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Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">glwidget.cpp Example File</h1> <span class="small-subtitle">opengl/pbuffers2/glwidget.cpp</span> <!-- $$$opengl/pbuffers2/glwidget.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2015 The Qt Company Ltd. ** Contact: http://www.qt.io/licensing/ ** ** 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 The Qt Company Ltd 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." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include <QtGui/QImage></span> <span class="preprocessor">#include "glwidget.h"</span> <span class="preprocessor">#include <math.h></span> <span class="preprocessor">#ifndef GL_MULTISAMPLE</span> <span class="preprocessor">#define GL_MULTISAMPLE 0x809D</span> <span class="preprocessor">#endif</span> GLWidget<span class="operator">::</span>GLWidget(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qglwidget.html">QGLWidget</a></span>(<span class="type"><a href="qglformat.html">QGLFormat</a></span>(QGL<span class="operator">::</span>SampleBuffers)<span class="operator">,</span> parent) { setWindowTitle(tr(<span class="string">"OpenGL pbuffers 2"</span>)); pbuffer <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qglpixelbuffer.html">QGLPixelBuffer</a></span>(<span class="number">1024</span><span class="operator">,</span> <span class="number">1024</span><span class="operator">,</span> format()<span class="operator">,</span> <span class="keyword">this</span>); rot_x <span class="operator">=</span> rot_y <span class="operator">=</span> rot_z <span class="operator">=</span> <span class="number">0.0f</span>; scale <span class="operator">=</span> <span class="number">0.1f</span>; anim <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtimeline.html">QTimeLine</a></span>(<span class="number">750</span><span class="operator">,</span> <span class="keyword">this</span>); anim<span class="operator">-</span><span class="operator">></span>setUpdateInterval(<span class="number">20</span>); connect(anim<span class="operator">,</span> SIGNAL(valueChanged(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>))<span class="operator">,</span> SLOT(animate(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>))); connect(anim<span class="operator">,</span> SIGNAL(finished())<span class="operator">,</span> SLOT(animFinished())); svg_renderer <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qsvgrenderer.html">QSvgRenderer</a></span>(QLatin1String(<span class="string">":/res/bubbles.svg"</span>)<span class="operator">,</span> <span class="keyword">this</span>); connect(svg_renderer<span class="operator">,</span> SIGNAL(repaintNeeded())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(draw())); logo <span class="operator">=</span> <span class="type"><a href="qimage.html">QImage</a></span>(<span class="string">":/res/designer.png"</span>); logo <span class="operator">=</span> logo<span class="operator">.</span>convertToFormat(<span class="type"><a href="qimage.html">QImage</a></span><span class="operator">::</span>Format_ARGB32); makeCurrent(); <span class="comment">// need a current context to create the display list</span> tile_list <span class="operator">=</span> glGenLists(<span class="number">1</span>); glNewList(tile_list<span class="operator">,</span> GL_COMPILE); glBegin(GL_QUADS); { glTexCoord2f(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">0.0f</span>); glVertex3f(<span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glTexCoord2f(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">0.0f</span>); glVertex3f( <span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glTexCoord2f(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glVertex3f( <span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glTexCoord2f(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glVertex3f(<span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glTexCoord2f(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">0.0f</span>); glVertex3f(<span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span>); glTexCoord2f(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glVertex3f(<span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span>); glTexCoord2f(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glVertex3f( <span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span>); glTexCoord2f(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">0.0f</span>); glVertex3f( <span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span>); glTexCoord2f(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glVertex3f(<span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span>); glTexCoord2f(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">0.0f</span>); glVertex3f(<span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glTexCoord2f(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">0.0f</span>); glVertex3f( <span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glTexCoord2f(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glVertex3f( <span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span>); glTexCoord2f(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glVertex3f(<span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span>); glTexCoord2f(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glVertex3f( <span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span>); glTexCoord2f(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">0.0f</span>); glVertex3f( <span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glTexCoord2f(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">0.0f</span>); glVertex3f(<span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glTexCoord2f(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">0.0f</span>); glVertex3f( <span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span>); glTexCoord2f(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glVertex3f( <span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span>); glTexCoord2f(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glVertex3f( <span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glTexCoord2f(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">0.0f</span>); glVertex3f( <span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glTexCoord2f(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">0.0f</span>); glVertex3f(<span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span>); glTexCoord2f(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">0.0f</span>); glVertex3f(<span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glTexCoord2f(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glVertex3f(<span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glTexCoord2f(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glVertex3f(<span class="operator">-</span><span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0f</span>); } glEnd(); glEndList(); wave <span class="operator">=</span> <span class="keyword">new</span> GLfloat<span class="operator">[</span>logo<span class="operator">.</span>width()<span class="operator">*</span>logo<span class="operator">.</span>height()<span class="operator">]</span>; memset(wave<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> logo<span class="operator">.</span>width()<span class="operator">*</span>logo<span class="operator">.</span>height()); startTimer(<span class="number">30</span>); <span class="comment">// wave timer</span> pbuffer<span class="operator">-</span><span class="operator">></span>makeCurrent(); dynamicTexture <span class="operator">=</span> pbuffer<span class="operator">-</span><span class="operator">></span>generateDynamicTexture(); <span class="comment">// bind the dynamic texture to the pbuffer - this is a no-op under X11</span> hasDynamicTextureUpdate <span class="operator">=</span> pbuffer<span class="operator">-</span><span class="operator">></span>bindToDynamicTexture(dynamicTexture); } GLWidget<span class="operator">::</span><span class="operator">~</span>GLWidget() { <span class="keyword">delete</span><span class="operator">[</span><span class="operator">]</span> wave; glDeleteLists(tile_list<span class="operator">,</span> <span class="number">1</span>); pbuffer<span class="operator">-</span><span class="operator">></span>releaseFromDynamicTexture(); glDeleteTextures(<span class="number">1</span><span class="operator">,</span> <span class="operator">&</span>dynamicTexture); <span class="keyword">delete</span> pbuffer; } <span class="type">void</span> GLWidget<span class="operator">::</span>paintEvent(<span class="type"><a href="qpaintevent.html">QPaintEvent</a></span> <span class="operator">*</span>) { draw(); } <span class="type">void</span> GLWidget<span class="operator">::</span>draw() { <span class="type"><a href="qpainter.html">QPainter</a></span> p(<span class="keyword">this</span>); <span class="comment">// used for text overlay</span> <span class="comment">// save the GL state set for QPainter</span> p<span class="operator">.</span>beginNativePainting(); saveGLState(); <span class="comment">// render the 'bubbles.svg' file into our pbuffer</span> <span class="type"><a href="qpainter.html">QPainter</a></span> pbuffer_painter(pbuffer); svg_renderer<span class="operator">-</span><span class="operator">></span>render(<span class="operator">&</span>pbuffer_painter); pbuffer_painter<span class="operator">.</span>end(); glFlush(); <span class="comment">// rendering directly to a texture is not supported on X11 and</span> <span class="comment">// some Windows implementations, unfortunately</span> <span class="keyword">if</span> (<span class="operator">!</span>hasDynamicTextureUpdate) pbuffer<span class="operator">-</span><span class="operator">></span>updateDynamicTexture(dynamicTexture); makeCurrent(); <span class="comment">// draw into the GL widget</span> glClear(GL_COLOR_BUFFER_BIT <span class="operator">|</span> GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glFrustum(<span class="operator">-</span><span class="number">1</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> <span class="number">100</span>); glTranslatef(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">0.0f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">15.0f</span>); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glViewport(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> width()<span class="operator">,</span> height()); glBindTexture(GL_TEXTURE_2D<span class="operator">,</span> dynamicTexture); glEnable(GL_TEXTURE_2D); glEnable(GL_MULTISAMPLE); glEnable(GL_CULL_FACE); glEnable(GL_BLEND); glBlendFunc(GL_SRC_ALPHA<span class="operator">,</span> GL_ONE_MINUS_SRC_ALPHA); <span class="comment">// draw background</span> glPushMatrix(); glScalef(<span class="number">1.7f</span><span class="operator">,</span> <span class="number">1.7f</span><span class="operator">,</span> <span class="number">1.7f</span>); glColor4f(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glCallList(tile_list); glPopMatrix(); <span class="keyword">const</span> <span class="type">int</span> w <span class="operator">=</span> logo<span class="operator">.</span>width(); <span class="keyword">const</span> <span class="type">int</span> h <span class="operator">=</span> logo<span class="operator">.</span>height(); glRotatef(rot_x<span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="number">0.0f</span><span class="operator">,</span> <span class="number">0.0f</span>); glRotatef(rot_y<span class="operator">,</span> <span class="number">0.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="number">0.0f</span>); glRotatef(rot_z<span class="operator">,</span> <span class="number">0.0f</span><span class="operator">,</span> <span class="number">0.0f</span><span class="operator">,</span> <span class="number">1.0f</span>); glScalef(scale<span class="operator">/</span>w<span class="operator">,</span> scale<span class="operator">/</span>w<span class="operator">,</span> scale<span class="operator">/</span>w); glDepthFunc(GL_LESS); glEnable(GL_DEPTH_TEST); <span class="comment">// draw the Qt icon</span> glTranslatef(<span class="operator">-</span>w<span class="operator">+</span><span class="number">1</span><span class="operator">,</span> <span class="operator">-</span>h<span class="operator">+</span><span class="number">1</span><span class="operator">,</span> <span class="number">0.0f</span>); <span class="keyword">for</span> (<span class="type">int</span> y<span class="operator">=</span>h<span class="operator">-</span><span class="number">1</span>; y<span class="operator">></span><span class="operator">=</span><span class="number">0</span>; <span class="operator">-</span><span class="operator">-</span>y) { <span class="type"><a href="qtglobal.html#uint-typedef">uint</a></span> <span class="operator">*</span>p <span class="operator">=</span> (<span class="type"><a href="qtglobal.html#uint-typedef">uint</a></span><span class="operator">*</span>) logo<span class="operator">.</span>scanLine(y); <span class="type"><a href="qtglobal.html#uint-typedef">uint</a></span> <span class="operator">*</span>end <span class="operator">=</span> p <span class="operator">+</span> w; <span class="type">int</span> x <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">while</span> (p <span class="operator"><</span> end) { glColor4ub(<a href="qcolor.html#qRed">qRed</a>(<span class="operator">*</span>p)<span class="operator">,</span> <a href="qcolor.html#qGreen">qGreen</a>(<span class="operator">*</span>p)<span class="operator">,</span> <a href="qcolor.html#qBlue">qBlue</a>(<span class="operator">*</span>p)<span class="operator">,</span> <span class="type"><a href="qtglobal.html#uchar-typedef">uchar</a></span>(<a href="qcolor.html#qAlpha">qAlpha</a>(<span class="operator">*</span>p)<span class="operator">*</span><span class="operator">.</span><span class="number">9</span>)); glTranslatef(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">0.0f</span><span class="operator">,</span> wave<span class="operator">[</span>y<span class="operator">*</span>w<span class="operator">+</span>x<span class="operator">]</span>); <span class="keyword">if</span> (<a href="qcolor.html#qAlpha">qAlpha</a>(<span class="operator">*</span>p) <span class="operator">></span> <span class="number">128</span>) glCallList(tile_list); glTranslatef(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">0.0f</span><span class="operator">,</span> <span class="operator">-</span>wave<span class="operator">[</span>y<span class="operator">*</span>w<span class="operator">+</span>x<span class="operator">]</span>); glTranslatef(<span class="number">2.0f</span><span class="operator">,</span> <span class="number">0.0f</span><span class="operator">,</span> <span class="number">0.0f</span>); <span class="operator">+</span><span class="operator">+</span>x; <span class="operator">+</span><span class="operator">+</span>p; } glTranslatef(<span class="operator">-</span>w<span class="operator">*</span><span class="number">2.0f</span><span class="operator">,</span> <span class="number">2.0f</span><span class="operator">,</span> <span class="number">0.0f</span>); } <span class="comment">// restore the GL state that QPainter expects</span> restoreGLState(); p<span class="operator">.</span>endNativePainting(); <span class="comment">// draw the overlayed text using QPainter</span> p<span class="operator">.</span>setPen(<span class="type"><a href="qcolor.html">QColor</a></span>(<span class="number">197</span><span class="operator">,</span> <span class="number">197</span><span class="operator">,</span> <span class="number">197</span><span class="operator">,</span> <span class="number">157</span>)); p<span class="operator">.</span>setBrush(<span class="type"><a href="qcolor.html">QColor</a></span>(<span class="number">197</span><span class="operator">,</span> <span class="number">197</span><span class="operator">,</span> <span class="number">197</span><span class="operator">,</span> <span class="number">127</span>)); p<span class="operator">.</span>drawRect(<span class="type"><a href="qrect.html">QRect</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> width()<span class="operator">,</span> <span class="number">50</span>)); p<span class="operator">.</span>setPen(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>black); p<span class="operator">.</span>setBrush(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoBrush); <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> str1(tr(<span class="string">"A simple OpenGL pbuffer example."</span>)); <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> str2(tr(<span class="string">"Use the mouse wheel to zoom, press buttons and move mouse to rotate, double-click to flip."</span>)); <span class="type"><a href="qfontmetrics.html">QFontMetrics</a></span> fm(p<span class="operator">.</span>font()); p<span class="operator">.</span>drawText(width()<span class="operator">/</span><span class="number">2</span> <span class="operator">-</span> fm<span class="operator">.</span>width(str1)<span class="operator">/</span><span class="number">2</span><span class="operator">,</span> <span class="number">20</span><span class="operator">,</span> str1); p<span class="operator">.</span>drawText(width()<span class="operator">/</span><span class="number">2</span> <span class="operator">-</span> fm<span class="operator">.</span>width(str2)<span class="operator">/</span><span class="number">2</span><span class="operator">,</span> <span class="number">20</span> <span class="operator">+</span> fm<span class="operator">.</span>lineSpacing()<span class="operator">,</span> str2); } <span class="type">void</span> GLWidget<span class="operator">::</span>mousePressEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>e) { anchor <span class="operator">=</span> e<span class="operator">-</span><span class="operator">></span>pos(); } <span class="type">void</span> GLWidget<span class="operator">::</span>mouseMoveEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>e) { <span class="type"><a href="qpoint.html">QPoint</a></span> diff <span class="operator">=</span> e<span class="operator">-</span><span class="operator">></span>pos() <span class="operator">-</span> anchor; <span class="keyword">if</span> (e<span class="operator">-</span><span class="operator">></span>buttons() <span class="operator">&</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>LeftButton) { rot_x <span class="operator">+</span><span class="operator">=</span> diff<span class="operator">.</span>y()<span class="operator">/</span><span class="number">5.0f</span>; rot_y <span class="operator">+</span><span class="operator">=</span> diff<span class="operator">.</span>x()<span class="operator">/</span><span class="number">5.0f</span>; } <span class="keyword">else</span> <span class="keyword">if</span> (e<span class="operator">-</span><span class="operator">></span>buttons() <span class="operator">&</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>RightButton) { rot_z <span class="operator">+</span><span class="operator">=</span> diff<span class="operator">.</span>x()<span class="operator">/</span><span class="number">5.0f</span>; } anchor <span class="operator">=</span> e<span class="operator">-</span><span class="operator">></span>pos(); draw(); } <span class="type">void</span> GLWidget<span class="operator">::</span>wheelEvent(<span class="type"><a href="qwheelevent.html">QWheelEvent</a></span> <span class="operator">*</span>e) { e<span class="operator">-</span><span class="operator">></span>delta() <span class="operator">></span> <span class="number">0</span> <span class="operator">?</span> scale <span class="operator">+</span><span class="operator">=</span> scale<span class="operator">*</span><span class="number">0.1f</span> : scale <span class="operator">-</span><span class="operator">=</span> scale<span class="operator">*</span><span class="number">0.1f</span>; draw(); } <span class="type">void</span> GLWidget<span class="operator">::</span>mouseDoubleClickEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>) { anim<span class="operator">-</span><span class="operator">></span>start(); } <span class="type">void</span> GLWidget<span class="operator">::</span>animate(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> val) { rot_y <span class="operator">=</span> val <span class="operator">*</span> <span class="number">180</span>; draw(); } <span class="type">void</span> GLWidget<span class="operator">::</span>animFinished() { <span class="keyword">if</span> (anim<span class="operator">-</span><span class="operator">></span>direction() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qtimeline.html">QTimeLine</a></span><span class="operator">::</span>Forward) anim<span class="operator">-</span><span class="operator">></span>setDirection(<span class="type"><a href="qtimeline.html">QTimeLine</a></span><span class="operator">::</span>Backward); <span class="keyword">else</span> anim<span class="operator">-</span><span class="operator">></span>setDirection(<span class="type"><a href="qtimeline.html">QTimeLine</a></span><span class="operator">::</span>Forward); } <span class="type">void</span> GLWidget<span class="operator">::</span>saveGLState() { glPushAttrib(GL_ALL_ATTRIB_BITS); glMatrixMode(GL_PROJECTION); glPushMatrix(); glMatrixMode(GL_MODELVIEW); glPushMatrix(); } <span class="type">void</span> GLWidget<span class="operator">::</span>restoreGLState() { glMatrixMode(GL_PROJECTION); glPopMatrix(); glMatrixMode(GL_MODELVIEW); glPopMatrix(); glPopAttrib(); } <span class="preprocessor">#define PI 3.14159</span> <span class="type">void</span> GLWidget<span class="operator">::</span>timerEvent(<span class="type"><a href="qtimerevent.html">QTimerEvent</a></span> <span class="operator">*</span>) { <span class="keyword">if</span> (<span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>mouseButtons() <span class="operator">!</span><span class="operator">=</span> <span class="number">0</span>) <span class="keyword">return</span>; <span class="keyword">static</span> <span class="type">bool</span> scale_in <span class="operator">=</span> <span class="keyword">true</span>; <span class="keyword">if</span> (scale_in <span class="operator">&</span><span class="operator">&</span> scale <span class="operator">></span> <span class="number">35.0f</span>) scale_in <span class="operator">=</span> <span class="keyword">false</span>; <span class="keyword">else</span> <span class="keyword">if</span> (<span class="operator">!</span>scale_in <span class="operator">&</span><span class="operator">&</span> scale <span class="operator"><</span> <span class="operator">.</span><span class="number">5f</span>) scale_in <span class="operator">=</span> <span class="keyword">true</span>; scale <span class="operator">=</span> scale_in <span class="operator">?</span> scale <span class="operator">+</span> scale<span class="operator">*</span><span class="number">0.01f</span> : scale<span class="operator">-</span>scale<span class="operator">*</span><span class="number">0.01f</span>; rot_z <span class="operator">+</span><span class="operator">=</span> <span class="number">0.3f</span>; rot_x <span class="operator">+</span><span class="operator">=</span> <span class="number">0.1f</span>; <span class="type">int</span> dx<span class="operator">,</span> dy; <span class="comment">// disturbance point</span> <span class="type">float</span> s<span class="operator">,</span> v<span class="operator">,</span> W<span class="operator">,</span> t; <span class="type">int</span> i<span class="operator">,</span> j; <span class="keyword">static</span> <span class="type">float</span> wt<span class="operator">[</span><span class="number">128</span><span class="operator">]</span><span class="operator">[</span><span class="number">128</span><span class="operator">]</span>; <span class="keyword">const</span> <span class="type">int</span> width <span class="operator">=</span> logo<span class="operator">.</span>width(); <span class="keyword">const</span> <span class="type">int</span> AMP <span class="operator">=</span> <span class="number">5</span>; dx <span class="operator">=</span> dy <span class="operator">=</span> width <span class="operator">></span><span class="operator">></span> <span class="number">1</span>; W <span class="operator">=</span> <span class="operator">.</span><span class="number">3f</span>; v <span class="operator">=</span> <span class="operator">-</span><span class="number">4</span>; <span class="comment">// wave speed</span> <span class="keyword">for</span> (i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> width; <span class="operator">+</span><span class="operator">+</span>i) { <span class="keyword">for</span> ( j <span class="operator">=</span> <span class="number">0</span>; j <span class="operator"><</span> width; <span class="operator">+</span><span class="operator">+</span>j) { s <span class="operator">=</span> sqrt((<span class="type">double</span>) ((j <span class="operator">-</span> dx) <span class="operator">*</span> (j <span class="operator">-</span> dx) <span class="operator">+</span> (i <span class="operator">-</span> dy) <span class="operator">*</span> (i <span class="operator">-</span> dy))); wt<span class="operator">[</span>i<span class="operator">]</span><span class="operator">[</span>j<span class="operator">]</span> <span class="operator">+</span><span class="operator">=</span> <span class="number">0.1f</span>; t <span class="operator">=</span> s <span class="operator">/</span> v; <span class="keyword">if</span> (s <span class="operator">!</span><span class="operator">=</span> <span class="number">0</span>) wave<span class="operator">[</span>i<span class="operator">*</span>width <span class="operator">+</span> j<span class="operator">]</span> <span class="operator">=</span> AMP <span class="operator">*</span> sin(<span class="number">2</span> <span class="operator">*</span> PI <span class="operator">*</span> W <span class="operator">*</span> (wt<span class="operator">[</span>i<span class="operator">]</span><span class="operator">[</span>j<span class="operator">]</span> <span class="operator">+</span> t)) <span class="operator">/</span> (<span class="number">0.2</span><span class="operator">*</span>(s <span class="operator">+</span> <span class="number">2</span>)); <span class="keyword">else</span> wave<span class="operator">[</span>i<span class="operator">*</span>width <span class="operator">+</span> j<span class="operator">]</span> <span class="operator">=</span> AMP <span class="operator">*</span> sin(<span class="number">2</span> <span class="operator">*</span> PI <span class="operator">*</span> W <span class="operator">*</span> (wt<span class="operator">[</span>i<span class="operator">]</span><span class="operator">[</span>j<span class="operator">]</span> <span class="operator">+</span> t)); } } }</pre> </div> <!-- @@@opengl/pbuffers2/glwidget.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.</p> <br /> <p> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.</p> <p> Documentation sources may be obtained from <a href="http://www.qt-project.org"> www.qt-project.org</a>.</p> <br /> <p> Qt and respective logos are trademarks of The Qt Company Ltd in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. <a title="Privacy Policy" href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p> </div> <script src="scripts/functions.js" type="text/javascript"></script> </body> </html>