--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/auto/qgraphicstransform/tst_qgraphicstransform.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,282 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include <QtTest/QtTest>
+#include <qgraphicsitem.h>
+#include <qgraphicstransform.h>
+#include "../../shared/util.h"
+
+class tst_QGraphicsTransform : public QObject {
+ Q_OBJECT
+
+public slots:
+ void initTestCase();
+ void cleanupTestCase();
+ void init();
+ void cleanup();
+
+private slots:
+ void scale();
+ void rotation();
+ void rotation3d_data();
+ void rotation3d();
+};
+
+
+// This will be called before the first test function is executed.
+// It is only called once.
+void tst_QGraphicsTransform::initTestCase()
+{
+}
+
+// This will be called after the last test function is executed.
+// It is only called once.
+void tst_QGraphicsTransform::cleanupTestCase()
+{
+}
+
+// This will be called before each test function is executed.
+void tst_QGraphicsTransform::init()
+{
+}
+
+// This will be called after every test function.
+void tst_QGraphicsTransform::cleanup()
+{
+}
+
+static QTransform transform2D(const QGraphicsTransform& t)
+{
+ QMatrix4x4 m;
+ t.applyTo(&m);
+ return m.toTransform(0);
+}
+
+void tst_QGraphicsTransform::scale()
+{
+ QGraphicsScale scale;
+
+ // check initial conditions
+ QCOMPARE(scale.xScale(), qreal(1));
+ QCOMPARE(scale.yScale(), qreal(1));
+ QCOMPARE(scale.zScale(), qreal(1));
+ QCOMPARE(scale.origin(), QVector3D(0, 0, 0));
+
+ scale.setOrigin(QVector3D(10, 10, 0));
+
+ QCOMPARE(scale.xScale(), qreal(1));
+ QCOMPARE(scale.yScale(), qreal(1));
+ QCOMPARE(scale.zScale(), qreal(1));
+ QCOMPARE(scale.origin(), QVector3D(10, 10, 0));
+
+ QMatrix4x4 t;
+ scale.applyTo(&t);
+
+ QCOMPARE(t, QMatrix4x4());
+ QCOMPARE(transform2D(scale), QTransform());
+
+ scale.setXScale(10);
+ scale.setOrigin(QVector3D(0, 0, 0));
+
+ QCOMPARE(scale.xScale(), qreal(10));
+ QCOMPARE(scale.yScale(), qreal(1));
+ QCOMPARE(scale.zScale(), qreal(1));
+ QCOMPARE(scale.origin(), QVector3D(0, 0, 0));
+
+ QTransform res;
+ res.scale(10, 1);
+
+ QCOMPARE(transform2D(scale), res);
+ QCOMPARE(transform2D(scale).map(QPointF(10, 10)), QPointF(100, 10));
+
+ scale.setOrigin(QVector3D(10, 10, 0));
+ QCOMPARE(transform2D(scale).map(QPointF(10, 10)), QPointF(10, 10));
+ QCOMPARE(transform2D(scale).map(QPointF(11, 10)), QPointF(20, 10));
+
+ scale.setYScale(2);
+ scale.setZScale(4.5);
+ scale.setOrigin(QVector3D(1, 2, 3));
+
+ QCOMPARE(scale.xScale(), qreal(10));
+ QCOMPARE(scale.yScale(), qreal(2));
+ QCOMPARE(scale.zScale(), qreal(4.5));
+ QCOMPARE(scale.origin(), QVector3D(1, 2, 3));
+
+ QMatrix4x4 t2;
+ scale.applyTo(&t2);
+
+ QCOMPARE(t2.map(QVector3D(4, 5, 6)), QVector3D(31, 8, 16.5));
+
+ // Because the origin has a non-zero z, mapping (4, 5) in 2D
+ // will introduce a projective component into the result.
+ QTransform t3 = t2.toTransform();
+ QCOMPARE(t3.map(QPointF(4, 5)), QPointF(31 / t3.m33(), 8 / t3.m33()));
+}
+
+// QMatrix4x4 uses float internally, whereas QTransform uses qreal.
+// This can lead to issues with qFuzzyCompare() where it uses double
+// precision to compare values that have no more than float precision
+// after conversion from QMatrix4x4 to QTransform. The following
+// definitions correct for the difference.
+static inline bool fuzzyCompare(qreal p1, qreal p2)
+{
+ // increase delta on small machines using float instead of double
+ if (sizeof(qreal) == sizeof(float))
+ return (qAbs(p1 - p2) <= 0.00002f * qMin(qAbs(p1), qAbs(p2)));
+ else
+ return (qAbs(p1 - p2) <= 0.00001f * qMin(qAbs(p1), qAbs(p2)));
+}
+static bool fuzzyCompare(const QTransform& t1, const QTransform& t2)
+{
+ return fuzzyCompare(t1.m11(), t2.m11()) &&
+ fuzzyCompare(t1.m12(), t2.m12()) &&
+ fuzzyCompare(t1.m13(), t2.m13()) &&
+ fuzzyCompare(t1.m21(), t2.m21()) &&
+ fuzzyCompare(t1.m22(), t2.m22()) &&
+ fuzzyCompare(t1.m23(), t2.m23()) &&
+ fuzzyCompare(t1.m31(), t2.m31()) &&
+ fuzzyCompare(t1.m32(), t2.m32()) &&
+ fuzzyCompare(t1.m33(), t2.m33());
+}
+
+void tst_QGraphicsTransform::rotation()
+{
+ QGraphicsRotation rotation;
+ QCOMPARE(rotation.axis(), QVector3D(0, 0, 1));
+ QCOMPARE(rotation.origin(), QVector3D(0, 0, 0));
+ QCOMPARE(rotation.angle(), (qreal)0);
+
+ rotation.setOrigin(QVector3D(10, 10, 0));
+
+ QCOMPARE(rotation.axis(), QVector3D(0, 0, 1));
+ QCOMPARE(rotation.origin(), QVector3D(10, 10, 0));
+ QCOMPARE(rotation.angle(), (qreal)0);
+
+ QMatrix4x4 t;
+ rotation.applyTo(&t);
+
+ QCOMPARE(t, QMatrix4x4());
+ QCOMPARE(transform2D(rotation), QTransform());
+
+ rotation.setAngle(40);
+ rotation.setOrigin(QVector3D(0, 0, 0));
+
+ QCOMPARE(rotation.axis(), QVector3D(0, 0, 1));
+ QCOMPARE(rotation.origin(), QVector3D(0, 0, 0));
+ QCOMPARE(rotation.angle(), (qreal)40);
+
+ QTransform res;
+ res.rotate(40);
+
+ QVERIFY(fuzzyCompare(transform2D(rotation), res));
+
+ rotation.setOrigin(QVector3D(10, 10, 0));
+ rotation.setAngle(90);
+ QCOMPARE(transform2D(rotation).map(QPointF(10, 10)), QPointF(10, 10));
+ QCOMPARE(transform2D(rotation).map(QPointF(20, 10)), QPointF(10, 20));
+}
+
+Q_DECLARE_METATYPE(Qt::Axis);
+void tst_QGraphicsTransform::rotation3d_data()
+{
+ QTest::addColumn<Qt::Axis>("axis");
+ QTest::addColumn<qreal>("angle");
+
+ for (int angle = 0; angle <= 360; angle++) {
+ QTest::newRow("test rotation on X") << Qt::XAxis << qreal(angle);
+ QTest::newRow("test rotation on Y") << Qt::YAxis << qreal(angle);
+ QTest::newRow("test rotation on Z") << Qt::ZAxis << qreal(angle);
+ }
+}
+
+void tst_QGraphicsTransform::rotation3d()
+{
+ QFETCH(Qt::Axis, axis);
+ QFETCH(qreal, angle);
+
+ QGraphicsRotation rotation;
+ rotation.setAxis(axis);
+
+ QMatrix4x4 t;
+ rotation.applyTo(&t);
+
+ QVERIFY(t.isIdentity());
+ QVERIFY(transform2D(rotation).isIdentity());
+
+ rotation.setAngle(angle);
+
+ // QGraphicsRotation uses a correct mathematical rotation in 3D.
+ // QTransform's Qt::YAxis rotation is inverted from the mathematical
+ // version of rotation. We correct for that here.
+ QTransform expected;
+ if (axis == Qt::YAxis && angle != 180.)
+ expected.rotate(-angle, axis);
+ else
+ expected.rotate(angle, axis);
+
+ QVERIFY(fuzzyCompare(transform2D(rotation), expected));
+
+ //now let's check that a null vector will not change the transform
+ rotation.setAxis(QVector3D(0, 0, 0));
+ rotation.setOrigin(QVector3D(10, 10, 0));
+
+ t.setIdentity();
+ rotation.applyTo(&t);
+
+ QVERIFY(t.isIdentity());
+ QVERIFY(transform2D(rotation).isIdentity());
+
+ rotation.setAngle(angle);
+
+ QVERIFY(t.isIdentity());
+ QVERIFY(transform2D(rotation).isIdentity());
+
+ rotation.setOrigin(QVector3D(0, 0, 0));
+
+ QVERIFY(t.isIdentity());
+ QVERIFY(transform2D(rotation).isIdentity());
+}
+
+
+QTEST_MAIN(tst_QGraphicsTransform)
+#include "tst_qgraphicstransform.moc"
+