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# <pep8-80 compliant>
# ##### 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 #####
__author__ = "Keith (Wahooney) Boshoff, Nutti <nutti.metro@gmail.com>"
__status__ = "production"
__version__ = "5.2"
__date__ = "17 Nov 2018"
import bmesh
from mathutils import Vector
from .. import common
__all__ = [
'is_valid_context',
'is_vector_similar',
'mirror_uvs',
'get_face_center',
'MirrorUVImpl',
]
def is_valid_context(context):
obj = context.object
# only edit mode is allowed to execute
if obj is None:
return False
if obj.type != 'MESH':
return False
if context.object.mode != 'EDIT':
return False
# only 'VIEW_3D' space is allowed to execute
for space in context.area.spaces:
if space.type == 'VIEW_3D':
break
else:
return False
return True
def is_vector_similar(v1, v2, error):
"""
Check if two vectors are similar, within an error threshold
"""
within_err_x = abs(v2.x - v1.x) < error
within_err_y = abs(v2.y - v1.y) < error
within_err_z = abs(v2.z - v1.z) < error
return within_err_x and within_err_y and within_err_z
def mirror_uvs(uv_layer, src, dst, axis, error):
"""
Copy UV coordinates from one UV face to another
"""
for sl in src.loops:
suv = sl[uv_layer].uv.copy()
svco = sl.vert.co.copy()
for dl in dst.loops:
dvco = dl.vert.co.copy()
if axis == 'X':
dvco.x = -dvco.x
elif axis == 'Y':
dvco.y = -dvco.y
elif axis == 'Z':
dvco.z = -dvco.z
if is_vector_similar(svco, dvco, error):
dl[uv_layer].uv = suv.copy()
def get_face_center(face):
"""
Get center coordinate of the face
"""
center = Vector((0.0, 0.0, 0.0))
for v in face.verts:
center = center + v.co
return center / len(face.verts)
class MirrorUVImpl:
@classmethod
def poll(cls, context):
# we can not get area/space/region from console
if common.is_console_mode():
return True
return is_valid_context(context)
def execute(self, ops_obj, context):
obj = context.active_object
bm = bmesh.from_edit_mesh(obj.data)
error = ops_obj.error
axis = ops_obj.axis
if common.check_version(2, 73, 0) >= 0:
bm.faces.ensure_lookup_table()
if not bm.loops.layers.uv:
ops_obj.report({'WARNING'},
"Object must have more than one UV map")
return {'CANCELLED'}
uv_layer = bm.loops.layers.uv.verify()
faces = [f for f in bm.faces if f.select]
for f_dst in faces:
count = len(f_dst.verts)
for f_src in bm.faces:
# check if this is a candidate to do mirror UV
if f_src.index == f_dst.index:
continue
if count != len(f_src.verts):
continue
# test if the vertices x values are the same sign
dst = get_face_center(f_dst)
src = get_face_center(f_src)
if (dst.x > 0 and src.x > 0) or (dst.x < 0 and src.x < 0):
continue
# invert source axis
if axis == 'X':
src.x = -src.x
elif axis == 'Y':
src.y = -src.z
elif axis == 'Z':
src.z = -src.z
# do mirror UV
if is_vector_similar(dst, src, error):
mirror_uvs(
uv_layer, f_src, f_dst, ops_obj.axis, ops_obj.error)
bmesh.update_edit_mesh(obj.data)
return {'FINISHED'}
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