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Issue ID




AnimationCurve.Evaluate() makes glitchy animation when used with System.Threading.Tasks.Parallel.For()




Priority: 7Not yet prioritized for a release


Severity: 3Secondary functionality broken

How to reproduce:
1. Download, extract and open user's attached project (New Unity
2. Open 'Scene'
3. Select 'NoiseViewer' object in the Hierarchy and in the 'Noise (Script)' component, change Scale to 50 to see the issue more clearly
4. Enter Play mode
5. Move around the X coordinate in the same component to see the issue

Expected result: Animation displays normally
Actual result: Glitchy green lines are appearing over the animation

Reproduced with: 2018.3.3f1, 2019.1.0a14, 2019.2.0a1

Response avatar

Resolution Note:

AnimationCurve implementation is not thread safe. It uses a cache internally to speed up calculation and this will not behave properly when called concurrently. While you may evaluate a curve in a thread, you may not evaluate the same curve in multiple threads.

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