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+/****************************************************************************
+ **
+ ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+ ** Contact: http://www.qt-project.org/legal
+ **
+ ** This file is part of the examples of the Qt Toolkit.
+ **
+ ** $QT_BEGIN_LICENSE:BSD$
+ ** You may use this file under the terms of the BSD license as follows:
+ **
+ ** "Redistribution and use in source and binary forms, with or without
+ ** modification, are permitted provided that the following conditions are
+ ** met:
+ ** * Redistributions of source code must retain the above copyright
+ ** notice, this list of conditions and the following disclaimer.
+ ** * Redistributions in binary form must reproduce the above copyright
+ ** notice, this list of conditions and the following disclaimer in
+ ** the documentation and/or other materials provided with the
+ ** distribution.
+ ** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+ ** of its contributors may be used to endorse or promote products derived
+ ** from this software without specific prior written permission.
+ **
+ **
+ ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+ **
+ ** $QT_END_LICENSE$
+ **
+ ****************************************************************************/
+
+#include <QRasterWindow>
+#include <QPainter>
+#include <QGuiApplication>
+#include <QMatrix4x4>
+#include <QTimer>
+
+static QPainterPath painterPathForTriangle()
+{
+ static const QPointF bottomLeft(-1.0, -1.0);
+ static const QPointF top(0.0, 1.0);
+ static const QPointF bottomRight(1.0, -1.0);
+
+ QPainterPath path(bottomLeft);
+ path.lineTo(top);
+ path.lineTo(bottomRight);
+ path.closeSubpath();
+ return path;
+}
+
+class PaintedWindow : public QRasterWindow
+{
+ Q_OBJECT
+
+public:
+ PaintedWindow()
+ {
+ m_view.lookAt(QVector3D(3,1,1),
+ QVector3D(0,0,0),
+ QVector3D(0,1,0));
+ m_timer.setInterval(16);
+ connect(&m_timer, SIGNAL(timeout()), this, SLOT(update()));
+ m_timer.start();
+ }
+
+protected:
+ void paintEvent(QPaintEvent *)
+ {
+ QPainter p(this);
+ p.fillRect(QRect(0,0,width(),height()),Qt::gray);
+
+ p.setWorldTransform(m_window_matrix.toTransform());
+
+ QMatrix4x4 mvp = m_projection * m_view * m_model;
+ p.setTransform(mvp.toTransform(), true);
+
+ p.fillPath(painterPathForTriangle(), m_brush);
+
+ m_model.rotate(1, 0, 1, 0);
+ }
+
+ void resizeEvent(QResizeEvent *)
+ {
+ m_window_matrix = QTransform();
+ m_window_matrix.translate(width() / 2.0, height() / 2.0);
+ m_window_matrix.scale(width() / 2.0, -height() / 2.0);
+
+ m_projection.setToIdentity();
+ m_projection.perspective(45.f, qreal(width()) / qreal(height()), 0.1f, 100.f);
+
+ QLinearGradient gradient(QPointF(-1,-1), QPointF(1,1));
+ gradient.setColorAt(0, Qt::red);
+ gradient.setColorAt(1, Qt::green);
+
+ m_brush = QBrush(gradient);
+ }
+
+private:
+ QMatrix4x4 m_window_matrix;
+ QMatrix4x4 m_projection;
+ QMatrix4x4 m_view;
+ QMatrix4x4 m_model;
+ QBrush m_brush;
+ QTimer m_timer;
+};
+
+int main (int argc, char **argv)
+{
+ QGuiApplication app(argc, argv);
+
+ PaintedWindow window;
+ window.create();
+ window.show();
+
+ return app.exec();
+}
+
+#include "main.moc"