Fix texunit processing order to avoid artifacts in tbn vectors

[libs/gl.git] / blender / io_mesh_mspgl / mesh.py

diff --git a/blender/io_mesh_mspgl/mesh.py b/blender/io_mesh_mspgl/mesh.py
index e3405f9f8e055490b71bf7a4323abcfc1475c752..165c276fd1533c8b8adb89e85c13adddd4cc158d 100644 (file)
--- a/blender/io_mesh_mspgl/mesh.py
+++ b/blender/io_mesh_mspgl/mesh.py
@@ -41,13 +41,15 @@ class Vertex:
                        self._mvert = mv._mvert
                        self.normal = mv.normal
                        self.uvs = mv.uvs[:]
+                       self.tan = mv.tan
+                       self.bino = mv.bino
                else:
                        self._mvert = mv
                        self.uvs = []
+                       self.tan = None
+                       self.bino = None
                self.flag = False
                self.faces = []
-               self.tan = None
-               self.bino = None
 
        def __getattr__(self, attr):
                return getattr(self._mvert, attr)
@@ -295,24 +297,18 @@ class Mesh:
                                i = f.vertices.index(v)
                                v.uvs = [u[i] for u in f.uvs]
 
-       def compute_tbn(self, uvtex):
+       def compute_tbn(self, index):
                if not self.uv_textures:
                        return
 
-               uvtex_names = [u.name for u in self.uv_textures]
-               if uvtex in uvtex_names:
-                       uvtex_index = uvtex_names.index(uvtex)
-               else:
-                       uvtex_index = 0
-
                for v in self.vertices:
                        v.tan = mathutils.Vector()
                        v.bino = mathutils.Vector()
                        for f in v.faces:
                                fv = f.pivot_vertices(v)
-                               uv0 = fv[0].uvs[uvtex_index]
-                               uv1 = fv[1].uvs[uvtex_index]
-                               uv2 = fv[-1].uvs[uvtex_index]
+                               uv0 = fv[0].uvs[index]
+                               uv1 = fv[1].uvs[index]
+                               uv2 = fv[-1].uvs[index]
                                du1 = uv1[0]-uv0[0]
                                du2 = uv2[0]-uv0[0]
                                dv1 = uv1[1]-uv0[1]