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- #!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()
-