Blender Git Commit Log

Git Commits -> Revision 1eacbf4

Revision 1eacbf4 by Sergey Sharybin (master)
July 7, 2016, 15:25 (GMT)
Cycles: Support visibility check for inner nodes of QBVH

It was initially unsupported because initial idea of checking visibility
of all children was slowing scenes down a lot. Now the idea has changed
and we only perform visibility check of current node. This avoids huge
slowdown (from tests here it seems to be withing 1-2%, but more tests
would never hurt) and gives nice speedup of ray traversal for complex
scenes which utilized ray visibility.

Here's timing of koro.blend:

Without visibility check With visibility check
Original file 4min 20sec 4min 23sec
Camera rays only 1min 43 sec 55sec

Unfortunately, this doesn't come for free and requires extra data in
BVH node, which increases memory usage of BVH nodes by 15%. This we
can solve with some future trickery of avoiding __tri_storage created
for curve segments.

Commit Details:

Full Hash: 1eacbf47e3cdf009b27972e1c617fb1ff56c0aad
Parent Commit: a19da5c
Lines Changed: +87, -36

9 Modified Paths:

/intern/cycles/bvh/bvh.cpp (+32, -25) (Diff)
/intern/cycles/bvh/bvh.h (+1, -1) (Diff)
/intern/cycles/kernel/geom/geom.h (+1, -1) (Diff)
/intern/cycles/kernel/geom/geom_qbvh.h (+2, -2) (Diff)
/intern/cycles/kernel/geom/geom_qbvh_shadow.h (+13, -1) (Diff)
/intern/cycles/kernel/geom/geom_qbvh_subsurface.h (+2, -1) (Diff)
/intern/cycles/kernel/geom/geom_qbvh_traversal.h (+12, -3) (Diff)
/intern/cycles/kernel/geom/geom_qbvh_volume.h (+12, -1) (Diff)
/intern/cycles/kernel/geom/geom_qbvh_volume_all.h (+12, -1) (Diff)
By: Miika HämäläinenLast update: Nov-07-2014 14:18MiikaHweb | 2003-2021