<?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>customaffector.qml Example File | Qt Quick 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="qtquick-index.html">Qt Quick</a></td><td ><a href="qtquick-particles-affectors-example.html">Qt Quick Particles Examples - Affectors</a></td><td >customaffector.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">customaffector.qml Example File</h1> <span class="subtitle">particles/affectors/content/customaffector.qml</span> <!-- $$$particles/affectors/content/customaffector.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 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> import QtQuick 2.0 import QtQuick.Particles 2.0 <span class="type"><a href="qml-qtquick-item.html">Item</a></span> { <span class="name">width</span>: <span class="number">360</span> <span class="name">height</span>: <span class="number">600</span> <span class="type"><a href="qml-qtquick-image.html">Image</a></span> { <span class="name">source</span>: <span class="string">"../../images/backgroundLeaves.jpg"</span> <span class="name">anchors</span>.fill: <span class="name">parent</span> } <span class="type"><a href="qml-qtquick-particles-particlesystem.html">ParticleSystem</a></span> { <span class="name">anchors</span>.fill: <span class="name">parent</span> <span class="type"><a href="qml-qtquick-particles-emitter.html">Emitter</a></span> { <span class="name">width</span>: <span class="name">parent</span>.<span class="name">width</span> <span class="name">emitRate</span>: <span class="number">4</span> <span class="name">lifeSpan</span>: <span class="number">14000</span> <span class="name">size</span>: <span class="number">80</span> <span class="name">velocity</span>: <span class="name">PointDirection</span> { <span class="name">y</span>: <span class="number">60</span> } } <span class="type"><a href="qml-qtquick-particles-wander.html">Wander</a></span> { <span class="name">anchors</span>.fill: <span class="name">parent</span> <span class="name">anchors</span>.bottomMargin: <span class="number">100</span> <span class="name">xVariance</span>: <span class="number">60</span> <span class="name">pace</span>: <span class="number">60</span> } <span class="type"><a href="qml-qtquick-particles-affector.html">Affector</a></span> { property <span class="type">real</span> <span class="name">coefficient</span>: <span class="number">0.1</span> property <span class="type">real</span> <span class="name">velocity</span>: <span class="number">1.5</span> <span class="name">width</span>: <span class="name">parent</span>.<span class="name">width</span> <span class="name">height</span>: <span class="name">parent</span>.<span class="name">height</span> <span class="operator">-</span> <span class="number">100</span> <span class="name">onAffectParticles</span>: { <span class="comment">/* //Linear movement if (particle.r == 0) { particle.r = Math.random() > 0.5 ? -1 : 1; } else if (particle.r == 1) { particle.rotation += velocity * dt; if (particle.rotation >= maxAngle) particle.r = -1; } else if (particle.r == -1) { particle.rotation -= velocity * dt; if (particle.rotation <= -1 * maxAngle) particle.r = 1; } */</span> <span class="comment">//Wobbly movement</span> <span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">i</span>=<span class="number">0</span>; <span class="name">i</span><span class="operator"><</span><span class="name">particles</span>.<span class="name">length</span>; i++) { var <span class="name">particle</span> = <span class="name">particles</span>[<span class="name">i</span>]; <span class="keyword">if</span> (<span class="name">particle</span>.<span class="name">r</span> <span class="operator">==</span> <span class="number">0.0</span>) { <span class="name">particle</span>.<span class="name">r</span> <span class="operator">=</span> <span class="name">Math</span>.<span class="name">random</span>() <span class="operator">+</span> <span class="number">0.01</span>; } <span class="name">particle</span>.<span class="name">rotation</span> <span class="operator">+=</span> <span class="name">velocity</span> <span class="operator">*</span> <span class="name">particle</span>.<span class="name">r</span> <span class="operator">*</span> <span class="name">dt</span>; <span class="name">particle</span>.<span class="name">r</span> <span class="operator">-=</span> <span class="name">particle</span>.<span class="name">rotation</span> <span class="operator">*</span> <span class="name">coefficient</span>; <span class="keyword">if</span> (<span class="name">particle</span>.<span class="name">r</span> <span class="operator">==</span> <span class="number">0.0</span>) <span class="name">particle</span>.<span class="name">r</span> <span class="operator">-=</span> <span class="name">particle</span>.<span class="name">rotation</span> <span class="operator">*</span> <span class="number">0.000001</span>; <span class="name">particle</span>.<span class="name">update</span> <span class="operator">=</span> <span class="number">1</span>; } } } <span class="type"><a href="qml-qtquick-particles-affector.html">Affector</a></span> {<span class="comment">//Custom Friction, adds some 'randomness'</span> <span class="name">x</span>: -<span class="number">60</span> <span class="name">width</span>: <span class="name">parent</span>.<span class="name">width</span> <span class="operator">+</span> <span class="number">120</span> <span class="name">height</span>: <span class="number">100</span> <span class="name">anchors</span>.bottom: <span class="name">parent</span>.<span class="name">bottom</span> <span class="name">onAffectParticles</span>: { <span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">i</span>=<span class="number">0</span>; <span class="name">i</span><span class="operator"><</span><span class="name">particles</span>.<span class="name">length</span>; i++) { var <span class="name">particle</span> = <span class="name">particles</span>[<span class="name">i</span>]; var <span class="name">pseudoRand</span> = (<span class="name">Math</span>.<span class="name">floor</span>(<span class="name">particle</span>.<span class="name">t</span><span class="operator">*</span><span class="number">1327</span>) <span class="operator">%</span> <span class="number">10</span>) <span class="operator">+</span> <span class="number">1</span>; var <span class="name">yslow</span> = <span class="name">dt</span> <span class="operator">*</span> <span class="name">pseudoRand</span> <span class="operator">*</span> <span class="number">0.5</span> <span class="operator">+</span> <span class="number">1</span>; var <span class="name">xslow</span> = <span class="name">dt</span> <span class="operator">*</span> <span class="name">pseudoRand</span> <span class="operator">*</span> <span class="number">0.05</span> <span class="operator">+</span> <span class="number">1</span>; <span class="keyword">if</span> (<span class="name">particle</span>.<span class="name">vy</span> <span class="operator"><</span> <span class="number">1</span>) <span class="name">particle</span>.<span class="name">vy</span> <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">else</span> <span class="name">particle</span>.<span class="name">vy</span> <span class="operator">=</span> (<span class="name">particle</span>.<span class="name">vy</span> <span class="operator">/</span> <span class="name">yslow</span>); <span class="keyword">if</span> (<span class="name">particle</span>.<span class="name">vx</span> <span class="operator"><</span> <span class="number">1</span>) <span class="name">particle</span>.<span class="name">vx</span> <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">else</span> <span class="name">particle</span>.<span class="name">vx</span> <span class="operator">=</span> (<span class="name">particle</span>.<span class="name">vx</span> <span class="operator">/</span> <span class="name">xslow</span>); <span class="name">particle</span>.<span class="name">update</span> <span class="operator">=</span> <span class="number">true</span>; } } } <span class="type"><a href="qml-qtquick-particles-imageparticle.html">ImageParticle</a></span> { <span class="name">anchors</span>.fill: <span class="name">parent</span> <span class="name">id</span>: <span class="name">particles</span> <span class="name">sprites</span>: [<span class="type"><a href="qml-qtquick-sprite.html">Sprite</a></span> { <span class="name">source</span>: <span class="string">"../../images/realLeaf1.png"</span> <span class="name">frameCount</span>: <span class="number">1</span> <span class="name">frameDuration</span>: <span class="number">1</span> <span class="name">to</span>: {"a":<span class="number">1</span>, "b":<span class="number">1</span>, "c":<span class="number">1</span>, "d":<span class="number">1</span>} }, <span class="type"><a href="qml-qtquick-sprite.html">Sprite</a></span> { <span class="name">name</span>: <span class="string">"a"</span> <span class="name">source</span>: <span class="string">"../../images/realLeaf1.png"</span> <span class="name">frameCount</span>: <span class="number">1</span> <span class="name">frameDuration</span>: <span class="number">10000</span> }, <span class="type"><a href="qml-qtquick-sprite.html">Sprite</a></span> { <span class="name">name</span>: <span class="string">"b"</span> <span class="name">source</span>: <span class="string">"../../images/realLeaf2.png"</span> <span class="name">frameCount</span>: <span class="number">1</span> <span class="name">frameDuration</span>: <span class="number">10000</span> }, <span class="type"><a href="qml-qtquick-sprite.html">Sprite</a></span> { <span class="name">name</span>: <span class="string">"c"</span> <span class="name">source</span>: <span class="string">"../../images/realLeaf3.png"</span> <span class="name">frameCount</span>: <span class="number">1</span> <span class="name">frameDuration</span>: <span class="number">10000</span> }, <span class="type"><a href="qml-qtquick-sprite.html">Sprite</a></span> { <span class="name">name</span>: <span class="string">"d"</span> <span class="name">source</span>: <span class="string">"../../images/realLeaf4.png"</span> <span class="name">frameCount</span>: <span class="number">1</span> <span class="name">frameDuration</span>: <span class="number">10000</span> } ] <span class="name">z</span>:<span class="number">4</span> } } } </pre> </div> <!-- @@@particles/affectors/content/customaffector.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>