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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__ = "Nutti <nutti.metro@gmail.com>"
__status__ = "production"
__version__ = "5.1"
__date__ = "24 Feb 2018"
from math import fabs
import bpy
import bmesh
import mathutils
from bpy.props import (
FloatProperty,
FloatVectorProperty,
BoolProperty,
)
from mathutils import Vector
from .. import common
class MUV_PackUV(bpy.types.Operator):
"""
Operation class: Pack UV with same UV islands are integrated
Island matching algorithm
- Same center of UV island
- Same size of UV island
- Same number of UV
"""
bl_idname = "uv.muv_packuv"
bl_label = "Pack UV"
bl_description = "Pack UV (Same UV Islands are integrated)"
bl_options = {'REGISTER', 'UNDO'}
rotate = BoolProperty(
name="Rotate",
description="Rotate option used by default pack UV function",
default=False)
margin = FloatProperty(
name="Margin",
description="Margin used by default pack UV function",
min=0,
max=1,
default=0.001)
allowable_center_deviation = FloatVectorProperty(
name="Allowable Center Deviation",
description="Allowable center deviation to judge same UV island",
min=0.000001,
max=0.1,
default=(0.001, 0.001),
size=2
)
allowable_size_deviation = FloatVectorProperty(
name="Allowable Size Deviation",
description="Allowable sizse deviation to judge same UV island",
min=0.000001,
max=0.1,
default=(0.001, 0.001),
size=2
)
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()
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()
selected_faces = [f for f in bm.faces if f.select]
island_info = common.get_island_info(obj)
num_group = self.__group_island(island_info)
loop_lists = [l for f in bm.faces for l in f.loops]
bpy.ops.mesh.select_all(action='DESELECT')
# pack UV
for gidx in range(num_group):
group = list(filter(
lambda i, idx=gidx: i['group'] == idx, island_info))
for f in group[0]['faces']:
f['face'].select = True
bmesh.update_edit_mesh(obj.data)
bpy.ops.uv.select_all(action='SELECT')
bpy.ops.uv.pack_islands(rotate=self.rotate, margin=self.margin)
# copy/paste UV among same islands
for gidx in range(num_group):
group = list(filter(
lambda i, idx=gidx: i['group'] == idx, island_info))
if len(group) <= 1:
continue
for g in group[1:]:
for (src_face, dest_face) in zip(
group[0]['sorted'], g['sorted']):
for (src_loop, dest_loop) in zip(
src_face['face'].loops, dest_face['face'].loops):
loop_lists[dest_loop.index][uv_layer].uv = loop_lists[
src_loop.index][uv_layer].uv
# restore face/UV selection
bpy.ops.uv.select_all(action='DESELECT')
bpy.ops.mesh.select_all(action='DESELECT')
for f in selected_faces:
f.select = True
bpy.ops.uv.select_all(action='SELECT')
bmesh.update_edit_mesh(obj.data)
return {'FINISHED'}
def __sort_island_faces(self, kd, uvs, isl1, isl2):
"""
Sort faces in island
"""
sorted_faces = []
for f in isl1['sorted']:
_, idx, _ = kd.find(
Vector((f['ave_uv'].x, f['ave_uv'].y, 0.0)))
sorted_faces.append(isl2['faces'][uvs[idx]['face_idx']])
return sorted_faces
def __group_island(self, island_info):
"""
Group island
"""
num_group = 0
while True:
# search islands which is not parsed yet
isl_1 = None
for isl_1 in island_info:
if isl_1['group'] == -1:
break
else:
break # all faces are parsed
if isl_1 is None:
break
isl_1['group'] = num_group
isl_1['sorted'] = isl_1['faces']
# search same island
for isl_2 in island_info:
if isl_2['group'] == -1:
dcx = isl_2['center'].x - isl_1['center'].x
dcy = isl_2['center'].y - isl_1['center'].y
dsx = isl_2['size'].x - isl_1['size'].x
dsy = isl_2['size'].y - isl_1['size'].y
center_x_matched = (
fabs(dcx) < self.allowable_center_deviation[0]
)
center_y_matched = (
fabs(dcy) < self.allowable_center_deviation[1]
)
size_x_matched = (
fabs(dsx) < self.allowable_size_deviation[0]
)
size_y_matched = (
fabs(dsy) < self.allowable_size_deviation[1]
)
center_matched = center_x_matched and center_y_matched
size_matched = size_x_matched and size_y_matched
num_uv_matched = (isl_2['num_uv'] == isl_1['num_uv'])
# are islands have same?
if center_matched and size_matched and num_uv_matched:
isl_2['group'] = num_group
kd = mathutils.kdtree.KDTree(len(isl_2['faces']))
uvs = [
{
'uv': Vector(
(f['ave_uv'].x, f['ave_uv'].y, 0.0)
),
'face_idx': fidx
} for fidx, f in enumerate(isl_2['faces'])
]
for i, uv in enumerate(uvs):
kd.insert(uv['uv'], i)
kd.balance()
# sort faces for copy/paste UV
isl_2['sorted'] = self.__sort_island_faces(
kd, uvs, isl_1, isl_2)
num_group = num_group + 1
return num_group
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