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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__ = "McBuff, Nutti <nutti.metro@gmail.com>"
__status__ = "production"
__version__ = "5.1"
__date__ = "24 Feb 2018"
from math import sqrt
import bpy
import bmesh
from mathutils import Vector
from bpy.props import EnumProperty
from .. import common
def measure_wsuv_info(obj):
mesh_area = common.measure_mesh_area(obj)
uv_area = common.measure_uv_area(obj)
if not uv_area:
return None, None, None
if mesh_area == 0.0:
density = 0.0
else:
density = sqrt(uv_area) / sqrt(mesh_area)
return uv_area, mesh_area, density
class MUV_WSUVMeasure(bpy.types.Operator):
"""
Operation class: Measure face size
"""
bl_idname = "uv.muv_wsuv_measure"
bl_label = "Measure"
bl_description = "Measure face size for scale calculation"
bl_options = {'REGISTER', 'UNDO'}
def execute(self, context):
sc = context.scene
obj = context.active_object
uv_area, mesh_area, density = measure_wsuv_info(obj)
if not uv_area:
self.report({'WARNING'},
"Object must have more than one UV map and texture")
return {'CANCELLED'}
sc.muv_wsuv_src_uv_area = uv_area
sc.muv_wsuv_src_mesh_area = mesh_area
sc.muv_wsuv_src_density = density
self.report({'INFO'},
"UV Area: {0}, Mesh Area: {1}, Texel Density: {2}"
.format(uv_area, mesh_area, density))
return {'FINISHED'}
class MUV_WSUVApply(bpy.types.Operator):
"""
Operation class: Apply scaled UV
"""
bl_idname = "uv.muv_wsuv_apply"
bl_label = "Apply"
bl_description = "Apply scaled UV based on scale calculation"
bl_options = {'REGISTER', 'UNDO'}
origin = EnumProperty(
name="Origin",
description="Aspect Origin",
items=[
('CENTER', 'Center', 'Center'),
('LEFT_TOP', 'Left Top', 'Left Bottom'),
('LEFT_CENTER', 'Left Center', 'Left Center'),
('LEFT_BOTTOM', 'Left Bottom', 'Left Bottom'),
('CENTER_TOP', 'Center Top', 'Center Top'),
('CENTER_BOTTOM', 'Center Bottom', 'Center Bottom'),
('RIGHT_TOP', 'Right Top', 'Right Top'),
('RIGHT_CENTER', 'Right Center', 'Right Center'),
('RIGHT_BOTTOM', 'Right Bottom', 'Right Bottom')
],
default="CENTER"
)
def draw(self, _):
layout = self.layout
layout.prop(self, "origin")
def execute(self, context):
sc = context.scene
obj = context.active_object
bm = bmesh.from_edit_mesh(obj.data)
if common.check_version(2, 73, 0) >= 0:
bm.verts.ensure_lookup_table()
bm.edges.ensure_lookup_table()
bm.faces.ensure_lookup_table()
sel_faces = [f for f in bm.faces if f.select]
uv_area, mesh_area, density = measure_wsuv_info(obj)
if not uv_area:
self.report({'WARNING'},
"Object must have more than one UV map and texture")
return {'CANCELLED'}
uv_layer = bm.loops.layers.uv.verify()
if sc.muv_wsuv_mode == 'PROPORTIONAL':
tgt_density = sc.muv_wsuv_src_density * sqrt(mesh_area) / \
sqrt(sc.muv_wsuv_src_mesh_area)
elif sc.muv_wsuv_mode == 'SCALING':
tgt_density = sc.muv_wsuv_src_density * sc.muv_wsuv_scaling_factor
elif sc.muv_wsuv_mode == 'USER':
tgt_density = sc.muv_wsuv_tgt_density
elif sc.muv_wsuv_mode == 'CONSTANT':
tgt_density = sc.muv_wsuv_src_density
factor = tgt_density / density
# calculate origin
if self.origin == 'CENTER':
origin = Vector((0.0, 0.0))
num = 0
for f in sel_faces:
for l in f.loops:
uv = l[uv_layer].uv
origin = origin + uv
num = num + 1
origin = origin / num
elif self.origin == 'LEFT_TOP':
origin = Vector((100000.0, -100000.0))
for f in sel_faces:
for l in f.loops:
uv = l[uv_layer].uv
origin.x = min(origin.x, uv.x)
origin.y = max(origin.y, uv.y)
elif self.origin == 'LEFT_CENTER':
origin = Vector((100000.0, 0.0))
num = 0
for f in sel_faces:
for l in f.loops:
uv = l[uv_layer].uv
origin.x = min(origin.x, uv.x)
origin.y = origin.y + uv.y
num = num + 1
origin.y = origin.y / num
elif self.origin == 'LEFT_BOTTOM':
origin = Vector((100000.0, 100000.0))
for f in sel_faces:
for l in f.loops:
uv = l[uv_layer].uv
origin.x = min(origin.x, uv.x)
origin.y = min(origin.y, uv.y)
elif self.origin == 'CENTER_TOP':
origin = Vector((0.0, -100000.0))
num = 0
for f in sel_faces:
for l in f.loops:
uv = l[uv_layer].uv
origin.x = origin.x + uv.x
origin.y = max(origin.y, uv.y)
num = num + 1
origin.x = origin.x / num
elif self.origin == 'CENTER_BOTTOM':
origin = Vector((0.0, 100000.0))
num = 0
for f in sel_faces:
for l in f.loops:
uv = l[uv_layer].uv
origin.x = origin.x + uv.x
origin.y = min(origin.y, uv.y)
num = num + 1
origin.x = origin.x / num
elif self.origin == 'RIGHT_TOP':
origin = Vector((-100000.0, -100000.0))
for f in sel_faces:
for l in f.loops:
uv = l[uv_layer].uv
origin.x = max(origin.x, uv.x)
origin.y = max(origin.y, uv.y)
elif self.origin == 'RIGHT_CENTER':
origin = Vector((-100000.0, 0.0))
num = 0
for f in sel_faces:
for l in f.loops:
uv = l[uv_layer].uv
origin.x = max(origin.x, uv.x)
origin.y = origin.y + uv.y
num = num + 1
origin.y = origin.y / num
elif self.origin == 'RIGHT_BOTTOM':
origin = Vector((-100000.0, 100000.0))
for f in sel_faces:
for l in f.loops:
uv = l[uv_layer].uv
origin.x = max(origin.x, uv.x)
origin.y = min(origin.y, uv.y)
# update UV coordinate
for f in sel_faces:
for l in f.loops:
uv = l[uv_layer].uv
diff = uv - origin
l[uv_layer].uv = origin + diff * factor
bmesh.update_edit_mesh(obj.data)
self.report({'INFO'}, "Scaling factor: {0}".format(factor))
return {'FINISHED'}
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