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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/ #
# #
################################################################################
import bpy
import bmesh
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": "",
"tracker_url": "",
"category": "Mesh"}
class dual_mesh(bpy.types.Operator):
bl_idname = "object.dual_mesh"
bl_label = "Dual Mesh"
bl_options = {'REGISTER', 'UNDO'}
bl_description = ("Convert a generic mesh to its dual.")
quad_method = bpy.props.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 = bpy.props.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 = bpy.props.BoolProperty(
name="Preserve Borders", default=True,
description="Preserve original borders")
def execute(self, context):
act = bpy.context.active_object
sel = bpy.context.selected_objects
doneMeshes = []
for ob0 in sel:
if ob0.type != 'MESH': continue
if ob0.data.name in doneMeshes: continue
##ob = bpy.data.objects.new("dual_mesh_wip", ob0.data.copy())
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
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')
if self.preserve_borders:
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"
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')
# 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
return {'FINISHED'}
'''
class dual_mesh_panel(bpy.types.Panel):
bl_label = "Dual Mesh"
bl_category = "Create"
bl_space_type = "VIEW_3D"
bl_region_type = "TOOLS"
bl_context = (("objectmode"))
bl_options = {'DEFAULT_CLOSED'}
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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