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# SPDX-License-Identifier: GPL-2.0-or-later
# <pep8-80 compliant>
__author__ = "Nutti <nutti.metro@gmail.com>"
__status__ = "production"
__version__ = "6.6"
__date__ = "22 Apr 2022"
import bpy
from bpy.props import (
BoolProperty,
EnumProperty,
FloatProperty,
)
import bmesh
from .. import common
from ..utils.bl_class_registry import BlClassRegistry
from ..utils.property_class_registry import PropertyClassRegistry
from ..utils import compatibility as compat
def _is_valid_context(context):
# only 'VIEW_3D' space is allowed to execute
if not common.is_valid_space(context, ['VIEW_3D']):
return False
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
return True
@PropertyClassRegistry()
class _Properties:
idname = "unwrap_constraint"
@classmethod
def init_props(cls, scene):
scene.muv_unwrap_constraint_enabled = BoolProperty(
name="Unwrap Constraint Enabled",
description="Unwrap Constraint is enabled",
default=False
)
scene.muv_unwrap_constraint_u_const = BoolProperty(
name="U-Constraint",
description="Keep UV U-axis coordinate",
default=False
)
scene.muv_unwrap_constraint_v_const = BoolProperty(
name="V-Constraint",
description="Keep UV V-axis coordinate",
default=False
)
@classmethod
def del_props(cls, scene):
del scene.muv_unwrap_constraint_enabled
del scene.muv_unwrap_constraint_u_const
del scene.muv_unwrap_constraint_v_const
@BlClassRegistry(legacy=True)
@compat.make_annotations
class MUV_OT_UnwrapConstraint(bpy.types.Operator):
"""
Operation class: Unwrap with constrain UV coordinate
"""
bl_idname = "uv.muv_unwrap_constraint"
bl_label = "Unwrap Constraint"
bl_description = "Unwrap while keeping uv coordinate"
bl_options = {'REGISTER', 'UNDO'}
# property for original unwrap
method = EnumProperty(
name="Method",
description="Unwrapping method",
items=[
('ANGLE_BASED', 'Angle Based', 'Angle Based'),
('CONFORMAL', 'Conformal', 'Conformal')
],
default='ANGLE_BASED')
fill_holes = BoolProperty(
name="Fill Holes",
description="Virtual fill holes in meshes before unwrapping",
default=True)
correct_aspect = BoolProperty(
name="Correct Aspect",
description="Map UVs taking image aspect ratio into account",
default=True)
use_subsurf_data = BoolProperty(
name="Use Subsurf Modifier",
description="""Map UVs taking vertex position after subsurf
into account""",
default=False)
margin = FloatProperty(
name="Margin",
description="Space between islands",
max=1.0,
min=0.0,
default=0.001)
# property for this operation
u_const = BoolProperty(
name="U-Constraint",
description="Keep UV U-axis coordinate",
default=False
)
v_const = BoolProperty(
name="V-Constraint",
description="Keep UV V-axis coordinate",
default=False
)
@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, context):
objs = common.get_uv_editable_objects(context)
uv_list = {} # { Object: uv_list }
for obj in objs:
bm = bmesh.from_edit_mesh(obj.data)
if common.check_version(2, 73, 0) >= 0:
bm.faces.ensure_lookup_table()
# bpy.ops.uv.unwrap() makes one UV map at least
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()
# get original UV coordinate
faces = [f for f in bm.faces if f.select]
uv_list[obj] = []
for f in faces:
uvs = [l[uv_layer].uv.copy() for l in f.loops]
uv_list[obj].append(uvs)
# unwrap
bpy.ops.uv.unwrap(
method=self.method,
fill_holes=self.fill_holes,
correct_aspect=self.correct_aspect,
use_subsurf_data=self.use_subsurf_data,
margin=self.margin)
# when U/V-Constraint is checked, revert original coordinate
for obj in objs:
bm = bmesh.from_edit_mesh(obj.data)
if common.check_version(2, 73, 0) >= 0:
bm.faces.ensure_lookup_table()
uv_layer = bm.loops.layers.uv.verify()
faces = [f for f in bm.faces if f.select]
for f, uvs in zip(faces, uv_list[obj]):
for l, uv in zip(f.loops, uvs):
if self.u_const:
l[uv_layer].uv.x = uv.x
if self.v_const:
l[uv_layer].uv.y = uv.y
# update mesh
bmesh.update_edit_mesh(obj.data)
return {'FINISHED'}
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