#   Copyright (C) 2006 - Giorgio Griffon

#   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

#esporta una mesh di blender in stl

import Blender
from Blender import NMesh,Object

########################################
# CAMBIARE QUESTO NOME IN BASE ALLA MESH DA ESPORTARE

nome="Tube"#nome della mesh da esportare
########################################
f=open("blend.stl","w")
f.write("solid "+nome+"\n")

#############################
#questo servirebbe se l'oggetto ha i suoi assi propri
#ruotati rispetto a quelli fissi
#oggetto=Object.Get(nome)
#print oggetto.rot
#############################

mesh=NMesh.GetRaw(nome)

print "##############"
n_tr=0#numero triangoli dell'stl
n_facce=len(mesh.faces)
for i in range(0,n_facce):
	faccia=mesh.faces[i]
	print "faccia "+str(i)
	#print faccia.no
	nx=faccia.no[0]
	ny=faccia.no[1]
	nz=faccia.no[2]
	n_vertici=len(faccia.v)
	if n_vertici>2:#non dovrebbe succedere,ma se capita...
		f.write("facet normal "+str(nx)+" "+str(ny)+" "+str(nz)+"\n")
		f.write("  outer loop")
		for j in range(0,3):
			vertice=faccia.v[j]
			#print "vertice "+str(j)
			f.write("\n    vertex")
			for k in range(0,3):
				#print vertice[k]
				f.write(" "+str(vertice[k]))
		f.write("\n  endloop\n")
		f.write("endfacet\n")
		n_tr=n_tr+1
		if n_vertici>3:
			f.write("facet normal "+str(nx)+" "+str(ny)+" "+str(nz)+"\n")
			f.write("  outer loop")
			for j in [0,2,3]:
				vertice=faccia.v[j]
				#print "vertice "+str(j)
				f.write("\n    vertex")
				for k in range(0,3):
					#print vertice[k]
					f.write(" "+str(vertice[k]))
			f.write("\n  endloop\n")
			f.write("endfacet\n")
			n_tr=n_tr+1


f.write("endsolid\n")
f.close()
print "salvato stl con "+str(n_tr)+" facce triangolari"