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Alexander Gavrilov dca32f2b4f Fluid Particles: fix threading crash with viscoelastic springs. ...

As correctly pointed out by a comment in the code, adding
new springs wasn't thread safe, and caused crashes.

Fix by buffering new springs in intermediate thread-local
arrays, which are flushed on the main thread. This is valid
because the new springs are not used until the next sim step.

Differential Revision: https://developer.blender.org/D6133

2019-11-09 13:44:43 +03:00

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