mirrored from https://projects.blender.org/blender/blender-addons.git
-
Notifications
You must be signed in to change notification settings - Fork 187
/
export_obj.py
790 lines (654 loc) · 34 KB
/
export_obj.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
# ##### 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####
# <pep8 compliant>
import os
import bpy
from mathutils import Matrix, Vector, Color
from bpy_extras import io_utils, node_shader_utils
from bpy_extras.wm_utils.progress_report import (
ProgressReport,
ProgressReportSubstep,
)
def name_compat(name):
if name is None:
return 'None'
else:
return name.replace(' ', '_')
def mesh_triangulate(me):
import bmesh
bm = bmesh.new()
bm.from_mesh(me)
bmesh.ops.triangulate(bm, faces=bm.faces)
bm.to_mesh(me)
bm.free()
def write_mtl(scene, filepath, path_mode, copy_set, mtl_dict):
source_dir = os.path.dirname(bpy.data.filepath)
dest_dir = os.path.dirname(filepath)
with open(filepath, "w", encoding="utf8", newline="\n") as f:
fw = f.write
fw('# Blender MTL File: %r\n' % (os.path.basename(bpy.data.filepath) or "None"))
fw('# Material Count: %i\n' % len(mtl_dict))
mtl_dict_values = list(mtl_dict.values())
mtl_dict_values.sort(key=lambda m: m[0])
# Write material/image combinations we have used.
# Using mtl_dict.values() directly gives un-predictable order.
for mtl_mat_name, mat in mtl_dict_values:
# Get the Blender data for the material and the image.
# Having an image named None will make a bug, dont do it :)
fw('\nnewmtl %s\n' % mtl_mat_name) # Define a new material: matname_imgname
mat_wrap = node_shader_utils.PrincipledBSDFWrapper(mat) if mat else None
if mat_wrap:
use_mirror = mat_wrap.metallic != 0.0
use_transparency = mat_wrap.alpha != 1.0
# XXX Totally empirical conversion, trying to adapt it
# (from 1.0 - 0.0 Principled BSDF range to 0.0 - 900.0 OBJ specular exponent range)...
spec = (1.0 - mat_wrap.roughness) * 30
spec *= spec
fw('Ns %.6f\n' % spec)
# Ambient
if use_mirror:
fw('Ka %.6f %.6f %.6f\n' % (mat_wrap.metallic, mat_wrap.metallic, mat_wrap.metallic))
else:
fw('Ka %.6f %.6f %.6f\n' % (1.0, 1.0, 1.0))
fw('Kd %.6f %.6f %.6f\n' % mat_wrap.base_color[:3]) # Diffuse
# XXX TODO Find a way to handle tint and diffuse color, in a consistent way with import...
fw('Ks %.6f %.6f %.6f\n' % (mat_wrap.specular, mat_wrap.specular, mat_wrap.specular)) # Specular
# Emission, not in original MTL standard but seems pretty common, see T45766.
fw('Ke %.6f %.6f %.6f\n' % mat_wrap.emission_color[:3])
fw('Ni %.6f\n' % mat_wrap.ior) # Refraction index
fw('d %.6f\n' % mat_wrap.alpha) # Alpha (obj uses 'd' for dissolve)
# See http://en.wikipedia.org/wiki/Wavefront_.obj_file for whole list of values...
# Note that mapping is rather fuzzy sometimes, trying to do our best here.
if mat_wrap.specular == 0:
fw('illum 1\n') # no specular.
elif use_mirror:
if use_transparency:
fw('illum 6\n') # Reflection, Transparency, Ray trace
else:
fw('illum 3\n') # Reflection and Ray trace
elif use_transparency:
fw('illum 9\n') # 'Glass' transparency and no Ray trace reflection... fuzzy matching, but...
else:
fw('illum 2\n') # light normally
#### And now, the image textures...
image_map = {
"map_Kd": "base_color_texture",
"map_Ka": None, # ambient...
"map_Ks": "specular_texture",
"map_Ns": "roughness_texture",
"map_d": "alpha_texture",
"map_Tr": None, # transmission roughness?
"map_Bump": "normalmap_texture",
"disp": None, # displacement...
"refl": "metallic_texture",
"map_Ke": "emission_color_texture",
}
for key, mat_wrap_key in sorted(image_map.items()):
if mat_wrap_key is None:
continue
tex_wrap = getattr(mat_wrap, mat_wrap_key, None)
if tex_wrap is None:
continue
image = tex_wrap.image
if image is None:
continue
filepath = io_utils.path_reference(image.filepath, source_dir, dest_dir,
path_mode, "", copy_set, image.library)
options = []
if key == "map_Bump":
if mat_wrap.normalmap_strength != 1.0:
options.append('-bm %.6f' % mat_wrap.normalmap_strength)
if tex_wrap.translation != Vector((0.0, 0.0, 0.0)):
options.append('-o %.6f %.6f %.6f' % tex_wrap.translation[:])
if tex_wrap.scale != Vector((1.0, 1.0, 1.0)):
options.append('-s %.6f %.6f %.6f' % tex_wrap.scale[:])
if options:
fw('%s %s %s\n' % (key, " ".join(options), repr(filepath)[1:-1]))
else:
fw('%s %s\n' % (key, repr(filepath)[1:-1]))
else:
# Write a dummy material here?
fw('Ns 500\n')
fw('Ka 0.8 0.8 0.8\n')
fw('Kd 0.8 0.8 0.8\n')
fw('Ks 0.8 0.8 0.8\n')
fw('d 1\n') # No alpha
fw('illum 2\n') # light normally
def test_nurbs_compat(ob):
if ob.type != 'CURVE':
return False
for nu in ob.data.splines:
if nu.point_count_v == 1 and nu.type != 'BEZIER': # not a surface and not bezier
return True
return False
def write_nurb(fw, ob, ob_mat):
tot_verts = 0
cu = ob.data
# use negative indices
for nu in cu.splines:
if nu.type == 'POLY':
DEG_ORDER_U = 1
else:
DEG_ORDER_U = nu.order_u - 1 # odd but tested to be correct
if nu.type == 'BEZIER':
print("\tWarning, bezier curve:", ob.name, "only poly and nurbs curves supported")
continue
if nu.point_count_v > 1:
print("\tWarning, surface:", ob.name, "only poly and nurbs curves supported")
continue
if len(nu.points) <= DEG_ORDER_U:
print("\tWarning, order_u is lower then vert count, skipping:", ob.name)
continue
pt_num = 0
do_closed = nu.use_cyclic_u
do_endpoints = (do_closed == 0) and nu.use_endpoint_u
for pt in nu.points:
fw('v %.6f %.6f %.6f\n' % (ob_mat @ pt.co.to_3d())[:])
pt_num += 1
tot_verts += pt_num
fw('g %s\n' % (name_compat(ob.name))) # name_compat(ob.getData(1)) could use the data name too
fw('cstype bspline\n') # not ideal, hard coded
fw('deg %d\n' % DEG_ORDER_U) # not used for curves but most files have it still
curve_ls = [-(i + 1) for i in range(pt_num)]
# 'curv' keyword
if do_closed:
if DEG_ORDER_U == 1:
pt_num += 1
curve_ls.append(-1)
else:
pt_num += DEG_ORDER_U
curve_ls = curve_ls + curve_ls[0:DEG_ORDER_U]
fw('curv 0.0 1.0 %s\n' % (" ".join([str(i) for i in curve_ls]))) # Blender has no U and V values for the curve
# 'parm' keyword
tot_parm = (DEG_ORDER_U + 1) + pt_num
tot_parm_div = float(tot_parm - 1)
parm_ls = [(i / tot_parm_div) for i in range(tot_parm)]
if do_endpoints: # end points, force param
for i in range(DEG_ORDER_U + 1):
parm_ls[i] = 0.0
parm_ls[-(1 + i)] = 1.0
fw("parm u %s\n" % " ".join(["%.6f" % i for i in parm_ls]))
fw('end\n')
return tot_verts
def write_file(filepath, objects, depsgraph, scene,
EXPORT_TRI=False,
EXPORT_EDGES=False,
EXPORT_SMOOTH_GROUPS=False,
EXPORT_SMOOTH_GROUPS_BITFLAGS=False,
EXPORT_NORMALS=False,
EXPORT_UV=True,
EXPORT_MTL=True,
EXPORT_APPLY_MODIFIERS=True,
EXPORT_APPLY_MODIFIERS_RENDER=False,
EXPORT_BLEN_OBS=True,
EXPORT_GROUP_BY_OB=False,
EXPORT_GROUP_BY_MAT=False,
EXPORT_KEEP_VERT_ORDER=False,
EXPORT_POLYGROUPS=False,
EXPORT_CURVE_AS_NURBS=True,
EXPORT_GLOBAL_MATRIX=None,
EXPORT_PATH_MODE='AUTO',
progress=ProgressReport(),
):
"""
Basic write function. The context and options must be already set
This can be accessed externaly
eg.
write( 'c:\\test\\foobar.obj', Blender.Object.GetSelected() ) # Using default options.
"""
if EXPORT_GLOBAL_MATRIX is None:
EXPORT_GLOBAL_MATRIX = Matrix()
def veckey3d(v):
return round(v.x, 4), round(v.y, 4), round(v.z, 4)
def veckey2d(v):
return round(v[0], 4), round(v[1], 4)
def findVertexGroupName(face, vWeightMap):
"""
Searches the vertexDict to see what groups is assigned to a given face.
We use a frequency system in order to sort out the name because a given vertex can
belong to two or more groups at the same time. To find the right name for the face
we list all the possible vertex group names with their frequency and then sort by
frequency in descend order. The top element is the one shared by the highest number
of vertices is the face's group
"""
weightDict = {}
for vert_index in face.vertices:
vWeights = vWeightMap[vert_index]
for vGroupName, weight in vWeights:
weightDict[vGroupName] = weightDict.get(vGroupName, 0.0) + weight
if weightDict:
return max((weight, vGroupName) for vGroupName, weight in weightDict.items())[1]
else:
return '(null)'
with ProgressReportSubstep(progress, 2, "OBJ Export path: %r" % filepath, "OBJ Export Finished") as subprogress1:
with open(filepath, "w", encoding="utf8", newline="\n") as f:
fw = f.write
# Write Header
fw('# Blender v%s OBJ File: %r\n' % (bpy.app.version_string, os.path.basename(bpy.data.filepath)))
fw('# www.blender.org\n')
# Tell the obj file what material file to use.
if EXPORT_MTL:
mtlfilepath = os.path.splitext(filepath)[0] + ".mtl"
# filepath can contain non utf8 chars, use repr
fw('mtllib %s\n' % repr(os.path.basename(mtlfilepath))[1:-1])
# Initialize totals, these are updated each object
totverts = totuvco = totno = 1
face_vert_index = 1
# A Dict of Materials
# (material.name, image.name):matname_imagename # matname_imagename has gaps removed.
mtl_dict = {}
# Used to reduce the usage of matname_texname materials, which can become annoying in case of
# repeated exports/imports, yet keeping unique mat names per keys!
# mtl_name: (material.name, image.name)
mtl_rev_dict = {}
copy_set = set()
# Get all meshes
subprogress1.enter_substeps(len(objects))
for i, ob_main in enumerate(objects):
# ignore dupli children
if ob_main.parent and ob_main.parent.instance_type in {'VERTS', 'FACES'}:
subprogress1.step("Ignoring %s, dupli child..." % ob_main.name)
continue
obs = [(ob_main, ob_main.matrix_world)]
if ob_main.is_instancer:
obs += [(dup.instance_object.original, dup.matrix_world.copy())
for dup in depsgraph.object_instances
if dup.parent and dup.parent.original == ob_main]
# ~ print(ob_main.name, 'has', len(obs) - 1, 'dupli children')
subprogress1.enter_substeps(len(obs))
for ob, ob_mat in obs:
with ProgressReportSubstep(subprogress1, 6) as subprogress2:
uv_unique_count = no_unique_count = 0
# Nurbs curve support
if EXPORT_CURVE_AS_NURBS and test_nurbs_compat(ob):
ob_mat = EXPORT_GLOBAL_MATRIX @ ob_mat
totverts += write_nurb(fw, ob, ob_mat)
continue
# END NURBS
ob_for_convert = ob.evaluated_get(depsgraph) if EXPORT_APPLY_MODIFIERS else ob.original
try:
me = ob_for_convert.to_mesh()
except RuntimeError:
me = None
if me is None:
continue
# _must_ do this before applying transformation, else tessellation may differ
if EXPORT_TRI:
# _must_ do this first since it re-allocs arrays
mesh_triangulate(me)
me.transform(EXPORT_GLOBAL_MATRIX @ ob_mat)
# If negative scaling, we have to invert the normals...
if ob_mat.determinant() < 0.0:
me.flip_normals()
if EXPORT_UV:
faceuv = len(me.uv_layers) > 0
if faceuv:
uv_layer = me.uv_layers.active.data[:]
else:
faceuv = False
me_verts = me.vertices[:]
# Make our own list so it can be sorted to reduce context switching
face_index_pairs = [(face, index) for index, face in enumerate(me.polygons)]
if EXPORT_EDGES:
edges = me.edges
else:
edges = []
if not (len(face_index_pairs) + len(edges) + len(me.vertices)): # Make sure there is something to write
# clean up
ob_for_convert.to_mesh_clear()
continue # dont bother with this mesh.
if EXPORT_NORMALS and face_index_pairs:
me.calc_normals_split()
# No need to call me.free_normals_split later, as this mesh is deleted anyway!
loops = me.loops
if (EXPORT_SMOOTH_GROUPS or EXPORT_SMOOTH_GROUPS_BITFLAGS) and face_index_pairs:
smooth_groups, smooth_groups_tot = me.calc_smooth_groups(use_bitflags=EXPORT_SMOOTH_GROUPS_BITFLAGS)
if smooth_groups_tot <= 1:
smooth_groups, smooth_groups_tot = (), 0
else:
smooth_groups, smooth_groups_tot = (), 0
materials = me.materials[:]
material_names = [m.name if m else None for m in materials]
# avoid bad index errors
if not materials:
materials = [None]
material_names = [name_compat(None)]
# Sort by Material, then images
# so we dont over context switch in the obj file.
if EXPORT_KEEP_VERT_ORDER:
pass
else:
if len(materials) > 1:
if smooth_groups:
sort_func = lambda a: (a[0].material_index,
smooth_groups[a[1]] if a[0].use_smooth else False)
else:
sort_func = lambda a: (a[0].material_index,
a[0].use_smooth)
else:
# no materials
if smooth_groups:
sort_func = lambda a: smooth_groups[a[1] if a[0].use_smooth else False]
else:
sort_func = lambda a: a[0].use_smooth
face_index_pairs.sort(key=sort_func)
del sort_func
# Set the default mat to no material and no image.
contextMat = 0, 0 # Can never be this, so we will label a new material the first chance we get.
contextSmooth = None # Will either be true or false, set bad to force initialization switch.
if EXPORT_BLEN_OBS or EXPORT_GROUP_BY_OB:
name1 = ob.name
name2 = ob.data.name
if name1 == name2:
obnamestring = name_compat(name1)
else:
obnamestring = '%s_%s' % (name_compat(name1), name_compat(name2))
if EXPORT_BLEN_OBS:
fw('o %s\n' % obnamestring) # Write Object name
else: # if EXPORT_GROUP_BY_OB:
fw('g %s\n' % obnamestring)
subprogress2.step()
# Vert
for v in me_verts:
fw('v %.6f %.6f %.6f\n' % v.co[:])
subprogress2.step()
# UV
if faceuv:
# in case removing some of these dont get defined.
uv = f_index = uv_index = uv_key = uv_val = uv_ls = None
uv_face_mapping = [None] * len(face_index_pairs)
uv_dict = {}
uv_get = uv_dict.get
for f, f_index in face_index_pairs:
uv_ls = uv_face_mapping[f_index] = []
for uv_index, l_index in enumerate(f.loop_indices):
uv = uv_layer[l_index].uv
# include the vertex index in the key so we don't share UV's between vertices,
# allowed by the OBJ spec but can cause issues for other importers, see: T47010.
# this works too, shared UV's for all verts
#~ uv_key = veckey2d(uv)
uv_key = loops[l_index].vertex_index, veckey2d(uv)
uv_val = uv_get(uv_key)
if uv_val is None:
uv_val = uv_dict[uv_key] = uv_unique_count
fw('vt %.6f %.6f\n' % uv[:])
uv_unique_count += 1
uv_ls.append(uv_val)
del uv_dict, uv, f_index, uv_index, uv_ls, uv_get, uv_key, uv_val
# Only need uv_unique_count and uv_face_mapping
subprogress2.step()
# NORMAL, Smooth/Non smoothed.
if EXPORT_NORMALS:
no_key = no_val = None
normals_to_idx = {}
no_get = normals_to_idx.get
loops_to_normals = [0] * len(loops)
for f, f_index in face_index_pairs:
for l_idx in f.loop_indices:
no_key = veckey3d(loops[l_idx].normal)
no_val = no_get(no_key)
if no_val is None:
no_val = normals_to_idx[no_key] = no_unique_count
fw('vn %.4f %.4f %.4f\n' % no_key)
no_unique_count += 1
loops_to_normals[l_idx] = no_val
del normals_to_idx, no_get, no_key, no_val
else:
loops_to_normals = []
subprogress2.step()
# XXX
if EXPORT_POLYGROUPS:
# Retrieve the list of vertex groups
vertGroupNames = ob.vertex_groups.keys()
if vertGroupNames:
currentVGroup = ''
# Create a dictionary keyed by face id and listing, for each vertex, the vertex groups it belongs to
vgroupsMap = [[] for _i in range(len(me_verts))]
for v_idx, v_ls in enumerate(vgroupsMap):
v_ls[:] = [(vertGroupNames[g.group], g.weight) for g in me_verts[v_idx].groups]
for f, f_index in face_index_pairs:
f_smooth = f.use_smooth
if f_smooth and smooth_groups:
f_smooth = smooth_groups[f_index]
f_mat = min(f.material_index, len(materials) - 1)
# MAKE KEY
key = material_names[f_mat], None # No image, use None instead.
# Write the vertex group
if EXPORT_POLYGROUPS:
if vertGroupNames:
# find what vertext group the face belongs to
vgroup_of_face = findVertexGroupName(f, vgroupsMap)
if vgroup_of_face != currentVGroup:
currentVGroup = vgroup_of_face
fw('g %s\n' % vgroup_of_face)
# CHECK FOR CONTEXT SWITCH
if key == contextMat:
pass # Context already switched, dont do anything
else:
if key[0] is None and key[1] is None:
# Write a null material, since we know the context has changed.
if EXPORT_GROUP_BY_MAT:
# can be mat_image or (null)
fw("g %s_%s\n" % (name_compat(ob.name), name_compat(ob.data.name)))
if EXPORT_MTL:
fw("usemtl (null)\n") # mat, image
else:
mat_data = mtl_dict.get(key)
if not mat_data:
# First add to global dict so we can export to mtl
# Then write mtl
# Make a new names from the mat and image name,
# converting any spaces to underscores with name_compat.
# If none image dont bother adding it to the name
# Try to avoid as much as possible adding texname (or other things)
# to the mtl name (see [#32102])...
mtl_name = "%s" % name_compat(key[0])
if mtl_rev_dict.get(mtl_name, None) not in {key, None}:
if key[1] is None:
tmp_ext = "_NONE"
else:
tmp_ext = "_%s" % name_compat(key[1])
i = 0
while mtl_rev_dict.get(mtl_name + tmp_ext, None) not in {key, None}:
i += 1
tmp_ext = "_%3d" % i
mtl_name += tmp_ext
mat_data = mtl_dict[key] = mtl_name, materials[f_mat]
mtl_rev_dict[mtl_name] = key
if EXPORT_GROUP_BY_MAT:
# can be mat_image or (null)
fw("g %s_%s_%s\n" % (name_compat(ob.name), name_compat(ob.data.name), mat_data[0]))
if EXPORT_MTL:
fw("usemtl %s\n" % mat_data[0]) # can be mat_image or (null)
contextMat = key
if f_smooth != contextSmooth:
if f_smooth: # on now off
if smooth_groups:
f_smooth = smooth_groups[f_index]
fw('s %d\n' % f_smooth)
else:
fw('s 1\n')
else: # was off now on
fw('s off\n')
contextSmooth = f_smooth
f_v = [(vi, me_verts[v_idx], l_idx)
for vi, (v_idx, l_idx) in enumerate(zip(f.vertices, f.loop_indices))]
fw('f')
if faceuv:
if EXPORT_NORMALS:
for vi, v, li in f_v:
fw(" %d/%d/%d" % (totverts + v.index,
totuvco + uv_face_mapping[f_index][vi],
totno + loops_to_normals[li],
)) # vert, uv, normal
else: # No Normals
for vi, v, li in f_v:
fw(" %d/%d" % (totverts + v.index,
totuvco + uv_face_mapping[f_index][vi],
)) # vert, uv
face_vert_index += len(f_v)
else: # No UV's
if EXPORT_NORMALS:
for vi, v, li in f_v:
fw(" %d//%d" % (totverts + v.index, totno + loops_to_normals[li]))
else: # No Normals
for vi, v, li in f_v:
fw(" %d" % (totverts + v.index))
fw('\n')
subprogress2.step()
# Write edges.
if EXPORT_EDGES:
for ed in edges:
if ed.is_loose:
fw('l %d %d\n' % (totverts + ed.vertices[0], totverts + ed.vertices[1]))
# Make the indices global rather then per mesh
totverts += len(me_verts)
totuvco += uv_unique_count
totno += no_unique_count
# clean up
ob_for_convert.to_mesh_clear()
subprogress1.leave_substeps("Finished writing geometry of '%s'." % ob_main.name)
subprogress1.leave_substeps()
subprogress1.step("Finished exporting geometry, now exporting materials")
# Now we have all our materials, save them
if EXPORT_MTL:
write_mtl(scene, mtlfilepath, EXPORT_PATH_MODE, copy_set, mtl_dict)
# copy all collected files.
io_utils.path_reference_copy(copy_set)
def _write(context, filepath,
EXPORT_TRI, # ok
EXPORT_EDGES,
EXPORT_SMOOTH_GROUPS,
EXPORT_SMOOTH_GROUPS_BITFLAGS,
EXPORT_NORMALS, # ok
EXPORT_UV, # ok
EXPORT_MTL,
EXPORT_APPLY_MODIFIERS, # ok
EXPORT_APPLY_MODIFIERS_RENDER, # ok
EXPORT_BLEN_OBS,
EXPORT_GROUP_BY_OB,
EXPORT_GROUP_BY_MAT,
EXPORT_KEEP_VERT_ORDER,
EXPORT_POLYGROUPS,
EXPORT_CURVE_AS_NURBS,
EXPORT_SEL_ONLY, # ok
EXPORT_ANIMATION,
EXPORT_GLOBAL_MATRIX,
EXPORT_PATH_MODE, # Not used
):
with ProgressReport(context.window_manager) as progress:
base_name, ext = os.path.splitext(filepath)
context_name = [base_name, '', '', ext] # Base name, scene name, frame number, extension
depsgraph = context.evaluated_depsgraph_get()
scene = context.scene
# Exit edit mode before exporting, so current object states are exported properly.
if bpy.ops.object.mode_set.poll():
bpy.ops.object.mode_set(mode='OBJECT')
orig_frame = scene.frame_current
# Export an animation?
if EXPORT_ANIMATION:
scene_frames = range(scene.frame_start, scene.frame_end + 1) # Up to and including the end frame.
else:
scene_frames = [orig_frame] # Dont export an animation.
# Loop through all frames in the scene and export.
progress.enter_substeps(len(scene_frames))
for frame in scene_frames:
if EXPORT_ANIMATION: # Add frame to the filepath.
context_name[2] = '_%.6d' % frame
scene.frame_set(frame, subframe=0.0)
if EXPORT_SEL_ONLY:
objects = context.selected_objects
else:
objects = scene.objects
full_path = ''.join(context_name)
# erm... bit of a problem here, this can overwrite files when exporting frames. not too bad.
# EXPORT THE FILE.
progress.enter_substeps(1)
write_file(full_path, objects, depsgraph, scene,
EXPORT_TRI,
EXPORT_EDGES,
EXPORT_SMOOTH_GROUPS,
EXPORT_SMOOTH_GROUPS_BITFLAGS,
EXPORT_NORMALS,
EXPORT_UV,
EXPORT_MTL,
EXPORT_APPLY_MODIFIERS,
EXPORT_APPLY_MODIFIERS_RENDER,
EXPORT_BLEN_OBS,
EXPORT_GROUP_BY_OB,
EXPORT_GROUP_BY_MAT,
EXPORT_KEEP_VERT_ORDER,
EXPORT_POLYGROUPS,
EXPORT_CURVE_AS_NURBS,
EXPORT_GLOBAL_MATRIX,
EXPORT_PATH_MODE,
progress,
)
progress.leave_substeps()
scene.frame_set(orig_frame, subframe=0.0)
progress.leave_substeps()
"""
Currently the exporter lacks these features:
* multiple scene export (only active scene is written)
* particles
"""
def save(context,
filepath,
*,
use_triangles=False,
use_edges=True,
use_normals=False,
use_smooth_groups=False,
use_smooth_groups_bitflags=False,
use_uvs=True,
use_materials=True,
use_mesh_modifiers=True,
use_mesh_modifiers_render=False,
use_blen_objects=True,
group_by_object=False,
group_by_material=False,
keep_vertex_order=False,
use_vertex_groups=False,
use_nurbs=True,
use_selection=True,
use_animation=False,
global_matrix=None,
path_mode='AUTO'
):
_write(context, filepath,
EXPORT_TRI=use_triangles,
EXPORT_EDGES=use_edges,
EXPORT_SMOOTH_GROUPS=use_smooth_groups,
EXPORT_SMOOTH_GROUPS_BITFLAGS=use_smooth_groups_bitflags,
EXPORT_NORMALS=use_normals,
EXPORT_UV=use_uvs,
EXPORT_MTL=use_materials,
EXPORT_APPLY_MODIFIERS=use_mesh_modifiers,
EXPORT_APPLY_MODIFIERS_RENDER=use_mesh_modifiers_render,
EXPORT_BLEN_OBS=use_blen_objects,
EXPORT_GROUP_BY_OB=group_by_object,
EXPORT_GROUP_BY_MAT=group_by_material,
EXPORT_KEEP_VERT_ORDER=keep_vertex_order,
EXPORT_POLYGROUPS=use_vertex_groups,
EXPORT_CURVE_AS_NURBS=use_nurbs,
EXPORT_SEL_ONLY=use_selection,
EXPORT_ANIMATION=use_animation,
EXPORT_GLOBAL_MATRIX=global_matrix,
EXPORT_PATH_MODE=path_mode,
)
return {'FINISHED'}