glTF exporter: fix face domain attribute export

2 files changed, 9 insertions, 3 deletions

diff --git a/io_scene_gltf2/__init__.py b/io_scene_gltf2/__init__.py
index 610c061a..5f40a81a 100755
--- a/io_scene_gltf2/__init__.py
+++ b/io_scene_gltf2/__init__.py
@@ -4,7 +4,7 @@
 bl_info = {
     'name': 'glTF 2.0 format',
     'author': 'Julien Duroure, Scurest, Norbert Nopper, Urs Hanselmann, Moritz Becher, Benjamin Schmithüsen, Jim Eckerlein, and many external contributors',
-    "version": (3, 4, 23),
+    "version": (3, 4, 24),
     'blender': (3, 3, 0),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',
diff --git a/io_scene_gltf2/blender/exp/gltf2_blender_gather_primitives_extract.py b/io_scene_gltf2/blender/exp/gltf2_blender_gather_primitives_extract.py
index 74682ce7..3e69c2c8 100644
--- a/io_scene_gltf2/blender/exp/gltf2_blender_gather_primitives_extract.py
+++ b/io_scene_gltf2/blender/exp/gltf2_blender_gather_primitives_extract.py
@@ -630,9 +630,15 @@ class PrimitiveCreator:
         elif attr['blender_domain'] in ['FACE']:
             if attr['len'] > 1:
                 data = data.reshape(-1, attr['len'])
-            data = data.repeat(4, axis=0)
+            # data contains face attribute, and is len(faces) long
+            # We need to dispatch these len(faces) attribute in each dots lines
+            data_attr = np.empty(self.dots.shape[0] * attr['len'], dtype=attr['type'])
+            data_attr = data_attr.reshape(-1, attr['len'])
+            for idx, poly in enumerate(self.blender_mesh.polygons):
+                data_attr[list(poly.loop_indices)] = data[idx]
+            data_attr = data_attr.reshape(-1, attr['len'])
             for i in range(attr['len']):
-                self.dots[attr['gltf_attribute_name'] + str(i)] = data[:, i]
+                self.dots[attr['gltf_attribute_name'] + str(i)] = data_attr[:, i]
 
         else:
             print_console("ERROR", "domain not known")