diff options
| author | Brecht Van Lommel <brecht@blender.org> | 2022-07-13 17:54:53 +0300 |
|---|---|---|
| committer | Brecht Van Lommel <brecht@blender.org> | 2022-07-15 19:46:24 +0300 |
| commit | 5152c7c152e52d563cbd3ba3c792de3af0c2c14f (patch) | |
| tree | 45cad004066413ce309279ad52f2a363e5477150 /intern/cycles/kernel/types.h | |
| parent | bb376da6dfdd2476fc3738ce1fc89dac27825cef (diff) | |
Cycles: refactor rays to have start and end distance, fix precision issues
For transparency, volume and light intersection rays, adjust these distances
rather than the ray start position. This way we increment the start distance
by the smallest possible float increment to avoid self intersections, and be
sure it works as the distance compared to be will be exactly the same as
before, due to the ray start position and direction remaining the same.
Fix T98764, T96537, hair ray tracing precision issues.
Differential Revision: https://developer.blender.org/D15455
Diffstat (limited to 'intern/cycles/kernel/types.h')
| -rw-r--r-- | intern/cycles/kernel/types.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/intern/cycles/kernel/types.h b/intern/cycles/kernel/types.h index 62ac75e5e4d..05320deed19 100644 --- a/intern/cycles/kernel/types.h +++ b/intern/cycles/kernel/types.h @@ -535,7 +535,8 @@ typedef struct RaySelfPrimitives { typedef struct Ray { float3 P; /* origin */ float3 D; /* direction */ - float t; /* length of the ray */ + float tmin; /* start distance */ + float tmax; /* end distance */ float time; /* time (for motion blur) */ RaySelfPrimitives self; |