velocityfrommotion.qml Example File | Qt Quick 5.12.10

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- Qt Quick Particles Examples - Emitters
- velocityfrommotion.qml Example File
- Qt 5.12.10 Reference Documentation

# velocityfrommotion.qml Example File

particles/emitters/content/velocityfrommotion.qml

     /****************************************************************************
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     ** Contact: https://www.qt.io/licensing/
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     ** This file is part of the examples of the Qt Toolkit.
     **
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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; }
             }
         }

     }