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Particles won't spawn over time

  • Hi Nui Lauridsen,

    So you don't want the particles to spawn immediately, you want them to be time based? 

    You could use a script like this and change the Billboard for effects or another camera:


    //---JS Code---

    //---Take a Billboard and disable it after a certain amount of time

    // @input Component.SpriteVisual Billboard

    // @input float time

    script.Billboard.enabled = true;

    var delayedEvent = script.createEvent("DelayedCallbackEvent");



    script.Billboard.enabled = false;




    ------------ Project Code-------------

    // ExternalTimeController.js

    // Version: 0.0.1

    // Event: Lens Initialized

    // Description: Allows a particle to be controlled by device time for start and stop simulation

    function update()


    global.animTime = global.controlTime - getTime();

    var positiveTime = -animTime * 0.5;

    if(positiveTime > 1.01)


    if(script.getSceneObject().getComponentCount("Component.MeshVisual") > 0)


    var meshVis = script.getSceneObject().getFirstComponent("Component.MeshVisual");

    if(meshVis.getMaterialsCount() > 0)


    meshVis.getMaterial(0).mainPass.externalTimeInput = positiveTime-0.01;






    var updateEvent = script.createEvent("UpdateEvent");


    function resetTime(time)


    if(global.animTime * 0.5 <= -15.0)


    global.controlTime = getTime();




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  • Hi, Nui Lauridsen! 

    We are going to look into the external time issue. 

    For now you can use

    meshVis.mainPass.spawnMaxParticles = maxCount to start particles and
    meshVis.mainPass.spawnMaxParticles = 0 to stop them.
    If you need a smooth start and stop please take a look at project attached. It lerps particle count over time.
    Hope it helps!
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  • Thank you guys, this will do!

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