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voronoi_on_mesh.py
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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 #####
import bpy
from bpy.props import FloatProperty, EnumProperty, BoolProperty, IntProperty
from sverchok.node_tree import SverchCustomTreeNode
from sverchok.data_structure import updateNode, zip_long_repeat, ensure_nesting_level, get_data_nesting_level,\
ensure_min_nesting
from sverchok.utils.sv_bmesh_utils import recalc_normals
from sverchok.utils.sv_mesh_utils import mesh_join
from sverchok.utils.voronoi3d import voronoi_on_mesh
class SvVoronoiOnMeshNode(SverchCustomTreeNode, bpy.types.Node):
"""
Triggers: Voronoi Mesh
Tooltip: Generate Voronoi diagram on the surface of a mesh object
"""
bl_idname = 'SvVoronoiOnMeshNode'
bl_label = 'Voronoi on Mesh'
bl_icon = 'OUTLINER_OB_EMPTY'
sv_icon = 'SV_VORONOI'
sv_dependencies = {'scipy'}
modes = [
('VOLUME', "Split Volume", "Split volume of the mesh into regions of Voronoi diagram", 0),
('SURFACE', "Split Surface", "Split the surface of the mesh into regions of Vornoi diagram", 1),
#('RIDGES', "Ridges near Surface", "Generate ridges of 3D Voronoi diagram near the surface of the mesh", 2),
#('REGIONS', "Regions near Surface", "Generate regions of 3D Voronoi diagram near the surface of the mesh", 3)
]
spacing : FloatProperty(
name = "Spacing",
default = 0.0,
min = 0.0,
description="Percent of space to leave between generated fragment meshes",
update=updateNode)
normals : BoolProperty(
name = "Correct normals",
default = True,
description="Make sure that all normals of generated meshes point outside",
update = updateNode)
def update_sockets(self, context):
self.inputs['Spacing'].hide_safe = self.mode not in {'VOLUME', 'SURFACE'}
updateNode(self, context)
mode : EnumProperty(
name = "Mode",
items = modes,
default = 'VOLUME',
update = update_sockets)
join_modes = [
('FLAT', "Flat list", "Output a single flat list of mesh objects (Voronoi diagram ridges / regions) for all input meshes", 0),
('SEPARATE', "Separate lists", "Output a separate list of mesh objects (Voronoi diagram ridges / regions) for each input mesh", 1),
('JOIN', "Join meshes", "Output one mesh, joined from ridges / edges of Voronoi diagram, for each input mesh", 2)
]
join_mode : EnumProperty(
name = "Output mode",
items = join_modes,
default = 'FLAT',
update = updateNode)
accuracy : IntProperty(
name = "Accuracy",
description = "Accuracy for mesh bisecting procedure",
default = 6,
min = 1,
update = updateNode)
def sv_init(self, context):
self.inputs.new('SvVerticesSocket', 'Vertices')
self.inputs.new('SvStringsSocket', 'Faces')
self.inputs.new('SvVerticesSocket', "Sites")
# self.inputs.new('SvStringsSocket', 'Thickness').prop_name = 'thickness'
self.inputs.new('SvStringsSocket', 'Spacing').prop_name = 'spacing'
self.outputs.new('SvVerticesSocket', "Vertices")
self.outputs.new('SvStringsSocket', "Edges")
self.outputs.new('SvStringsSocket', "Faces")
#self.outputs.new('SvVerticesSocket', "AllSites")
self.update_sockets(context)
def draw_buttons(self, context, layout):
layout.label(text="Mode:")
layout.prop(self, "mode", text='')
if self.mode == 'VOLUME':
layout.prop(self, 'normals')
layout.label(text='Output nesting:')
layout.prop(self, 'join_mode', text='')
def draw_buttons_ext(self, context, layout):
self.draw_buttons(context, layout)
layout.prop(self, 'accuracy')
def process(self):
if not any(socket.is_linked for socket in self.outputs):
return
verts_in = self.inputs['Vertices'].sv_get(deepcopy=False)
faces_in = self.inputs['Faces'].sv_get(deepcopy=False)
sites_in = self.inputs['Sites'].sv_get(deepcopy=False)
#thickness_in = self.inputs['Thickness'].sv_get()
spacing_in = self.inputs['Spacing'].sv_get(deepcopy=False)
verts_in = ensure_nesting_level(verts_in, 4)
input_level = get_data_nesting_level(sites_in)
sites_in = ensure_nesting_level(sites_in, 4)
faces_in = ensure_nesting_level(faces_in, 4)
#thickness_in = ensure_nesting_level(thickness_in, 2)
spacing_in = ensure_min_nesting(spacing_in, 2)
nested_output = input_level > 3
precision = 10 ** (-self.accuracy)
verts_out = []
edges_out = []
faces_out = []
sites_out = []
for params in zip_long_repeat(verts_in, faces_in, sites_in, spacing_in):
new_verts = []
new_edges = []
new_faces = []
new_sites = []
for verts, faces, sites, spacing in zip_long_repeat(*params):
verts, edges, faces, sites = voronoi_on_mesh(verts, faces, sites, thickness=0,
spacing = spacing,
#clip_inner = self.clip_inner, clip_outer = self.clip_outer,
do_clip=True, clipping=None,
mode = self.mode,
normal_update = self.normals,
precision = precision)
if self.join_mode == 'FLAT':
new_verts.extend(verts)
new_edges.extend(edges)
new_faces.extend(faces)
new_sites.extend(sites)
elif self.join_mode == 'SEPARATE':
new_verts.append(verts)
new_edges.append(edges)
new_faces.append(faces)
new_sites.append(sites)
else: # JOIN
verts, edges, faces = mesh_join(verts, edges, faces)
new_verts.append(verts)
new_edges.append(edges)
new_faces.append(faces)
new_sites.append(sites)
if nested_output:
verts_out.append(new_verts)
edges_out.append(new_edges)
faces_out.append(new_faces)
sites_out.append(new_sites)
else:
verts_out.extend(new_verts)
edges_out.extend(new_edges)
faces_out.extend(new_faces)
sites_out.extend(new_sites)
self.outputs['Vertices'].sv_set(verts_out)
self.outputs['Edges'].sv_set(edges_out)
self.outputs['Faces'].sv_set(faces_out)
#self.outputs['AllSites'].sv_set(sites_out)
def register():
bpy.utils.register_class(SvVoronoiOnMeshNode)
def unregister():
bpy.utils.unregister_class(SvVoronoiOnMeshNode)