Softbody doesn't collide with some triangles in mesh since 5.5

[MattS]

You're right, that hints at deeper problems with the partition algorithm. I'll write new unit tests for the BIH and report back any additional modifications that result from that.

Thanks again!

For what it's worth, my current case boiled down to the following situation:



https://matthewsouth.s3-eu-west-1.amazonaws.com/PartitionIssueMesh.asset

The axis chosen to split on is X in this case because it spans the largest dimensions, but all the centres of the triangles on X are identical. It might need to consider the spread of the centres instead, I'm not sure.