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2019.3 and PlayableBehaviour::ProcessFrame

Discussion in 'Timeline' started by seant_unity, Jun 25, 2019.

  1. seant_unity


    Unity Technologies

    Aug 25, 2015
    In 2019.3 we have made a fix to ScriptPlayables that could potentially affect your custom tracks in Timeline.

    ScriptPlayableOutputs have been changed from a pre-order to post-order traversal. That means that ProcessFrame on PlayableBehaviours generated from clips/PlayableAsset will now get called before ProcessFrame on PlayableBehaviours generated from TrackAsset/GetTrackMixer().

    PrepareFrame remains unchanged. If you require the old ordering (track, then clips) then use PrepareFrame instead.

    I hope this is a welcome change. Our intention was to always have ProcessFrame work this way, as it supports a data flow of clips to tracks to bindings.