diff options
Diffstat (limited to 'examples/opengl/hellogl/glwidget.cpp')
| -rw-r--r-- | examples/opengl/hellogl/glwidget.cpp | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/examples/opengl/hellogl/glwidget.cpp b/examples/opengl/hellogl/glwidget.cpp new file mode 100644 index 0000000..d81e7e6 --- /dev/null +++ b/examples/opengl/hellogl/glwidget.cpp @@ -0,0 +1,266 @@ +/**************************************************************************** +** +** 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" + +//! [0] +GLWidget::GLWidget(QWidget *parent) + : QGLWidget(parent) +{ + object = 0; + xRot = 0; + yRot = 0; + zRot = 0; + + trolltechGreen = QColor::fromCmykF(0.40, 0.0, 1.0, 0.0); + trolltechPurple = QColor::fromCmykF(0.39, 0.39, 0.0, 0.0); +} +//! [0] + +//! [1] +GLWidget::~GLWidget() +{ + makeCurrent(); + glDeleteLists(object, 1); +} +//! [1] + +//! [2] +QSize GLWidget::minimumSizeHint() const +{ + return QSize(50, 50); +} +//! [2] + +//! [3] +QSize GLWidget::sizeHint() const +//! [3] //! [4] +{ + return QSize(400, 400); +} +//! [4] + +//! [5] +void GLWidget::setXRotation(int angle) +{ + normalizeAngle(&angle); + if (angle != xRot) { + xRot = angle; + emit xRotationChanged(angle); + updateGL(); + } +} +//! [5] + +void GLWidget::setYRotation(int angle) +{ + normalizeAngle(&angle); + if (angle != yRot) { + yRot = angle; + emit yRotationChanged(angle); + updateGL(); + } +} + +void GLWidget::setZRotation(int angle) +{ + normalizeAngle(&angle); + if (angle != zRot) { + zRot = angle; + emit zRotationChanged(angle); + updateGL(); + } +} + +//! [6] +void GLWidget::initializeGL() +{ + qglClearColor(trolltechPurple.dark()); + object = makeObject(); + glShadeModel(GL_FLAT); + glEnable(GL_DEPTH_TEST); + glEnable(GL_CULL_FACE); +} +//! [6] + +//! [7] +void GLWidget::paintGL() +{ + 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(object); +} +//! [7] + +//! [8] +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); +} +//! [8] + +//! [9] +void GLWidget::mousePressEvent(QMouseEvent *event) +{ + lastPos = event->pos(); +} +//! [9] + +//! [10] +void GLWidget::mouseMoveEvent(QMouseEvent *event) +{ + int dx = event->x() - lastPos.x(); + int dy = event->y() - lastPos.y(); + + if (event->buttons() & Qt::LeftButton) { + setXRotation(xRot + 8 * dy); + setYRotation(yRot + 8 * dx); + } else if (event->buttons() & Qt::RightButton) { + setXRotation(xRot + 8 * dy); + setZRotation(zRot + 8 * dx); + } + lastPos = event->pos(); +} +//! [10] + +GLuint GLWidget::makeObject() +{ + GLuint list = glGenLists(1); + glNewList(list, GL_COMPILE); + + glBegin(GL_QUADS); + + GLdouble x1 = +0.06; + GLdouble y1 = -0.14; + GLdouble x2 = +0.14; + GLdouble y2 = -0.06; + GLdouble x3 = +0.08; + GLdouble y3 = +0.00; + GLdouble x4 = +0.30; + GLdouble y4 = +0.22; + + quad(x1, y1, x2, y2, y2, x2, y1, x1); + quad(x3, y3, x4, y4, y4, x4, y3, x3); + + extrude(x1, y1, x2, y2); + extrude(x2, y2, y2, x2); + extrude(y2, x2, y1, x1); + extrude(y1, x1, x1, y1); + extrude(x3, y3, x4, y4); + extrude(x4, y4, y4, x4); + extrude(y4, x4, y3, x3); + + const double Pi = 3.14159265358979323846; + const int NumSectors = 200; + + for (int i = 0; i < NumSectors; ++i) { + double angle1 = (i * 2 * Pi) / NumSectors; + GLdouble x5 = 0.30 * sin(angle1); + GLdouble y5 = 0.30 * cos(angle1); + GLdouble x6 = 0.20 * sin(angle1); + GLdouble y6 = 0.20 * cos(angle1); + + double angle2 = ((i + 1) * 2 * Pi) / NumSectors; + GLdouble x7 = 0.20 * sin(angle2); + GLdouble y7 = 0.20 * cos(angle2); + GLdouble x8 = 0.30 * sin(angle2); + GLdouble y8 = 0.30 * cos(angle2); + + quad(x5, y5, x6, y6, x7, y7, x8, y8); + + extrude(x6, y6, x7, y7); + extrude(x8, y8, x5, y5); + } + + glEnd(); + + glEndList(); + return list; +} + +void GLWidget::quad(GLdouble x1, GLdouble y1, GLdouble x2, GLdouble y2, + GLdouble x3, GLdouble y3, GLdouble x4, GLdouble y4) +{ + qglColor(trolltechGreen); + + glVertex3d(x1, y1, -0.05); + glVertex3d(x2, y2, -0.05); + glVertex3d(x3, y3, -0.05); + glVertex3d(x4, y4, -0.05); + + glVertex3d(x4, y4, +0.05); + glVertex3d(x3, y3, +0.05); + glVertex3d(x2, y2, +0.05); + glVertex3d(x1, y1, +0.05); +} + +void GLWidget::extrude(GLdouble x1, GLdouble y1, GLdouble x2, GLdouble y2) +{ + qglColor(trolltechGreen.dark(250 + int(100 * x1))); + + glVertex3d(x1, y1, +0.05); + glVertex3d(x2, y2, +0.05); + glVertex3d(x2, y2, -0.05); + glVertex3d(x1, y1, -0.05); +} + +void GLWidget::normalizeAngle(int *angle) +{ + while (*angle < 0) + *angle += 360 * 16; + while (*angle > 360 * 16) + *angle -= 360 * 16; +} |