337 lines
13 KiB
Python
337 lines
13 KiB
Python
# SPDX-License-Identifier: GPL-2.0-or-later
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# --------------------------------- DUAL MESH -------------------------------- #
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# -------------------------------- version 0.3 ------------------------------- #
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# #
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# Convert a generic mesh to its dual. With open meshes it can get some wired #
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# effect on the borders. #
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# #
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# (c) Alessandro Zomparelli #
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# (2017) #
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# #
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# http://www.co-de-it.com/ #
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# #
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# ############################################################################ #
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import bpy
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from bpy.types import Operator
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from bpy.props import (
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BoolProperty,
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EnumProperty,
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)
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import bmesh
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from .utils import *
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class dual_mesh_tessellated(Operator):
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bl_idname = "object.dual_mesh_tessellated"
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bl_label = "Dual Mesh"
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bl_description = ("Generate a polygonal mesh using Tessellate. (Non-destructive)")
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bl_options = {'REGISTER', 'UNDO'}
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apply_modifiers : BoolProperty(
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name="Apply Modifiers",
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default=True,
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description="Apply object's modifiers"
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)
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source_faces : EnumProperty(
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items=[
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('QUAD', 'Quad Faces', ''),
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('TRI', 'Triangles', '')],
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name="Source Faces",
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description="Triangles works with any geometry." \
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"Quad option is faster when the object has only Quads",
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default="TRI",
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options={'LIBRARY_EDITABLE'}
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)
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link_component : BoolProperty(
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name="Editable Component",
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default=False,
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description="Add Component Object to the Scene"
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)
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def execute(self, context):
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auto_layer_collection()
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ob0 = context.object
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name1 = "DualMesh_{}_Component".format(self.source_faces)
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# Generate component
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if self.source_faces == 'QUAD':
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verts = [(1.0, 0.0, 0.0), (0.5, 0.0, 0.0),
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(0.0, 0.0, 0.0), (0.0, 0.5, 0.0),
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(0.0, 1.0, 0.0), (0.5, 1.0, 0.0),
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(1.0, 1.0, 0.0), (1.0, 0.5, 0.0),
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(2/3, 1/3, 0.0), (1/3, 2/3, 0.0)]
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edges = [(0,1), (1,2), (2,3), (3,4), (4,5), (5,6), (6,7),
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(7,0), (1,8), (8,7), (3,9), (9,5), (8,9)]
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faces = [(7,8,1,0), (8,9,3,2,1), (9,5,4,3), (9,8,7,6,5)]
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else:
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verts = [(0.0, 0.0, 0.0), (1.0, 0.0, 0.0),
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(0.0, 1.0, 0.0), (1.0, 1.0, 0.0),
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(0.5, 1/3, 0.0), (0.0, 0.5, 0.0),
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(1.0, 0.5, 0.0), (0.5, 0.0, 0.0)]
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edges = [(0,5), (1,7), (3,6), (2,3), (2,5), (1,6), (0,7),
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(4,5), (4,7), (4,6)]
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faces = [(5,0,7,4), (7,1,6,4), (3,2,5,4,6)]
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# check pre-existing component
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try:
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_verts = [0]*len(verts)*3
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__verts = [c for co in verts for c in co]
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ob1 = bpy.data.objects[name1]
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ob1.data.vertices.foreach_get("co",_verts)
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for a, b in zip(_verts, __verts):
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if abs(a-b) > 0.0001:
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raise ValueError
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except:
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me = bpy.data.meshes.new("Dual-Mesh") # add a new mesh
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me.from_pydata(verts, edges, faces)
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me.update(calc_edges=True, calc_edges_loose=True)
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if self.source_faces == 'QUAD': seams = (0,1,2,3,4,5,6,9)
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else: seams = (0,1,2,3,4,5,7)
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for i in seams: me.edges[i].use_seam = True
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ob1 = bpy.data.objects.new(name1, me)
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# fix visualization issue
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if self.link_component:
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context.collection.objects.link(ob1)
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context.view_layer.objects.active = ob1
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ob1.select_set(True)
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bpy.ops.object.editmode_toggle()
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bpy.ops.object.editmode_toggle()
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ob1.select_set(False)
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ob1.hide_render = True
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ob = convert_object_to_mesh(ob0,False,False)
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ob.name = 'DualMesh'
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ob.tissue.tissue_type = 'TESSELLATE'
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ob.tissue.bool_lock = True
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ob.tissue_tessellate.component = ob1
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ob.tissue_tessellate.generator = ob0
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ob.tissue_tessellate.gen_modifiers = self.apply_modifiers
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ob.tissue_tessellate.merge = True
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ob.tissue_tessellate.bool_dissolve_seams = True
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if self.source_faces == 'TRI': ob.tissue_tessellate.fill_mode = 'TRI'
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bpy.ops.object.tissue_update_tessellate()
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ob.tissue.bool_lock = False
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ob.location = ob0.location
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ob.matrix_world = ob0.matrix_world
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return {'FINISHED'}
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def invoke(self, context, event):
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return context.window_manager.invoke_props_dialog(self)
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class dual_mesh(Operator):
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bl_idname = "object.dual_mesh"
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bl_label = "Convert to Dual Mesh"
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bl_description = ("Convert a generic mesh into a polygonal mesh. (Destructive)")
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bl_options = {'REGISTER', 'UNDO'}
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quad_method : EnumProperty(
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items=[('BEAUTY', 'Beauty',
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'Split the quads in nice triangles, slower method'),
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('FIXED', 'Fixed',
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'Split the quads on the 1st and 3rd vertices'),
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('FIXED_ALTERNATE', 'Fixed Alternate',
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'Split the quads on the 2nd and 4th vertices'),
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('SHORTEST_DIAGONAL', 'Shortest Diagonal',
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'Split the quads based on the distance between the vertices')
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],
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name="Quad Method",
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description="Method for splitting the quads into triangles",
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default="FIXED",
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options={'LIBRARY_EDITABLE'}
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)
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polygon_method : EnumProperty(
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items=[
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('BEAUTY', 'Beauty', 'Arrange the new triangles evenly'),
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('CLIP', 'Clip',
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'Split the N-gon with an ear clipping algorithm')],
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name="N-gon Method",
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description="Method for splitting the N-gons into triangles",
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default="BEAUTY",
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options={'LIBRARY_EDITABLE'}
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)
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preserve_borders : BoolProperty(
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name="Preserve Borders",
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default=True,
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description="Preserve original borders"
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)
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apply_modifiers : BoolProperty(
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name="Apply Modifiers",
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default=True,
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description="Apply object's modifiers"
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)
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def execute(self, context):
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mode = context.mode
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if mode == 'EDIT_MESH':
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mode = 'EDIT'
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act = context.active_object
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if mode != 'OBJECT':
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sel = [act]
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bpy.ops.object.mode_set(mode='OBJECT')
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else:
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sel = context.selected_objects
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doneMeshes = []
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for ob0 in sel:
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if ob0.type != 'MESH':
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continue
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if ob0.data.name in doneMeshes:
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continue
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ob = ob0
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mesh_name = ob0.data.name
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# store linked objects
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clones = []
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n_users = ob0.data.users
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count = 0
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for o in bpy.data.objects:
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if o.type != 'MESH':
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continue
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if o.data.name == mesh_name:
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count += 1
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clones.append(o)
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if count == n_users:
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break
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if self.apply_modifiers:
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bpy.ops.object.convert(target='MESH')
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ob.data = ob.data.copy()
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bpy.ops.object.select_all(action='DESELECT')
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ob.select_set(True)
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context.view_layer.objects.active = ob0
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bpy.ops.object.mode_set(mode='EDIT')
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# prevent borders erosion
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bpy.ops.mesh.select_mode(
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use_extend=False, use_expand=False, type='EDGE'
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)
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bpy.ops.mesh.select_non_manifold(
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extend=False, use_wire=False, use_boundary=True,
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use_multi_face=False, use_non_contiguous=False,
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use_verts=False
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)
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bpy.ops.mesh.extrude_region_move(
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MESH_OT_extrude_region={"mirror": False},
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TRANSFORM_OT_translate={"value": (0, 0, 0)}
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)
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bpy.ops.mesh.select_mode(
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use_extend=False, use_expand=False, type='VERT',
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action='TOGGLE'
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)
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bpy.ops.mesh.select_all(action='SELECT')
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bpy.ops.mesh.quads_convert_to_tris(
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quad_method=self.quad_method, ngon_method=self.polygon_method
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)
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bpy.ops.mesh.select_all(action='DESELECT')
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bpy.ops.object.mode_set(mode='OBJECT')
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bpy.ops.object.modifier_add(type='SUBSURF')
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ob.modifiers[-1].name = "dual_mesh_subsurf"
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while True:
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bpy.ops.object.modifier_move_up(modifier="dual_mesh_subsurf")
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if ob.modifiers[0].name == "dual_mesh_subsurf":
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break
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bpy.ops.object.modifier_apply(modifier='dual_mesh_subsurf')
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bpy.ops.object.mode_set(mode='EDIT')
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bpy.ops.mesh.select_all(action='DESELECT')
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verts = ob.data.vertices
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bpy.ops.object.mode_set(mode='OBJECT')
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verts[-1].select = True
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bpy.ops.object.mode_set(mode='EDIT')
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bpy.ops.mesh.select_more(use_face_step=False)
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bpy.ops.mesh.select_similar(
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type='EDGE', compare='EQUAL', threshold=0.01)
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bpy.ops.mesh.select_all(action='INVERT')
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bpy.ops.mesh.dissolve_verts()
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bpy.ops.mesh.select_all(action='DESELECT')
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bpy.ops.mesh.select_non_manifold(
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extend=False, use_wire=False, use_boundary=True,
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use_multi_face=False, use_non_contiguous=False, use_verts=False)
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bpy.ops.mesh.select_more()
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# find boundaries
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bpy.ops.object.mode_set(mode='OBJECT')
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bound_v = [v.index for v in ob.data.vertices if v.select]
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bound_e = [e.index for e in ob.data.edges if e.select]
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bound_p = [p.index for p in ob.data.polygons if p.select]
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bpy.ops.object.mode_set(mode='EDIT')
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# select quad faces
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context.tool_settings.mesh_select_mode = (False, False, True)
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bpy.ops.mesh.select_face_by_sides(number=4, extend=False)
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# deselect boundaries
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bpy.ops.object.mode_set(mode='OBJECT')
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for i in bound_v:
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context.active_object.data.vertices[i].select = False
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for i in bound_e:
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context.active_object.data.edges[i].select = False
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for i in bound_p:
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context.active_object.data.polygons[i].select = False
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bpy.ops.object.mode_set(mode='EDIT')
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context.tool_settings.mesh_select_mode = (False, False, True)
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bpy.ops.mesh.edge_face_add()
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context.tool_settings.mesh_select_mode = (True, False, False)
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bpy.ops.mesh.select_all(action='DESELECT')
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# delete boundaries
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bpy.ops.mesh.select_non_manifold(
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extend=False, use_wire=True, use_boundary=True,
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use_multi_face=False, use_non_contiguous=False, use_verts=True
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)
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bpy.ops.mesh.delete(type='VERT')
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# remove middle vertices
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bm = bmesh.from_edit_mesh(ob.data)
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for v in bm.verts:
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if len(v.link_edges) == 2 and len(v.link_faces) < 3:
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v.select = True
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# dissolve
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bpy.ops.mesh.dissolve_verts()
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bpy.ops.mesh.select_all(action='DESELECT')
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# remove border faces
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if not self.preserve_borders:
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bpy.ops.mesh.select_non_manifold(
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extend=False, use_wire=False, use_boundary=True,
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use_multi_face=False, use_non_contiguous=False, use_verts=False
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)
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bpy.ops.mesh.select_more()
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bpy.ops.mesh.delete(type='FACE')
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# clean wires
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bpy.ops.mesh.select_non_manifold(
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extend=False, use_wire=True, use_boundary=False,
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use_multi_face=False, use_non_contiguous=False, use_verts=False
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)
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bpy.ops.mesh.delete(type='EDGE')
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bpy.ops.object.mode_set(mode='OBJECT')
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ob0.data.name = mesh_name
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doneMeshes.append(mesh_name)
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for o in clones:
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o.data = ob.data
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bm.free()
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for o in sel:
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o.select_set(True)
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context.view_layer.objects.active = act
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bpy.ops.object.mode_set(mode=mode)
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return {'FINISHED'}
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