-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathconvert_obj_three.py
executable file
·1604 lines (1234 loc) · 46.9 KB
/
convert_obj_three.py
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
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
"""Convert Wavefront OBJ / MTL files into Three.js (JSON model version, to be used with ascii / binary loader)
-------------------------
How to use this converter
-------------------------
python convert_obj_three.py -i infile.obj -o outfile.js [-m "morphfiles*.obj"] [-c "morphcolors*.obj"] [-a center|centerxz|top|bottom|none] [-s smooth|flat] [-t ascii|binary] [-d invert|normal] [-b] [-e]
Notes:
- flags
-i infile.obj input OBJ file
-o outfile.js output JS file
-m "morphfiles*.obj" morph OBJ files (can use wildcards, enclosed in quotes multiple patterns separate by space)
-c "morphcolors*.obj" morph colors OBJ files (can use wildcards, enclosed in quotes multiple patterns separate by space)
-a center|centerxz|top|bottom|none model alignment
-s smooth|flat smooth = export vertex normals, flat = no normals (face normals computed in loader)
-t ascii|binary export ascii or binary format (ascii has more features, binary just supports vertices, faces, normals, uvs and materials)
-b bake material colors into face colors
-x 10.0 scale and truncate
-f 2 morph frame sampling step
- by default:
use smooth shading (if there were vertex normals in the original model)
will be in ASCII format
no face colors baking
no scale and truncate
morph frame step = 1 (all files will be processed)
- binary conversion will create two files:
outfile.js (materials)
outfile.bin (binary buffers)
--------------------------------------------------
How to use generated JS file in your HTML document
--------------------------------------------------
<script type="text/javascript" src="Three.js"></script>
...
<script type="text/javascript">
...
// load ascii model
var jsonLoader = new THREE.JSONLoader();
jsonLoader.load( "Model_ascii.js", createScene );
// load binary model
var binLoader = new THREE.BinaryLoader();
binLoader.load( "Model_bin.js", createScene );
function createScene( geometry, materials ) {
var mesh = new THREE.Mesh( geometry, new THREE.MultiMaterial( materials ) );
}
...
</script>
-------------------------------------
Parsers based on formats descriptions
-------------------------------------
http://en.wikipedia.org/wiki/Obj
http://en.wikipedia.org/wiki/Material_Template_Library
-------------------
Current limitations
-------------------
- for the moment, only diffuse color and texture are used
(will need to extend shaders / renderers / materials in Three)
- texture coordinates can be wrong in canvas renderer
(there is crude normalization, but it doesn't
work for all cases)
- smoothing can be turned on/off only for the whole mesh
----------------------------------------------
How to get proper OBJ + MTL files with Blender
----------------------------------------------
0. Remove default cube (press DEL and ENTER)
1. Import / create model
2. Select all meshes (Select -> Select All by Type -> Mesh)
3. Export to OBJ (File -> Export -> Wavefront .obj)
- enable following options in exporter
Material Groups
Rotate X90
Apply Modifiers
High Quality Normals
Copy Images
Selection Only
Objects as OBJ Objects
UVs
Normals
Materials
- select empty folder
- give your exported file name with "obj" extension
- click on "Export OBJ" button
4. Your model is now all files in this folder (OBJ, MTL, number of images)
- this converter assumes all files staying in the same folder,
(OBJ / MTL files use relative paths)
- for WebGL, textures must be power of 2 sized
------
Author
------
AlteredQualia http://alteredqualia.com
"""
import fileinput
import operator
import random
import os.path
import getopt
import sys
import struct
import math
import glob
# #####################################################
# Configuration
# #####################################################
ALIGN = "none" # center centerxz bottom top none
SHADING = "smooth" # smooth flat
TYPE = "ascii" # ascii binary
TRUNCATE = False
SCALE = 1.0
FRAMESTEP = 1
BAKE_COLORS = False
# default colors for debugging (each material gets one distinct color):
# white, red, green, blue, yellow, cyan, magenta
COLORS = [0xeeeeee, 0xee0000, 0x00ee00, 0x0000ee, 0xeeee00, 0x00eeee, 0xee00ee]
# #####################################################
# Templates
# #####################################################
TEMPLATE_FILE_ASCII = u"""\
{
"metadata" :
{
"formatVersion" : 3.1,
"sourceFile" : "%(fname)s",
"generatedBy" : "OBJConverter",
"vertices" : %(nvertex)d,
"faces" : %(nface)d,
"normals" : %(nnormal)d,
"colors" : %(ncolor)d,
"uvs" : %(nuv)d,
"materials" : %(nmaterial)d
},
"scale" : %(scale)f,
"materials": [%(materials)s],
"vertices": [%(vertices)s],
"morphTargets": [%(morphTargets)s],
"morphColors": [%(morphColors)s],
"normals": [%(normals)s],
"colors": [%(colors)s],
"uvs": [[%(uvs)s]],
"faces": [%(faces)s]
}
"""
TEMPLATE_FILE_BIN = u"""\
{
"metadata" :
{
"formatVersion" : 3.1,
"sourceFile" : "%(fname)s",
"generatedBy" : "OBJConverter",
"vertices" : %(nvertex)d,
"faces" : %(nface)d,
"normals" : %(nnormal)d,
"uvs" : %(nuv)d,
"materials" : %(nmaterial)d
},
"materials": [%(materials)s],
"buffers": "%(buffers)s"
}
"""
TEMPLATE_VERTEX = "%f,%f,%f"
TEMPLATE_VERTEX_TRUNCATE = "%d,%d,%d"
TEMPLATE_N = "%.5g,%.5g,%.5g"
TEMPLATE_UV = "%.5g,%.5g"
TEMPLATE_COLOR = "%.3g,%.3g,%.3g"
TEMPLATE_COLOR_DEC = "%d"
TEMPLATE_MORPH_VERTICES = '\t{ "name": "%s", "vertices": [%s] }'
TEMPLATE_MORPH_COLORS = '\t{ "name": "%s", "colors": [%s] }'
# #####################################################
# Utils
# #####################################################
def file_exists(filename):
"""Return true if file exists and is accessible for reading.
Should be safer than just testing for existence due to links and
permissions magic on Unix filesystems.
@rtype: boolean
"""
try:
f = open(filename, 'r')
f.close()
return True
except IOError:
return False
def get_name(fname):
"""Create model name based of filename ("path/fname.js" -> "fname").
"""
return os.path.splitext(os.path.basename(fname))[0]
def bbox(vertices):
"""Compute bounding box of vertex array.
"""
if len(vertices)>0:
minx = maxx = vertices[0][0]
miny = maxy = vertices[0][1]
minz = maxz = vertices[0][2]
for v in vertices[1:]:
if v[0]<minx:
minx = v[0]
elif v[0]>maxx:
maxx = v[0]
if v[1]<miny:
miny = v[1]
elif v[1]>maxy:
maxy = v[1]
if v[2]<minz:
minz = v[2]
elif v[2]>maxz:
maxz = v[2]
return { 'x':[minx,maxx], 'y':[miny,maxy], 'z':[minz,maxz] }
else:
return { 'x':[0,0], 'y':[0,0], 'z':[0,0] }
def translate(vertices, t):
"""Translate array of vertices by vector t.
"""
for i in xrange(len(vertices)):
vertices[i][0] += t[0]
vertices[i][1] += t[1]
vertices[i][2] += t[2]
def center(vertices):
"""Center model (middle of bounding box).
"""
bb = bbox(vertices)
cx = bb['x'][0] + (bb['x'][1] - bb['x'][0])/2.0
cy = bb['y'][0] + (bb['y'][1] - bb['y'][0])/2.0
cz = bb['z'][0] + (bb['z'][1] - bb['z'][0])/2.0
translate(vertices, [-cx,-cy,-cz])
def top(vertices):
"""Align top of the model with the floor (Y-axis) and center it around X and Z.
"""
bb = bbox(vertices)
cx = bb['x'][0] + (bb['x'][1] - bb['x'][0])/2.0
cy = bb['y'][1]
cz = bb['z'][0] + (bb['z'][1] - bb['z'][0])/2.0
translate(vertices, [-cx,-cy,-cz])
def bottom(vertices):
"""Align bottom of the model with the floor (Y-axis) and center it around X and Z.
"""
bb = bbox(vertices)
cx = bb['x'][0] + (bb['x'][1] - bb['x'][0])/2.0
cy = bb['y'][0]
cz = bb['z'][0] + (bb['z'][1] - bb['z'][0])/2.0
translate(vertices, [-cx,-cy,-cz])
def centerxz(vertices):
"""Center model around X and Z.
"""
bb = bbox(vertices)
cx = bb['x'][0] + (bb['x'][1] - bb['x'][0])/2.0
cy = 0
cz = bb['z'][0] + (bb['z'][1] - bb['z'][0])/2.0
translate(vertices, [-cx,-cy,-cz])
def normalize(v):
"""Normalize 3d vector"""
l = math.sqrt(v[0]*v[0] + v[1]*v[1] + v[2]*v[2])
if l:
v[0] /= l
v[1] /= l
v[2] /= l
def veckey3(v):
return round(v[0], 6), round(v[1], 6), round(v[2], 6)
# #####################################################
# MTL parser
# #####################################################
def texture_relative_path(fullpath):
texture_file = os.path.basename(fullpath.replace("\\", "/"))
return texture_file
def parse_mtl(fname):
"""Parse MTL file.
"""
materials = {}
previous_line = ""
for line in fileinput.input(fname):
line = previous_line + line
if line[-2:-1] == '\\':
previous_line = line[:-2]
continue
previous_line = ""
# Only split once initially for single-parameter tags that might have additional spaces in
# their values (i.e. "newmtl Material with spaces").
chunks = line.split(None, 1)
if len(chunks) > 0:
if len(chunks) > 1:
chunks[1] = chunks[1].strip()
# Material start
# newmtl identifier
if chunks[0] == "newmtl":
if len(chunks) > 1:
identifier = chunks[1]
else:
identifier = ""
if not identifier in materials:
materials[identifier] = {}
# Diffuse texture
# map_Kd texture_diffuse.jpg
if chunks[0] == "map_Kd" and len(chunks) == 2:
materials[identifier]["mapDiffuse"] = texture_relative_path(chunks[1])
# Specular texture
# map_Ks texture_specular.jpg
if chunks[0] == "map_Ks" and len(chunks) == 2:
materials[identifier]["mapSpecular"] = texture_relative_path(chunks[1])
# Alpha texture
# map_d texture_alpha.png
if chunks[0] == "map_d" and len(chunks) == 2:
materials[identifier]["transparent"] = True
materials[identifier]["mapAlpha"] = texture_relative_path(chunks[1])
# Bump texture
# map_bump texture_bump.jpg or bump texture_bump.jpg
if (chunks[0] == "map_bump" or chunks[0] == "bump") and len(chunks) == 2:
materials[identifier]["mapBump"] = texture_relative_path(chunks[1])
# Split the remaining parameters.
if len(chunks) > 1:
chunks = [chunks[0]] + chunks[1].split()
# Diffuse color
# Kd 1.000 1.000 1.000
if chunks[0] == "Kd" and len(chunks) == 4:
materials[identifier]["colorDiffuse"] = [float(chunks[1]), float(chunks[2]), float(chunks[3])]
# Specular color
# Ks 1.000 1.000 1.000
if chunks[0] == "Ks" and len(chunks) == 4:
materials[identifier]["colorSpecular"] = [float(chunks[1]), float(chunks[2]), float(chunks[3])]
# Specular coefficient
# Ns 154.000
if chunks[0] == "Ns" and len(chunks) == 2:
materials[identifier]["specularCoef"] = float(chunks[1])
# Dissolves
# d 0.9
if chunks[0] == "d" and len(chunks) == 2:
materials[identifier]["opacity"] = float(chunks[1])
if materials[identifier]["opacity"] < 1.0:
materials[identifier]["transparent"] = True
# Transparency
# Tr 0.1
if chunks[0] == "Tr" and len(chunks) == 2:
materials[identifier]["opacity"] = 1.0 - float(chunks[1])
if materials[identifier]["opacity"] < 1.0:
materials[identifier]["transparent"] = True
# Optical density
# Ni 1.0
if chunks[0] == "Ni" and len(chunks) == 2:
materials[identifier]["opticalDensity"] = float(chunks[1])
# Illumination
# illum 2
#
# 0. Color on and Ambient off
# 1. Color on and Ambient on
# 2. Highlight on
# 3. Reflection on and Ray trace on
# 4. Transparency: Glass on, Reflection: Ray trace on
# 5. Reflection: Fresnel on and Ray trace on
# 6. Transparency: Refraction on, Reflection: Fresnel off and Ray trace on
# 7. Transparency: Refraction on, Reflection: Fresnel on and Ray trace on
# 8. Reflection on and Ray trace off
# 9. Transparency: Glass on, Reflection: Ray trace off
# 10. Casts shadows onto invisible surfaces
if chunks[0] == "illum" and len(chunks) == 2:
materials[identifier]["illumination"] = int(chunks[1])
return materials
# #####################################################
# OBJ parser
# #####################################################
def parse_vertex(text):
"""Parse text chunk specifying single vertex.
Possible formats:
vertex index
vertex index / texture index
vertex index / texture index / normal index
vertex index / / normal index
"""
v = 0
t = 0
n = 0
chunks = text.split("/")
v = int(chunks[0])
if len(chunks) > 1:
if chunks[1]:
t = int(chunks[1])
if len(chunks) > 2:
if chunks[2]:
n = int(chunks[2])
return { 'v':v, 't':t, 'n':n }
def parse_obj(fname):
"""Parse OBJ file.
"""
vertices = []
normals = []
uvs = []
faces = []
materials = {}
material = ""
mcounter = 0
mcurrent = 0
mtllib = ""
# current face state
group = 0
object = 0
smooth = 0
previous_line = ""
for line in fileinput.input(fname):
line = previous_line + line
if line[-2:-1] == '\\':
previous_line = line[:-2]
continue
previous_line = ""
# Only split once initially for single-parameter tags that might have additional spaces in
# their values (i.e. "usemtl Material with spaces").
chunks = line.split(None, 1)
if len(chunks) > 0:
if len(chunks) > 1:
chunks[1] = chunks[1].strip()
# Group
if chunks[0] == "g" and len(chunks) == 2:
group = chunks[1]
# Object
if chunks[0] == "o" and len(chunks) == 2:
object = chunks[1]
# Materials definition
if chunks[0] == "mtllib" and len(chunks) == 2:
mtllib = chunks[1]
# Material
if chunks[0] == "usemtl":
if len(chunks) > 1:
material = chunks[1]
else:
material = ""
if not material in materials:
mcurrent = mcounter
materials[material] = mcounter
mcounter += 1
else:
mcurrent = materials[material]
# Split the remaining parameters.
if len(chunks) > 1:
chunks = [chunks[0]] + chunks[1].split()
# Vertices as (x,y,z) coordinates
# v 0.123 0.234 0.345
if chunks[0] == "v" and len(chunks) == 4:
x = float(chunks[1])
y = float(chunks[2])
z = float(chunks[3])
vertices.append([x,y,z])
# Normals in (x,y,z) form; normals might not be unit
# vn 0.707 0.000 0.707
if chunks[0] == "vn" and len(chunks) == 4:
x = float(chunks[1])
y = float(chunks[2])
z = float(chunks[3])
normals.append([x,y,z])
# Texture coordinates in (u,v[,w]) coordinates, w is optional
# vt 0.500 -1.352 [0.234]
if chunks[0] == "vt" and len(chunks) >= 3:
u = float(chunks[1])
v = float(chunks[2])
w = 0
if len(chunks)>3:
w = float(chunks[3])
uvs.append([u,v,w])
# Face
if chunks[0] == "f" and len(chunks) >= 4:
vertex_index = []
uv_index = []
normal_index = []
# Precompute vert / normal / uv lists
# for negative index lookup
vertlen = len(vertices) + 1
normlen = len(normals) + 1
uvlen = len(uvs) + 1
for v in chunks[1:]:
vertex = parse_vertex(v)
if vertex['v']:
if vertex['v'] < 0:
vertex['v'] += vertlen
vertex_index.append(vertex['v'])
if vertex['t']:
if vertex['t'] < 0:
vertex['t'] += uvlen
uv_index.append(vertex['t'])
if vertex['n']:
if vertex['n'] < 0:
vertex['n'] += normlen
normal_index.append(vertex['n'])
faces.append({
'vertex':vertex_index,
'uv':uv_index,
'normal':normal_index,
'material':mcurrent,
'group':group,
'object':object,
'smooth':smooth,
})
# Smooth shading
if chunks[0] == "s" and len(chunks) == 2:
smooth = chunks[1]
return faces, vertices, uvs, normals, materials, mtllib
# #####################################################
# Generator - faces
# #####################################################
def setBit(value, position, on):
if on:
mask = 1 << position
return (value | mask)
else:
mask = ~(1 << position)
return (value & mask)
def generate_face(f, fc):
isTriangle = ( len(f['vertex']) == 3 )
if isTriangle:
nVertices = 3
else:
nVertices = 4
hasMaterial = True # for the moment OBJs without materials get default material
hasFaceUvs = False # not supported in OBJ
hasFaceVertexUvs = ( len(f['uv']) >= nVertices )
hasFaceNormals = False # don't export any face normals (as they are computed in engine)
hasFaceVertexNormals = ( len(f["normal"]) >= nVertices and SHADING == "smooth" )
hasFaceColors = BAKE_COLORS
hasFaceVertexColors = False # not supported in OBJ
faceType = 0
faceType = setBit(faceType, 0, not isTriangle)
faceType = setBit(faceType, 1, hasMaterial)
faceType = setBit(faceType, 2, hasFaceUvs)
faceType = setBit(faceType, 3, hasFaceVertexUvs)
faceType = setBit(faceType, 4, hasFaceNormals)
faceType = setBit(faceType, 5, hasFaceVertexNormals)
faceType = setBit(faceType, 6, hasFaceColors)
faceType = setBit(faceType, 7, hasFaceVertexColors)
faceData = []
# order is important, must match order in JSONLoader
# face type
# vertex indices
# material index
# face uvs index
# face vertex uvs indices
# face normal index
# face vertex normals indices
# face color index
# face vertex colors indices
faceData.append(faceType)
# must clamp in case on polygons bigger than quads
for i in xrange(nVertices):
index = f['vertex'][i] - 1
faceData.append(index)
faceData.append( f['material'] )
if hasFaceVertexUvs:
for i in xrange(nVertices):
index = f['uv'][i] - 1
faceData.append(index)
if hasFaceVertexNormals:
for i in xrange(nVertices):
index = f['normal'][i] - 1
faceData.append(index)
if hasFaceColors:
index = fc['material']
faceData.append(index)
return ",".join( map(str, faceData) )
# #####################################################
# Generator - chunks
# #####################################################
def hexcolor(c):
return ( int(c[0] * 255) << 16 ) + ( int(c[1] * 255) << 8 ) + int(c[2] * 255)
def generate_vertex(v, option_vertices_truncate, scale):
if not option_vertices_truncate:
return TEMPLATE_VERTEX % (v[0], v[1], v[2])
else:
return TEMPLATE_VERTEX_TRUNCATE % (scale * v[0], scale * v[1], scale * v[2])
def generate_normal(n):
return TEMPLATE_N % (n[0], n[1], n[2])
def generate_uv(uv):
return TEMPLATE_UV % (uv[0], uv[1])
def generate_color_rgb(c):
return TEMPLATE_COLOR % (c[0], c[1], c[2])
def generate_color_decimal(c):
return TEMPLATE_COLOR_DEC % hexcolor(c)
# #####################################################
# Morphs
# #####################################################
def generate_morph_vertex(name, vertices):
vertex_string = ",".join(generate_vertex(v, TRUNCATE, SCALE) for v in vertices)
return TEMPLATE_MORPH_VERTICES % (name, vertex_string)
def generate_morph_color(name, colors):
color_string = ",".join(generate_color_rgb(c) for c in colors)
return TEMPLATE_MORPH_COLORS % (name, color_string)
def extract_material_colors(materials, mtlfilename, basename):
"""Extract diffuse colors from MTL materials
"""
if not materials:
materials = { 'default': 0 }
mtl = create_materials(materials, mtlfilename, basename)
mtlColorArraySrt = []
for m in mtl:
if m in materials:
index = materials[m]
color = mtl[m].get("colorDiffuse", [1,0,0])
mtlColorArraySrt.append([index, color])
mtlColorArraySrt.sort()
mtlColorArray = [x[1] for x in mtlColorArraySrt]
return mtlColorArray
def extract_face_colors(faces, material_colors):
"""Extract colors from materials and assign them to faces
"""
faceColors = []
for face in faces:
material_index = face['material']
faceColors.append(material_colors[material_index])
return faceColors
def generate_morph_targets(morphfiles, n_vertices, infile):
skipOriginalMorph = False
norminfile = os.path.normpath(infile)
morphVertexData = []
for mfilepattern in morphfiles.split():
matches = glob.glob(mfilepattern)
matches.sort()
indices = range(0, len(matches), FRAMESTEP)
for i in indices:
path = matches[i]
normpath = os.path.normpath(path)
if normpath != norminfile or not skipOriginalMorph:
name = os.path.basename(normpath)
morphFaces, morphVertices, morphUvs, morphNormals, morphMaterials, morphMtllib = parse_obj(normpath)
n_morph_vertices = len(morphVertices)
if n_vertices != n_morph_vertices:
print "WARNING: skipping morph [%s] with different number of vertices [%d] than the original model [%d]" % (name, n_morph_vertices, n_vertices)
else:
if ALIGN == "center":
center(morphVertices)
elif ALIGN == "centerxz":
centerxz(morphVertices)
elif ALIGN == "bottom":
bottom(morphVertices)
elif ALIGN == "top":
top(morphVertices)
morphVertexData.append((get_name(name), morphVertices))
print "adding [%s] with %d vertices" % (name, n_morph_vertices)
morphTargets = ""
if len(morphVertexData):
morphTargets = "\n%s\n\t" % ",\n".join(generate_morph_vertex(name, vertices) for name, vertices in morphVertexData)
return morphTargets
def generate_morph_colors(colorfiles, n_vertices, n_faces):
morphColorData = []
colorFaces = []
materialColors = []
for mfilepattern in colorfiles.split():
matches = glob.glob(mfilepattern)
matches.sort()
for path in matches:
normpath = os.path.normpath(path)
name = os.path.basename(normpath)
morphFaces, morphVertices, morphUvs, morphNormals, morphMaterials, morphMtllib = parse_obj(normpath)
n_morph_vertices = len(morphVertices)
n_morph_faces = len(morphFaces)
if n_vertices != n_morph_vertices:
print "WARNING: skipping morph color map [%s] with different number of vertices [%d] than the original model [%d]" % (name, n_morph_vertices, n_vertices)
elif n_faces != n_morph_faces:
print "WARNING: skipping morph color map [%s] with different number of faces [%d] than the original model [%d]" % (name, n_morph_faces, n_faces)
else:
morphMaterialColors = extract_material_colors(morphMaterials, morphMtllib, normpath)
morphFaceColors = extract_face_colors(morphFaces, morphMaterialColors)
morphColorData.append((get_name(name), morphFaceColors))
# take first color map for baking into face colors
if len(colorFaces) == 0:
colorFaces = morphFaces
materialColors = morphMaterialColors
print "adding [%s] with %d face colors" % (name, len(morphFaceColors))
morphColors = ""
if len(morphColorData):
morphColors = "\n%s\n\t" % ",\n".join(generate_morph_color(name, colors) for name, colors in morphColorData)
return morphColors, colorFaces, materialColors
# #####################################################
# Materials
# #####################################################
def generate_color(i):
"""Generate hex color corresponding to integer.
Colors should have well defined ordering.
First N colors are hardcoded, then colors are random
(must seed random number generator with deterministic value
before getting colors).
"""
if i < len(COLORS):
#return "0x%06x" % COLORS[i]
return COLORS[i]
else:
#return "0x%06x" % int(0xffffff * random.random())
return int(0xffffff * random.random())
def value2string(v):
if type(v)==str and v[0:2] != "0x":
return '"%s"' % v
elif type(v) == bool:
return str(v).lower()
return str(v)
def generate_materials(mtl, materials):
"""Generate JS array of materials objects
JS material objects are basically prettified one-to-one
mappings of MTL properties in JSON format.
"""
mtl_array = []
for m in mtl:
if m in materials:
index = materials[m]
# add debug information
# materials should be sorted according to how
# they appeared in OBJ file (for the first time)
# this index is identifier used in face definitions
mtl[m]['DbgName'] = m
mtl[m]['DbgIndex'] = index
mtl[m]['DbgColor'] = generate_color(index)
if BAKE_COLORS:
mtl[m]['vertexColors'] = "face"
mtl_raw = ",\n".join(['\t"%s" : %s' % (n, value2string(v)) for n,v in sorted(mtl[m].items())])
mtl_string = "\t{\n%s\n\t}" % mtl_raw
mtl_array.append([index, mtl_string])
return ",\n\n".join([m for i,m in sorted(mtl_array)])
def generate_mtl(materials):
"""Generate dummy materials (if there is no MTL file).
"""
mtl = {}
for m in materials:
index = materials[m]
mtl[m] = {
'DbgName': m,
'DbgIndex': index,
'DbgColor': generate_color(index)
}
return mtl
def generate_materials_string(materials, mtlfilename, basename):
"""Generate final materials string.
"""
if not materials:
materials = { 'default': 0 }
mtl = create_materials(materials, mtlfilename, basename)
return generate_materials(mtl, materials)
def create_materials(materials, mtlfilename, basename):
"""Parse MTL file and create mapping between its materials and OBJ materials.
Eventual edge cases are handled here (missing materials, missing MTL file).
"""
random.seed(42) # to get well defined color order for debug colors
# default materials with debug colors for when
# there is no specified MTL / MTL loading failed,
# or if there were no materials / null materials
mtl = generate_mtl(materials)
if mtlfilename:
# create full pathname for MTL (included from OBJ)
path = os.path.dirname(basename)
fname = os.path.join(path, mtlfilename)
if file_exists(fname):
# override default materials with real ones from MTL
# (where they exist, otherwise keep defaults)
mtl.update(parse_mtl(fname))
else:
print "Couldn't find [%s]" % fname
return mtl
# #####################################################
# Faces
# #####################################################
def is_triangle_flat(f):
return len(f['vertex'])==3 and not (f["normal"] and SHADING == "smooth") and not f['uv']
def is_triangle_flat_uv(f):
return len(f['vertex'])==3 and not (f["normal"] and SHADING == "smooth") and len(f['uv'])==3
def is_triangle_smooth(f):
return len(f['vertex'])==3 and f["normal"] and SHADING == "smooth" and not f['uv']
def is_triangle_smooth_uv(f):
return len(f['vertex'])==3 and f["normal"] and SHADING == "smooth" and len(f['uv'])==3