-
Notifications
You must be signed in to change notification settings - Fork 0
/
OBJLoader.js
798 lines (489 loc) · 25.4 KB
/
OBJLoader.js
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
/**
* @author mrdoob / http://mrdoob.com/
*/
THREE.OBJLoader = ( function () {
// o object_name | g group_name
var object_pattern = /^[og]\s*(.+)?/;
// mtllib file_reference
var material_library_pattern = /^mtllib /;
// usemtl material_name
var material_use_pattern = /^usemtl /;
function ParserState() {
var state = {
objects: [],
object: {},
vertices: [],
normals: [],
colors: [],
uvs: [],
materialLibraries: [],
startObject: function ( name, fromDeclaration ) {
// If the current object (initial from reset) is not from a g/o declaration in the parsed
// file. We need to use it for the first parsed g/o to keep things in sync.
if ( this.object && this.object.fromDeclaration === false ) {
this.object.name = name;
this.object.fromDeclaration = ( fromDeclaration !== false );
return;
}
var previousMaterial = ( this.object && typeof this.object.currentMaterial === 'function' ? this.object.currentMaterial() : undefined );
if ( this.object && typeof this.object._finalize === 'function' ) {
this.object._finalize( true );
}
this.object = {
name: name || '',
fromDeclaration: ( fromDeclaration !== false ),
geometry: {
vertices: [],
normals: [],
colors: [],
uvs: []
},
materials: [],
smooth: true,
startMaterial: function ( name, libraries ) {
var previous = this._finalize( false );
// New usemtl declaration overwrites an inherited material, except if faces were declared
// after the material, then it must be preserved for proper MultiMaterial continuation.
if ( previous && ( previous.inherited || previous.groupCount <= 0 ) ) {
this.materials.splice( previous.index, 1 );
}
var material = {
index: this.materials.length,
name: name || '',
mtllib: ( Array.isArray( libraries ) && libraries.length > 0 ? libraries[ libraries.length - 1 ] : '' ),
smooth: ( previous !== undefined ? previous.smooth : this.smooth ),
groupStart: ( previous !== undefined ? previous.groupEnd : 0 ),
groupEnd: - 1,
groupCount: - 1,
inherited: false,
clone: function ( index ) {
var cloned = {
index: ( typeof index === 'number' ? index : this.index ),
name: this.name,
mtllib: this.mtllib,
smooth: this.smooth,
groupStart: 0,
groupEnd: - 1,
groupCount: - 1,
inherited: false
};
cloned.clone = this.clone.bind( cloned );
return cloned;
}
};
this.materials.push( material );
return material;
},
currentMaterial: function () {
if ( this.materials.length > 0 ) {
return this.materials[ this.materials.length - 1 ];
}
return undefined;
},
_finalize: function ( end ) {
var lastMultiMaterial = this.currentMaterial();
if ( lastMultiMaterial && lastMultiMaterial.groupEnd === - 1 ) {
lastMultiMaterial.groupEnd = this.geometry.vertices.length / 3;
lastMultiMaterial.groupCount = lastMultiMaterial.groupEnd - lastMultiMaterial.groupStart;
lastMultiMaterial.inherited = false;
}
// Ignore objects tail materials if no face declarations followed them before a new o/g started.
if ( end && this.materials.length > 1 ) {
for ( var mi = this.materials.length - 1; mi >= 0; mi -- ) {
if ( this.materials[ mi ].groupCount <= 0 ) {
this.materials.splice( mi, 1 );
}
}
}
// Guarantee at least one empty material, this makes the creation later more straight forward.
if ( end && this.materials.length === 0 ) {
this.materials.push( {
name: '',
smooth: this.smooth
} );
}
return lastMultiMaterial;
}
};
// Inherit previous objects material.
// Spec tells us that a declared material must be set to all objects until a new material is declared.
// If a usemtl declaration is encountered while this new object is being parsed, it will
// overwrite the inherited material. Exception being that there was already face declarations
// to the inherited material, then it will be preserved for proper MultiMaterial continuation.
if ( previousMaterial && previousMaterial.name && typeof previousMaterial.clone === 'function' ) {
var declared = previousMaterial.clone( 0 );
declared.inherited = true;
this.object.materials.push( declared );
}
this.objects.push( this.object );
},
finalize: function () {
if ( this.object && typeof this.object._finalize === 'function' ) {
this.object._finalize( true );
}
},
parseVertexIndex: function ( value, len ) {
var index = parseInt( value, 10 );
return ( index >= 0 ? index - 1 : index + len / 3 ) * 3;
},
parseNormalIndex: function ( value, len ) {
var index = parseInt( value, 10 );
return ( index >= 0 ? index - 1 : index + len / 3 ) * 3;
},
parseUVIndex: function ( value, len ) {
var index = parseInt( value, 10 );
return ( index >= 0 ? index - 1 : index + len / 2 ) * 2;
},
addVertex: function ( a, b, c ) {
var src = this.vertices;
var dst = this.object.geometry.vertices;
dst.push( src[ a + 0 ], src[ a + 1 ], src[ a + 2 ] );
dst.push( src[ b + 0 ], src[ b + 1 ], src[ b + 2 ] );
dst.push( src[ c + 0 ], src[ c + 1 ], src[ c + 2 ] );
},
addVertexPoint: function ( a ) {
var src = this.vertices;
var dst = this.object.geometry.vertices;
dst.push( src[ a + 0 ], src[ a + 1 ], src[ a + 2 ] );
},
addVertexLine: function ( a ) {
var src = this.vertices;
var dst = this.object.geometry.vertices;
dst.push( src[ a + 0 ], src[ a + 1 ], src[ a + 2 ] );
},
addNormal: function ( a, b, c ) {
var src = this.normals;
var dst = this.object.geometry.normals;
dst.push( src[ a + 0 ], src[ a + 1 ], src[ a + 2 ] );
dst.push( src[ b + 0 ], src[ b + 1 ], src[ b + 2 ] );
dst.push( src[ c + 0 ], src[ c + 1 ], src[ c + 2 ] );
},
addColor: function ( a, b, c ) {
var src = this.colors;
var dst = this.object.geometry.colors;
dst.push( src[ a + 0 ], src[ a + 1 ], src[ a + 2 ] );
dst.push( src[ b + 0 ], src[ b + 1 ], src[ b + 2 ] );
dst.push( src[ c + 0 ], src[ c + 1 ], src[ c + 2 ] );
},
addUV: function ( a, b, c ) {
var src = this.uvs;
var dst = this.object.geometry.uvs;
dst.push( src[ a + 0 ], src[ a + 1 ] );
dst.push( src[ b + 0 ], src[ b + 1 ] );
dst.push( src[ c + 0 ], src[ c + 1 ] );
},
addUVLine: function ( a ) {
var src = this.uvs;
var dst = this.object.geometry.uvs;
dst.push( src[ a + 0 ], src[ a + 1 ] );
},
addFace: function ( a, b, c, ua, ub, uc, na, nb, nc ) {
var vLen = this.vertices.length;
var ia = this.parseVertexIndex( a, vLen );
var ib = this.parseVertexIndex( b, vLen );
var ic = this.parseVertexIndex( c, vLen );
this.addVertex( ia, ib, ic );
if ( ua !== undefined && ua !== '' ) {
var uvLen = this.uvs.length;
ia = this.parseUVIndex( ua, uvLen );
ib = this.parseUVIndex( ub, uvLen );
ic = this.parseUVIndex( uc, uvLen );
this.addUV( ia, ib, ic );
}
if ( na !== undefined && na !== '' ) {
// Normals are many times the same. If so, skip function call and parseInt.
var nLen = this.normals.length;
ia = this.parseNormalIndex( na, nLen );
ib = na === nb ? ia : this.parseNormalIndex( nb, nLen );
ic = na === nc ? ia : this.parseNormalIndex( nc, nLen );
this.addNormal( ia, ib, ic );
}
if ( this.colors.length > 0 ) {
this.addColor( ia, ib, ic );
}
},
addPointGeometry: function ( vertices ) {
this.object.geometry.type = 'Points';
var vLen = this.vertices.length;
for ( var vi = 0, l = vertices.length; vi < l; vi ++ ) {
this.addVertexPoint( this.parseVertexIndex( vertices[ vi ], vLen ) );
}
},
addLineGeometry: function ( vertices, uvs ) {
this.object.geometry.type = 'Line';
var vLen = this.vertices.length;
var uvLen = this.uvs.length;
for ( var vi = 0, l = vertices.length; vi < l; vi ++ ) {
this.addVertexLine( this.parseVertexIndex( vertices[ vi ], vLen ) );
}
for ( var uvi = 0, l = uvs.length; uvi < l; uvi ++ ) {
this.addUVLine( this.parseUVIndex( uvs[ uvi ], uvLen ) );
}
}
};
state.startObject( '', false );
return state;
}
//
function OBJLoader( manager ) {
this.manager = ( manager !== undefined ) ? manager : THREE.DefaultLoadingManager;
this.materials = null;
}
OBJLoader.prototype = {
constructor: OBJLoader,
load: function ( url, onLoad, onProgress, onError ) {
var scope = this;
var loader = new THREE.FileLoader( scope.manager );
loader.setPath( this.path );
loader.load( url, function ( text ) {
onLoad( scope.parse( text ) );
}, onProgress, onError );
},
setPath: function ( value ) {
this.path = value;
return this;
},
setMaterials: function ( materials ) {
this.materials = materials;
return this;
},
parse: function ( text ) {
console.time( 'OBJLoader' );
var state = new ParserState();
if ( text.indexOf( '\r\n' ) !== - 1 ) {
// This is faster than String.split with regex that splits on both
text = text.replace( /\r\n/g, '\n' );
}
if ( text.indexOf( '\\\n' ) !== - 1 ) {
// join lines separated by a line continuation character (\)
text = text.replace( /\\\n/g, '' );
}
var lines = text.split( '\n' );
var line = '', lineFirstChar = '';
var lineLength = 0;
var result = [];
// Faster to just trim left side of the line. Use if available.
var trimLeft = ( typeof ''.trimLeft === 'function' );
for ( var i = 0, l = lines.length; i < l; i ++ ) {
line = lines[ i ];
line = trimLeft ? line.trimLeft() : line.trim();
lineLength = line.length;
if ( lineLength === 0 ) continue;
lineFirstChar = line.charAt( 0 );
// @todo invoke passed in handler if any
if ( lineFirstChar === '#' ) continue;
if ( lineFirstChar === 'v' ) {
var data = line.split( /\s+/ );
switch ( data[ 0 ] ) {
case 'v':
state.vertices.push(
parseFloat( data[ 1 ] ),
parseFloat( data[ 2 ] ),
parseFloat( data[ 3 ] )
);
if ( data.length >= 7 ) {
state.colors.push(
parseFloat( data[ 4 ] ),
parseFloat( data[ 5 ] ),
parseFloat( data[ 6 ] )
);
}
break;
case 'vn':
state.normals.push(
parseFloat( data[ 1 ] ),
parseFloat( data[ 2 ] ),
parseFloat( data[ 3 ] )
);
break;
case 'vt':
state.uvs.push(
parseFloat( data[ 1 ] ),
parseFloat( data[ 2 ] )
);
break;
}
} else if ( lineFirstChar === 'f' ) {
var lineData = line.substr( 1 ).trim();
var vertexData = lineData.split( /\s+/ );
var faceVertices = [];
// Parse the face vertex data into an easy to work with format
for ( var j = 0, jl = vertexData.length; j < jl; j ++ ) {
var vertex = vertexData[ j ];
if ( vertex.length > 0 ) {
var vertexParts = vertex.split( '/' );
faceVertices.push( vertexParts );
}
}
// Draw an edge between the first vertex and all subsequent vertices to form an n-gon
var v1 = faceVertices[ 0 ];
for ( var j = 1, jl = faceVertices.length - 1; j < jl; j ++ ) {
var v2 = faceVertices[ j ];
var v3 = faceVertices[ j + 1 ];
state.addFace(
v1[ 0 ], v2[ 0 ], v3[ 0 ],
v1[ 1 ], v2[ 1 ], v3[ 1 ],
v1[ 2 ], v2[ 2 ], v3[ 2 ]
);
}
} else if ( lineFirstChar === 'l' ) {
var lineParts = line.substring( 1 ).trim().split( " " );
var lineVertices = [], lineUVs = [];
if ( line.indexOf( "/" ) === - 1 ) {
lineVertices = lineParts;
} else {
for ( var li = 0, llen = lineParts.length; li < llen; li ++ ) {
var parts = lineParts[ li ].split( "/" );
if ( parts[ 0 ] !== "" ) lineVertices.push( parts[ 0 ] );
if ( parts[ 1 ] !== "" ) lineUVs.push( parts[ 1 ] );
}
}
state.addLineGeometry( lineVertices, lineUVs );
} else if ( lineFirstChar === 'p' ) {
var lineData = line.substr( 1 ).trim();
var pointData = lineData.split( " " );
state.addPointGeometry( pointData );
} else if ( ( result = object_pattern.exec( line ) ) !== null ) {
// o object_name
// or
// g group_name
// WORKAROUND: https://bugs.chromium.org/p/v8/issues/detail?id=2869
// var name = result[ 0 ].substr( 1 ).trim();
var name = ( " " + result[ 0 ].substr( 1 ).trim() ).substr( 1 );
state.startObject( name );
} else if ( material_use_pattern.test( line ) ) {
// material
state.object.startMaterial( line.substring( 7 ).trim(), state.materialLibraries );
} else if ( material_library_pattern.test( line ) ) {
// mtl file
state.materialLibraries.push( line.substring( 7 ).trim() );
} else if ( lineFirstChar === 's' ) {
result = line.split( ' ' );
// smooth shading
// @todo Handle files that have varying smooth values for a set of faces inside one geometry,
// but does not define a usemtl for each face set.
// This should be detected and a dummy material created (later MultiMaterial and geometry groups).
// This requires some care to not create extra material on each smooth value for "normal" obj files.
// where explicit usemtl defines geometry groups.
// Example asset: examples/models/obj/cerberus/Cerberus.obj
/*
* http://paulbourke.net/dataformats/obj/
* or
* http://www.cs.utah.edu/~boulos/cs3505/obj_spec.pdf
*
* From chapter "Grouping" Syntax explanation "s group_number":
* "group_number is the smoothing group number. To turn off smoothing groups, use a value of 0 or off.
* Polygonal elements use group numbers to put elements in different smoothing groups. For free-form
* surfaces, smoothing groups are either turned on or off; there is no difference between values greater
* than 0."
*/
if ( result.length > 1 ) {
var value = result[ 1 ].trim().toLowerCase();
state.object.smooth = ( value !== '0' && value !== 'off' );
} else {
// ZBrush can produce "s" lines #11707
state.object.smooth = true;
}
var material = state.object.currentMaterial();
if ( material ) material.smooth = state.object.smooth;
} else {
// Handle null terminated files without exception
if ( line === '\0' ) continue;
throw new Error( 'THREE.OBJLoader: Unexpected line: "' + line + '"' );
}
}
state.finalize();
var container = new THREE.Group();
container.materialLibraries = [].concat( state.materialLibraries );
for ( var i = 0, l = state.objects.length; i < l; i ++ ) {
var object = state.objects[ i ];
var geometry = object.geometry;
var materials = object.materials;
var isLine = ( geometry.type === 'Line' );
var isPoints = ( geometry.type === 'Points' );
var hasVertexColors = false;
// Skip o/g line declarations that did not follow with any faces
if ( geometry.vertices.length === 0 ) continue;
var buffergeometry = new THREE.BufferGeometry();
buffergeometry.addAttribute( 'position', new THREE.Float32BufferAttribute( geometry.vertices, 3 ) );
if ( geometry.normals.length > 0 ) {
buffergeometry.addAttribute( 'normal', new THREE.Float32BufferAttribute( geometry.normals, 3 ) );
} else {
buffergeometry.computeVertexNormals();
}
if ( geometry.colors.length > 0 ) {
hasVertexColors = true;
buffergeometry.addAttribute( 'color', new THREE.Float32BufferAttribute( geometry.colors, 3 ) );
}
if ( geometry.uvs.length > 0 ) {
buffergeometry.addAttribute( 'uv', new THREE.Float32BufferAttribute( geometry.uvs, 2 ) );
}
// Create materials
var createdMaterials = [];
for ( var mi = 0, miLen = materials.length; mi < miLen; mi ++ ) {
var sourceMaterial = materials[ mi ];
var material = undefined;
if ( this.materials !== null ) {
material = this.materials.create( sourceMaterial.name );
// mtl etc. loaders probably can't create line materials correctly, copy properties to a line material.
if ( isLine && material && ! ( material instanceof THREE.LineBasicMaterial ) ) {
var materialLine = new THREE.LineBasicMaterial();
THREE.Material.prototype.copy.call( materialLine, material );
materialLine.color.copy( material.color );
materialLine.lights = false;
material = materialLine;
} else if ( isPoints && material && ! ( material instanceof THREE.PointsMaterial ) ) {
var materialPoints = new THREE.PointsMaterial( { size: 10, sizeAttenuation: false } );
THREE.Material.prototype.copy.call( materialPoints, material );
materialPoints.color.copy( material.color );
materialPoints.map = material.map;
materialPoints.lights = false;
material = materialPoints;
}
}
if ( ! material ) {
if ( isLine ) {
material = new THREE.LineBasicMaterial();
} else if ( isPoints ) {
material = new THREE.PointsMaterial( { size: 1, sizeAttenuation: false } );
} else {
material = new THREE.MeshPhongMaterial();
}
material.name = sourceMaterial.name;
}
material.flatShading = sourceMaterial.smooth ? false : true;
material.vertexColors = hasVertexColors ? THREE.VertexColors : THREE.NoColors;
createdMaterials.push( material );
}
// Create mesh
var mesh;
if ( createdMaterials.length > 1 ) {
for ( var mi = 0, miLen = materials.length; mi < miLen; mi ++ ) {
var sourceMaterial = materials[ mi ];
buffergeometry.addGroup( sourceMaterial.groupStart, sourceMaterial.groupCount, mi );
}
if ( isLine ) {
mesh = new THREE.LineSegments( buffergeometry, createdMaterials );
} else if ( isPoints ) {
mesh = new THREE.Points( buffergeometry, createdMaterials );
} else {
mesh = new THREE.Mesh( buffergeometry, createdMaterials );
}
} else {
if ( isLine ) {
mesh = new THREE.LineSegments( buffergeometry, createdMaterials[ 0 ] );
} else if ( isPoints ) {
mesh = new THREE.Points( buffergeometry, createdMaterials[ 0 ] );
} else {
mesh = new THREE.Mesh( buffergeometry, createdMaterials[ 0 ] );
}
}
mesh.name = object.name;
container.add( mesh );
}
console.timeEnd( 'OBJLoader' );
return container;
}
};
return OBJLoader;
} )();