Fixed a bug where collision meshes would not properly be exported in WYSIWYG mode

src/builder.py

@@ -12,6 +12,7 @@ class ASEBuilderError(Exception):
 class ASEBuilderOptions(object):
     def __init__(self):
         self.scale = 1.0
+        self.use_raw_mesh_data = False
 
 
 class ASEBuilder(object):
@@ -19,42 +20,57 @@ class ASEBuilder(object):
         ase = ASE()
 
         main_geometry_object = None
-        for obj in context.selected_objects:
-            if obj is None or obj.type != 'MESH':
+        for selected_object in context.selected_objects:
+            if selected_object is None or selected_object.type != 'MESH':
                 continue
 
-            mesh_data = obj.data
+            # Evaluate the mesh after modifiers are applied
+            if options.use_raw_mesh_data:
+                mesh_object = selected_object
+                mesh_data = mesh_object.data
+            else:
+                depsgraph = context.evaluated_depsgraph_get()
+                bm = bmesh.new()
+                bm.from_object(selected_object, depsgraph)
+                mesh_data = bpy.data.meshes.new('')
+                bm.to_mesh(mesh_data)
+                del bm
+                mesh_object = bpy.data.objects.new('', mesh_data)
+                mesh_object.matrix_world = selected_object.matrix_world
 
-            if not is_collision_name(obj.name) and main_geometry_object is not None:
+            if not is_collision_name(selected_object.name) and main_geometry_object is not None:
                 geometry_object = main_geometry_object
             else:
                 geometry_object = ASEGeometryObject()
-                geometry_object.name = obj.name
+                geometry_object.name = selected_object.name
                 if not geometry_object.is_collision:
                     main_geometry_object = geometry_object
                 ase.geometry_objects.append(geometry_object)
 
             if geometry_object.is_collision:
+                # Test that collision meshes are manifold and convex.
                 bm = bmesh.new()
-                bm.from_mesh(obj.data)
+                bm.from_mesh(mesh_object.data)
                 for edge in bm.edges:
                     if not edge.is_manifold:
-                        raise ASEBuilderError(f'Collision mesh \'{obj.name}\' is not manifold')
+                        del bm
+                        raise ASEBuilderError(f'Collision mesh \'{selected_object.name}\' is not manifold')
                     if not edge.is_convex:
-                        raise ASEBuilderError(f'Collision mesh \'{obj.name}\' is not convex')
+                        del bm
+                        raise ASEBuilderError(f'Collision mesh \'{selected_object.name}\' is not convex')
 
-            if not geometry_object.is_collision and len(mesh_data.materials) == 0:
-                raise ASEBuilderError(f'Mesh \'{obj.name}\' must have at least one material')
+            if not geometry_object.is_collision and len(selected_object.data.materials) == 0:
+                raise ASEBuilderError(f'Mesh \'{selected_object.name}\' must have at least one material')
 
-            vertex_transform = Matrix.Scale(options.scale, 4) @ Matrix.Rotation(math.pi, 4, 'Z') @ obj.matrix_world
+            vertex_transform = Matrix.Scale(options.scale, 4) @ Matrix.Rotation(math.pi, 4, 'Z') @ mesh_object.matrix_world
             for vertex_index, vertex in enumerate(mesh_data.vertices):
                 geometry_object.vertices.append(vertex_transform @ vertex.co)
 
             material_indices = []
             if not geometry_object.is_collision:
-                for mesh_material_index, material in enumerate(mesh_data.materials):
+                for mesh_material_index, material in enumerate(selected_object.data.materials):
                     if material is None:
-                        raise ASEBuilderError(f'Material slot {mesh_material_index + 1} for mesh \'{obj.name}\' cannot be empty')
+                        raise ASEBuilderError(f'Material slot {mesh_material_index + 1} for mesh \'{selected_object.name}\' cannot be empty')
                     try:
                         # Reuse existing material entries for duplicates
                         material_index = ase.materials.index(material.name)
@@ -85,8 +101,8 @@ class ASEBuilder(object):
                 face.smoothing = (poly_groups[loop_triangle.polygon_index] - 1) % 32
                 geometry_object.faces.append(face)
 
-            # Normals
             if not geometry_object.is_collision:
+                # Normals
                 for face_index, loop_triangle in enumerate(mesh_data.loop_triangles):
                     face_normal = ASEFaceNormal()
                     face_normal.normal = loop_triangle.normal
@@ -98,7 +114,6 @@ class ASEBuilder(object):
                         face_normal.vertex_normals.append(vertex_normal)
                     geometry_object.face_normals.append(face_normal)
 
-            if not geometry_object.is_collision:
                 # Texture Coordinates
                 for i, uv_layer_data in enumerate([x.data for x in mesh_data.uv_layers]):
                     if i >= len(geometry_object.uv_layers):
@@ -108,8 +123,7 @@ class ASEBuilder(object):
                         u, v = uv_layer_data[loop_index].uv
                         uv_layer.texture_vertices.append((u, v, 0.0))
 
-            # Texture Faces
-            if not geometry_object.is_collision:
+                # Texture Faces
                 for loop_triangle in mesh_data.loop_triangles:
                     geometry_object.texture_vertex_faces.append((
                         geometry_object.texture_vertex_offset + loop_triangle.loops[0],
@@ -117,11 +131,11 @@ class ASEBuilder(object):
                         geometry_object.texture_vertex_offset + loop_triangle.loops[2]
                     ))
 
-            # Vertex Colors
-            if len(mesh_data.vertex_colors) > 0:
-                vertex_colors = mesh_data.vertex_colors.active.data
-                for color in map(lambda x: x.color, vertex_colors):
-                    geometry_object.vertex_colors.append(tuple(color[0:3]))
+                # Vertex Colors
+                if len(mesh_data.vertex_colors) > 0:
+                    vertex_colors = mesh_data.vertex_colors.active.data
+                    for color in map(lambda x: x.color, vertex_colors):
+                        geometry_object.vertex_colors.append(tuple(color[0:3]))
 
             # Update data offsets for next iteration
             geometry_object.texture_vertex_offset = len(mesh_data.loops)

src/exporter.py

@@ -24,6 +24,7 @@ class ASE_OT_ExportOperator(bpy.types.Operator, bpy_extras.io_utils.ExportHelper
                ('U', 'Unreal', '')),
         name='Units'
     )
+    use_raw_mesh_data: BoolProperty(default=False, name='Raw Mesh Data')
 
     units_scale = {
         'M': 60.352,
@@ -33,10 +34,12 @@ class ASE_OT_ExportOperator(bpy.types.Operator, bpy_extras.io_utils.ExportHelper
     def draw(self, context):
         layout = self.layout
         layout.prop(self, 'units', expand=False)
+        layout.prop(self, 'use_raw_mesh_data')
 
     def execute(self, context):
         options = ASEBuilderOptions()
         options.scale = self.units_scale[self.units]
+        options.use_raw_mesh_data = self.use_raw_mesh_data
         try:
             ase = ASEBuilder().build(context, options)
             ASEWriter().write(self.filepath, ase)