<?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 5.12.6</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="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"><a href="qtquick-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">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"> /**************************************************************************** ** ** 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." ** ** $QT_END_LICENSE$ ** ****************************************************************************/ import QtQuick 2.0 import QtQuick.Particles 2.0 Rectangle { id: root width: 360 height: 540 color: "black" Image { source: "../../images/finalfrontier.png" anchors.centerIn:parent } ParticleSystem { id: particles anchors.fill: parent Emitter { group: "stars" emitRate: 40 lifeSpan: 4000 enabled: true size: 30 sizeVariation: 10 velocity: PointDirection { x: 220; xVariation: 40 } height: parent.height } Emitter { group: "roids" emitRate: 10 lifeSpan: 4000 enabled: true size: 30 sizeVariation: 10 velocity: PointDirection { x: 220; xVariation: 40 } height: parent.height } ImageParticle { id: stars groups: ["stars"] source: "qrc:///particleresources/star.png" color: "white" colorVariation: 0.1 alpha: 0 } ImageParticle { id: roids groups: ["roids"] sprites: Sprite { id: spinState name: "spinning" source: "../../images/meteor.png" frameCount: 35 frameDuration: 60 } } ImageParticle { id: shot groups: ["shot"] source: "qrc:///particleresources/star.png" color: "#0FF06600" colorVariation: 0.3 } ImageParticle { id: engine groups: ["engine"] source: "qrc:///particleresources/fuzzydot.png" color: "orange" SequentialAnimation on color { loops: Animation.Infinite ColorAnimation { from: "red" to: "cyan" duration: 1000 } ColorAnimation { from: "cyan" to: "red" duration: 1000 } } colorVariation: 0.2 } Attractor { id: gs; pointX: root.width/2; pointY: root.height/2; strength: 4000000; affectedParameter: Attractor.Acceleration proportionalToDistance: Attractor.InverseQuadratic } Age { x: gs.pointX - 8; y: gs.pointY - 8; width: 16 height: 16 } Rectangle { color: "black" width: 8 height: 8 radius: 4 x: gs.pointX - 4 y: gs.pointY - 4 } Image { source:"../../images/rocket2.png" id: ship width: 45 height: 22 //Automatic movement SequentialAnimation on x { loops: -1 NumberAnimation{to: root.width-45; easing.type: Easing.InOutQuad; duration: 2000} NumberAnimation{to: 0; easing.type: Easing.OutInQuad; duration: 6000} } SequentialAnimation on y { loops: -1 NumberAnimation{to: root.height-22; easing.type: Easing.OutInQuad; duration: 6000} NumberAnimation{to: 0; easing.type: Easing.InOutQuad; duration: 2000} } } Emitter { group: "engine" emitRate: 200 lifeSpan: 1000 size: 10 endSize: 4 sizeVariation: 4 velocity: PointDirection { x: -128; xVariation: 32 } height: ship.height y: ship.y x: ship.x width: 20 } Emitter { group: "shot" emitRate: 32 lifeSpan: 1000 enabled: true size: 40 velocity: PointDirection { x: 256; } x: ship.x + ship.width y: ship.y + ship.height/2 } } } </pre> </div> <!-- @@@particles/affectors/content/attractor.qml --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. 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