customemitter.qml Example File

particles/emitters/content/customemitter.qml
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import QtQuick 2.0 import QtQuick.Particles 2.0 ParticleSystem { id: sys width: 360 height: 600 running: true Rectangle { z: -1 anchors.fill: parent color: "black" } property real petalLength: 180 property real petalRotation: 0 NumberAnimation on petalRotation { from: 0; to: 360; loops: -1; running: true duration: 24000 } function convert(a) {return a*(Math.PI/180);} Emitter { lifeSpan: 4000 emitRate: 120 size: 12 anchors.centerIn: parent onEmitParticles: { for (var i=0; i<particles.length; i++) { var particle = particles[i]; particle.startSize = Math.max(02,Math.min(492,Math.tan(particle.t/2)*24)); var theta = Math.floor(Math.random() * 6.0); particle.red = theta == 0 || theta == 1 || theta == 2 ? 0.2 : 1; particle.green = theta == 2 || theta == 3 || theta == 4 ? 0.2 : 1; particle.blue = theta == 4 || theta == 5 || theta == 0 ? 0.2 : 1; theta /= 6.0; theta *= 2.0*Math.PI; theta += sys.convert(sys.petalRotation);//Convert from degrees to radians particle.initialVX = petalLength * Math.cos(theta); particle.initialVY = petalLength * Math.sin(theta); particle.initialAX = particle.initialVX * -0.5; particle.initialAY = particle.initialVY * -0.5; } } } ImageParticle { source: "qrc:///particleresources/fuzzydot.png" alpha: 0.0 } }