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Cycles: Fix crash when empty mesh has subdivision

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OpenSubdiv doesn't like empty meshes, so we need to be careful not to
subdivide when the mesh is empty.
This commit is contained in:
Mai Lavelle 2016-08-23 14:49:10 -04:00
parent 74bd809962
commit 438bcc6d28
1 changed files with 4 additions and 2 deletions
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6
intern/cycles/render/mesh_subdivision.cpp
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@ -299,7 +299,9 @@ void Mesh::tessellate(DiagSplit *split)
bool need_packed_patch_table = false;
if(subdivision_type == SUBDIVISION_CATMULL_CLARK) {
osd_data.build_from_mesh(this);
if(subd_faces.size()) {
osd_data.build_from_mesh(this);
}
}
else
#endif
@ -468,7 +470,7 @@ void Mesh::tessellate(DiagSplit *split)
/* keep subdivision for corner attributes disabled for now */
attr.flags &= ~ATTR_SUBDIVIDED;
}
else {
else if(subd_faces.size()) {
osd_data.subdivide_attribute(attr);
need_packed_patch_table = true;