Chris Blackbourn
0079460dc7
Small roundoff errors during UV editing can sometimes occur, most likely due to so-called "catastrophic cancellation". Here we set a tolerance around zero when using Constrain-To-Bounds and UV Scaling. The tolerance is set at one quarter of a texel, on a 65536 x 65536 texture. TODO: If this fix holds, we should formalize the tolerance into the UV editing subsystem, perhaps as a helper function, and investigate where else it needs to be applied. Differential Revision: https://developer.blender.org/D16702