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<h1 class="title">glwidget.cpp Example File</h1>
<span class="small-subtitle">opengl/textures/glwidget.cpp</span>
<!-- $$$opengl/textures/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:
**
** &quot;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
** &quot;AS IS&quot; 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.&quot;
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include &lt;QtGui&gt;</span>
<span class="preprocessor">#include &lt;QtOpenGL&gt;</span>
<span class="preprocessor">#include &quot;glwidget.h&quot;</span>
GLWidget<span class="operator">::</span>GLWidget(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent<span class="operator">,</span> <span class="type"><a href="qglwidget.html">QGLWidget</a></span> <span class="operator">*</span>shareWidget)
: <span class="type"><a href="qglwidget.html">QGLWidget</a></span>(parent<span class="operator">,</span> shareWidget)
{
clearColor <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>black;
xRot <span class="operator">=</span> <span class="number">0</span>;
yRot <span class="operator">=</span> <span class="number">0</span>;
zRot <span class="operator">=</span> <span class="number">0</span>;
<span class="preprocessor">#ifdef QT_OPENGL_ES_2</span>
program <span class="operator">=</span> <span class="number">0</span>;
<span class="preprocessor">#endif</span>
}
GLWidget<span class="operator">::</span><span class="operator">~</span>GLWidget()
{
}
<span class="type"><a href="qsize.html">QSize</a></span> GLWidget<span class="operator">::</span>minimumSizeHint() <span class="keyword">const</span>
{
<span class="keyword">return</span> <span class="type"><a href="qsize.html">QSize</a></span>(<span class="number">50</span><span class="operator">,</span> <span class="number">50</span>);
}
<span class="type"><a href="qsize.html">QSize</a></span> GLWidget<span class="operator">::</span>sizeHint() <span class="keyword">const</span>
{
<span class="keyword">return</span> <span class="type"><a href="qsize.html">QSize</a></span>(<span class="number">200</span><span class="operator">,</span> <span class="number">200</span>);
}
<span class="type">void</span> GLWidget<span class="operator">::</span>rotateBy(<span class="type">int</span> xAngle<span class="operator">,</span> <span class="type">int</span> yAngle<span class="operator">,</span> <span class="type">int</span> zAngle)
{
xRot <span class="operator">+</span><span class="operator">=</span> xAngle;
yRot <span class="operator">+</span><span class="operator">=</span> yAngle;
zRot <span class="operator">+</span><span class="operator">=</span> zAngle;
updateGL();
}
<span class="type">void</span> GLWidget<span class="operator">::</span>setClearColor(<span class="keyword">const</span> <span class="type"><a href="qcolor.html">QColor</a></span> <span class="operator">&amp;</span>color)
{
clearColor <span class="operator">=</span> color;
updateGL();
}
<span class="type">void</span> GLWidget<span class="operator">::</span>initializeGL()
{
makeObject();
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
<span class="preprocessor">#ifndef QT_OPENGL_ES_2</span>
glEnable(GL_TEXTURE_2D);
<span class="preprocessor">#endif</span>
<span class="preprocessor">#ifdef QT_OPENGL_ES_2</span>
<span class="preprocessor">#define PROGRAM_VERTEX_ATTRIBUTE 0</span>
<span class="preprocessor">#define PROGRAM_TEXCOORD_ATTRIBUTE 1</span>
<span class="type"><a href="qglshader.html">QGLShader</a></span> <span class="operator">*</span>vshader <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qglshader.html">QGLShader</a></span>(<span class="type"><a href="qglshader.html">QGLShader</a></span><span class="operator">::</span>Vertex<span class="operator">,</span> <span class="keyword">this</span>);
<span class="keyword">const</span> <span class="type">char</span> <span class="operator">*</span>vsrc <span class="operator">=</span>
<span class="string">&quot;attribute highp vec4 vertex;\n&quot;</span>
<span class="string">&quot;attribute mediump vec4 texCoord;\n&quot;</span>
<span class="string">&quot;varying mediump vec4 texc;\n&quot;</span>
<span class="string">&quot;uniform mediump mat4 matrix;\n&quot;</span>
<span class="string">&quot;void main(void)\n&quot;</span>
<span class="string">&quot;{\n&quot;</span>
<span class="string">&quot; gl_Position = matrix * vertex;\n&quot;</span>
<span class="string">&quot; texc = texCoord;\n&quot;</span>
<span class="string">&quot;}\n&quot;</span>;
vshader<span class="operator">-</span><span class="operator">&gt;</span>compileSourceCode(vsrc);
<span class="type"><a href="qglshader.html">QGLShader</a></span> <span class="operator">*</span>fshader <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qglshader.html">QGLShader</a></span>(<span class="type"><a href="qglshader.html">QGLShader</a></span><span class="operator">::</span>Fragment<span class="operator">,</span> <span class="keyword">this</span>);
<span class="keyword">const</span> <span class="type">char</span> <span class="operator">*</span>fsrc <span class="operator">=</span>
<span class="string">&quot;uniform sampler2D texture;\n&quot;</span>
<span class="string">&quot;varying mediump vec4 texc;\n&quot;</span>
<span class="string">&quot;void main(void)\n&quot;</span>
<span class="string">&quot;{\n&quot;</span>
<span class="string">&quot; gl_FragColor = texture2D(texture, texc.st);\n&quot;</span>
<span class="string">&quot;}\n&quot;</span>;
fshader<span class="operator">-</span><span class="operator">&gt;</span>compileSourceCode(fsrc);
program <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qglshaderprogram.html">QGLShaderProgram</a></span>(<span class="keyword">this</span>);
program<span class="operator">-</span><span class="operator">&gt;</span>addShader(vshader);
program<span class="operator">-</span><span class="operator">&gt;</span>addShader(fshader);
program<span class="operator">-</span><span class="operator">&gt;</span>bindAttributeLocation(<span class="string">&quot;vertex&quot;</span><span class="operator">,</span> PROGRAM_VERTEX_ATTRIBUTE);
program<span class="operator">-</span><span class="operator">&gt;</span>bindAttributeLocation(<span class="string">&quot;texCoord&quot;</span><span class="operator">,</span> PROGRAM_TEXCOORD_ATTRIBUTE);
program<span class="operator">-</span><span class="operator">&gt;</span>link();
program<span class="operator">-</span><span class="operator">&gt;</span>bind();
program<span class="operator">-</span><span class="operator">&gt;</span>setUniformValue(<span class="string">&quot;texture&quot;</span><span class="operator">,</span> <span class="number">0</span>);
<span class="preprocessor">#endif</span>
}
<span class="type">void</span> GLWidget<span class="operator">::</span>paintGL()
{
qglClearColor(clearColor);
glClear(GL_COLOR_BUFFER_BIT <span class="operator">|</span> GL_DEPTH_BUFFER_BIT);
<span class="preprocessor">#if !defined(QT_OPENGL_ES_2)</span>
glLoadIdentity();
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">10.0f</span>);
glRotatef(xRot <span class="operator">/</span> <span class="number">16.0f</span><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(yRot <span class="operator">/</span> <span class="number">16.0f</span><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(zRot <span class="operator">/</span> <span class="number">16.0f</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="number">1.0f</span>);
glVertexPointer(<span class="number">3</span><span class="operator">,</span> GL_FLOAT<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> vertices<span class="operator">.</span>constData());
glTexCoordPointer(<span class="number">2</span><span class="operator">,</span> GL_FLOAT<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> texCoords<span class="operator">.</span>constData());
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
<span class="preprocessor">#else</span>
QMatrix4x4 m;
m<span class="operator">.</span>ortho(<span class="operator">-</span><span class="number">0.5f</span><span class="operator">,</span> <span class="operator">+</span><span class="number">0.5f</span><span class="operator">,</span> <span class="operator">+</span><span class="number">0.5f</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.5f</span><span class="operator">,</span> <span class="number">4.0f</span><span class="operator">,</span> <span class="number">15.0f</span>);
m<span class="operator">.</span>translate(<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">10.0f</span>);
m<span class="operator">.</span>rotate(xRot <span class="operator">/</span> <span class="number">16.0f</span><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>);
m<span class="operator">.</span>rotate(yRot <span class="operator">/</span> <span class="number">16.0f</span><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>);
m<span class="operator">.</span>rotate(zRot <span class="operator">/</span> <span class="number">16.0f</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="number">1.0f</span>);
program<span class="operator">-</span><span class="operator">&gt;</span>setUniformValue(<span class="string">&quot;matrix&quot;</span><span class="operator">,</span> m);
program<span class="operator">-</span><span class="operator">&gt;</span>enableAttributeArray(PROGRAM_VERTEX_ATTRIBUTE);
program<span class="operator">-</span><span class="operator">&gt;</span>enableAttributeArray(PROGRAM_TEXCOORD_ATTRIBUTE);
program<span class="operator">-</span><span class="operator">&gt;</span>setAttributeArray
(PROGRAM_VERTEX_ATTRIBUTE<span class="operator">,</span> vertices<span class="operator">.</span>constData());
program<span class="operator">-</span><span class="operator">&gt;</span>setAttributeArray
(PROGRAM_TEXCOORD_ATTRIBUTE<span class="operator">,</span> texCoords<span class="operator">.</span>constData());
<span class="preprocessor">#endif</span>
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> <span class="number">6</span>; <span class="operator">+</span><span class="operator">+</span>i) {
glBindTexture(GL_TEXTURE_2D<span class="operator">,</span> textures<span class="operator">[</span>i<span class="operator">]</span>);
glDrawArrays(GL_TRIANGLE_FAN<span class="operator">,</span> i <span class="operator">*</span> <span class="number">4</span><span class="operator">,</span> <span class="number">4</span>);
}
}
<span class="type">void</span> GLWidget<span class="operator">::</span>resizeGL(<span class="type">int</span> width<span class="operator">,</span> <span class="type">int</span> height)
{
<span class="type">int</span> side <span class="operator">=</span> <a href="qtglobal.html#qMin">qMin</a>(width<span class="operator">,</span> height);
glViewport((width <span class="operator">-</span> side) <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> (height <span class="operator">-</span> side) <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> side<span class="operator">,</span> side);
<span class="preprocessor">#if !defined(QT_OPENGL_ES_2)</span>
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
<span class="preprocessor">#ifndef QT_OPENGL_ES</span>
glOrtho(<span class="operator">-</span><span class="number">0.5</span><span class="operator">,</span> <span class="operator">+</span><span class="number">0.5</span><span class="operator">,</span> <span class="operator">+</span><span class="number">0.5</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.5</span><span class="operator">,</span> <span class="number">4.0</span><span class="operator">,</span> <span class="number">15.0</span>);
<span class="preprocessor">#else</span>
glOrthof(<span class="operator">-</span><span class="number">0.5</span><span class="operator">,</span> <span class="operator">+</span><span class="number">0.5</span><span class="operator">,</span> <span class="operator">+</span><span class="number">0.5</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.5</span><span class="operator">,</span> <span class="number">4.0</span><span class="operator">,</span> <span class="number">15.0</span>);
<span class="preprocessor">#endif</span>
glMatrixMode(GL_MODELVIEW);
<span class="preprocessor">#endif</span>
}
<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>event)
{
lastPos <span class="operator">=</span> event<span class="operator">-</span><span class="operator">&gt;</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>event)
{
<span class="type">int</span> dx <span class="operator">=</span> event<span class="operator">-</span><span class="operator">&gt;</span>x() <span class="operator">-</span> lastPos<span class="operator">.</span>x();
<span class="type">int</span> dy <span class="operator">=</span> event<span class="operator">-</span><span class="operator">&gt;</span>y() <span class="operator">-</span> lastPos<span class="operator">.</span>y();
<span class="keyword">if</span> (event<span class="operator">-</span><span class="operator">&gt;</span>buttons() <span class="operator">&amp;</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>LeftButton) {
rotateBy(<span class="number">8</span> <span class="operator">*</span> dy<span class="operator">,</span> <span class="number">8</span> <span class="operator">*</span> dx<span class="operator">,</span> <span class="number">0</span>);
} <span class="keyword">else</span> <span class="keyword">if</span> (event<span class="operator">-</span><span class="operator">&gt;</span>buttons() <span class="operator">&amp;</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>RightButton) {
rotateBy(<span class="number">8</span> <span class="operator">*</span> dy<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">8</span> <span class="operator">*</span> dx);
}
lastPos <span class="operator">=</span> event<span class="operator">-</span><span class="operator">&gt;</span>pos();
}
<span class="type">void</span> GLWidget<span class="operator">::</span>mouseReleaseEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span> <span class="comment">/* event */</span>)
{
<span class="keyword">emit</span> clicked();
}
<span class="type">void</span> GLWidget<span class="operator">::</span>makeObject()
{
<span class="keyword">static</span> <span class="keyword">const</span> <span class="type">int</span> coords<span class="operator">[</span><span class="number">6</span><span class="operator">]</span><span class="operator">[</span><span class="number">4</span><span class="operator">]</span><span class="operator">[</span><span class="number">3</span><span class="operator">]</span> <span class="operator">=</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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="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="operator">+</span><span class="number">1</span><span class="operator">,</span> <span class="operator">+</span><span class="number">1</span> } }
};
<span class="keyword">for</span> (<span class="type">int</span> j<span class="operator">=</span><span class="number">0</span>; j <span class="operator">&lt;</span> <span class="number">6</span>; <span class="operator">+</span><span class="operator">+</span>j) {
textures<span class="operator">[</span>j<span class="operator">]</span> <span class="operator">=</span> bindTexture
(<span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="type"><a href="qstring.html">QString</a></span>(<span class="string">&quot;:/images/side%1.png&quot;</span>)<span class="operator">.</span>arg(j <span class="operator">+</span> <span class="number">1</span>))<span class="operator">,</span> GL_TEXTURE_2D);
}
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> <span class="number">6</span>; <span class="operator">+</span><span class="operator">+</span>i) {
<span class="keyword">for</span> (<span class="type">int</span> j <span class="operator">=</span> <span class="number">0</span>; j <span class="operator">&lt;</span> <span class="number">4</span>; <span class="operator">+</span><span class="operator">+</span>j) {
texCoords<span class="operator">.</span>append
(QVector2D(j <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span> <span class="operator">|</span><span class="operator">|</span> j <span class="operator">=</span><span class="operator">=</span> <span class="number">3</span><span class="operator">,</span> j <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span> <span class="operator">|</span><span class="operator">|</span> j <span class="operator">=</span><span class="operator">=</span> <span class="number">1</span>));
vertices<span class="operator">.</span>append
(QVector3D(<span class="number">0.2</span> <span class="operator">*</span> coords<span class="operator">[</span>i<span class="operator">]</span><span class="operator">[</span>j<span class="operator">]</span><span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">,</span> <span class="number">0.2</span> <span class="operator">*</span> coords<span class="operator">[</span>i<span class="operator">]</span><span class="operator">[</span>j<span class="operator">]</span><span class="operator">[</span><span class="number">1</span><span class="operator">]</span><span class="operator">,</span>
<span class="number">0.2</span> <span class="operator">*</span> coords<span class="operator">[</span>i<span class="operator">]</span><span class="operator">[</span>j<span class="operator">]</span><span class="operator">[</span><span class="number">2</span><span class="operator">]</span>));
}
}
}</pre>
</div>
<!-- @@@opengl/textures/glwidget.cpp -->
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