Merging r40493 through r40509 from trunk into soc-2011-tomato
[blender.git] / source / blender / blenkernel / intern / cdderivedmesh.c
1 /*
2 * $Id$
3 *
4 * ***** BEGIN GPL LICENSE BLOCK *****
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software  Foundation,
18 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19 *
20 * The Original Code is Copyright (C) 2006 Blender Foundation.
21 * All rights reserved.
22 *
23 * The Original Code is: all of this file.
24 *
25 * Contributor(s): Ben Batt <benbatt@gmail.com>
26 *
27 * ***** END GPL LICENSE BLOCK *****
28 *
29 * Implementation of CDDerivedMesh.
30 *
31 * BKE_cdderivedmesh.h contains the function prototypes for this file.
32 *
33 */
34
35 /** \file blender/blenkernel/intern/cdderivedmesh.c
36  *  \ingroup bke
37  */
38  
39 #include "GL/glew.h"
40
41 #include "BLI_blenlib.h"
42 #include "BLI_edgehash.h"
43 #include "BLI_editVert.h"
44 #include "BLI_math.h"
45 #include "BLI_pbvh.h"
46 #include "BLI_utildefines.h"
47
48 #include "BKE_cdderivedmesh.h"
49 #include "BKE_global.h"
50 #include "BKE_mesh.h"
51 #include "BKE_paint.h"
52
53
54 #include "DNA_meshdata_types.h"
55 #include "DNA_object_types.h"
56 #include "DNA_curve_types.h" /* for Curve */
57
58 #include "MEM_guardedalloc.h"
59
60 #include "GPU_buffers.h"
61 #include "GPU_draw.h"
62 #include "GPU_extensions.h"
63 #include "GPU_material.h"
64
65 #include <string.h>
66 #include <limits.h>
67 #include <math.h>
68
69 typedef struct {
70         DerivedMesh dm;
71
72         /* these point to data in the DerivedMesh custom data layers,
73            they are only here for efficiency and convenience **/
74         MVert *mvert;
75         MEdge *medge;
76         MFace *mface;
77
78         /* Cached */
79         struct PBVH *pbvh;
80         int pbvh_draw;
81
82         /* Mesh connectivity */
83         struct ListBase *fmap;
84         struct IndexNode *fmap_mem;
85 } CDDerivedMesh;
86
87 /**************** DerivedMesh interface functions ****************/
88 static int cdDM_getNumVerts(DerivedMesh *dm)
89 {
90         return dm->numVertData;
91 }
92
93 static int cdDM_getNumEdges(DerivedMesh *dm)
94 {
95         return dm->numEdgeData;
96 }
97
98 static int cdDM_getNumFaces(DerivedMesh *dm)
99 {
100         return dm->numFaceData;
101 }
102
103 static void cdDM_getVert(DerivedMesh *dm, int index, MVert *vert_r)
104 {
105         CDDerivedMesh *cddm = (CDDerivedMesh *)dm;
106         *vert_r = cddm->mvert[index];
107 }
108
109 static void cdDM_getEdge(DerivedMesh *dm, int index, MEdge *edge_r)
110 {
111         CDDerivedMesh *cddm = (CDDerivedMesh *)dm;
112         *edge_r = cddm->medge[index];
113 }
114
115 static void cdDM_getFace(DerivedMesh *dm, int index, MFace *face_r)
116 {
117         CDDerivedMesh *cddm = (CDDerivedMesh *)dm;
118         *face_r = cddm->mface[index];
119 }
120
121 static void cdDM_copyVertArray(DerivedMesh *dm, MVert *vert_r)
122 {
123         CDDerivedMesh *cddm = (CDDerivedMesh *)dm;
124         memcpy(vert_r, cddm->mvert, sizeof(*vert_r) * dm->numVertData);
125 }
126
127 static void cdDM_copyEdgeArray(DerivedMesh *dm, MEdge *edge_r)
128 {
129         CDDerivedMesh *cddm = (CDDerivedMesh *)dm;
130         memcpy(edge_r, cddm->medge, sizeof(*edge_r) * dm->numEdgeData);
131 }
132
133 static void cdDM_copyFaceArray(DerivedMesh *dm, MFace *face_r)
134 {
135         CDDerivedMesh *cddm = (CDDerivedMesh *)dm;
136         memcpy(face_r, cddm->mface, sizeof(*face_r) * dm->numFaceData);
137 }
138
139 static void cdDM_getMinMax(DerivedMesh *dm, float min_r[3], float max_r[3])
140 {
141         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
142         int i;
143
144         if (dm->numVertData) {
145                 for (i=0; i<dm->numVertData; i++) {
146                         DO_MINMAX(cddm->mvert[i].co, min_r, max_r);
147                 }
148         } else {
149                 min_r[0] = min_r[1] = min_r[2] = max_r[0] = max_r[1] = max_r[2] = 0.0;
150         }
151 }
152
153 static void cdDM_getVertCo(DerivedMesh *dm, int index, float co_r[3])
154 {
155         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
156
157         VECCOPY(co_r, cddm->mvert[index].co);
158 }
159
160 static void cdDM_getVertCos(DerivedMesh *dm, float (*cos_r)[3])
161 {
162         MVert *mv = CDDM_get_verts(dm);
163         int i;
164
165         for(i = 0; i < dm->numVertData; i++, mv++)
166                 VECCOPY(cos_r[i], mv->co);
167 }
168
169 static void cdDM_getVertNo(DerivedMesh *dm, int index, float no_r[3])
170 {
171         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
172         normal_short_to_float_v3(no_r, cddm->mvert[index].no);
173 }
174
175 static ListBase *cdDM_getFaceMap(Object *ob, DerivedMesh *dm)
176 {
177         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
178
179         if(!cddm->fmap && ob->type == OB_MESH) {
180                 Mesh *me= ob->data;
181
182                 create_vert_face_map(&cddm->fmap, &cddm->fmap_mem, me->mface,
183                                          me->totvert, me->totface);
184         }
185
186         return cddm->fmap;
187 }
188
189 static int can_pbvh_draw(Object *ob, DerivedMesh *dm)
190 {
191         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
192         Mesh *me= ob->data;
193         int deformed= 0;
194
195         /* active modifiers means extra deformation, which can't be handled correct
196            on bith of PBVH and sculpt "layer" levels, so use PBVH only for internal brush
197            stuff and show final DerivedMesh so user would see actual object shape */
198         deformed|= ob->sculpt->modifiers_active;
199
200         /* as in case with modifiers, we can't synchronize deformation made against
201            PBVH and non-locked keyblock, so also use PBVH only for brushes and
202            final DM to give final result to user */
203         deformed|= ob->sculpt->kb && (ob->shapeflag&OB_SHAPE_LOCK) == 0;
204
205         if(deformed)
206                 return 0;
207
208         return (cddm->mvert == me->mvert) || ob->sculpt->kb;
209 }
210
211 static struct PBVH *cdDM_getPBVH(Object *ob, DerivedMesh *dm)
212 {
213         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
214
215         if(!ob) {
216                 cddm->pbvh= NULL;
217                 return NULL;
218         }
219
220         if(!ob->sculpt)
221                 return NULL;
222         if(ob->sculpt->pbvh) {
223                 cddm->pbvh= ob->sculpt->pbvh;
224                 cddm->pbvh_draw = can_pbvh_draw(ob, dm);
225         }
226
227         /* always build pbvh from original mesh, and only use it for drawing if
228            this derivedmesh is just original mesh. it's the multires subsurf dm
229            that this is actually for, to support a pbvh on a modified mesh */
230         if(!cddm->pbvh && ob->type == OB_MESH) {
231                 SculptSession *ss= ob->sculpt;
232                 Mesh *me= ob->data;
233                 cddm->pbvh = BLI_pbvh_new();
234                 cddm->pbvh_draw = can_pbvh_draw(ob, dm);
235                 BLI_pbvh_build_mesh(cddm->pbvh, me->mface, me->mvert,
236                                    me->totface, me->totvert);
237
238                 if(ss->modifiers_active && ob->derivedDeform) {
239                         DerivedMesh *deformdm= ob->derivedDeform;
240                         float (*vertCos)[3];
241                         int totvert;
242
243                         totvert= deformdm->getNumVerts(deformdm);
244                         vertCos= MEM_callocN(3*totvert*sizeof(float), "cdDM_getPBVH vertCos");
245                         deformdm->getVertCos(deformdm, vertCos);
246                         BLI_pbvh_apply_vertCos(cddm->pbvh, vertCos);
247                         MEM_freeN(vertCos);
248                 }
249         }
250
251         return cddm->pbvh;
252 }
253
254 /* update vertex normals so that drawing smooth faces works during sculpt
255    TODO: proper fix is to support the pbvh in all drawing modes */
256 static void cdDM_update_normals_from_pbvh(DerivedMesh *dm)
257 {
258         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
259         float (*face_nors)[3];
260
261         if(!cddm->pbvh || !cddm->pbvh_draw || !dm->numFaceData)
262                 return;
263
264         face_nors = CustomData_get_layer(&dm->faceData, CD_NORMAL);
265
266         BLI_pbvh_update(cddm->pbvh, PBVH_UpdateNormals, face_nors);
267 }
268
269 static void cdDM_drawVerts(DerivedMesh *dm)
270 {
271         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
272         MVert *mv = cddm->mvert;
273         int i;
274
275         if( GPU_buffer_legacy(dm) ) {
276                 glBegin(GL_POINTS);
277                 for(i = 0; i < dm->numVertData; i++, mv++)
278                         glVertex3fv(mv->co);
279                 glEnd();
280         }
281         else {  /* use OpenGL VBOs or Vertex Arrays instead for better, faster rendering */
282                 GPU_vertex_setup(dm);
283                 if( !GPU_buffer_legacy(dm) ) {
284                         if(dm->drawObject->tot_triangle_point)
285                                 glDrawArrays(GL_POINTS,0, dm->drawObject->tot_triangle_point);
286                         else
287                                 glDrawArrays(GL_POINTS,0, dm->drawObject->tot_loose_point);
288                 }
289                 GPU_buffer_unbind();
290         }
291 }
292
293 static void cdDM_drawUVEdges(DerivedMesh *dm)
294 {
295         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
296         MFace *mf = cddm->mface;
297         MTFace *tf = DM_get_face_data_layer(dm, CD_MTFACE);
298         int i;
299
300         if(mf) {
301                 if( GPU_buffer_legacy(dm) ) {
302                         glBegin(GL_LINES);
303                         for(i = 0; i < dm->numFaceData; i++, mf++, tf++) {
304                                 if(!(mf->flag&ME_HIDE)) {
305                                         glVertex2fv(tf->uv[0]);
306                                         glVertex2fv(tf->uv[1]);
307
308                                         glVertex2fv(tf->uv[1]);
309                                         glVertex2fv(tf->uv[2]);
310
311                                         if(!mf->v4) {
312                                                 glVertex2fv(tf->uv[2]);
313                                                 glVertex2fv(tf->uv[0]);
314                                         } else {
315                                                 glVertex2fv(tf->uv[2]);
316                                                 glVertex2fv(tf->uv[3]);
317
318                                                 glVertex2fv(tf->uv[3]);
319                                                 glVertex2fv(tf->uv[0]);
320                                         }
321                                 }
322                         }
323                         glEnd();
324                 }
325                 else {
326                         int prevstart = 0;
327                         int prevdraw = 1;
328                         int draw = 1;
329                         int curpos = 0;
330
331                         GPU_uvedge_setup(dm);
332                         if( !GPU_buffer_legacy(dm) ) {
333                                 for(i = 0; i < dm->numFaceData; i++, mf++) {
334                                         if(!(mf->flag&ME_HIDE)) {
335                                                 draw = 1;
336                                         } 
337                                         else {
338                                                 draw = 0;
339                                         }
340                                         if( prevdraw != draw ) {
341                                                 if( prevdraw > 0 && (curpos-prevstart) > 0) {
342                                                         glDrawArrays(GL_LINES,prevstart,curpos-prevstart);
343                                                 }
344                                                 prevstart = curpos;
345                                         }
346                                         if( mf->v4 ) {
347                                                 curpos += 8;
348                                         }
349                                         else {
350                                                 curpos += 6;
351                                         }
352                                         prevdraw = draw;
353                                 }
354                                 if( prevdraw > 0 && (curpos-prevstart) > 0 ) {
355                                         glDrawArrays(GL_LINES,prevstart,curpos-prevstart);
356                                 }
357                         }
358                         GPU_buffer_unbind();
359                 }
360         }
361 }
362
363 static void cdDM_drawEdges(DerivedMesh *dm, int drawLooseEdges, int drawAllEdges)
364 {
365         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
366         MVert *mvert = cddm->mvert;
367         MEdge *medge = cddm->medge;
368         int i;
369         
370         if( GPU_buffer_legacy(dm) ) {
371                 DEBUG_VBO( "Using legacy code. cdDM_drawEdges\n" );
372                 glBegin(GL_LINES);
373                 for(i = 0; i < dm->numEdgeData; i++, medge++) {
374                         if((drawAllEdges || (medge->flag&ME_EDGEDRAW))
375                            && (drawLooseEdges || !(medge->flag&ME_LOOSEEDGE))) {
376                                 glVertex3fv(mvert[medge->v1].co);
377                                 glVertex3fv(mvert[medge->v2].co);
378                         }
379                 }
380                 glEnd();
381         }
382         else {  /* use OpenGL VBOs or Vertex Arrays instead for better, faster rendering */
383                 int prevstart = 0;
384                 int prevdraw = 1;
385                 int draw = 1;
386
387                 GPU_edge_setup(dm);
388                 if( !GPU_buffer_legacy(dm) ) {
389                         for(i = 0; i < dm->numEdgeData; i++, medge++) {
390                                 if((drawAllEdges || (medge->flag&ME_EDGEDRAW))
391                                    && (drawLooseEdges || !(medge->flag&ME_LOOSEEDGE))) {
392                                         draw = 1;
393                                 } 
394                                 else {
395                                         draw = 0;
396                                 }
397                                 if( prevdraw != draw ) {
398                                         if( prevdraw > 0 && (i-prevstart) > 0 ) {
399                                                 GPU_buffer_draw_elements( dm->drawObject->edges, GL_LINES, prevstart*2, (i-prevstart)*2  );
400                                         }
401                                         prevstart = i;
402                                 }
403                                 prevdraw = draw;
404                         }
405                         if( prevdraw > 0 && (i-prevstart) > 0 ) {
406                                 GPU_buffer_draw_elements( dm->drawObject->edges, GL_LINES, prevstart*2, (i-prevstart)*2  );
407                         }
408                 }
409                 GPU_buffer_unbind();
410         }
411 }
412
413 static void cdDM_drawLooseEdges(DerivedMesh *dm)
414 {
415         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
416         MVert *mvert = cddm->mvert;
417         MEdge *medge = cddm->medge;
418         int i;
419
420         if( GPU_buffer_legacy(dm) ) {
421                 DEBUG_VBO( "Using legacy code. cdDM_drawLooseEdges\n" );
422                 glBegin(GL_LINES);
423                 for(i = 0; i < dm->numEdgeData; i++, medge++) {
424                         if(medge->flag&ME_LOOSEEDGE) {
425                                 glVertex3fv(mvert[medge->v1].co);
426                                 glVertex3fv(mvert[medge->v2].co);
427                         }
428                 }
429                 glEnd();
430         }
431         else {  /* use OpenGL VBOs or Vertex Arrays instead for better, faster rendering */
432                 int prevstart = 0;
433                 int prevdraw = 1;
434                 int draw = 1;
435
436                 GPU_edge_setup(dm);
437                 if( !GPU_buffer_legacy(dm) ) {
438                         for(i = 0; i < dm->numEdgeData; i++, medge++) {
439                                 if(medge->flag&ME_LOOSEEDGE) {
440                                         draw = 1;
441                                 } 
442                                 else {
443                                         draw = 0;
444                                 }
445                                 if( prevdraw != draw ) {
446                                         if( prevdraw > 0 && (i-prevstart) > 0) {
447                                                 GPU_buffer_draw_elements( dm->drawObject->edges, GL_LINES, prevstart*2, (i-prevstart)*2  );
448                                         }
449                                         prevstart = i;
450                                 }
451                                 prevdraw = draw;
452                         }
453                         if( prevdraw > 0 && (i-prevstart) > 0 ) {
454                                 GPU_buffer_draw_elements( dm->drawObject->edges, GL_LINES, prevstart*2, (i-prevstart)*2  );
455                         }
456                 }
457                 GPU_buffer_unbind();
458         }
459 }
460
461 static void cdDM_drawFacesSolid(DerivedMesh *dm,
462                                 float (*partial_redraw_planes)[4],
463                                 int UNUSED(fast), int (*setMaterial)(int, void *attribs))
464 {
465         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
466         MVert *mvert = cddm->mvert;
467         MFace *mface = cddm->mface;
468         float *nors= dm->getFaceDataArray(dm, CD_NORMAL);
469         int a, glmode = -1, shademodel = -1, matnr = -1, drawCurrentMat = 1;
470
471 #define PASSVERT(index) {                                               \
472         if(shademodel == GL_SMOOTH) {                           \
473                 short *no = mvert[index].no;                    \
474                 glNormal3sv(no);                                                \
475         }                                                                                       \
476         glVertex3fv(mvert[index].co);   \
477 }
478
479         if(cddm->pbvh && cddm->pbvh_draw) {
480                 if(dm->numFaceData) {
481                         float (*face_nors)[3] = CustomData_get_layer(&dm->faceData, CD_NORMAL);
482
483                         /* should be per face */
484                         if(!setMaterial(mface->mat_nr+1, NULL))
485                                 return;
486
487                         glShadeModel((mface->flag & ME_SMOOTH)? GL_SMOOTH: GL_FLAT);
488                         BLI_pbvh_draw(cddm->pbvh, partial_redraw_planes, face_nors, (mface->flag & ME_SMOOTH));
489                         glShadeModel(GL_FLAT);
490                 }
491
492                 return;
493         }
494
495         if( GPU_buffer_legacy(dm) ) {
496                 DEBUG_VBO( "Using legacy code. cdDM_drawFacesSolid\n" );
497                 glBegin(glmode = GL_QUADS);
498                 for(a = 0; a < dm->numFaceData; a++, mface++) {
499                         int new_glmode, new_matnr, new_shademodel;
500
501                         new_glmode = mface->v4?GL_QUADS:GL_TRIANGLES;
502                         new_matnr = mface->mat_nr + 1;
503                         new_shademodel = (mface->flag & ME_SMOOTH)?GL_SMOOTH:GL_FLAT;
504                         
505                         if(new_glmode != glmode || new_matnr != matnr
506                            || new_shademodel != shademodel) {
507                                 glEnd();
508
509                                 drawCurrentMat = setMaterial(matnr = new_matnr, NULL);
510
511                                 glShadeModel(shademodel = new_shademodel);
512                                 glBegin(glmode = new_glmode);
513                         } 
514                         
515                         if(drawCurrentMat) {
516                                 if(shademodel == GL_FLAT) {
517                                         if (nors) {
518                                                 glNormal3fv(nors);
519                                         }
520                                         else {
521                                                 /* TODO make this better (cache facenormals as layer?) */
522                                                 float nor[3];
523                                                 if(mface->v4) {
524                                                         normal_quad_v3( nor,mvert[mface->v1].co, mvert[mface->v2].co, mvert[mface->v3].co, mvert[mface->v4].co);
525                                                 } else {
526                                                         normal_tri_v3( nor,mvert[mface->v1].co, mvert[mface->v2].co, mvert[mface->v3].co);
527                                                 }
528                                                 glNormal3fv(nor);
529                                         }
530                                 }
531
532                                 PASSVERT(mface->v1);
533                                 PASSVERT(mface->v2);
534                                 PASSVERT(mface->v3);
535                                 if(mface->v4) {
536                                         PASSVERT(mface->v4);
537                                 }
538                         }
539
540                         if(nors) nors += 3;
541                 }
542                 glEnd();
543         }
544         else {  /* use OpenGL VBOs or Vertex Arrays instead for better, faster rendering */
545                 GPU_vertex_setup( dm );
546                 GPU_normal_setup( dm );
547                 if( !GPU_buffer_legacy(dm) ) {
548                         glShadeModel(GL_SMOOTH);
549                         for( a = 0; a < dm->drawObject->totmaterial; a++ ) {
550                                 if( setMaterial(dm->drawObject->materials[a].mat_nr+1, NULL) )
551                                         glDrawArrays(GL_TRIANGLES, dm->drawObject->materials[a].start,
552                                                      dm->drawObject->materials[a].totpoint);
553                         }
554                 }
555                 GPU_buffer_unbind( );
556         }
557
558 #undef PASSVERT
559         glShadeModel(GL_FLAT);
560 }
561
562 static void cdDM_drawFacesColored(DerivedMesh *dm, int useTwoSided, unsigned char *col1, unsigned char *col2)
563 {
564         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
565         int a, glmode;
566         unsigned char *cp1, *cp2;
567         MVert *mvert = cddm->mvert;
568         MFace *mface = cddm->mface;
569
570         cp1 = col1;
571         if(col2) {
572                 cp2 = col2;
573         } else {
574                 cp2 = NULL;
575                 useTwoSided = 0;
576         }
577
578         /* there's a conflict here... twosided colors versus culling...? */
579         /* defined by history, only texture faces have culling option */
580         /* we need that as mesh option builtin, next to double sided lighting */
581         if(col2) {
582                 glEnable(GL_CULL_FACE);
583         }
584
585         cdDM_update_normals_from_pbvh(dm);
586
587         if( GPU_buffer_legacy(dm) ) {
588                 DEBUG_VBO( "Using legacy code. cdDM_drawFacesColored\n" );
589                 glShadeModel(GL_SMOOTH);
590                 glBegin(glmode = GL_QUADS);
591                 for(a = 0; a < dm->numFaceData; a++, mface++, cp1 += 16) {
592                         int new_glmode = mface->v4?GL_QUADS:GL_TRIANGLES;
593
594                         if(new_glmode != glmode) {
595                                 glEnd();
596                                 glBegin(glmode = new_glmode);
597                         }
598                                 
599                         glColor3ubv(cp1+0);
600                         glVertex3fv(mvert[mface->v1].co);
601                         glColor3ubv(cp1+4);
602                         glVertex3fv(mvert[mface->v2].co);
603                         glColor3ubv(cp1+8);
604                         glVertex3fv(mvert[mface->v3].co);
605                         if(mface->v4) {
606                                 glColor3ubv(cp1+12);
607                                 glVertex3fv(mvert[mface->v4].co);
608                         }
609                                 
610                         if(useTwoSided) {
611                                 glColor3ubv(cp2+8);
612                                 glVertex3fv(mvert[mface->v3].co );
613                                 glColor3ubv(cp2+4);
614                                 glVertex3fv(mvert[mface->v2].co );
615                                 glColor3ubv(cp2+0);
616                                 glVertex3fv(mvert[mface->v1].co );
617                                 if(mface->v4) {
618                                         glColor3ubv(cp2+12);
619                                         glVertex3fv(mvert[mface->v4].co );
620                                 }
621                         }
622                         if(col2) cp2 += 16;
623                 }
624                 glEnd();
625         }
626         else { /* use OpenGL VBOs or Vertex Arrays instead for better, faster rendering */
627                 GPU_color4_upload(dm,cp1);
628                 GPU_vertex_setup(dm);
629                 GPU_color_setup(dm);
630                 if( !GPU_buffer_legacy(dm) ) {
631                         glShadeModel(GL_SMOOTH);
632                         glDrawArrays(GL_TRIANGLES, 0, dm->drawObject->tot_triangle_point);
633
634                         if( useTwoSided ) {
635                                 GPU_color4_upload(dm,cp2);
636                                 GPU_color_setup(dm);
637                                 glCullFace(GL_FRONT);
638                                 glDrawArrays(GL_TRIANGLES, 0, dm->drawObject->tot_triangle_point);
639                                 glCullFace(GL_BACK);
640                         }
641                 }
642                 GPU_buffer_unbind();
643         }
644
645         glShadeModel(GL_FLAT);
646         glDisable(GL_CULL_FACE);
647 }
648
649 static void cdDM_drawFacesTex_common(DerivedMesh *dm,
650                            int (*drawParams)(MTFace *tface, int has_mcol, int matnr),
651                            int (*drawParamsMapped)(void *userData, int index),
652                            void *userData) 
653 {
654         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
655         MVert *mv = cddm->mvert;
656         MFace *mf = DM_get_face_data_layer(dm, CD_MFACE);
657         MCol *realcol = dm->getFaceDataArray(dm, CD_TEXTURE_MCOL);
658         float *nors= dm->getFaceDataArray(dm, CD_NORMAL);
659         MTFace *tf = DM_get_face_data_layer(dm, CD_MTFACE);
660         int i, j, orig, *index = DM_get_face_data_layer(dm, CD_ORIGINDEX);
661         int startFace = 0, lastFlag = 0xdeadbeef;
662         MCol *mcol = dm->getFaceDataArray(dm, CD_WEIGHT_MCOL);
663         if(!mcol)
664                 mcol = dm->getFaceDataArray(dm, CD_MCOL);
665
666         cdDM_update_normals_from_pbvh(dm);
667
668         if( GPU_buffer_legacy(dm) ) {
669                 DEBUG_VBO( "Using legacy code. cdDM_drawFacesTex_common\n" );
670                 for(i = 0; i < dm->numFaceData; i++, mf++) {
671                         MVert *mvert;
672                         int flag;
673                         unsigned char *cp = NULL;
674
675                         if(drawParams) {
676                                 flag = drawParams(tf? &tf[i]: NULL, (mcol != NULL), mf->mat_nr);
677                         }
678                         else {
679                                 if(index) {
680                                         orig = *index++;
681                                         if(orig == ORIGINDEX_NONE)              { if(nors) nors += 3; continue; }
682                                         if(drawParamsMapped) flag = drawParamsMapped(userData, orig);
683                                         else    { if(nors) nors += 3; continue; }
684                                 }
685                                 else
686                                         if(drawParamsMapped) flag = drawParamsMapped(userData, i);
687                                         else    { if(nors) nors += 3; continue; }
688                         }
689                         
690                         if(flag != 0) {
691                                 if (flag==1 && mcol)
692                                         cp= (unsigned char*) &mcol[i*4];
693
694                                 if(!(mf->flag&ME_SMOOTH)) {
695                                         if (nors) {
696                                                 glNormal3fv(nors);
697                                         }
698                                         else {
699                                                 float nor[3];
700                                                 if(mf->v4) {
701                                                         normal_quad_v3( nor,mv[mf->v1].co, mv[mf->v2].co, mv[mf->v3].co, mv[mf->v4].co);
702                                                 } else {
703                                                         normal_tri_v3( nor,mv[mf->v1].co, mv[mf->v2].co, mv[mf->v3].co);
704                                                 }
705                                                 glNormal3fv(nor);
706                                         }
707                                 }
708
709                                 glBegin(mf->v4?GL_QUADS:GL_TRIANGLES);
710                                 if(tf) glTexCoord2fv(tf[i].uv[0]);
711                                 if(cp) glColor3ub(cp[3], cp[2], cp[1]);
712                                 mvert = &mv[mf->v1];
713                                 if(mf->flag&ME_SMOOTH) glNormal3sv(mvert->no);
714                                 glVertex3fv(mvert->co);
715                                         
716                                 if(tf) glTexCoord2fv(tf[i].uv[1]);
717                                 if(cp) glColor3ub(cp[7], cp[6], cp[5]);
718                                 mvert = &mv[mf->v2];
719                                 if(mf->flag&ME_SMOOTH) glNormal3sv(mvert->no);
720                                 glVertex3fv(mvert->co);
721
722                                 if(tf) glTexCoord2fv(tf[i].uv[2]);
723                                 if(cp) glColor3ub(cp[11], cp[10], cp[9]);
724                                 mvert = &mv[mf->v3];
725                                 if(mf->flag&ME_SMOOTH) glNormal3sv(mvert->no);
726                                 glVertex3fv(mvert->co);
727
728                                 if(mf->v4) {
729                                         if(tf) glTexCoord2fv(tf[i].uv[3]);
730                                         if(cp) glColor3ub(cp[15], cp[14], cp[13]);
731                                         mvert = &mv[mf->v4];
732                                         if(mf->flag&ME_SMOOTH) glNormal3sv(mvert->no);
733                                         glVertex3fv(mvert->co);
734                                 }
735                                 glEnd();
736                         }
737                         
738                         if(nors) nors += 3;
739                 }
740         } else { /* use OpenGL VBOs or Vertex Arrays instead for better, faster rendering */
741                 MCol *col = realcol;
742                 if(!col)
743                         col = mcol;
744
745                 GPU_vertex_setup( dm );
746                 GPU_normal_setup( dm );
747                 GPU_uv_setup( dm );
748                 if( col != NULL ) {
749                         /*if( realcol && dm->drawObject->colType == CD_TEXTURE_MCOL )  {
750                                 col = 0;
751                         } else if( mcol && dm->drawObject->colType == CD_MCOL ) {
752                                 col = 0;
753                         }
754                         
755                         if( col != 0 ) {*/
756                                 unsigned char *colors = MEM_mallocN(dm->getNumFaces(dm)*4*3*sizeof(unsigned char), "cdDM_drawFacesTex_common");
757                                 for( i=0; i < dm->getNumFaces(dm); i++ ) {
758                                         for( j=0; j < 4; j++ ) {
759                                                 colors[i*12+j*3] = col[i*4+j].r;
760                                                 colors[i*12+j*3+1] = col[i*4+j].g;
761                                                 colors[i*12+j*3+2] = col[i*4+j].b;
762                                         }
763                                 }
764                                 GPU_color3_upload(dm,colors);
765                                 MEM_freeN(colors);
766                                 if(realcol)
767                                         dm->drawObject->colType = CD_TEXTURE_MCOL;
768                                 else if(mcol)
769                                         dm->drawObject->colType = CD_MCOL;
770                         //}
771                         GPU_color_setup( dm );
772                 }
773
774                 if( !GPU_buffer_legacy(dm) ) {
775                         /* warning!, this logic is incorrect, see bug [#27175]
776                          * firstly, there are no checks for changes in context, such as texface image.
777                          * secondly, drawParams() sets the GL context, so checking if there is a change
778                          * from lastFlag is too late once glDrawArrays() runs, since drawing the arrays
779                          * will use the modified, OpenGL settings.
780                          * 
781                          * However its tricky to fix this without duplicating the internal logic
782                          * of drawParams(), perhaps we need an argument like...
783                          * drawParams(..., keep_gl_state_but_return_when_changed) ?.
784                          *
785                          * We could also just disable VBO's here, since texface may be deprecated - campbell.
786                          */
787                         
788                         glShadeModel( GL_SMOOTH );
789                         lastFlag = 0;
790                         for(i = 0; i < dm->drawObject->tot_triangle_point/3; i++) {
791                                 int actualFace = dm->drawObject->triangle_to_mface[i];
792                                 int flag = 1;
793
794                                 if(drawParams) {
795                                         flag = drawParams(tf? &tf[actualFace]: NULL, (mcol != NULL), mf[actualFace].mat_nr);
796                                 }
797                                 else {
798                                         if(index) {
799                                                 orig = index[actualFace];
800                                                 if(orig == ORIGINDEX_NONE) continue;
801                                                 if(drawParamsMapped)
802                                                         flag = drawParamsMapped(userData, orig);
803                                         }
804                                         else
805                                                 if(drawParamsMapped)
806                                                         flag = drawParamsMapped(userData, actualFace);
807                                 }
808                                 if( flag != lastFlag ) {
809                                         if( startFace < i ) {
810                                                 if( lastFlag != 0 ) { /* if the flag is 0 it means the face is hidden or invisible */
811                                                         if (lastFlag==1 && col)
812                                                                 GPU_color_switch(1);
813                                                         else
814                                                                 GPU_color_switch(0);
815                                                         glDrawArrays(GL_TRIANGLES,startFace*3,(i-startFace)*3);
816                                                 }
817                                         }
818                                         lastFlag = flag;
819                                         startFace = i;
820                                 }
821                         }
822                         if( startFace < dm->drawObject->tot_triangle_point/3 ) {
823                                 if( lastFlag != 0 ) { /* if the flag is 0 it means the face is hidden or invisible */
824                                         if (lastFlag==1 && col)
825                                                 GPU_color_switch(1);
826                                         else
827                                                 GPU_color_switch(0);
828                                         glDrawArrays(GL_TRIANGLES, startFace*3, dm->drawObject->tot_triangle_point - startFace*3);
829                                 }
830                         }
831                 }
832
833                 GPU_buffer_unbind();
834                 glShadeModel( GL_FLAT );
835         }
836 }
837
838 static void cdDM_drawFacesTex(DerivedMesh *dm, int (*setDrawOptions)(MTFace *tface, int has_mcol, int matnr))
839 {
840         cdDM_drawFacesTex_common(dm, setDrawOptions, NULL, NULL);
841 }
842
843 static void cdDM_drawMappedFaces(DerivedMesh *dm, int (*setDrawOptions)(void *userData, int index, int *drawSmooth_r), void *userData, int useColors, int (*setMaterial)(int, void *attribs),
844                         int (*compareDrawOptions)(void *userData, int cur_index, int next_index))
845 {
846         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
847         MVert *mv = cddm->mvert;
848         MFace *mf = cddm->mface;
849         MCol *mc;
850         float *nors= dm->getFaceDataArray(dm, CD_NORMAL);
851         int i, orig, *index = DM_get_face_data_layer(dm, CD_ORIGINDEX);
852
853         mc = DM_get_face_data_layer(dm, CD_ID_MCOL);
854         if(!mc)
855                 mc = DM_get_face_data_layer(dm, CD_WEIGHT_MCOL);
856         if(!mc)
857                 mc = DM_get_face_data_layer(dm, CD_MCOL);
858
859         cdDM_update_normals_from_pbvh(dm);
860
861         /* back-buffer always uses legacy since VBO's would need the
862          * color array temporarily overwritten for drawing, then reset. */
863         if( GPU_buffer_legacy(dm) || G.f & G_BACKBUFSEL) {
864                 DEBUG_VBO( "Using legacy code. cdDM_drawMappedFaces\n" );
865                 for(i = 0; i < dm->numFaceData; i++, mf++) {
866                         int drawSmooth = (mf->flag & ME_SMOOTH);
867                         int draw= 1;
868
869                         orig= (index==NULL) ? i : *index++;
870                         
871                         if(orig == ORIGINDEX_NONE)
872                                 draw= setMaterial(mf->mat_nr + 1, NULL);
873                         else if (setDrawOptions != NULL)
874                                 draw= setDrawOptions(userData, orig, &drawSmooth);
875
876                         if(draw) {
877                                 unsigned char *cp = NULL;
878
879                                 if(useColors && mc)
880                                         cp = (unsigned char *)&mc[i * 4];
881
882                                 glShadeModel(drawSmooth?GL_SMOOTH:GL_FLAT);
883                                 glBegin(mf->v4?GL_QUADS:GL_TRIANGLES);
884
885                                 if (!drawSmooth) {
886                                         if (nors) {
887                                                 glNormal3fv(nors);
888                                         }
889                                         else {
890                                                 float nor[3];
891                                                 if(mf->v4) {
892                                                         normal_quad_v3( nor,mv[mf->v1].co, mv[mf->v2].co, mv[mf->v3].co, mv[mf->v4].co);
893                                                 } else {
894                                                         normal_tri_v3( nor,mv[mf->v1].co, mv[mf->v2].co, mv[mf->v3].co);
895                                                 }
896                                                 glNormal3fv(nor);
897                                         }
898
899                                         if(cp) glColor3ub(cp[3], cp[2], cp[1]);
900                                         glVertex3fv(mv[mf->v1].co);
901                                         if(cp) glColor3ub(cp[7], cp[6], cp[5]);
902                                         glVertex3fv(mv[mf->v2].co);
903                                         if(cp) glColor3ub(cp[11], cp[10], cp[9]);
904                                         glVertex3fv(mv[mf->v3].co);
905                                         if(mf->v4) {
906                                                 if(cp) glColor3ub(cp[15], cp[14], cp[13]);
907                                                 glVertex3fv(mv[mf->v4].co);
908                                         }
909                                 } else {
910                                         if(cp) glColor3ub(cp[3], cp[2], cp[1]);
911                                         glNormal3sv(mv[mf->v1].no);
912                                         glVertex3fv(mv[mf->v1].co);
913                                         if(cp) glColor3ub(cp[7], cp[6], cp[5]);
914                                         glNormal3sv(mv[mf->v2].no);
915                                         glVertex3fv(mv[mf->v2].co);
916                                         if(cp) glColor3ub(cp[11], cp[10], cp[9]);
917                                         glNormal3sv(mv[mf->v3].no);
918                                         glVertex3fv(mv[mf->v3].co);
919                                         if(mf->v4) {
920                                                 if(cp) glColor3ub(cp[15], cp[14], cp[13]);
921                                                 glNormal3sv(mv[mf->v4].no);
922                                                 glVertex3fv(mv[mf->v4].co);
923                                         }
924                                 }
925
926                                 glEnd();
927                         }
928                         
929                         if (nors) nors += 3;
930                 }
931         }
932         else { /* use OpenGL VBOs or Vertex Arrays instead for better, faster rendering */
933                 int prevstart = 0;
934                 GPU_vertex_setup(dm);
935                 GPU_normal_setup(dm);
936                 if( useColors && mc )
937                         GPU_color_setup(dm);
938                 if( !GPU_buffer_legacy(dm) ) {
939                         int tottri = dm->drawObject->tot_triangle_point/3;
940                         glShadeModel(GL_SMOOTH);
941                         
942                         if(tottri == 0) {
943                                 /* avoid buffer problems in following code */
944                         }
945                         if(setDrawOptions == NULL) {
946                                 /* just draw the entire face array */
947                                 glDrawArrays(GL_TRIANGLES, 0, (tottri-1) * 3);
948                         }
949                         else {
950                                 /* we need to check if the next material changes */
951                                 int next_actualFace= dm->drawObject->triangle_to_mface[0];
952                                 
953                                 for( i = 0; i < tottri; i++ ) {
954                                         //int actualFace = dm->drawObject->triangle_to_mface[i];
955                                         int actualFace = next_actualFace;
956                                         MFace *mface= mf + actualFace;
957                                         int drawSmooth= (mface->flag & ME_SMOOTH);
958                                         int draw = 1;
959                                         int flush = 0;
960
961                                         if(i != tottri-1)
962                                                 next_actualFace= dm->drawObject->triangle_to_mface[i+1];
963
964                                         orig= (index==NULL) ? actualFace : index[actualFace];
965
966                                         if(orig == ORIGINDEX_NONE)
967                                                 draw= setMaterial(mface->mat_nr + 1, NULL);
968                                         else if (setDrawOptions != NULL)
969                                                 draw= setDrawOptions(userData, orig, &drawSmooth);
970         
971                                         /* Goal is to draw as long of a contiguous triangle
972                                            array as possible, so draw when we hit either an
973                                            invisible triangle or at the end of the array */
974
975                                         /* flush buffer if current triangle isn't drawable or it's last triangle... */
976                                         flush= !draw || i == tottri - 1;
977
978                                         /* ... or when material setting is dissferent  */
979                                         flush|= mf[actualFace].mat_nr != mf[next_actualFace].mat_nr;
980
981                                         if(!flush && compareDrawOptions) {
982                                                 int next_orig= (index==NULL) ? next_actualFace : index[next_actualFace];
983
984                                                 if(orig==ORIGINDEX_NONE || next_orig==ORIGINDEX_NONE) {
985                                                         flush= 1;
986                                                 } else {
987                                                         /* also compare draw options and flush buffer if they're different
988                                                            need for face selection highlight in edit mode */
989                                                         flush|= compareDrawOptions(userData, orig, next_orig) == 0;
990                                                 }
991                                         }
992
993                                         if(flush) {
994                                                 int first= prevstart*3;
995                                                 int count= (i-prevstart+(draw ? 1 : 0))*3; /* Add one to the length if we're drawing at the end of the array */
996
997                                                 if(count)
998                                                         glDrawArrays(GL_TRIANGLES, first, count);
999
1000                                                 prevstart = i + 1;
1001                                         }
1002                                 }
1003                         }
1004
1005                         glShadeModel(GL_FLAT);
1006                 }
1007                 GPU_buffer_unbind();
1008         }
1009 }
1010
1011 static void cdDM_drawMappedFacesTex(DerivedMesh *dm, int (*setDrawOptions)(void *userData, int index), void *userData)
1012 {
1013         cdDM_drawFacesTex_common(dm, NULL, setDrawOptions, userData);
1014 }
1015
1016 static void cddm_draw_attrib_vertex(DMVertexAttribs *attribs, MVert *mvert, int a, int index, int vert, int smoothnormal)
1017 {
1018         int b;
1019
1020         /* orco texture coordinates */
1021         if(attribs->totorco) {
1022                 if(attribs->orco.glTexco)
1023                         glTexCoord3fv(attribs->orco.array[index]);
1024                 else
1025                         glVertexAttrib3fvARB(attribs->orco.glIndex, attribs->orco.array[index]);
1026         }
1027
1028         /* uv texture coordinates */
1029         for(b = 0; b < attribs->tottface; b++) {
1030                 MTFace *tf = &attribs->tface[b].array[a];
1031
1032                 if(attribs->tface[b].glTexco)
1033                         glTexCoord2fv(tf->uv[vert]);
1034                 else
1035                         glVertexAttrib2fvARB(attribs->tface[b].glIndex, tf->uv[vert]);
1036         }
1037
1038         /* vertex colors */
1039         for(b = 0; b < attribs->totmcol; b++) {
1040                 MCol *cp = &attribs->mcol[b].array[a*4 + vert];
1041                 GLubyte col[4];
1042                 col[0]= cp->b; col[1]= cp->g; col[2]= cp->r; col[3]= cp->a;
1043                 glVertexAttrib4ubvARB(attribs->mcol[b].glIndex, col);
1044         }
1045
1046         /* tangent for normal mapping */
1047         if(attribs->tottang) {
1048                 float *tang = attribs->tang.array[a*4 + vert];
1049                 glVertexAttrib4fvARB(attribs->tang.glIndex, tang);
1050         }
1051
1052         /* vertex normal */
1053         if(smoothnormal)
1054                 glNormal3sv(mvert[index].no);
1055         
1056         /* vertex coordinate */
1057         glVertex3fv(mvert[index].co);
1058 }
1059
1060 static void cdDM_drawMappedFacesGLSL(DerivedMesh *dm, int (*setMaterial)(int, void *attribs), int (*setDrawOptions)(void *userData, int index), void *userData)
1061 {
1062         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
1063         GPUVertexAttribs gattribs;
1064         DMVertexAttribs attribs;
1065         MVert *mvert = cddm->mvert;
1066         MFace *mface = cddm->mface;
1067         /* MTFace *tf = dm->getFaceDataArray(dm, CD_MTFACE); */ /* UNUSED */
1068         float (*nors)[3] = dm->getFaceDataArray(dm, CD_NORMAL);
1069         int a, b, dodraw, matnr, new_matnr;
1070         int orig, *index = dm->getFaceDataArray(dm, CD_ORIGINDEX);
1071
1072         cdDM_update_normals_from_pbvh(dm);
1073
1074         matnr = -1;
1075         dodraw = 0;
1076
1077         glShadeModel(GL_SMOOTH);
1078
1079         if( GPU_buffer_legacy(dm) || setDrawOptions != NULL ) {
1080                 DEBUG_VBO( "Using legacy code. cdDM_drawMappedFacesGLSL\n" );
1081                 memset(&attribs, 0, sizeof(attribs));
1082
1083                 glBegin(GL_QUADS);
1084
1085                 for(a = 0; a < dm->numFaceData; a++, mface++) {
1086                         const int smoothnormal = (mface->flag & ME_SMOOTH);
1087                         new_matnr = mface->mat_nr + 1;
1088
1089                         if(new_matnr != matnr) {
1090                                 glEnd();
1091
1092                                 dodraw = setMaterial(matnr = new_matnr, &gattribs);
1093                                 if(dodraw)
1094                                         DM_vertex_attributes_from_gpu(dm, &gattribs, &attribs);
1095
1096                                 glBegin(GL_QUADS);
1097                         }
1098
1099                         if(!dodraw) {
1100                                 continue;
1101                         }
1102                         else if(setDrawOptions) {
1103                                 orig = (index)? index[a]: a;
1104
1105                                 if(orig == ORIGINDEX_NONE) {
1106                                         /* since the material is set by setMaterial(), faces with no
1107                                          * origin can be assumed to be generated by a modifier */ 
1108                                         
1109                                         /* continue */
1110                                 }
1111                                 else if(!setDrawOptions(userData, orig))
1112                                         continue;
1113                         }
1114
1115                         if(!smoothnormal) {
1116                                 if(nors) {
1117                                         glNormal3fv(nors[a]);
1118                                 }
1119                                 else {
1120                                         /* TODO ideally a normal layer should always be available */
1121                                         float nor[3];
1122                                         if(mface->v4) {
1123                                                 normal_quad_v3( nor,mvert[mface->v1].co, mvert[mface->v2].co, mvert[mface->v3].co, mvert[mface->v4].co);
1124                                         } else {
1125                                                 normal_tri_v3( nor,mvert[mface->v1].co, mvert[mface->v2].co, mvert[mface->v3].co);
1126                                         }
1127                                         glNormal3fv(nor);
1128                                 }
1129                         }
1130
1131                         cddm_draw_attrib_vertex(&attribs, mvert, a, mface->v1, 0, smoothnormal);
1132                         cddm_draw_attrib_vertex(&attribs, mvert, a, mface->v2, 1, smoothnormal);
1133                         cddm_draw_attrib_vertex(&attribs, mvert, a, mface->v3, 2, smoothnormal);
1134
1135                         if(mface->v4)
1136                                 cddm_draw_attrib_vertex(&attribs, mvert, a, mface->v4, 3, smoothnormal);
1137                         else
1138                                 cddm_draw_attrib_vertex(&attribs, mvert, a, mface->v3, 2, smoothnormal);
1139                 }
1140                 glEnd();
1141         }
1142         else {
1143                 GPUBuffer *buffer = NULL;
1144                 char *varray = NULL;
1145                 int numdata = 0, elementsize = 0, offset;
1146                 int start = 0, numfaces = 0 /* , prevdraw = 0 */ /* UNUSED */, curface = 0;
1147                 int i;
1148
1149                 MFace *mf = mface;
1150                 GPUAttrib datatypes[GPU_MAX_ATTRIB]; /* TODO, messing up when switching materials many times - [#21056]*/
1151                 memset(&attribs, 0, sizeof(attribs));
1152
1153                 GPU_vertex_setup(dm);
1154                 GPU_normal_setup(dm);
1155
1156                 if( !GPU_buffer_legacy(dm) ) {
1157                         for( i = 0; i < dm->drawObject->tot_triangle_point/3; i++ ) {
1158
1159                                 a = dm->drawObject->triangle_to_mface[i];
1160
1161                                 mface = mf + a;
1162                                 new_matnr = mface->mat_nr + 1;
1163
1164                                 if(new_matnr != matnr ) {
1165                                         numfaces = curface - start;
1166                                         if( numfaces > 0 ) {
1167
1168                                                 if( dodraw ) {
1169
1170                                                         if( numdata != 0 ) {
1171
1172                                                                 GPU_buffer_unlock(buffer);
1173
1174                                                                 GPU_interleaved_attrib_setup(buffer,datatypes,numdata);
1175                                                         }
1176
1177                                                         glDrawArrays(GL_TRIANGLES,start*3,numfaces*3);
1178
1179                                                         if( numdata != 0 ) {
1180
1181                                                                 GPU_buffer_free(buffer);
1182
1183                                                                 buffer = NULL;
1184                                                         }
1185
1186                                                 }
1187                                         }
1188                                         numdata = 0;
1189                                         start = curface;
1190                                         /* prevdraw = dodraw; */ /* UNUSED */
1191                                         dodraw = setMaterial(matnr = new_matnr, &gattribs);
1192                                         if(dodraw) {
1193                                                 DM_vertex_attributes_from_gpu(dm, &gattribs, &attribs);
1194
1195                                                 if(attribs.totorco) {
1196                                                         datatypes[numdata].index = attribs.orco.glIndex;
1197                                                         datatypes[numdata].size = 3;
1198                                                         datatypes[numdata].type = GL_FLOAT;
1199                                                         numdata++;
1200                                                 }
1201                                                 for(b = 0; b < attribs.tottface; b++) {
1202                                                         datatypes[numdata].index = attribs.tface[b].glIndex;
1203                                                         datatypes[numdata].size = 2;
1204                                                         datatypes[numdata].type = GL_FLOAT;
1205                                                         numdata++;
1206                                                 }       
1207                                                 for(b = 0; b < attribs.totmcol; b++) {
1208                                                         datatypes[numdata].index = attribs.mcol[b].glIndex;
1209                                                         datatypes[numdata].size = 4;
1210                                                         datatypes[numdata].type = GL_UNSIGNED_BYTE;
1211                                                         numdata++;
1212                                                 }       
1213                                                 if(attribs.tottang) {
1214                                                         datatypes[numdata].index = attribs.tang.glIndex;
1215                                                         datatypes[numdata].size = 4;
1216                                                         datatypes[numdata].type = GL_FLOAT;
1217                                                         numdata++;
1218                                                 }
1219                                                 if( numdata != 0 ) {
1220                                                         elementsize = GPU_attrib_element_size( datatypes, numdata );
1221                                                         buffer = GPU_buffer_alloc( elementsize*dm->drawObject->tot_triangle_point);
1222                                                         if( buffer == NULL ) {
1223                                                                 GPU_buffer_unbind();
1224                                                                 dm->drawObject->legacy = 1;
1225                                                                 return;
1226                                                         }
1227                                                         varray = GPU_buffer_lock_stream(buffer);
1228                                                         if( varray == NULL ) {
1229                                                                 GPU_buffer_unbind();
1230                                                                 GPU_buffer_free(buffer);
1231                                                                 dm->drawObject->legacy = 1;
1232                                                                 return;
1233                                                         }
1234                                                 }
1235                                                 else {
1236                                                         /* if the buffer was set, dont use it again.
1237                                                          * prevdraw was assumed true but didnt run so set to false - [#21036] */
1238                                                         /* prevdraw= 0; */ /* UNUSED */
1239                                                         buffer= NULL;
1240                                                 }
1241                                         }
1242                                 }
1243                                 if(!dodraw) {
1244                                         continue;
1245                                 }
1246
1247                                 if( numdata != 0 ) {
1248                                         offset = 0;
1249                                         if(attribs.totorco) {
1250                                                 VECCOPY((float *)&varray[elementsize*curface*3],(float *)attribs.orco.array[mface->v1]);
1251                                                 VECCOPY((float *)&varray[elementsize*curface*3+elementsize],(float *)attribs.orco.array[mface->v2]);
1252                                                 VECCOPY((float *)&varray[elementsize*curface*3+elementsize*2],(float *)attribs.orco.array[mface->v3]);
1253                                                 offset += sizeof(float)*3;
1254                                         }
1255                                         for(b = 0; b < attribs.tottface; b++) {
1256                                                 MTFace *tf = &attribs.tface[b].array[a];
1257                                                 VECCOPY2D((float *)&varray[elementsize*curface*3+offset],tf->uv[0]);
1258                                                 VECCOPY2D((float *)&varray[elementsize*curface*3+offset+elementsize],tf->uv[1]);
1259
1260                                                 VECCOPY2D((float *)&varray[elementsize*curface*3+offset+elementsize*2],tf->uv[2]);
1261                                                 offset += sizeof(float)*2;
1262                                         }
1263                                         for(b = 0; b < attribs.totmcol; b++) {
1264                                                 MCol *cp = &attribs.mcol[b].array[a*4 + 0];
1265                                                 GLubyte col[4];
1266                                                 col[0]= cp->b; col[1]= cp->g; col[2]= cp->r; col[3]= cp->a;
1267                                                 QUATCOPY((unsigned char *)&varray[elementsize*curface*3+offset], col);
1268                                                 cp = &attribs.mcol[b].array[a*4 + 1];
1269                                                 col[0]= cp->b; col[1]= cp->g; col[2]= cp->r; col[3]= cp->a;
1270                                                 QUATCOPY((unsigned char *)&varray[elementsize*curface*3+offset+elementsize], col);
1271                                                 cp = &attribs.mcol[b].array[a*4 + 2];
1272                                                 col[0]= cp->b; col[1]= cp->g; col[2]= cp->r; col[3]= cp->a;
1273                                                 QUATCOPY((unsigned char *)&varray[elementsize*curface*3+offset+elementsize*2], col);
1274                                                 offset += sizeof(unsigned char)*4;
1275                                         }       
1276                                         if(attribs.tottang) {
1277                                                 float *tang = attribs.tang.array[a*4 + 0];
1278                                                 QUATCOPY((float *)&varray[elementsize*curface*3+offset], tang);
1279                                                 tang = attribs.tang.array[a*4 + 1];
1280                                                 QUATCOPY((float *)&varray[elementsize*curface*3+offset+elementsize], tang);
1281                                                 tang = attribs.tang.array[a*4 + 2];
1282                                                 QUATCOPY((float *)&varray[elementsize*curface*3+offset+elementsize*2], tang);
1283                                                 offset += sizeof(float)*4;
1284                                         }
1285                                         (void)offset;
1286                                 }
1287                                 curface++;
1288                                 if(mface->v4) {
1289                                         if( numdata != 0 ) {
1290                                                 offset = 0;
1291                                                 if(attribs.totorco) {
1292                                                         VECCOPY((float *)&varray[elementsize*curface*3],(float *)attribs.orco.array[mface->v3]);
1293                                                         VECCOPY((float *)&varray[elementsize*curface*3+elementsize],(float *)attribs.orco.array[mface->v4]);
1294                                                         VECCOPY((float *)&varray[elementsize*curface*3+elementsize*2],(float *)attribs.orco.array[mface->v1]);
1295                                                         offset += sizeof(float)*3;
1296                                                 }
1297                                                 for(b = 0; b < attribs.tottface; b++) {
1298                                                         MTFace *tf = &attribs.tface[b].array[a];
1299                                                         VECCOPY2D((float *)&varray[elementsize*curface*3+offset],tf->uv[2]);
1300                                                         VECCOPY2D((float *)&varray[elementsize*curface*3+offset+elementsize],tf->uv[3]);
1301                                                         VECCOPY2D((float *)&varray[elementsize*curface*3+offset+elementsize*2],tf->uv[0]);
1302                                                         offset += sizeof(float)*2;
1303                                                 }
1304                                                 for(b = 0; b < attribs.totmcol; b++) {
1305                                                         MCol *cp = &attribs.mcol[b].array[a*4 + 2];
1306                                                         GLubyte col[4];
1307                                                         col[0]= cp->b; col[1]= cp->g; col[2]= cp->r; col[3]= cp->a;
1308                                                         QUATCOPY((unsigned char *)&varray[elementsize*curface*3+offset], col);
1309                                                         cp = &attribs.mcol[b].array[a*4 + 3];
1310                                                         col[0]= cp->b; col[1]= cp->g; col[2]= cp->r; col[3]= cp->a;
1311                                                         QUATCOPY((unsigned char *)&varray[elementsize*curface*3+offset+elementsize], col);
1312                                                         cp = &attribs.mcol[b].array[a*4 + 0];
1313                                                         col[0]= cp->b; col[1]= cp->g; col[2]= cp->r; col[3]= cp->a;
1314                                                         QUATCOPY((unsigned char *)&varray[elementsize*curface*3+offset+elementsize*2], col);
1315                                                         offset += sizeof(unsigned char)*4;
1316                                                 }       
1317                                                 if(attribs.tottang) {
1318                                                         float *tang = attribs.tang.array[a*4 + 2];
1319                                                         QUATCOPY((float *)&varray[elementsize*curface*3+offset], tang);
1320                                                         tang = attribs.tang.array[a*4 + 3];
1321                                                         QUATCOPY((float *)&varray[elementsize*curface*3+offset+elementsize], tang);
1322                                                         tang = attribs.tang.array[a*4 + 0];
1323                                                         QUATCOPY((float *)&varray[elementsize*curface*3+offset+elementsize*2], tang);
1324                                                         offset += sizeof(float)*4;
1325                                                 }
1326                                                 (void)offset;
1327                                         }
1328                                         curface++;
1329                                         i++;
1330                                 }
1331                         }
1332                         numfaces = curface - start;
1333                         if( numfaces > 0 ) {
1334                                 if( dodraw ) {
1335                                         if( numdata != 0 ) {
1336                                                 GPU_buffer_unlock(buffer);
1337                                                 GPU_interleaved_attrib_setup(buffer,datatypes,numdata);
1338                                         }
1339                                         glDrawArrays(GL_TRIANGLES,start*3,(curface-start)*3);
1340                                 }
1341                         }
1342                         GPU_buffer_unbind();
1343                 }
1344                 GPU_buffer_free(buffer);
1345         }
1346
1347         glShadeModel(GL_FLAT);
1348 }
1349
1350 static void cdDM_drawFacesGLSL(DerivedMesh *dm, int (*setMaterial)(int, void *attribs))
1351 {
1352         dm->drawMappedFacesGLSL(dm, setMaterial, NULL, NULL);
1353 }
1354
1355 static void cdDM_drawMappedEdges(DerivedMesh *dm, int (*setDrawOptions)(void *userData, int index), void *userData)
1356 {
1357         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
1358         MVert *vert = cddm->mvert;
1359         MEdge *edge = cddm->medge;
1360         int i, orig, *index = DM_get_edge_data_layer(dm, CD_ORIGINDEX);
1361
1362         glBegin(GL_LINES);
1363         for(i = 0; i < dm->numEdgeData; i++, edge++) {
1364                 if(index) {
1365                         orig = *index++;
1366                         if(setDrawOptions && orig == ORIGINDEX_NONE) continue;
1367                 }
1368                 else
1369                         orig = i;
1370
1371                 if(!setDrawOptions || setDrawOptions(userData, orig)) {
1372                         glVertex3fv(vert[edge->v1].co);
1373                         glVertex3fv(vert[edge->v2].co);
1374                 }
1375         }
1376         glEnd();
1377 }
1378
1379 static void cdDM_foreachMappedVert(
1380                                                    DerivedMesh *dm,
1381                                                    void (*func)(void *userData, int index, float *co,
1382                                                                                 float *no_f, short *no_s),
1383                                                    void *userData)
1384 {
1385         MVert *mv = CDDM_get_verts(dm);
1386         int i, orig, *index = DM_get_vert_data_layer(dm, CD_ORIGINDEX);
1387
1388         for(i = 0; i < dm->numVertData; i++, mv++) {
1389                 if(index) {
1390                         orig = *index++;
1391                         if(orig == ORIGINDEX_NONE) continue;
1392                         func(userData, orig, mv->co, NULL, mv->no);
1393                 }
1394                 else
1395                         func(userData, i, mv->co, NULL, mv->no);
1396         }
1397 }
1398
1399 static void cdDM_foreachMappedEdge(
1400                                                    DerivedMesh *dm,
1401                                                    void (*func)(void *userData, int index,
1402                                                                                 float *v0co, float *v1co),
1403                                                    void *userData)
1404 {
1405         CDDerivedMesh *cddm = (CDDerivedMesh*) dm;
1406         MVert *mv = cddm->mvert;
1407         MEdge *med = cddm->medge;
1408         int i, orig, *index = DM_get_edge_data_layer(dm, CD_ORIGINDEX);
1409
1410         for(i = 0; i < dm->numEdgeData; i++, med++) {
1411                 if (index) {
1412                         orig = *index++;
1413                         if(orig == ORIGINDEX_NONE) continue;
1414                         func(userData, orig, mv[med->v1].co, mv[med->v2].co);
1415                 }
1416                 else
1417                         func(userData, i, mv[med->v1].co, mv[med->v2].co);
1418         }
1419 }
1420
1421 static void cdDM_foreachMappedFaceCenter(
1422                                                    DerivedMesh *dm,
1423                                                    void (*func)(void *userData, int index,
1424                                                                                 float *cent, float *no),
1425                                                    void *userData)
1426 {
1427         CDDerivedMesh *cddm = (CDDerivedMesh*)dm;
1428         MVert *mv = cddm->mvert;
1429         MFace *mf = cddm->mface;
1430         int i, orig, *index = DM_get_face_data_layer(dm, CD_ORIGINDEX);
1431
1432         for(i = 0; i < dm->numFaceData; i++, mf++) {
1433                 float cent[3];
1434                 float no[3];
1435
1436                 if (index) {
1437                         orig = *index++;
1438                         if(orig == ORIGINDEX_NONE) continue;
1439                 }
1440                 else
1441                         orig = i;
1442
1443                 VECCOPY(cent, mv[mf->v1].co);
1444                 add_v3_v3(cent, mv[mf->v2].co);
1445                 add_v3_v3(cent, mv[mf->v3].co);
1446
1447                 if (mf->v4) {
1448                         normal_quad_v3( no,mv[mf->v1].co, mv[mf->v2].co, mv[mf->v3].co, mv[mf->v4].co);
1449                         add_v3_v3(cent, mv[mf->v4].co);
1450                         mul_v3_fl(cent, 0.25f);
1451                 } else {
1452                         normal_tri_v3( no,mv[mf->v1].co, mv[mf->v2].co, mv[mf->v3].co);
1453                         mul_v3_fl(cent, 0.33333333333f);
1454                 }
1455
1456                 func(userData, orig, cent, no);
1457         }
1458 }
1459
1460 static void cdDM_free_internal(CDDerivedMesh *cddm)
1461 {
1462         if(cddm->fmap) MEM_freeN(cddm->fmap);
1463         if(cddm->fmap_mem) MEM_freeN(cddm->fmap_mem);
1464 }
1465
1466 static void cdDM_release(DerivedMesh *dm)
1467 {
1468         CDDerivedMesh *cddm = (CDDerivedMesh*)dm;
1469
1470         if (DM_release(dm)) {
1471                 cdDM_free_internal(cddm);
1472                 MEM_freeN(cddm);
1473         }
1474 }
1475
1476 /**************** CDDM interface functions ****************/
1477 static CDDerivedMesh *cdDM_create(const char *desc)
1478 {
1479         CDDerivedMesh *cddm;
1480         DerivedMesh *dm;
1481
1482         cddm = MEM_callocN(sizeof(*cddm), desc);
1483         dm = &cddm->dm;
1484
1485         dm->getMinMax = cdDM_getMinMax;
1486
1487         dm->getNumVerts = cdDM_getNumVerts;
1488         dm->getNumFaces = cdDM_getNumFaces;
1489         dm->getNumEdges = cdDM_getNumEdges;
1490
1491         dm->getVert = cdDM_getVert;
1492         dm->getEdge = cdDM_getEdge;
1493         dm->getFace = cdDM_getFace;
1494         dm->copyVertArray = cdDM_copyVertArray;
1495         dm->copyEdgeArray = cdDM_copyEdgeArray;
1496         dm->copyFaceArray = cdDM_copyFaceArray;
1497         dm->getVertData = DM_get_vert_data;
1498         dm->getEdgeData = DM_get_edge_data;
1499         dm->getFaceData = DM_get_face_data;
1500         dm->getVertDataArray = DM_get_vert_data_layer;
1501         dm->getEdgeDataArray = DM_get_edge_data_layer;
1502         dm->getFaceDataArray = DM_get_face_data_layer;
1503
1504         dm->getVertCos = cdDM_getVertCos;
1505         dm->getVertCo = cdDM_getVertCo;
1506         dm->getVertNo = cdDM_getVertNo;
1507
1508         dm->getPBVH = cdDM_getPBVH;
1509         dm->getFaceMap = cdDM_getFaceMap;
1510
1511         dm->drawVerts = cdDM_drawVerts;
1512
1513         dm->drawUVEdges = cdDM_drawUVEdges;
1514         dm->drawEdges = cdDM_drawEdges;
1515         dm->drawLooseEdges = cdDM_drawLooseEdges;
1516         dm->drawMappedEdges = cdDM_drawMappedEdges;
1517
1518         dm->drawFacesSolid = cdDM_drawFacesSolid;
1519         dm->drawFacesColored = cdDM_drawFacesColored;
1520         dm->drawFacesTex = cdDM_drawFacesTex;
1521         dm->drawFacesGLSL = cdDM_drawFacesGLSL;
1522         dm->drawMappedFaces = cdDM_drawMappedFaces;
1523         dm->drawMappedFacesTex = cdDM_drawMappedFacesTex;
1524         dm->drawMappedFacesGLSL = cdDM_drawMappedFacesGLSL;
1525
1526         dm->foreachMappedVert = cdDM_foreachMappedVert;
1527         dm->foreachMappedEdge = cdDM_foreachMappedEdge;
1528         dm->foreachMappedFaceCenter = cdDM_foreachMappedFaceCenter;
1529
1530         dm->release = cdDM_release;
1531
1532         return cddm;
1533 }
1534
1535 DerivedMesh *CDDM_new(int numVerts, int numEdges, int numFaces)
1536 {
1537         CDDerivedMesh *cddm = cdDM_create("CDDM_new dm");
1538         DerivedMesh *dm = &cddm->dm;
1539
1540         DM_init(dm, DM_TYPE_CDDM, numVerts, numEdges, numFaces);
1541
1542         CustomData_add_layer(&dm->vertData, CD_ORIGINDEX, CD_CALLOC, NULL, numVerts);
1543         CustomData_add_layer(&dm->edgeData, CD_ORIGINDEX, CD_CALLOC, NULL, numEdges);
1544         CustomData_add_layer(&dm->faceData, CD_ORIGINDEX, CD_CALLOC, NULL, numFaces);
1545
1546         CustomData_add_layer(&dm->vertData, CD_MVERT, CD_CALLOC, NULL, numVerts);
1547         CustomData_add_layer(&dm->edgeData, CD_MEDGE, CD_CALLOC, NULL, numEdges);
1548         CustomData_add_layer(&dm->faceData, CD_MFACE, CD_CALLOC, NULL, numFaces);
1549
1550         cddm->mvert = CustomData_get_layer(&dm->vertData, CD_MVERT);
1551         cddm->medge = CustomData_get_layer(&dm->edgeData, CD_MEDGE);
1552         cddm->mface = CustomData_get_layer(&dm->faceData, CD_MFACE);
1553
1554         return dm;
1555 }
1556
1557 DerivedMesh *CDDM_from_mesh(Mesh *mesh, Object *UNUSED(ob))
1558 {
1559         CDDerivedMesh *cddm = cdDM_create("CDDM_from_mesh dm");
1560         DerivedMesh *dm = &cddm->dm;
1561         CustomDataMask mask = CD_MASK_MESH & (~CD_MASK_MDISPS);
1562         int alloctype;
1563
1564         /* this does a referenced copy, with an exception for fluidsim */
1565
1566         DM_init(dm, DM_TYPE_CDDM, mesh->totvert, mesh->totedge, mesh->totface);
1567
1568         dm->deformedOnly = 1;
1569
1570         alloctype= CD_REFERENCE;
1571
1572         CustomData_merge(&mesh->vdata, &dm->vertData, mask, alloctype,
1573                                          mesh->totvert);
1574         CustomData_merge(&mesh->edata, &dm->edgeData, mask, alloctype,
1575                                          mesh->totedge);
1576         CustomData_merge(&mesh->fdata, &dm->faceData, mask, alloctype,
1577                                          mesh->totface);
1578
1579         cddm->mvert = CustomData_get_layer(&dm->vertData, CD_MVERT);
1580         cddm->medge = CustomData_get_layer(&dm->edgeData, CD_MEDGE);
1581         cddm->mface = CustomData_get_layer(&dm->faceData, CD_MFACE);
1582
1583         return dm;
1584 }
1585
1586 DerivedMesh *CDDM_from_editmesh(EditMesh *em, Mesh *UNUSED(me))
1587 {
1588         DerivedMesh *dm = CDDM_new(BLI_countlist(&em->verts),
1589                                                            BLI_countlist(&em->edges),
1590                                                            BLI_countlist(&em->faces));
1591         CDDerivedMesh *cddm = (CDDerivedMesh*)dm;
1592         EditVert *eve;
1593         EditEdge *eed;
1594         EditFace *efa;
1595         MVert *mvert = cddm->mvert;
1596         MEdge *medge = cddm->medge;
1597         MFace *mface = cddm->mface;
1598         int i, *index;
1599
1600         dm->deformedOnly = 1;
1601
1602         CustomData_merge(&em->vdata, &dm->vertData, CD_MASK_DERIVEDMESH,
1603                                          CD_CALLOC, dm->numVertData);
1604         /* CustomData_merge(&em->edata, &dm->edgeData, CD_MASK_DERIVEDMESH,
1605                                          CD_CALLOC, dm->numEdgeData); */
1606         CustomData_merge(&em->fdata, &dm->faceData, CD_MASK_DERIVEDMESH,
1607                                          CD_CALLOC, dm->numFaceData);
1608
1609         /* set eve->hash to vert index */
1610         for(i = 0, eve = em->verts.first; eve; eve = eve->next, ++i)
1611                 eve->tmp.l = i;
1612
1613         /* Need to be able to mark loose edges */
1614         for(eed = em->edges.first; eed; eed = eed->next) {
1615                 eed->f2 = 0;
1616         }
1617         for(efa = em->faces.first; efa; efa = efa->next) {
1618                 efa->e1->f2 = 1;
1619                 efa->e2->f2 = 1;
1620                 efa->e3->f2 = 1;
1621                 if(efa->e4) efa->e4->f2 = 1;
1622         }
1623
1624         index = dm->getVertDataArray(dm, CD_ORIGINDEX);
1625         for(i = 0, eve = em->verts.first; i < dm->numVertData;
1626                 i++, eve = eve->next, index++) {
1627                 MVert *mv = &mvert[i];
1628
1629                 VECCOPY(mv->co, eve->co);
1630
1631                 normal_float_to_short_v3(mv->no, eve->no);
1632                 mv->bweight = (unsigned char) (eve->bweight * 255.0f);
1633
1634                 mv->flag = 0;
1635
1636                 *index = i;
1637
1638                 CustomData_from_em_block(&em->vdata, &dm->vertData, eve->data, i);
1639         }
1640
1641         index = dm->getEdgeDataArray(dm, CD_ORIGINDEX);
1642         for(i = 0, eed = em->edges.first; i < dm->numEdgeData;
1643                 i++, eed = eed->next, index++) {
1644                 MEdge *med = &medge[i];
1645
1646                 med->v1 = eed->v1->tmp.l;
1647                 med->v2 = eed->v2->tmp.l;
1648                 med->crease = (unsigned char) (eed->crease * 255.0f);
1649                 med->bweight = (unsigned char) (eed->bweight * 255.0f);
1650                 med->flag = ME_EDGEDRAW|ME_EDGERENDER;
1651                 
1652                 if(eed->seam) med->flag |= ME_SEAM;
1653                 if(eed->sharp) med->flag |= ME_SHARP;
1654                 if(!eed->f2) med->flag |= ME_LOOSEEDGE;
1655
1656                 *index = i;
1657
1658                 /* CustomData_from_em_block(&em->edata, &dm->edgeData, eed->data, i); */
1659         }
1660
1661         index = dm->getFaceDataArray(dm, CD_ORIGINDEX);
1662         for(i = 0, efa = em->faces.first; i < dm->numFaceData;
1663                 i++, efa = efa->next, index++) {
1664                 MFace *mf = &mface[i];
1665
1666                 mf->v1 = efa->v1->tmp.l;
1667                 mf->v2 = efa->v2->tmp.l;
1668                 mf->v3 = efa->v3->tmp.l;
1669                 mf->v4 = efa->v4 ? efa->v4->tmp.l : 0;
1670                 mf->mat_nr = efa->mat_nr;
1671                 mf->flag = efa->flag;
1672
1673                 *index = i;
1674
1675                 CustomData_from_em_block(&em->fdata, &dm->faceData, efa->data, i);
1676                 test_index_face(mf, &dm->faceData, i, efa->v4?4:3);
1677         }
1678
1679         return dm;
1680 }
1681
1682 DerivedMesh *CDDM_from_curve(Object *ob)
1683 {
1684         return CDDM_from_curve_customDB(ob, &ob->disp);
1685 }
1686
1687 DerivedMesh *CDDM_from_curve_customDB(Object *ob, ListBase *dispbase)
1688 {
1689         DerivedMesh *dm;
1690         CDDerivedMesh *cddm;
1691         MVert *allvert;
1692         MEdge *alledge;
1693         MFace *allface;
1694         int totvert, totedge, totface;
1695
1696         if (nurbs_to_mdata_customdb(ob, dispbase, &allvert, &totvert, &alledge,
1697                 &totedge, &allface, &totface) != 0) {
1698                 /* Error initializing mdata. This often happens when curve is empty */
1699                 return CDDM_new(0, 0, 0);
1700         }
1701
1702         dm = CDDM_new(totvert, totedge, totface);
1703         dm->deformedOnly = 1;
1704
1705         cddm = (CDDerivedMesh*)dm;
1706
1707         memcpy(cddm->mvert, allvert, totvert*sizeof(MVert));
1708         memcpy(cddm->medge, alledge, totedge*sizeof(MEdge));
1709         memcpy(cddm->mface, allface, totface*sizeof(MFace));
1710
1711         MEM_freeN(allvert);
1712         MEM_freeN(alledge);
1713         MEM_freeN(allface);
1714
1715         return dm;
1716 }
1717
1718 DerivedMesh *CDDM_copy(DerivedMesh *source)
1719 {
1720         CDDerivedMesh *cddm = cdDM_create("CDDM_copy cddm");
1721         DerivedMesh *dm = &cddm->dm;
1722         int numVerts = source->numVertData;
1723         int numEdges = source->numEdgeData;
1724         int numFaces = source->numFaceData;
1725
1726         /* ensure these are created if they are made on demand */
1727         source->getVertDataArray(source, CD_ORIGINDEX);
1728         source->getEdgeDataArray(source, CD_ORIGINDEX);
1729         source->getFaceDataArray(source, CD_ORIGINDEX);
1730
1731         /* this initializes dm, and copies all non mvert/medge/mface layers */
1732         DM_from_template(dm, source, DM_TYPE_CDDM, numVerts, numEdges, numFaces);
1733         dm->deformedOnly = source->deformedOnly;
1734
1735         CustomData_copy_data(&source->vertData, &dm->vertData, 0, 0, numVerts);
1736         CustomData_copy_data(&source->edgeData, &dm->edgeData, 0, 0, numEdges);
1737         CustomData_copy_data(&source->faceData, &dm->faceData, 0, 0, numFaces);
1738
1739         /* now add mvert/medge/mface layers */
1740         cddm->mvert = source->dupVertArray(source);
1741         cddm->medge = source->dupEdgeArray(source);
1742         cddm->mface = source->dupFaceArray(source);
1743
1744         CustomData_add_layer(&dm->vertData, CD_MVERT, CD_ASSIGN, cddm->mvert, numVerts);
1745         CustomData_add_layer(&dm->edgeData, CD_MEDGE, CD_ASSIGN, cddm->medge, numEdges);
1746         CustomData_add_layer(&dm->faceData, CD_MFACE, CD_ASSIGN, cddm->mface, numFaces);
1747
1748         return dm;
1749 }
1750
1751 /* note, the CD_ORIGINDEX layers are all 0, so if there is a direct
1752  * relationship betwen mesh data this needs to be set by the caller. */
1753 DerivedMesh *CDDM_from_template(DerivedMesh *source,
1754                                                                 int numVerts, int numEdges, int numFaces)
1755 {
1756         CDDerivedMesh *cddm = cdDM_create("CDDM_from_template dest");
1757         DerivedMesh *dm = &cddm->dm;
1758
1759         /* ensure these are created if they are made on demand */
1760         source->getVertDataArray(source, CD_ORIGINDEX);
1761         source->getEdgeDataArray(source, CD_ORIGINDEX);
1762         source->getFaceDataArray(source, CD_ORIGINDEX);
1763
1764         /* this does a copy of all non mvert/medge/mface layers */
1765         DM_from_template(dm, source, DM_TYPE_CDDM, numVerts, numEdges, numFaces);
1766
1767         /* now add mvert/medge/mface layers */
1768         CustomData_add_layer(&dm->vertData, CD_MVERT, CD_CALLOC, NULL, numVerts);
1769         CustomData_add_layer(&dm->edgeData, CD_MEDGE, CD_CALLOC, NULL, numEdges);
1770         CustomData_add_layer(&dm->faceData, CD_MFACE, CD_CALLOC, NULL, numFaces);
1771
1772         if(!CustomData_get_layer(&dm->vertData, CD_ORIGINDEX))
1773                 CustomData_add_layer(&dm->vertData, CD_ORIGINDEX, CD_CALLOC, NULL, numVerts);
1774         if(!CustomData_get_layer(&dm->edgeData, CD_ORIGINDEX))
1775                 CustomData_add_layer(&dm->edgeData, CD_ORIGINDEX, CD_CALLOC, NULL, numEdges);
1776         if(!CustomData_get_layer(&dm->faceData, CD_ORIGINDEX))
1777                 CustomData_add_layer(&dm->faceData, CD_ORIGINDEX, CD_CALLOC, NULL, numFaces);
1778
1779         cddm->mvert = CustomData_get_layer(&dm->vertData, CD_MVERT);
1780         cddm->medge = CustomData_get_layer(&dm->edgeData, CD_MEDGE);
1781         cddm->mface = CustomData_get_layer(&dm->faceData, CD_MFACE);
1782
1783         return dm;
1784 }
1785
1786 void CDDM_apply_vert_coords(DerivedMesh *dm, float (*vertCoords)[3])
1787 {
1788         CDDerivedMesh *cddm = (CDDerivedMesh*)dm;
1789         MVert *vert;
1790         int i;
1791
1792         /* this will just return the pointer if it wasn't a referenced layer */
1793         vert = CustomData_duplicate_referenced_layer(&dm->vertData, CD_MVERT);
1794         cddm->mvert = vert;
1795
1796         for(i = 0; i < dm->numVertData; ++i, ++vert)
1797                 VECCOPY(vert->co, vertCoords[i]);
1798 }
1799
1800 void CDDM_apply_vert_normals(DerivedMesh *dm, short (*vertNormals)[3])
1801 {
1802         CDDerivedMesh *cddm = (CDDerivedMesh*)dm;
1803         MVert *vert;
1804         int i;
1805
1806         /* this will just return the pointer if it wasn't a referenced layer */
1807         vert = CustomData_duplicate_referenced_layer(&dm->vertData, CD_MVERT);
1808         cddm->mvert = vert;
1809
1810         for(i = 0; i < dm->numVertData; ++i, ++vert)
1811                 copy_v3_v3_short(vert->no, vertNormals[i]);
1812 }
1813
1814 void CDDM_calc_normals(DerivedMesh *dm)
1815 {
1816         CDDerivedMesh *cddm = (CDDerivedMesh*)dm;
1817         float (*face_nors)[3];
1818
1819         if(dm->numVertData == 0) return;
1820
1821         /* we don't want to overwrite any referenced layers */
1822         cddm->mvert = CustomData_duplicate_referenced_layer(&dm->vertData, CD_MVERT);
1823
1824         /* make a face normal layer if not present */
1825         face_nors = CustomData_get_layer(&dm->faceData, CD_NORMAL);
1826         if(!face_nors)
1827                 face_nors = CustomData_add_layer(&dm->faceData, CD_NORMAL, CD_CALLOC,
1828                                                                                  NULL, dm->numFaceData);
1829
1830         /* calculate face normals */
1831         mesh_calc_normals(cddm->mvert, dm->numVertData, CDDM_get_faces(dm), dm->numFaceData, face_nors);
1832 }
1833
1834 void CDDM_calc_edges(DerivedMesh *dm)
1835 {
1836         CDDerivedMesh *cddm = (CDDerivedMesh*)dm;
1837         CustomData edgeData;
1838         EdgeHashIterator *ehi;
1839         MFace *mf = cddm->mface;
1840         MEdge *med;
1841         EdgeHash *eh = BLI_edgehash_new();
1842         int i, *index, numEdges, maxFaces = dm->numFaceData;
1843
1844         for (i = 0; i < maxFaces; i++, mf++) {
1845                 if (!BLI_edgehash_haskey(eh, mf->v1, mf->v2))
1846                         BLI_edgehash_insert(eh, mf->v1, mf->v2, NULL);
1847                 if (!BLI_edgehash_haskey(eh, mf->v2, mf->v3))
1848                         BLI_edgehash_insert(eh, mf->v2, mf->v3, NULL);
1849                 
1850                 if (mf->v4) {
1851                         if (!BLI_edgehash_haskey(eh, mf->v3, mf->v4))
1852                                 BLI_edgehash_insert(eh, mf->v3, mf->v4, NULL);
1853                         if (!BLI_edgehash_haskey(eh, mf->v4, mf->v1))
1854                                 BLI_edgehash_insert(eh, mf->v4, mf->v1, NULL);
1855                 } else {
1856                         if (!BLI_edgehash_haskey(eh, mf->v3, mf->v1))
1857                                 BLI_edgehash_insert(eh, mf->v3, mf->v1, NULL);
1858                 }
1859         }
1860
1861         numEdges = BLI_edgehash_size(eh);
1862
1863         /* write new edges into a temporary CustomData */
1864         memset(&edgeData, 0, sizeof(edgeData));
1865         CustomData_add_layer(&edgeData, CD_MEDGE, CD_CALLOC, NULL, numEdges);
1866         CustomData_add_layer(&edgeData, CD_ORIGINDEX, CD_CALLOC, NULL, numEdges);
1867
1868         ehi = BLI_edgehashIterator_new(eh);
1869         med = CustomData_get_layer(&edgeData, CD_MEDGE);
1870         index = CustomData_get_layer(&edgeData, CD_ORIGINDEX);
1871         for(i = 0; !BLI_edgehashIterator_isDone(ehi);
1872                 BLI_edgehashIterator_step(ehi), ++i, ++med, ++index) {
1873                 BLI_edgehashIterator_getKey(ehi, (int*)&med->v1, (int*)&med->v2);
1874
1875                 med->flag = ME_EDGEDRAW|ME_EDGERENDER;
1876                 *index = ORIGINDEX_NONE;
1877         }
1878         BLI_edgehashIterator_free(ehi);
1879
1880         /* free old CustomData and assign new one */
1881         CustomData_free(&dm->edgeData, dm->numEdgeData);
1882         dm->edgeData = edgeData;
1883         dm->numEdgeData = numEdges;
1884
1885         cddm->medge = CustomData_get_layer(&dm->edgeData, CD_MEDGE);
1886
1887         BLI_edgehash_free(eh, NULL);
1888 }
1889
1890 void CDDM_lower_num_verts(DerivedMesh *dm, int numVerts)
1891 {
1892         if (numVerts < dm->numVertData)
1893                 CustomData_free_elem(&dm->vertData, numVerts, dm->numVertData-numVerts);
1894
1895         dm->numVertData = numVerts;
1896 }
1897
1898 void CDDM_lower_num_edges(DerivedMesh *dm, int numEdges)
1899 {
1900         if (numEdges < dm->numEdgeData)
1901                 CustomData_free_elem(&dm->edgeData, numEdges, dm->numEdgeData-numEdges);
1902
1903         dm->numEdgeData = numEdges;
1904 }
1905
1906 void CDDM_lower_num_faces(DerivedMesh *dm, int numFaces)
1907 {
1908         if (numFaces < dm->numFaceData)
1909                 CustomData_free_elem(&dm->faceData, numFaces, dm->numFaceData-numFaces);
1910
1911         dm->numFaceData = numFaces;
1912 }
1913
1914 MVert *CDDM_get_vert(DerivedMesh *dm, int index)
1915 {
1916         return &((CDDerivedMesh*)dm)->mvert[index];
1917 }
1918
1919 MEdge *CDDM_get_edge(DerivedMesh *dm, int index)
1920 {
1921         return &((CDDerivedMesh*)dm)->medge[index];
1922 }
1923
1924 MFace *CDDM_get_face(DerivedMesh *dm, int index)
1925 {
1926         return &((CDDerivedMesh*)dm)->mface[index];
1927 }
1928
1929 MVert *CDDM_get_verts(DerivedMesh *dm)
1930 {
1931         return ((CDDerivedMesh*)dm)->mvert;
1932 }
1933
1934 MEdge *CDDM_get_edges(DerivedMesh *dm)
1935 {
1936         return ((CDDerivedMesh*)dm)->medge;
1937 }
1938
1939 MFace *CDDM_get_faces(DerivedMesh *dm)
1940 {
1941         return ((CDDerivedMesh*)dm)->mface;
1942 }
1943