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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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:
**
** "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 Digia Plc and its Subsidiary(-ies) 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 {
width: 400
height: 400
Rectangle {
id: root
color: "white"
width: 310
height: 300
anchors.centerIn: parent
ParticleSystem { id: sys }
CustomParticle {
system: sys
property real maxWidth: root.width
property real maxHeight: root.height
ShaderEffectSource {
id: pictureSource
sourceItem: picture
hideSource: true
}
Image {
id: picture
source: "../../images/starfish_3.png"
}
ShaderEffectSource {
id: particleSource
sourceItem: particle
hideSource: true
}
Image {
id: particle
source: "../../images/particle4.png"
}
//! [vertex]
vertexShader:"
uniform highp float maxWidth;
uniform highp float maxHeight;
varying highp vec2 fTex2;
varying lowp float fFade;
uniform lowp float qt_Opacity;
void main() {
fTex2 = vec2(qt_ParticlePos.x, qt_ParticlePos.y);
//Uncomment this next line for each particle to use full texture, instead of the solid color at the center of the particle.
//fTex2 = fTex2 + ((- qt_ParticleData.z / 2. + qt_ParticleData.z) * qt_ParticleTex); //Adjusts size so it's like a chunk of image.
fTex2 = fTex2 / vec2(maxWidth, maxHeight);
highp float t = (qt_Timestamp - qt_ParticleData.x) / qt_ParticleData.y;
fFade = min(t*4., (1.-t*t)*.75) * qt_Opacity;
defaultMain();
}
"
//! [vertex]
property variant particleTexture: particleSource
property variant pictureTexture: pictureSource
//! [fragment]
fragmentShader: "
uniform sampler2D particleTexture;
uniform sampler2D pictureTexture;
varying highp vec2 qt_TexCoord0;
varying highp vec2 fTex2;
varying lowp float fFade;
void main() {
gl_FragColor = texture2D(pictureTexture, fTex2) * texture2D(particleTexture, qt_TexCoord0).w * fFade;
}"
//! [fragment]
}
Emitter {
id: emitter
system: sys
enabled: false
lifeSpan: 8000
maximumEmitted: 4000
anchors.fill: parent
size: 16
acceleration: PointDirection { xVariation: 12; yVariation: 12 }
}
MouseArea {
anchors.fill: parent
onClicked: emitter.burst(4000);
}
}
}
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