diff options
| author | Sergey Sharybin <sergey.vfx@gmail.com> | 2016-07-26 17:30:13 +0300 |
|---|---|---|
| committer | Sergey Sharybin <sergey.vfx@gmail.com> | 2016-07-26 18:16:23 +0300 |
| commit | 70307941715f1274b9ca7f859fcc93ab5f5c5c66 (patch) | |
| tree | 28a3019e739e2a71b0b66e608ab339f9d8611a58 /intern/cycles/kernel/bvh/qbvh_volume_all.h | |
| parent | b91aea60964e8f01b2ed269734bc2700659fcbb1 (diff) | |
Cycles: Revert previous fixes to intersect_all functions
While they prevent legit write past the array boundary error
those fixes introduced regression in behavior when having exact
max_hits transparent intersections and nothing else.
Previous code would have considered such case a totally opaque,
but it's not correct.
Fixes T48941: Some materials don't get transparent shadows anymore
Diffstat (limited to 'intern/cycles/kernel/bvh/qbvh_volume_all.h')
| -rw-r--r-- | intern/cycles/kernel/bvh/qbvh_volume_all.h | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/intern/cycles/kernel/bvh/qbvh_volume_all.h b/intern/cycles/kernel/bvh/qbvh_volume_all.h index 90cad9d91c0..4d3028b37bf 100644 --- a/intern/cycles/kernel/bvh/qbvh_volume_all.h +++ b/intern/cycles/kernel/bvh/qbvh_volume_all.h @@ -268,12 +268,14 @@ ccl_device uint BVH_FUNCTION_FULL_NAME(QBVH)(KernelGlobals *kg, /* Intersect ray against primitive. */ hit = triangle_intersect(kg, &isect_precalc, isect_array, P, visibility, object, prim_addr); if(hit) { - /* Update number of hits now, so we do proper check on max bounces. */ + /* Move on to next entry in intersections array. */ + isect_array++; num_hits++; #if BVH_FEATURE(BVH_INSTANCING) num_hits_in_instance++; #endif - if(num_hits >= max_hits) { + isect_array->t = isect_t; + if(num_hits == max_hits) { #if BVH_FEATURE(BVH_INSTANCING) # if BVH_FEATURE(BVH_MOTION) float t_fac = 1.0f / len(transform_direction(&ob_itfm, dir)); @@ -287,9 +289,6 @@ ccl_device uint BVH_FUNCTION_FULL_NAME(QBVH)(KernelGlobals *kg, #endif /* BVH_FEATURE(BVH_INSTANCING) */ return num_hits; } - /* Move on to next entry in intersections array */ - isect_array++; - isect_array->t = isect_t; } } break; @@ -307,12 +306,14 @@ ccl_device uint BVH_FUNCTION_FULL_NAME(QBVH)(KernelGlobals *kg, /* Intersect ray against primitive. */ hit = motion_triangle_intersect(kg, isect_array, P, dir, ray->time, visibility, object, prim_addr); if(hit) { - /* Update number of hits now, so we do proper check on max bounces. */ + /* Move on to next entry in intersections array. */ + isect_array++; num_hits++; # if BVH_FEATURE(BVH_INSTANCING) num_hits_in_instance++; # endif - if(num_hits >= max_hits) { + isect_array->t = isect_t; + if(num_hits == max_hits) { # if BVH_FEATURE(BVH_INSTANCING) # if BVH_FEATURE(BVH_MOTION) float t_fac = 1.0f / len(transform_direction(&ob_itfm, dir)); @@ -326,9 +327,6 @@ ccl_device uint BVH_FUNCTION_FULL_NAME(QBVH)(KernelGlobals *kg, # endif /* BVH_FEATURE(BVH_INSTANCING) */ return num_hits; } - /* Move on to next entry in intersections array */ - isect_array++; - isect_array->t = isect_t; } } break; |