Flipping VPointF.

--HG--
branch : feature

src/libs/vgeometry/vgobject.cpp

@@ -33,6 +33,7 @@
 #include <QPoint>
 #include <QPointF>
 #include <QRectF>
+#include <QTransform>
 
 #include "../vmisc/def.h"
 #include "../vmisc/vmath.h"
@@ -575,3 +576,39 @@ int VGObject::GetLengthContour(const QVector<QPointF> &contour, const QVector<QP
     }
     return qFloor(length);
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+QTransform VGObject::FlippingMatrix(const QLineF &axis)
+{
+    QTransform matrix;
+
+    if (axis.isNull())
+    {
+        return matrix;
+    }
+
+    const QLineF axisOX = QLineF(axis.x2(), axis.y2(), axis.x2() + 100, axis.y2()); // Ox axis
+
+    const qreal angle = axis.angleTo(axisOX);
+    const QPointF p2 = axis.p2();
+
+    QTransform m;
+    m.translate(p2.x(), p2.y());
+    m.rotate(-angle);
+    m.translate(-p2.x(), -p2.y());
+    matrix *= m;
+
+    m.reset();
+    m.translate(p2.x(), p2.y());
+    m.scale(m.m11(), m.m22()*-1);
+    m.translate(-p2.x(), -p2.y());
+    matrix *= m;
+
+    m.reset();
+    m.translate(p2.x(), p2.y());
+    m.rotate(-(360-angle));
+    m.translate(-p2.x(), -p2.y());
+    matrix *= m;
+
+    return matrix;
+}

src/libs/vgeometry/vgobject.h

@@ -42,6 +42,7 @@ class QPoint;
 class QPointF;
 class QRectF;
 class VGObjectData;
+class QTransform;
 
 /**
  * @brief The VGObject class keep information graphical objects.
@@ -93,6 +94,8 @@ public:
     static int GetLengthContour(const QVector<QPointF> &contour, const QVector<QPointF> &newPoints);
 
     static double accuracyPointOnLine;
+protected:
+    static QTransform FlippingMatrix(const QLineF &axis);
 private:
     QSharedDataPointer<VGObjectData> d;
 

src/libs/vgeometry/vpointf.cpp

@@ -31,6 +31,7 @@
 #include <QLineF>
 #include <QPointF>
 #include <QString>
+#include <QTransform>
 
 //---------------------------------------------------------------------------------------------------------------------
 /**
@@ -113,6 +114,14 @@ VPointF VPointF::Rotate(const QPointF &originPoint, qreal degrees, const QString
     return VPointF(p, name() + prefix, mx(), my());
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+VPointF VPointF::Flip(const QLineF &axis, const QString &prefix) const
+{
+    const QTransform matrix = FlippingMatrix(axis);
+    const QPointF p = matrix.map(toQPointF());
+    return VPointF(p, name() + prefix, mx(), my());
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief mx return offset name respect to x

src/libs/vgeometry/vpointf.h

@@ -65,6 +65,7 @@ public:
     VPointF &operator=(const VPointF &point);
             operator QPointF() const;
     VPointF Rotate(const QPointF &originPoint, qreal degrees, const QString &prefix = QString()) const;
+    VPointF Flip(const QLineF &axis, const QString &prefix = QString()) const;
     qreal   mx() const;
     qreal   my() const;
     void    setMx(qreal mx);

src/test/ValentinaTest/ValentinaTest.pro

@@ -52,7 +52,8 @@ SOURCES += \
     tst_vellipticalarc.cpp \
     tst_vcubicbezierpath.cpp \
     tst_vgobject.cpp \
-    tst_vsplinepath.cpp
+    tst_vsplinepath.cpp \
+    tst_vpointf.cpp
 
 win32-msvc*:SOURCES += stable.cpp
 
@@ -75,7 +76,8 @@ HEADERS += \
     tst_vellipticalarc.h \
     tst_vcubicbezierpath.h \
     tst_vgobject.h \
-    tst_vsplinepath.h
+    tst_vsplinepath.h \
+    tst_vpointf.h
 
 # Set using ccache. Function enable_ccache() defined in common.pri.
 $$enable_ccache()

src/test/ValentinaTest/qttestmainlambda.cpp

@@ -46,6 +46,7 @@
 #include "tst_vcubicbezierpath.h"
 #include "tst_vgobject.h"
 #include "tst_vsplinepath.h"
+#include "tst_vpointf.h"
 
 #include "../vmisc/def.h"
 
@@ -80,6 +81,7 @@ int main(int argc, char** argv)
     ASSERT_TEST(new TST_VAbstractCurve());
     ASSERT_TEST(new TST_VCubicBezierPath());
     ASSERT_TEST(new TST_VGObject());
+    ASSERT_TEST(new TST_VPointF());
 
     return status;
 }

src/test/ValentinaTest/tst_vpointf.cpp

@@ -0,0 +1,86 @@
+/************************************************************************
+ **
+ **  @file
+ **  @author Roman Telezhynskyi <dismine(at)gmail.com>
+ **  @date   10 9, 2016
+ **
+ **  @brief
+ **  @copyright
+ **  This source code is part of the Valentine project, a pattern making
+ **  program, whose allow create and modeling patterns of clothing.
+ **  Copyright (C) 2016 Valentina project
+ **  <https://bitbucket.org/dismine/valentina> All Rights Reserved.
+ **
+ **  Valentina is free software: you can redistribute it and/or modify
+ **  it under the terms of the GNU General Public License as published by
+ **  the Free Software Foundation, either version 3 of the License, or
+ **  (at your option) any later version.
+ **
+ **  Valentina is distributed in the hope that it will be useful,
+ **  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ **  GNU General Public License for more details.
+ **
+ **  You should have received a copy of the GNU General Public License
+ **  along with Valentina.  If not, see <http://www.gnu.org/licenses/>.
+ **
+ *************************************************************************/
+
+#include "tst_vpointf.h"
+#include "../vgeometry/vpointf.h"
+#include "../vmisc/logging.h"
+
+#include <QtTest>
+
+//---------------------------------------------------------------------------------------------------------------------
+TST_VPointF::TST_VPointF(QObject *parent)
+    : QObject(parent)
+{
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void TST_VPointF::TestFlip_data()
+{
+    QTest::addColumn<VPointF>("originPoint");
+    QTest::addColumn<QLineF>("axis");
+    QTest::addColumn<QPointF>("flipped");
+    QTest::addColumn<QString>("prefix");
+
+    VPointF originPoint;
+    QLineF axis = QLineF(QPointF(5, 0), QPointF(5, 10));
+    QPointF flipped = QPointF(10, 0);
+
+    QTest::newRow("Vertical axis") << originPoint << axis << flipped << "a2";
+
+    axis = QLineF(QPointF(0, 5), QPointF(10, 5));
+    flipped = QPointF(0, 10);
+
+    QTest::newRow("Horizontal axis") << originPoint << axis << flipped << "a2";
+
+    QLineF l = QLineF(QPointF(), QPointF(10, 0));
+    l.setAngle(315);
+    flipped = l.p2();
+    l.setLength(l.length()/2.0);
+
+    axis = QLineF(l.p2(), l.p1());
+    axis.setAngle(axis.angle()+90);
+
+    QTest::newRow("Diagonal axis") << originPoint << axis << flipped << "a2";
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void TST_VPointF::TestFlip()
+{
+    QFETCH(VPointF, originPoint);
+    QFETCH(QLineF, axis);
+    QFETCH(QPointF, flipped);
+    QFETCH(QString, prefix);
+
+    const VPointF res = originPoint.Flip(axis, prefix);
+
+    const QString errorMsg = QString("The name doesn't contain the prefix '%1'.").arg(prefix);
+    QVERIFY2(res.name().endsWith(prefix), qUtf8Printable(errorMsg));
+
+    QCOMPARE(flipped.toPoint(), res.toQPointF().toPoint());
+}
+

src/test/ValentinaTest/tst_vpointf.h

@@ -0,0 +1,47 @@
+/************************************************************************
+ **
+ **  @file
+ **  @author Roman Telezhynskyi <dismine(at)gmail.com>
+ **  @date   10 9, 2016
+ **
+ **  @brief
+ **  @copyright
+ **  This source code is part of the Valentine project, a pattern making
+ **  program, whose allow create and modeling patterns of clothing.
+ **  Copyright (C) 2016 Valentina project
+ **  <https://bitbucket.org/dismine/valentina> All Rights Reserved.
+ **
+ **  Valentina is free software: you can redistribute it and/or modify
+ **  it under the terms of the GNU General Public License as published by
+ **  the Free Software Foundation, either version 3 of the License, or
+ **  (at your option) any later version.
+ **
+ **  Valentina is distributed in the hope that it will be useful,
+ **  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ **  GNU General Public License for more details.
+ **
+ **  You should have received a copy of the GNU General Public License
+ **  along with Valentina.  If not, see <http://www.gnu.org/licenses/>.
+ **
+ *************************************************************************/
+
+#ifndef TST_VPOINTF_H
+#define TST_VPOINTF_H
+
+#include <QtCore/QObject>
+#include <QtCore/qglobal.h>
+
+class TST_VPointF : public QObject
+{
+    Q_OBJECT
+public:
+    explicit TST_VPointF(QObject *parent = nullptr);
+private slots:
+    void TestFlip_data();
+    void TestFlip();
+private:
+    Q_DISABLE_COPY(TST_VPointF)
+};
+
+#endif // TST_VPOINTF_H