zdirtywork / Fixed_Unity-Bug-Report-Playable-IN-50605

[Fixed] According to Unity's Script Reference, "The frameId is incremented by `1` for every call to Playable.PrepareFrame." However, when manually evaluating a PlayableGraph, the frameId is incremented by `2` for every call to Playable.PrepareFrame.

[Fixed] Unity-Bug-Report-Playable-IN-50605

Fixed in 2023.3.0b5.

About this issue

When manually evaluating a PlayableGraph, the FrameData.frameId is not consecutive.

According to Unity's Script Reference, "The frameId is incremented by 1 for every call to Playable.PrepareFrame."

However, when manually evaluating a PlayableGraph, the frameId is incremented by 2 for every call to Playable.PrepareFrame.

Note:

• In the PlayableGraph::Evaluate method, the BumpFrameID method is called twice, causing this issue.
• https://docs.unity3d.com/ScriptReference/Playables.FrameData-frameId.html

How to reproduce

1. Open the "Sample" scene.
2. Enter Play mode.
3. Observe the content of the logged messages in the Console window.

Expected output: frameId - lastFrameId = 1.

Actual output: frameId - lastFrameId = 2.