Added research data, testing blender mesh generation

src_research_readme/blender_2.43_scripts/mesh_edges2curves.py

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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()