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// Copyright (C) 2024 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QTest>
#include <QtQuick>
#include <QtQuick/private/qquicktranslate_p.h>
QT_BEGIN_NAMESPACE
class tst_qquicktransform : public QObject
{
Q_OBJECT
private slots:
void shearTransform();
void rotationDistanceToPlane();
};
void tst_qquicktransform::shearTransform()
{
const QRect rect(10, 20, 100, 200);
{
QQuickShear shear;
shear.setXFactor(1.0);
shear.setOrigin(QVector3D(rect.topLeft()));
QMatrix4x4 matrix;
shear.applyTo(&matrix);
QRect mappedRect = matrix.mapRect(rect);
QCOMPARE(mappedRect.topLeft(), rect.topLeft());
QCOMPARE(mappedRect.bottomRight(), rect.bottomRight() + QPoint(rect.height(), 0.0));
}
{
QQuickShear shear;
shear.setOrigin(QVector3D(rect.topLeft()));
shear.setYFactor(0.5);
QMatrix4x4 matrix;
shear.applyTo(&matrix);
QRect mappedRect = matrix.mapRect(rect);
QCOMPARE(mappedRect.topLeft(), rect.topLeft());
QCOMPARE(mappedRect.bottomRight(), rect.bottomRight() + QPoint(0.0, rect.width() * 0.5));
}
{
QQuickShear shear;
shear.setOrigin(QVector3D(rect.topLeft()));
shear.setXFactor(1.0);
shear.setYFactor(0.5);
QMatrix4x4 matrix;
shear.applyTo(&matrix);
QRect mappedRect = matrix.mapRect(rect);
QCOMPARE(mappedRect.topLeft(), rect.topLeft());
QCOMPARE(mappedRect.bottomRight(), rect.bottomRight() + QPoint(rect.height(), rect.width() * 0.5));
}
{
QQuickShear shear;
shear.setOrigin(QVector3D(rect.topLeft()));
shear.setXFactor(0.5);
shear.setXAngle(qAtan(0.5) * 180.0 / M_PI);
QMatrix4x4 matrix;
shear.applyTo(&matrix);
QRect mappedRect = matrix.mapRect(rect);
QCOMPARE(mappedRect.topLeft(), rect.topLeft());
QCOMPARE(mappedRect.bottomRight(), rect.bottomRight() + QPoint(rect.height(), 0.0));
}
{
QQuickShear shear;
shear.setOrigin(QVector3D(rect.topLeft()));
shear.setYFactor(0.25);
shear.setYAngle(qAtan(0.25) * 180.0 / M_PI);
QMatrix4x4 matrix;
shear.applyTo(&matrix);
QRect mappedRect = matrix.mapRect(rect);
QCOMPARE(mappedRect.topLeft(), rect.topLeft());
QCOMPARE(mappedRect.bottomRight(), rect.bottomRight() + QPoint(0.0, rect.width() * 0.5));
}
}
void tst_qquicktransform::rotationDistanceToPlane()
{
const QRect testRect(100, 100, 3840, 2160);
const QPoint topLeft = testRect.topLeft();
const QPoint topRight = testRect.topRight();
const QPoint bottomLeft = testRect.bottomLeft();
const QPoint bottomRight = testRect.bottomRight();
{ // distanceToPlane = 1024
QQuickRotation rotation;
rotation.setAngle(-45.0);
rotation.setAxis(QVector3D(0, 1, 0));
rotation.setOrigin(QVector3D(2020, 1180, 0));
QMatrix4x4 matrix;
rotation.applyTo(&matrix);
QRect mappedRect = matrix.mapRect(testRect);
QRect expectedRect(-2147, -2135, 3583, 6630);
QCOMPARE(mappedRect, expectedRect);
QPoint mappedTopLeft = matrix.map(topLeft);
QPoint mappedTopRight = matrix.map(topRight);
QPoint mappedBottomLeft = matrix.map(bottomLeft);
QPoint mappedBottomRight = matrix.map(bottomRight);
QCOMPARE(mappedTopLeft, QPoint(1436, 716));
QCOMPARE(mappedTopRight, QPoint(-2153, 4502));
QCOMPARE(mappedBottomLeft, QPoint(1436, 1644));
QCOMPARE(mappedBottomRight, QPoint(-2153, -2139));
}
{ // distanceToPlane = 2048
QQuickRotation rotation;
rotation.setAngle(-45.0);
rotation.setAxis(QVector3D(0, 1, 0));
rotation.setOrigin(QVector3D(2020, 1180, 0));
rotation.setDistanceToPlane(2048.0);
QMatrix4x4 matrix;
rotation.applyTo(&matrix);
QRect mappedRect = matrix.mapRect(testRect);
QRect expectedRect(1204, -2024, 4844, 6408);
QCOMPARE(mappedRect, expectedRect);
QPoint mappedTopLeft = matrix.map(topLeft);
QPoint mappedTopRight = matrix.map(topRight);
QPoint mappedBottomLeft = matrix.map(bottomLeft);
QPoint mappedBottomRight = matrix.map(bottomRight);
QCOMPARE(mappedTopLeft, QPoint(1204, 531));
QCOMPARE(mappedTopRight, QPoint(6041, -2021));
QCOMPARE(mappedBottomLeft, QPoint(1204, 1829));
QCOMPARE(mappedBottomRight, QPoint(6041, 4378));
}
{ // distanceToPlane = 512
QQuickRotation rotation;
rotation.setAngle(-45.0);
rotation.setAxis(QVector3D(0, 1, 0));
rotation.setOrigin(QVector3D(2020, 1180, 0));
rotation.setDistanceToPlane(512.0);
QMatrix4x4 matrix;
rotation.applyTo(&matrix);
QRect mappedRect = matrix.mapRect(testRect);
QRect expectedRect(1198, 526, 450, 1308);
QCOMPARE(mappedRect, expectedRect);
QPoint mappedTopLeft = matrix.map(topLeft);
QPoint mappedTopRight = matrix.map(topRight);
QPoint mappedBottomLeft = matrix.map(bottomLeft);
QPoint mappedBottomRight = matrix.map(bottomRight);
QCOMPARE(mappedTopLeft, QPoint(1648, 884));
QCOMPARE(mappedTopRight, QPoint(1198, 1834));
QCOMPARE(mappedBottomLeft, QPoint(1648, 1475));
QCOMPARE(mappedBottomRight, QPoint(1198, 526));
}
{ // distanceToPlane = 0
QQuickRotation rotation;
rotation.setAngle(-45.0);
rotation.setAxis(QVector3D(0, 1, 0));
rotation.setOrigin(QVector3D(2020, 1180, 0));
rotation.setDistanceToPlane(0.0);
QMatrix4x4 matrix;
rotation.applyTo(&matrix);
QRect mappedRect = matrix.mapRect(testRect);
QRect expectedRect(662, 100, 2716, 2160);
QCOMPARE(mappedRect, expectedRect);
QPoint mappedTopLeft = matrix.map(topLeft);
QPoint mappedTopRight = matrix.map(topRight);
QPoint mappedBottomLeft = matrix.map(bottomLeft);
QPoint mappedBottomRight = matrix.map(bottomRight);
QCOMPARE(mappedTopLeft, QPoint(662, 100));
QCOMPARE(mappedTopRight, QPoint(3377, 100));
QCOMPARE(mappedBottomLeft, QPoint(662, 2259));
QCOMPARE(mappedBottomRight, QPoint(3377, 2259));
}
// Test Z-axis rotation - distanceToPlane should have no effect
{
QQuickRotation rotation1;
rotation1.setAngle(45.0);
rotation1.setAxis(QVector3D(0, 0, 1));
rotation1.setOrigin(QVector3D(2020, 1180, 0));
// Use default distanceToPlane = 1024.0
QMatrix4x4 matrix1;
rotation1.applyTo(&matrix1);
QRect mappedRect1 = matrix1.mapRect(testRect);
QPoint mappedTopLeft1 = matrix1.map(topLeft);
QPoint mappedTopRight1 = matrix1.map(topRight);
QPoint mappedBottomLeft1 = matrix1.map(bottomLeft);
QPoint mappedBottomRight1 = matrix1.map(bottomRight);
// Test with different distanceToPlane values
qreal distanceValues[] = {2048.0, 512.0, 0.0};
for (int i = 0; i < 3; i++) {
QQuickRotation rotation2;
rotation2.setAngle(45.0);
rotation2.setAxis(QVector3D(0, 0, 1));
rotation2.setOrigin(QVector3D(2020, 1180, 0));
rotation2.setDistanceToPlane(distanceValues[i]);
QMatrix4x4 matrix2;
rotation2.applyTo(&matrix2);
QRect mappedRect2 = matrix2.mapRect(testRect);
QPoint mappedTopLeft2 = matrix2.map(topLeft);
QPoint mappedTopRight2 = matrix2.map(topRight);
QPoint mappedBottomLeft2 = matrix2.map(bottomLeft);
QPoint mappedBottomRight2 = matrix2.map(bottomRight);
// Z-axis rotation should be identical regardless of distanceToPlane
QCOMPARE(mappedRect2, mappedRect1);
QCOMPARE(mappedTopLeft2, mappedTopLeft1);
QCOMPARE(mappedTopRight2, mappedTopRight1);
QCOMPARE(mappedBottomLeft2, mappedBottomLeft1);
QCOMPARE(mappedBottomRight2, mappedBottomRight1);
}
// Verify the actual Z-axis rotation result
QRect expectedRect(-101, -941, 4242, 4242);
QCOMPARE(mappedRect1, expectedRect);
QCOMPARE(mappedTopLeft1, QPoint(1426, -941));
QCOMPARE(mappedTopRight1, QPoint(4141, 1773));
QCOMPARE(mappedBottomLeft1, QPoint(-101, 585));
QCOMPARE(mappedBottomRight1, QPoint(2614, 3300));
}
}
QT_END_NAMESPACE
QTEST_MAIN(tst_qquicktransform)
#include "tst_qquicktransform.moc"
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