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# SPDX-License-Identifier: GPL-2.0-or-later
# <pep8-80 compliant>
__author__ = "Keith (Wahooney) Boshoff, Nutti <nutti.metro@gmail.com>"
__status__ = "production"
__version__ = "6.5"
__date__ = "6 Mar 2021"
import bpy
from bpy.props import (
EnumProperty,
FloatProperty,
BoolProperty,
)
import bmesh
from mathutils import Vector, Euler
from ..utils.bl_class_registry import BlClassRegistry
from ..utils.property_class_registry import PropertyClassRegistry
from ..utils import compatibility as compat
from .. import common
def _is_valid_context(context):
objs = common.get_uv_editable_objects(context)
if not objs:
return False
# only edit mode is allowed to execute
if context.object.mode != 'EDIT':
return False
# only 'VIEW_3D' space is allowed to execute
if not common.is_valid_space(context, ['VIEW_3D']):
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, transformed):
"""
Copy UV coordinates from one UV face to another
"""
for sl in src.loops:
suv = sl[uv_layer].uv.copy()
svco = transformed[sl.vert].copy()
for dl in dst.loops:
dvco = transformed[dl.vert].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, transformed):
"""
Get center coordinate of the face
"""
center = Vector((0.0, 0.0, 0.0))
for v in face.verts:
tv = transformed[v]
center = center + tv
return center / len(face.verts)
@PropertyClassRegistry()
class _Properties:
idname = "mirror_uv"
@classmethod
def init_props(cls, scene):
scene.muv_mirror_uv_enabled = BoolProperty(
name="Mirror UV Enabled",
description="Mirror UV is enabled",
default=False
)
scene.muv_mirror_uv_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'
)
scene.muv_mirror_uv_origin = EnumProperty(
items=(
('WORLD', "World", "World"),
("GLOBAL", "Global", "Global"),
('LOCAL', "Local", "Local"),
),
name="Origin",
description="Origin of the mirror operation",
default='LOCAL'
)
@classmethod
def del_props(cls, scene):
del scene.muv_mirror_uv_enabled
del scene.muv_mirror_uv_axis
del scene.muv_mirror_uv_origin
@BlClassRegistry()
@compat.make_annotations
class MUV_OT_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
)
origin = EnumProperty(
items=(
('WORLD', "World", "World"),
("GLOBAL", "Global", "Global"),
('LOCAL', "Local", "Local"),
),
name="Origin",
description="Origin of the mirror operation",
default='LOCAL'
)
@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 _get_world_vertices(self, obj, bm):
# Get world orientation matrix.
world_orientation_mat = obj.matrix_world
# Move to local to world.
transformed = {}
for v in bm.verts:
transformed[v] = compat.matmul(world_orientation_mat, v.co)
return transformed
def _get_global_vertices(self, obj, bm):
# Get world rotation matrix.
eular = Euler(obj.rotation_euler)
rotation_mat = eular.to_matrix()
# Get center location of all vertices.
center_location = Vector((0.0, 0.0, 0.0))
for v in bm.verts:
center_location += v.co
center_location /= len(bm.verts)
# Move to local to global.
transformed = {}
for v in bm.verts:
transformed[v] = compat.matmul(rotation_mat, v.co)
transformed[v] -= center_location
return transformed
def _get_local_vertices(self, _, bm):
transformed = {}
# Get center location of all vertices.
center_location = Vector((0.0, 0.0, 0.0))
for v in bm.verts:
center_location += v.co
center_location /= len(bm.verts)
for v in bm.verts:
transformed[v] = v.co.copy()
transformed[v] -= center_location
return transformed
def execute(self, context):
objs = common.get_uv_editable_objects(context)
for obj in objs:
bm = bmesh.from_edit_mesh(obj.data)
error = self.error
axis = self.axis
if 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"
.format(obj.name))
return {'CANCELLED'}
uv_layer = bm.loops.layers.uv.verify()
if self.origin == 'WORLD':
transformed_verts = self._get_world_vertices(obj, bm)
elif self.origin == 'GLOBAL':
transformed_verts = self._get_global_vertices(obj, bm)
elif self.origin == 'LOCAL':
transformed_verts = self._get_local_vertices(obj, bm)
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, transformed_verts)
src = _get_face_center(f_src, transformed_verts)
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,
self.axis, self.error, transformed_verts)
bmesh.update_edit_mesh(obj.data)
return {'FINISHED'}
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