diff options
author | Stefan Werner <swerner@smithmicro.com> | 2016-05-23 14:27:46 +0300 |
---|---|---|
committer | Sergey Sharybin <sergey.vfx@gmail.com> | 2016-05-23 14:34:14 +0300 |
commit | 7a35a0f4196bc2ece323c24cdecaba568555eb4d (patch) | |
tree | c09d93dfb56a7bcaff8730b81a6fe11f610fed85 /intern | |
parent | cdcb0826eebcd954306fdc6f1f601e183cc3c20b (diff) |
Fixed a rare case of NaN in Cycles
This fixes a rare case where NaNs could exist inside Cycles.
When certain invalid meshes were passed in, Cycles would try too normalize
a zero length normal during its setup stage. While it does check against
division by zero, it still returns a zero length normal and passes it on to
the path tracing kernel. The kernel then operates under the assumption that
normals are valid, and in the case of such a zero length normal, would
eventually create NaNs that propagate through and result in black pixels.
Reviewers: #cycles
Subscribers: brecht, sergey
Projects: #cycles
Differential Revision: https://developer.blender.org/D2008
Diffstat (limited to 'intern')
-rw-r--r-- | intern/cycles/render/mesh.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/intern/cycles/render/mesh.cpp b/intern/cycles/render/mesh.cpp index de1533c26af..d26404035eb 100644 --- a/intern/cycles/render/mesh.cpp +++ b/intern/cycles/render/mesh.cpp @@ -285,7 +285,7 @@ static float3 compute_face_normal(const Mesh::Triangle& t, float3 *verts) float normlen = len(norm); if(normlen == 0.0f) - return make_float3(0.0f, 0.0f, 0.0f); + return make_float3(1.0f, 0.0f, 0.0f); return norm / normlen; } |