<?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>logo.cpp Example File | Qt OpenGL</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="qtopengl-index.html">Qt OpenGL</a></td><td ><a href="qtopengl-hellogl2-example.html">Hello GL2 Example</a></td><td >logo.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtopengl-index.html">Qt 5.12.6 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">logo.cpp Example File</h1> <span class="subtitle">hellogl2/logo.cpp</span> <!-- $$$hellogl2/logo.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: ** ** "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 "logo.h"</span> <span class="preprocessor">#include <qmath.h></span> Logo<span class="operator">::</span>Logo() : m_count(<span class="number">0</span>) { m_data<span class="operator">.</span>resize(<span class="number">2500</span> <span class="operator">*</span> <span class="number">6</span>); <span class="keyword">const</span> GLfloat x1 <span class="operator">=</span> <span class="operator">+</span><span class="number">0.06f</span>; <span class="keyword">const</span> GLfloat y1 <span class="operator">=</span> <span class="operator">-</span><span class="number">0.14f</span>; <span class="keyword">const</span> GLfloat x2 <span class="operator">=</span> <span class="operator">+</span><span class="number">0.14f</span>; <span class="keyword">const</span> GLfloat y2 <span class="operator">=</span> <span class="operator">-</span><span class="number">0.06f</span>; <span class="keyword">const</span> GLfloat x3 <span class="operator">=</span> <span class="operator">+</span><span class="number">0.08f</span>; <span class="keyword">const</span> GLfloat y3 <span class="operator">=</span> <span class="operator">+</span><span class="number">0.00f</span>; <span class="keyword">const</span> GLfloat x4 <span class="operator">=</span> <span class="operator">+</span><span class="number">0.30f</span>; <span class="keyword">const</span> GLfloat y4 <span class="operator">=</span> <span class="operator">+</span><span class="number">0.22f</span>; quad(x1<span class="operator">,</span> y1<span class="operator">,</span> x2<span class="operator">,</span> y2<span class="operator">,</span> y2<span class="operator">,</span> x2<span class="operator">,</span> y1<span class="operator">,</span> x1); quad(x3<span class="operator">,</span> y3<span class="operator">,</span> x4<span class="operator">,</span> y4<span class="operator">,</span> y4<span class="operator">,</span> x4<span class="operator">,</span> y3<span class="operator">,</span> x3); extrude(x1<span class="operator">,</span> y1<span class="operator">,</span> x2<span class="operator">,</span> y2); extrude(x2<span class="operator">,</span> y2<span class="operator">,</span> y2<span class="operator">,</span> x2); extrude(y2<span class="operator">,</span> x2<span class="operator">,</span> y1<span class="operator">,</span> x1); extrude(y1<span class="operator">,</span> x1<span class="operator">,</span> x1<span class="operator">,</span> y1); extrude(x3<span class="operator">,</span> y3<span class="operator">,</span> x4<span class="operator">,</span> y4); extrude(x4<span class="operator">,</span> y4<span class="operator">,</span> y4<span class="operator">,</span> x4); extrude(y4<span class="operator">,</span> x4<span class="operator">,</span> y3<span class="operator">,</span> x3); <span class="keyword">const</span> <span class="type">int</span> NumSectors <span class="operator">=</span> <span class="number">100</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"><</span> NumSectors; <span class="operator">+</span><span class="operator">+</span>i) { GLfloat angle <span class="operator">=</span> (i <span class="operator">*</span> <span class="number">2</span> <span class="operator">*</span> M_PI) <span class="operator">/</span> NumSectors; GLfloat angleSin <span class="operator">=</span> <a href="../qtcore/qtmath.html#qSin">qSin</a>(angle); GLfloat angleCos <span class="operator">=</span> <a href="../qtcore/qtmath.html#qCos">qCos</a>(angle); <span class="keyword">const</span> GLfloat x5 <span class="operator">=</span> <span class="number">0.30f</span> <span class="operator">*</span> angleSin; <span class="keyword">const</span> GLfloat y5 <span class="operator">=</span> <span class="number">0.30f</span> <span class="operator">*</span> angleCos; <span class="keyword">const</span> GLfloat x6 <span class="operator">=</span> <span class="number">0.20f</span> <span class="operator">*</span> angleSin; <span class="keyword">const</span> GLfloat y6 <span class="operator">=</span> <span class="number">0.20f</span> <span class="operator">*</span> angleCos; angle <span class="operator">=</span> ((i <span class="operator">+</span> <span class="number">1</span>) <span class="operator">*</span> <span class="number">2</span> <span class="operator">*</span> M_PI) <span class="operator">/</span> NumSectors; angleSin <span class="operator">=</span> <a href="../qtcore/qtmath.html#qSin">qSin</a>(angle); angleCos <span class="operator">=</span> <a href="../qtcore/qtmath.html#qCos">qCos</a>(angle); <span class="keyword">const</span> GLfloat x7 <span class="operator">=</span> <span class="number">0.20f</span> <span class="operator">*</span> angleSin; <span class="keyword">const</span> GLfloat y7 <span class="operator">=</span> <span class="number">0.20f</span> <span class="operator">*</span> angleCos; <span class="keyword">const</span> GLfloat x8 <span class="operator">=</span> <span class="number">0.30f</span> <span class="operator">*</span> angleSin; <span class="keyword">const</span> GLfloat y8 <span class="operator">=</span> <span class="number">0.30f</span> <span class="operator">*</span> angleCos; quad(x5<span class="operator">,</span> y5<span class="operator">,</span> x6<span class="operator">,</span> y6<span class="operator">,</span> x7<span class="operator">,</span> y7<span class="operator">,</span> x8<span class="operator">,</span> y8); extrude(x6<span class="operator">,</span> y6<span class="operator">,</span> x7<span class="operator">,</span> y7); extrude(x8<span class="operator">,</span> y8<span class="operator">,</span> x5<span class="operator">,</span> y5); } } <span class="type">void</span> Logo<span class="operator">::</span>add(<span class="keyword">const</span> QVector3D <span class="operator">&</span>v<span class="operator">,</span> <span class="keyword">const</span> QVector3D <span class="operator">&</span>n) { GLfloat <span class="operator">*</span>p <span class="operator">=</span> m_data<span class="operator">.</span>data() <span class="operator">+</span> m_count; <span class="operator">*</span>p<span class="operator">+</span><span class="operator">+</span> <span class="operator">=</span> v<span class="operator">.</span>x(); <span class="operator">*</span>p<span class="operator">+</span><span class="operator">+</span> <span class="operator">=</span> v<span class="operator">.</span>y(); <span class="operator">*</span>p<span class="operator">+</span><span class="operator">+</span> <span class="operator">=</span> v<span class="operator">.</span>z(); <span class="operator">*</span>p<span class="operator">+</span><span class="operator">+</span> <span class="operator">=</span> n<span class="operator">.</span>x(); <span class="operator">*</span>p<span class="operator">+</span><span class="operator">+</span> <span class="operator">=</span> n<span class="operator">.</span>y(); <span class="operator">*</span>p<span class="operator">+</span><span class="operator">+</span> <span class="operator">=</span> n<span class="operator">.</span>z(); m_count <span class="operator">+</span><span class="operator">=</span> <span class="number">6</span>; } <span class="type">void</span> Logo<span class="operator">::</span>quad(GLfloat x1<span class="operator">,</span> GLfloat y1<span class="operator">,</span> GLfloat x2<span class="operator">,</span> GLfloat y2<span class="operator">,</span> GLfloat x3<span class="operator">,</span> GLfloat y3<span class="operator">,</span> GLfloat x4<span class="operator">,</span> GLfloat y4) { QVector3D n <span class="operator">=</span> QVector3D<span class="operator">::</span>normal(QVector3D(x4 <span class="operator">-</span> x1<span class="operator">,</span> y4 <span class="operator">-</span> y1<span class="operator">,</span> <span class="number">0.0f</span>)<span class="operator">,</span> QVector3D(x2 <span class="operator">-</span> x1<span class="operator">,</span> y2 <span class="operator">-</span> y1<span class="operator">,</span> <span class="number">0.0f</span>)); add(QVector3D(x1<span class="operator">,</span> y1<span class="operator">,</span> <span class="operator">-</span><span class="number">0.05f</span>)<span class="operator">,</span> n); add(QVector3D(x4<span class="operator">,</span> y4<span class="operator">,</span> <span class="operator">-</span><span class="number">0.05f</span>)<span class="operator">,</span> n); add(QVector3D(x2<span class="operator">,</span> y2<span class="operator">,</span> <span class="operator">-</span><span class="number">0.05f</span>)<span class="operator">,</span> n); add(QVector3D(x3<span class="operator">,</span> y3<span class="operator">,</span> <span class="operator">-</span><span class="number">0.05f</span>)<span class="operator">,</span> n); add(QVector3D(x2<span class="operator">,</span> y2<span class="operator">,</span> <span class="operator">-</span><span class="number">0.05f</span>)<span class="operator">,</span> n); add(QVector3D(x4<span class="operator">,</span> y4<span class="operator">,</span> <span class="operator">-</span><span class="number">0.05f</span>)<span class="operator">,</span> n); n <span class="operator">=</span> QVector3D<span class="operator">::</span>normal(QVector3D(x1 <span class="operator">-</span> x4<span class="operator">,</span> y1 <span class="operator">-</span> y4<span class="operator">,</span> <span class="number">0.0f</span>)<span class="operator">,</span> QVector3D(x2 <span class="operator">-</span> x4<span class="operator">,</span> y2 <span class="operator">-</span> y4<span class="operator">,</span> <span class="number">0.0f</span>)); add(QVector3D(x4<span class="operator">,</span> y4<span class="operator">,</span> <span class="number">0.05f</span>)<span class="operator">,</span> n); add(QVector3D(x1<span class="operator">,</span> y1<span class="operator">,</span> <span class="number">0.05f</span>)<span class="operator">,</span> n); add(QVector3D(x2<span class="operator">,</span> y2<span class="operator">,</span> <span class="number">0.05f</span>)<span class="operator">,</span> n); add(QVector3D(x2<span class="operator">,</span> y2<span class="operator">,</span> <span class="number">0.05f</span>)<span class="operator">,</span> n); add(QVector3D(x3<span class="operator">,</span> y3<span class="operator">,</span> <span class="number">0.05f</span>)<span class="operator">,</span> n); add(QVector3D(x4<span class="operator">,</span> y4<span class="operator">,</span> <span class="number">0.05f</span>)<span class="operator">,</span> n); } <span class="type">void</span> Logo<span class="operator">::</span>extrude(GLfloat x1<span class="operator">,</span> GLfloat y1<span class="operator">,</span> GLfloat x2<span class="operator">,</span> GLfloat y2) { QVector3D n <span class="operator">=</span> QVector3D<span class="operator">::</span>normal(QVector3D(<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">0.1f</span>)<span class="operator">,</span> QVector3D(x2 <span class="operator">-</span> x1<span class="operator">,</span> y2 <span class="operator">-</span> y1<span class="operator">,</span> <span class="number">0.0f</span>)); add(QVector3D(x1<span class="operator">,</span> y1<span class="operator">,</span> <span class="operator">+</span><span class="number">0.05f</span>)<span class="operator">,</span> n); add(QVector3D(x1<span class="operator">,</span> y1<span class="operator">,</span> <span class="operator">-</span><span class="number">0.05f</span>)<span class="operator">,</span> n); add(QVector3D(x2<span class="operator">,</span> y2<span class="operator">,</span> <span class="operator">+</span><span class="number">0.05f</span>)<span class="operator">,</span> n); add(QVector3D(x2<span class="operator">,</span> y2<span class="operator">,</span> <span class="operator">-</span><span class="number">0.05f</span>)<span class="operator">,</span> n); add(QVector3D(x2<span class="operator">,</span> y2<span class="operator">,</span> <span class="operator">+</span><span class="number">0.05f</span>)<span class="operator">,</span> n); add(QVector3D(x1<span class="operator">,</span> y1<span class="operator">,</span> <span class="operator">-</span><span class="number">0.05f</span>)<span class="operator">,</span> n); } </pre> </div> <!-- @@@hellogl2/logo.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>