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# ##### BEGIN GPL LICENSE BLOCK #####
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####
# <pep8-80 compliant>
import bpy
from bpy.types import Operator
from bpy.props import EnumProperty
class MeshMirrorUV(Operator):
'''Copy mirror UV coordinates on the X axis based on a mirrored mesh'''
bl_idname = "mesh.faces_mirror_uv"
bl_label = "Copy Mirrored UV coords"
bl_options = {'REGISTER', 'UNDO'}
direction = EnumProperty(
name="Axis Direction",
items=(('POSITIVE', "Positive", ""),
('NEGATIVE', "Negative", "")),
)
@classmethod
def poll(cls, context):
obj = context.active_object
return (obj and obj.type == 'MESH' and obj.data.uv_textures.active)
def execute(self, context):
DIR = (self.direction == 'NEGATIVE')
ob = context.active_object
is_editmode = (ob.mode == 'EDIT')
if is_editmode:
bpy.ops.object.mode_set(mode='OBJECT', toggle=False)
mesh = ob.data
# mirror lookups
mirror_gt = {}
mirror_lt = {}
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:
mirror_gt[co] = i
mirror_lt[co] = i
#for i, v in enumerate(mesh.vertices):
vmap = {}
for mirror_a, mirror_b in ((mirror_gt, mirror_lt),
(mirror_lt, mirror_gt)):
for co, i in mirror_a.items():
nco = (-co[0], co[1], co[2])
j = mirror_b.get(nco)
if j is not None:
vmap[i] = j
active_uv_layer = mesh.uv_textures.active.data
fuvs = [(uv.uv1, uv.uv2, uv.uv3, uv.uv4) for uv in active_uv_layer]
fuvs_cpy = [(uv[0].copy(), uv[1].copy(), uv[2].copy(), uv[3].copy())
for uv in fuvs]
# as a list
faces = mesh.faces[:]
fuvsel = [(False not in uv.select_uv) for uv in active_uv_layer]
fcents = [f.center for f in faces]
# find mirror faces
mirror_fm = {}
for i, f in enumerate(faces):
verts = list(f.vertices)
verts.sort()
verts = tuple(verts)
mirror_fm[verts] = i
fmap = {}
for i, f in enumerate(faces):
verts = [vmap.get(j) for j in f.vertices]
if None not in verts:
verts.sort()
j = mirror_fm.get(tuple(verts))
if j is not None:
fmap[i] = j
for i, j in fmap.items():
if not fuvsel[i] or not fuvsel[j]:
continue
elif DIR == 0 and fcents[i][0] < 0.0:
continue
elif DIR == 1 and fcents[i][0] > 0.0:
continue
# copy UVs
uv1 = fuvs[i]
uv2 = fuvs_cpy[j]
# get the correct rotation
v1 = faces[j].vertices[:]
v2 = [vmap[k] for k in faces[i].vertices[:]]
if len(v1) == len(v2):
for k in range(len(v1)):
k_map = v1.index(v2[k])
uv1[k].xy = - (uv2[k_map].x - 0.5) + 0.5, uv2[k_map].y
if is_editmode:
bpy.ops.object.mode_set(mode='EDIT', toggle=False)
return {'FINISHED'}
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