1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
#! /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()
|