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#! /usr/bin/env python
#######################
# (c) Jan Walter 2000 #
#######################
# CVS
# $Author$
# $Date$
# $RCSfile$
# $Revision$
TAB = " "
vertices = []
vertexNormals = []
faces = []
materials = []
switchMaterial = []
currentMaterial = []
materialIndex = 0
def addVertex(x, y, z):
global vertices
vertices.append([x, y, z])
return len(vertices)
def addVertexNormal(i, j, k):
global vertexNormals
vertexNormals.append([i, j, k])
return len(vertexNormals)
def addFace(vi, ti, ni):
global faces
faces.append([vi, ti, ni])
return len(faces)
def addMaterial(name, Kd, Ks, Ka):
global materials
materials.append([name, Kd, Ks, Ka])
return len(materials)
def findMaterial(name):
global materials
for material in materials:
if material[0] == name:
return material
def setCurrentMaterial(name):
global switchMaterial, faces, currentMaterial
switchMaterial.append(len(faces))
currentMaterial.append(name)
class OpenInventor:
def export(self, filename, useNormals = 1, useMaterials = 1):
global vertices, vertexNormals, faces, materials, switchMaterial
global currentMaterial, materialIndex
file = open(filename, "w")
file.write("#Inventor V2.1 ascii\n\n")
file.write("Separator {\n")
############
# vertices #
############
file.write("%sCoordinate3 {\n" % (TAB, ))
file.write("%spoint [ \n" % (TAB*2, ))
for i in xrange(len(vertices)-1):
x, y, z = vertices[i]
file.write("%s %s %s %s,\n" % (TAB*2, x, y, z))
x, y, z = vertices[i+1]
file.write("%s %s %s %s\n" % (TAB*2, x, y, z))
file.write("%s ] \n" % (TAB*2, ))
file.write("%s}\n" % (TAB, ))
###########
# normals #
###########
if useNormals:
file.write("%sNormal {\n" % (TAB, ))
file.write("%svector [ \n" % (TAB*2, ))
for i in xrange(len(vertexNormals)-1):
x, y, z = vertexNormals[i]
file.write("%s %s %s %s,\n" % (TAB*2, x, y, z))
x, y, z = vertexNormals[i-1]
file.write("%s %s %s %s\n" % (TAB*2, x, y, z))
file.write("%s ] \n" % (TAB*2, ))
file.write("%s}\n" % (TAB, ))
#########
# faces #
#########
switchMaterial.append(len(faces))
for si in xrange(len(switchMaterial) - 1):
i1, i2 = switchMaterial[si], switchMaterial[si+1]
# --------------
# write material
# --------------
if materials:
name = currentMaterial[materialIndex]
material = findMaterial(name)
if useMaterials:
file.write("%sMaterial {\n" % (TAB, ))
file.write("%sambientColor %s %s %s\n" %
(TAB*2,
material[3][0],
material[3][1],
material[3][2]))
file.write("%sdiffuseColor %s %s %s\n" %
(TAB*2,
material[1][0],
material[1][1],
material[1][2]))
file.write("%sspecularColor %s %s %s\n" %
(TAB*2,
material[2][0],
material[2][1],
material[2][2]))
file.write("%s}\n" % (TAB, ))
# -----------
# write faces
# -----------
file.write("%sIndexedFaceSet {\n" % (TAB, ))
# indices for vertices
file.write("%scoordIndex [ \n" % (TAB*2, ))
for i in xrange(i1, i2-1):
indices = faces[i][0]
istring = ""
for index in indices:
# indices begin with 0 in OpenInventor
istring = istring + "%s, " % (index - 1, )
file.write("%s %s-1, \n" % (TAB*2, istring))
indices = faces[i+1][0]
istring = ""
for index in indices:
# indices begin with 0 in OpenInventor
istring = istring + "%s, " % (index - 1, )
file.write("%s %s-1\n" % (TAB*2, istring))
file.write("%s ] \n" % (TAB*2, ))
# update materialIndex
materialIndex = materialIndex + 1
if useNormals:
# indices for normals
file.write("%snormalIndex [ \n" % (TAB*2, ))
for i in xrange(i1, i2-1):
indices = faces[i][2]
istring = ""
for index in indices:
# indices begin with 0 in OpenInventor
istring = istring + "%s, " % (index - 1, )
file.write("%s %s-1, \n" % (TAB*2, istring))
indices = faces[i+1][2]
istring = ""
for index in indices:
# indices begin with 0 in OpenInventor
istring = istring + "%s, " % (index - 1, )
file.write("%s %s-1\n" % (TAB*2, istring))
file.write("%s ] \n" % (TAB*2, ))
file.write("%s}\n" % (TAB, ))
file.write("}\n")
file.close()
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