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<h1 class="title">glwidget.cpp Example File</h1>
<span class="subtitle">textures/glwidget.cpp</span>
<!-- $$$textures/glwidget.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">

  <span class="comment">/****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the examples of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** BSD License Usage
  ** Alternatively, 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 &quot;glwidget.h&quot;</span>
  <span class="preprocessor">#include &lt;QOpenGLShaderProgram&gt;</span>
  <span class="preprocessor">#include &lt;QOpenGLTexture&gt;</span>
  <span class="preprocessor">#include &lt;QMouseEvent&gt;</span>

  GLWidget<span class="operator">::</span>GLWidget(<span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
      : <span class="type"><a href="../qtwidgets/qopenglwidget.html">QOpenGLWidget</a></span>(parent)<span class="operator">,</span>
        clearColor(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>black)<span class="operator">,</span>
        xRot(<span class="number">0</span>)<span class="operator">,</span>
        yRot(<span class="number">0</span>)<span class="operator">,</span>
        zRot(<span class="number">0</span>)<span class="operator">,</span>
        program(<span class="number">0</span>)
  {
      memset(textures<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="keyword">sizeof</span>(textures));
  }

  GLWidget<span class="operator">::</span><span class="operator">~</span>GLWidget()
  {
      makeCurrent();
      vbo<span class="operator">.</span>destroy();
      <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">delete</span> textures<span class="operator">[</span>i<span class="operator">]</span>;
      <span class="keyword">delete</span> program;
      doneCurrent();
  }

  <span class="type"><a href="../qtcore/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="../qtcore/qsize.html">QSize</a></span>(<span class="number">50</span><span class="operator">,</span> <span class="number">50</span>);
  }

  <span class="type"><a href="../qtcore/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="../qtcore/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;
      update();
  }

  <span class="type">void</span> GLWidget<span class="operator">::</span>setClearColor(<span class="keyword">const</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> <span class="operator">&amp;</span>color)
  {
      clearColor <span class="operator">=</span> color;
      update();
  }

  <span class="type">void</span> GLWidget<span class="operator">::</span>initializeGL()
  {
      initializeOpenGLFunctions();

      makeObject();

      glEnable(GL_DEPTH_TEST);
      glEnable(GL_CULL_FACE);

  <span class="preprocessor">#define PROGRAM_VERTEX_ATTRIBUTE 0</span>
  <span class="preprocessor">#define PROGRAM_TEXCOORD_ATTRIBUTE 1</span>

      <span class="type"><a href="../qtgui/qopenglshader.html">QOpenGLShader</a></span> <span class="operator">*</span>vshader <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtgui/qopenglshader.html">QOpenGLShader</a></span>(<span class="type"><a href="../qtgui/qopenglshader.html">QOpenGLShader</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="../qtgui/qopenglshader.html">QOpenGLShader</a></span> <span class="operator">*</span>fshader <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtgui/qopenglshader.html">QOpenGLShader</a></span>(<span class="type"><a href="../qtgui/qopenglshader.html">QOpenGLShader</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="../qtgui/qopenglshaderprogram.html">QOpenGLShaderProgram</a></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="type">void</span> GLWidget<span class="operator">::</span>paintGL()
  {
      glClearColor(clearColor<span class="operator">.</span>redF()<span class="operator">,</span> clearColor<span class="operator">.</span>greenF()<span class="operator">,</span> clearColor<span class="operator">.</span>blueF()<span class="operator">,</span> clearColor<span class="operator">.</span>alphaF());
      glClear(GL_COLOR_BUFFER_BIT <span class="operator">|</span> GL_DEPTH_BUFFER_BIT);

      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>setAttributeBuffer(PROGRAM_VERTEX_ATTRIBUTE<span class="operator">,</span> GL_FLOAT<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">3</span><span class="operator">,</span> <span class="number">5</span> <span class="operator">*</span> <span class="keyword">sizeof</span>(GLfloat));
      program<span class="operator">-</span><span class="operator">&gt;</span>setAttributeBuffer(PROGRAM_TEXCOORD_ATTRIBUTE<span class="operator">,</span> GL_FLOAT<span class="operator">,</span> <span class="number">3</span> <span class="operator">*</span> <span class="keyword">sizeof</span>(GLfloat)<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">5</span> <span class="operator">*</span> <span class="keyword">sizeof</span>(GLfloat));

      <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) {
          textures<span class="operator">[</span>i<span class="operator">]</span><span class="operator">-</span><span class="operator">&gt;</span>bind();
          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="../qtcore/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="type">void</span> GLWidget<span class="operator">::</span>mousePressEvent(<span class="type"><a href="../qtgui/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="../qtgui/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="../qtcore/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="../qtcore/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="../qtgui/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> <span class="keyword">new</span> <span class="type"><a href="../qtgui/qopengltexture.html">QOpenGLTexture</a></span>(<span class="type"><a href="../qtgui/qimage.html">QImage</a></span>(<span class="type"><a href="../qtcore/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>mirrored());

      <span class="type"><a href="../qtcore/qvector.html">QVector</a></span><span class="operator">&lt;</span>GLfloat<span class="operator">&gt;</span> vertData;
      <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) {
              <span class="comment">// vertex position</span>
              vertData<span class="operator">.</span>append(<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>);
              vertData<span class="operator">.</span>append(<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>);
              vertData<span class="operator">.</span>append(<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>);
              <span class="comment">// texture coordinate</span>
              vertData<span class="operator">.</span>append(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>);
              vertData<span class="operator">.</span>append(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>);
          }
      }

      vbo<span class="operator">.</span>create();
      vbo<span class="operator">.</span>bind();
      vbo<span class="operator">.</span>allocate(vertData<span class="operator">.</span>constData()<span class="operator">,</span> vertData<span class="operator">.</span>count() <span class="operator">*</span> <span class="keyword">sizeof</span>(GLfloat));
  }

</pre>
</div>
<!-- @@@textures/glwidget.cpp -->
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   Documentation contributions included herein are the copyrights of
   their respective owners.<br>    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.<br>    Qt and respective logos are trademarks of The Qt Company Ltd.     in Finland and/or other countries worldwide. All other trademarks are property
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