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| author | Bastien Montagne <montagne29@wanadoo.fr> | 2017-06-06 19:49:02 +0300 |
|---|---|---|
| committer | Bastien Montagne <montagne29@wanadoo.fr> | 2017-06-06 19:49:02 +0300 |
| commit | 473d074b34b66d6f674bb2f06153533c9b636fd1 (patch) | |
| tree | b1439e47882c9473114ce27b619a666781ebd07f | |
| parent | 9950f0a0c210c235d2b33808b768191d57df1ca5 (diff) | |
Fix T51700: OBJ exporter would have inverted normals in some cases.
Applying a matrix with non-uniform negative scaling to a mesh requires
normals (face winfing) to be inverted back to their original orientation!
| -rw-r--r-- | io_scene_obj/__init__.py | 2 | ||||
| -rw-r--r-- | io_scene_obj/export_obj.py | 3 |
2 files changed, 4 insertions, 1 deletions
diff --git a/io_scene_obj/__init__.py b/io_scene_obj/__init__.py index 6d1312ec..6e854b9e 100644 --- a/io_scene_obj/__init__.py +++ b/io_scene_obj/__init__.py @@ -21,7 +21,7 @@ bl_info = { "name": "Wavefront OBJ format", "author": "Campbell Barton, Bastien Montagne", - "version": (2, 3, 3), + "version": (2, 3, 4), "blender": (2, 77, 0), "location": "File > Import-Export", "description": "Import-Export OBJ, Import OBJ mesh, UV's, materials and textures", diff --git a/io_scene_obj/export_obj.py b/io_scene_obj/export_obj.py index 89613368..e28d607d 100644 --- a/io_scene_obj/export_obj.py +++ b/io_scene_obj/export_obj.py @@ -397,6 +397,9 @@ def write_file(filepath, objects, scene, continue me.transform(EXPORT_GLOBAL_MATRIX * ob_mat) + # If negative scaling, we have to invert the normals... + if ob_mat.determinant() < 0.0: + me.flip_normals() if EXPORT_TRI: # _must_ do this first since it re-allocs arrays |