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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
|
#!BPY
"""
Name: 'Wavefront (.obj)...'
Blender: 232
Group: 'Import'
Tooltip: 'Load a Wavefront OBJ File'
"""
# $Id$
#
# --------------------------------------------------------------------------
# OBJ Import v0.9 by Campbell Barton (AKA Ideasman)
# --------------------------------------------------------------------------
# ***** BEGIN GPL LICENSE BLOCK *****
#
# 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 *****
# --------------------------------------------------------------------------
NULL_MAT = '(null)' # Name for mesh's that have no mat set.
MATLIMIT = 16
DIR = ''
#==============================================#
# Return directory, where is file #
#==============================================#
def pathName(path,name):
length=len(path)
for CH in range(1, length):
if path[length-CH:] == name:
path = path[:length-CH]
break
return path
#==============================================#
# Strips the slashes from the back of a string #
#==============================================#
def stripPath(path):
for CH in range(len(path), 0, -1):
if path[CH-1] == "/" or path[CH-1] == "\\":
path = path[CH:]
break
return path
#====================================================#
# Strips the prefix off the name before writing #
#====================================================#
def stripName(name): # name is a string
prefixDelimiter = '.'
return name[ : name.find(prefixDelimiter) ]
#===============================#
# Join list items into a string #
#===============================#
def join(joinList):
joinedString = ""
for listItem in joinList:
joinedString = joinedString + ' ' + str(listItem)
# Remove the first space
joinedString = joinedString[1:]
return joinedString
from Blender import *
#==================================================================================#
# This gets a mat or creates one of the requested name if none exist. #
#==================================================================================#
def getMat(matName):
# Make a new mat
try:
return Material.Get(matName)
except:
return Material.New(matName)
#==================================================================================#
# This function sets textures defined in .mtl file #
#==================================================================================#
def load_image(mat, img_fileName, type, mesh):
try:
image = Image.Load(img_fileName)
except:
print "unable to open", img_fileName
return
texture = Texture.New(type)
texture.setType('Image')
texture.image = image
# adds textures to faces (Textured/Alt-Z mode)
for f in mesh.faces:
if mesh.materials[f.mat].name == mat.name:
f.image = image
# adds textures for materials (rendering)
if type == 'Ka':
mat.setTexture(0, texture, Texture.TexCo.UV, Texture.MapTo.CMIR)
if type == 'Kd':
mat.setTexture(1, texture, Texture.TexCo.UV, Texture.MapTo.COL)
if type == 'Ks':
mat.setTexture(2, texture, Texture.TexCo.UV, Texture.MapTo.SPEC)
#==================================================================================#
# This function loads materials from .mtl file (have to be defined in obj file) #
#==================================================================================#
def load_mtl(dir, mtl_file, mesh):
mtl_fileName = dir + mtl_file
try:
fileLines= open(mtl_fileName, 'r').readlines()
except:
print "unable to open", mtl_fileName
return
lIdx=0
while lIdx < len(fileLines):
l = fileLines[lIdx].split()
# Detect a line that will be ignored
if len(l) == 0:
pass
elif l[0] == '#' or len(l) == 0:
pass
elif l[0] == 'newmtl':
currentMat = getMat(join(l[1:]))
elif l[0] == 'Ka':
currentMat.setMirCol(eval(l[1]), eval(l[2]), eval(l[3]))
elif l[0] == 'Kd':
currentMat.setRGBCol(eval(l[1]), eval(l[2]), eval(l[3]))
elif l[0] == 'Ks':
currentMat.setSpecCol(eval(l[1]), eval(l[2]), eval(l[3]))
elif l[0] == 'Ns':
currentMat.setEmit(eval(l[1])/100.0)
elif l[0] == 'd':
currentMat.setAlpha(eval(l[1]))
elif l[0] == 'Tr':
currentMat.setAlpha(eval(l[1]))
elif l[0] == 'map_Ka':
img_fileName = dir + l[1]
load_image(currentMat, img_fileName, 'Ka', mesh)
elif l[0] == 'map_Kd':
img_fileName = dir + l[1]
load_image(currentMat, img_fileName, 'Kd', mesh)
elif l[0] == 'map_Ks':
img_fileName = dir + l[1]
load_image(currentMat, img_fileName, 'Ks', mesh)
lIdx+=1
#==================================================================================#
# This loads data from .obj file #
#==================================================================================#
def load_obj(file):
def applyMat(mesh, f, mat):
# Check weather the 16 mat limit has been met.
if len( mesh.materials ) >= MATLIMIT:
print 'Warning, max material limit reached, using an existing material'
return mesh, f
mIdx = 0
for m in mesh.materials:
if m.getName() == mat.getName():
break
mIdx+=1
if mIdx == len(mesh.materials):
mesh.addMaterial(mat)
f.mat = mIdx
return mesh, f
# Get the file name with no path or .obj
fileName = stripName( stripPath(file) )
mtl_fileName = ''
DIR = pathName(file, stripPath(file))
fileLines = open(file, 'r').readlines()
mesh = NMesh.GetRaw() # new empty mesh
objectName = 'mesh' # If we cant get one, use this
uvMapList = [] # store tuple uv pairs here
nullMat = getMat(NULL_MAT)
currentMat = nullMat # Use this mat.
# Main loop
lIdx = 0
while lIdx < len(fileLines):
l = fileLines[lIdx].split()
# Detect a line that will be idnored
if len(l) == 0:
pass
elif l[0] == '#' or len(l) == 0:
pass
# VERTEX
elif l[0] == 'v':
# This is a new vert, make a new mesh
mesh.verts.append( NMesh.Vert(eval(l[1]), eval(l[2]), eval(l[3]) ) )
elif l[0] == 'vn':
pass
elif l[0] == 'vt':
# This is a new vert, make a new mesh
uvMapList.append( (eval(l[1]), eval(l[2])) )
elif l[0] == 'f':
# Make a face with the correct material.
f = NMesh.Face()
mesh, f = applyMat(mesh, f, currentMat)
# Set up vIdxLs : Verts
# Set up vtIdxLs : UV
vIdxLs = []
vtIdxLs = []
for v in l[1:]:
#objVert = split( v, ['/'] )
objVert = v.split('/', -1)
# VERT INDEX
vIdxLs.append(eval(objVert[0]) -1)
# UV
if len(objVert) == 1:
vtIdxLs.append(eval(objVert[0]) -1) # Sticky UV coords
else:
vtIdxLs.append(eval(objVert[1]) -1) # Seperate UV coords
# Quads only, we could import quads using the method below but it polite to import a quad as a quad.f
if len(vIdxLs) == 4:
f.v.append(mesh.verts[vIdxLs[0]])
f.v.append(mesh.verts[vIdxLs[1]])
f.v.append(mesh.verts[vIdxLs[2]])
f.v.append(mesh.verts[vIdxLs[3]])
# UV MAPPING
if uvMapList:
if vtIdxLs[0] < len(uvMapList):
f.uv.append( uvMapList[ vtIdxLs[0] ] )
if vtIdxLs[1] < len(uvMapList):
f.uv.append( uvMapList[ vtIdxLs[1] ] )
if vtIdxLs[2] < len(uvMapList):
f.uv.append( uvMapList[ vtIdxLs[2] ] )
if vtIdxLs[3] < len(uvMapList):
f.uv.append( uvMapList[ vtIdxLs[3] ] )
mesh.faces.append(f) # move the face onto the mesh
elif len(vIdxLs) >= 3: # This handles tri's and fans
for i in range(len(vIdxLs)-2):
f = NMesh.Face()
mesh, f = applyMat(mesh, f, currentMat)
f.v.append(mesh.verts[vIdxLs[0]])
f.v.append(mesh.verts[vIdxLs[i+1]])
f.v.append(mesh.verts[vIdxLs[i+2]])
# UV MAPPING
if uvMapList:
if vtIdxLs[0] < len(uvMapList):
f.uv.append( uvMapList[ vtIdxLs[0] ] )
if vtIdxLs[1] < len(uvMapList):
f.uv.append( uvMapList[ vtIdxLs[i+1] ] )
if vtIdxLs[2] < len(uvMapList):
f.uv.append( uvMapList[ vtIdxLs[i+2] ] )
mesh.faces.append(f) # move the face onto the mesh
# is o the only vert/face delimeter?
# if not we could be screwed.
elif l[0] == 'o':
# Make sure the objects is worth puttong
if len(mesh.verts) > 0:
NMesh.PutRaw(mesh, fileName + '_' + objectName)
# Make new mesh
mesh = NMesh.GetRaw()
# New mesh name
objectName = join(l[1:]) # Use join in case of spaces
# New texture list
uvMapList = []
elif l[0] == 'usemtl':
if l[1] == '(null)':
currentMat = getMat(NULL_MAT)
else:
currentMat = getMat(join(l[1:])) # Use join in case of spaces
elif l[0] == 'mtllib':
mtl_fileName = l[1]
lIdx+=1
# Some material stuff
if mtl_fileName != '':
load_mtl(DIR, mtl_fileName, mesh)
# We need to do this to put the last object.
# All other objects will be put alredy
if len(mesh.verts) > 0:
NMesh.PutRaw(mesh, fileName + '_' + objectName)
Window.FileSelector(load_obj, 'Import OBJ')
|