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Fix #33641: cycles self intersection artifacts with motion blur and one of the

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X/Y/Z coordinates close to 0.
This commit is contained in:
Brecht Van Lommel 2012-12-23 12:52:10 +00:00
parent ba14beb000
commit 779662aff7
1 changed files with 6 additions and 3 deletions
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9
intern/cycles/kernel/kernel_bvh.h
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@ -457,12 +457,15 @@ __device_inline float3 ray_offset(float3 P, float3 Ng)
{ {
#ifdef __INTERSECTION_REFINE__ #ifdef __INTERSECTION_REFINE__
const float epsilon_f = 1e-5f; const float epsilon_f = 1e-5f;
/* ideally this should match epsilon_f, but instancing/mblur
* precision makes it problematic */
const float epsilon_test = 1e-1f;
const int epsilon_i = 32; const int epsilon_i = 32;
float3 res; float3 res;
/* x component */ /* x component */
if(fabsf(P.x) < epsilon_f) { if(fabsf(P.x) < epsilon_test) {
res.x = P.x + Ng.x*epsilon_f; res.x = P.x + Ng.x*epsilon_f;
} }
else { else {
@ -472,7 +475,7 @@ __device_inline float3 ray_offset(float3 P, float3 Ng)
} }
/* y component */ /* y component */
if(fabsf(P.y) < epsilon_f) { if(fabsf(P.y) < epsilon_test) {
res.y = P.y + Ng.y*epsilon_f; res.y = P.y + Ng.y*epsilon_f;
} }
else { else {
@ -482,7 +485,7 @@ __device_inline float3 ray_offset(float3 P, float3 Ng)
} }
/* z component */ /* z component */
if(fabsf(P.z) < epsilon_f) { if(fabsf(P.z) < epsilon_test) {
res.z = P.z + Ng.z*epsilon_f; res.z = P.z + Ng.z*epsilon_f;
} }
else { else {