From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 21 Mar 2021 16:14:18 +0000 (+0200)
Subject: Refactor the mesh exporter to use UVs directly from UV layers
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=9ab994ab4fedf938cbbdfe1ec1415e6c91844d21;p=libs%2Fgl.git

Refactor the mesh exporter to use UVs directly from UV layers
---

diff --git a/blender/io_mspgl/mesh.py b/blender/io_mspgl/mesh.py
index 2296019e..f5665256 100644
--- a/blender/io_mspgl/mesh.py
+++ b/blender/io_mspgl/mesh.py
@@ -83,7 +83,6 @@ class Face:
 		self.normal = face.normal
 		self.use_smooth = face.use_smooth
 		self.material_index = face.material_index
-		self.uvs = []
 		self.flag = False
 
 	def __cmp__(self, other):
@@ -95,6 +94,9 @@ class Face:
 		n = self.vertices.index(v)
 		return [(n+i)%len(self.vertices) for i in range(len(self.vertices))]
 
+	def get_loop_index(self, v):
+		return self.loop_indices[self.vertices.index(v)]
+
 	def get_edge(self, v1, v2):
 		key = make_edge_key(v1.index, v2.index)
 		for e in self.edges:
@@ -411,11 +413,6 @@ class Mesh:
 					for i in f.loop_indices:
 						l.uvs[i] = mathutils.Vector((*l.uvs[i], layer))
 
-		# Copy UVs from layers to faces
-		for f in self.faces:
-			for u in self.uv_layers:
-				f.uvs.append([u.uvs[i] for i in f.loop_indices])
-
 		prog_count = len(self.uv_layers)
 		prog_step = 0
 
@@ -446,13 +443,13 @@ class Mesh:
 			progress.pop_task()
 			prog_step += 1
 
-		# Copy UVs from faces to vertices
+		# Copy UVs from layers to vertices
 		for v in self.vertices:
 			if v.faces:
 				# All faces still connected to the vertex have the same UV value
 				f = v.faces[0]
-				i = f.vertices.index(v)
-				v.uvs = [u[i] for u in f.uvs]
+				i = f.get_loop_index(v)
+				v.uvs = [u.uvs[i] for u in self.uv_layers]
 			else:
 				v.uvs = [(0.0, 0.0)]*len(self.uv_layers)
 
@@ -530,12 +527,13 @@ class Mesh:
 		return group
 
 	def find_uv_group(self, vertex, face, index):
-		uv = face.uvs[index][face.vertices.index(vertex)]
+		layer = self.uv_layers[index]
+		uv = layer.uvs[face.get_loop_index(vertex)]
 		face.flag = True
 
 		group = [face]
 		for f in vertex.faces:
-			if not f.flag and f.uvs[index][f.vertices.index(vertex)]==uv:
+			if not f.flag and layer.uvs[f.get_loop_index(vertex)]==uv:
 				f.flag = True
 				group.append(f)