Fixing a bug found while checking "[#31937] UV/Image Editor: Copy Mirrored UV Coords...

The tool works OK, except it was messing vertices' order of polys, often giving ugly results! Now only using sorted list of vertices indices to find matching polys.

diff --git a/release/scripts/startup/bl_operators/mesh.py b/release/scripts/startup/bl_operators/mesh.py
index 4ed43a68e4811d02b5d5e4983132d8b16cc31094..51645bfeeabeed6c1a60fc203d470bcf238312b2 100644 (file)
--- a/release/scripts/startup/bl_operators/mesh.py
+++ b/release/scripts/startup/bl_operators/mesh.py
@@ -58,12 +58,9 @@ class MeshMirrorUV(Operator):
         vcos = (v.co.to_tuple(5) for v in mesh.vertices)
 
         for i, co in enumerate(vcos):
-            if co[0] > 0.0:
-                mirror_gt[co] = i
-            elif co[0] < 0.0:
-                mirror_lt[co] = i
-            else:
+            if co[0] >= 0.0:
                 mirror_gt[co] = i
+            if co[0] <= 0.0:
                 mirror_lt[co] = i
 
         #for i, v in enumerate(mesh.vertices):
@@ -97,14 +94,13 @@ class MeshMirrorUV(Operator):
             puvsel[i] = (False not in
                                (uv.select for uv in uv_loops[lstart:lend]))
             # Vert idx of the poly.
-            vidxs[i] = tuple(sorted(l.vertex_index
-                                    for l in loops[lstart:lend]))
+            vidxs[i] = tuple(l.vertex_index for l in loops[lstart:lend])
             # As we have no poly.center yet...
             pcents[i] = tuple(map(lambda x: x / p.loop_total,
                                   map(sum, zip(*(verts[idx].co
                                                  for idx in vidxs[i])))))
             # Preparing next step finding matching polys.
-            mirror_pm[vidxs[i]] = i
+            mirror_pm[tuple(sorted(vidxs[i]))] = i
 
         for i in range(nbr_polys):
             # Find matching mirror poly.