summaryrefslogtreecommitdiff
path: root/graphics/asymptote/drawsurface.h
blob: 3b0ba2de83aa308140e902b8af6c930914c64a9c (plain)
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
/*****
 * drawsurface.h
 *
 * Stores a surface that has been added to a picture.
 *****/

#ifndef DRAWSURFACE_H
#define DRAWSURFACE_H

#include "drawelement.h"
#include "arrayop.h"
#include "path3.h"
#include "beziercurve.h"
#include "bezierpatch.h"

namespace run {
void inverse(double *a, size_t n);
}

const string need3pens="array of 3 pens required";

namespace camp {

#ifdef HAVE_LIBGLM
void storecolor(GLfloat *colors, int i, const vm::array &pens, int j);
#endif  

class drawSurface : public drawElement {
protected:
  triple *controls;
  size_t ncontrols;
  triple center;
  bool straight; // True iff Bezier patch is planar and has straight edges.
  prc::RGBAColour diffuse;
  prc::RGBAColour emissive;
  prc::RGBAColour specular;
  prc::RGBAColour *colors;
  double opacity;
  double shininess;
  double metallic;
  double fresnel0;
  bool invisible;
  Interaction interaction;
  bool billboard;
  size_t centerIndex;  
  
  triple Min,Max;
  int digits;
  bool primitive;
  
public:
#ifdef HAVE_GL
  BezierCurve C;
  bool transparent;
#endif  
  
  string wrongsize() {
    return (ncontrols == 16 ? "4x4" : "triangular")+
      string(" array of triples and array of 4 pens required");
  }
  
  void init() {
#ifdef HAVE_LIBOSMESA
    billboard=false;
#else
    billboard=interaction == BILLBOARD;
#endif
    centerIndex=0;
  }
  
  drawSurface(const vm::array& g, size_t ncontrols, triple center,
              bool straight, const vm::array&p, double opacity,
              double shininess, double metallic, double fresnel0,
              const vm::array &pens, Interaction interaction, int digits,
              bool primitive=true, const string& key="") :
    drawElement(key), ncontrols(ncontrols), center(center), straight(straight),
    opacity(opacity), shininess(shininess), metallic(metallic),
    fresnel0(fresnel0), interaction(interaction), digits(digits),
    primitive(primitive) {
    init();
    if(checkArray(&g) != 4 || checkArray(&p) != 3)
      reportError(wrongsize());
    
    size_t k=0;
    controls=new(UseGC) triple[ncontrols];
    for(unsigned int i=0; i < 4; ++i) {
      vm::array *gi=vm::read<vm::array*>(g,i);
      size_t n=(ncontrols == 16 ? 4 : i+1);
      if(checkArray(gi) != n)
        reportError(wrongsize());
      for(unsigned int j=0; j < n; ++j)
        controls[k++]=vm::read<triple>(gi,j);
    }
    
    pen surfacepen=vm::read<camp::pen>(p,0);
    invisible=surfacepen.invisible();
    
    diffuse=rgba(surfacepen);
    emissive=rgba(vm::read<camp::pen>(p,1));
    specular=rgba(vm::read<camp::pen>(p,2));
    
    size_t nodes=(ncontrols == 16 ? 4 : 3);
    size_t size=checkArray(&pens);
    if(size > 0) {
      if(size != nodes) reportError("one vertex pen required per node");
      colors=new(UseGC) prc::RGBAColour[nodes];
      for(size_t i=0; i < nodes; ++i)
      colors[i]=rgba(vm::read<camp::pen>(pens,i));
    } else colors=NULL;
  }
  
  drawSurface(const double* t, const drawSurface *s) :
    drawElement(s->KEY), ncontrols(s->ncontrols), straight(s->straight),
    diffuse(s->diffuse), emissive(s->emissive), specular(s->specular),
    colors(s->colors), opacity(s->opacity), shininess(s->shininess),
    metallic(s->metallic), fresnel0(s->fresnel0), invisible(s->invisible),
    interaction(s->interaction), digits(s->digits), primitive(s->primitive) {
    init();
    if(s->controls) {
      controls=new(UseGC) triple[ncontrols];
      for(unsigned int i=0; i < ncontrols; ++i)
        controls[i]=t*s->controls[i];
    } else controls=NULL;
  
    center=t*s->center;
  }
  
  virtual ~drawSurface() {}

  bool is3D() {return true;}
};
  
class drawBezierPatch : public drawSurface {
public:  
#ifdef HAVE_GL
  BezierPatch S;
#endif  
  
  drawBezierPatch(const vm::array& g, triple center, bool straight,
              const vm::array&p, double opacity, double shininess,
              double metallic, double fresnel0, const vm::array &pens,
                  Interaction interaction, int digits, bool primitive) :
    drawSurface(g,16,center,straight,p,opacity,shininess,metallic,fresnel0,
                pens,interaction,digits,primitive) {}

  drawBezierPatch(const double* t, const drawBezierPatch *s) :
    drawSurface(t,s) {}
  
  void bounds(const double* t, bbox3& b);
  
  void ratio(const double* t, pair &b, double (*m)(double, double),
             double fuzz, bool &first);
  
  void meshinit() {
    if(billboard)
      centerIndex=centerindex(center);
  }
  
  bool write(prcfile *out, unsigned int *, double, groupsmap&);
  bool write(jsfile *out);
  
  void render(double, const triple& b, const triple& B,
              double perspective, bool remesh);
  drawElement *transformed(const double* t);
};
  
class drawBezierTriangle : public drawSurface {
public:
#ifdef HAVE_GL
  BezierTriangle S;
#endif  
  
  drawBezierTriangle(const vm::array& g, triple center, bool straight,
                     const vm::array&p, double opacity, double shininess,
                     double metallic, double fresnel0, const vm::array &pens,
                     Interaction interaction, int digits, bool primitive) :
    drawSurface(g,10,center,straight,p,opacity,shininess,metallic,fresnel0,
                pens,interaction,digits,primitive) {}
  
  drawBezierTriangle(const double* t, const drawBezierTriangle *s) :
    drawSurface(t,s) {}
  
  void bounds(const double* t, bbox3& b);
  
  void ratio(const double* t, pair &b, double (*m)(double, double),
             double fuzz, bool &first);
  
  void meshinit() {
    if(billboard)
      centerIndex=centerindex(center);
  }
  
  bool write(prcfile *out, unsigned int *, double, groupsmap&);
  bool write(jsfile *out);
  
  void render(double, const triple& b, const triple& B,
              double perspective, bool remesh);
  drawElement *transformed(const double* t);
};
  
class drawNurbs : public drawElement {
protected:
  size_t udegree,vdegree;
  size_t nu,nv;
  triple *controls;
  double *weights;
  double *uknots, *vknots;
  prc::RGBAColour diffuse;
  prc::RGBAColour emissive;
  prc::RGBAColour specular;
  double opacity;
  double shininess;
  double metallic;
  double fresnel0;
  triple normal;
  bool invisible;
  
  triple Min,Max;
  
#ifdef HAVE_LIBGLM
  GLfloat *colors;
  GLfloat *Controls;
  GLfloat *uKnots;
  GLfloat *vKnots;
#endif  
  
public:
  drawNurbs(const vm::array& g, const vm::array* uknot, const vm::array* vknot,
            const vm::array* weight, const vm::array&p, double opacity,
            double shininess, double metallic, double fresnel0,
            const vm::array &pens, const string& key="")
    : drawElement(key), opacity(opacity), shininess(shininess),
      metallic(metallic), fresnel0(fresnel0) {
    size_t weightsize=checkArray(weight);
    
    const string wrongsize="Inconsistent NURBS data";
    nu=checkArray(&g);
    
    if(nu == 0 || (weightsize != 0 && weightsize != nu) || checkArray(&p) != 3)
      reportError(wrongsize);
    
    vm::array *g0=vm::read<vm::array*>(g,0);
    nv=checkArray(g0);
    
    size_t n=nu*nv;
    controls=new(UseGC) triple[n];
    
    size_t k=0;
    for(size_t i=0; i < nu; ++i) {
      vm::array *gi=vm::read<vm::array*>(g,i);
      if(checkArray(gi) != nv)  
        reportError(wrongsize);
      for(size_t j=0; j < nv; ++j)
        controls[k++]=vm::read<triple>(gi,j);
    }
      
    if(weightsize > 0) {
      size_t k=0;
      weights=new(UseGC) double[n];
      for(size_t i=0; i < nu; ++i) {
        vm::array *weighti=vm::read<vm::array*>(weight,i);
        if(checkArray(weighti) != nv)  
          reportError(wrongsize);
        for(size_t j=0; j < nv; ++j)
          weights[k++]=vm::read<double>(weighti,j);
      }
    } else weights=NULL;
      
    size_t nuknots=checkArray(uknot);
    size_t nvknots=checkArray(vknot);
    
    if(nuknots <= nu+1 || nuknots > 2*nu || nvknots <= nv+1 || nvknots > 2*nv)
      reportError(wrongsize);

    udegree=nuknots-nu-1;
    vdegree=nvknots-nv-1;
    
    run::copyArrayC(uknots,uknot,0,UseGC);
    run::copyArrayC(vknots,vknot,0,UseGC);
    
    pen surfacepen=vm::read<camp::pen>(p,0);
    invisible=surfacepen.invisible();
    
    diffuse=rgba(surfacepen);
    emissive=rgba(vm::read<camp::pen>(p,1));
    specular=rgba(vm::read<camp::pen>(p,2));
    
#ifdef HAVE_LIBGLM
    Controls=NULL;
    int size=checkArray(&pens);
    if(size > 0) {
      colors=new(UseGC) GLfloat[16];
      if(size != 4) reportError(wrongsize);
      storecolor(colors,0,pens,0);
      storecolor(colors,8,pens,1);
      storecolor(colors,12,pens,2);
      storecolor(colors,4,pens,3);
    } else colors=NULL;
#endif  
  }
  
  drawNurbs(const double* t, const drawNurbs *s) :
    drawElement(s->KEY), udegree(s->udegree), vdegree(s->vdegree), nu(s->nu),
    nv(s->nv), weights(s->weights), uknots(s->uknots), vknots(s->vknots),
    diffuse(s->diffuse),
    emissive(s->emissive), specular(s->specular), opacity(s->opacity),
    shininess(s->shininess), invisible(s->invisible) {
    
    const size_t n=nu*nv;
    controls=new(UseGC) triple[n];
    for(unsigned int i=0; i < n; ++i)
      controls[i]=t*s->controls[i];
    
#ifdef HAVE_LIBGLM
    Controls=NULL;
    colors=s->colors;
#endif    
  }
  
  bool is3D() {return true;}
  
  void bounds(const double* t, bbox3& b);
  
  virtual ~drawNurbs() {}

  bool write(prcfile *out, unsigned int *, double, groupsmap&);
  
  void displacement();
  void ratio(const double* t, pair &b, double (*m)(double, double), double,
             bool &first);

  void render(double size2, const triple& b, const triple& B,
              double perspective, bool remesh);
    
  drawElement *transformed(const double* t);
};
  
// Draw a transformed PRC object.
class drawPRC : public drawElementLC {
protected:
  prc::RGBAColour diffuse;
  prc::RGBAColour emissive;
  prc::RGBAColour specular;
  double opacity;
  double shininess;
  double metallic;
  double fresnel0;
  bool invisible;
public:
  void init(const vm::array&p) {
    if(checkArray(&p) != 3)
      reportError(need3pens);
    
    pen surfacepen=vm::read<camp::pen>(p,0);
    invisible=surfacepen.invisible();
    
    diffuse=rgba(surfacepen);
    emissive=rgba(vm::read<camp::pen>(p,1));
    specular=rgba(vm::read<camp::pen>(p,2));
  }
  
  drawPRC(const vm::array& t, const vm::array&p, double opacity,
          double shininess, double metallic, double fresnel0) :
    drawElementLC(t), opacity(opacity), shininess(shininess),
    metallic(metallic), fresnel0(fresnel0) {
    init(p);
  }
  
  drawPRC(const vm::array&p, double opacity,
          double shininess, double metallic, double fresnel0) :
    drawElementLC(NULL), opacity(opacity), shininess(shininess),
    metallic(metallic), fresnel0(fresnel0) {
    init(p);
  }
  
  drawPRC(const double* t, const drawPRC *s) :
    drawElementLC(t,s), diffuse(s->diffuse),
    emissive(s->emissive), specular(s->specular), opacity(s->opacity),
    shininess(s->shininess), metallic(s->metallic), fresnel0(s->fresnel0),
    invisible(s->invisible) {
  }
  
  virtual void P(triple& t, double x, double y, double z);

  virtual bool write(prcfile *out, unsigned int *, double, groupsmap&) {
    return true;
  }

  virtual bool write(jsfile *out) {return true;}

  virtual void transformedbounds(const double*, bbox3&) {}
  virtual void transformedratio(const double*, pair&,
                                double (*)(double, double), double, bool&) {}

};
  
// Output a unit sphere primitive.
class drawSphere : public drawPRC {
  bool half;
  int type;
public:
  drawSphere(const vm::array& t, bool half, const vm::array&p, double opacity,
             double shininess, double metallic, double fresnel0, int type) :
    drawPRC(t,p,opacity,shininess,metallic,fresnel0), half(half), type(type) {}

  drawSphere(const double* t, const drawSphere *s) :
    drawElement(s->KEY), drawPRC(t,s), half(s->half), type(s->type) {}
    
  void P(triple& t, double x, double y, double z);
  
  bool write(prcfile *out, unsigned int *, double, groupsmap&);
  bool write(jsfile *out);
  
  drawElement *transformed(const double* t) {
    return new drawSphere(t,this);
  }
};
  
// Output a unit cylinder primitive.
class drawCylinder : public drawPRC {
  bool core;
public:
  drawCylinder(const vm::array& t, const vm::array&p,
               double opacity, double shininess, double metallic,
               double fresnel0, bool core=false) :
    drawPRC(t,p,opacity,shininess,metallic,fresnel0), core(core) {}

  drawCylinder(const double* t, const drawCylinder *s) :
    drawPRC(t,s), core(s->core) {}
    
  bool write(prcfile *out, unsigned int *, double, groupsmap&);
  bool write(jsfile *out);
  
  drawElement *transformed(const double* t) {
    return new drawCylinder(t,this);
  }
};
  
// Draw a unit disk.
class drawDisk : public drawPRC {
public:
  drawDisk(const vm::array& t, const vm::array&p, double opacity,
           double shininess, double metallic, double fresnel0) :
    drawPRC(t,p,opacity,shininess,metallic,fresnel0) {}

  drawDisk(const double* t, const drawDisk *s) :
    drawPRC(t,s) {}
    
  bool write(prcfile *out, unsigned int *, double, groupsmap&);
  bool write(jsfile *out);
  
  drawElement *transformed(const double* t) {
    return new drawDisk(t,this);
  }
};
  
// Draw a tube.
class drawTube : public drawPRC {
protected:
  triple *g;
  double width;
  triple m,M;
  bool core;
public:
  drawTube(const vm::array&G, double width, const vm::array&p, double opacity,
           double shininess, double metallic, double fresnel0,
           const triple& m, const triple& M, bool core) :
    drawPRC(p,opacity,shininess,metallic,fresnel0), width(width), m(m), M(M),
    core(core) {
    if(vm::checkArray(&G) != 4)
      reportError("array of 4 triples required");

    g=new(UseGC) triple[4];
    for(size_t i=0; i < 4; ++i)
      g[i]=vm::read<triple>(G,i);
  }
  
  drawTube(const double* t, const drawTube *s) :
    drawElement(s->KEY), drawPRC(t,s), width(s->width), m(s->m), M(s->M),
    core(s->core) {
    g=new(UseGC) triple[4];
    for(size_t i=0; i < 4; ++i)
      g[i]=t*s->g[i];
  }
  
  bool write(jsfile *out);

  drawElement *transformed(const double* t) {
    return new drawTube(t,this);
  }
};

  
class drawBaseTriangles : public drawElement {
protected:
#ifdef HAVE_GL
  Triangles R;
  bool transparent;
#endif  
  
  size_t nP;
  triple* P;
  size_t nN;
  triple* N;
  size_t nI;
  size_t Ni;
  uint32_t (*PI)[3];
  uint32_t (*NI)[3];
  
  triple Min,Max;

  static const string wrongsize;
  static const string outofrange;
    
public:
  drawBaseTriangles(const vm::array& v, const vm::array& vi,
                    const vm::array& n, const vm::array& ni) {
    nP=checkArray(&v);
    P=new(UseGC) triple[nP];
    for(size_t i=0; i < nP; ++i)
      P[i]=vm::read<triple>(v,i);
  
    nI=checkArray(&vi);
    PI=new(UseGC) uint32_t[nI][3];
    for(size_t i=0; i < nI; ++i) {
      vm::array *vii=vm::read<vm::array*>(vi,i);
      if(checkArray(vii) != 3) reportError(wrongsize);
      uint32_t *PIi=PI[i];
      for(size_t j=0; j < 3; ++j) {
        size_t index=unsignedcast(vm::read<Int>(vii,j));
        if(index >= nP) reportError(outofrange);
        PIi[j]=index;
      }
    }
    
    nN=checkArray(&n);
    if(nN) {
      N=new(UseGC) triple[nN];
      for(size_t i=0; i < nN; ++i)
        N[i]=vm::read<triple>(n,i);
    
      Ni=checkArray(&ni);
      if(Ni == 0 && nN == nP)
        NI=PI;
      else {
        if(Ni != nI)
          reportError("Index arrays have different lengths");
        NI=new(UseGC) uint32_t[nI][3];
        for(size_t i=0; i < nI; ++i) {
          vm::array *nii=vm::read<vm::array*>(ni,i);
          if(checkArray(nii) != 3) reportError(wrongsize);
          uint32_t *NIi=NI[i];
          for(size_t j=0; j < 3; ++j) {
            size_t index=unsignedcast(vm::read<Int>(nii,j));
            if(index >= nN) reportError(outofrange);
            NIi[j]=index;
          }
        }
      }
    } else Ni=0;
  }

  drawBaseTriangles(const double* t, const drawBaseTriangles *s) :
    drawElement(s->KEY), nP(s->nP), nN(s->nN), nI(s->nI), Ni(s->Ni) {
    P=new(UseGC) triple[nP];
    for(size_t i=0; i < nP; i++)
      P[i]=t*s->P[i];
    
    PI=new(UseGC) uint32_t[nI][3];
    for(size_t i=0; i < nI; ++i) {
      uint32_t *PIi=PI[i];
      uint32_t *sPIi=s->PI[i];
      for(size_t j=0; j < 3; ++j)
        PIi[j]=sPIi[j];
    }

    if(nN) {
      N=new(UseGC) triple[nN];
      if(t == NULL) {
        for(size_t i=0; i < nN; i++)
          N[i]=s->N[i];
      } else {
        double T[]={t[0],t[1],t[2],
                    t[4],t[5],t[6],
                    t[8],t[9],t[10]};
        run::inverse(T,3);
        for(size_t i=0; i < nN; i++)
          N[i]=unit(Transform3(s->N[i],T));
      }

      if(Ni == 0) {
        NI=PI;
      } else {
        NI=new(UseGC) uint32_t[nI][3];
        for(size_t i=0; i < nI; ++i) {
          uint32_t *NIi=NI[i];
          uint32_t *sNIi=s->NI[i];
          for(size_t j=0; j < 3; ++j)
            NIi[j]=sNIi[j];
        }
      }
    }
  }
    
  bool is3D() {return true;}
  
  void bounds(const double* t, bbox3& b);
  
  void ratio(const double* t, pair &b, double (*m)(double, double),
             double fuzz, bool &first);
  
  virtual ~drawBaseTriangles() {}
  
  drawElement *transformed(const double* t) {
    return new drawBaseTriangles(t,this);
  }
};
  
class drawTriangles : public drawBaseTriangles {
  size_t nC;
  prc::RGBAColour*C;
  uint32_t (*CI)[3];
  size_t Ci;
   
  // Asymptote material data
  prc::RGBAColour diffuse;
  prc::RGBAColour emissive;
  prc::RGBAColour specular;
  double opacity;
  double shininess;
  double metallic;
  double fresnel0;
  bool invisible;
   
public:
  drawTriangles(const vm::array& v, const vm::array& vi,
                const vm::array& n, const vm::array& ni,
                const vm::array&p, double opacity, double shininess,
                double metallic, double fresnel0,
                const vm::array& c, const vm::array& ci) :
    drawBaseTriangles(v,vi,n,ni), opacity(opacity), shininess(shininess),
    metallic(metallic), fresnel0(fresnel0) {

    if(checkArray(&p) != 3)
      reportError(need3pens);
      
    const pen surfacepen=vm::read<camp::pen>(p,0);
    invisible=surfacepen.invisible();
    diffuse=rgba(surfacepen);
    
    nC=checkArray(&c);
    if(nC) {
      C=new(UseGC) prc::RGBAColour[nC];
      for(size_t i=0; i < nC; ++i)
        C[i]=rgba(vm::read<camp::pen>(c,i));
    
      size_t nI=checkArray(&vi);
    
      Ci=checkArray(&ci);
      if(Ci == 0 && nC == nP)
        CI=PI;
      else {
        if(Ci != nI)
          reportError("Index arrays have different lengths");
        CI=new(UseGC) uint32_t[nI][3];
        for(size_t i=0; i < nI; ++i) {
          vm::array *cii=vm::read<vm::array*>(ci,i);
          if(checkArray(cii) != 3) reportError(wrongsize);
          uint32_t *CIi=CI[i];
          for(size_t j=0; j < 3; ++j) {
            size_t index=unsignedcast(vm::read<Int>(cii,j));
            if(index >= nC) reportError(outofrange);
            CIi[j]=index;
          }
        }
      }
    } else {
      emissive=rgba(vm::read<camp::pen>(p,1));
    }
    specular=rgba(vm::read<camp::pen>(p,2));
  }
  
  drawTriangles(const double* t, const drawTriangles *s) :
    drawBaseTriangles(t,s), nC(s->nC),
    diffuse(s->diffuse), emissive(s->emissive),
    specular(s->specular), opacity(s->opacity), shininess(s->shininess), 
    metallic(s->metallic), fresnel0(s->fresnel0), invisible(s->invisible) {
    
    if(nC) {
      C=new(UseGC) prc::RGBAColour[nC];
      for(size_t i=0; i < nC; ++i)
        C[i]=s->C[i];
    
      CI=new(UseGC) uint32_t[nI][3];
      for(size_t i=0; i < nI; ++i) {
        uint32_t *CIi=CI[i];
        uint32_t *sCIi=s->CI[i];
        for(size_t j=0; j < 3; ++j)
          CIi[j]=sCIi[j];
      }
    }
  }
 
  virtual ~drawTriangles() {}
 
  void render(double size2, const triple& b, const triple& B,
              double perspective, bool remesh);
 
  bool write(prcfile *out, unsigned int *, double, groupsmap&);
  bool write(jsfile *out);
 
  drawElement *transformed(const double* t) {
    return new drawTriangles(t,this);
  }
};

}

#endif