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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__ = "imdjs, Nutti <nutti.metro@gmail.com>"
__status__ = "production"
__version__ = "6.2"
__date__ = "31 Jul 2019"
import bpy
from bpy.props import BoolProperty, 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):
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
# 'IMAGE_EDITOR' and 'VIEW_3D' space is allowed to execute.
# If 'View_3D' space is not allowed, you can't find option in Tool-Shelf
# after the execution
for space in context.area.spaces:
if (space.type == 'IMAGE_EDITOR') or (space.type == 'VIEW_3D'):
break
else:
return False
return True
@PropertyClassRegistry()
class _Properties:
idname = "smooth_uv"
@classmethod
def init_props(cls, scene):
scene.muv_smooth_uv_enabled = BoolProperty(
name="Smooth UV Enabled",
description="Smooth UV is enabled",
default=False
)
scene.muv_smooth_uv_transmission = BoolProperty(
name="Transmission",
description="Smooth linked UVs",
default=False
)
scene.muv_smooth_uv_mesh_infl = FloatProperty(
name="Mesh Influence",
description="Influence rate of mesh vertex",
min=0.0,
max=1.0,
default=0.0
)
scene.muv_smooth_uv_select = BoolProperty(
name="Select",
description="Select UVs which are smoothed",
default=False
)
@classmethod
def del_props(cls, scene):
del scene.muv_smooth_uv_enabled
del scene.muv_smooth_uv_transmission
del scene.muv_smooth_uv_mesh_infl
del scene.muv_smooth_uv_select
@BlClassRegistry()
@compat.make_annotations
class MUV_OT_SmoothUV(bpy.types.Operator):
bl_idname = "uv.muv_smooth_uv"
bl_label = "Smooth"
bl_description = "Smooth UV coordinates"
bl_options = {'REGISTER', 'UNDO'}
transmission = BoolProperty(
name="Transmission",
description="Smooth linked UVs",
default=False
)
mesh_infl = FloatProperty(
name="Mesh Influence",
description="Influence rate of mesh vertex",
min=0.0,
max=1.0,
default=0.0
)
select = BoolProperty(
name="Select",
description="Select UVs which are smoothed",
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 __smooth_wo_transmission(self, loop_seqs, uv_layer):
# calculate path length
loops = []
for hseq in loop_seqs:
loops.extend([hseq[0][0], hseq[0][1]])
full_vlen = 0
accm_vlens = [0.0]
full_uvlen = 0
accm_uvlens = [0.0]
orig_uvs = [loop_seqs[0][0][0][uv_layer].uv.copy()]
for l1, l2 in zip(loops[:-1], loops[1:]):
diff_v = l2.vert.co - l1.vert.co
full_vlen = full_vlen + diff_v.length
accm_vlens.append(full_vlen)
diff_uv = l2[uv_layer].uv - l1[uv_layer].uv
full_uvlen = full_uvlen + diff_uv.length
accm_uvlens.append(full_uvlen)
orig_uvs.append(l2[uv_layer].uv.copy())
for hidx, hseq in enumerate(loop_seqs):
pair = hseq[0]
for pidx, l in enumerate(pair):
if self.select:
l[uv_layer].select = True
# ignore start/end loop
if (hidx == 0 and pidx == 0) or\
((hidx == len(loop_seqs) - 1) and (pidx == len(pair) - 1)):
continue
# calculate target path length
# target = no influenced * (1 - infl) + influenced * infl
tgt_noinfl = full_uvlen * (hidx + pidx) / (len(loop_seqs))
tgt_infl = full_uvlen * accm_vlens[hidx * 2 + pidx] / full_vlen
target_length = tgt_noinfl * (1 - self.mesh_infl) + \
tgt_infl * self.mesh_infl
# get target UV
for i in range(len(accm_uvlens[:-1])):
# get line segment which UV will be placed
if ((accm_uvlens[i] <= target_length) and
(accm_uvlens[i + 1] > target_length)):
tgt_seg_len = target_length - accm_uvlens[i]
seg_len = accm_uvlens[i + 1] - accm_uvlens[i]
uv1 = orig_uvs[i]
uv2 = orig_uvs[i + 1]
target_uv = uv1 + (uv2 - uv1) * tgt_seg_len / seg_len
break
else:
self.report({'ERROR'}, "Failed to get target UV")
return {'CANCELLED'}
# update UV
l[uv_layer].uv = target_uv
def __smooth_w_transmission(self, loop_seqs, uv_layer):
# calculate path length
loops = []
for vidx in range(len(loop_seqs[0])):
ls = []
for hseq in loop_seqs:
ls.extend(hseq[vidx])
loops.append(ls)
orig_uvs = []
accm_vlens = []
full_vlens = []
accm_uvlens = []
full_uvlens = []
for ls in loops:
full_v = 0.0
accm_v = [0.0]
full_uv = 0.0
accm_uv = [0.0]
uvs = [ls[0][uv_layer].uv.copy()]
for l1, l2 in zip(ls[:-1], ls[1:]):
diff_v = l2.vert.co - l1.vert.co
full_v = full_v + diff_v.length
accm_v.append(full_v)
diff_uv = l2[uv_layer].uv - l1[uv_layer].uv
full_uv = full_uv + diff_uv.length
accm_uv.append(full_uv)
uvs.append(l2[uv_layer].uv.copy())
accm_vlens.append(accm_v)
full_vlens.append(full_v)
accm_uvlens.append(accm_uv)
full_uvlens.append(full_uv)
orig_uvs.append(uvs)
for hidx, hseq in enumerate(loop_seqs):
for vidx, (pair, uvs, accm_v, full_v, accm_uv, full_uv)\
in enumerate(zip(hseq, orig_uvs, accm_vlens, full_vlens,
accm_uvlens, full_uvlens)):
for pidx, l in enumerate(pair):
if self.select:
l[uv_layer].select = True
# ignore start/end loop
if hidx == 0 and pidx == 0:
continue
if hidx == len(loop_seqs) - 1 and pidx == len(pair) - 1:
continue
# calculate target path length
# target = no influenced * (1 - infl) + influenced * infl
tgt_noinfl = full_uv * (hidx + pidx) / (len(loop_seqs))
tgt_infl = full_uv * accm_v[hidx * 2 + pidx] / full_v
target_length = tgt_noinfl * (1 - self.mesh_infl) + \
tgt_infl * self.mesh_infl
# get target UV
for i in range(len(accm_uv[:-1])):
# get line segment to be placed
if ((accm_uv[i] <= target_length) and
(accm_uv[i + 1] > target_length)):
tgt_seg_len = target_length - accm_uv[i]
seg_len = accm_uv[i + 1] - accm_uv[i]
uv1 = uvs[i]
uv2 = uvs[i + 1]
target_uv = uv1 +\
(uv2 - uv1) * tgt_seg_len / seg_len
break
else:
self.report({'ERROR'}, "Failed to get target UV")
return {'CANCELLED'}
# update UV
l[uv_layer].uv = target_uv
def __smooth(self, loop_seqs, uv_layer):
if self.transmission:
self.__smooth_w_transmission(loop_seqs, uv_layer)
else:
self.__smooth_wo_transmission(loop_seqs, uv_layer)
def execute(self, context):
obj = context.active_object
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()
# loop_seqs[horizontal][vertical][loop]
loop_seqs, error = common.get_loop_sequences(bm, uv_layer)
if not loop_seqs:
self.report({'WARNING'}, error)
return {'CANCELLED'}
# smooth
self.__smooth(loop_seqs, uv_layer)
bmesh.update_edit_mesh(obj.data)
return {'FINISHED'}
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