oscurart_tools/mesh/flipped_uvs.py

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   3 #  This program is free software; you can redistribute it and/or
   4 #  modify it under the terms of the GNU General Public License
   5 #  as published by the Free Software Foundation; either version 2
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  10 #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 #  GNU General Public License for more details.
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  14 #  along with this program; if not, write to the Free Software Foundation,
  15 #  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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  17 # ##### END GPL LICENSE BLOCK #####
  18
  19 # <pep8 compliant>
  20
  21
  22 import bpy
  23 import bmesh
  24
  25 def defSelectFlippedUvs(self, context):
  26     bm = bmesh.from_edit_mesh(bpy.context.active_object.data)
  27     bpy.context.scene.tool_settings.use_uv_select_sync = True
  28
  29     uvLayer = bm.loops.layers.uv.verify()
  30
  31
  32     for face in bm.faces:
  33         sum_edges = 0
  34
  35         for i in range(3):
  36             uv_A = face.loops[i][uvLayer].uv
  37             uv_B = face.loops[(i+1)%3][uvLayer].uv
  38             sum_edges += uv_B.cross(uv_A)
  39
  40         if sum_edges > 0:
  41             face.select_set(True)
  42
  43     bmesh.update_edit_mesh(bpy.context.object.data)
  44
  45
  46 class selectFlippedUvs(bpy.types.Operator):
  47     """Copy Uv Island"""
  48     bl_idname = "mesh.select_flipped_uvs"
  49     bl_label = "Select Flipped Uvs"
  50     bl_options = {"REGISTER", "UNDO"}
  51
  52     @classmethod
  53     def poll(cls, context):
  54         return (context.active_object is not None and
  55                 context.active_object.type == 'MESH' and
  56                 context.active_object.mode == "EDIT")
  57
  58     def execute(self, context):
  59         defSelectFlippedUvs(self, context)
  60         return {'FINISHED'}