<?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>camera.cpp Example File | Qt GUI 5.12.6</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="qtgui-index.html">Qt GUI</a></td><td ><a href="qtgui-hellovulkancubes-example.html">Hello Vulkan Cubes Example</a></td><td >camera.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtgui-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">camera.cpp Example File</h1> <span class="subtitle">hellovulkancubes/camera.cpp</span> <!-- $$$hellovulkancubes/camera.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2017 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 "camera.h"</span> Camera<span class="operator">::</span>Camera(<span class="keyword">const</span> QVector3D <span class="operator">&</span>pos) : m_forward(<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">1.0f</span>)<span class="operator">,</span> m_right(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">0.0f</span><span class="operator">,</span> <span class="number">0.0f</span>)<span class="operator">,</span> m_up(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="number">0.0f</span>)<span class="operator">,</span> m_pos(pos)<span class="operator">,</span> m_yaw(<span class="number">0.0f</span>)<span class="operator">,</span> m_pitch(<span class="number">0.0f</span>) { } <span class="keyword">static</span> <span class="keyword">inline</span> <span class="type">void</span> clamp360(<span class="type">float</span> <span class="operator">*</span>v) { <span class="keyword">if</span> (<span class="operator">*</span>v <span class="operator">></span> <span class="number">360.0f</span>) <span class="operator">*</span>v <span class="operator">-</span><span class="operator">=</span> <span class="number">360.0f</span>; <span class="keyword">if</span> (<span class="operator">*</span>v <span class="operator"><</span> <span class="operator">-</span><span class="number">360.0f</span>) <span class="operator">*</span>v <span class="operator">+</span><span class="operator">=</span> <span class="number">360.0f</span>; } <span class="type">void</span> Camera<span class="operator">::</span>yaw(<span class="type">float</span> degrees) { m_yaw <span class="operator">+</span><span class="operator">=</span> degrees; clamp360(<span class="operator">&</span>m_yaw); m_yawMatrix<span class="operator">.</span>setToIdentity(); m_yawMatrix<span class="operator">.</span>rotate(m_yaw<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span>); QMatrix4x4 rotMat <span class="operator">=</span> m_pitchMatrix <span class="operator">*</span> m_yawMatrix; m_forward <span class="operator">=</span> (QVector4D(<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">1.0f</span><span class="operator">,</span> <span class="number">0.0f</span>) <span class="operator">*</span> rotMat)<span class="operator">.</span>toVector3D(); m_right <span class="operator">=</span> (QVector4D(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">0.0f</span><span class="operator">,</span> <span class="number">0.0f</span><span class="operator">,</span> <span class="number">0.0f</span>) <span class="operator">*</span> rotMat)<span class="operator">.</span>toVector3D(); } <span class="type">void</span> Camera<span class="operator">::</span>pitch(<span class="type">float</span> degrees) { m_pitch <span class="operator">+</span><span class="operator">=</span> degrees; clamp360(<span class="operator">&</span>m_pitch); m_pitchMatrix<span class="operator">.</span>setToIdentity(); m_pitchMatrix<span class="operator">.</span>rotate(m_pitch<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>); QMatrix4x4 rotMat <span class="operator">=</span> m_pitchMatrix <span class="operator">*</span> m_yawMatrix; m_forward <span class="operator">=</span> (QVector4D(<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">1.0f</span><span class="operator">,</span> <span class="number">0.0f</span>) <span class="operator">*</span> rotMat)<span class="operator">.</span>toVector3D(); m_up <span class="operator">=</span> (QVector4D(<span class="number">0.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="number">0.0f</span><span class="operator">,</span> <span class="number">0.0f</span>) <span class="operator">*</span> rotMat)<span class="operator">.</span>toVector3D(); } <span class="type">void</span> Camera<span class="operator">::</span>walk(<span class="type">float</span> amount) { m_pos<span class="operator">[</span><span class="number">0</span><span class="operator">]</span> <span class="operator">+</span><span class="operator">=</span> amount <span class="operator">*</span> m_forward<span class="operator">.</span>x(); m_pos<span class="operator">[</span><span class="number">2</span><span class="operator">]</span> <span class="operator">+</span><span class="operator">=</span> amount <span class="operator">*</span> m_forward<span class="operator">.</span>z(); } <span class="type">void</span> Camera<span class="operator">::</span>strafe(<span class="type">float</span> amount) { m_pos<span class="operator">[</span><span class="number">0</span><span class="operator">]</span> <span class="operator">+</span><span class="operator">=</span> amount <span class="operator">*</span> m_right<span class="operator">.</span>x(); m_pos<span class="operator">[</span><span class="number">2</span><span class="operator">]</span> <span class="operator">+</span><span class="operator">=</span> amount <span class="operator">*</span> m_right<span class="operator">.</span>z(); } QMatrix4x4 Camera<span class="operator">::</span>viewMatrix() <span class="keyword">const</span> { QMatrix4x4 m <span class="operator">=</span> m_pitchMatrix <span class="operator">*</span> m_yawMatrix; m<span class="operator">.</span>translate(<span class="operator">-</span>m_pos); <span class="keyword">return</span> m; } </pre> </div> <!-- @@@hellovulkancubes/camera.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>