Flipping VArc.

--HG--
branch : feature

src/libs/vgeometry/varc.cpp

@@ -131,6 +131,20 @@ VArc VArc::Rotate(const QPointF &originPoint, qreal degrees, const QString &pref
     return arc;
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+VArc VArc::Flip(const QLineF &axis, const QString &prefix) const
+{
+    const VPointF center = GetCenter().Flip(axis);
+
+    const QPointF p1 = VPointF::FlipPF(axis, GetP1());
+    const QPointF p2 = VPointF::FlipPF(axis, GetP2());
+
+    VArc arc(center, GetRadius(), QLineF(center, p1).angle(), QLineF(center, p2).angle());
+    arc.setName(name() + prefix);
+    arc.SetFlipped(true);
+    return arc;
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 VArc::~VArc()
 {}

src/libs/vgeometry/varc.h

@@ -63,6 +63,7 @@ public:
     VArc(const VArc &arc);
     VArc& operator= (const VArc &arc);
     VArc Rotate(const QPointF &originPoint, qreal degrees, const QString &prefix = QString()) const;
+    VArc Flip(const QLineF &axis, const QString &prefix = QString()) const;
     virtual ~VArc() Q_DECL_OVERRIDE;
 
     QString GetFormulaRadius () const;

src/libs/vgeometry/vpointf.cpp

@@ -117,8 +117,7 @@ VPointF VPointF::Rotate(const QPointF &originPoint, qreal degrees, const QString
 //---------------------------------------------------------------------------------------------------------------------
 VPointF VPointF::Flip(const QLineF &axis, const QString &prefix) const
 {
-    const QTransform matrix = FlippingMatrix(axis);
-    const QPointF p = matrix.map(toQPointF());
+    const QPointF p = FlipPF(axis, toQPointF());
     return VPointF(p, name() + prefix, mx(), my());
 }
 
@@ -215,3 +214,10 @@ QPointF VPointF::RotatePF(const QPointF &originPoint, const QPointF &point, qrea
     axis.setAngle(axis.angle() + degrees);
     return axis.p2();
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+QPointF VPointF::FlipPF(const QLineF &axis, const QPointF &point)
+{
+    const QTransform matrix = FlippingMatrix(axis);
+    return matrix.map(point);
+}

src/libs/vgeometry/vpointf.h

@@ -77,6 +77,7 @@ public:
     void    setY(const qreal &value);
 
     static QPointF RotatePF(const QPointF &originPoint, const QPointF &point, qreal degrees);
+    static QPointF FlipPF(const QLineF &axis, const QPointF &point);
 private:
     QSharedDataPointer<VPointFData> d;
 };

src/test/ValentinaTest/tst_varc.cpp

@@ -246,3 +246,74 @@ void TST_VArc::TestRotation()
     const QString errorMsg = QString("The name doesn't contain the prefix '%1'.").arg(prefix);
     QVERIFY2(rotatedArc.name().endsWith(prefix), qUtf8Printable(errorMsg));
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+void TST_VArc::TestFlip_data()
+{
+    QTest::addColumn<QPointF>("center");
+    QTest::addColumn<qreal>("radius");
+    QTest::addColumn<qreal>("startAngle");
+    QTest::addColumn<qreal>("endAngle");
+    QTest::addColumn<QLineF>("axis");
+    QTest::addColumn<QString>("prefix");
+
+    const qreal radius = 5;
+    QPointF center(10, 5);
+
+    QPointF p1(10, 0);
+    QPointF p2(5, 5);
+
+    QLineF axis(QPointF(4, 6), QPointF(12, 6));
+
+    QTest::newRow("Vertical axis") << 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";
+
+    QLineF l(center.x(), center.y(), center.x() + radius, center.y());
+
+    l.setAngle(45);
+    p2 = l.p2();
+
+    l.setAngle(225);
+    p1 = l.p2();
+
+    l.setAngle(45+90);
+    l.setLength(5);
+
+    const QPointF p1Axis = l.p2();
+    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";
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void TST_VArc::TestFlip()
+{
+    QFETCH(QPointF, center);
+    QFETCH(qreal, radius);
+    QFETCH(qreal, startAngle);
+    QFETCH(qreal, endAngle);
+    QFETCH(QLineF, axis);
+    QFETCH(QString, prefix);
+
+    VArc originArc(center, radius, startAngle, endAngle);
+    const VArc res = originArc.Flip(axis, prefix);
+
+    const QString errorMsg = QString("The name doesn't contain the prefix '%1'.").arg(prefix);
+    QVERIFY2(res.name().endsWith(prefix), qUtf8Printable(errorMsg));
+
+    QVERIFY2(res.IsFlipped(), qUtf8Printable("The arc is not flipped"));
+
+    QCOMPARE(originArc.GetLength()*-1, res.GetLength());
+    QCOMPARE(originArc.GetRadius(), res.GetRadius());
+    QCOMPARE(originArc.AngleArc(), res.AngleArc());
+}

src/test/ValentinaTest/tst_varc.h

@@ -44,6 +44,8 @@ private slots:
     void TestGetPoints();
     void TestRotation_data();
     void TestRotation();
+    void TestFlip_data();
+    void TestFlip();
 };
 
 #endif // TST_VARC_H