<?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>BarEntity.qml Example File | Qt 3D 5.9</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 5.9</td><td ><a href="qt3d-index.html">Qt 3D</a></td><td ><a href="qt3d-audio-visualizer-qml-example.html">Qt 3D: Audio Visualizer Example</a></td><td >BarEntity.qml Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</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">BarEntity.qml Example File</h1> <span class="subtitle">audio-visualizer-qml/BarEntity.qml</span> <!-- $$$audio-visualizer-qml/BarEntity.qml-description --> <div class="descr"> <a name="details"></a> <pre class="qml"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2017 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the Qt3D module 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> import Qt3D.Core 2.0 import Qt3D.Render 2.0 import Qt3D.Extras 2.0 import QtQuick 2.4 as QQ2 <span class="type"><a href="qml-qt3d-core-entity.html">Entity</a></span> { property <span class="type">int</span> <span class="name">rotationTimeMs</span>: <span class="number">0</span> property <span class="type">int</span> <span class="name">entityIndex</span>: <span class="number">0</span> property <span class="type">int</span> <span class="name">entityCount</span>: <span class="number">0</span> property <span class="type">int</span> <span class="name">startAngle</span>: <span class="number">0</span> <span class="operator">+</span> <span class="number">360</span> <span class="operator">/</span> <span class="name">entityCount</span> <span class="operator">*</span> <span class="name">entityIndex</span> property <span class="type">bool</span> <span class="name">needsNewMagnitude</span>: <span class="number">true</span> property <span class="type">real</span> <span class="name">magnitude</span>: <span class="number">0</span> property <span class="type">real</span> <span class="name">animWeight</span>: <span class="number">0</span> property <span class="type">color</span> <span class="name">lowColor</span>: <span class="string">"black"</span> property <span class="type">color</span> <span class="name">highColor</span>: <span class="string">"#b3b3b3"</span> property <span class="type">color</span> <span class="name">barColor</span>: <span class="name">lowColor</span> property <span class="type">string</span> <span class="name">entityAnimationsState</span>: <span class="string">"stopped"</span> property <span class="type">bool</span> <span class="name">entityAnimationsPlaying</span>: <span class="number">true</span> property <span class="type">var</span> <span class="name">entityMesh</span>: <span class="number">null</span> <span class="name">onEntityAnimationsStateChanged</span>: { <span class="keyword">if</span> (<span class="name">animationState</span> <span class="operator">==</span> <span class="string">"paused"</span>) { <span class="keyword">if</span> (<span class="name">angleAnimation</span>.<span class="name">running</span>) <span class="name">angleAnimation</span>.<span class="name">pause</span>() <span class="keyword">if</span> (<span class="name">barColorAnimations</span>.<span class="name">running</span>) <span class="name">barColorAnimations</span>.<span class="name">pause</span>() } <span class="keyword">else</span> <span class="keyword">if</span> (<span class="name">animationState</span> <span class="operator">==</span> <span class="string">"playing"</span>){ <span class="name">needsNewMagnitude</span> <span class="operator">=</span> <span class="number">true</span>; <span class="keyword">if</span> (<span class="name">heightDecreaseAnimation</span>.<span class="name">running</span>) <span class="name">heightDecreaseAnimation</span>.<span class="name">stop</span>() <span class="keyword">if</span> (<span class="name">angleAnimation</span>.<span class="name">paused</span>) { <span class="name">angleAnimation</span>.<span class="name">resume</span>() } <span class="keyword">else</span> <span class="keyword">if</span> (!<span class="name">entityAnimationsPlaying</span>) { <span class="name">magnitude</span> <span class="operator">=</span> <span class="number">0</span> <span class="name">angleAnimation</span>.<span class="name">start</span>() <span class="name">entityAnimationsPlaying</span> <span class="operator">=</span> <span class="number">true</span> } <span class="keyword">if</span> (<span class="name">barColorAnimations</span>.<span class="name">paused</span>) <span class="name">barColorAnimations</span>.<span class="name">resume</span>() } <span class="keyword">else</span> { <span class="keyword">if</span> (<span class="name">animWeight</span> <span class="operator">!=</span> <span class="number">0</span>) <span class="name">heightDecreaseAnimation</span>.<span class="name">start</span>() <span class="name">needsNewMagnitude</span> <span class="operator">=</span> <span class="number">true</span> <span class="name">angleAnimation</span>.<span class="name">stop</span>() <span class="name">barColorAnimations</span>.<span class="name">stop</span>() <span class="name">entityAnimationsPlaying</span> <span class="operator">=</span> <span class="number">false</span> } } property <span class="type"><a href="qml-qt3d-render-material.html">Material</a></span> <span class="name">barMaterial</span>: <span class="name">PhongMaterial</span> { <span class="name">diffuse</span>: <span class="name">barColor</span> <span class="name">ambient</span>: <span class="name">Qt</span>.<span class="name">darker</span>(<span class="name">barColor</span>) <span class="name">specular</span>: <span class="string">"black"</span> <span class="name">shininess</span>: <span class="number">1</span> } property <span class="type"><a href="qml-qt3d-core-transform.html">Transform</a></span> <span class="name">angleTransform</span>: <span class="name">Transform</span> { property <span class="type">real</span> <span class="name">heightIncrease</span>: <span class="name">magnitude</span> <span class="operator">*</span> <span class="name">animWeight</span> property <span class="type">real</span> <span class="name">barAngle</span>: <span class="name">startAngle</span> <span class="name">matrix</span>: { var <span class="name">m</span> = <span class="name">Qt</span>.<span class="name">matrix4x4</span>() <span class="name">m</span>.<span class="name">rotate</span>(<span class="name">barAngle</span>, <span class="name">Qt</span>.<span class="name">vector3d</span>(<span class="number">0</span>, <span class="number">1</span>, <span class="number">0</span>)) <span class="name">m</span>.<span class="name">translate</span>(<span class="name">Qt</span>.<span class="name">vector3d</span>(<span class="number">1.1</span>, <span class="name">heightIncrease</span> <span class="operator">/</span> <span class="number">2</span> <span class="operator">-</span> <span class="name">heightIncrease</span> <span class="operator">*</span> <span class="number">0.05</span>, <span class="number">0</span>)) <span class="name">m</span>.<span class="name">scale</span>(<span class="name">Qt</span>.<span class="name">vector3d</span>(<span class="number">0.5</span>, <span class="name">heightIncrease</span> <span class="operator">*</span> <span class="number">15</span>, <span class="number">0.5</span>)) <span class="keyword">return</span> <span class="name">m</span>; } property <span class="type">real</span> <span class="name">compareAngle</span>: <span class="name">barAngle</span> <span class="name">onBarAngleChanged</span>: { <span class="name">compareAngle</span> <span class="operator">=</span> <span class="name">barAngle</span> <span class="keyword">if</span> (<span class="name">compareAngle</span> <span class="operator">></span> <span class="number">360</span>) <span class="name">compareAngle</span> <span class="operator">=</span> <span class="name">barAngle</span> <span class="operator">-</span> <span class="number">360</span> <span class="keyword">if</span> (<span class="name">compareAngle</span> <span class="operator">></span> <span class="number">180</span>) { <span class="name">parent</span>.<span class="name">enabled</span> <span class="operator">=</span> <span class="number">false</span> <span class="name">animWeight</span> <span class="operator">=</span> <span class="number">0</span> <span class="keyword">if</span> (<span class="name">needsNewMagnitude</span>) { <span class="comment">// Calculate the ms offset where the bar will be at the center point of the</span> <span class="comment">// visualization and fetch the correct magnitude for that point in time.</span> var <span class="name">offset</span> = (<span class="number">90.0</span> <span class="operator">+</span> <span class="number">360.0</span> <span class="operator">-</span> <span class="name">compareAngle</span>) <span class="operator">*</span> (<span class="name">rotationTimeMs</span> <span class="operator">/</span> <span class="number">360.0</span>) <span class="name">magnitude</span> <span class="operator">=</span> <span class="name">mediaPlayer</span>.<span class="name">getNextAudioLevel</span>(<span class="name">offset</span>) <span class="name">needsNewMagnitude</span> <span class="operator">=</span> <span class="number">false</span> } } <span class="keyword">else</span> { <span class="name">parent</span>.<span class="name">enabled</span> <span class="operator">=</span> <span class="number">true</span> <span class="comment">// Calculate a power of 2 curve for the bar animation that peaks at 90 degrees</span> <span class="name">animWeight</span> <span class="operator">=</span> <span class="name">Math</span>.<span class="name">min</span>((<span class="name">compareAngle</span> <span class="operator">/</span> <span class="number">90</span>), (<span class="number">180</span> <span class="operator">-</span> <span class="name">compareAngle</span>) <span class="operator">/</span> <span class="number">90</span>) <span class="name">animWeight</span> <span class="operator">=</span> <span class="name">animWeight</span> <span class="operator">*</span> <span class="name">animWeight</span> <span class="keyword">if</span> (!<span class="name">needsNewMagnitude</span>) { <span class="name">needsNewMagnitude</span> <span class="operator">=</span> <span class="number">true</span> <span class="name">barColorAnimations</span>.<span class="name">start</span>() } } } } <span class="name">components</span>: [<span class="name">entityMesh</span>, <span class="name">barMaterial</span>, <span class="name">angleTransform</span>] <span class="type">QQ2</span>.NumberAnimation { <span class="name">id</span>: <span class="name">angleAnimation</span> <span class="name">target</span>: <span class="name">angleTransform</span> <span class="name">property</span>: <span class="string">"barAngle"</span> <span class="name">duration</span>: <span class="name">rotationTimeMs</span> <span class="name">loops</span>: <span class="name">QQ2</span>.<span class="name">Animation</span>.<span class="name">Infinite</span> <span class="name">running</span>: <span class="number">true</span> <span class="name">from</span>: <span class="name">startAngle</span> <span class="name">to</span>: <span class="number">360</span> <span class="operator">+</span> <span class="name">startAngle</span> } <span class="type">QQ2</span>.NumberAnimation { <span class="name">id</span>: <span class="name">heightDecreaseAnimation</span> <span class="name">target</span>: <span class="name">angleTransform</span> <span class="name">property</span>: <span class="string">"heightIncrease"</span> <span class="name">duration</span>: <span class="number">400</span> <span class="name">running</span>: <span class="number">false</span> <span class="name">from</span>: <span class="name">angleTransform</span>.<span class="name">heightIncrease</span> <span class="name">to</span>: <span class="number">0</span> <span class="name">onStopped</span>: <span class="name">barColor</span> <span class="operator">=</span> <span class="name">lowColor</span> } property <span class="type">int</span> <span class="name">animationDuration</span>: <span class="name">angleAnimation</span>.<span class="name">duration</span> <span class="operator">/</span> <span class="number">6</span> QQ2.SequentialAnimation on <span class="name">barColor</span> { <span class="name">id</span>: <span class="name">barColorAnimations</span> <span class="name">running</span>: <span class="number">false</span> <span class="type">QQ2</span>.ColorAnimation { <span class="name">from</span>: <span class="name">lowColor</span> <span class="name">to</span>: <span class="name">highColor</span> <span class="name">duration</span>: <span class="name">animationDuration</span> } <span class="type">QQ2</span>.PauseAnimation { <span class="name">duration</span>: <span class="name">animationDuration</span> } <span class="type">QQ2</span>.ColorAnimation { <span class="name">from</span>: <span class="name">highColor</span> <span class="name">to</span>: <span class="name">lowColor</span> <span class="name">duration</span>: <span class="name">animationDuration</span> } } } </pre> </div> <!-- @@@audio-visualizer-qml/BarEntity.qml --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2017 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>