Code cleanup: use r_ prefix for return args
[blender.git] / source / blender / blenkernel / intern / displist.c
1 /*
2  * ***** BEGIN GPL LICENSE BLOCK *****
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License
6  * as published by the Free Software Foundation; either version 2
7  * of the License, or (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software Foundation,
16  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17  *
18  * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
19  * All rights reserved.
20  *
21  * The Original Code is: all of this file.
22  *
23  * Contributor(s): none yet.
24  *
25  * ***** END GPL LICENSE BLOCK *****
26  */
27
28 /** \file blender/blenkernel/intern/displist.c
29  *  \ingroup bke
30  */
31
32
33 #include <math.h>
34 #include <stdio.h>
35 #include <string.h>
36
37 #include "MEM_guardedalloc.h"
38
39 #include "DNA_curve_types.h"
40 #include "DNA_meshdata_types.h"
41 #include "DNA_scene_types.h"
42 #include "DNA_object_types.h"
43 #include "DNA_material_types.h"
44 #include "DNA_vfont_types.h"
45
46 #include "BLI_blenlib.h"
47 #include "BLI_memarena.h"
48 #include "BLI_math.h"
49 #include "BLI_scanfill.h"
50 #include "BLI_utildefines.h"
51
52 #include "BKE_global.h"
53 #include "BKE_depsgraph.h"
54 #include "BKE_displist.h"
55 #include "BKE_cdderivedmesh.h"
56 #include "BKE_object.h"
57 #include "BKE_main.h"
58 #include "BKE_mball.h"
59 #include "BKE_material.h"
60 #include "BKE_curve.h"
61 #include "BKE_key.h"
62 #include "BKE_anim.h"
63 #include "BKE_font.h"
64 #include "BKE_lattice.h"
65 #include "BKE_modifier.h"
66
67 #include "BLI_sys_types.h" // for intptr_t support
68
69 static void boundbox_displist_object(Object *ob);
70
71 void BKE_displist_elem_free(DispList *dl)
72 {
73         if (dl) {
74                 if (dl->verts) MEM_freeN(dl->verts);
75                 if (dl->nors) MEM_freeN(dl->nors);
76                 if (dl->index) MEM_freeN(dl->index);
77                 if (dl->col1) MEM_freeN(dl->col1);
78                 if (dl->col2) MEM_freeN(dl->col2);
79                 if (dl->bevelSplitFlag) MEM_freeN(dl->bevelSplitFlag);
80                 MEM_freeN(dl);
81         }
82 }
83
84 void BKE_displist_free(ListBase *lb)
85 {
86         DispList *dl;
87
88         while ((dl = BLI_pophead(lb))) {
89                 BKE_displist_elem_free(dl);
90         }
91 }
92
93 DispList *BKE_displist_find_or_create(ListBase *lb, int type)
94 {
95         DispList *dl;
96
97         dl = lb->first;
98         while (dl) {
99                 if (dl->type == type)
100                         return dl;
101                 dl = dl->next;
102         }
103
104         dl = MEM_callocN(sizeof(DispList), "find_disp");
105         dl->type = type;
106         BLI_addtail(lb, dl);
107
108         return dl;
109 }
110
111 DispList *BKE_displist_find(ListBase *lb, int type)
112 {
113         DispList *dl;
114
115         dl = lb->first;
116         while (dl) {
117                 if (dl->type == type)
118                         return dl;
119                 dl = dl->next;
120         }
121
122         return NULL;
123 }
124
125 bool BKE_displist_has_faces(ListBase *lb)
126 {
127         DispList *dl;
128
129         for (dl = lb->first; dl; dl = dl->next) {
130                 if (ELEM3(dl->type, DL_INDEX3, DL_INDEX4, DL_SURF)) {
131                         return true;
132                 }
133         }
134
135         return false;
136 }
137
138 void BKE_displist_copy(ListBase *lbn, ListBase *lb)
139 {
140         DispList *dln, *dl;
141
142         BKE_displist_free(lbn);
143
144         dl = lb->first;
145         while (dl) {
146                 dln = MEM_dupallocN(dl);
147                 BLI_addtail(lbn, dln);
148                 dln->verts = MEM_dupallocN(dl->verts);
149                 dln->nors = MEM_dupallocN(dl->nors);
150                 dln->index = MEM_dupallocN(dl->index);
151                 dln->col1 = MEM_dupallocN(dl->col1);
152                 dln->col2 = MEM_dupallocN(dl->col2);
153
154                 if (dl->bevelSplitFlag)
155                         dln->bevelSplitFlag = MEM_dupallocN(dl->bevelSplitFlag);
156
157                 dl = dl->next;
158         }
159 }
160
161 void BKE_displist_normals_add(ListBase *lb)
162 {
163         DispList *dl = NULL;
164         float *vdata, *ndata, nor[3];
165         float *v1, *v2, *v3, *v4;
166         float *n1, *n2, *n3, *n4;
167         int a, b, p1, p2, p3, p4;
168
169         dl = lb->first;
170
171         while (dl) {
172                 if (dl->type == DL_INDEX3) {
173                         if (dl->nors == NULL) {
174                                 dl->nors = MEM_callocN(sizeof(float) * 3, "dlnors");
175
176                                 if (dl->verts[2] < 0.0f)
177                                         dl->nors[2] = -1.0f;
178                                 else
179                                         dl->nors[2] = 1.0f;
180                         }
181                 }
182                 else if (dl->type == DL_SURF) {
183                         if (dl->nors == NULL) {
184                                 dl->nors = MEM_callocN(sizeof(float) * 3 * dl->nr * dl->parts, "dlnors");
185
186                                 vdata = dl->verts;
187                                 ndata = dl->nors;
188
189                                 for (a = 0; a < dl->parts; a++) {
190
191                                         if (BKE_displist_surfindex_get(dl, a, &b, &p1, &p2, &p3, &p4) == 0)
192                                                 break;
193
194                                         v1 = vdata + 3 * p1;
195                                         n1 = ndata + 3 * p1;
196                                         v2 = vdata + 3 * p2;
197                                         n2 = ndata + 3 * p2;
198                                         v3 = vdata + 3 * p3;
199                                         n3 = ndata + 3 * p3;
200                                         v4 = vdata + 3 * p4;
201                                         n4 = ndata + 3 * p4;
202
203                                         for (; b < dl->nr; b++) {
204                                                 normal_quad_v3(nor, v1, v3, v4, v2);
205
206                                                 add_v3_v3(n1, nor);
207                                                 add_v3_v3(n2, nor);
208                                                 add_v3_v3(n3, nor);
209                                                 add_v3_v3(n4, nor);
210
211                                                 v2 = v1; v1 += 3;
212                                                 v4 = v3; v3 += 3;
213                                                 n2 = n1; n1 += 3;
214                                                 n4 = n3; n3 += 3;
215                                         }
216                                 }
217                                 a = dl->parts * dl->nr;
218                                 v1 = ndata;
219                                 while (a--) {
220                                         normalize_v3(v1);
221                                         v1 += 3;
222                                 }
223                         }
224                 }
225                 dl = dl->next;
226         }
227 }
228
229 void BKE_displist_count(ListBase *lb, int *totvert, int *totface, int *tottri)
230 {
231         DispList *dl;
232
233         for (dl = lb->first; dl; dl = dl->next) {
234                 int vert_tot = 0;
235                 int face_tot = 0;
236                 int tri_tot = 0;
237
238                 switch (dl->type) {
239                         case DL_SURF:
240                         {
241                                 vert_tot = dl->nr * dl->parts;
242                                 face_tot = (dl->nr - 1) * (dl->parts - 1);
243                                 tri_tot  = face_tot * 2;
244                                 break;
245                         }
246                         case DL_INDEX3:
247                         {
248                                 vert_tot = dl->nr;
249                                 face_tot = dl->parts;
250                                 tri_tot  = face_tot;
251                                 break;
252                         }
253                         case DL_INDEX4:
254                         {
255                                 vert_tot = dl->nr;
256                                 face_tot = dl->parts;
257                                 tri_tot  = face_tot * 2;
258                                 break;
259                         }
260                         case DL_POLY:
261                         case DL_SEGM:
262                         {
263                                 vert_tot = dl->nr * dl->parts;
264                                 break;
265                         }
266                 }
267
268                 *totvert += vert_tot;
269                 *totface += face_tot;
270                 *tottri  += tri_tot;
271         }
272 }
273
274 bool BKE_displist_surfindex_get(DispList *dl, int a, int *b, int *p1, int *p2, int *p3, int *p4)
275 {
276         if ((dl->flag & DL_CYCL_V) == 0 && a == (dl->parts) - 1) {
277                 return false;
278         }
279
280         if (dl->flag & DL_CYCL_U) {
281                 (*p1) = dl->nr * a;
282                 (*p2) = (*p1) + dl->nr - 1;
283                 (*p3) = (*p1) + dl->nr;
284                 (*p4) = (*p2) + dl->nr;
285                 (*b) = 0;
286         }
287         else {
288                 (*p2) = dl->nr * a;
289                 (*p1) = (*p2) + 1;
290                 (*p4) = (*p2) + dl->nr;
291                 (*p3) = (*p1) + dl->nr;
292                 (*b) = 1;
293         }
294
295         if ((dl->flag & DL_CYCL_V) && a == dl->parts - 1) {
296                 (*p3) -= dl->nr * dl->parts;
297                 (*p4) -= dl->nr * dl->parts;
298         }
299
300         return true;
301 }
302
303 /* ****************** make displists ********************* */
304
305 static void curve_to_displist(Curve *cu, ListBase *nubase, ListBase *dispbase, int forRender, int renderResolution)
306 {
307         Nurb *nu;
308         DispList *dl;
309         BezTriple *bezt, *prevbezt;
310         BPoint *bp;
311         float *data;
312         int a, len, resolu;
313         const int editmode = (!forRender && (cu->editnurb || cu->editfont));
314
315         nu = nubase->first;
316         while (nu) {
317                 if (nu->hide == 0 || editmode == 0) {
318                         if (renderResolution && cu->resolu_ren != 0)
319                                 resolu = cu->resolu_ren;
320                         else
321                                 resolu = nu->resolu;
322
323                         if (!BKE_nurb_check_valid_u(nu)) {
324                                 /* pass */
325                         }
326                         else if (nu->type == CU_BEZIER) {
327                                 /* count */
328                                 len = 0;
329                                 a = nu->pntsu - 1;
330                                 if (nu->flagu & CU_NURB_CYCLIC) a++;
331
332                                 prevbezt = nu->bezt;
333                                 bezt = prevbezt + 1;
334                                 while (a--) {
335                                         if (a == 0 && (nu->flagu & CU_NURB_CYCLIC))
336                                                 bezt = nu->bezt;
337
338                                         if (prevbezt->h2 == HD_VECT && bezt->h1 == HD_VECT)
339                                                 len++;
340                                         else
341                                                 len += resolu;
342
343                                         if (a == 0 && (nu->flagu & CU_NURB_CYCLIC) == 0)
344                                                 len++;
345
346                                         prevbezt = bezt;
347                                         bezt++;
348                                 }
349
350                                 dl = MEM_callocN(sizeof(DispList), "makeDispListbez");
351                                 /* len+1 because of 'forward_diff_bezier' function */
352                                 dl->verts = MEM_callocN((len + 1) * 3 * sizeof(float), "dlverts");
353                                 BLI_addtail(dispbase, dl);
354                                 dl->parts = 1;
355                                 dl->nr = len;
356                                 dl->col = nu->mat_nr;
357                                 dl->charidx = nu->charidx;
358
359                                 data = dl->verts;
360
361                                 if (nu->flagu & CU_NURB_CYCLIC) {
362                                         dl->type = DL_POLY;
363                                         a = nu->pntsu;
364                                 }
365                                 else {
366                                         dl->type = DL_SEGM;
367                                         a = nu->pntsu - 1;
368                                 }
369
370                                 prevbezt = nu->bezt;
371                                 bezt = prevbezt + 1;
372
373                                 while (a--) {
374                                         if (a == 0 && dl->type == DL_POLY)
375                                                 bezt = nu->bezt;
376
377                                         if (prevbezt->h2 == HD_VECT && bezt->h1 == HD_VECT) {
378                                                 copy_v3_v3(data, prevbezt->vec[1]);
379                                                 data += 3;
380                                         }
381                                         else {
382                                                 int j;
383                                                 for (j = 0; j < 3; j++) {
384                                                         BKE_curve_forward_diff_bezier(prevbezt->vec[1][j],
385                                                                                       prevbezt->vec[2][j],
386                                                                                       bezt->vec[0][j],
387                                                                                       bezt->vec[1][j],
388                                                                                       data + j, resolu, 3 * sizeof(float));
389                                                 }
390
391                                                 data += 3 * resolu;
392                                         }
393
394                                         if (a == 0 && dl->type == DL_SEGM) {
395                                                 copy_v3_v3(data, bezt->vec[1]);
396                                         }
397
398                                         prevbezt = bezt;
399                                         bezt++;
400                                 }
401                         }
402                         else if (nu->type == CU_NURBS) {
403                                 len = (resolu * SEGMENTSU(nu));
404
405                                 dl = MEM_callocN(sizeof(DispList), "makeDispListsurf");
406                                 dl->verts = MEM_callocN(len * 3 * sizeof(float), "dlverts");
407                                 BLI_addtail(dispbase, dl);
408                                 dl->parts = 1;
409
410                                 dl->nr = len;
411                                 dl->col = nu->mat_nr;
412                                 dl->charidx = nu->charidx;
413
414                                 data = dl->verts;
415                                 if (nu->flagu & CU_NURB_CYCLIC)
416                                         dl->type = DL_POLY;
417                                 else dl->type = DL_SEGM;
418                                 BKE_nurb_makeCurve(nu, data, NULL, NULL, NULL, resolu, 3 * sizeof(float));
419                         }
420                         else if (nu->type == CU_POLY) {
421                                 len = nu->pntsu;
422                                 dl = MEM_callocN(sizeof(DispList), "makeDispListpoly");
423                                 dl->verts = MEM_callocN(len * 3 * sizeof(float), "dlverts");
424                                 BLI_addtail(dispbase, dl);
425                                 dl->parts = 1;
426                                 dl->nr = len;
427                                 dl->col = nu->mat_nr;
428                                 dl->charidx = nu->charidx;
429
430                                 data = dl->verts;
431                                 if (nu->flagu & CU_NURB_CYCLIC) dl->type = DL_POLY;
432                                 else dl->type = DL_SEGM;
433
434                                 a = len;
435                                 bp = nu->bp;
436                                 while (a--) {
437                                         copy_v3_v3(data, bp->vec);
438                                         bp++;
439                                         data += 3;
440                                 }
441                         }
442                 }
443                 nu = nu->next;
444         }
445 }
446
447 /**
448  * \param normal_proj  Optional normal thats used to project the scanfill verts into 2d coords.
449  * Pass this along if known since it saves time calculating the normal.
450  * \param flipnormal  Flip the normal (same as passing \a normal_proj negated)
451  */
452 void BKE_displist_fill(ListBase *dispbase, ListBase *to, const float normal_proj[3], const bool flipnormal)
453 {
454         ScanFillContext sf_ctx;
455         ScanFillVert *sf_vert, *sf_vert_new, *sf_vert_last;
456         ScanFillFace *sf_tri;
457         MemArena *sf_arena;
458         DispList *dlnew = NULL, *dl;
459         float *f1;
460         int colnr = 0, charidx = 0, cont = 1, tot, a, *index, nextcol = 0;
461         int totvert;
462         const int scanfill_flag = BLI_SCANFILL_CALC_REMOVE_DOUBLES | BLI_SCANFILL_CALC_POLYS | BLI_SCANFILL_CALC_HOLES;
463
464         if (dispbase == NULL)
465                 return;
466         if (BLI_listbase_is_empty(dispbase))
467                 return;
468
469         sf_arena = BLI_memarena_new(BLI_SCANFILL_ARENA_SIZE, __func__);
470
471         while (cont) {
472                 cont = 0;
473                 totvert = 0;
474                 nextcol = 0;
475
476                 BLI_scanfill_begin_arena(&sf_ctx, sf_arena);
477
478                 dl = dispbase->first;
479                 while (dl) {
480                         if (dl->type == DL_POLY) {
481                                 if (charidx < dl->charidx)
482                                         cont = 1;
483                                 else if (charidx == dl->charidx) { /* character with needed index */
484                                         if (colnr == dl->col) {
485
486                                                 sf_ctx.poly_nr++;
487
488                                                 /* make editverts and edges */
489                                                 f1 = dl->verts;
490                                                 a = dl->nr;
491                                                 sf_vert = sf_vert_new = NULL;
492
493                                                 while (a--) {
494                                                         sf_vert_last = sf_vert;
495
496                                                         sf_vert = BLI_scanfill_vert_add(&sf_ctx, f1);
497                                                         totvert++;
498
499                                                         if (sf_vert_last == NULL)
500                                                                 sf_vert_new = sf_vert;
501                                                         else {
502                                                                 BLI_scanfill_edge_add(&sf_ctx, sf_vert_last, sf_vert);
503                                                         }
504                                                         f1 += 3;
505                                                 }
506
507                                                 if (sf_vert != NULL && sf_vert_new != NULL) {
508                                                         BLI_scanfill_edge_add(&sf_ctx, sf_vert, sf_vert_new);
509                                                 }
510                                         }
511                                         else if (colnr < dl->col) {
512                                                 /* got poly with next material at current char */
513                                                 cont = 1;
514                                                 nextcol = 1;
515                                         }
516                                 }
517                         }
518                         dl = dl->next;
519                 }
520
521                 /* XXX (obedit && obedit->actcol) ? (obedit->actcol-1) : 0)) { */
522                 if (totvert && (tot = BLI_scanfill_calc_ex(&sf_ctx,
523                                                            scanfill_flag,
524                                                            normal_proj)))
525                 {
526                         if (tot) {
527                                 dlnew = MEM_callocN(sizeof(DispList), "filldisplist");
528                                 dlnew->type = DL_INDEX3;
529                                 dlnew->col = colnr;
530                                 dlnew->nr = totvert;
531                                 dlnew->parts = tot;
532
533                                 dlnew->index = MEM_mallocN(tot * 3 * sizeof(int), "dlindex");
534                                 dlnew->verts = MEM_mallocN(totvert * 3 * sizeof(float), "dlverts");
535
536                                 /* vert data */
537                                 f1 = dlnew->verts;
538                                 totvert = 0;
539
540                                 for (sf_vert = sf_ctx.fillvertbase.first; sf_vert; sf_vert = sf_vert->next) {
541                                         copy_v3_v3(f1, sf_vert->co);
542                                         f1 += 3;
543
544                                         /* index number */
545                                         sf_vert->tmp.i = totvert;
546                                         totvert++;
547                                 }
548
549                                 /* index data */
550
551                                 index = dlnew->index;
552                                 for (sf_tri = sf_ctx.fillfacebase.first; sf_tri; sf_tri = sf_tri->next) {
553                                         index[0] = sf_tri->v1->tmp.i;
554                                         index[1] = sf_tri->v2->tmp.i;
555                                         index[2] = sf_tri->v3->tmp.i;
556
557                                         if (flipnormal)
558                                                 SWAP(int, index[0], index[2]);
559
560                                         index += 3;
561                                 }
562                         }
563
564                         BLI_addhead(to, dlnew);
565                 }
566                 BLI_scanfill_end_arena(&sf_ctx, sf_arena);
567
568                 if (nextcol) {
569                         /* stay at current char but fill polys with next material */
570                         colnr++;
571                 }
572                 else {
573                         /* switch to next char and start filling from first material */
574                         charidx++;
575                         colnr = 0;
576                 }
577         }
578
579         BLI_memarena_free(sf_arena);
580
581         /* do not free polys, needed for wireframe display */
582 }
583
584 static void bevels_to_filledpoly(Curve *cu, ListBase *dispbase)
585 {
586         const float z_up[3] = {0.0f, 0.0f, 1.0f};
587         ListBase front, back;
588         DispList *dl, *dlnew;
589         float *fp, *fp1;
590         int a, dpoly;
591
592         BLI_listbase_clear(&front);
593         BLI_listbase_clear(&back);
594
595         dl = dispbase->first;
596         while (dl) {
597                 if (dl->type == DL_SURF) {
598                         if ((dl->flag & DL_CYCL_V) && (dl->flag & DL_CYCL_U) == 0) {
599                                 if ( (cu->flag & CU_BACK) && (dl->flag & DL_BACK_CURVE)) {
600                                         dlnew = MEM_callocN(sizeof(DispList), "filldisp");
601                                         BLI_addtail(&front, dlnew);
602                                         dlnew->verts = fp1 = MEM_mallocN(sizeof(float) * 3 * dl->parts, "filldisp1");
603                                         dlnew->nr = dl->parts;
604                                         dlnew->parts = 1;
605                                         dlnew->type = DL_POLY;
606                                         dlnew->col = dl->col;
607                                         dlnew->charidx = dl->charidx;
608
609                                         fp = dl->verts;
610                                         dpoly = 3 * dl->nr;
611
612                                         a = dl->parts;
613                                         while (a--) {
614                                                 copy_v3_v3(fp1, fp);
615                                                 fp1 += 3;
616                                                 fp += dpoly;
617                                         }
618                                 }
619                                 if ((cu->flag & CU_FRONT) && (dl->flag & DL_FRONT_CURVE)) {
620                                         dlnew = MEM_callocN(sizeof(DispList), "filldisp");
621                                         BLI_addtail(&back, dlnew);
622                                         dlnew->verts = fp1 = MEM_mallocN(sizeof(float) * 3 * dl->parts, "filldisp1");
623                                         dlnew->nr = dl->parts;
624                                         dlnew->parts = 1;
625                                         dlnew->type = DL_POLY;
626                                         dlnew->col = dl->col;
627                                         dlnew->charidx = dl->charidx;
628
629                                         fp = dl->verts + 3 * (dl->nr - 1);
630                                         dpoly = 3 * dl->nr;
631
632                                         a = dl->parts;
633                                         while (a--) {
634                                                 copy_v3_v3(fp1, fp);
635                                                 fp1 += 3;
636                                                 fp += dpoly;
637                                         }
638                                 }
639                         }
640                 }
641                 dl = dl->next;
642         }
643
644         BKE_displist_fill(&front, dispbase, z_up, true);
645         BKE_displist_fill(&back, dispbase, z_up, false);
646
647         BKE_displist_free(&front);
648         BKE_displist_free(&back);
649
650         BKE_displist_fill(dispbase, dispbase, z_up, false);
651 }
652
653 static void curve_to_filledpoly(Curve *cu, ListBase *UNUSED(nurb), ListBase *dispbase)
654 {
655         if (!CU_DO_2DFILL(cu))
656                 return;
657
658         if (dispbase->first && ((DispList *) dispbase->first)->type == DL_SURF) {
659                 bevels_to_filledpoly(cu, dispbase);
660         }
661         else {
662                 /* TODO, investigate passing zup instead of NULL */
663                 BKE_displist_fill(dispbase, dispbase, NULL, false);
664         }
665 }
666
667 /* taper rules:
668  * - only 1 curve
669  * - first point left, last point right
670  * - based on subdivided points in original curve, not on points in taper curve (still)
671  */
672 static float displist_calc_taper(Scene *scene, Object *taperobj, float fac)
673 {
674         DispList *dl;
675
676         if (taperobj == NULL || taperobj->type != OB_CURVE)
677                 return 1.0;
678
679         dl = taperobj->curve_cache ? taperobj->curve_cache->disp.first : NULL;
680         if (dl == NULL) {
681                 BKE_displist_make_curveTypes(scene, taperobj, 0);
682                 dl = taperobj->curve_cache->disp.first;
683         }
684         if (dl) {
685                 float minx, dx, *fp;
686                 int a;
687
688                 /* horizontal size */
689                 minx = dl->verts[0];
690                 dx = dl->verts[3 * (dl->nr - 1)] - minx;
691                 if (dx > 0.0f) {
692                         fp = dl->verts;
693                         for (a = 0; a < dl->nr; a++, fp += 3) {
694                                 if ((fp[0] - minx) / dx >= fac) {
695                                         /* interpolate with prev */
696                                         if (a > 0) {
697                                                 float fac1 = (fp[-3] - minx) / dx;
698                                                 float fac2 = (fp[0] - minx) / dx;
699                                                 if (fac1 != fac2)
700                                                         return fp[1] * (fac1 - fac) / (fac1 - fac2) + fp[-2] * (fac - fac2) / (fac1 - fac2);
701                                         }
702                                         return fp[1];
703                                 }
704                         }
705                         return fp[-2];  // last y coord
706                 }
707         }
708
709         return 1.0;
710 }
711
712 float BKE_displist_calc_taper(Scene *scene, Object *taperobj, int cur, int tot)
713 {
714         float fac = ((float)cur) / (float)(tot - 1);
715
716         return displist_calc_taper(scene, taperobj, fac);
717 }
718
719 void BKE_displist_make_mball(EvaluationContext *eval_ctx, Scene *scene, Object *ob)
720 {
721         if (!ob || ob->type != OB_MBALL)
722                 return;
723
724         if (ob->curve_cache) {
725                 BKE_displist_free(&(ob->curve_cache->disp));
726         }
727         else {
728                 ob->curve_cache = MEM_callocN(sizeof(CurveCache), "CurveCache for MBall");
729         }
730
731         if (ob->type == OB_MBALL) {
732                 if (ob == BKE_mball_basis_find(scene, ob)) {
733                         BKE_mball_polygonize(eval_ctx, scene, ob, &ob->curve_cache->disp);
734                         BKE_mball_texspace_calc(ob);
735
736                         object_deform_mball(ob, &ob->curve_cache->disp);
737                 }
738
739                 boundbox_displist_object(ob);
740         }
741 }
742
743 void BKE_displist_make_mball_forRender(EvaluationContext *eval_ctx, Scene *scene, Object *ob, ListBase *dispbase)
744 {
745         BKE_mball_polygonize(eval_ctx, scene, ob, dispbase);
746         BKE_mball_texspace_calc(ob);
747
748         object_deform_mball(ob, dispbase);
749 }
750
751 static ModifierData *curve_get_tessellate_point(Scene *scene, Object *ob, int renderResolution, int editmode)
752 {
753         VirtualModifierData virtualModifierData;
754         ModifierData *md = modifiers_getVirtualModifierList(ob, &virtualModifierData);
755         ModifierData *pretessellatePoint;
756         int required_mode;
757
758         if (renderResolution)
759                 required_mode = eModifierMode_Render;
760         else
761                 required_mode = eModifierMode_Realtime;
762
763         if (editmode)
764                 required_mode |= eModifierMode_Editmode;
765
766         pretessellatePoint = NULL;
767         for (; md; md = md->next) {
768                 ModifierTypeInfo *mti = modifierType_getInfo(md->type);
769
770                 if (!modifier_isEnabled(scene, md, required_mode))
771                         continue;
772                 if (mti->type == eModifierTypeType_Constructive)
773                         return pretessellatePoint;
774
775                 if (ELEM3(md->type, eModifierType_Hook, eModifierType_Softbody, eModifierType_MeshDeform)) {
776                         pretessellatePoint = md;
777
778                         /* this modifiers are moving point of tessellation automatically
779                          * (some of them even can't be applied on tessellated curve), set flag
780                          * for information button in modifier's header
781                          */
782                         md->mode |= eModifierMode_ApplyOnSpline;
783                 }
784                 else if (md->mode & eModifierMode_ApplyOnSpline) {
785                         pretessellatePoint = md;
786                 }
787         }
788
789         return pretessellatePoint;
790 }
791
792 static void curve_calc_modifiers_pre(Scene *scene, Object *ob, ListBase *nurb,
793                                      int forRender, int renderResolution)
794 {
795         VirtualModifierData virtualModifierData;
796         ModifierData *md = modifiers_getVirtualModifierList(ob, &virtualModifierData);
797         ModifierData *pretessellatePoint;
798         Curve *cu = ob->data;
799         int numVerts = 0;
800         const int editmode = (!forRender && (cu->editnurb || cu->editfont));
801         ModifierApplyFlag app_flag = 0;
802         float (*deformedVerts)[3] = NULL;
803         float *keyVerts = NULL;
804         int required_mode;
805
806         modifiers_clearErrors(ob);
807
808         if (editmode)
809                 app_flag |= MOD_APPLY_USECACHE;
810         if (renderResolution) {
811                 app_flag |= MOD_APPLY_RENDER;
812                 required_mode = eModifierMode_Render;
813         }
814         else
815                 required_mode = eModifierMode_Realtime;
816
817         pretessellatePoint = curve_get_tessellate_point(scene, ob, renderResolution, editmode);
818
819         if (editmode)
820                 required_mode |= eModifierMode_Editmode;
821
822         if (cu->editnurb == NULL) {
823                 keyVerts = BKE_key_evaluate_object(scene, ob, &numVerts);
824
825                 if (keyVerts) {
826                         /* split coords from key data, the latter also includes
827                          * tilts, which is passed through in the modifier stack.
828                          * this is also the reason curves do not use a virtual
829                          * shape key modifier yet. */
830                         deformedVerts = BKE_curve_nurbs_keyVertexCos_get(nurb, keyVerts);
831                         BLI_assert(BKE_nurbList_verts_count(nurb) == numVerts);
832                 }
833         }
834
835         if (pretessellatePoint) {
836                 for (; md; md = md->next) {
837                         ModifierTypeInfo *mti = modifierType_getInfo(md->type);
838
839                         md->scene = scene;
840
841                         if (!modifier_isEnabled(scene, md, required_mode))
842                                 continue;
843                         if (mti->type != eModifierTypeType_OnlyDeform)
844                                 continue;
845
846                         if (!deformedVerts) {
847                                 deformedVerts = BKE_curve_nurbs_vertexCos_get(nurb, &numVerts);
848                         }
849
850                         mti->deformVerts(md, ob, NULL, deformedVerts, numVerts, app_flag);
851
852                         if (md == pretessellatePoint)
853                                 break;
854                 }
855         }
856
857         if (deformedVerts) {
858                 BK_curve_nurbs_vertexCos_apply(nurb, deformedVerts);
859                 MEM_freeN(deformedVerts);
860         }
861         if (keyVerts) /* these are not passed through modifier stack */
862                 BKE_curve_nurbs_keyVertexTilts_apply(nurb, keyVerts);
863
864         if (keyVerts)
865                 MEM_freeN(keyVerts);
866 }
867
868 static float (*displist_get_allverts(ListBase *dispbase, int *totvert))[3]
869 {
870         DispList *dl;
871         float (*allverts)[3], *fp;
872
873         *totvert = 0;
874
875         for (dl = dispbase->first; dl; dl = dl->next)
876                 *totvert += (dl->type == DL_INDEX3) ? dl->nr : dl->parts * dl->nr;
877
878         allverts = MEM_mallocN((*totvert) * sizeof(float) * 3, "displist_get_allverts allverts");
879         fp = (float *)allverts;
880         for (dl = dispbase->first; dl; dl = dl->next) {
881                 int offs = 3 * ((dl->type == DL_INDEX3) ? dl->nr : dl->parts * dl->nr);
882                 memcpy(fp, dl->verts, sizeof(float) * offs);
883                 fp += offs;
884         }
885
886         return allverts;
887 }
888
889 static void displist_apply_allverts(ListBase *dispbase, float (*allverts)[3])
890 {
891         DispList *dl;
892         float *fp;
893
894         fp = (float *)allverts;
895         for (dl = dispbase->first; dl; dl = dl->next) {
896                 int offs = 3 * ((dl->type == DL_INDEX3) ? dl->nr : dl->parts * dl->nr);
897                 memcpy(dl->verts, fp, sizeof(float) * offs);
898                 fp += offs;
899         }
900 }
901
902 static void curve_calc_modifiers_post(Scene *scene, Object *ob, ListBase *nurb,
903                                       ListBase *dispbase, DerivedMesh **derivedFinal,
904                                       int forRender, int renderResolution)
905 {
906         VirtualModifierData virtualModifierData;
907         ModifierData *md = modifiers_getVirtualModifierList(ob, &virtualModifierData);
908         ModifierData *pretessellatePoint;
909         Curve *cu = ob->data;
910         int required_mode = 0, totvert = 0;
911         int editmode = (!forRender && (cu->editnurb || cu->editfont));
912         DerivedMesh *dm = NULL, *ndm;
913         float (*vertCos)[3] = NULL;
914         int useCache = !forRender;
915         ModifierApplyFlag app_flag = 0;
916
917         if (renderResolution) {
918                 app_flag |= MOD_APPLY_RENDER;
919                 required_mode = eModifierMode_Render;
920         }
921         else
922                 required_mode = eModifierMode_Realtime;
923
924         pretessellatePoint = curve_get_tessellate_point(scene, ob, renderResolution, editmode);
925
926         if (editmode)
927                 required_mode |= eModifierMode_Editmode;
928
929         if (pretessellatePoint) {
930                 md = pretessellatePoint->next;
931         }
932
933         if (derivedFinal && *derivedFinal) {
934                 (*derivedFinal)->release(*derivedFinal);
935         }
936
937         for (; md; md = md->next) {
938                 ModifierTypeInfo *mti = modifierType_getInfo(md->type);
939                 ModifierApplyFlag appf = app_flag;
940
941                 md->scene = scene;
942
943                 if (!modifier_isEnabled(scene, md, required_mode))
944                         continue;
945
946                 if (mti->type == eModifierTypeType_OnlyDeform ||
947                     (mti->type == eModifierTypeType_DeformOrConstruct && !dm))
948                 {
949                         if (editmode)
950                                 appf |= MOD_APPLY_USECACHE;
951                         if (dm) {
952                                 if (!vertCos) {
953                                         totvert = dm->getNumVerts(dm);
954                                         vertCos = MEM_mallocN(sizeof(*vertCos) * totvert, "dfmv");
955                                         dm->getVertCos(dm, vertCos);
956                                 }
957
958                                 mti->deformVerts(md, ob, dm, vertCos, totvert, appf);
959                         }
960                         else {
961                                 if (!vertCos) {
962                                         vertCos = displist_get_allverts(dispbase, &totvert);
963                                 }
964
965                                 mti->deformVerts(md, ob, NULL, vertCos, totvert, appf);
966                         }
967                 }
968                 else {
969                         if (!derivedFinal) {
970                                 /* makeDisplistCurveTypes could be used for beveling, where derived mesh
971                                  * is totally unnecessary, so we could stop modifiers applying
972                                  * when we found constructive modifier but derived mesh is unwanted result
973                                  */
974                                 break;
975                         }
976
977                         if (dm) {
978                                 if (vertCos) {
979                                         DerivedMesh *tdm = CDDM_copy(dm);
980                                         dm->release(dm);
981                                         dm = tdm;
982
983                                         CDDM_apply_vert_coords(dm, vertCos);
984                                 }
985                         }
986                         else {
987                                 if (vertCos) {
988                                         displist_apply_allverts(dispbase, vertCos);
989                                 }
990
991                                 if (ELEM(ob->type, OB_CURVE, OB_FONT) && (cu->flag & CU_DEFORM_FILL)) {
992                                         curve_to_filledpoly(cu, nurb, dispbase);
993                                 }
994
995                                 dm = CDDM_from_curve_displist(ob, dispbase);
996                         }
997
998                         if (vertCos) {
999                                 /* Vertex coordinates were applied to necessary data, could free it */
1000                                 MEM_freeN(vertCos);
1001                                 vertCos = NULL;
1002                         }
1003
1004                         if (useCache)
1005                                 appf |= MOD_APPLY_USECACHE;
1006
1007                         ndm = modwrap_applyModifier(md, ob, dm, appf);
1008
1009                         if (ndm) {
1010                                 /* Modifier returned a new derived mesh */
1011
1012                                 if (dm && dm != ndm) /* Modifier  */
1013                                         dm->release(dm);
1014                                 dm = ndm;
1015                         }
1016                 }
1017         }
1018
1019         if (vertCos) {
1020                 if (dm) {
1021                         DerivedMesh *tdm = CDDM_copy(dm);
1022                         dm->release(dm);
1023                         dm = tdm;
1024
1025                         CDDM_apply_vert_coords(dm, vertCos);
1026                         CDDM_calc_normals_mapping(dm);
1027                         MEM_freeN(vertCos);
1028                 }
1029                 else {
1030                         displist_apply_allverts(dispbase, vertCos);
1031                         MEM_freeN(vertCos);
1032                         vertCos = NULL;
1033                 }
1034         }
1035
1036         if (derivedFinal) {
1037                 if (dm) {
1038                         /* see: mesh_calc_modifiers */
1039                         if (dm->getNumTessFaces(dm) == 0) {
1040                                 dm->recalcTessellation(dm);
1041                         }
1042                         /* Even if tessellation is not needed, some modifiers might have modified CD layers
1043                          * (like mloopcol or mloopuv), hence we have to update those. */
1044                         else if (dm->dirty & DM_DIRTY_TESS_CDLAYERS) {
1045                                 DM_update_tessface_data(dm);
1046                         }
1047
1048                         if (dm->type == DM_TYPE_CDDM) {
1049                                 CDDM_calc_normals_mapping_ex(dm, (dm->dirty & DM_DIRTY_NORMALS) ? false : true);
1050                         }
1051                 }
1052                 (*derivedFinal) = dm;
1053         }
1054 }
1055
1056 static void displist_surf_indices(DispList *dl)
1057 {
1058         int a, b, p1, p2, p3, p4;
1059         int *index;
1060
1061         dl->totindex = 0;
1062
1063         index = dl->index = MEM_mallocN(4 * sizeof(int) * (dl->parts + 1) * (dl->nr + 1), "index array nurbs");
1064
1065         for (a = 0; a < dl->parts; a++) {
1066
1067                 if (BKE_displist_surfindex_get(dl, a, &b, &p1, &p2, &p3, &p4) == 0)
1068                         break;
1069
1070                 for (; b < dl->nr; b++, index += 4) {
1071                         index[0] = p1;
1072                         index[1] = p2;
1073                         index[2] = p4;
1074                         index[3] = p3;
1075
1076                         dl->totindex++;
1077
1078                         p2 = p1; p1++;
1079                         p4 = p3; p3++;
1080                 }
1081         }
1082 }
1083
1084 static DerivedMesh *create_orco_dm(Scene *scene, Object *ob)
1085 {
1086         DerivedMesh *dm;
1087         ListBase disp = {NULL, NULL};
1088
1089         /* OrcoDM should be created from underformed disp lists */
1090         BKE_displist_make_curveTypes_forOrco(scene, ob, &disp);
1091         dm = CDDM_from_curve_displist(ob, &disp);
1092
1093         BKE_displist_free(&disp);
1094
1095         return dm;
1096 }
1097
1098 static void add_orco_dm(Object *ob, DerivedMesh *dm, DerivedMesh *orcodm)
1099 {
1100         float (*orco)[3], (*layerorco)[3];
1101         int totvert, a;
1102         Curve *cu = ob->data;
1103
1104         totvert = dm->getNumVerts(dm);
1105
1106         orco = MEM_callocN(sizeof(float) * 3 * totvert, "dm orco");
1107
1108         if (orcodm->getNumVerts(orcodm) == totvert)
1109                 orcodm->getVertCos(orcodm, orco);
1110         else
1111                 dm->getVertCos(dm, orco);
1112
1113         for (a = 0; a < totvert; a++) {
1114                 float *co = orco[a];
1115                 co[0] = (co[0] - cu->loc[0]) / cu->size[0];
1116                 co[1] = (co[1] - cu->loc[1]) / cu->size[1];
1117                 co[2] = (co[2] - cu->loc[2]) / cu->size[2];
1118         }
1119
1120         if ((layerorco = DM_get_vert_data_layer(dm, CD_ORCO))) {
1121                 memcpy(layerorco, orco, sizeof(float) * totvert);
1122                 MEM_freeN(orco);
1123         }
1124         else
1125                 DM_add_vert_layer(dm, CD_ORCO, CD_ASSIGN, orco);
1126 }
1127
1128 static void curve_calc_orcodm(Scene *scene, Object *ob, DerivedMesh *derivedFinal, int forRender, int renderResolution)
1129 {
1130         /* this function represents logic of mesh's orcodm calculation
1131          * for displist-based objects
1132          */
1133         VirtualModifierData virtualModifierData;
1134         ModifierData *md = modifiers_getVirtualModifierList(ob, &virtualModifierData);
1135         ModifierData *pretessellatePoint;
1136         Curve *cu = ob->data;
1137         int required_mode;
1138         int editmode = (!forRender && (cu->editnurb || cu->editfont));
1139         DerivedMesh *ndm, *orcodm = NULL;
1140         ModifierApplyFlag app_flag = MOD_APPLY_ORCO;
1141
1142         if (renderResolution) {
1143                 app_flag |= MOD_APPLY_RENDER;
1144                 required_mode = eModifierMode_Render;
1145         }
1146         else
1147                 required_mode = eModifierMode_Realtime;
1148
1149         pretessellatePoint = curve_get_tessellate_point(scene, ob, renderResolution, editmode);
1150
1151         if (editmode)
1152                 required_mode |= eModifierMode_Editmode;
1153
1154         if (pretessellatePoint) {
1155                 md = pretessellatePoint->next;
1156         }
1157
1158         /* If modifiers are disabled, we wouldn't be here because
1159          * this function is only called if there're enabled constructive
1160          * modifiers applied on the curve.
1161          *
1162          * This means we can create ORCO DM in advance and assume it's
1163          * never NULL.
1164          */
1165         orcodm = create_orco_dm(scene, ob);
1166
1167         for (; md; md = md->next) {
1168                 ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1169
1170                 md->scene = scene;
1171
1172                 if (!modifier_isEnabled(scene, md, required_mode))
1173                         continue;
1174                 if (mti->type != eModifierTypeType_Constructive)
1175                         continue;
1176
1177                 ndm = modwrap_applyModifier(md, ob, orcodm, app_flag);
1178
1179                 if (ndm) {
1180                         /* if the modifier returned a new dm, release the old one */
1181                         if (orcodm && orcodm != ndm) {
1182                                 orcodm->release(orcodm);
1183                         }
1184                         orcodm = ndm;
1185                 }
1186         }
1187
1188         /* add an orco layer if needed */
1189         add_orco_dm(ob, derivedFinal, orcodm);
1190
1191         orcodm->release(orcodm);
1192 }
1193
1194 void BKE_displist_make_surf(Scene *scene, Object *ob, ListBase *dispbase,
1195                             DerivedMesh **derivedFinal, int forRender, int forOrco, int renderResolution)
1196 {
1197         ListBase nubase = {NULL, NULL};
1198         Nurb *nu;
1199         Curve *cu = ob->data;
1200         DispList *dl;
1201         float *data;
1202         int len;
1203
1204         if (!forRender && cu->editnurb) {
1205                 BKE_nurbList_duplicate(&nubase, BKE_curve_editNurbs_get(cu));
1206         }
1207         else {
1208                 BKE_nurbList_duplicate(&nubase, &cu->nurb);
1209         }
1210
1211         if (!forOrco)
1212                 curve_calc_modifiers_pre(scene, ob, &nubase, forRender, renderResolution);
1213
1214         for (nu = nubase.first; nu; nu = nu->next) {
1215                 if (forRender || nu->hide == 0) {
1216                         int resolu = nu->resolu, resolv = nu->resolv;
1217
1218                         if (renderResolution) {
1219                                 if (cu->resolu_ren)
1220                                         resolu = cu->resolu_ren;
1221                                 if (cu->resolv_ren)
1222                                         resolv = cu->resolv_ren;
1223                         }
1224
1225                         if (nu->pntsv == 1) {
1226                                 len = SEGMENTSU(nu) * resolu;
1227
1228                                 dl = MEM_callocN(sizeof(DispList), "makeDispListsurf");
1229                                 dl->verts = MEM_callocN(len * 3 * sizeof(float), "dlverts");
1230
1231                                 BLI_addtail(dispbase, dl);
1232                                 dl->parts = 1;
1233                                 dl->nr = len;
1234                                 dl->col = nu->mat_nr;
1235                                 dl->charidx = nu->charidx;
1236
1237                                 /* dl->rt will be used as flag for render face and */
1238                                 /* CU_2D conflicts with R_NOPUNOFLIP */
1239                                 dl->rt = nu->flag & ~CU_2D;
1240
1241                                 data = dl->verts;
1242                                 if (nu->flagu & CU_NURB_CYCLIC) dl->type = DL_POLY;
1243                                 else dl->type = DL_SEGM;
1244
1245                                 BKE_nurb_makeCurve(nu, data, NULL, NULL, NULL, resolu, 3 * sizeof(float));
1246                         }
1247                         else {
1248                                 len = (nu->pntsu * resolu) * (nu->pntsv * resolv);
1249
1250                                 dl = MEM_callocN(sizeof(DispList), "makeDispListsurf");
1251                                 dl->verts = MEM_callocN(len * 3 * sizeof(float), "dlverts");
1252                                 BLI_addtail(dispbase, dl);
1253
1254                                 dl->col = nu->mat_nr;
1255                                 dl->charidx = nu->charidx;
1256
1257                                 /* dl->rt will be used as flag for render face and */
1258                                 /* CU_2D conflicts with R_NOPUNOFLIP */
1259                                 dl->rt = nu->flag & ~CU_2D;
1260
1261                                 data = dl->verts;
1262                                 dl->type = DL_SURF;
1263
1264                                 dl->parts = (nu->pntsu * resolu);  /* in reverse, because makeNurbfaces works that way */
1265                                 dl->nr = (nu->pntsv * resolv);
1266                                 if (nu->flagv & CU_NURB_CYCLIC) dl->flag |= DL_CYCL_U;  /* reverse too! */
1267                                 if (nu->flagu & CU_NURB_CYCLIC) dl->flag |= DL_CYCL_V;
1268
1269                                 BKE_nurb_makeFaces(nu, data, 0, resolu, resolv);
1270
1271                                 /* gl array drawing: using indices */
1272                                 displist_surf_indices(dl);
1273                         }
1274                 }
1275         }
1276
1277         if (!forOrco) {
1278                 curve_calc_modifiers_post(scene, ob, &nubase, dispbase, derivedFinal,
1279                                           forRender, renderResolution);
1280         }
1281
1282         BKE_nurbList_free(&nubase);
1283 }
1284
1285 static void rotateBevelPiece(Curve *cu, BevPoint *bevp, BevPoint *nbevp, DispList *dlb, float bev_blend, float widfac, float fac, float **r_data)
1286 {
1287         float *fp, *data = *r_data;
1288         int b;
1289
1290         fp = dlb->verts;
1291         for (b = 0; b < dlb->nr; b++, fp += 3, data += 3) {
1292                 if (cu->flag & CU_3D) {
1293                         float vec[3], quat[4];
1294
1295                         vec[0] = fp[1] + widfac;
1296                         vec[1] = fp[2];
1297                         vec[2] = 0.0;
1298
1299                         if (nbevp == NULL) {
1300                                 copy_v3_v3(data, bevp->vec);
1301                                 copy_qt_qt(quat, bevp->quat);
1302                         }
1303                         else {
1304                                 interp_v3_v3v3(data, bevp->vec, nbevp->vec, bev_blend);
1305                                 interp_qt_qtqt(quat, bevp->quat, nbevp->quat, bev_blend);
1306                         }
1307
1308                         mul_qt_v3(quat, vec);
1309
1310                         data[0] += fac * vec[0];
1311                         data[1] += fac * vec[1];
1312                         data[2] += fac * vec[2];
1313                 }
1314                 else {
1315                         float sina, cosa;
1316
1317                         if (nbevp == NULL) {
1318                                 copy_v3_v3(data, bevp->vec);
1319                                 sina = bevp->sina;
1320                                 cosa = bevp->cosa;
1321                         }
1322                         else {
1323                                 interp_v3_v3v3(data, bevp->vec, nbevp->vec, bev_blend);
1324
1325                                 /* perhaps we need to interpolate angles instead. but the thing is
1326                                  * cosa and sina are not actually sine and cosine
1327                                  */
1328                                 sina = nbevp->sina * bev_blend + bevp->sina * (1.0f - bev_blend);
1329                                 cosa = nbevp->cosa * bev_blend + bevp->cosa * (1.0f - bev_blend);
1330                         }
1331
1332                         data[0] += fac * (widfac + fp[1]) * sina;
1333                         data[1] += fac * (widfac + fp[1]) * cosa;
1334                         data[2] += fac * fp[2];
1335                 }
1336         }
1337
1338         *r_data = data;
1339 }
1340
1341 static void fillBevelCap(Nurb *nu, DispList *dlb, float *prev_fp, ListBase *dispbase)
1342 {
1343         DispList *dl;
1344
1345         dl = MEM_callocN(sizeof(DispList), "makeDispListbev2");
1346         dl->verts = MEM_mallocN(3 * sizeof(float) * dlb->nr, "dlverts");
1347         memcpy(dl->verts, prev_fp, 3 * sizeof(float) * dlb->nr);
1348
1349         dl->type = DL_POLY;
1350
1351         dl->parts = 1;
1352         dl->nr = dlb->nr;
1353         dl->col = nu->mat_nr;
1354         dl->charidx = nu->charidx;
1355
1356         /* dl->rt will be used as flag for render face and */
1357         /* CU_2D conflicts with R_NOPUNOFLIP */
1358         dl->rt = nu->flag & ~CU_2D;
1359
1360         BLI_addtail(dispbase, dl);
1361 }
1362
1363 static void do_makeDispListCurveTypes(Scene *scene, Object *ob, ListBase *dispbase,
1364                                       DerivedMesh **derivedFinal, int forRender, int forOrco, int renderResolution)
1365 {
1366         Curve *cu = ob->data;
1367
1368         /* we do allow duplis... this is only displist on curve level */
1369         if (!ELEM3(ob->type, OB_SURF, OB_CURVE, OB_FONT)) return;
1370
1371         if (ob->type == OB_SURF) {
1372                 BKE_displist_make_surf(scene, ob, dispbase, derivedFinal, forRender, forOrco, renderResolution);
1373         }
1374         else if (ELEM(ob->type, OB_CURVE, OB_FONT)) {
1375                 ListBase dlbev;
1376                 ListBase nubase = {NULL, NULL};
1377
1378                 BLI_freelistN(&(ob->curve_cache->bev));
1379
1380                 /* We only re-evlauate path if evaluation is not happening for orco.
1381                  * If the calculation happens for orco, we should never free data which
1382                  * was needed before and only not needed for orco calculation.
1383                  */
1384                 if (!forOrco) {
1385                         if (ob->curve_cache->path) free_path(ob->curve_cache->path);
1386                         ob->curve_cache->path = NULL;
1387                 }
1388
1389                 if (ob->type == OB_FONT) {
1390                         BKE_vfont_to_curve_nubase(G.main, ob, FO_EDIT, &nubase);
1391                 }
1392                 else {
1393                         BKE_nurbList_duplicate(&nubase, BKE_curve_nurbs_get(cu));
1394                 }
1395
1396                 if (!forOrco)
1397                         curve_calc_modifiers_pre(scene, ob, &nubase, forRender, renderResolution);
1398
1399                 BKE_curve_bevelList_make(ob, &nubase, forRender != FALSE);
1400
1401                 /* If curve has no bevel will return nothing */
1402                 BKE_curve_bevel_make(scene, ob, &dlbev, forRender, renderResolution);
1403
1404                 /* no bevel or extrude, and no width correction? */
1405                 if (!dlbev.first && cu->width == 1.0f) {
1406                         curve_to_displist(cu, &nubase, dispbase, forRender, renderResolution);
1407                 }
1408                 else {
1409                         float widfac = cu->width - 1.0f;
1410                         BevList *bl = ob->curve_cache->bev.first;
1411                         Nurb *nu = nubase.first;
1412
1413                         for (; bl && nu; bl = bl->next, nu = nu->next) {
1414                                 DispList *dl;
1415                                 float *data;
1416                                 BevPoint *bevp;
1417                                 int a;
1418
1419                                 if (bl->nr) { /* blank bevel lists can happen */
1420
1421                                         /* exception handling; curve without bevel or extrude, with width correction */
1422                                         if (BLI_listbase_is_empty(&dlbev)) {
1423                                                 dl = MEM_callocN(sizeof(DispList), "makeDispListbev");
1424                                                 dl->verts = MEM_callocN(3 * sizeof(float) * bl->nr, "dlverts");
1425                                                 BLI_addtail(dispbase, dl);
1426
1427                                                 if (bl->poly != -1) dl->type = DL_POLY;
1428                                                 else dl->type = DL_SEGM;
1429
1430                                                 if (dl->type == DL_SEGM) dl->flag = (DL_FRONT_CURVE | DL_BACK_CURVE);
1431
1432                                                 dl->parts = 1;
1433                                                 dl->nr = bl->nr;
1434                                                 dl->col = nu->mat_nr;
1435                                                 dl->charidx = nu->charidx;
1436
1437                                                 /* dl->rt will be used as flag for render face and */
1438                                                 /* CU_2D conflicts with R_NOPUNOFLIP */
1439                                                 dl->rt = nu->flag & ~CU_2D;
1440
1441                                                 a = dl->nr;
1442                                                 bevp = (BevPoint *)(bl + 1);
1443                                                 data = dl->verts;
1444                                                 while (a--) {
1445                                                         data[0] = bevp->vec[0] + widfac * bevp->sina;
1446                                                         data[1] = bevp->vec[1] + widfac * bevp->cosa;
1447                                                         data[2] = bevp->vec[2];
1448                                                         bevp++;
1449                                                         data += 3;
1450                                                 }
1451                                         }
1452                                         else {
1453                                                 DispList *dlb;
1454                                                 ListBase bottom_capbase = {NULL, NULL};
1455                                                 ListBase top_capbase = {NULL, NULL};
1456                                                 float bottom_no[3] = {0.0f};
1457                                                 float top_no[3] = {0.0f};
1458
1459                                                 for (dlb = dlbev.first; dlb; dlb = dlb->next) {
1460                                                         const float bevfac1 = min_ff(cu->bevfac1, cu->bevfac2);
1461                                                         const float bevfac2 = max_ff(cu->bevfac1, cu->bevfac2);
1462                                                         float firstblend = 0.0f, lastblend = 0.0f;
1463                                                         int i, start, steps;
1464
1465                                                         if (bevfac2 - bevfac1 == 0.0f)
1466                                                                 continue;
1467
1468                                                         start = (int)(bevfac1 * (bl->nr - 1));
1469                                                         steps = 2 + (int)((bevfac2) * (bl->nr - 1)) - start;
1470                                                         firstblend = 1.0f - (bevfac1 * (bl->nr - 1) - (int)(bevfac1 * (bl->nr - 1)));
1471                                                         lastblend  =         bevfac2 * (bl->nr - 1) - (int)(bevfac2 * (bl->nr - 1));
1472
1473                                                         if (start + steps > bl->nr) {
1474                                                                 steps = bl->nr - start;
1475                                                                 lastblend = 1.0f;
1476                                                         }
1477
1478                                                         /* for each part of the bevel use a separate displblock */
1479                                                         dl = MEM_callocN(sizeof(DispList), "makeDispListbev1");
1480                                                         dl->verts = data = MEM_callocN(3 * sizeof(float) * dlb->nr * steps, "dlverts");
1481                                                         BLI_addtail(dispbase, dl);
1482
1483                                                         dl->type = DL_SURF;
1484
1485                                                         dl->flag = dlb->flag & (DL_FRONT_CURVE | DL_BACK_CURVE);
1486                                                         if (dlb->type == DL_POLY) dl->flag |= DL_CYCL_U;
1487                                                         if (bl->poly >= 0) dl->flag |= DL_CYCL_V;
1488
1489                                                         dl->parts = steps;
1490                                                         dl->nr = dlb->nr;
1491                                                         dl->col = nu->mat_nr;
1492                                                         dl->charidx = nu->charidx;
1493
1494                                                         /* dl->rt will be used as flag for render face and */
1495                                                         /* CU_2D conflicts with R_NOPUNOFLIP */
1496                                                         dl->rt = nu->flag & ~CU_2D;
1497
1498                                                         dl->bevelSplitFlag = MEM_callocN(sizeof(*dl->col2) * ((steps + 0x1F) >> 5),
1499                                                                                          "bevelSplitFlag");
1500
1501                                                         /* for each point of poly make a bevel piece */
1502                                                         bevp = (BevPoint *)(bl + 1) + start;
1503                                                         for (i = start, a = 0; a < steps; i++, bevp++, a++) {
1504                                                                 float fac = 1.0;
1505                                                                 float *cur_data = data;
1506
1507                                                                 if (cu->taperobj == NULL) {
1508                                                                         fac = bevp->radius;
1509                                                                 }
1510                                                                 else {
1511                                                                         float len, taper_fac;
1512
1513                                                                         if (cu->flag & CU_MAP_TAPER) {
1514                                                                                 len = (steps - 3) + firstblend + lastblend;
1515
1516                                                                                 if (a == 0)
1517                                                                                         taper_fac = 0.0f;
1518                                                                                 else if (a == steps - 1)
1519                                                                                         taper_fac = 1.0f;
1520                                                                                 else
1521                                                                                         taper_fac = ((float) a - (1.0f - firstblend)) / len;
1522                                                                         }
1523                                                                         else {
1524                                                                                 len = bl->nr - 1;
1525                                                                                 taper_fac = (float) i / len;
1526
1527                                                                                 if (a == 0)
1528                                                                                         taper_fac += (1.0f - firstblend) / len;
1529                                                                                 else if (a == steps - 1)
1530                                                                                         taper_fac -= (1.0f - lastblend) / len;
1531                                                                         }
1532
1533                                                                         fac = displist_calc_taper(scene, cu->taperobj, taper_fac);
1534                                                                 }
1535
1536                                                                 if (bevp->split_tag) {
1537                                                                         dl->bevelSplitFlag[a >> 5] |= 1 << (a & 0x1F);
1538                                                                 }
1539
1540                                                                 /* rotate bevel piece and write in data */
1541                                                                 if (a == 0)
1542                                                                         rotateBevelPiece(cu, bevp, bevp + 1, dlb, 1.0f - firstblend, widfac, fac, &data);
1543                                                                 else if (a == steps - 1)
1544                                                                         rotateBevelPiece(cu, bevp, bevp - 1, dlb, 1.0f - lastblend, widfac, fac, &data);
1545                                                                 else
1546                                                                         rotateBevelPiece(cu, bevp, NULL, dlb, 0.0f, widfac, fac, &data);
1547
1548                                                                 if (cu->bevobj && (cu->flag & CU_FILL_CAPS) && !(nu->flagu & CU_NURB_CYCLIC)) {
1549                                                                         if (a == 1) {
1550                                                                                 fillBevelCap(nu, dlb, cur_data - 3 * dlb->nr, &bottom_capbase);
1551                                                                                 negate_v3_v3(bottom_no, bevp->dir);
1552                                                                         }
1553                                                                         if (a == steps - 1) {
1554                                                                                 fillBevelCap(nu, dlb, cur_data, &top_capbase);
1555                                                                                 copy_v3_v3(top_no, bevp->dir);
1556                                                                         }
1557                                                                 }
1558                                                         }
1559
1560                                                         /* gl array drawing: using indices */
1561                                                         displist_surf_indices(dl);
1562                                                 }
1563
1564                                                 if (bottom_capbase.first) {
1565                                                         BKE_displist_fill(&bottom_capbase, dispbase, bottom_no, false);
1566                                                         BKE_displist_fill(&top_capbase, dispbase, top_no, false);
1567                                                         BKE_displist_free(&bottom_capbase);
1568                                                         BKE_displist_free(&top_capbase);
1569                                                 }
1570                                         }
1571                                 }
1572
1573                         }
1574                         BKE_displist_free(&dlbev);
1575                 }
1576
1577                 if (!(cu->flag & CU_DEFORM_FILL)) {
1578                         curve_to_filledpoly(cu, &nubase, dispbase);
1579                 }
1580
1581                 if (!forOrco) {
1582                         if ((cu->flag & CU_PATH) ||
1583                             DAG_get_eval_flags_for_object(scene, ob) & DAG_EVAL_NEED_CURVE_PATH)
1584                         {
1585                                 calc_curvepath(ob, &nubase);
1586                         }
1587                 }
1588
1589                 if (!forOrco)
1590                         curve_calc_modifiers_post(scene, ob, &nubase, dispbase, derivedFinal, forRender, renderResolution);
1591
1592                 if (cu->flag & CU_DEFORM_FILL && !ob->derivedFinal) {
1593                         curve_to_filledpoly(cu, &nubase, dispbase);
1594                 }
1595
1596                 BKE_nurbList_free(&nubase);
1597         }
1598 }
1599
1600 void BKE_displist_make_curveTypes(Scene *scene, Object *ob, int forOrco)
1601 {
1602         ListBase *dispbase;
1603
1604         /* The same check for duplis as in do_makeDispListCurveTypes.
1605          * Happens when curve used for constraint/bevel was converted to mesh.
1606          * check there is still needed for render displist and orco displists. */
1607         if (!ELEM3(ob->type, OB_SURF, OB_CURVE, OB_FONT))
1608                 return;
1609
1610         BKE_object_free_derived_caches(ob);
1611
1612         if (!ob->curve_cache) {
1613                 ob->curve_cache = MEM_callocN(sizeof(CurveCache), "CurveCache for curve types");
1614         }
1615
1616         dispbase = &(ob->curve_cache->disp);
1617
1618         do_makeDispListCurveTypes(scene, ob, dispbase, &ob->derivedFinal, 0, forOrco, 0);
1619
1620         boundbox_displist_object(ob);
1621 }
1622
1623 void BKE_displist_make_curveTypes_forRender(Scene *scene, Object *ob, ListBase *dispbase,
1624                                       DerivedMesh **derivedFinal, int forOrco, int renderResolution)
1625 {
1626         if (ob->curve_cache == NULL) {
1627                 ob->curve_cache = MEM_callocN(sizeof(CurveCache), "CurveCache for MBall");
1628         }
1629
1630         do_makeDispListCurveTypes(scene, ob, dispbase, derivedFinal, 1, forOrco, renderResolution);
1631 }
1632
1633 void BKE_displist_make_curveTypes_forOrco(struct Scene *scene, struct Object *ob, struct ListBase *dispbase)
1634 {
1635         if (ob->curve_cache == NULL) {
1636                 ob->curve_cache = MEM_callocN(sizeof(CurveCache), "CurveCache for MBall");
1637         }
1638
1639         do_makeDispListCurveTypes(scene, ob, dispbase, NULL, 1, 1, 1);
1640 }
1641
1642 /* add Orco layer to the displist object which has got derived mesh and return orco */
1643 float *BKE_displist_make_orco(Scene *scene, Object *ob, DerivedMesh *derivedFinal, int forRender, int renderResolution)
1644 {
1645         float *orco;
1646
1647         if (derivedFinal == NULL)
1648                 derivedFinal = ob->derivedFinal;
1649
1650         if (!derivedFinal->getVertDataArray(derivedFinal, CD_ORCO)) {
1651                 curve_calc_orcodm(scene, ob, derivedFinal, forRender, renderResolution);
1652         }
1653
1654         orco = derivedFinal->getVertDataArray(derivedFinal, CD_ORCO);
1655
1656         if (orco) {
1657                 orco = MEM_dupallocN(orco);
1658         }
1659
1660         return orco;
1661 }
1662
1663 void BKE_displist_minmax(ListBase *dispbase, float min[3], float max[3])
1664 {
1665         DispList *dl;
1666         float *vert;
1667         int a, tot = 0;
1668         int doit = 0;
1669
1670         for (dl = dispbase->first; dl; dl = dl->next) {
1671                 tot = (dl->type == DL_INDEX3) ? dl->nr : dl->nr * dl->parts;
1672                 vert = dl->verts;
1673                 for (a = 0; a < tot; a++, vert += 3) {
1674                         minmax_v3v3_v3(min, max, vert);
1675                 }
1676                 doit |= (tot != 0);
1677         }
1678
1679         if (!doit) {
1680                 /* there's no geometry in displist, use zero-sized boundbox */
1681                 zero_v3(min);
1682                 zero_v3(max);
1683         }
1684 }
1685
1686 /* this is confusing, there's also min_max_object, appplying the obmat... */
1687 static void boundbox_displist_object(Object *ob)
1688 {
1689         if (ELEM3(ob->type, OB_CURVE, OB_SURF, OB_FONT)) {
1690                 /* Curver's BB is already calculated as a part of modifier stack,
1691                  * here we only calculate object BB based on final display list.
1692                  */
1693
1694                 /* object's BB is calculated from final displist */
1695                 if (ob->bb == NULL)
1696                         ob->bb = MEM_callocN(sizeof(BoundBox), "boundbox");
1697
1698                 if (ob->derivedFinal) {
1699                         DM_set_object_boundbox(ob, ob->derivedFinal);
1700                 }
1701                 else {
1702                         float min[3], max[3];
1703
1704                         INIT_MINMAX(min, max);
1705                         BKE_displist_minmax(&ob->curve_cache->disp, min, max);
1706                         BKE_boundbox_init_from_minmax(ob->bb, min, max);
1707                 }
1708         }
1709 }