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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__ = "4.3.1"
__date__ = "6 June 2017"
import bpy
from bpy.props import (
EnumProperty,
FloatProperty,
)
import bmesh
from mathutils import Vector
from . import muv_common
class MUV_MirrorUV(bpy.types.Operator):
"""
Operation class: Mirror UV
"""
bl_idname = "uv.muv_mirror_uv"
bl_label = "Mirror UV"
bl_options = {'REGISTER', 'UNDO'}
axis = EnumProperty(
items=(
('X', "X", "Mirror Along X axis"),
('Y', "Y", "Mirror Along Y axis"),
('Z', "Z", "Mirror Along Z axis")
),
name="Axis",
description="Mirror Axis",
default='X'
)
error = FloatProperty(
name="Error",
description="Error threshold",
default=0.001,
min=0.0,
max=100.0,
soft_min=0.0,
soft_max=1.0
)
def __is_vector_similar(self, 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(self, 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 self.__is_vector_similar(svco, dvco, error):
dl[uv_layer].uv = suv.copy()
def __get_face_center(self, 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)
@classmethod
def poll(cls, context):
obj = context.active_object
return obj and obj.type == 'MESH'
def execute(self, context):
obj = context.active_object
bm = bmesh.from_edit_mesh(obj.data)
error = self.error
axis = self.axis
if muv_common.check_version(2, 73, 0) >= 0:
bm.faces.ensure_lookup_table()
if not bm.loops.layers.uv:
self.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 = self.__get_face_center(f_dst)
src = self.__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 self.__is_vector_similar(dst, src, error):
self.__mirror_uvs(
uv_layer, f_src, f_dst, self.axis, self.error)
bmesh.update_edit_mesh(obj.data)
return {'FINISHED'}
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