I build the unlimited clay modifier based on the EditMeshDerivedMesh
type (emDM) I have added the emDM_getPBVH() function to the definition
of that derived mesh type in a similar way like other types like
cdDM_getPBVH() and ccgDM_getPBVH() but I have noted that while the other
functions are called once per stroke the emDM_getPBVH() is called lots
of time per stroke!!! as many times as steps have the stroke O.o!
since those are callbacks I could not track them very well in the code
to find out the cause... did you have any clue?
the building of the pbvh structure is relatively expensive so if I
reduce the calls I could speed up the code to some factor.
thanks in advance Farsthary
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