diff options
Diffstat (limited to 'io_scene_gltf2/blender/imp/gltf2_blender_mesh.py')
| -rwxr-xr-x | io_scene_gltf2/blender/imp/gltf2_blender_mesh.py | 47 |
1 files changed, 25 insertions, 22 deletions
diff --git a/io_scene_gltf2/blender/imp/gltf2_blender_mesh.py b/io_scene_gltf2/blender/imp/gltf2_blender_mesh.py index d87b216f..ef26a1a5 100755 --- a/io_scene_gltf2/blender/imp/gltf2_blender_mesh.py +++ b/io_scene_gltf2/blender/imp/gltf2_blender_mesh.py @@ -320,33 +320,36 @@ def do_primitives(gltf, mesh_idx, skin_idx, mesh, ob): # ---- # Assign materials to faces + has_materials = any(prim.material is not None for prim in pymesh.primitives) + if has_materials: + material_indices = np.empty(num_faces, dtype=np.uint32) + empty_material_slot_index = None + f = 0 - # Initialize to no-material, ie. an index guaranteed to be OOB for the - # material slots. A mesh obviously can't have more materials than it has - # primitives... - oob_material_idx = len(pymesh.primitives) - material_indices = np.full(num_faces, oob_material_idx) - - f = 0 - for prim in pymesh.primitives: - if prim.material is not None: - # Get the material - pymaterial = gltf.data.materials[prim.material] - vertex_color = 'COLOR_0' if 'COLOR_0' in prim.attributes else None - if vertex_color not in pymaterial.blender_material: - BlenderMaterial.create(gltf, prim.material, vertex_color) - material_name = pymaterial.blender_material[vertex_color] - - # Put material in slot (if not there) - if material_name not in mesh.materials: - mesh.materials.append(bpy.data.materials[material_name]) - material_index = mesh.materials.find(material_name) + for prim in pymesh.primitives: + if prim.material is not None: + # Get the material + pymaterial = gltf.data.materials[prim.material] + vertex_color = 'COLOR_0' if 'COLOR_0' in prim.attributes else None + if vertex_color not in pymaterial.blender_material: + BlenderMaterial.create(gltf, prim.material, vertex_color) + material_name = pymaterial.blender_material[vertex_color] + + # Put material in slot (if not there) + if material_name not in mesh.materials: + mesh.materials.append(bpy.data.materials[material_name]) + material_index = mesh.materials.find(material_name) + else: + if empty_material_slot_index is None: + mesh.materials.append(None) + empty_material_slot_index = len(mesh.materials) - 1 + material_index = empty_material_slot_index material_indices[f:f + prim.num_faces].fill(material_index) - f += prim.num_faces + f += prim.num_faces - mesh.polygons.foreach_set('material_index', material_indices) + mesh.polygons.foreach_set('material_index', material_indices) # ---- # Normals |