- Qt 5.5
- Qt Quick
- Qt Quick Particles Examples - System
- timedgroupchanges.qml Example File
- Qt 5.5.1 Reference Documentation

# timedgroupchanges.qml Example File

particles/system/content/timedgroupchanges.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.
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    **     contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
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    **
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    ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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    import QtQuick 2.0
    import QtQuick.Particles 2.0

    Rectangle {
        width: 360
        height: 600
        color: "black"
        ParticleSystem {
            anchors.fill: parent
            id: syssy
            ParticleGroup {
                name: "fire"
                duration: 2000
                durationVariation: 2000
                to: {"splode":1}
            }
            ParticleGroup {
                name: "splode"
                duration: 400
                to: {"dead":1}
                TrailEmitter {
                    group: "works"
                    emitRatePerParticle: 100
                    lifeSpan: 1000
                    maximumEmitted: 1200
                    size: 8
                    velocity: AngleDirection {angle: 270; angleVariation: 45; magnitude: 20; magnitudeVariation: 20;}
                    acceleration: PointDirection {y:100; yVariation: 20}
                }
            }
            ParticleGroup {
                name: "dead"
                duration: 1000
                Affector {
                    once: true
                    onAffected: worksEmitter.burst(400,x,y)
                }
            }

            Timer {
                interval: 6000
                running: true
                triggeredOnStart: true
                repeat: true
                onTriggered:startingEmitter.pulse(100);
            }
            Emitter {
                id: startingEmitter
                group: "fire"
                width: parent.width
                y: parent.height
                enabled: false
                emitRate: 80
                lifeSpan: 6000
                velocity: PointDirection {y:-100;}
                size: 32
            }

            Emitter {
                id: worksEmitter
                group: "works"
                enabled: false
                emitRate: 100
                lifeSpan: 1600
                maximumEmitted: 6400
                size: 8
                velocity: CumulativeDirection {
                    PointDirection {y:-100}
                    AngleDirection {angleVariation: 360; magnitudeVariation: 80;}
                }
                acceleration: PointDirection {y:100; yVariation: 20}
            }

            ImageParticle {
                groups: ["works", "fire", "splode"]
                source: "qrc:///particleresources/glowdot.png"
                entryEffect: ImageParticle.Scale
            }
        }
    }