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

# groupgoal.qml Example File

particles/affectors/content/groupgoal.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
    ** met:
    **   * Redistributions of source code must retain the above copyright
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    **     notice, this list of conditions and the following disclaimer in
    **     the documentation and/or other materials provided with the
    **     distribution.
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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 {
        id: root
        width: 360
        height: 600
        color: "black"

        property int score: 0
        Text {
            color: "white"
            anchors.right: parent.right
            text: score
        }

        ParticleSystem {
            id: particles
            anchors.fill: parent
            // ![unlit]
            ParticleGroup {
                name: "unlit"
                duration: 1000
                to: {"lighting":1, "unlit":99}
                ImageParticle {
                    source: "../../images/particleA.png"
                    colorVariation: 0.1
                    color: "#2060160f"
                }
                GroupGoal {
                    whenCollidingWith: ["lit"]
                    goalState: "lighting"
                    jump: true
                }
            }
            // ![unlit]
            // ![lighting]
            ParticleGroup {
                name: "lighting"
                duration: 100
                to: {"lit":1}
            }
            // ![lighting]
            // ![lit]
            ParticleGroup {
                name: "lit"
                duration: 10000
                onEntered: score++;
                TrailEmitter {
                    id: fireballFlame
                    group: "flame"

                    emitRatePerParticle: 48
                    lifeSpan: 200
                    emitWidth: 8
                    emitHeight: 8

                    size: 24
                    sizeVariation: 8
                    endSize: 4
                }

                TrailEmitter {
                    id: fireballSmoke
                    group: "smoke"
            // ![lit]

                    emitRatePerParticle: 120
                    lifeSpan: 2000
                    emitWidth: 16
                    emitHeight: 16

                    velocity: PointDirection {yVariation: 16; xVariation: 16}
                    acceleration: PointDirection {y: -16}

                    size: 24
                    sizeVariation: 8
                    endSize: 8
                }
            }

            ImageParticle {
                id: smoke
                anchors.fill: parent
                groups: ["smoke"]
                source: "qrc:///particleresources/glowdot.png"
                colorVariation: 0
                color: "#00111111"
            }
            ImageParticle {
                id: pilot
                anchors.fill: parent
                groups: ["pilot"]
                source: "qrc:///particleresources/glowdot.png"
                redVariation: 0.01
                blueVariation: 0.4
                color: "#0010004f"
            }
            ImageParticle {
                id: flame
                anchors.fill: parent
                groups: ["flame", "lit", "lighting"]
                source: "../../images/particleA.png"
                colorVariation: 0.1
                color: "#00ff400f"
            }

            Emitter {
                height: parent.height/2
                emitRate: 4
                lifeSpan: 4000//TODO: Infinite & kill zone
                size: 24
                sizeVariation: 4
                velocity: PointDirection {x:120; xVariation: 80; yVariation: 50}
                acceleration: PointDirection {y:120}
                group: "unlit"
            }

            Emitter {
                id: flamer
                x: 100
                y: 300
                group: "pilot"
                emitRate: 80
                lifeSpan: 600
                size: 24
                sizeVariation: 2
                endSize: 0
                velocity: PointDirection { y:-100; yVariation: 4; xVariation: 4 }
                // ![groupgoal-pilot]
                GroupGoal {
                    groups: ["unlit"]
                    goalState: "lit"
                    jump: true
                    system: particles
                    x: -15
                    y: -55
                    height: 75
                    width: 30
                    shape: MaskShape {source: "../../images/matchmask.png"}
                }
                // ![groupgoal-pilot]
            }
            // ![groupgoal-ma]
            //Click to enflame
            GroupGoal {
                groups: ["unlit"]
                goalState: "lighting"
                jump: true
                enabled: ma.pressed
                width: 18
                height: 18
                x: ma.mouseX - width/2
                y: ma.mouseY - height/2
            }
            // ![groupgoal-ma]
            MouseArea {
                id: ma
                anchors.fill: parent
            }
        }
    }