diff options
| author | Sergey Sharybin <sergey.vfx@gmail.com> | 2014-12-15 19:18:01 +0300 |
|---|---|---|
| committer | Sergey Sharybin <sergey.vfx@gmail.com> | 2014-12-25 00:50:49 +0300 |
| commit | f770bc4757a2b471d5aaee048359096c1c79a6b2 (patch) | |
| tree | 853a0b93183aa814b4ec5a45f8050b47aa9c779d /intern/cycles/kernel/geom/geom_triangle.h | |
| parent | 57d235d9f496fd71f5b57cef36d34fae5bf9d9ce (diff) | |
Cycles: Implement watertight ray/triangle intersection
Using this paper: Sven Woop, Watertight Ray/Triangle Intersection
http://jcgt.org/published/0002/01/05/paper.pdf
This change is expected to address quite reasonable amount of reports from the
bug tracker, plus it might help reducing the noise in some scenes.
Unfortunately, it's currently about 7% slower than the previous solution with
pre-computed triangle plane equations, but maybe with some smart tweaks to the
code (tests reshuffle, using SIMD in a nice way or so) we can avoid the speed
regression.
But perhaps smartest thing to do here would be to change single triangle / ray
intersection with multiple triangles / ray intersections. That's how Embree does
this and it's watertight single ray intersection is not any faster that this.
Currently only triangle intersection is modified accordingly to the paper, in
the future we would also want to modify the node / ray intersection.
Reviewers: brecht, juicyfruit
Subscribers: dingto, ton
Differential Revision: https://developer.blender.org/D819
Diffstat (limited to 'intern/cycles/kernel/geom/geom_triangle.h')
| -rw-r--r-- | intern/cycles/kernel/geom/geom_triangle.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/intern/cycles/kernel/geom/geom_triangle.h b/intern/cycles/kernel/geom/geom_triangle.h index 0390804d131..dd3928682e3 100644 --- a/intern/cycles/kernel/geom/geom_triangle.h +++ b/intern/cycles/kernel/geom/geom_triangle.h @@ -17,7 +17,9 @@ /* Triangle Primitive * - * Basic triangle with 3 vertices is used to represent mesh surfaces. */ + * Basic triangle with 3 vertices is used to represent mesh surfaces. For BVH + * ray intersection we use a precomputed triangle storage to accelerate + * intersection at the cost of more memory usage */ CCL_NAMESPACE_BEGIN |