[Bf-committers] Sculpt optimizations

[Nicholas Bishop]

Info on the sculpt tool optimizations:

With Brecht's help, sculpt mode is getting a nice speed boost. The
work so far breaks all sorts of things, but sculpt performance is just
vastly better than what 2.5 has now.

Basically the patch adds a coarse BVH for sculpt mode. The BVH is used
for finding where the sculpt brush is (so no more copying the OpenGL
depth buffer!), for finding vertices within the brush area, and for
partial redrawing. This gets rid of the nasty linear performance (in
relation to number of verts) that sculpt previously had.

Here's a patch against trunk to play with:
https://projects.blender.org/tracker/index.php?func=detail&aid=19672&group_id=9&atid=127

-Nicholas