examples/declarative/particles/asteroid/blackhole.qml

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  40
  41 import QtQuick 2.0
  42 import QtQuick.Particles 2.0
  43
  44 Rectangle{
  45     id: root
  46     width: 360
  47     height: 540
  48     color: "black"
  49     property bool spacePressed: false
  50     focus: true
  51     Image{
  52         source: "content/finalfrontier.png"
  53         anchors.centerIn:parent
  54     }
  55     Keys.onPressed: {
  56         if (event.key == Qt.Key_Space) {
  57             spacePressed = true;
  58             event.accepted = true;
  59         }
  60     }
  61     Keys.onReleased: {
  62         if (event.key == Qt.Key_Space) {
  63             spacePressed = false;
  64             event.accepted = true;
  65         }
  66     }
  67
  68     Emitter{
  69         particle: "stars"
  70         system: particles
  71         particlesPerSecond: 40
  72         particleDuration: 4000
  73         emitting: true
  74         particleSize: 30
  75         particleSizeVariation: 10
  76         speed: PointDirection{ x: 220; xVariation: 40 }
  77         height: parent.height
  78     }
  79     Emitter{
  80         particle: "roids"
  81         system: particles
  82         particlesPerSecond: 10
  83         particleDuration: 4000
  84         emitting: true
  85         particleSize: 30
  86         particleSizeVariation: 10
  87         speed: PointDirection{ x: 220; xVariation: 40 }
  88         height: parent.height
  89     }
  90     ParticleSystem{
  91         id: particles
  92         anchors.fill: parent
  93     }
  94     ImageParticle{
  95         id: stars
  96         particles: ["stars"]
  97         system: particles
  98         image: "content/star.png"
  99         color: "white"
 100         colorVariation: 0.1
 101         alpha: 0
 102     }
 103     ImageParticle{
 104         id: roids
 105         particles: ["roids"]
 106         system: particles
 107         sprites: Sprite{
 108             id: spinState
 109             name: "spinning"
 110             source: "content/meteor.png"
 111             frames: 35
 112             duration: 60
 113             speedModifiesDuration: -0.1
 114         }
 115     }
 116     ImageParticle{
 117         id: shot
 118         particles: ["shot"]
 119         system: particles
 120         image: "content/star.png"
 121
 122         color: "#0FF06600"
 123         colorVariation: 0.3
 124     }
 125     ImageParticle{
 126         id: engine
 127         particles: ["engine"]
 128         system: particles
 129         image: "content/particle4.png"
 130
 131         color: "orange"
 132         SequentialAnimation on color {
 133             loops: Animation.Infinite
 134             ColorAnimation {
 135                 from: "red"
 136                 to: "cyan"
 137                 duration: 1000
 138             }
 139             ColorAnimation {
 140                 from: "cyan"
 141                 to: "red"
 142                 duration: 1000
 143             }
 144         }
 145
 146         colorVariation: 0.2
 147     }
 148     PointAttractor{
 149         id: gs; x: root.width/2; y: root.height/2; strength: 4000000;
 150         system: particles
 151         physics: PointAttractor.Acceleration
 152         proportionalToDistance: PointAttractor.Quadratic
 153     }
 154     Kill{
 155         system: particles
 156         x: gs.x - 8;
 157         y: gs.y - 8;
 158         width: 16
 159         height: 16
 160     }
 161     Image{
 162         source:"content/rocket2.png"
 163         id: ship
 164         width: 45
 165         height: 22
 166         MouseArea{
 167             id: ma
 168             anchors.fill: parent;
 169             drag.axis: Drag.XandYAxis
 170             drag.target: ship
 171         }
 172         Emitter{
 173             particle: "engine"
 174             system: particles
 175             particlesPerSecond: 200
 176             particleDuration: 1000
 177             emitting: true
 178             particleSize: 10
 179             particleEndSize: 4
 180             particleSizeVariation: 4
 181             speed: PointDirection{ x: -128; xVariation: 32 }
 182             height: parent.height
 183             width: 20
 184         }
 185         Emitter{
 186             particle: "shot"
 187             system: particles
 188             particlesPerSecond: 32
 189             particleDuration: 2000
 190             emitting: spacePressed
 191             particleSize: 40
 192             speed: PointDirection{ x: 256; }
 193             x: parent.width
 194             y: parent.height/2
 195         }
 196     }
 197     Text{
 198         color: "white"
 199         anchors.bottom: parent.bottom
 200         text:"Drag the ship, Spacebar to fire."
 201     }
 202 }
 203