.0 << 1. << 181. << 90. << QPointF() << 90. << "_r";
+
+    QTest::newRow("Test el arc 7, +r, +r")
+        << QPointF(10, 10) << 10. << 20.0 << 0. << 270. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 7, -r, +r")
+        << QPointF(10, 10) << -10. << 20.0 << 0. << 270. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 7, +r, -r")
+        << QPointF(10, 10) << 10. << -20.0 << 0. << 270. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 7, -r, -r")
+        << QPointF(10, 10) << -10. << -20.0 << 0. << 270. << 90. << QPointF() << 90. << "_r";
+
+    QTest::newRow("Test el arc 8, +r, +r")
+        << QPointF(10, 10) << 10. << 20.0 << 1. << 271. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 8, -r, +r")
+        << QPointF(10, 10) << -10. << 20.0 << 1. << 271. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 8, +r, -r")
+        << QPointF(10, 10) << 10. << -20.0 << 1. << 271. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 8, -r, -r")
+        << QPointF(10, 10) << -10. << -20.0 << 1. << 271. << 90. << QPointF() << 90. << "_r";
+
+    QTest::newRow("Test el arc 9, +r, +r")
+        << QPointF(10, 10) << 10. << 20.0 << 0. << 360. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 9, -r, +r")
+        << QPointF(10, 10) << -10. << 20.0 << 0. << 360. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 9, +r, -r")
+        << QPointF(10, 10) << 10. << -20.0 << 0. << 360. << 90. << QPointF() << 90. << "_r";
+    QTest::newRow("Test el arc 9, -r, -r")
+        << QPointF(10, 10) << -10. << -20.0 << 0. << 360. << 90. << QPointF() << 90. << "_r";
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -563,37 +1097,48 @@ void TST_VEllipticalArc::TestRotation()
 //---------------------------------------------------------------------------------------------------------------------
 void TST_VEllipticalArc::TestFlip_data()
 {
-    QTest::addColumn<VEllipticalArc>("elArc");
+    QTest::addColumn<qreal>("radius1");
+    QTest::addColumn<qreal>("radius2");
     QTest::addColumn<QLineF>("axis");
     QTest::addColumn<QString>("prefix");
 
-    const VEllipticalArc elArc(VPointF(), 10., 20.0, 1., 91., 0.);
-
     QLineF axis(QPointF(600, 30), QPointF(600, 1800));
 
-    QTest::newRow("Vertical axis") << elArc << axis << "a2";
+    QTest::newRow("Vertical axis, +r, +r") << 10. << 20.0 << axis << "a2";
+    QTest::newRow("Vertical axis, -r, +r") << -10. << 20.0 << axis << "a2";
+    QTest::newRow("Vertical axis, +r, -r") << 10. << -20.0 << axis << "a2";
+    QTest::newRow("Vertical axis, -r, -r") << -10. << -20.0 << axis << "a2";
 
     axis = QLineF(QPointF(600, 30), QPointF(1200, 30));
 
-    QTest::newRow("Horizontal axis") << elArc << axis << "a2";
+    QTest::newRow("Horizontal axis, +r, +r") << 10. << 20.0 << axis << "a2";
+    QTest::newRow("Horizontal axis, -r, +r") << -10. << 20.0 << axis << "a2";
+    QTest::newRow("Horizontal axis, +r, -r") << 10. << -20.0 << axis << "a2";
+    QTest::newRow("Horizontal axis, -r, -r") << -10. << -20.0 << axis << "a2";
 
     axis = QLineF(QPointF(600, 30), QPointF(600, 1800));
     axis.setAngle(45);
 
-    QTest::newRow("Diagonal axis") << elArc << axis << "a2";
+    QTest::newRow("Diagonal axis, +r, +r") << 10. << 20.0 << axis << "a2";
+    QTest::newRow("Diagonal axis, -r, +r") << -10. << 20.0 << axis << "a2";
+    QTest::newRow("Diagonal axis, +r, -r") << 10. << -20.0 << axis << "a2";
+    QTest::newRow("Diagonal axis, -r, -r") << -10. << -20.0 << axis << "a2";
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 void TST_VEllipticalArc::TestFlip()
 {
-    QFETCH(VEllipticalArc, elArc);
+    QFETCH(qreal, radius1);
+    QFETCH(qreal, radius2);
     QFETCH(QLineF, axis);
     QFETCH(QString, prefix);
 
+    const VEllipticalArc elArc(VPointF(), radius1, radius2, 1., 91., 0.);
+
     const VEllipticalArc res = elArc.Flip(axis, prefix);
 
     // cppcheck-suppress unreadVariable
-    const QString errorMsg = QString("The name doesn't contain the prefix '%1'.").arg(prefix);
+    const QString errorMsg = QStringLiteral("The name doesn't contain the prefix '%1'.").arg(prefix);
     QVERIFY2(res.name().endsWith(prefix), qUtf8Printable(errorMsg));
 
     QCOMPARE(qRound(elArc.GetLength() * -1), qRound(res.GetLength()));
diff --git a/src/test/ValentinaTest/tst_vellipticalarc.h b/src/test/ValentinaTest/tst_vellipticalarc.h
index f03567506..c3d9dfe23 100644
--- a/src/test/ValentinaTest/tst_vellipticalarc.h
+++ b/src/test/ValentinaTest/tst_vellipticalarc.h
@@ -44,14 +44,15 @@ public:
 private slots:
     void CompareTwoWays_data();
     void CompareTwoWays();
-    void NegativeArc();
+    void ArcByLength_data();
+    void ArcByLength();
     void TestGetPoints1_data();
-    void TestGetPoints2_data();
-    void TestGetPoints3_data();
-    void TestGetPoints4_data();
     void TestGetPoints1();
+    void TestGetPoints2_data();
     void TestGetPoints2();
+    void TestGetPoints3_data();
     void TestGetPoints3();
+    void TestGetPoints4_data();
     void TestGetPoints4();
     void TestGetPoints5_data();
     void TestGetPoints5();