dynamicemitters.qml Example File | Qt Quick 5.12.9

- Qt 5.12
- Qt Quick
- Qt Quick Particles Examples - System
- dynamicemitters.qml Example File
- Qt 5.12.9 Reference Documentation

# dynamicemitters.qml Example File

particles/system/content/dynamicemitters.qml

     /****************************************************************************
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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
         color: "black"
         width: 640
         height: 480
         ParticleSystem {
             id: sys
         }
         ImageParticle {
             system: sys
             source: "qrc:///particleresources/glowdot.png"
             color: "white"
             colorVariation: 1.0
             alpha: 0.1
         }

         Component {
             id: emitterComp
             Emitter {
                 id: container
                 Emitter {
                     id: emitMore
                     system: sys
                     emitRate: 128
                     lifeSpan: 600
                     size: 16
                     endSize: 8
                     velocity: AngleDirection {angleVariation:360; magnitude: 60}
                 }

                 property int life: 2600
                 property real targetX: 0
                 property real targetY: 0
                 function go() {
                     xAnim.start();
                     yAnim.start();
                     container.enabled = true
                 }
                 system: sys
                 emitRate: 32
                 lifeSpan: 600
                 size: 24
                 endSize: 8
                 NumberAnimation on x {
                     id: xAnim;
                     to: targetX
                     duration: life
                     running: false
                 }
                 NumberAnimation on y {
                     id: yAnim;
                     to: targetY
                     duration: life
                     running: false
                 }
                 Timer {
                     interval: life
                     running: true
                     onTriggered: container.destroy();
                 }
             }
         }

         function customEmit(x,y) {
             for (var i=0; i<8; i++) {
                 var obj = emitterComp.createObject(root);
                 obj.x = x
                 obj.y = y
                 obj.targetX = Math.random() * 240 - 120 + obj.x
                 obj.targetY = Math.random() * 240 - 120 + obj.y
                 obj.life = Math.round(Math.random() * 2400) + 200
                 obj.emitRate = Math.round(Math.random() * 32) + 32
                 obj.go();
             }
         }

         Timer {
             interval: 10000
             triggeredOnStart: true
             running: true
             repeat: true
             onTriggered: customEmit(Math.random() * 320, Math.random() * 480)
         }
         MouseArea {
             anchors.fill: parent
             onClicked: customEmit(mouse.x, mouse.y);
         }

         Text {
             anchors.horizontalCenter: parent.horizontalCenter
             text: "Click Somewhere"
             color: "white"
             font.pixelSize: 24
         }
     }