imagecolors.qml Example File

particles/customparticle/content/imagecolors.qml
/****************************************************************************
**
** 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:
**
** "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 {
    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: "qrc:///particleresources/fuzzydot.png"
            }
            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();
                }
            "
            property variant particleTexture: particleSource
            property variant pictureTexture: pictureSource
            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;
            }"
        }

        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);
        }
    }
}

© 2016 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. 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.