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# ##### 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 #####
# --------------------------------- DUAL MESH -------------------------------- #
# -------------------------------- version 0.3 ------------------------------- #
# #
# Convert a generic mesh to its dual. With open meshes it can get some wired #
# effect on the borders. #
# #
# (c) Alessandro Zomparelli #
# (2017) #
# #
# http://www.co-de-it.com/ #
# #
# ############################################################################ #
bl_info = {
"name": "Dual Mesh",
"author": "Alessandro Zomparelli (Co-de-iT)",
"version": (0, 3),
"blender": (2, 7, 8),
"location": "",
"description": "Convert a generic mesh to its dual",
"warning": "",
"wiki_url": "",
"category": "Mesh"}
import bpy
from bpy.types import Operator
from bpy.props import (
BoolProperty,
EnumProperty,
)
import bmesh
class dual_mesh(Operator):
bl_idname = "object.dual_mesh"
bl_label = "Dual Mesh"
bl_description = ("Convert a generic mesh into a polygonal mesh")
bl_options = {'REGISTER', 'UNDO'}
quad_method = EnumProperty(
items=[('BEAUTY', 'Beauty',
'Split the quads in nice triangles, slower method'),
('FIXED', 'Fixed',
'Split the quads on the 1st and 3rd vertices'),
('FIXED_ALTERNATE', 'Fixed Alternate',
'Split the quads on the 2nd and 4th vertices'),
('SHORTEST_DIAGONAL', 'Shortest Diagonal',
'Split the quads based on the distance between the vertices')
],
name="Quad Method",
description="Method for splitting the quads into triangles",
default="FIXED",
options={'LIBRARY_EDITABLE'}
)
polygon_method = EnumProperty(
items=[
('BEAUTY', 'Beauty', 'Arrange the new triangles evenly'),
('CLIP', 'Clip',
'Split the polygons with an ear clipping algorithm')],
name="Polygon Method",
description="Method for splitting the polygons into triangles",
default="BEAUTY",
options={'LIBRARY_EDITABLE'}
)
preserve_borders = BoolProperty(
name="Preserve Borders",
default=True,
description="Preserve original borders"
)
apply_modifiers = BoolProperty(
name="Apply Modifiers",
default=True,
description="Apply object's modifiers"
)
def execute(self, context):
mode = context.mode
if mode == 'EDIT_MESH':
mode = 'EDIT'
act = bpy.context.active_object
if mode != 'OBJECT':
sel = [act]
bpy.ops.object.mode_set(mode='OBJECT')
else:
sel = bpy.context.selected_objects
doneMeshes = []
'''
if self.new_object:
bpy.ops.object.duplicate_move()
for i in range(len(sel)):
bpy.context.selected_objects[i].name = sel[i].name + "_dual"
if sel[i] == act:
bpy.context.scene.objects.active = bpy.context.selected_objects[i]
sel = bpy.context.selected_objects
'''
for ob0 in sel:
if ob0.type != 'MESH':
continue
if ob0.data.name in doneMeshes:
continue
ob = ob0
mesh_name = ob0.data.name
# store linked objects
clones = []
n_users = ob0.data.users
count = 0
for o in bpy.data.objects:
if o.type != 'MESH':
continue
if o.data.name == mesh_name:
count += 1
clones.append(o)
if count == n_users:
break
if self.apply_modifiers:
bpy.ops.object.convert(target='MESH')
ob.data = ob.data.copy()
bpy.ops.object.select_all(action='DESELECT')
ob.select = True
bpy.context.scene.objects.active = ob0
bpy.ops.object.mode_set(mode='EDIT')
# prevent borders erosion
bpy.ops.mesh.select_mode(
use_extend=False, use_expand=False, type='EDGE'
)
bpy.ops.mesh.select_non_manifold(
extend=False, use_wire=False, use_boundary=True,
use_multi_face=False, use_non_contiguous=False,
use_verts=False
)
bpy.ops.mesh.extrude_region_move(
MESH_OT_extrude_region={"mirror": False},
TRANSFORM_OT_translate={"value": (0, 0, 0),
"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), "gpencil_strokes": False,
"texture_space": False, "remove_on_cancel": False,
"release_confirm": False}
)
bpy.ops.mesh.select_mode(
use_extend=False, use_expand=False, type='VERT',
action='TOGGLE'
)
bpy.ops.mesh.select_all(action='SELECT')
bpy.ops.mesh.quads_convert_to_tris(
quad_method=self.quad_method, ngon_method=self.polygon_method
)
bpy.ops.mesh.select_all(action='DESELECT')
bpy.ops.object.mode_set(mode='OBJECT')
bpy.ops.object.modifier_add(type='SUBSURF')
ob.modifiers[-1].name = "dual_mesh_subsurf"
while True:
bpy.ops.object.modifier_move_up(modifier="dual_mesh_subsurf")
if ob.modifiers[0].name == "dual_mesh_subsurf":
break
bpy.ops.object.modifier_apply(
apply_as='DATA', modifier='dual_mesh_subsurf'
)
bpy.ops.object.mode_set(mode='EDIT')
bpy.ops.mesh.select_all(action='DESELECT')
verts = ob.data.vertices
bpy.ops.object.mode_set(mode='OBJECT')
verts[0].select = True
bpy.ops.object.mode_set(mode='EDIT')
bpy.ops.mesh.select_more(use_face_step=False)
bpy.ops.mesh.select_similar(
type='EDGE', compare='EQUAL', threshold=0.01)
bpy.ops.mesh.select_all(action='INVERT')
bpy.ops.mesh.dissolve_verts()
bpy.ops.mesh.select_all(action='DESELECT')
bpy.ops.mesh.select_non_manifold(
extend=False, use_wire=False, use_boundary=True,
use_multi_face=False, use_non_contiguous=False, use_verts=False)
bpy.ops.mesh.select_more()
# find boundaries
bpy.ops.object.mode_set(mode='OBJECT')
bound_v = [v.index for v in ob.data.vertices if v.select]
bound_e = [e.index for e in ob.data.edges if e.select]
bound_p = [p.index for p in ob.data.polygons if p.select]
bpy.ops.object.mode_set(mode='EDIT')
# select quad faces
bpy.context.tool_settings.mesh_select_mode = (False, False, True)
bpy.ops.mesh.select_face_by_sides(number=4, extend=False)
# deselect boundaries
bpy.ops.object.mode_set(mode='OBJECT')
for i in bound_v:
bpy.context.active_object.data.vertices[i].select = False
for i in bound_e:
bpy.context.active_object.data.edges[i].select = False
for i in bound_p:
bpy.context.active_object.data.polygons[i].select = False
bpy.ops.object.mode_set(mode='EDIT')
bpy.context.tool_settings.mesh_select_mode = (False, False, True)
bpy.ops.mesh.edge_face_add()
bpy.context.tool_settings.mesh_select_mode = (True, False, False)
bpy.ops.mesh.select_all(action='DESELECT')
# delete boundaries
bpy.ops.mesh.select_non_manifold(
extend=False, use_wire=True, use_boundary=True,
use_multi_face=False, use_non_contiguous=False, use_verts=True
)
bpy.ops.mesh.delete(type='VERT')
# remove middle vertices
bm = bmesh.from_edit_mesh(ob.data)
for v in bm.verts:
if len(v.link_edges) == 2 and len(v.link_faces) < 3:
v.select_set(True)
# dissolve
bpy.ops.mesh.dissolve_verts()
bpy.ops.mesh.select_all(action='DESELECT')
# remove border faces
if not self.preserve_borders:
bpy.ops.mesh.select_non_manifold(
extend=False, use_wire=False, use_boundary=True,
use_multi_face=False, use_non_contiguous=False, use_verts=False
)
bpy.ops.mesh.select_more()
bpy.ops.mesh.delete(type='FACE')
# clean wires
bpy.ops.mesh.select_non_manifold(
extend=False, use_wire=True, use_boundary=False,
use_multi_face=False, use_non_contiguous=False, use_verts=False
)
bpy.ops.mesh.delete(type='EDGE')
bpy.ops.object.mode_set(mode='OBJECT')
ob0.data.name = mesh_name
doneMeshes.append(mesh_name)
for o in clones:
o.data = ob.data
for o in sel:
o.select = True
bpy.context.scene.objects.active = act
bpy.ops.object.mode_set(mode=mode)
return {'FINISHED'}
"""
class dual_mesh_panel(bpy.types.Panel):
bl_label = "Dual Mesh"
bl_category = "Tools"
bl_space_type = "VIEW_3D"
bl_region_type = "TOOLS"
bl_context = "objectmode"
def draw(self, context):
layout = self.layout
col = layout.column(align=True)
try:
if bpy.context.active_object.type == 'MESH':
col.operator("object.dual_mesh")
except:
pass
"""
def register():
bpy.utils.register_class(dual_mesh)
# bpy.utils.register_class(dual_mesh_panel)
def unregister():
bpy.utils.unregister_class(dual_mesh)
# bpy.utils.unregister_class(dual_mesh_panel)
if __name__ == "__main__":
register()
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