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<h1 class="title">blurparticles.qml Example File</h1>
<span class="subtitle">particles/customparticle/content/blurparticles.qml</span>
<!-- $$$particles/customparticle/content/blurparticles.qml-description -->
<div class="descr"> <a name="details"></a>
<pre class="qml"><span class="comment">/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** &quot;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
** &quot;AS IS&quot; 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.&quot;
**
** $QT_END_LICENSE$
**
****************************************************************************/</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">color</span>: <span class="string">&quot;white&quot;</span>
    <span class="name">width</span>: <span class="number">240</span>
    <span class="name">height</span>: <span class="number">360</span>
    <span class="type"><a href="qml-qtquick-particles-particlesystem.html">ParticleSystem</a></span> {
        <span class="name">id</span>: <span class="name">sys</span>
    }
    <span class="type"><a href="qml-qtquick-particles-emitter.html">Emitter</a></span> {
        <span class="name">system</span>:<span class="name">sys</span>
        <span class="name">height</span>: <span class="name">parent</span>.<span class="name">height</span>
        <span class="name">emitRate</span>: <span class="number">1</span>
        <span class="name">lifeSpan</span>: <span class="number">12000</span>
        <span class="name">velocity</span>: <span class="name">PointDirection</span> {<span class="name">x</span>:<span class="number">20</span>;}
        <span class="name">size</span>: <span class="number">128</span>
    }
    <span class="type"><a href="qml-qtquick-shadereffectsource.html">ShaderEffectSource</a></span> {
        <span class="name">id</span>: <span class="name">theSource</span>
        <span class="name">sourceItem</span>: <span class="name">theItem</span>
        <span class="name">hideSource</span>: <span class="number">true</span>
    }
    <span class="type"><a href="qml-qtquick-image.html">Image</a></span> {
        <span class="name">id</span>: <span class="name">theItem</span>
        <span class="name">source</span>: <span class="string">&quot;../../images/starfish_1.png&quot;</span>
    }

    <span class="type"><a href="qml-qtquick-particles-customparticle.html">CustomParticle</a></span> {
        <span class="name">system</span>: <span class="name">sys</span>
        <span class="name">vertexShader</span>:<span class="string">&quot;
            uniform lowp float qt_Opacity;
            varying lowp float fFade;
            varying lowp float fBlur;

            void main() {
                defaultMain();
                highp float t = (qt_Timestamp - qt_ParticleData.x) / qt_ParticleData.y;
                highp float fadeIn = min(t * 10., 1.);
                highp float fadeOut = 1. - max(0., min((t - 0.75) * 4., 1.));

                fFade = fadeIn * fadeOut * qt_Opacity;
                fBlur = max(0.2 * t, t * qt_ParticleR);
            }
        &quot;</span>
        property <span class="type">variant</span> <span class="name">source</span>: <span class="name">theSource</span>
        property <span class="type">variant</span> <span class="name">blurred</span>: <span class="name">ShaderEffectSource</span> {
        <span class="name">sourceItem</span>: <span class="name">ShaderEffect</span> {
            <span class="name">width</span>: <span class="name">theItem</span>.<span class="name">width</span>
            <span class="name">height</span>: <span class="name">theItem</span>.<span class="name">height</span>
            property <span class="type">variant</span> <span class="name">delta</span>: <span class="name">Qt</span>.<span class="name">size</span>(<span class="number">0.0</span>, <span class="number">1.0</span> <span class="operator">/</span> <span class="name">height</span>)
            property <span class="type">variant</span> <span class="name">source</span>: <span class="name">ShaderEffectSource</span> {
                <span class="name">sourceItem</span>: <span class="name">ShaderEffect</span> {
                    <span class="name">width</span>: <span class="name">theItem</span>.<span class="name">width</span>
                    <span class="name">height</span>: <span class="name">theItem</span>.<span class="name">height</span>
                    property <span class="type">variant</span> <span class="name">delta</span>: <span class="name">Qt</span>.<span class="name">size</span>(<span class="number">1.0</span> <span class="operator">/</span> <span class="name">width</span>, <span class="number">0.0</span>)
                    property <span class="type">variant</span> <span class="name">source</span>: <span class="name">theSource</span>
                    <span class="name">fragmentShader</span>: <span class="string">&quot;
                        uniform sampler2D source;
                        uniform lowp float qt_Opacity;
                        uniform highp vec2 delta;
                        varying highp vec2 qt_TexCoord0;
                        void main() {
                            gl_FragColor =(0.0538 * texture2D(source, qt_TexCoord0 - 3.182 * delta)
                                         + 0.3229 * texture2D(source, qt_TexCoord0 - 1.364 * delta)
                                         + 0.2466 * texture2D(source, qt_TexCoord0)
                                         + 0.3229 * texture2D(source, qt_TexCoord0 + 1.364 * delta)
                                         + 0.0538 * texture2D(source, qt_TexCoord0 + 3.182 * delta)) * qt_Opacity;
                        }&quot;</span>
                }
            }
            <span class="name">fragmentShader</span>: <span class="string">&quot;
                uniform sampler2D source;
                uniform lowp float qt_Opacity;
                uniform highp vec2 delta;
                varying highp vec2 qt_TexCoord0;
                void main() {
                    gl_FragColor =(0.0538 * texture2D(source, qt_TexCoord0 - 3.182 * delta)
                                 + 0.3229 * texture2D(source, qt_TexCoord0 - 1.364 * delta)
                                 + 0.2466 * texture2D(source, qt_TexCoord0)
                                 + 0.3229 * texture2D(source, qt_TexCoord0 + 1.364 * delta)
                                 + 0.0538 * texture2D(source, qt_TexCoord0 + 3.182 * delta)) * qt_Opacity;
                }&quot;</span>
            }
        }
        <span class="name">fragmentShader</span>: <span class="string">&quot;
            uniform sampler2D source;
            uniform sampler2D blurred;
            varying highp vec2 qt_TexCoord0;
            varying highp float fBlur;
            varying highp float fFade;
            void main() {
                gl_FragColor = mix(texture2D(source, qt_TexCoord0), texture2D(blurred, qt_TexCoord0), min(1.0,fBlur*3.0)) * fFade;
            }&quot;</span>

    }
}</pre>
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