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<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>
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<!-- @@@particles/affectors/content/customaffector.qml -->
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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
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