38be0d1383
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364 lines
11 KiB
C++
364 lines
11 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the test suite of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtTest/QtTest>
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#include <qgraphicsitem.h>
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#include <qgraphicstransform.h>
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#include "../../shared/util.h"
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class tst_QGraphicsTransform : public QObject {
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Q_OBJECT
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public slots:
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void initTestCase();
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void cleanupTestCase();
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void init();
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void cleanup();
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private slots:
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void scale();
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void rotation();
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void rotation3d_data();
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void rotation3d();
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void rotation3dArbitraryAxis_data();
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void rotation3dArbitraryAxis();
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};
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// This will be called before the first test function is executed.
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// It is only called once.
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void tst_QGraphicsTransform::initTestCase()
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{
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}
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// This will be called after the last test function is executed.
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// It is only called once.
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void tst_QGraphicsTransform::cleanupTestCase()
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{
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}
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// This will be called before each test function is executed.
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void tst_QGraphicsTransform::init()
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{
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}
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// This will be called after every test function.
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void tst_QGraphicsTransform::cleanup()
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{
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}
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static QTransform transform2D(const QGraphicsTransform& t)
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{
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QMatrix4x4 m;
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t.applyTo(&m);
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return m.toTransform();
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}
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void tst_QGraphicsTransform::scale()
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{
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QGraphicsScale scale;
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// check initial conditions
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QCOMPARE(scale.xScale(), qreal(1));
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QCOMPARE(scale.yScale(), qreal(1));
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QCOMPARE(scale.zScale(), qreal(1));
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QCOMPARE(scale.origin(), QVector3D(0, 0, 0));
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scale.setOrigin(QVector3D(10, 10, 0));
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QCOMPARE(scale.xScale(), qreal(1));
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QCOMPARE(scale.yScale(), qreal(1));
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QCOMPARE(scale.zScale(), qreal(1));
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QCOMPARE(scale.origin(), QVector3D(10, 10, 0));
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QMatrix4x4 t;
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scale.applyTo(&t);
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QCOMPARE(t, QMatrix4x4());
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QCOMPARE(transform2D(scale), QTransform());
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scale.setXScale(10);
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scale.setOrigin(QVector3D(0, 0, 0));
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QCOMPARE(scale.xScale(), qreal(10));
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QCOMPARE(scale.yScale(), qreal(1));
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QCOMPARE(scale.zScale(), qreal(1));
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QCOMPARE(scale.origin(), QVector3D(0, 0, 0));
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QTransform res;
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res.scale(10, 1);
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QCOMPARE(transform2D(scale), res);
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QCOMPARE(transform2D(scale).map(QPointF(10, 10)), QPointF(100, 10));
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scale.setOrigin(QVector3D(10, 10, 0));
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QCOMPARE(transform2D(scale).map(QPointF(10, 10)), QPointF(10, 10));
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QCOMPARE(transform2D(scale).map(QPointF(11, 10)), QPointF(20, 10));
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scale.setYScale(2);
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scale.setZScale(4.5);
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scale.setOrigin(QVector3D(1, 2, 3));
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QCOMPARE(scale.xScale(), qreal(10));
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QCOMPARE(scale.yScale(), qreal(2));
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QCOMPARE(scale.zScale(), qreal(4.5));
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QCOMPARE(scale.origin(), QVector3D(1, 2, 3));
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QMatrix4x4 t2;
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scale.applyTo(&t2);
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QCOMPARE(t2.map(QVector3D(4, 5, 6)), QVector3D(31, 8, 16.5));
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// Because the origin has a non-zero z, mapping (4, 5) in 2D
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// will introduce a projective component into the result.
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QTransform t3 = t2.toTransform();
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QCOMPARE(t3.map(QPointF(4, 5)), QPointF(31 / t3.m33(), 8 / t3.m33()));
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}
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// QMatrix4x4 uses float internally, whereas QTransform uses qreal.
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// This can lead to issues with qFuzzyCompare() where it uses double
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// precision to compare values that have no more than float precision
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// after conversion from QMatrix4x4 to QTransform. The following
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// definitions correct for the difference.
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static inline bool fuzzyCompare(qreal p1, qreal p2)
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{
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// increase delta on small machines using float instead of double
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if (sizeof(qreal) == sizeof(float))
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return (qAbs(p1 - p2) <= 0.00003f * qMin(qAbs(p1), qAbs(p2)));
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else
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return (qAbs(p1 - p2) <= 0.00001f * qMin(qAbs(p1), qAbs(p2)));
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}
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static bool fuzzyCompare(const QTransform& t1, const QTransform& t2)
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{
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return fuzzyCompare(t1.m11(), t2.m11()) &&
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fuzzyCompare(t1.m12(), t2.m12()) &&
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fuzzyCompare(t1.m13(), t2.m13()) &&
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fuzzyCompare(t1.m21(), t2.m21()) &&
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fuzzyCompare(t1.m22(), t2.m22()) &&
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fuzzyCompare(t1.m23(), t2.m23()) &&
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fuzzyCompare(t1.m31(), t2.m31()) &&
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fuzzyCompare(t1.m32(), t2.m32()) &&
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fuzzyCompare(t1.m33(), t2.m33());
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}
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static inline bool fuzzyCompare(const QMatrix4x4& m1, const QMatrix4x4& m2)
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{
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bool ok = true;
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for (int y = 0; y < 4; ++y)
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for (int x = 0; x < 4; ++x)
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ok &= fuzzyCompare(m1(y, x), m2(y, x));
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return ok;
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}
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void tst_QGraphicsTransform::rotation()
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{
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QGraphicsRotation rotation;
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QCOMPARE(rotation.axis(), QVector3D(0, 0, 1));
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QCOMPARE(rotation.origin(), QVector3D(0, 0, 0));
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QCOMPARE(rotation.angle(), (qreal)0);
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rotation.setOrigin(QVector3D(10, 10, 0));
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QCOMPARE(rotation.axis(), QVector3D(0, 0, 1));
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QCOMPARE(rotation.origin(), QVector3D(10, 10, 0));
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QCOMPARE(rotation.angle(), (qreal)0);
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QMatrix4x4 t;
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rotation.applyTo(&t);
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QCOMPARE(t, QMatrix4x4());
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QCOMPARE(transform2D(rotation), QTransform());
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rotation.setAngle(40);
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rotation.setOrigin(QVector3D(0, 0, 0));
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QCOMPARE(rotation.axis(), QVector3D(0, 0, 1));
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QCOMPARE(rotation.origin(), QVector3D(0, 0, 0));
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QCOMPARE(rotation.angle(), (qreal)40);
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QTransform res;
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res.rotate(40);
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QVERIFY(fuzzyCompare(transform2D(rotation), res));
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rotation.setOrigin(QVector3D(10, 10, 0));
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rotation.setAngle(90);
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QCOMPARE(transform2D(rotation).map(QPointF(10, 10)), QPointF(10, 10));
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QCOMPARE(transform2D(rotation).map(QPointF(20, 10)), QPointF(10, 20));
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rotation.setOrigin(QVector3D(0, 0, 0));
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rotation.setAngle(qQNaN());
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QCOMPARE(transform2D(rotation).map(QPointF(20, 10)), QPointF(20, 10));
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}
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Q_DECLARE_METATYPE(Qt::Axis);
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void tst_QGraphicsTransform::rotation3d_data()
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{
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QTest::addColumn<Qt::Axis>("axis");
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QTest::addColumn<qreal>("angle");
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for (int angle = 0; angle <= 360; angle++) {
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QTest::newRow("test rotation on X") << Qt::XAxis << qreal(angle);
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QTest::newRow("test rotation on Y") << Qt::YAxis << qreal(angle);
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QTest::newRow("test rotation on Z") << Qt::ZAxis << qreal(angle);
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}
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}
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void tst_QGraphicsTransform::rotation3d()
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{
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QFETCH(Qt::Axis, axis);
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QFETCH(qreal, angle);
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QGraphicsRotation rotation;
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rotation.setAxis(axis);
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QMatrix4x4 t;
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rotation.applyTo(&t);
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QVERIFY(t.isIdentity());
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QVERIFY(transform2D(rotation).isIdentity());
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rotation.setAngle(angle);
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// QGraphicsRotation uses a correct mathematical rotation in 3D.
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// QTransform's Qt::YAxis rotation is inverted from the mathematical
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// version of rotation. We correct for that here.
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QTransform expected;
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if (axis == Qt::YAxis && angle != 180.)
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expected.rotate(-angle, axis);
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else
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expected.rotate(angle, axis);
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QVERIFY(fuzzyCompare(transform2D(rotation), expected));
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// Check that "rotation" produces the 4x4 form of the 3x3 matrix.
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// i.e. third row and column are 0 0 1 0.
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t.setToIdentity();
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rotation.applyTo(&t);
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QMatrix4x4 r(expected);
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if (sizeof(qreal) == sizeof(float) && angle == 268) {
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// This test fails, on only this angle, when qreal == float
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// because the deg2rad value in QTransform is not accurate
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// enough to match what QMatrix4x4 is doing.
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} else {
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QVERIFY(fuzzyCompare(t, r));
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}
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//now let's check that a null vector will not change the transform
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rotation.setAxis(QVector3D(0, 0, 0));
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rotation.setOrigin(QVector3D(10, 10, 0));
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t.setToIdentity();
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rotation.applyTo(&t);
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QVERIFY(t.isIdentity());
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QVERIFY(transform2D(rotation).isIdentity());
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rotation.setAngle(angle);
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QVERIFY(t.isIdentity());
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QVERIFY(transform2D(rotation).isIdentity());
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rotation.setOrigin(QVector3D(0, 0, 0));
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QVERIFY(t.isIdentity());
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QVERIFY(transform2D(rotation).isIdentity());
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}
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void tst_QGraphicsTransform::rotation3dArbitraryAxis_data()
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{
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QTest::addColumn<QVector3D>("axis");
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QTest::addColumn<qreal>("angle");
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QVector3D axis1 = QVector3D(1.0f, 1.0f, 1.0f);
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QVector3D axis2 = QVector3D(2.0f, -3.0f, 0.5f);
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QVector3D axis3 = QVector3D(-2.0f, 0.0f, -0.5f);
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QVector3D axis4 = QVector3D(0.0001f, 0.0001f, 0.0001f);
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QVector3D axis5 = QVector3D(0.01f, 0.01f, 0.01f);
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for (int angle = 0; angle <= 360; angle++) {
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QTest::newRow("test rotation on (1, 1, 1)") << axis1 << qreal(angle);
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QTest::newRow("test rotation on (2, -3, .5)") << axis2 << qreal(angle);
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QTest::newRow("test rotation on (-2, 0, -.5)") << axis3 << qreal(angle);
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QTest::newRow("test rotation on (.0001, .0001, .0001)") << axis4 << qreal(angle);
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QTest::newRow("test rotation on (.01, .01, .01)") << axis5 << qreal(angle);
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}
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}
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void tst_QGraphicsTransform::rotation3dArbitraryAxis()
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{
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QFETCH(QVector3D, axis);
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QFETCH(qreal, angle);
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QGraphicsRotation rotation;
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rotation.setAxis(axis);
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QMatrix4x4 t;
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rotation.applyTo(&t);
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QVERIFY(t.isIdentity());
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QVERIFY(transform2D(rotation).isIdentity());
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rotation.setAngle(angle);
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// Compute the expected answer using QMatrix4x4 and a projection.
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// These two steps are performed in one hit by QGraphicsRotation.
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QMatrix4x4 exp;
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exp.rotate(angle, axis);
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QTransform expected = exp.toTransform(1024.0f);
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QVERIFY(fuzzyCompare(transform2D(rotation), expected));
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// Check that "rotation" produces the 4x4 form of the 3x3 matrix.
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// i.e. third row and column are 0 0 1 0.
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t.setToIdentity();
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rotation.applyTo(&t);
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QMatrix4x4 r(expected);
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QVERIFY(qFuzzyCompare(t, r));
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}
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QTEST_MAIN(tst_QGraphicsTransform)
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#include "tst_qgraphicstransform.moc"
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