<?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>attractor.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 >attractor.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">attractor.qml Example File</h1> <span class="subtitle">particles/affectors/content/attractor.qml</span> <!-- $$$particles/affectors/content/attractor.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-rectangle.html">Rectangle</a></span> { <span class="name">id</span>: <span class="name">root</span> <span class="name">width</span>: <span class="number">360</span> <span class="name">height</span>: <span class="number">540</span> <span class="name">color</span>: <span class="string">"black"</span> <span class="type"><a href="qml-qtquick-image.html">Image</a></span> { <span class="name">source</span>: <span class="string">"../../images/finalfrontier.png"</span> <span class="name">anchors</span>.centerIn:<span class="name">parent</span> } <span class="type"><a href="qml-qtquick-particles-particlesystem.html">ParticleSystem</a></span> { <span class="name">id</span>: <span class="name">particles</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">group</span>: <span class="string">"stars"</span> <span class="name">emitRate</span>: <span class="number">40</span> <span class="name">lifeSpan</span>: <span class="number">4000</span> <span class="name">enabled</span>: <span class="number">true</span> <span class="name">size</span>: <span class="number">30</span> <span class="name">sizeVariation</span>: <span class="number">10</span> <span class="name">velocity</span>: <span class="name">PointDirection</span> { <span class="name">x</span>: <span class="number">220</span>; <span class="name">xVariation</span>: <span class="number">40</span> } <span class="name">height</span>: <span class="name">parent</span>.<span class="name">height</span> } <span class="type"><a href="qml-qtquick-particles-emitter.html">Emitter</a></span> { <span class="name">group</span>: <span class="string">"roids"</span> <span class="name">emitRate</span>: <span class="number">10</span> <span class="name">lifeSpan</span>: <span class="number">4000</span> <span class="name">enabled</span>: <span class="number">true</span> <span class="name">size</span>: <span class="number">30</span> <span class="name">sizeVariation</span>: <span class="number">10</span> <span class="name">velocity</span>: <span class="name">PointDirection</span> { <span class="name">x</span>: <span class="number">220</span>; <span class="name">xVariation</span>: <span class="number">40</span> } <span class="name">height</span>: <span class="name">parent</span>.<span class="name">height</span> } <span class="type"><a href="qml-qtquick-particles-imageparticle.html">ImageParticle</a></span> { <span class="name">id</span>: <span class="name">stars</span> <span class="name">groups</span>: [<span class="string">"stars"</span>] <span class="name">source</span>: <span class="string">"qrc:///particleresources/star.png"</span> <span class="name">color</span>: <span class="string">"white"</span> <span class="name">colorVariation</span>: <span class="number">0.1</span> <span class="name">alpha</span>: <span class="number">0</span> } <span class="type"><a href="qml-qtquick-particles-imageparticle.html">ImageParticle</a></span> { <span class="name">id</span>: <span class="name">roids</span> <span class="name">groups</span>: [<span class="string">"roids"</span>] <span class="name">sprites</span>: <span class="name">Sprite</span> { <span class="name">id</span>: <span class="name">spinState</span> <span class="name">name</span>: <span class="string">"spinning"</span> <span class="name">source</span>: <span class="string">"../../images/meteor.png"</span> <span class="name">frameCount</span>: <span class="number">35</span> <span class="name">frameDuration</span>: <span class="number">60</span> } } <span class="type"><a href="qml-qtquick-particles-imageparticle.html">ImageParticle</a></span> { <span class="name">id</span>: <span class="name">shot</span> <span class="name">groups</span>: [<span class="string">"shot"</span>] <span class="name">source</span>: <span class="string">"qrc:///particleresources/star.png"</span> <span class="name">color</span>: <span class="string">"#0FF06600"</span> <span class="name">colorVariation</span>: <span class="number">0.3</span> } <span class="type"><a href="qml-qtquick-particles-imageparticle.html">ImageParticle</a></span> { <span class="name">id</span>: <span class="name">engine</span> <span class="name">groups</span>: [<span class="string">"engine"</span>] <span class="name">source</span>: <span class="string">"qrc:///particleresources/fuzzydot.png"</span> <span class="name">color</span>: <span class="string">"orange"</span> SequentialAnimation on <span class="name">color</span> { <span class="name">loops</span>: <span class="name">Animation</span>.<span class="name">Infinite</span> <span class="type"><a href="qml-qtquick-coloranimation.html">ColorAnimation</a></span> { <span class="name">from</span>: <span class="string">"red"</span> <span class="name">to</span>: <span class="string">"cyan"</span> <span class="name">duration</span>: <span class="number">1000</span> } <span class="type"><a href="qml-qtquick-coloranimation.html">ColorAnimation</a></span> { <span class="name">from</span>: <span class="string">"cyan"</span> <span class="name">to</span>: <span class="string">"red"</span> <span class="name">duration</span>: <span class="number">1000</span> } } <span class="name">colorVariation</span>: <span class="number">0.2</span> } <span class="type"><a href="qml-qtquick-particles-attractor.html">Attractor</a></span> { <span class="name">id</span>: <span class="name">gs</span>; <span class="name">pointX</span>: <span class="name">root</span>.<span class="name">width</span><span class="operator">/</span><span class="number">2</span>; <span class="name">pointY</span>: <span class="name">root</span>.<span class="name">height</span><span class="operator">/</span><span class="number">2</span>; <span class="name">strength</span>: <span class="number">4000000</span>; <span class="name">affectedParameter</span>: <span class="name">Attractor</span>.<span class="name">Acceleration</span> <span class="name">proportionalToDistance</span>: <span class="name">Attractor</span>.<span class="name">InverseQuadratic</span> } <span class="type"><a href="qml-qtquick-particles-age.html">Age</a></span> { <span class="name">x</span>: <span class="name">gs</span>.<span class="name">pointX</span> <span class="operator">-</span> <span class="number">8</span>; <span class="name">y</span>: <span class="name">gs</span>.<span class="name">pointY</span> <span class="operator">-</span> <span class="number">8</span>; <span class="name">width</span>: <span class="number">16</span> <span class="name">height</span>: <span class="number">16</span> } <span class="type"><a href="qml-qtquick-rectangle.html">Rectangle</a></span> { <span class="name">color</span>: <span class="string">"black"</span> <span class="name">width</span>: <span class="number">8</span> <span class="name">height</span>: <span class="number">8</span> <span class="name">radius</span>: <span class="number">4</span> <span class="name">x</span>: <span class="name">gs</span>.<span class="name">pointX</span> <span class="operator">-</span> <span class="number">4</span> <span class="name">y</span>: <span class="name">gs</span>.<span class="name">pointY</span> <span class="operator">-</span> <span class="number">4</span> } <span class="type"><a href="qml-qtquick-image.html">Image</a></span> { <span class="name">source</span>:<span class="string">"../../images/rocket2.png"</span> <span class="name">id</span>: <span class="name">ship</span> <span class="name">width</span>: <span class="number">45</span> <span class="name">height</span>: <span class="number">22</span> <span class="comment">//Automatic movement</span> SequentialAnimation on <span class="name">x</span> { <span class="name">loops</span>: -<span class="number">1</span> <span class="type"><a href="qml-qtquick-numberanimation.html">NumberAnimation</a></span>{<span class="name">to</span>: <span class="name">root</span>.<span class="name">width</span><span class="operator">-</span><span class="number">45</span>; <span class="name">easing</span>.type: <span class="name">Easing</span>.<span class="name">InOutQuad</span>; <span class="name">duration</span>: <span class="number">2000</span>} <span class="type"><a href="qml-qtquick-numberanimation.html">NumberAnimation</a></span>{<span class="name">to</span>: <span class="number">0</span>; <span class="name">easing</span>.type: <span class="name">Easing</span>.<span class="name">OutInQuad</span>; <span class="name">duration</span>: <span class="number">6000</span>} } SequentialAnimation on <span class="name">y</span> { <span class="name">loops</span>: -<span class="number">1</span> <span class="type"><a href="qml-qtquick-numberanimation.html">NumberAnimation</a></span>{<span class="name">to</span>: <span class="name">root</span>.<span class="name">height</span><span class="operator">-</span><span class="number">22</span>; <span class="name">easing</span>.type: <span class="name">Easing</span>.<span class="name">OutInQuad</span>; <span class="name">duration</span>: <span class="number">6000</span>} <span class="type"><a href="qml-qtquick-numberanimation.html">NumberAnimation</a></span>{<span class="name">to</span>: <span class="number">0</span>; <span class="name">easing</span>.type: <span class="name">Easing</span>.<span class="name">InOutQuad</span>; <span class="name">duration</span>: <span class="number">2000</span>} } } <span class="type"><a href="qml-qtquick-particles-emitter.html">Emitter</a></span> { <span class="name">group</span>: <span class="string">"engine"</span> <span class="name">emitRate</span>: <span class="number">200</span> <span class="name">lifeSpan</span>: <span class="number">1000</span> <span class="name">size</span>: <span class="number">10</span> <span class="name">endSize</span>: <span class="number">4</span> <span class="name">sizeVariation</span>: <span class="number">4</span> <span class="name">velocity</span>: <span class="name">PointDirection</span> { <span class="name">x</span>: -<span class="number">128</span>; <span class="name">xVariation</span>: <span class="number">32</span> } <span class="name">height</span>: <span class="name">ship</span>.<span class="name">height</span> <span class="name">y</span>: <span class="name">ship</span>.<span class="name">y</span> <span class="name">x</span>: <span class="name">ship</span>.<span class="name">x</span> <span class="name">width</span>: <span class="number">20</span> } <span class="type"><a href="qml-qtquick-particles-emitter.html">Emitter</a></span> { <span class="name">group</span>: <span class="string">"shot"</span> <span class="name">emitRate</span>: <span class="number">32</span> <span class="name">lifeSpan</span>: <span class="number">1000</span> <span class="name">enabled</span>: <span class="number">true</span> <span class="name">size</span>: <span class="number">40</span> <span class="name">velocity</span>: <span class="name">PointDirection</span> { <span class="name">x</span>: <span class="number">256</span>; } <span class="name">x</span>: <span class="name">ship</span>.<span class="name">x</span> <span class="operator">+</span> <span class="name">ship</span>.<span class="name">width</span> <span class="name">y</span>: <span class="name">ship</span>.<span class="name">y</span> <span class="operator">+</span> <span class="name">ship</span>.<span class="name">height</span><span class="operator">/</span><span class="number">2</span> } } } </pre> </div> <!-- @@@particles/affectors/content/attractor.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>