167 lines
4.0 KiB
Python
167 lines
4.0 KiB
Python
#!BPY
|
|
""" Registration info for Blender menus:
|
|
Name: 'Edges to Curve'
|
|
Blender: 241
|
|
Group: 'Mesh'
|
|
Tip: 'Edges not used by a face are converted into polyline(s)'
|
|
"""
|
|
__author__ = ("Campbell Barton")
|
|
__url__ = ("blender", "blenderartists.org")
|
|
__version__ = "1.0 2006/02/08"
|
|
|
|
__bpydoc__ = """\
|
|
Edges to Curves
|
|
|
|
This script converts open and closed edge loops into curve polylines
|
|
|
|
Supported:<br>
|
|
Polylines where each vert has no more then 2 edges attached to it.
|
|
"""
|
|
|
|
# ***** BEGIN GPL LICENSE BLOCK *****
|
|
#
|
|
# Script copyright (C) Campbell J Barton
|
|
#
|
|
# 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
#
|
|
# ***** END GPL LICENCE BLOCK *****
|
|
# --------------------------------------------------------------------------
|
|
|
|
from Blender import *
|
|
|
|
def polysFromMesh(me):
|
|
# a polyline is 2
|
|
#polylines are a list
|
|
polyLines = []
|
|
|
|
# Get edges not used by a face
|
|
edgeDict= dict([ (ed.key, ed) for ed in me.edges ])
|
|
for f in me.faces:
|
|
for key in f.edge_keys:
|
|
try:
|
|
del edgeDict[key]
|
|
except:
|
|
pass
|
|
|
|
edges= edgeDict.values()
|
|
|
|
|
|
while edges:
|
|
currentEdge= edges.pop()
|
|
startVert= currentEdge.v2
|
|
endVert= currentEdge.v1
|
|
polyLine= [startVert, endVert]
|
|
ok= 1
|
|
while ok:
|
|
ok= 0
|
|
#for i, ed in enumerate(edges):
|
|
i=len(edges)
|
|
while i:
|
|
i-=1
|
|
ed= edges[i]
|
|
if ed.v1 == endVert:
|
|
polyLine.append(ed.v2)
|
|
endVert= polyLine[-1]
|
|
ok=1
|
|
del edges[i]
|
|
#break
|
|
elif ed.v2 == endVert:
|
|
polyLine.append(ed.v1)
|
|
endVert= polyLine[-1]
|
|
ok=1
|
|
del edges[i]
|
|
#break
|
|
elif ed.v1 == startVert:
|
|
polyLine.insert(0, ed.v2)
|
|
startVert= polyLine[0]
|
|
ok=1
|
|
del edges[i]
|
|
#break
|
|
elif ed.v2 == startVert:
|
|
polyLine.insert(0, ed.v1)
|
|
startVert= polyLine[0]
|
|
ok=1
|
|
del edges[i]
|
|
#break
|
|
polyLines.append((polyLine, polyLine[0]==polyLine[-1]))
|
|
# print len(edges), len(polyLines)
|
|
return polyLines
|
|
|
|
|
|
def mesh2polys():
|
|
scn= Scene.GetCurrent()
|
|
scn.objects.selected = []
|
|
|
|
meshOb= scn.objects.active
|
|
if meshOb==None or meshOb.type != 'Mesh':
|
|
Draw.PupMenu( 'ERROR: No Active Mesh Selected, Aborting' )
|
|
return
|
|
Window.WaitCursor(1)
|
|
Window.EditMode(0)
|
|
me = meshOb.getData(mesh=1)
|
|
polygons= polysFromMesh(me)
|
|
w = 1.0
|
|
cu= Curve.New()
|
|
cu.name = me.name
|
|
cu.setFlag(1)
|
|
|
|
ob = scn.objects.active = scn.objects.new(cu)
|
|
ob.setMatrix(meshOb.matrixWorld)
|
|
|
|
i=0
|
|
for poly, closed in polygons:
|
|
if closed:
|
|
vIdx= 1
|
|
else:
|
|
vIdx= 0
|
|
|
|
v= poly[vIdx]
|
|
cu.appendNurb((v.co.x, v.co.y, v.co.z, w))
|
|
vIdx += 1
|
|
cu[i].type= 0 # Poly Line
|
|
|
|
# Close the polyline if its closed.
|
|
if closed:
|
|
cu[i].setFlagU(1)
|
|
|
|
# Add all the points in the polyline.
|
|
while vIdx<len(poly):
|
|
v= poly[vIdx]
|
|
cu.appendPoint(i, (v.co.x, v.co.y, v.co.z, w))
|
|
vIdx+=1
|
|
i+=1
|
|
Window.WaitCursor(0)
|
|
|
|
# not used as yet.
|
|
"""
|
|
def writepolys():
|
|
me = Scene.GetCurrent().getActiveObject().getData(mesh=1)
|
|
polygons= polysFromMesh(me)
|
|
file=open('/polygons.txt', 'w')
|
|
for ply in polygons:
|
|
file.write('polygon ')
|
|
if ply[1]:
|
|
file.write('closed ')
|
|
else:
|
|
file.write('open ')
|
|
file.write('%i\n' % len(ply[0]))
|
|
for pt in ply[0]:
|
|
file.write('%.6f %.6f %.6f\n' % tuple(pt.co) )
|
|
file.close()
|
|
"""
|
|
|
|
if __name__ == '__main__':
|
|
mesh2polys()
|