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<h1 class="title">cube.cpp Example File</h1>
<span class="small-subtitle">opengl/pbuffers/cube.cpp</span>
<!-- $$$opengl/pbuffers/cube.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 &quot;cube.h&quot;</span>
<span class="preprocessor">#include &quot;glwidget.h&quot;</span>
<span class="preprocessor">#include &lt;QtGui/QImage&gt;</span>
<span class="preprocessor">#include &lt;QtCore/QPropertyAnimation&gt;</span>
<span class="keyword">static</span> <span class="keyword">const</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> FACE_SIZE <span class="operator">=</span> <span class="number">0.4</span>;
<span class="keyword">static</span> <span class="keyword">const</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> speeds<span class="operator">[</span><span class="operator">]</span> <span class="operator">=</span> { <span class="number">3.8f</span><span class="operator">,</span> <span class="number">4.4f</span><span class="operator">,</span> <span class="number">5.6f</span> };
<span class="keyword">static</span> <span class="keyword">const</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> amplitudes<span class="operator">[</span><span class="operator">]</span> <span class="operator">=</span> { <span class="number">2.0f</span><span class="operator">,</span> <span class="number">2.5f</span><span class="operator">,</span> <span class="number">3.0f</span> };
<span class="keyword">static</span> <span class="keyword">inline</span> <span class="type">void</span> qSetColor(<span class="type">float</span> colorVec<span class="operator">[</span><span class="operator">]</span><span class="operator">,</span> <span class="type"><a href="qcolor.html">QColor</a></span> c)
{
colorVec<span class="operator">[</span><span class="number">0</span><span class="operator">]</span> <span class="operator">=</span> c<span class="operator">.</span>redF();
colorVec<span class="operator">[</span><span class="number">1</span><span class="operator">]</span> <span class="operator">=</span> c<span class="operator">.</span>greenF();
colorVec<span class="operator">[</span><span class="number">2</span><span class="operator">]</span> <span class="operator">=</span> c<span class="operator">.</span>blueF();
colorVec<span class="operator">[</span><span class="number">3</span><span class="operator">]</span> <span class="operator">=</span> c<span class="operator">.</span>alphaF();
}
<span class="type">int</span> Geometry<span class="operator">::</span>append(<span class="keyword">const</span> QVector3D <span class="operator">&amp;</span>a<span class="operator">,</span> <span class="keyword">const</span> QVector3D <span class="operator">&amp;</span>n<span class="operator">,</span> <span class="keyword">const</span> QVector2D <span class="operator">&amp;</span>t)
{
<span class="type">int</span> v <span class="operator">=</span> vertices<span class="operator">.</span>count();
vertices<span class="operator">.</span>append(a);
normals<span class="operator">.</span>append(n);
texCoords<span class="operator">.</span>append(t);
faces<span class="operator">.</span>append(v);
colors<span class="operator">.</span>append(QVector4D(<span class="number">0.6f</span><span class="operator">,</span> <span class="number">0.6f</span><span class="operator">,</span> <span class="number">0.6f</span><span class="operator">,</span> <span class="number">1.0f</span>));
<span class="keyword">return</span> v;
}
<span class="type">void</span> Geometry<span class="operator">::</span>addQuad(<span class="keyword">const</span> QVector3D <span class="operator">&amp;</span>a<span class="operator">,</span> <span class="keyword">const</span> QVector3D <span class="operator">&amp;</span>b<span class="operator">,</span>
<span class="keyword">const</span> QVector3D <span class="operator">&amp;</span>c<span class="operator">,</span> <span class="keyword">const</span> QVector3D <span class="operator">&amp;</span>d<span class="operator">,</span>
<span class="keyword">const</span> <span class="type"><a href="qvector.html">QVector</a></span><span class="operator">&lt;</span>QVector2D<span class="operator">&gt;</span> <span class="operator">&amp;</span>tex)
{
QVector3D norm <span class="operator">=</span> QVector3D<span class="operator">::</span>normal(a<span class="operator">,</span> b<span class="operator">,</span> c);
<span class="comment">// append first triangle</span>
<span class="type">int</span> aref <span class="operator">=</span> append(a<span class="operator">,</span> norm<span class="operator">,</span> tex<span class="operator">[</span><span class="number">0</span><span class="operator">]</span>);
append(b<span class="operator">,</span> norm<span class="operator">,</span> tex<span class="operator">[</span><span class="number">1</span><span class="operator">]</span>);
<span class="type">int</span> cref <span class="operator">=</span> append(c<span class="operator">,</span> norm<span class="operator">,</span> tex<span class="operator">[</span><span class="number">2</span><span class="operator">]</span>);
<span class="comment">// append second triangle</span>
faces<span class="operator">.</span>append(aref);
faces<span class="operator">.</span>append(cref);
append(d<span class="operator">,</span> norm<span class="operator">,</span> tex<span class="operator">[</span><span class="number">3</span><span class="operator">]</span>);
}
<span class="type">void</span> Geometry<span class="operator">::</span>loadArrays() <span class="keyword">const</span>
{
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
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());
glNormalPointer(GL_FLOAT<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> normals<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());
glColorPointer(<span class="number">4</span><span class="operator">,</span> GL_FLOAT<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> colors<span class="operator">.</span>constData());
}
<span class="type">void</span> Geometry<span class="operator">::</span>setColors(<span class="type">int</span> start<span class="operator">,</span> GLfloat colorArray<span class="operator">[</span><span class="number">4</span><span class="operator">]</span><span class="operator">[</span><span class="number">4</span><span class="operator">]</span>)
{
<span class="type">int</span> off <span class="operator">=</span> faces<span class="operator">[</span>start<span class="operator">]</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">4</span>; <span class="operator">+</span><span class="operator">+</span>i)
colors<span class="operator">[</span>i <span class="operator">+</span> off<span class="operator">]</span> <span class="operator">=</span> QVector4D(colorArray<span class="operator">[</span>i<span class="operator">]</span><span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">,</span>
colorArray<span class="operator">[</span>i<span class="operator">]</span><span class="operator">[</span><span class="number">1</span><span class="operator">]</span><span class="operator">,</span>
colorArray<span class="operator">[</span>i<span class="operator">]</span><span class="operator">[</span><span class="number">2</span><span class="operator">]</span><span class="operator">,</span>
colorArray<span class="operator">[</span>i<span class="operator">]</span><span class="operator">[</span><span class="number">3</span><span class="operator">]</span>);
}
Tile<span class="operator">::</span>Tile(<span class="keyword">const</span> QVector3D <span class="operator">&amp;</span>loc)
: location(loc)
<span class="operator">,</span> start(<span class="number">0</span>)
<span class="operator">,</span> count(<span class="number">0</span>)
<span class="operator">,</span> useFlatColor(<span class="keyword">false</span>)
<span class="operator">,</span> geom(<span class="number">0</span>)
{
qSetColor(faceColor<span class="operator">,</span> <span class="type"><a href="qcolor.html">QColor</a></span>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>darkGray));
}
<span class="type">void</span> Tile<span class="operator">::</span>setColors(GLfloat colorArray<span class="operator">[</span><span class="number">4</span><span class="operator">]</span><span class="operator">[</span><span class="number">4</span><span class="operator">]</span>)
{
useFlatColor <span class="operator">=</span> <span class="keyword">true</span>;
geom<span class="operator">-</span><span class="operator">&gt;</span>setColors(start<span class="operator">,</span> colorArray);
}
<span class="keyword">static</span> <span class="keyword">inline</span> <span class="type">void</span> qMultMatrix(<span class="keyword">const</span> QMatrix4x4 <span class="operator">&amp;</span>mat)
{
<span class="keyword">if</span> (<span class="keyword">sizeof</span>(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>) <span class="operator">=</span><span class="operator">=</span> <span class="keyword">sizeof</span>(GLfloat))
glMultMatrixf((GLfloat<span class="operator">*</span>)mat<span class="operator">.</span>constData());
<span class="preprocessor">#ifndef QT_OPENGL_ES</span>
<span class="keyword">else</span> <span class="keyword">if</span> (<span class="keyword">sizeof</span>(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>) <span class="operator">=</span><span class="operator">=</span> <span class="keyword">sizeof</span>(GLdouble))
glMultMatrixd((GLdouble<span class="operator">*</span>)mat<span class="operator">.</span>constData());
<span class="preprocessor">#endif</span>
<span class="keyword">else</span>
{
GLfloat fmat<span class="operator">[</span><span class="number">16</span><span class="operator">]</span>;
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <span class="keyword">const</span> <span class="operator">*</span>r <span class="operator">=</span> mat<span class="operator">.</span>constData();
<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">16</span>; <span class="operator">+</span><span class="operator">+</span>i)
fmat<span class="operator">[</span>i<span class="operator">]</span> <span class="operator">=</span> r<span class="operator">[</span>i<span class="operator">]</span>;
glMultMatrixf(fmat);
}
}
<span class="type">void</span> Tile<span class="operator">::</span>draw() <span class="keyword">const</span>
{
QMatrix4x4 mat;
mat<span class="operator">.</span>translate(location);
mat<span class="operator">.</span>rotate(orientation);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
qMultMatrix(mat);
glMaterialfv(GL_FRONT_AND_BACK<span class="operator">,</span> GL_AMBIENT_AND_DIFFUSE<span class="operator">,</span> faceColor);
glDrawElements(GL_TRIANGLES<span class="operator">,</span> count<span class="operator">,</span> GL_UNSIGNED_SHORT<span class="operator">,</span> geom<span class="operator">-</span><span class="operator">&gt;</span>indices() <span class="operator">+</span> start);
glPopMatrix();
}
TileBuilder<span class="operator">::</span>TileBuilder(Geometry <span class="operator">*</span>g<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> depth<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> size)
: verts(<span class="number">4</span>)
<span class="operator">,</span> tex(<span class="number">4</span>)
<span class="operator">,</span> start(g<span class="operator">-</span><span class="operator">&gt;</span>count())
<span class="operator">,</span> count(<span class="number">0</span>)
<span class="operator">,</span> geom(g)
{
<span class="comment">// front face - make a square with bottom-left at origin</span>
verts<span class="operator">[</span>br<span class="operator">]</span><span class="operator">.</span>setX(size);
verts<span class="operator">[</span>tr<span class="operator">]</span><span class="operator">.</span>setX(size);
verts<span class="operator">[</span>tr<span class="operator">]</span><span class="operator">.</span>setY(size);
verts<span class="operator">[</span>tl<span class="operator">]</span><span class="operator">.</span>setY(size);
<span class="comment">// these vert numbers are good for the tex-coords</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">4</span>; <span class="operator">+</span><span class="operator">+</span>i)
tex<span class="operator">[</span>i<span class="operator">]</span> <span class="operator">=</span> verts<span class="operator">[</span>i<span class="operator">]</span><span class="operator">.</span>toVector2D();
<span class="comment">// now move verts half cube width across so cube is centered on origin</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">4</span>; <span class="operator">+</span><span class="operator">+</span>i)
verts<span class="operator">[</span>i<span class="operator">]</span> <span class="operator">-</span><span class="operator">=</span> QVector3D(size <span class="operator">/</span> <span class="number">2.0f</span><span class="operator">,</span> size <span class="operator">/</span> <span class="number">2.0f</span><span class="operator">,</span> <span class="operator">-</span>depth);
<span class="comment">// add the front face</span>
g<span class="operator">-</span><span class="operator">&gt;</span>addQuad(verts<span class="operator">[</span>bl<span class="operator">]</span><span class="operator">,</span> verts<span class="operator">[</span>br<span class="operator">]</span><span class="operator">,</span> verts<span class="operator">[</span>tr<span class="operator">]</span><span class="operator">,</span> verts<span class="operator">[</span>tl<span class="operator">]</span><span class="operator">,</span> tex);
count <span class="operator">=</span> g<span class="operator">-</span><span class="operator">&gt;</span>count() <span class="operator">-</span> start;
}
<span class="type">void</span> TileBuilder<span class="operator">::</span>initialize(Tile <span class="operator">*</span>tile) <span class="keyword">const</span>
{
tile<span class="operator">-</span><span class="operator">&gt;</span>start <span class="operator">=</span> start;
tile<span class="operator">-</span><span class="operator">&gt;</span>count <span class="operator">=</span> count;
tile<span class="operator">-</span><span class="operator">&gt;</span>geom <span class="operator">=</span> geom;
qSetColor(tile<span class="operator">-</span><span class="operator">&gt;</span>faceColor<span class="operator">,</span> color);
}
Tile <span class="operator">*</span>TileBuilder<span class="operator">::</span>newTile(<span class="keyword">const</span> QVector3D <span class="operator">&amp;</span>loc) <span class="keyword">const</span>
{
Tile <span class="operator">*</span>tile <span class="operator">=</span> <span class="keyword">new</span> Tile(loc);
initialize(tile);
<span class="keyword">return</span> tile;
}
Cube<span class="operator">::</span>Cube(<span class="keyword">const</span> QVector3D <span class="operator">&amp;</span>loc)
: Tile(loc)
<span class="operator">,</span> rot(<span class="number">0.0f</span>)
<span class="operator">,</span> r(<span class="number">0</span>)
<span class="operator">,</span> animGroup(<span class="number">0</span>)
{
}
Cube<span class="operator">::</span><span class="operator">~</span>Cube()
{
}
<span class="type">void</span> Cube<span class="operator">::</span>setAltitude(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> a)
{
<span class="keyword">if</span> (location<span class="operator">.</span>y() <span class="operator">!</span><span class="operator">=</span> a)
{
location<span class="operator">.</span>setY(a);
<span class="keyword">emit</span> changed();
}
}
<span class="type">void</span> Cube<span class="operator">::</span>setRange(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> r)
{
<span class="keyword">if</span> (location<span class="operator">.</span>x() <span class="operator">!</span><span class="operator">=</span> r)
{
location<span class="operator">.</span>setX(r);
<span class="keyword">emit</span> changed();
}
}
<span class="type">void</span> Cube<span class="operator">::</span>setRotation(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> r)
{
<span class="keyword">if</span> (r <span class="operator">!</span><span class="operator">=</span> rot)
{
orientation <span class="operator">=</span> <span class="type"><a href="qquaternion.html">QQuaternion</a></span><span class="operator">::</span>fromAxisAndAngle(QVector3D(<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> r);
<span class="keyword">emit</span> changed();
}
}
<span class="type">void</span> Cube<span class="operator">::</span>removeBounce()
{
<span class="keyword">delete</span> animGroup;
animGroup <span class="operator">=</span> <span class="number">0</span>;
<span class="keyword">delete</span> r;
r <span class="operator">=</span> <span class="number">0</span>;
}
<span class="type">void</span> Cube<span class="operator">::</span>startAnimation()
{
<span class="keyword">if</span> (r)
{
r<span class="operator">-</span><span class="operator">&gt;</span>start();
r<span class="operator">-</span><span class="operator">&gt;</span>setCurrentTime(startx);
}
<span class="keyword">if</span> (animGroup)
animGroup<span class="operator">-</span><span class="operator">&gt;</span>start();
<span class="keyword">if</span> (rtn)
rtn<span class="operator">-</span><span class="operator">&gt;</span>start();
}
<span class="type">void</span> Cube<span class="operator">::</span>setAnimationPaused(<span class="type">bool</span> paused)
{
<span class="keyword">if</span> (paused)
{
<span class="keyword">if</span> (r)
r<span class="operator">-</span><span class="operator">&gt;</span>pause();
<span class="keyword">if</span> (animGroup)
animGroup<span class="operator">-</span><span class="operator">&gt;</span>pause();
<span class="keyword">if</span> (rtn)
rtn<span class="operator">-</span><span class="operator">&gt;</span>pause();
}
<span class="keyword">else</span>
{
<span class="keyword">if</span> (r)
r<span class="operator">-</span><span class="operator">&gt;</span>resume();
<span class="keyword">if</span> (animGroup)
animGroup<span class="operator">-</span><span class="operator">&gt;</span>resume();
<span class="keyword">if</span> (rtn)
rtn<span class="operator">-</span><span class="operator">&gt;</span>resume();
}
}
CubeBuilder<span class="operator">::</span>CubeBuilder(Geometry <span class="operator">*</span>g<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> depth<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> size)
: TileBuilder(g<span class="operator">,</span> depth)
<span class="operator">,</span> ix(<span class="number">0</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">4</span>; <span class="operator">+</span><span class="operator">+</span>i)
verts<span class="operator">[</span>i<span class="operator">]</span><span class="operator">.</span>setZ(size <span class="operator">/</span> <span class="number">2.0f</span>);
<span class="comment">// back face - &quot;extrude&quot; verts down</span>
<span class="type"><a href="qvector.html">QVector</a></span><span class="operator">&lt;</span>QVector3D<span class="operator">&gt;</span> back(verts);
<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">4</span>; <span class="operator">+</span><span class="operator">+</span>i)
back<span class="operator">[</span>i<span class="operator">]</span><span class="operator">.</span>setZ(<span class="operator">-</span>size <span class="operator">/</span> <span class="number">2.0f</span>);
<span class="comment">// add the back face</span>
g<span class="operator">-</span><span class="operator">&gt;</span>addQuad(back<span class="operator">[</span>br<span class="operator">]</span><span class="operator">,</span> back<span class="operator">[</span>bl<span class="operator">]</span><span class="operator">,</span> back<span class="operator">[</span>tl<span class="operator">]</span><span class="operator">,</span> back<span class="operator">[</span>tr<span class="operator">]</span><span class="operator">,</span> tex);
<span class="comment">// add the sides</span>
g<span class="operator">-</span><span class="operator">&gt;</span>addQuad(back<span class="operator">[</span>bl<span class="operator">]</span><span class="operator">,</span> back<span class="operator">[</span>br<span class="operator">]</span><span class="operator">,</span> verts<span class="operator">[</span>br<span class="operator">]</span><span class="operator">,</span> verts<span class="operator">[</span>bl<span class="operator">]</span><span class="operator">,</span> tex);
g<span class="operator">-</span><span class="operator">&gt;</span>addQuad(back<span class="operator">[</span>br<span class="operator">]</span><span class="operator">,</span> back<span class="operator">[</span>tr<span class="operator">]</span><span class="operator">,</span> verts<span class="operator">[</span>tr<span class="operator">]</span><span class="operator">,</span> verts<span class="operator">[</span>br<span class="operator">]</span><span class="operator">,</span> tex);
g<span class="operator">-</span><span class="operator">&gt;</span>addQuad(back<span class="operator">[</span>tr<span class="operator">]</span><span class="operator">,</span> back<span class="operator">[</span>tl<span class="operator">]</span><span class="operator">,</span> verts<span class="operator">[</span>tl<span class="operator">]</span><span class="operator">,</span> verts<span class="operator">[</span>tr<span class="operator">]</span><span class="operator">,</span> tex);
g<span class="operator">-</span><span class="operator">&gt;</span>addQuad(back<span class="operator">[</span>tl<span class="operator">]</span><span class="operator">,</span> back<span class="operator">[</span>bl<span class="operator">]</span><span class="operator">,</span> verts<span class="operator">[</span>bl<span class="operator">]</span><span class="operator">,</span> verts<span class="operator">[</span>tl<span class="operator">]</span><span class="operator">,</span> tex);
count <span class="operator">=</span> g<span class="operator">-</span><span class="operator">&gt;</span>count() <span class="operator">-</span> start;
}
Cube <span class="operator">*</span>CubeBuilder<span class="operator">::</span>newCube(<span class="keyword">const</span> QVector3D <span class="operator">&amp;</span>loc) <span class="keyword">const</span>
{
Cube <span class="operator">*</span>c <span class="operator">=</span> <span class="keyword">new</span> Cube(loc);
initialize(c);
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> d <span class="operator">=</span> <span class="number">4000.0f</span>;
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> d3 <span class="operator">=</span> d <span class="operator">/</span> <span class="number">3.0f</span>;
<span class="comment">// Animate movement from left to right</span>
c<span class="operator">-</span><span class="operator">&gt;</span>r <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(c<span class="operator">,</span> <span class="string">&quot;range&quot;</span>);
c<span class="operator">-</span><span class="operator">&gt;</span>r<span class="operator">-</span><span class="operator">&gt;</span>setStartValue(<span class="operator">-</span><span class="number">1.3f</span>);
c<span class="operator">-</span><span class="operator">&gt;</span>r<span class="operator">-</span><span class="operator">&gt;</span>setEndValue(<span class="number">1.3f</span>);
c<span class="operator">-</span><span class="operator">&gt;</span>startx <span class="operator">=</span> ix <span class="operator">*</span> d3 <span class="operator">*</span> <span class="number">3.0f</span>;
c<span class="operator">-</span><span class="operator">&gt;</span>r<span class="operator">-</span><span class="operator">&gt;</span>setDuration(d <span class="operator">*</span> <span class="number">4.0f</span>);
c<span class="operator">-</span><span class="operator">&gt;</span>r<span class="operator">-</span><span class="operator">&gt;</span>setLoopCount(<span class="operator">-</span><span class="number">1</span>);
c<span class="operator">-</span><span class="operator">&gt;</span>r<span class="operator">-</span><span class="operator">&gt;</span>setEasingCurve(<span class="type"><a href="qeasingcurve.html">QEasingCurve</a></span>(<span class="type"><a href="qeasingcurve.html">QEasingCurve</a></span><span class="operator">::</span>CosineCurve));
c<span class="operator">-</span><span class="operator">&gt;</span>animGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qsequentialanimationgroup.html">QSequentialAnimationGroup</a></span>(c);
<span class="comment">// Animate movement from bottom to top</span>
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>a_up <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(c<span class="operator">,</span> <span class="string">&quot;altitude&quot;</span><span class="operator">,</span> c<span class="operator">-</span><span class="operator">&gt;</span>animGroup);
a_up<span class="operator">-</span><span class="operator">&gt;</span>setEndValue(loc<span class="operator">.</span>y());
a_up<span class="operator">-</span><span class="operator">&gt;</span>setStartValue(loc<span class="operator">.</span>y() <span class="operator">+</span> amplitudes<span class="operator">[</span>ix<span class="operator">]</span>);
a_up<span class="operator">-</span><span class="operator">&gt;</span>setDuration(d <span class="operator">/</span> speeds<span class="operator">[</span>ix<span class="operator">]</span>);
a_up<span class="operator">-</span><span class="operator">&gt;</span>setLoopCount(<span class="number">1</span>);
a_up<span class="operator">-</span><span class="operator">&gt;</span>setEasingCurve(<span class="type"><a href="qeasingcurve.html">QEasingCurve</a></span>(<span class="type"><a href="qeasingcurve.html">QEasingCurve</a></span><span class="operator">::</span>InQuad));
<span class="comment">// Animate movement from top to bottom</span>
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>a_down <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(c<span class="operator">,</span> <span class="string">&quot;altitude&quot;</span><span class="operator">,</span> c<span class="operator">-</span><span class="operator">&gt;</span>animGroup);
a_down<span class="operator">-</span><span class="operator">&gt;</span>setEndValue(loc<span class="operator">.</span>y() <span class="operator">+</span> amplitudes<span class="operator">[</span>ix<span class="operator">]</span>);
a_down<span class="operator">-</span><span class="operator">&gt;</span>setStartValue(loc<span class="operator">.</span>y());
a_down<span class="operator">-</span><span class="operator">&gt;</span>setDuration(d <span class="operator">/</span> speeds<span class="operator">[</span>ix<span class="operator">]</span>);
a_down<span class="operator">-</span><span class="operator">&gt;</span>setLoopCount(<span class="number">1</span>);
a_down<span class="operator">-</span><span class="operator">&gt;</span>setEasingCurve(<span class="type"><a href="qeasingcurve.html">QEasingCurve</a></span>(<span class="type"><a href="qeasingcurve.html">QEasingCurve</a></span><span class="operator">::</span>OutQuad));
c<span class="operator">-</span><span class="operator">&gt;</span>animGroup<span class="operator">-</span><span class="operator">&gt;</span>addAnimation(a_up);
c<span class="operator">-</span><span class="operator">&gt;</span>animGroup<span class="operator">-</span><span class="operator">&gt;</span>addAnimation(a_down);
c<span class="operator">-</span><span class="operator">&gt;</span>animGroup<span class="operator">-</span><span class="operator">&gt;</span>setLoopCount(<span class="operator">-</span><span class="number">1</span>);
<span class="comment">// Animate rotation</span>
c<span class="operator">-</span><span class="operator">&gt;</span>rtn <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(c<span class="operator">,</span> <span class="string">&quot;rotation&quot;</span>);
c<span class="operator">-</span><span class="operator">&gt;</span>rtn<span class="operator">-</span><span class="operator">&gt;</span>setStartValue(c<span class="operator">-</span><span class="operator">&gt;</span>rot);
c<span class="operator">-</span><span class="operator">&gt;</span>rtn<span class="operator">-</span><span class="operator">&gt;</span>setEndValue(<span class="number">359.0f</span>);
c<span class="operator">-</span><span class="operator">&gt;</span>rtn<span class="operator">-</span><span class="operator">&gt;</span>setDuration(d <span class="operator">*</span> <span class="number">2.0f</span>);
c<span class="operator">-</span><span class="operator">&gt;</span>rtn<span class="operator">-</span><span class="operator">&gt;</span>setLoopCount(<span class="operator">-</span><span class="number">1</span>);
c<span class="operator">-</span><span class="operator">&gt;</span>rtn<span class="operator">-</span><span class="operator">&gt;</span>setDuration(d <span class="operator">/</span> <span class="number">2</span>);
ix <span class="operator">=</span> (ix <span class="operator">+</span> <span class="number">1</span>) <span class="operator">%</span> <span class="number">3</span>;
<span class="keyword">return</span> c;
}</pre>
</div>
<!-- @@@opengl/pbuffers/cube.cpp -->
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