<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>roundedbox.cpp Example File | Qt Widgets 5.12.2</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-graphicsview-boxes-example.html">Boxes</a></td><td >roundedbox.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtwidgets-index.html">Qt 5.12.2 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">roundedbox.cpp Example File</h1> <span class="subtitle">graphicsview/boxes/roundedbox.cpp</span> <!-- $$$graphicsview/boxes/roundedbox.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 demonstration applications 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: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "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="../qtcore/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> <!-- @@@graphicsview/boxes/roundedbox.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. 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 of their respective owners. </p> </div> </body> </html>