- Qt 5.3
- Qt Quick
- Qt Quick Particles Examples - Affectors
- turbulence.qml Example File
- Qt 5.3.2 Reference Documentation

# turbulence.qml Example File

particles/affectors/content/turbulence.qml

    /****************************************************************************
    **
    ** Copyright (C) 2013 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
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    **     of its contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
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    import QtQuick 2.0
    import QtQuick.Particles 2.0

    Rectangle {
        width: 320
        height: 480
        color: "#222222"
        id: root
        Image {
            source: "../../images/candle.png"
            anchors.bottom: parent.bottom
            anchors.horizontalCenter: parent.horizontalCenter
            anchors.bottomMargin: -60
            anchors.horizontalCenterOffset: 2
        }
        ParticleSystem {
            anchors.fill: parent
            MouseArea {
                anchors.fill: parent
                onClicked: turb.enabled = !turb.enabled
            }

            Turbulence {
                id: turb
                enabled: true
                height: (parent.height / 2) - 4
                width: parent.width
                x: parent. width / 4
                anchors.fill: parent
                strength: 32
                NumberAnimation on strength{from: 16; to: 64; easing.type: Easing.InOutBounce; duration: 1800; loops: -1}
            }

            ImageParticle {
                groups: ["smoke"]
                source: "qrc:///particleresources/glowdot.png"
                color: "#11111111"
                colorVariation: 0
            }
            ImageParticle {
                groups: ["flame"]
                source: "qrc:///particleresources/glowdot.png"
                color: "#11ff400f"
                colorVariation: 0.1
            }
            Emitter {
                anchors.centerIn: parent
                group: "flame"

                emitRate: 120
                lifeSpan: 1200
                size: 20
                endSize: 10
                sizeVariation: 10
                acceleration: PointDirection { y: -40 }
                velocity: AngleDirection { angle: 270; magnitude: 20; angleVariation: 22; magnitudeVariation: 5 }
            }
            TrailEmitter {
                id: smoke1
                width: root.width
                height: root.height/2
                group: "smoke"
                follow: "flame"

                emitRatePerParticle: 1
                lifeSpan: 2400
                lifeSpanVariation: 400
                size: 16
                endSize: 8
                sizeVariation: 8
                acceleration: PointDirection { y: -40 }
                velocity: AngleDirection { angle: 270; magnitude: 40; angleVariation: 22; magnitudeVariation: 5 }
            }
            TrailEmitter {
                id: smoke2
                width: root.width
                height: root.height/2 - 20
                group: "smoke"
                follow: "flame"

                emitRatePerParticle: 4
                lifeSpan: 2400
                size: 36
                endSize: 24
                sizeVariation: 12
                acceleration: PointDirection { y: -40 }
                velocity: AngleDirection { angle: 270; magnitude: 40; angleVariation: 22; magnitudeVariation: 5 }
            }
        }
    }