velocityfrommotion.qml Example File

particles/emitters/content/velocityfrommotion.qml
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 import QtQuick 2.0
 import QtQuick.Particles 2.0

 Rectangle {

     id: root

     height: 540
     width: 360

     gradient: Gradient {
         GradientStop { position: 0; color: "#000020" }
         GradientStop { position: 1; color: "#000000" }
     }

     MouseArea {
         id: mouseArea
         anchors.fill: root
     }

     ParticleSystem { id: sys1 }
     ImageParticle {
         system: sys1
         source: "qrc:///particleresources/glowdot.png"
         color: "cyan"
         alpha: 0
         SequentialAnimation on color {
             loops: Animation.Infinite
             ColorAnimation {
                 from: "cyan"
                 to: "magenta"
                 duration: 1000
             }
             ColorAnimation {
                 from: "magenta"
                 to: "blue"
                 duration: 2000
             }
             ColorAnimation {
                 from: "blue"
                 to: "violet"
                 duration: 2000
             }
             ColorAnimation {
                 from: "violet"
                 to: "cyan"
                 duration: 2000
             }
         }
         colorVariation: 0.3
     }
     Emitter {
         id: trailsNormal
         system: sys1

         emitRate: 500
         lifeSpan: 2000

         y: mouseArea.pressed ? mouseArea.mouseY : circle.cy
         x: mouseArea.pressed ? mouseArea.mouseX : circle.cx

         velocity: PointDirection {xVariation: 4; yVariation: 4;}
         acceleration: PointDirection {xVariation: 10; yVariation: 10;}
         velocityFromMovement: 8

         size: 8
         sizeVariation: 4
     }
     ParticleSystem { id: sys2 }
     ImageParticle {
         color: "cyan"
         system: sys2
         alpha: 0
         SequentialAnimation on color {
             loops: Animation.Infinite
             ColorAnimation {
                 from: "magenta"
                 to: "cyan"
                 duration: 1000
             }
             ColorAnimation {
                 from: "cyan"
                 to: "magenta"
                 duration: 2000
             }
         }
         colorVariation: 0.5
         source: "qrc:///particleresources/star.png"
     }
     Emitter {
         id: trailsStars
         system: sys2

         emitRate: 100
         lifeSpan: 2200

         y: mouseArea.pressed ? mouseArea.mouseY : circle.cy
         x: mouseArea.pressed ? mouseArea.mouseX : circle.cx

         velocity: PointDirection {xVariation: 4; yVariation: 4;}
         acceleration: PointDirection {xVariation: 10; yVariation: 10;}
         velocityFromMovement: 8

         size: 22
         sizeVariation: 4
     }
     ParticleSystem { id: sys3; }
     ImageParticle {
         source: "qrc:///particleresources/glowdot.png"
         system: sys3
         color: "orange"
         alpha: 0
         SequentialAnimation on color {
             loops: Animation.Infinite
             ColorAnimation {
                 from: "red"
                 to: "green"
                 duration: 2000
             }
             ColorAnimation {
                 from: "green"
                 to: "red"
                 duration: 2000
             }
         }

         colorVariation: 0.2

     }
     Emitter {
         id: trailsNormal2
         system: sys3

         emitRate: 300
         lifeSpan: 2000

         y: mouseArea.pressed ? mouseArea.mouseY : circle2.cy
         x: mouseArea.pressed ? mouseArea.mouseX : circle2.cx

         velocityFromMovement: 16

         velocity: PointDirection {xVariation: 4; yVariation: 4;}
         acceleration: PointDirection {xVariation: 10; yVariation: 10;}

         size: 12
         sizeVariation: 4
     }
     ParticleSystem { id: sys4; }
     ImageParticle {
         system: sys4
         source: "qrc:///particleresources/star.png"
         color: "green"
         alpha: 0
         SequentialAnimation on color {
             loops: Animation.Infinite
             ColorAnimation {
                 from: "green"
                 to: "red"
                 duration: 2000
             }
             ColorAnimation {
                 from: "red"
                 to: "green"
                 duration: 2000
             }
         }

         colorVariation: 0.5
     }
     Emitter {
         id: trailsStars2
         system: sys4

         emitRate: 50
         lifeSpan: 2200

         y: mouseArea.pressed ? mouseArea.mouseY : circle2.cy
         x: mouseArea.pressed ? mouseArea.mouseX : circle2.cx

         velocityFromMovement: 16
         velocity: PointDirection {xVariation: 2; yVariation: 2;}
         acceleration: PointDirection {xVariation: 10; yVariation: 10;}

         size: 22
         sizeVariation: 4
     }

     color: "white"

     Item {
         id: circle
         //anchors.fill: parent
         property real radius: 0
         property real dx: root.width / 2
         property real dy: root.height / 2
         property real cx: radius * Math.sin(percent*6.283185307179) + dx
         property real cy: radius * Math.cos(percent*6.283185307179) + dy
         property real percent: 0

         SequentialAnimation on percent {
             loops: Animation.Infinite
             running: true
             NumberAnimation {
             duration: 1000
             from: 1
             to: 0
             loops: 8
             }
             NumberAnimation {
             duration: 1000
             from: 0
             to: 1
             loops: 8
             }

         }

         SequentialAnimation on radius {
             loops: Animation.Infinite
             running: true
             NumberAnimation {
                 duration: 4000
                 from: 0
                 to: 100
             }
             NumberAnimation {
                 duration: 4000
                 from: 100
                 to: 0
             }
         }
     }

     Item {
         id: circle3
         property real radius: 100
         property real dx: root.width / 2
         property real dy: root.height / 2
         property real cx: radius * Math.sin(percent*6.283185307179) + dx
         property real cy: radius * Math.cos(percent*6.283185307179) + dy
         property real percent: 0

         SequentialAnimation on percent {
             loops: Animation.Infinite
             running: true
             NumberAnimation { from: 0.0; to: 1 ; duration: 10000;  }
         }
     }

     Item {
         id: circle2
         property real radius: 30
         property real dx: circle3.cx
         property real dy: circle3.cy
         property real cx: radius * Math.sin(percent*6.283185307179) + dx
         property real cy: radius * Math.cos(percent*6.283185307179) + dy
         property real percent: 0

         SequentialAnimation on percent {
             loops: Animation.Infinite
             running: true
             NumberAnimation { from: 0.0; to: 1 ; duration: 1000; }
         }
     }

 }