Add vertex colors to blender + fix unpack_color()

addons/io_scene_swbf_msh/msh_mesh_to_blend.py

@@ -40,6 +40,7 @@ def model_to_mesh_object(model: Model, scene : Scene, materials_map : Dict[str,
     vertex_positions = []
     vertex_uvs = []
     vertex_normals = []
+    vertex_colors = []
 
     # Keeps track of which vertices each group of weights affects
     # i.e. maps offset of vertices -> weights that affect them
@@ -76,6 +77,11 @@ def model_to_mesh_object(model: Model, scene : Scene, materials_map : Dict[str,
             if segment.normals:
                 vertex_normals += [tuple(convert_vector_space(n)) for n in segment.normals]
 
+            if segment.colors:
+                vertex_colors.extend(segment.colors)
+            else:
+                [vertex_colors.extend([0.0, 0.0, 0.0, 1.0]) for _ in range(len(segment.positions))]
+            
             if segment.weights:
                 vertex_weights_offsets[polygon_index_offset] = segment.weights
 
@@ -111,7 +117,6 @@ def model_to_mesh_object(model: Model, scene : Scene, materials_map : Dict[str,
         blender_mesh.vertices.add(len(vertex_positions))
         blender_mesh.vertices.foreach_set("co", [component for vertex_position in vertex_positions for component in vertex_position])
 
-
         # LOOPS 
 
         flat_indices = [index for polygon in polygons for index in polygon]
@@ -129,6 +134,9 @@ def model_to_mesh_object(model: Model, scene : Scene, materials_map : Dict[str,
         blender_mesh.uv_layers.new(do_init=False)
         blender_mesh.uv_layers[0].data.foreach_set("uv", [component for i in flat_indices for component in vertex_uvs[i]])
 
+        # Colors
+        blender_mesh.color_attributes.new("COLOR0", "FLOAT_COLOR", "POINT")
+        blender_mesh.color_attributes[0].data.foreach_set("color", vertex_colors)
 
 
         # POLYGONS/FACES

addons/io_scene_swbf_msh/msh_utilities.py

@@ -39,12 +39,9 @@ def pack_color(color) -> int:
     return packed
 
 def unpack_color(color: int) -> List[float]:
-
+    r = (color >> 16 & 0xFF) / 255.0
-    mask = int(0x000000ff)
+    g = (color >> 8  & 0xFF) / 255.0
-
+    b = (color >> 0  & 0xFF) / 255.0
-    r = (color & (mask << 16)) / 255.0
+    a = (color >> 24 & 0xFF) / 255.0
-    g = (color & (mask << 8)) / 255.0
-    b = (color & mask) / 255.0
-    a = (color & (mask << 24)) / 255.0
 
     return [r,g,b,a]