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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__ = "4.3"
__date__ = "1 Apr 2017"
import bpy
import bmesh
from . import muv_common
def calc_edge_scale(uv_layer, loop0, loop1):
v0 = loop0.vert.co
v1 = loop1.vert.co
uv0 = loop0[uv_layer].uv.copy()
uv1 = loop1[uv_layer].uv.copy()
dv = v1 - v0
duv = uv1 - uv0
scale = 0.0
if dv.magnitude > 0.00000001:
scale = duv.magnitude / dv.magnitude
return scale
def calc_face_scale(uv_layer, face):
es = 0.0
for i, l in enumerate(face.loops[1:]):
es = es + calc_edge_scale(uv_layer, face.loops[i], l)
return es
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):
props = context.scene.muv_props.wsuv
obj = bpy.context.active_object
bm = bmesh.from_edit_mesh(obj.data)
if muv_common.check_version(2, 73, 0) >= 0:
bm.verts.ensure_lookup_table()
bm.edges.ensure_lookup_table()
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()
sel_faces = [f for f in bm.faces if f.select]
# measure average face size
scale = 0.0
for f in sel_faces:
scale = scale + calc_face_scale(uv_layer, f)
props.ref_scale = scale / len(sel_faces)
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'}
def execute(self, context):
props = context.scene.muv_props.wsuv
obj = bpy.context.active_object
bm = bmesh.from_edit_mesh(obj.data)
if muv_common.check_version(2, 73, 0) >= 0:
bm.verts.ensure_lookup_table()
bm.edges.ensure_lookup_table()
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()
sel_faces = [f for f in bm.faces if f.select]
# measure average face size
scale = 0.0
for f in sel_faces:
scale = scale + calc_face_scale(uv_layer, f)
scale = scale / len(sel_faces)
ratio = props.ref_scale / scale
orig_area = bpy.context.area.type
bpy.context.area.type = 'IMAGE_EDITOR'
# apply scaled UV
bpy.ops.transform.resize(
value=(ratio, ratio, ratio),
constraint_axis=(False, False, False),
constraint_orientation='GLOBAL',
mirror=False,
proportional='DISABLED',
proportional_edit_falloff='SMOOTH',
proportional_size=1,
snap=False,
snap_target='CLOSEST',
snap_point=(0, 0, 0),
snap_align=False,
snap_normal=(0, 0, 0),
texture_space=False,
release_confirm=False)
bpy.context.area.type = orig_area
bmesh.update_edit_mesh(obj.data)
return {'FINISHED'}
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