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Diffstat (limited to 'examples/opengl/textures/glwidget.cpp')
| -rw-r--r-- | examples/opengl/textures/glwidget.cpp | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/examples/opengl/textures/glwidget.cpp b/examples/opengl/textures/glwidget.cpp new file mode 100644 index 0000000..5882373 --- /dev/null +++ b/examples/opengl/textures/glwidget.cpp @@ -0,0 +1,182 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the examples 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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtGui> +#include <QtOpenGL> + +#include <math.h> + +#include "glwidget.h" + +GLuint GLWidget::sharedObject = 0; +int GLWidget::refCount = 0; + +GLWidget::GLWidget(QWidget *parent, QGLWidget *shareWidget) + : QGLWidget(parent, shareWidget) +{ + clearColor = Qt::black; + xRot = 0; + yRot = 0; + zRot = 0; +} + +GLWidget::~GLWidget() +{ + if (--refCount == 0) { + makeCurrent(); + glDeleteLists(sharedObject, 1); + } +} + +QSize GLWidget::minimumSizeHint() const +{ + return QSize(50, 50); +} + +QSize GLWidget::sizeHint() const +{ + return QSize(200, 200); +} + +void GLWidget::rotateBy(int xAngle, int yAngle, int zAngle) +{ + xRot += xAngle; + yRot += yAngle; + zRot += zAngle; + updateGL(); +} + +void GLWidget::setClearColor(const QColor &color) +{ + clearColor = color; + updateGL(); +} + +void GLWidget::initializeGL() +{ + if (!sharedObject) + sharedObject = makeObject(); + ++refCount; + + glEnable(GL_DEPTH_TEST); + glEnable(GL_CULL_FACE); + glEnable(GL_TEXTURE_2D); +} + +void GLWidget::paintGL() +{ + qglClearColor(clearColor); + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + glLoadIdentity(); + glTranslated(0.0, 0.0, -10.0); + glRotated(xRot / 16.0, 1.0, 0.0, 0.0); + glRotated(yRot / 16.0, 0.0, 1.0, 0.0); + glRotated(zRot / 16.0, 0.0, 0.0, 1.0); + glCallList(sharedObject); +} + +void GLWidget::resizeGL(int width, int height) +{ + int side = qMin(width, height); + glViewport((width - side) / 2, (height - side) / 2, side, side); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glOrtho(-0.5, +0.5, +0.5, -0.5, 4.0, 15.0); + glMatrixMode(GL_MODELVIEW); +} + +void GLWidget::mousePressEvent(QMouseEvent *event) +{ + lastPos = event->pos(); +} + +void GLWidget::mouseMoveEvent(QMouseEvent *event) +{ + int dx = event->x() - lastPos.x(); + int dy = event->y() - lastPos.y(); + + if (event->buttons() & Qt::LeftButton) { + rotateBy(8 * dy, 8 * dx, 0); + } else if (event->buttons() & Qt::RightButton) { + rotateBy(8 * dy, 0, 8 * dx); + } + lastPos = event->pos(); +} + +void GLWidget::mouseReleaseEvent(QMouseEvent * /* event */) +{ + emit clicked(); +} + +GLuint GLWidget::makeObject() +{ + static const int coords[6][4][3] = { + { { +1, -1, -1 }, { -1, -1, -1 }, { -1, +1, -1 }, { +1, +1, -1 } }, + { { +1, +1, -1 }, { -1, +1, -1 }, { -1, +1, +1 }, { +1, +1, +1 } }, + { { +1, -1, +1 }, { +1, -1, -1 }, { +1, +1, -1 }, { +1, +1, +1 } }, + { { -1, -1, -1 }, { -1, -1, +1 }, { -1, +1, +1 }, { -1, +1, -1 } }, + { { +1, -1, +1 }, { -1, -1, +1 }, { -1, -1, -1 }, { +1, -1, -1 } }, + { { -1, -1, +1 }, { +1, -1, +1 }, { +1, +1, +1 }, { -1, +1, +1 } } + }; + + + GLuint textures[6]; + for (int j=0; j < 6; ++j) + textures[j] = bindTexture(QPixmap(QString(":/images/side%1.png").arg(j + 1)), + GL_TEXTURE_2D); + + GLuint list = glGenLists(1); + glNewList(list, GL_COMPILE); + for (int i = 0; i < 6; ++i) { + glBindTexture(GL_TEXTURE_2D, textures[i]); + glBegin(GL_QUADS); + for (int j = 0; j < 4; ++j) { + glTexCoord2d(j == 0 || j == 3, j == 0 || j == 1); + glVertex3d(0.2 * coords[i][j][0], 0.2 * coords[i][j][1], + 0.2 * coords[i][j][2]); + } + glEnd(); + } + + glEndList(); + return list; +} |