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node_SeparateMesh.py
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node_SeparateMesh.py
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from node_s import *
from util import *
import collections
class SvSeparateMeshNode(Node, SverchCustomTreeNode):
'''Separate Loose mesh parts'''
bl_idname = 'SvSeparateMeshNode'
bl_label = 'Separate Loose'
bl_icon = 'OUTLINER_OB_EMPTY'
def init(self, context):
self.inputs.new('VerticesSocket', 'Vertices', 'Vertices')
self.inputs.new('StringsSocket', 'Poly Egde', 'Poly Edge')
self.outputs.new('VerticesSocket', 'Vertices', 'Vertices')
self.outputs.new('StringsSocket', 'Poly Egde', 'Poly Egde')
def update(self):
if not 'Poly Egde' in self.outputs:
return
if not any((self.outputs[0].links,self.outputs[1].links)):
return
if self.inputs['Vertices'].links and self.inputs['Poly Egde'].links:
verts = SvGetSocketAnyType(self,self.inputs['Vertices'])
poly = SvGetSocketAnyType(self,self.inputs['Poly Egde'])
verts_out = []
poly_edge_out = []
for ve,pe in zip(verts,poly):
# build links
node_links = {}
for edge_face in pe:
for i in edge_face:
if not i in node_links:
node_links[i]=set()
s=node_links[i]
node_links[i]=s.union(edge_face)
nodes=set(node_links.keys())
n= nodes.pop()
node_set_list = [set([n])]
node_stack = collections.deque()
# find separate sets
while nodes:
for node in node_links[n]:
if not node in node_set_list[-1]:
node_stack.append(node)
if not node_stack: # new mesh part
n=nodes.pop()
node_set_list.append(set([n]))
else:
while node_stack and n in node_set_list[-1]:
n = node_stack.pop()
nodes.discard(n)
node_set_list[-1].add(n)
# create new meshes from sets
if len(node_set_list)>1:
for node_set in node_set_list:
mesh_index = sorted(node_set)
vert_dict = {j:i for i,j in enumerate(mesh_index)}
new_vert = [ve[i] for i in mesh_index]
new_pe=filter(lambda x:x[0] in node_set,pe)
new_pe= [list(map(lambda n:vert_dict[n],fe)) for fe in new_pe]
verts_out.append(new_vert)
poly_edge_out.append(new_pe)
elif node_set_list: #no reprocessing needed
verts_out.append(ve)
poly_edge_out.append(pe)
if 'Vertices' in self.outputs and self.outputs['Vertices'].links:
SvSetSocketAnyType(self, 'Vertices',verts_out)
if 'Poly Egde' in self.outputs and self.outputs['Poly Egde'].links:
if poly_edge_out:
SvSetSocketAnyType(self,'Poly Egde',poly_edge_out)
def update_socket(self, context):
self.update()
def register():
bpy.utils.register_class(SvSeparateMeshNode)
def unregister():
bpy.utils.unregister_class(SvSeparateMeshNode)
if __name__ == "__main__":
register()