48e0c4df23
Change-Id: Ic804938fc352291d011800d21e549c10acac66fb Reviewed-by: Lars Knoll <lars.knoll@digia.com>
200 lines
4.9 KiB
C++
200 lines
4.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
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** of its contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtWidgets>
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#include <QtOpenGL>
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#include <math.h>
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#include "glwidget.h"
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#include "qtlogo.h"
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#ifndef GL_MULTISAMPLE
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#define GL_MULTISAMPLE 0x809D
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#endif
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//! [0]
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GLWidget::GLWidget(QWidget *parent)
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: QGLWidget(QGLFormat(QGL::SampleBuffers), parent)
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{
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logo = 0;
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xRot = 0;
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yRot = 0;
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zRot = 0;
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qtGreen = QColor::fromCmykF(0.40, 0.0, 1.0, 0.0);
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qtPurple = QColor::fromCmykF(0.39, 0.39, 0.0, 0.0);
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}
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//! [0]
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//! [1]
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GLWidget::~GLWidget()
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{
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}
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//! [1]
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//! [2]
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QSize GLWidget::minimumSizeHint() const
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{
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return QSize(50, 50);
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}
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//! [2]
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//! [3]
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QSize GLWidget::sizeHint() const
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//! [3] //! [4]
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{
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return QSize(400, 400);
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}
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//! [4]
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static void qNormalizeAngle(int &angle)
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{
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while (angle < 0)
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angle += 360 * 16;
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while (angle > 360 * 16)
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angle -= 360 * 16;
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}
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//! [5]
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void GLWidget::setXRotation(int angle)
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{
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qNormalizeAngle(angle);
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if (angle != xRot) {
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xRot = angle;
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emit xRotationChanged(angle);
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updateGL();
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}
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}
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//! [5]
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void GLWidget::setYRotation(int angle)
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{
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qNormalizeAngle(angle);
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if (angle != yRot) {
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yRot = angle;
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emit yRotationChanged(angle);
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updateGL();
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}
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}
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void GLWidget::setZRotation(int angle)
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{
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qNormalizeAngle(angle);
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if (angle != zRot) {
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zRot = angle;
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emit zRotationChanged(angle);
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updateGL();
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}
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}
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//! [6]
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void GLWidget::initializeGL()
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{
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qglClearColor(qtPurple.dark());
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logo = new QtLogo(this, 64);
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logo->setColor(qtGreen.dark());
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glEnable(GL_DEPTH_TEST);
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glEnable(GL_CULL_FACE);
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glShadeModel(GL_SMOOTH);
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glEnable(GL_LIGHTING);
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glEnable(GL_LIGHT0);
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glEnable(GL_MULTISAMPLE);
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static GLfloat lightPosition[4] = { 0.5, 5.0, 7.0, 1.0 };
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glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
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}
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//! [6]
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//! [7]
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void GLWidget::paintGL()
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{
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glLoadIdentity();
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glTranslatef(0.0, 0.0, -10.0);
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glRotatef(xRot / 16.0, 1.0, 0.0, 0.0);
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glRotatef(yRot / 16.0, 0.0, 1.0, 0.0);
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glRotatef(zRot / 16.0, 0.0, 0.0, 1.0);
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logo->draw();
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}
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//! [7]
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//! [8]
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void GLWidget::resizeGL(int width, int height)
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{
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int side = qMin(width, height);
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glViewport((width - side) / 2, (height - side) / 2, side, side);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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#ifdef QT_OPENGL_ES_1
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glOrthof(-0.5, +0.5, -0.5, +0.5, 4.0, 15.0);
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#else
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glOrtho(-0.5, +0.5, -0.5, +0.5, 4.0, 15.0);
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#endif
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glMatrixMode(GL_MODELVIEW);
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}
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//! [8]
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//! [9]
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void GLWidget::mousePressEvent(QMouseEvent *event)
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{
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lastPos = event->pos();
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}
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//! [9]
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//! [10]
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void GLWidget::mouseMoveEvent(QMouseEvent *event)
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{
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int dx = event->x() - lastPos.x();
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int dy = event->y() - lastPos.y();
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if (event->buttons() & Qt::LeftButton) {
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setXRotation(xRot + 8 * dy);
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setYRotation(yRot + 8 * dx);
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} else if (event->buttons() & Qt::RightButton) {
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setXRotation(xRot + 8 * dy);
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setZRotation(zRot + 8 * dx);
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}
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lastPos = event->pos();
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}
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//! [10]
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