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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">roundedbox.cpp Example File</h1> <span class="small-subtitle">demos/boxes/roundedbox.cpp</span> <!-- $$$demos/boxes/roundedbox.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the demonstration applications of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** 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 Digia. For licensing terms and ** conditions see http://qt.digia.com/licensing. For further information ** use the contact form at http://qt.digia.com/contact-us. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 2.1 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Digia gives you certain additional ** rights. These rights are described in the Digia Qt LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 3.0 as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU General Public License version 3.0 requirements will be ** met: http://www.gnu.org/copyleft/gpl.html. ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "roundedbox.h"</span> <span class="comment">//============================================================================//</span> <span class="comment">// P3T2N3Vertex //</span> <span class="comment">//============================================================================//</span> VertexDescription P3T2N3Vertex<span class="operator">::</span>description<span class="operator">[</span><span class="operator">]</span> <span class="operator">=</span> { {VertexDescription<span class="operator">::</span>Position<span class="operator">,</span> GL_FLOAT<span class="operator">,</span> SIZE_OF_MEMBER(P3T2N3Vertex<span class="operator">,</span> position) <span class="operator">/</span> <span class="keyword">sizeof</span>(<span class="type">float</span>)<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>}<span class="operator">,</span> {VertexDescription<span class="operator">::</span>TexCoord<span class="operator">,</span> GL_FLOAT<span class="operator">,</span> SIZE_OF_MEMBER(P3T2N3Vertex<span class="operator">,</span> texCoord) <span class="operator">/</span> <span class="keyword">sizeof</span>(<span class="type">float</span>)<span class="operator">,</span> <span class="keyword">sizeof</span>(QVector3D)<span class="operator">,</span> <span class="number">0</span>}<span class="operator">,</span> {VertexDescription<span class="operator">::</span>Normal<span class="operator">,</span> GL_FLOAT<span class="operator">,</span> SIZE_OF_MEMBER(P3T2N3Vertex<span class="operator">,</span> normal) <span class="operator">/</span> <span class="keyword">sizeof</span>(<span class="type">float</span>)<span class="operator">,</span> <span class="keyword">sizeof</span>(QVector3D) <span class="operator">+</span> <span class="keyword">sizeof</span>(QVector2D)<span class="operator">,</span> <span class="number">0</span>}<span class="operator">,</span> {VertexDescription<span class="operator">::</span>Null<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>}<span class="operator">,</span> }; <span class="comment">//============================================================================//</span> <span class="comment">// GLRoundedBox //</span> <span class="comment">//============================================================================//</span> <span class="type">float</span> lerp(<span class="type">float</span> a<span class="operator">,</span> <span class="type">float</span> b<span class="operator">,</span> <span class="type">float</span> t) { <span class="keyword">return</span> a <span class="operator">*</span> (<span class="number">1.0f</span> <span class="operator">-</span> t) <span class="operator">+</span> b <span class="operator">*</span> t; } GLRoundedBox<span class="operator">::</span>GLRoundedBox(<span class="type">float</span> r<span class="operator">,</span> <span class="type">float</span> scale<span class="operator">,</span> <span class="type">int</span> n) : GLTriangleMesh<span class="operator"><</span>P3T2N3Vertex<span class="operator">,</span> <span class="type">unsigned</span> <span class="type">short</span><span class="operator">></span>((n<span class="operator">+</span><span class="number">2</span>)<span class="operator">*</span>(n<span class="operator">+</span><span class="number">3</span>)<span class="operator">*</span><span class="number">4</span><span class="operator">,</span> (n<span class="operator">+</span><span class="number">1</span>)<span class="operator">*</span>(n<span class="operator">+</span><span class="number">1</span>)<span class="operator">*</span><span class="number">24</span><span class="operator">+</span><span class="number">36</span><span class="operator">+</span><span class="number">72</span><span class="operator">*</span>(n<span class="operator">+</span><span class="number">1</span>)) { <span class="type">int</span> vidx <span class="operator">=</span> <span class="number">0</span><span class="operator">,</span> iidx <span class="operator">=</span> <span class="number">0</span>; <span class="type">int</span> vertexCountPerCorner <span class="operator">=</span> (n <span class="operator">+</span> <span class="number">2</span>) <span class="operator">*</span> (n <span class="operator">+</span> <span class="number">3</span>) <span class="operator">/</span> <span class="number">2</span>; P3T2N3Vertex <span class="operator">*</span>vp <span class="operator">=</span> m_vb<span class="operator">.</span>lock(); <span class="type">unsigned</span> <span class="type">short</span> <span class="operator">*</span>ip <span class="operator">=</span> m_ib<span class="operator">.</span>lock(); <span class="keyword">if</span> (<span class="operator">!</span>vp <span class="operator">|</span><span class="operator">|</span> <span class="operator">!</span>ip) { <a href="qtglobal.html#qWarning">qWarning</a>(<span class="string">"GLRoundedBox::GLRoundedBox: Failed to lock vertex buffer and/or index buffer."</span>); m_ib<span class="operator">.</span>unlock(); m_vb<span class="operator">.</span>unlock(); <span class="keyword">return</span>; } <span class="keyword">for</span> (<span class="type">int</span> corner <span class="operator">=</span> <span class="number">0</span>; corner <span class="operator"><</span> <span class="number">8</span>; <span class="operator">+</span><span class="operator">+</span>corner) { QVector3D centre(corner <span class="operator">&</span> <span class="number">1</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> corner <span class="operator">&</span> <span class="number">2</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> corner <span class="operator">&</span> <span class="number">4</span> <span class="operator">?</span> <span class="number">1.0f</span> : <span class="operator">-</span><span class="number">1.0f</span>); <span class="type">int</span> winding <span class="operator">=</span> (corner <span class="operator">&</span> <span class="number">1</span>) <span class="operator">^</span> ((corner <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> (corner <span class="operator">></span><span class="operator">></span> <span class="number">2</span>); <span class="type">int</span> offsX <span class="operator">=</span> ((corner <span class="operator">^</span> <span class="number">1</span>) <span class="operator">-</span> corner) <span class="operator">*</span> vertexCountPerCorner; <span class="type">int</span> offsY <span class="operator">=</span> ((corner <span class="operator">^</span> <span class="number">2</span>) <span class="operator">-</span> corner) <span class="operator">*</span> vertexCountPerCorner; <span class="type">int</span> offsZ <span class="operator">=</span> ((corner <span class="operator">^</span> <span class="number">4</span>) <span class="operator">-</span> corner) <span class="operator">*</span> vertexCountPerCorner; <span class="comment">// Face polygons</span> <span class="keyword">if</span> (winding) { ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> offsX; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> offsY; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> vertexCountPerCorner <span class="operator">-</span> n <span class="operator">-</span> <span class="number">2</span>; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> vertexCountPerCorner <span class="operator">-</span> n <span class="operator">-</span> <span class="number">2</span> <span class="operator">+</span> offsY; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> vertexCountPerCorner <span class="operator">-</span> n <span class="operator">-</span> <span class="number">2</span> <span class="operator">+</span> offsZ; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> vertexCountPerCorner <span class="operator">-</span> <span class="number">1</span>; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> vertexCountPerCorner <span class="operator">-</span> <span class="number">1</span> <span class="operator">+</span> offsZ; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> vertexCountPerCorner <span class="operator">-</span> <span class="number">1</span> <span class="operator">+</span> offsX; } <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> n <span class="operator">+</span> <span class="number">2</span>; <span class="operator">+</span><span class="operator">+</span>i) { <span class="comment">// Edge polygons</span> <span class="keyword">if</span> (winding <span class="operator">&</span><span class="operator">&</span> i <span class="operator"><</span> n <span class="operator">+</span> <span class="number">1</span>) { ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> i <span class="operator">+</span> <span class="number">1</span>; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> offsY <span class="operator">+</span> i <span class="operator">+</span> <span class="number">1</span>; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> offsY; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> offsY <span class="operator">+</span> i <span class="operator">+</span> <span class="number">1</span>; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> i; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> <span class="number">2</span> <span class="operator">*</span> i <span class="operator">+</span> <span class="number">2</span>; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> i <span class="operator">+</span> offsX; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> <span class="number">2</span> <span class="operator">*</span> i <span class="operator">+</span> offsX <span class="operator">+</span> <span class="number">2</span>; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> i <span class="operator">+</span> offsX; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> <span class="number">2</span> <span class="operator">*</span> i <span class="operator">+</span> <span class="number">2</span>; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> (corner <span class="operator">+</span> <span class="number">1</span>) <span class="operator">*</span> vertexCountPerCorner <span class="operator">-</span> <span class="number">1</span> <span class="operator">-</span> i; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> (corner <span class="operator">+</span> <span class="number">1</span>) <span class="operator">*</span> vertexCountPerCorner <span class="operator">-</span> <span class="number">2</span> <span class="operator">-</span> i; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> (corner <span class="operator">+</span> <span class="number">1</span>) <span class="operator">*</span> vertexCountPerCorner <span class="operator">-</span> <span class="number">1</span> <span class="operator">-</span> i <span class="operator">+</span> offsZ; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> (corner <span class="operator">+</span> <span class="number">1</span>) <span class="operator">*</span> vertexCountPerCorner <span class="operator">-</span> <span class="number">2</span> <span class="operator">-</span> i <span class="operator">+</span> offsZ; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> (corner <span class="operator">+</span> <span class="number">1</span>) <span class="operator">*</span> vertexCountPerCorner <span class="operator">-</span> <span class="number">1</span> <span class="operator">-</span> i <span class="operator">+</span> offsZ; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> (corner <span class="operator">+</span> <span class="number">1</span>) <span class="operator">*</span> vertexCountPerCorner <span class="operator">-</span> <span class="number">2</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"><</span><span class="operator">=</span> i; <span class="operator">+</span><span class="operator">+</span>j) { QVector3D normal <span class="operator">=</span> QVector3D(i <span class="operator">-</span> j<span class="operator">,</span> j<span class="operator">,</span> n <span class="operator">+</span> <span class="number">1</span> <span class="operator">-</span> i)<span class="operator">.</span>normalized(); QVector3D offset(<span class="number">0.5f</span> <span class="operator">-</span> r<span class="operator">,</span> <span class="number">0.5f</span> <span class="operator">-</span> r<span class="operator">,</span> <span class="number">0.5f</span> <span class="operator">-</span> r); QVector3D pos <span class="operator">=</span> centre <span class="operator">*</span> (offset <span class="operator">+</span> r <span class="operator">*</span> normal); vp<span class="operator">[</span>vidx<span class="operator">]</span><span class="operator">.</span>position <span class="operator">=</span> scale <span class="operator">*</span> pos; vp<span class="operator">[</span>vidx<span class="operator">]</span><span class="operator">.</span>normal <span class="operator">=</span> centre <span class="operator">*</span> normal; vp<span class="operator">[</span>vidx<span class="operator">]</span><span class="operator">.</span>texCoord <span class="operator">=</span> QVector2D(pos<span class="operator">.</span>x() <span class="operator">+</span> <span class="number">0.5f</span><span class="operator">,</span> pos<span class="operator">.</span>y() <span class="operator">+</span> <span class="number">0.5f</span>); <span class="comment">// Corner polygons</span> <span class="keyword">if</span> (i <span class="operator"><</span> n <span class="operator">+</span> <span class="number">1</span>) { ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> i <span class="operator">+</span> <span class="number">2</span> <span class="operator">-</span> winding; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> i <span class="operator">+</span> <span class="number">1</span> <span class="operator">+</span> winding; } <span class="keyword">if</span> (i <span class="operator"><</span> n) { ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> i <span class="operator">+</span> <span class="number">1</span> <span class="operator">+</span> winding; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> i <span class="operator">+</span> <span class="number">2</span> <span class="operator">-</span> winding; ip<span class="operator">[</span>iidx<span class="operator">+</span><span class="operator">+</span><span class="operator">]</span> <span class="operator">=</span> vidx <span class="operator">+</span> <span class="number">2</span> <span class="operator">*</span> i <span class="operator">+</span> <span class="number">4</span>; } <span class="operator">+</span><span class="operator">+</span>vidx; } } } m_ib<span class="operator">.</span>unlock(); m_vb<span class="operator">.</span>unlock(); }</pre> </div> <!-- @@@demos/boxes/roundedbox.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its subsidiaries. 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