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  1. Qt
  2. QTBUG-30915

Easing an emitRate from 0 results in no particles on screen

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      The following example results in no particles, at least on OS X. However if you shorten the duration on the NumberAnimation to 100 ms then it works. Also if this NumberAnimation has no easing curve it will start showing the particles.

      import QtQuick 2.0
import QtQuick.Particles 2.0

Rectangle {
    width: 400
    height: 400
    color: "black"


    ParticleSystem {
        id: ps
        anchors.fill: parent

        ImageParticle {
            id: logoParticle
            source: "images/particle.png"
            color: "white"
            anchors.fill: parent
        }

        Emitter {
            id: pe
            anchors.fill: parent
            emitRate: 0
            lifeSpan: 750
            size: 10
            endSize: 2
            sizeVariation: 80
            velocity: AngleDirection {angleVariation: 180; magnitude: 50}
        }
        
    }

    SequentialAnimation {
        running: true
        NumberAnimation { target: pe; property: "emitRate"; to: 1000; duration: 1000; easing.type: Easing.InSine }
    }

}

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            aalpert Alan Alpert
            designker Nigel Hietala
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              Created:
              Updated:
              Resolved:

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