175 lines
3.9 KiB
Python
175 lines
3.9 KiB
Python
#!BPY
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""" Registration info for Blender menus:
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Name: 'Edges to Curve'
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Blender: 241
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Group: 'Mesh'
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Tip: 'Edges not used by a face are converted into polyline(s)'
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"""
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__author__ = ("Campbell Barton")
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__url__ = ("blender", "elysiun")
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__version__ = "1.0 2006/02/08"
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__bpydoc__ = """\
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Edges to Curves
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This script converts open and closed edge loops into polylines
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Supported:<br>
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Polylines where each vert has no more then 2 edges attached to it.
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"""
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# ***** BEGIN GPL LICENSE BLOCK *****
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#
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# Script copyright (C) Campbell J Barton
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#
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# ***** END GPL LICENCE BLOCK *****
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# --------------------------------------------------------------------------
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from Blender import *
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def edkey(ed):
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i1 = ed.v1.index
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i2 = ed.v2.index
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if i1>i2:
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return (i2,i1), ed
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else:
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return (i1,i2), ed
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def polysFromMesh(me):
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# a polyline is 2
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#polylines are a list
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polyLines = []
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# Get edges not used by a face
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edgeDict= dict([ (ed.key, ed) for ed in me.edges ])
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for f in me.faces:
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for key in f.edge_keys:
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try:
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del edgeDict[key]
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except:
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pass
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edges= edgeDict.values()
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while edges:
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currentEdge= edges.pop()
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startVert= currentEdge.v2
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endVert= currentEdge.v1
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polyLine= [startVert, endVert]
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ok= 1
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while ok:
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ok= 0
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#for i, ed in enumerate(edges):
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i=len(edges)
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while i:
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i-=1
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ed= edges[i]
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if ed.v1 == endVert:
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polyLine.append(ed.v2)
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endVert= polyLine[-1]
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ok=1
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del edges[i]
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#break
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elif ed.v2 == endVert:
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polyLine.append(ed.v1)
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endVert= polyLine[-1]
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ok=1
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del edges[i]
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#break
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elif ed.v1 == startVert:
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polyLine.insert(0, ed.v2)
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startVert= polyLine[0]
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ok=1
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del edges[i]
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#break
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elif ed.v2 == startVert:
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polyLine.insert(0, ed.v1)
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startVert= polyLine[0]
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ok=1
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del edges[i]
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#break
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polyLines.append((polyLine, polyLine[0]==polyLine[-1]))
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# print len(edges), len(polyLines)
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return polyLines
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def mesh2polys():
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scn= Scene.GetCurrent()
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scn.objects.selected = []
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meshOb= scn.objects.active
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if meshOb==None or meshOb.type != 'Mesh':
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Draw.PupMenu( 'ERROR: No Active Mesh Selected, Aborting' )
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return
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Window.WaitCursor(1)
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Window.EditMode(0)
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me = meshOb.getData(mesh=1)
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polygons= polysFromMesh(me)
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w=t=1
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cu= Curve.New()
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cu.name = me.name
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cu.setFlag(1)
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ob = scn.objects.active = scn.objects.new(cu)
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ob.setMatrix(meshOb.matrixWorld)
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i=0
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for poly, closed in polygons:
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if closed:
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vIdx= 1
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else:
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vIdx= 0
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v= poly[vIdx]
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cu.appendNurb([v.co.x, v.co.y, v.co.z, w, t])
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cu[i].type= 0 # Poly Line
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# Close the polyline if its closed.
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if closed:
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cu[i].setFlagU(1)
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# Add all the points in the polyline.
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while vIdx<len(poly):
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v= poly[vIdx]
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cu.appendPoint(i, [v.co.x, v.co.y, v.co.z, w])
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vIdx+=1
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i+=1
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Window.WaitCursor(0)
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# not used as yet.
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"""
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def writepolys():
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me = Scene.GetCurrent().getActiveObject().getData(mesh=1)
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polygons= polysFromMesh(me)
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file=open('/polygons.txt', 'w')
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for ply in polygons:
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file.write('polygon ')
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if ply[1]:
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file.write('closed ')
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else:
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file.write('open ')
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file.write('%i\n' % len(ply[0]))
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for pt in ply[0]:
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file.write('%.6f %.6f %.6f\n' % tuple(pt.co) )
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file.close()
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"""
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if __name__ == '__main__':
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mesh2polys()
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