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authorJulien Duroure <julien.duroure@gmail.com>2020-09-17 19:53:03 +0300
committerJulien Duroure <julien.duroure@gmail.com>2020-09-17 19:53:03 +0300
commit051770b36de923a34a023ccd598dd315d2428f3a (patch)
tree2f642864d3680bc00c9d5fddb4ed11d76ac2deb3 /io_scene_gltf2/blender
parentf8e313f6267742a10b8df07977182e179fa0e6f4 (diff)
glTF exporter: Fix T79104: avoid zero normals when degenerate tris
Diffstat (limited to 'io_scene_gltf2/blender')
-rwxr-xr-xio_scene_gltf2/blender/exp/gltf2_blender_extract.py6
1 files changed, 6 insertions, 0 deletions
diff --git a/io_scene_gltf2/blender/exp/gltf2_blender_extract.py b/io_scene_gltf2/blender/exp/gltf2_blender_extract.py
index ca38aa72..5b9e68f5 100755
--- a/io_scene_gltf2/blender/exp/gltf2_blender_extract.py
+++ b/io_scene_gltf2/blender/exp/gltf2_blender_extract.py
@@ -348,6 +348,12 @@ def __get_normals(blender_mesh, key_blocks, armature, blender_object, export_set
ns[:] = __apply_mat_to_all(normal_transform, ns)
__normalize_vecs(ns)
+ for ns in [normals, *morph_normals]:
+ # Replace zero normals with the unit UP vector.
+ # Seems to happen sometimes with degenerate tris?
+ is_zero = ~ns.any(axis=1)
+ ns[is_zero, 2] = 1
+
# glTF stores deltas in morph targets
for ns in morph_normals:
ns -= normals