diff options
Diffstat (limited to 'source/blender/render/intern/raytrace/rayobject_rtbuild.cpp')
| -rw-r--r-- | source/blender/render/intern/raytrace/rayobject_rtbuild.cpp | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/source/blender/render/intern/raytrace/rayobject_rtbuild.cpp b/source/blender/render/intern/raytrace/rayobject_rtbuild.cpp index 81e41a20f2e..103fa3e6034 100644 --- a/source/blender/render/intern/raytrace/rayobject_rtbuild.cpp +++ b/source/blender/render/intern/raytrace/rayobject_rtbuild.cpp @@ -59,6 +59,7 @@ static void rtbuild_init(RTBuilder *b) b->primitives.begin = NULL; b->primitives.end = NULL; b->primitives.maxsize = 0; + b->depth = 0; for (int i = 0; i < RTBUILD_MAX_CHILDS; i++) b->child_offset[i] = 0; @@ -178,6 +179,8 @@ RTBuilder *rtbuild_get_child(RTBuilder *b, int child, RTBuilder *tmp) { rtbuild_init(tmp); + tmp->depth = b->depth + 1; + for (int i = 0; i < 3; i++) if (b->sorted_begin[i]) { tmp->sorted_begin[i] = b->sorted_begin[i] + b->child_offset[child]; @@ -336,6 +339,15 @@ int rtbuild_heuristic_object_split(RTBuilder *b, int nchilds) int baxis = -1, boffset = 0; if (size > nchilds) { + if (b->depth > RTBUILD_MAX_SAH_DEPTH) { + // for degenerate cases we avoid running out of stack space + // by simply splitting the children in the middle + b->child_offset[0] = 0; + b->child_offset[1] = (size+1)/2; + b->child_offset[2] = size; + return 2; + } + float bcost = FLT_MAX; baxis = -1; boffset = size / 2; |