Incorrect behavior of empty arc and elliptical arc. Closes #129

ChangeLog.txt

@@ -1,3 +1,6 @@
+# Valentina 0.7.48 (unreleased)
+- [smart-pattern/valentina#129] Incorrect behavior of empty arc and elliptical arc.
+
 # Version 0.7.47 May 13, 2021
 - [smart-pattern/valentina#118] Incorrect seam allowance.
 - [smart-pattern/valentina#119] Improve tool Point of intersection curves.

src/libs/vgeometry/varc.cpp

@@ -263,6 +263,11 @@ QPointF VArc::GetP2 () const
  */
 QVector<QPointF> VArc::GetPoints() const
 {
+    if (qFuzzyIsNull(GetRadius()))
+    {
+        return {GetCenter().toQPointF()};
+    }
+
     QVector<QPointF> points;
     QVector<qreal> sectionAngle;
 

src/libs/vgeometry/vellipticalarc.cpp

@@ -493,12 +493,23 @@ qreal VEllipticalArc::MaxLength() const
 //---------------------------------------------------------------------------------------------------------------------
 QPointF VEllipticalArc::GetP(qreal angle) const
 {
+    if (qFuzzyIsNull(GetRadius1()) && qFuzzyIsNull(GetRadius2()))
+    {
+        return GetCenter().toQPointF();
+    }
+
     QLineF line(0, 0, 100, 0);
     line.setAngle(angle);
 
-    const qreal a = line.p2().x() / GetRadius1();
-    const qreal b = line.p2().y() / GetRadius2();
+    const qreal a = not qFuzzyIsNull(GetRadius1()) ? line.p2().x() / GetRadius1() : 0;
+    const qreal b = not qFuzzyIsNull(GetRadius2()) ? line.p2().y() / GetRadius2() : 0;
     const qreal k = qSqrt(a*a + b*b);
+
+    if (qFuzzyIsNull(k))
+    {
+        return GetCenter().toQPointF();
+    }
+
     QPointF p(line.p2().x() / k, line.p2().y() / k);
 
     QLineF line2(QPointF(), p);
@@ -565,6 +576,13 @@ void VEllipticalArc::SetFormulaRadius1(const QString &formula, qreal value)
     d->radius1 = value;
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void VEllipticalArc::SetRadius1(qreal value)
+{
+    d->formulaRadius1 = QString::number(value);
+    d->radius1 = value;
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 void VEllipticalArc::SetFormulaRadius2(const QString &formula, qreal value)
 {
@@ -572,6 +590,13 @@ void VEllipticalArc::SetFormulaRadius2(const QString &formula, qreal value)
     d->radius2 = value;
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void VEllipticalArc::SetRadius2(qreal value)
+{
+    d->formulaRadius2 = QString::number(value);
+    d->radius2 = value;
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 void VEllipticalArc::SetFormulaRotationAngle(const QString &formula, qreal value)
 {
@@ -579,6 +604,13 @@ void VEllipticalArc::SetFormulaRotationAngle(const QString &formula, qreal value
     d->rotationAngle = value;
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void VEllipticalArc::SetRotationAngle(qreal value)
+{
+    d->formulaRotationAngle = QString::number(value);
+    d->rotationAngle = value;
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief GetRadius1 return elliptical arc major radius.

src/libs/vgeometry/vellipticalarc.h

@@ -75,14 +75,17 @@ public:
 
     QString GetFormulaRotationAngle () const;
     void    SetFormulaRotationAngle (const QString &formula, qreal value);
+    void    SetRotationAngle(qreal value);
     qreal   GetRotationAngle() const;
 
     QString GetFormulaRadius1 () const;
     void    SetFormulaRadius1 (const QString &formula, qreal value);
+    void    SetRadius1 (qreal value);
     qreal   GetRadius1 () const;
 
     QString GetFormulaRadius2 () const;
     void    SetFormulaRadius2 (const QString &formula, qreal value);
+    void    SetRadius2 (qreal value);
     qreal   GetRadius2 () const;
 
     virtual qreal GetLength () const override;

src/test/ValentinaTest/tst_varc.cpp

@@ -456,3 +456,12 @@ void TST_VArc::TestCurveIntersectAxis()
 
     Comparison(intersectionPoint, crosPoint, accuracyPointOnLine);
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+void TST_VArc::EmptyArc()
+{
+    VArc empty;
+
+    Comparison(empty.GetPoints(), {QPointF()});
+    QCOMPARE(empty.GetLength(), 0);
+}

src/test/ValentinaTest/tst_varc.h

@@ -50,6 +50,7 @@ private slots:
     void TestCutArc();
     void TestCurveIntersectAxis_data();
     void TestCurveIntersectAxis();
+    void EmptyArc();
 };
 
 #endif // TST_VARC_H

src/test/ValentinaTest/tst_vellipticalarc.cpp

@@ -577,3 +577,29 @@ void TST_VEllipticalArc::TestFlip()
     QCOMPARE(elArc.GetRadius1(), res.GetRadius1());
     QCOMPARE(elArc.GetRadius2(), res.GetRadius2());
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+void TST_VEllipticalArc::EmptyArc_data()
+{
+    QTest::addColumn<qreal>("radius1");
+    QTest::addColumn<qreal>("radius2");
+    QTest::addColumn<qreal>("length");
+
+    QTest::newRow("Empty elArc") << 0. << 0. << 0.;
+    QTest::newRow("Radius1 correct") << 50. << 0. << 50.*4;
+    QTest::newRow("Radius2 correct") << 0. << 30. << 30.*4;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void TST_VEllipticalArc::EmptyArc()
+{
+    QFETCH(qreal, radius1);
+    QFETCH(qreal, radius2);
+    QFETCH(qreal, length);
+
+    VEllipticalArc empty;
+    empty.SetRadius1(radius1);
+    empty.SetRadius2(radius2);
+
+    QCOMPARE(empty.GetLength(), length);
+}

src/test/ValentinaTest/tst_vellipticalarc.h

@@ -55,6 +55,8 @@ private slots:
     void TestRotation();
     void TestFlip_data();
     void TestFlip();
+    void EmptyArc_data();
+    void EmptyArc();
 
 private:
     Q_DISABLE_COPY(TST_VEllipticalArc)