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Diffstat (limited to 'tests/auto/qgraphicstransform/tst_qgraphicstransform.cpp')
-rw-r--r-- | tests/auto/qgraphicstransform/tst_qgraphicstransform.cpp | 363 |
1 files changed, 363 insertions, 0 deletions
diff --git a/tests/auto/qgraphicstransform/tst_qgraphicstransform.cpp b/tests/auto/qgraphicstransform/tst_qgraphicstransform.cpp new file mode 100644 index 0000000000..903d7e796c --- /dev/null +++ b/tests/auto/qgraphicstransform/tst_qgraphicstransform.cpp @@ -0,0 +1,363 @@ +/**************************************************************************** +** +** Copyright (C) 2011 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(); + void rotation3dArbitraryAxis_data(); + void rotation3dArbitraryAxis(); +}; + + +// 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(); +} + +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) <= 0.00003f * 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()); +} + +static inline bool fuzzyCompare(const QMatrix4x4& m1, const QMatrix4x4& m2) +{ + bool ok = true; + for (int y = 0; y < 4; ++y) + for (int x = 0; x < 4; ++x) + ok &= fuzzyCompare(m1(y, x), m2(y, x)); + return ok; +} + +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)); + + rotation.setOrigin(QVector3D(0, 0, 0)); + rotation.setAngle(qQNaN()); + QCOMPARE(transform2D(rotation).map(QPointF(20, 10)), QPointF(20, 10)); +} + +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)); + + // Check that "rotation" produces the 4x4 form of the 3x3 matrix. + // i.e. third row and column are 0 0 1 0. + t.setToIdentity(); + rotation.applyTo(&t); + QMatrix4x4 r(expected); + if (sizeof(qreal) == sizeof(float) && angle == 268) { + // This test fails, on only this angle, when qreal == float + // because the deg2rad value in QTransform is not accurate + // enough to match what QMatrix4x4 is doing. + } else { + QVERIFY(fuzzyCompare(t, r)); + } + + //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.setToIdentity(); + 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()); +} + +void tst_QGraphicsTransform::rotation3dArbitraryAxis_data() +{ + QTest::addColumn<QVector3D>("axis"); + QTest::addColumn<qreal>("angle"); + + QVector3D axis1 = QVector3D(1.0f, 1.0f, 1.0f); + QVector3D axis2 = QVector3D(2.0f, -3.0f, 0.5f); + QVector3D axis3 = QVector3D(-2.0f, 0.0f, -0.5f); + QVector3D axis4 = QVector3D(0.0001f, 0.0001f, 0.0001f); + QVector3D axis5 = QVector3D(0.01f, 0.01f, 0.01f); + + for (int angle = 0; angle <= 360; angle++) { + QTest::newRow("test rotation on (1, 1, 1)") << axis1 << qreal(angle); + QTest::newRow("test rotation on (2, -3, .5)") << axis2 << qreal(angle); + QTest::newRow("test rotation on (-2, 0, -.5)") << axis3 << qreal(angle); + QTest::newRow("test rotation on (.0001, .0001, .0001)") << axis4 << qreal(angle); + QTest::newRow("test rotation on (.01, .01, .01)") << axis5 << qreal(angle); + } +} + +void tst_QGraphicsTransform::rotation3dArbitraryAxis() +{ + QFETCH(QVector3D, axis); + QFETCH(qreal, angle); + + QGraphicsRotation rotation; + rotation.setAxis(axis); + + QMatrix4x4 t; + rotation.applyTo(&t); + + QVERIFY(t.isIdentity()); + QVERIFY(transform2D(rotation).isIdentity()); + + rotation.setAngle(angle); + + // Compute the expected answer using QMatrix4x4 and a projection. + // These two steps are performed in one hit by QGraphicsRotation. + QMatrix4x4 exp; + exp.rotate(angle, axis); + QTransform expected = exp.toTransform(1024.0f); + + QVERIFY(fuzzyCompare(transform2D(rotation), expected)); + + // Check that "rotation" produces the 4x4 form of the 3x3 matrix. + // i.e. third row and column are 0 0 1 0. + t.setToIdentity(); + rotation.applyTo(&t); + QMatrix4x4 r(expected); + QVERIFY(qFuzzyCompare(t, r)); +} + + +QTEST_MAIN(tst_QGraphicsTransform) +#include "tst_qgraphicstransform.moc" + |