Blender exporter: Added smooth groups support

utils/exporters/blender/addons/io_three/exporter/api/mesh.py

@@ -124,7 +124,7 @@ def buffer_normal(mesh):
 
         for vertex_index in face.vertices:
             normal = mesh.vertices[vertex_index].normal
-            vector = (normal.x, normal.y, normal.z)
+            vector = (normal.x, normal.y, normal.z) if face.use_smooth else (face.normal.x, face.normal.y, face.normal.z)
             normals_.extend(vector)
 
     return normals_
@@ -356,7 +356,7 @@ def faces(mesh, options, material_list=None):
         if vertex_normals:
             for vertex in face.vertices:
                 normal = mesh.vertices[vertex].normal
-                normal = (normal.x, normal.y, normal.z)
+                normal = (normal.x, normal.y, normal.z) if face.use_smooth else (face.normal.x, face.normal.y, face.normal.z)
                 face_data.append(normal_indices[str(normal)])
                 mask[constants.NORMALS] = True
 
@@ -899,7 +899,7 @@ def _normals(mesh):
 
         for vertex_index in face.vertices:
             normal = mesh.vertices[vertex_index].normal
-            vector = (normal.x, normal.y, normal.z)
+            vector = (normal.x, normal.y, normal.z) if face.use_smooth else (face.normal.x, face.normal.y, face.normal.z)
 
             str_vec = str(vector)
             try:

utils/exporters/blender/addons/io_three/exporter/api/object.py

@@ -481,6 +481,19 @@ def extract_mesh(obj, options, recalculate=False):
         obj.select = False
         obj.hide = hidden_state
 
+    # split sharp edges
+    original_mesh = obj.data
+    obj.data = mesh_node
+    obj.select = True
+
+    bpy.ops.object.modifier_add(type='EDGE_SPLIT')
+    bpy.context.object.modifiers['EdgeSplit'].use_edge_angle = False
+    bpy.context.object.modifiers['EdgeSplit'].use_edge_sharp = True
+    bpy.ops.object.modifier_apply(apply_as='DATA', modifier='EdgeSplit')
+
+    obj.select = False
+    obj.data = original_mesh
+
     # recalculate the normals to face outwards, this is usually
     # best after applying a modifiers, especialy for something
     # like the mirror