diff options
Diffstat (limited to 'intern/cycles/render')
-rw-r--r-- | intern/cycles/render/mesh_subdivision.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/intern/cycles/render/mesh_subdivision.cpp b/intern/cycles/render/mesh_subdivision.cpp index c8cc3abf7d9..3b4841f5b20 100644 --- a/intern/cycles/render/mesh_subdivision.cpp +++ b/intern/cycles/render/mesh_subdivision.cpp @@ -284,7 +284,12 @@ struct OsdPatch : Patch { if(dPdu) *dPdu = du; if(dPdv) *dPdv = dv; - if(N) *N = normalize(cross(du, dv)); + if(N) { + *N = cross(du, dv); + + float t = len(*N); + *N = (t != 0.0f) ? *N/t : make_float3(0.0f, 0.0f, 1.0f); + } } BoundBox bound() { return BoundBox::empty; } |