svn merge ^/trunk/blender -r43220:43278 --accept postpone
[blender.git] / source / blender / blenkernel / intern / DerivedMesh.c
1 /*
2  * ***** BEGIN GPL LICENSE BLOCK *****
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License
6  * as published by the Free Software Foundation; either version 2
7  * of the License, or (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software Foundation,
16  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17  *
18  * The Original Code is Copyright (C) 2005 Blender Foundation.
19  * All rights reserved.
20  *
21  * The Original Code is: all of this file.
22  *
23  * Contributor(s): none yet.
24  *
25  * ***** END GPL LICENSE BLOCK *****
26  */
27
28 /** \file blender/blenkernel/intern/DerivedMesh.c
29  *  \ingroup bke
30  */
31
32
33 #include <string.h>
34 #include "limits.h"
35
36 #include "MEM_guardedalloc.h"
37
38 #include "DNA_cloth_types.h"
39 #include "DNA_key_types.h"
40 #include "DNA_meshdata_types.h"
41 #include "DNA_armature_types.h"
42 #include "DNA_object_types.h"
43 #include "DNA_scene_types.h" // N_T
44
45 #include "BLI_blenlib.h"
46 #include "BLI_editVert.h"
47 #include "BLI_math.h"
48 #include "BLI_memarena.h"
49 #include "BLI_array.h"
50 #include "BLI_pbvh.h"
51 #include "BLI_utildefines.h"
52 #include "BLI_linklist.h"
53
54 #include "BKE_cdderivedmesh.h"
55 #include "BKE_displist.h"
56 #include "BKE_key.h"
57 #include "BKE_modifier.h"
58 #include "BKE_mesh.h"
59 #include "BKE_object.h"
60 #include "BKE_paint.h"
61 #include "BKE_texture.h"
62 #include "BKE_multires.h"
63 #include "BKE_armature.h"
64 #include "BKE_particle.h"
65 #include "BKE_tessmesh.h"
66 #include "BKE_bvhutils.h"
67 #include "BKE_deform.h"
68
69 #ifdef WITH_GAMEENGINE
70 #include "BKE_navmesh_conversion.h"
71 static DerivedMesh *navmesh_dm_createNavMeshForVisualization(DerivedMesh *dm);
72 #endif
73
74 #include "BLO_sys_types.h" // for intptr_t support
75
76 #include "GL/glew.h"
77
78 #include "GPU_buffers.h"
79 #include "GPU_draw.h"
80 #include "GPU_extensions.h"
81 #include "GPU_material.h"
82
83 extern GLubyte stipple_quarttone[128]; /* glutil.c, bad level data */
84
85 static void add_shapekey_layers(DerivedMesh *dm, Mesh *me, Object *ob);
86 static void shapekey_layers_to_keyblocks(DerivedMesh *dm, Mesh *me, int actshape_uid);
87
88 ///////////////////////////////////
89 ///////////////////////////////////
90
91 static MVert *dm_getVertArray(DerivedMesh *dm)
92 {
93         MVert *mvert = CustomData_get_layer(&dm->vertData, CD_MVERT);
94
95         if (!mvert) {
96                 mvert = CustomData_add_layer(&dm->vertData, CD_MVERT, CD_CALLOC, NULL,
97                         dm->getNumVerts(dm));
98                 CustomData_set_layer_flag(&dm->vertData, CD_MVERT, CD_FLAG_TEMPORARY);
99                 dm->copyVertArray(dm, mvert);
100         }
101
102         return mvert;
103 }
104
105 static MEdge *dm_getEdgeArray(DerivedMesh *dm)
106 {
107         MEdge *medge = CustomData_get_layer(&dm->edgeData, CD_MEDGE);
108
109         if (!medge) {
110                 medge = CustomData_add_layer(&dm->edgeData, CD_MEDGE, CD_CALLOC, NULL,
111                         dm->getNumEdges(dm));
112                 CustomData_set_layer_flag(&dm->edgeData, CD_MEDGE, CD_FLAG_TEMPORARY);
113                 dm->copyEdgeArray(dm, medge);
114         }
115
116         return medge;
117 }
118
119 static MFace *dm_getTessFaceArray(DerivedMesh *dm)
120 {
121         MFace *mface = CustomData_get_layer(&dm->faceData, CD_MFACE);
122
123         if (!mface) {
124                 mface = CustomData_add_layer(&dm->faceData, CD_MFACE, CD_CALLOC, NULL,
125                         dm->getNumTessFaces(dm));
126                 CustomData_set_layer_flag(&dm->faceData, CD_MFACE, CD_FLAG_TEMPORARY);
127                 dm->copyTessFaceArray(dm, mface);
128         }
129
130         return mface;
131 }
132
133 static MLoop *dm_getLoopArray(DerivedMesh *dm)
134 {
135         MLoop *mloop = CustomData_get_layer(&dm->loopData, CD_MLOOP);
136
137         if (!mloop) {
138                 mloop = CustomData_add_layer(&dm->loopData, CD_MLOOP, CD_CALLOC, NULL,
139                         dm->getNumLoops(dm));
140                 CustomData_set_layer_flag(&dm->loopData, CD_MLOOP, CD_FLAG_TEMPORARY);
141                 dm->copyLoopArray(dm, mloop);
142         }
143
144         return mloop;
145 }
146
147 static MPoly *dm_getPolyArray(DerivedMesh *dm)
148 {
149         MPoly *mpoly = CustomData_get_layer(&dm->polyData, CD_MPOLY);
150
151         if (!mpoly) {
152                 mpoly = CustomData_add_layer(&dm->polyData, CD_MPOLY, CD_CALLOC, NULL,
153                         dm->getNumPolys(dm));
154                 CustomData_set_layer_flag(&dm->polyData, CD_MPOLY, CD_FLAG_TEMPORARY);
155                 dm->copyPolyArray(dm, mpoly);
156         }
157
158         return mpoly;
159 }
160
161 static MVert *dm_dupVertArray(DerivedMesh *dm)
162 {
163         MVert *tmp = MEM_callocN(sizeof(*tmp) * dm->getNumVerts(dm),
164                                                          "dm_dupVertArray tmp");
165
166         if(tmp) dm->copyVertArray(dm, tmp);
167
168         return tmp;
169 }
170
171 static MEdge *dm_dupEdgeArray(DerivedMesh *dm)
172 {
173         MEdge *tmp = MEM_callocN(sizeof(*tmp) * dm->getNumEdges(dm),
174                                                          "dm_dupEdgeArray tmp");
175
176         if(tmp) dm->copyEdgeArray(dm, tmp);
177
178         return tmp;
179 }
180
181 static MFace *dm_dupFaceArray(DerivedMesh *dm)
182 {
183         MFace *tmp = MEM_callocN(sizeof(*tmp) * dm->getNumTessFaces(dm),
184                                                          "dm_dupFaceArray tmp");
185
186         if(tmp) dm->copyTessFaceArray(dm, tmp);
187
188         return tmp;
189 }
190
191 static MLoop *dm_dupLoopArray(DerivedMesh *dm)
192 {
193         MLoop *tmp = MEM_callocN(sizeof(*tmp) * dm->getNumLoops(dm),
194                                                          "dm_dupLoopArray tmp");
195
196         if(tmp) dm->copyLoopArray(dm, tmp);
197
198         return tmp;
199 }
200
201 static MPoly *dm_dupPolyArray(DerivedMesh *dm)
202 {
203         MPoly *tmp = MEM_callocN(sizeof(*tmp) * dm->getNumPolys(dm),
204                                                          "dm_dupPolyArray tmp");
205
206         if(tmp) dm->copyPolyArray(dm, tmp);
207
208         return tmp;
209 }
210
211 static CustomData *dm_getVertCData(DerivedMesh *dm)
212 {
213         return &dm->vertData;
214 }
215
216 static CustomData *dm_getEdgeCData(DerivedMesh *dm)
217 {
218         return &dm->edgeData;
219 }
220
221 static CustomData *dm_getTessFaceCData(DerivedMesh *dm)
222 {
223         return &dm->faceData;
224 }
225
226 static CustomData *dm_getLoopCData(DerivedMesh *dm)
227 {
228         return &dm->loopData;
229 }
230
231 static CustomData *dm_getPolyCData(DerivedMesh *dm)
232 {
233         return &dm->polyData;
234 }
235
236 void DM_init_funcs(DerivedMesh *dm)
237 {
238         /* default function implementations */
239         dm->getVertArray = dm_getVertArray;
240         dm->getEdgeArray = dm_getEdgeArray;
241         dm->getTessFaceArray = dm_getTessFaceArray;
242         dm->getLoopArray = dm_getLoopArray;
243         dm->getPolyArray = dm_getPolyArray;
244         dm->dupVertArray = dm_dupVertArray;
245         dm->dupEdgeArray = dm_dupEdgeArray;
246         dm->dupTessFaceArray = dm_dupFaceArray;
247         dm->dupLoopArray = dm_dupLoopArray;
248         dm->dupPolyArray = dm_dupPolyArray;
249
250         dm->getVertDataLayout = dm_getVertCData;
251         dm->getEdgeDataLayout = dm_getEdgeCData;
252         dm->getTessFaceDataLayout = dm_getTessFaceCData;
253         dm->getLoopDataLayout = dm_getLoopCData;
254         dm->getPolyDataLayout = dm_getPolyCData;
255
256         dm->getVertData = DM_get_vert_data;
257         dm->getEdgeData = DM_get_edge_data;
258         dm->getTessFaceData = DM_get_tessface_data;
259         dm->getVertDataArray = DM_get_vert_data_layer;
260         dm->getEdgeDataArray = DM_get_edge_data_layer;
261         dm->getTessFaceDataArray = DM_get_tessface_data_layer;
262
263         bvhcache_init(&dm->bvhCache);
264 }
265
266 void DM_init(DerivedMesh *dm, DerivedMeshType type, int numVerts, int numEdges,
267              int numTessFaces, int numLoops, int numPolys)
268 {
269         dm->type = type;
270         dm->numVertData = numVerts;
271         dm->numEdgeData = numEdges;
272         dm->numTessFaceData = numTessFaces;
273         dm->numLoopData = numLoops;
274         dm->numPolyData = numPolys;
275
276         DM_init_funcs(dm);
277         
278         dm->needsFree = 1;
279         dm->auto_bump_scale = -1.0f;
280 }
281
282 void DM_from_template(DerivedMesh *dm, DerivedMesh *source, DerivedMeshType type,
283                       int numVerts, int numEdges, int numTessFaces,
284                       int numLoops, int numPolys)
285 {
286         CustomData_copy(&source->vertData, &dm->vertData, CD_MASK_DERIVEDMESH,
287                                         CD_CALLOC, numVerts);
288         CustomData_copy(&source->edgeData, &dm->edgeData, CD_MASK_DERIVEDMESH,
289                                         CD_CALLOC, numEdges);
290         CustomData_copy(&source->faceData, &dm->faceData, CD_MASK_DERIVEDMESH,
291                                         CD_CALLOC, numTessFaces);
292         CustomData_copy(&source->loopData, &dm->loopData, CD_MASK_DERIVEDMESH,
293                         CD_CALLOC, numLoops);
294         CustomData_copy(&source->polyData, &dm->polyData, CD_MASK_DERIVEDMESH,
295                         CD_CALLOC, numPolys);
296
297         dm->type = type;
298         dm->numVertData = numVerts;
299         dm->numEdgeData = numEdges;
300         dm->numTessFaceData = numTessFaces;
301         dm->numLoopData = numLoops;
302         dm->numPolyData = numPolys;
303
304         DM_init_funcs(dm);
305
306         dm->needsFree = 1;
307 }
308
309 int DM_release(DerivedMesh *dm)
310 {
311         if (dm->needsFree) {
312                 bvhcache_free(&dm->bvhCache);
313                 GPU_drawobject_free( dm );
314                 CustomData_free(&dm->vertData, dm->numVertData);
315                 CustomData_free(&dm->edgeData, dm->numEdgeData);
316                 CustomData_free(&dm->faceData, dm->numTessFaceData);
317                 CustomData_free(&dm->loopData, dm->numLoopData);
318                 CustomData_free(&dm->polyData, dm->numPolyData);
319
320                 return 1;
321         }
322         else {
323                 CustomData_free_temporary(&dm->vertData, dm->numVertData);
324                 CustomData_free_temporary(&dm->edgeData, dm->numEdgeData);
325                 CustomData_free_temporary(&dm->faceData, dm->numTessFaceData);
326                 CustomData_free_temporary(&dm->loopData, dm->numLoopData);
327                 CustomData_free_temporary(&dm->polyData, dm->numPolyData);
328
329                 return 0;
330         }
331 }
332
333 void DM_DupPolys(DerivedMesh *source, DerivedMesh *target)
334 {
335         CustomData_free(&target->loopData, source->numLoopData);
336         CustomData_free(&target->polyData, source->numPolyData);
337
338         CustomData_copy(&source->loopData, &target->loopData, CD_MASK_DERIVEDMESH, CD_DUPLICATE, source->numLoopData);
339         CustomData_copy(&source->polyData, &target->polyData, CD_MASK_DERIVEDMESH, CD_DUPLICATE, source->numPolyData);
340
341         target->numLoopData = source->numLoopData;
342         target->numPolyData = source->numPolyData;
343
344         if (!CustomData_has_layer(&target->polyData, CD_MPOLY)) {
345                 MPoly *mpoly;
346                 MLoop *mloop;
347
348                 mloop = source->dupLoopArray(source);
349                 mpoly = source->dupPolyArray(source);
350                 CustomData_add_layer(&target->loopData, CD_MLOOP, CD_ASSIGN, mloop, source->numLoopData);
351                 CustomData_add_layer(&target->polyData, CD_MPOLY, CD_ASSIGN, mpoly, source->numPolyData);
352         }
353 }
354
355 /* note: until all modifiers can take MPoly's as input,
356  * use this at the start of modifiers  */
357 void DM_ensure_tessface(DerivedMesh *dm)
358 {
359         const int numTessFaces = dm->getNumTessFaces(dm);
360         const int numPolys =     dm->getNumPolys(dm);
361
362         if ( (numTessFaces == 0) && (numPolys != 0)) {
363                 dm->recalcTesselation(dm);
364
365                 if (dm->getNumTessFaces(dm)) {
366                         printf("warning %s: could not create tessfaces from %d polygons, dm->type=%d\n",
367                                __func__, numPolys, dm->type);
368                 }
369                 else {
370                         printf("info %s: polys -> ngons calculated\n", __func__);
371                 }
372         }
373 }
374
375 void DM_to_mesh(DerivedMesh *dm, Mesh *me, Object *ob)
376 {
377         /* dm might depend on me, so we need to do everything with a local copy */
378         Mesh tmp = *me;
379         int totvert, totedge /*, totface */ /* UNUSED */, totloop, totpoly;
380         int did_shapekeys=0;
381         
382         memset(&tmp.vdata, 0, sizeof(tmp.vdata));
383         memset(&tmp.edata, 0, sizeof(tmp.edata));
384         memset(&tmp.fdata, 0, sizeof(tmp.fdata));
385         memset(&tmp.ldata, 0, sizeof(tmp.ldata));
386         memset(&tmp.pdata, 0, sizeof(tmp.pdata));
387
388         totvert = tmp.totvert = dm->getNumVerts(dm);
389         totedge = tmp.totedge = dm->getNumEdges(dm);
390         totloop = tmp.totloop = dm->getNumLoops(dm);
391         totpoly = tmp.totpoly = dm->getNumPolys(dm);
392
393         CustomData_copy(&dm->vertData, &tmp.vdata, CD_MASK_MESH, CD_DUPLICATE, totvert);
394         CustomData_copy(&dm->edgeData, &tmp.edata, CD_MASK_MESH, CD_DUPLICATE, totedge);
395         CustomData_copy(&dm->loopData, &tmp.ldata, CD_MASK_MESH, CD_DUPLICATE, totloop);
396         CustomData_copy(&dm->polyData, &tmp.pdata, CD_MASK_MESH, CD_DUPLICATE, totpoly);
397
398         if (CustomData_has_layer(&dm->vertData, CD_SHAPEKEY)) {
399                 KeyBlock *kb;
400                 int i=0;
401                 
402                 if (ob) {
403                         for (kb=me->key->block.first; kb; kb=kb->next, i++) {
404                                 if (i == ob->shapenr-1) {
405                                         i = kb->uid;
406                                         break;
407                                 }
408                         }
409                         
410                         if (!kb) {
411                                 printf("%s: error - could not find active shapekey %d!\n",
412                                        __func__, ob->shapenr-1);
413
414                                 i = INT_MAX;
415                         }
416                 } else {
417                         /*if no object, set to INT_MAX so we don't mess up any shapekey layers*/
418                         i = INT_MAX;
419                 }
420                 
421                 shapekey_layers_to_keyblocks(dm, me, i);
422                 did_shapekeys = 1;
423         }
424         
425         /* not all DerivedMeshes store their verts/edges/faces in CustomData, so
426            we set them here in case they are missing */
427         if(!CustomData_has_layer(&tmp.vdata, CD_MVERT))
428                 CustomData_add_layer(&tmp.vdata, CD_MVERT, CD_ASSIGN, dm->dupVertArray(dm), totvert);
429         if(!CustomData_has_layer(&tmp.edata, CD_MEDGE))
430                 CustomData_add_layer(&tmp.edata, CD_MEDGE, CD_ASSIGN, dm->dupEdgeArray(dm), totedge);
431         if(!CustomData_has_layer(&tmp.pdata, CD_MPOLY)) {
432                 tmp.mloop = dm->dupLoopArray(dm);
433                 tmp.mpoly = dm->dupPolyArray(dm);
434
435                 CustomData_add_layer(&tmp.ldata, CD_MLOOP, CD_ASSIGN, tmp.mloop, tmp.totloop);
436                 CustomData_add_layer(&tmp.pdata, CD_MPOLY, CD_ASSIGN, tmp.mpoly, tmp.totpoly);
437         }
438
439         /* object had got displacement layer, should copy this layer to save sculpted data */
440         /* NOTE: maybe some other layers should be copied? nazgul */
441         if(CustomData_has_layer(&me->ldata, CD_MDISPS)) {
442                 if (totloop == me->totloop) {
443                         MDisps *mdisps = CustomData_get_layer(&me->ldata, CD_MDISPS);
444                         CustomData_add_layer(&tmp.ldata, CD_MDISPS, CD_DUPLICATE, mdisps, totloop);
445                 }
446         }
447
448         /* yes, must be before _and_ after tesselate */
449         mesh_update_customdata_pointers(&tmp, TRUE);
450
451         tmp.totface = mesh_recalcTesselation(&tmp.fdata, &tmp.ldata, &tmp.pdata, tmp.mvert, tmp.totface, tmp.totloop, tmp.totpoly);
452
453         mesh_update_customdata_pointers(&tmp, TRUE);
454
455
456         CustomData_free(&me->vdata, me->totvert);
457         CustomData_free(&me->edata, me->totedge);
458         CustomData_free(&me->fdata, me->totface);
459         CustomData_free(&me->ldata, me->totloop);
460         CustomData_free(&me->pdata, me->totpoly);
461
462         /*  ok, this should now use new CD shapekey data,
463             which shouuld be fed through the modifier 
464                 stack*/
465         if(tmp.totvert != me->totvert && !did_shapekeys && me->key) {
466                 printf("YEEK! this should be recoded! Shape key loss!!!\n");
467                 if(tmp.key) tmp.key->id.us--;
468                 tmp.key = NULL;
469         }
470
471         *me = tmp;
472 }
473
474 void DM_to_meshkey(DerivedMesh *dm, Mesh *me, KeyBlock *kb)
475 {
476         int a, totvert = dm->getNumVerts(dm);
477         float *fp;
478         MVert *mvert;
479         
480         if(totvert==0 || me->totvert==0 || me->totvert!=totvert) return;
481         
482         if(kb->data) MEM_freeN(kb->data);
483         kb->data= MEM_callocN(me->key->elemsize*me->totvert, "kb->data");
484         kb->totelem= totvert;
485         
486         fp= kb->data;
487         mvert=dm->getVertDataArray(dm, CD_MVERT);
488         
489         for(a=0; a<kb->totelem; a++, fp+=3, mvert++) {
490                 copy_v3_v3(fp, mvert->co);
491         }
492 }
493
494 void DM_set_only_copy(DerivedMesh *dm, CustomDataMask mask)
495 {
496         CustomData_set_only_copy(&dm->vertData, mask);
497         CustomData_set_only_copy(&dm->edgeData, mask);
498         CustomData_set_only_copy(&dm->faceData, mask);
499 }
500
501 void DM_add_vert_layer(DerivedMesh *dm, int type, int alloctype, void *layer)
502 {
503         CustomData_add_layer(&dm->vertData, type, alloctype, layer, dm->numVertData);
504 }
505
506 void DM_add_edge_layer(DerivedMesh *dm, int type, int alloctype, void *layer)
507 {
508         CustomData_add_layer(&dm->edgeData, type, alloctype, layer, dm->numEdgeData);
509 }
510
511 void DM_add_tessface_layer(DerivedMesh *dm, int type, int alloctype, void *layer)
512 {
513         CustomData_add_layer(&dm->faceData, type, alloctype, layer, dm->numTessFaceData);
514 }
515
516 void DM_add_loop_layer(DerivedMesh *dm, int type, int alloctype, void *layer)
517 {
518         CustomData_add_layer(&dm->loopData, type, alloctype, layer, dm->numLoopData);
519 }
520
521 void DM_add_poly_layer(DerivedMesh *dm, int type, int alloctype, void *layer)
522 {
523         CustomData_add_layer(&dm->polyData, type, alloctype, layer, dm->numPolyData);
524 }
525
526 void *DM_get_vert_data(DerivedMesh *dm, int index, int type)
527 {
528         return CustomData_get(&dm->vertData, index, type);
529 }
530
531 void *DM_get_edge_data(DerivedMesh *dm, int index, int type)
532 {
533         return CustomData_get(&dm->edgeData, index, type);
534 }
535
536 void *DM_get_tessface_data(DerivedMesh *dm, int index, int type)
537 {
538         return CustomData_get(&dm->faceData, index, type);
539 }
540
541 void *DM_get_vert_data_layer(DerivedMesh *dm, int type)
542 {
543         if(type == CD_MVERT)
544                 return dm->getVertArray(dm);
545
546         return CustomData_get_layer(&dm->vertData, type);
547 }
548
549 void *DM_get_edge_data_layer(DerivedMesh *dm, int type)
550 {
551         if(type == CD_MEDGE)
552                 return dm->getEdgeArray(dm);
553
554         return CustomData_get_layer(&dm->edgeData, type);
555 }
556
557 void *DM_get_tessface_data_layer(DerivedMesh *dm, int type)
558 {
559         if (type == CD_MFACE)
560                 return dm->getTessFaceArray(dm);
561
562         return CustomData_get_layer(&dm->faceData, type);
563 }
564
565 void *DM_get_poly_data_layer(DerivedMesh *dm, int type)
566 {
567         return CustomData_get_layer(&dm->polyData, type);
568 }
569
570 void DM_set_vert_data(DerivedMesh *dm, int index, int type, void *data)
571 {
572         CustomData_set(&dm->vertData, index, type, data);
573 }
574
575 void DM_set_edge_data(DerivedMesh *dm, int index, int type, void *data)
576 {
577         CustomData_set(&dm->edgeData, index, type, data);
578 }
579
580 void DM_set_tessface_data(DerivedMesh *dm, int index, int type, void *data)
581 {
582         CustomData_set(&dm->faceData, index, type, data);
583 }
584
585 void DM_copy_vert_data(DerivedMesh *source, DerivedMesh *dest,
586                                            int source_index, int dest_index, int count)
587 {
588         CustomData_copy_data(&source->vertData, &dest->vertData,
589                                                  source_index, dest_index, count);
590 }
591
592 void DM_copy_edge_data(DerivedMesh *source, DerivedMesh *dest,
593                                            int source_index, int dest_index, int count)
594 {
595         CustomData_copy_data(&source->edgeData, &dest->edgeData,
596                                                  source_index, dest_index, count);
597 }
598
599 void DM_copy_tessface_data(DerivedMesh *source, DerivedMesh *dest,
600                                            int source_index, int dest_index, int count)
601 {
602         CustomData_copy_data(&source->faceData, &dest->faceData,
603                                                  source_index, dest_index, count);
604 }
605
606 void DM_copy_loop_data(DerivedMesh *source, DerivedMesh *dest,
607                        int source_index, int dest_index, int count)
608 {
609         CustomData_copy_data(&source->loopData, &dest->loopData,
610                              source_index, dest_index, count);
611 }
612
613 void DM_copy_poly_data(DerivedMesh *source, DerivedMesh *dest,
614                        int source_index, int dest_index, int count)
615 {
616         CustomData_copy_data(&source->polyData, &dest->polyData,
617                              source_index, dest_index, count);
618 }
619
620 void DM_free_vert_data(struct DerivedMesh *dm, int index, int count)
621 {
622         CustomData_free_elem(&dm->vertData, index, count);
623 }
624
625 void DM_free_edge_data(struct DerivedMesh *dm, int index, int count)
626 {
627         CustomData_free_elem(&dm->edgeData, index, count);
628 }
629
630 void DM_free_tessface_data(struct DerivedMesh *dm, int index, int count)
631 {
632         CustomData_free_elem(&dm->faceData, index, count);
633 }
634
635 void DM_free_loop_data(struct DerivedMesh *dm, int index, int count)
636 {
637         CustomData_free_elem(&dm->loopData, index, count);
638 }
639
640 void DM_free_poly_data(struct DerivedMesh *dm, int index, int count)
641 {
642         CustomData_free_elem(&dm->polyData, index, count);
643 }
644
645 void DM_interp_vert_data(DerivedMesh *source, DerivedMesh *dest,
646                                                  int *src_indices, float *weights,
647                                                  int count, int dest_index)
648 {
649         CustomData_interp(&source->vertData, &dest->vertData, src_indices,
650                                           weights, NULL, count, dest_index);
651 }
652
653 void DM_interp_edge_data(DerivedMesh *source, DerivedMesh *dest,
654                                                  int *src_indices,
655                                                  float *weights, EdgeVertWeight *vert_weights,
656                                                  int count, int dest_index)
657 {
658         CustomData_interp(&source->edgeData, &dest->edgeData, src_indices,
659                                           weights, (float*)vert_weights, count, dest_index);
660 }
661
662 void DM_interp_tessface_data(DerivedMesh *source, DerivedMesh *dest,
663                                                  int *src_indices,
664                                                  float *weights, FaceVertWeight *vert_weights,
665                                                  int count, int dest_index)
666 {
667         CustomData_interp(&source->faceData, &dest->faceData, src_indices,
668                                           weights, (float*)vert_weights, count, dest_index);
669 }
670
671 void DM_swap_tessface_data(DerivedMesh *dm, int index, const int *corner_indices)
672 {
673         CustomData_swap(&dm->faceData, index, corner_indices);
674 }
675
676 void DM_interp_loop_data(DerivedMesh *source, DerivedMesh *dest,
677                          int *src_indices,
678                          float *weights, int count, int dest_index)
679 {
680         CustomData_interp(&source->loopData, &dest->loopData, src_indices,
681                           weights, NULL, count, dest_index);
682 }
683
684 void DM_interp_poly_data(DerivedMesh *source, DerivedMesh *dest,
685                          int *src_indices,
686                          float *weights, int count, int dest_index)
687 {
688         CustomData_interp(&source->polyData, &dest->polyData, src_indices,
689                           weights, NULL, count, dest_index);
690 }
691
692 ///
693 DerivedMesh *mesh_create_derived(Mesh *me, Object *ob, float (*vertCos)[3])
694 {
695         DerivedMesh *dm = CDDM_from_mesh(me, ob);
696         
697         if(!dm)
698                 return NULL;
699         
700         if (vertCos)
701                 CDDM_apply_vert_coords(dm, vertCos);
702
703         CDDM_calc_normals_mapping(dm);
704
705         return dm;
706 }
707
708 /***/
709
710 DerivedMesh *mesh_create_derived_for_modifier(Scene *scene, Object *ob, 
711         ModifierData *md, int build_shapekey_layers)
712 {
713         Mesh *me = ob->data;
714         ModifierTypeInfo *mti = modifierType_getInfo(md->type);
715         DerivedMesh *dm;
716
717         md->scene= scene;
718         
719         if (!(md->mode&eModifierMode_Realtime)) return NULL;
720         if (mti->isDisabled && mti->isDisabled(md, 0)) return NULL;
721         
722         if (build_shapekey_layers && me->key && ob->shapenr <= BLI_countlist(&me->key->block)) {
723                 key_to_mesh(BLI_findlink(&me->key->block, ob->shapenr-1), me);
724         }
725         
726         if (mti->type==eModifierTypeType_OnlyDeform) {
727                 int numVerts;
728                 float (*deformedVerts)[3] = mesh_getVertexCos(me, &numVerts);
729
730                 mti->deformVerts(md, ob, NULL, deformedVerts, numVerts, 0, 0);
731                 dm = mesh_create_derived(me, ob, deformedVerts);
732
733                 if (build_shapekey_layers)
734                         add_shapekey_layers(dm, me, ob);
735                 
736                 MEM_freeN(deformedVerts);
737         } else {
738                 DerivedMesh *tdm = mesh_create_derived(me, ob, NULL);
739
740                 if (build_shapekey_layers)
741                         add_shapekey_layers(tdm, me, ob);
742                 
743                 dm = mti->applyModifier(md, ob, tdm, 0, 0);
744
745                 if(tdm != dm) tdm->release(tdm);
746         }
747
748         return dm;
749 }
750
751 static float *get_editbmesh_orco_verts(BMEditMesh *em)
752 {
753         BMIter iter;
754         BMVert *eve;
755         float *orco;
756         int a, totvert;
757
758         /* these may not really be the orco's, but it's only for preview.
759          * could be solver better once, but isn't simple */
760
761         totvert= em->bm->totvert;
762         
763         orco = MEM_mallocN(sizeof(float)*3*totvert, "EditMesh Orco");
764
765         eve = BMIter_New(&iter, em->bm, BM_VERTS_OF_MESH, NULL);
766         for (a=0; eve; eve=BMIter_Step(&iter), a+=3) {
767                 copy_v3_v3(orco+a, eve->co);
768         }
769         
770         return orco;
771 }
772
773 /* orco custom data layer */
774 static void *get_orco_coords_dm(Object *ob, BMEditMesh *em, int layer, int *free)
775 {
776         *free= 0;
777
778         if(layer == CD_ORCO) {
779                 /* get original coordinates */
780                 *free= 1;
781
782                 if(em)
783                         return (float(*)[3])get_editbmesh_orco_verts(em);
784                 else
785                         return (float(*)[3])get_mesh_orco_verts(ob);
786         }
787         else if(layer == CD_CLOTH_ORCO) {
788                 /* apply shape key for cloth, this should really be solved
789                    by a more flexible customdata system, but not simple */
790                 if(!em) {
791                         ClothModifierData *clmd = (ClothModifierData *)modifiers_findByType(ob, eModifierType_Cloth);
792                         KeyBlock *kb= key_get_keyblock(ob_get_key(ob), clmd->sim_parms->shapekey_rest);
793
794                         if(kb->data)
795                                 return kb->data;
796                 }
797
798                 return NULL;
799         }
800
801         return NULL;
802 }
803
804 static DerivedMesh *create_orco_dm(Object *ob, Mesh *me, BMEditMesh *em, int layer)
805 {
806         DerivedMesh *dm;
807         float (*orco)[3];
808         int free;
809
810         if(em) dm= CDDM_from_BMEditMesh(em, me, 0);
811         else dm= CDDM_from_mesh(me, ob);
812
813         orco= get_orco_coords_dm(ob, em, layer, &free);
814
815         if(orco) {
816                 CDDM_apply_vert_coords(dm, orco);
817                 if(free) MEM_freeN(orco);
818         }
819
820         CDDM_calc_normals_mapping(dm);
821
822         return dm;
823 }
824
825 static void add_orco_dm(Object *ob, BMEditMesh *em, DerivedMesh *dm,
826                                                 DerivedMesh *orcodm, int layer)
827 {
828         float (*orco)[3], (*layerorco)[3];
829         int totvert, free;
830
831         totvert= dm->getNumVerts(dm);
832
833         if(orcodm) {
834                 orco= MEM_callocN(sizeof(float)*3*totvert, "dm orco");
835                 free= 1;
836
837                 if(orcodm->getNumVerts(orcodm) == totvert)
838                         orcodm->getVertCos(orcodm, orco);
839                 else
840                         dm->getVertCos(dm, orco);
841         }
842         else
843                 orco= get_orco_coords_dm(ob, em, layer, &free);
844
845         if(orco) {
846                 if(layer == CD_ORCO)
847                         transform_mesh_orco_verts(ob->data, orco, totvert, 0);
848
849                 if(!(layerorco = DM_get_vert_data_layer(dm, layer))) {
850                         DM_add_vert_layer(dm, layer, CD_CALLOC, NULL);
851                         layerorco = DM_get_vert_data_layer(dm, layer);
852                 }
853
854                 memcpy(layerorco, orco, sizeof(float)*3*totvert);
855                 if(free) MEM_freeN(orco);
856         }
857 }
858
859 /* weight paint colors */
860
861 /* Something of a hack, at the moment deal with weightpaint
862  * by tucking into colors during modifier eval, only in
863  * wpaint mode. Works ok but need to make sure recalc
864  * happens on enter/exit wpaint.
865  */
866
867 void weight_to_rgb(float r_rgb[3], const float weight)
868 {
869         const float blend= ((weight/2.0f)+0.5f);
870
871         if (weight<=0.25f){     // blue->cyan
872                 r_rgb[0]= 0.0f;
873                 r_rgb[1]= blend*weight*4.0f;
874                 r_rgb[2]= blend;
875         }
876         else if (weight<=0.50f){        // cyan->green
877                 r_rgb[0]= 0.0f;
878                 r_rgb[1]= blend;
879                 r_rgb[2]= blend*(1.0f-((weight-0.25f)*4.0f));
880         }
881         else if (weight <= 0.75f){      // green->yellow
882                 r_rgb[0]= blend * ((weight-0.50f)*4.0f);
883                 r_rgb[1]= blend;
884                 r_rgb[2]= 0.0f;
885         }
886         else if (weight <= 1.0f){ // yellow->red
887                 r_rgb[0]= blend;
888                 r_rgb[1]= blend * (1.0f-((weight-0.75f)*4.0f));
889                 r_rgb[2]= 0.0f;
890         }
891         else {
892                 /* exceptional value, unclamped or nan,
893                  * avoid uninitialized memory use */
894                 r_rgb[0]= 1.0f;
895                 r_rgb[1]= 0.0f;
896                 r_rgb[2]= 1.0f;
897         }
898 }
899
900 /* draw_flag's for calc_weightpaint_vert_color */
901 enum {
902         CALC_WP_MULTIPAINT= (1<<0),
903         CALC_WP_AUTO_NORMALIZE= (1<<1)
904 };
905
906 static void weightpaint_color(unsigned char r_col[4], ColorBand *coba, const float input)
907 {
908         float colf[4];
909
910         if(coba) do_colorband(coba, input, colf);
911         else     weight_to_rgb(colf, input);
912
913         r_col[3] = (unsigned char)(colf[0] * 255.0f);
914         r_col[2] = (unsigned char)(colf[1] * 255.0f);
915         r_col[1] = (unsigned char)(colf[2] * 255.0f);
916         r_col[0] = 255;
917 }
918
919
920 static void calc_weightpaint_vert_color(
921         unsigned char r_col[4],
922         MDeformVert *dv, ColorBand *coba,
923         const int defbase_tot, const int defbase_act,
924         const char *dg_flags,
925         const int selected, const int draw_flag)
926 {
927         float input = 0.0f;
928         
929         int make_black= FALSE;
930
931         if ((selected > 1) && (draw_flag & CALC_WP_MULTIPAINT)) {
932                 int was_a_nonzero= FALSE;
933                 unsigned int i;
934
935                 MDeformWeight *dw= dv->dw;
936                 for (i = dv->totweight; i != 0; i--, dw++) {
937                         /* in multipaint, get the average if auto normalize is inactive
938                          * get the sum if it is active */
939                         if (dw->def_nr < defbase_tot) {
940                                 if (dg_flags[dw->def_nr]) {
941                                         if (dw->weight) {
942                                                 input += dw->weight;
943                                                 was_a_nonzero= TRUE;
944                                         }
945                                 }
946                         }
947                 }
948
949                 /* make it black if the selected groups have no weight on a vertex */
950                 if (was_a_nonzero == FALSE) {
951                         make_black = TRUE;
952                 }
953                 else if ((draw_flag & CALC_WP_AUTO_NORMALIZE) == FALSE) {
954                         input /= selected; /* get the average */
955                 }
956         }
957         else {
958                 /* default, non tricky behavior */
959                 input= defvert_find_weight(dv, defbase_act);
960         }
961
962         if (make_black) { /* TODO, theme color */
963                 r_col[3] = 0;
964                 r_col[2] = 0;
965                 r_col[1] = 0;
966                 r_col[0] = 255;
967         }
968         else {
969                 CLAMP(input, 0.0f, 1.0f);
970                 weightpaint_color(r_col, coba, input);
971         }
972 }
973
974 static ColorBand *stored_cb= NULL;
975
976 void vDM_ColorBand_store(ColorBand *coba)
977 {
978         stored_cb= coba;
979 }
980
981 /* return an array of vertex weight colors, caller must free.
982  *
983  * note that we could save some memory and allocate RGB only but then we'd need to
984  * re-arrange the colors when copying to the face since MCol has odd ordering,
985  * so leave this as is - campbell */
986 static unsigned char *calc_weightpaint_vert_array(Object *ob, int const draw_flag, ColorBand *coba)
987 {
988         Mesh *me = ob->data;
989         unsigned char *wtcol_v = MEM_mallocN (sizeof(unsigned char) * me->totvert * 4, "weightmap_v");
990
991         if (me->dvert) {
992                 unsigned char *wc = wtcol_v;
993                 MDeformVert *dv= me->dvert;
994                 unsigned int i;
995
996                 /* varisbles for multipaint */
997                 const int defbase_tot = BLI_countlist(&ob->defbase);
998                 const int defbase_act = ob->actdef-1;
999                 char *dg_flags = MEM_mallocN(defbase_tot * sizeof(char), __func__);
1000                 const int selected = get_selected_defgroups(ob, dg_flags, defbase_tot);
1001                 /* const int unselected = defbase_tot - selected; */ /* UNUSED */
1002
1003                 for (i = me->totvert; i != 0; i--, wc += 4, dv++) {
1004                         calc_weightpaint_vert_color(wc, dv, coba, defbase_tot, defbase_act, dg_flags, selected, draw_flag);
1005                 }
1006
1007                 MEM_freeN(dg_flags);
1008         }
1009         else {
1010                 int col_i;
1011                 weightpaint_color((unsigned char *)&col_i, coba, 0.0f);
1012                 fill_vn_i((int *)wtcol_v, me->totvert, col_i);
1013         }
1014
1015         return wtcol_v;
1016 }
1017
1018 static void add_weight_mcol_dm(Object *ob, DerivedMesh *dm, int const draw_flag)
1019 {
1020         ColorBand *coba= stored_cb;     /* warning, not a local var */
1021         unsigned char *wtcol_v = calc_weightpaint_vert_array(ob, draw_flag, coba);
1022         unsigned char *wtcol_f;
1023         unsigned char(*wtcol_l)[4] = NULL;
1024         BLI_array_declare(wtcol_l);
1025         MFace *mf = dm->getTessFaceArray(dm);
1026         MLoop *mloop = dm->getLoopArray(dm), *ml;
1027         MPoly *mp = dm->getPolyArray(dm);
1028         int i, j, totface=dm->getNumTessFaces(dm), totloop;
1029         int *origIndex = dm->getVertDataArray(dm, CD_ORIGINDEX);
1030         unsigned char *wtcol_f_step = wtcol_f;
1031
1032         wtcol_f = MEM_mallocN(sizeof (unsigned char) * totface*4*4, "weightmap_f");
1033
1034         /*first add colors to the tesselation faces*/
1035         for (i=0; i<totface; i++, mf++, wtcol_f_step += (4 * 4)) {
1036                 /*origindex being NULL means we're operating on original mesh data*/
1037 #if 0
1038                 unsigned int fidx= mf->v4 ? 3:2;
1039
1040 #else   /* better zero out triangles 4th component. else valgrind complains when the buffer's copied */
1041                 unsigned int fidx;
1042                 if (mf->v4) {
1043                         fidx = 3;
1044                 }
1045                 else {
1046                         fidx = 2;
1047                         *(int *)(&wtcol_f_step[3 * 4]) = 0;
1048                 }
1049 #endif
1050
1051                 do {
1052                         copy_v4_v4_char((char *)&wtcol_f_step[fidx * 4],
1053                                         (char *)&wtcol_v[4 * (*(&mf->v1 + fidx))]);
1054                 } while (fidx--);
1055         }
1056
1057         CustomData_add_layer(&dm->faceData, CD_WEIGHT_MCOL, CD_ASSIGN, wtcol_f, totface);
1058
1059         /*now add to loops, so the data can be passed through the modifier stack*/
1060         totloop = 0;
1061         for (i=0; i<dm->numPolyData; i++, mp++) {
1062                 ml = mloop + mp->loopstart;
1063
1064                 for (j=0; j<mp->totloop; j++, ml++, totloop++) {
1065                         BLI_array_growone(wtcol_l);
1066                         copy_v4_v4_char((char *)&wtcol_l[totloop],
1067                                         (char *)&wtcol_v[4 * (origIndex ? origIndex[ml->v] : ml->v)]);
1068                 }
1069         }
1070
1071         MEM_freeN(wtcol_v);
1072
1073         CustomData_add_layer(&dm->loopData, CD_WEIGHT_MLOOPCOL, CD_ASSIGN, wtcol_l, totloop);
1074 }
1075
1076
1077 static void shapekey_layers_to_keyblocks(DerivedMesh *dm, Mesh *me, int actshape_uid)
1078 {
1079         KeyBlock *kb;
1080         int i, j, tot;
1081         
1082         if (!me->key)
1083                 return; 
1084         
1085         tot = CustomData_number_of_layers(&dm->vertData, CD_SHAPEKEY);
1086         for (i=0; i<tot; i++) {
1087                 CustomDataLayer *layer = &dm->vertData.layers[CustomData_get_layer_index_n(&dm->vertData, CD_SHAPEKEY, i)];
1088                 float (*cos)[3], (*kbcos)[3];
1089                 
1090                 for (kb=me->key->block.first; kb; kb=kb->next) {
1091                         if (kb->uid == layer->uid)
1092                                 break;
1093                 }
1094                 
1095                 if (!kb) {
1096                         kb = add_keyblock(me->key, layer->name);
1097                         kb->uid = layer->uid;
1098                 }
1099                 
1100                 if (kb->data)
1101                         MEM_freeN(kb->data);
1102                 
1103                 cos = CustomData_get_layer_n(&dm->vertData, CD_SHAPEKEY, i);
1104                 kb->totelem = dm->numVertData;
1105
1106                 kb->data = kbcos = MEM_mallocN(sizeof(float)*3*kb->totelem, "kbcos DerivedMesh.c");
1107                 if (kb->uid == actshape_uid) {
1108                         MVert *mvert = dm->getVertArray(dm);
1109                         
1110                         for (j=0; j<dm->numVertData; j++, kbcos++, mvert++) {
1111                                 copy_v3_v3(*kbcos, mvert->co);
1112                         }
1113                 } else {
1114                         for (j=0; j<kb->totelem; j++, cos++, kbcos++) {
1115                                 copy_v3_v3(*kbcos, *cos);
1116                         }
1117                 }
1118         }
1119         
1120         for (kb=me->key->block.first; kb; kb=kb->next) {
1121                 if (kb->totelem != dm->numVertData) {
1122                         if (kb->data)
1123                                 MEM_freeN(kb->data);
1124                         
1125                         kb->totelem = dm->numVertData;
1126                         kb->data = MEM_callocN(sizeof(float)*3*kb->totelem, "kb->data derivedmesh.c");
1127                         fprintf(stderr, "%s: lost a shapekey layer! (bmesh internal error)\n", __func__);
1128                 }
1129         }
1130 }
1131
1132 static void add_shapekey_layers(DerivedMesh *dm, Mesh *me, Object *UNUSED(ob))
1133 {
1134         KeyBlock *kb;
1135         Key *key = me->key;
1136         int a, b;
1137         
1138         if (!me->key)
1139                 return;
1140         
1141         if (dm->numVertData != me->totvert) {
1142                 printf("error in add_shapekey_layers: dm isn't the same size as me\n");
1143                 return;
1144         }
1145                 
1146         for (a=0, kb=key->block.first; kb; kb=kb->next, a++) {
1147                 float (*cos)[3] = CustomData_add_layer_named(&dm->vertData, CD_SHAPEKEY, CD_CALLOC, NULL, dm->numVertData, kb->name);
1148                 int ci = CustomData_get_layer_index_n(&dm->vertData, CD_SHAPEKEY, a);
1149                 
1150                 dm->vertData.layers[ci].uid = kb->uid;
1151                 if (kb->totelem != dm->numVertData) {
1152                         printf("error in add_shapekey_layers: totelem and totvert don't match");
1153                         continue;
1154                 }
1155                 
1156                 for (b=0; b<kb->totelem; b++, cos++) {
1157                         copy_v3_v3((float *)cos, ((float*)kb->data)+b*3);
1158                 }
1159         }
1160 }
1161
1162 /* new value for useDeform -1  (hack for the gameengine):
1163  * - apply only the modifier stack of the object, skipping the virtual modifiers,
1164  * - don't apply the key
1165  * - apply deform modifiers and input vertexco
1166  */
1167 static void mesh_calc_modifiers(Scene *scene, Object *ob, float (*inputVertexCos)[3],
1168                                                                 DerivedMesh **deform_r, DerivedMesh **final_r,
1169                                                                 int useRenderParams, int useDeform,
1170                                                                 int needMapping, CustomDataMask dataMask, 
1171                                                                 int index, int useCache, int build_shapekey_layers)
1172 {
1173         Mesh *me = ob->data;
1174         ModifierData *firstmd, *md;
1175         LinkNode *datamasks, *curr;
1176         CustomDataMask mask, nextmask, append_mask = 0;
1177         float (*deformedVerts)[3] = NULL;
1178         DerivedMesh *dm=NULL, *orcodm, *clothorcodm, *finaldm;
1179         int numVerts = me->totvert;
1180         int required_mode;
1181         int isPrevDeform= FALSE;
1182         int skipVirtualArmature = (useDeform < 0);
1183         MultiresModifierData *mmd= get_multires_modifier(scene, ob, 0);
1184         int has_multires = mmd != NULL, multires_applied = 0;
1185         int sculpt_mode = ob->mode & OB_MODE_SCULPT && ob->sculpt;
1186
1187         int draw_flag= ((scene->toolsettings->multipaint ? CALC_WP_MULTIPAINT : 0) |
1188                         (scene->toolsettings->auto_normalize ? CALC_WP_AUTO_NORMALIZE : 0));
1189
1190         if(mmd && !mmd->sculptlvl)
1191                 has_multires = 0;
1192
1193         if(!skipVirtualArmature) {
1194                 firstmd = modifiers_getVirtualModifierList(ob);
1195         }
1196         else {
1197                 /* game engine exception */
1198                 firstmd = ob->modifiers.first;
1199                 if(firstmd && firstmd->type == eModifierType_Armature)
1200                         firstmd = firstmd->next;
1201         }
1202
1203         md = firstmd;
1204
1205         modifiers_clearErrors(ob);
1206
1207         if(useRenderParams) required_mode = eModifierMode_Render;
1208         else required_mode = eModifierMode_Realtime;
1209
1210         datamasks = modifiers_calcDataMasks(scene, ob, md, dataMask, required_mode);
1211         curr = datamasks;
1212
1213         if(deform_r) *deform_r = NULL;
1214         *final_r = NULL;
1215
1216         if(useDeform) {
1217                 if(inputVertexCos)
1218                         deformedVerts = inputVertexCos;
1219                 
1220                 /* Apply all leading deforming modifiers */
1221                 for(;md; md = md->next, curr = curr->next) {
1222                         ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1223
1224                         md->scene= scene;
1225                         
1226                         if(!modifier_isEnabled(scene, md, required_mode)) continue;
1227                         if(useDeform < 0 && mti->dependsOnTime && mti->dependsOnTime(md)) continue;
1228
1229                         if(mti->type == eModifierTypeType_OnlyDeform) {
1230                                 if(!deformedVerts)
1231                                         deformedVerts = mesh_getVertexCos(me, &numVerts);
1232
1233                                 mti->deformVerts(md, ob, NULL, deformedVerts, numVerts, useRenderParams, useDeform);
1234                         } else {
1235                                 break;
1236                         }
1237                         
1238                         /* grab modifiers until index i */
1239                         if((index >= 0) && (modifiers_indexInObject(ob, md) >= index))
1240                                 break;
1241                 }
1242
1243                 /* Result of all leading deforming modifiers is cached for
1244                  * places that wish to use the original mesh but with deformed
1245                  * coordinates (vpaint, etc.)
1246                  */
1247                 if (deform_r) {
1248                         *deform_r = CDDM_from_mesh(me, ob);
1249                          
1250                         if (build_shapekey_layers)
1251                                 add_shapekey_layers(dm, me, ob);
1252                         
1253                         if(deformedVerts) {
1254                                 CDDM_apply_vert_coords(*deform_r, deformedVerts);
1255                                 CDDM_calc_normals_mapping(*deform_r);
1256                         }
1257                 }
1258         } else {
1259                 /* default behaviour for meshes */
1260                 if(inputVertexCos)
1261                         deformedVerts = inputVertexCos;
1262                 else
1263                         deformedVerts = mesh_getVertexCos(me, &numVerts);
1264         }
1265
1266
1267         /* Now apply all remaining modifiers. If useDeform is off then skip
1268          * OnlyDeform ones. 
1269          */
1270         dm = NULL;
1271         orcodm = NULL;
1272         clothorcodm = NULL;
1273
1274         for(;md; md = md->next, curr = curr->next) {
1275                 ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1276
1277                 md->scene= scene;
1278
1279                 if(!modifier_isEnabled(scene, md, required_mode)) continue;
1280                 if(mti->type == eModifierTypeType_OnlyDeform && !useDeform) continue;
1281                 if((mti->flags & eModifierTypeFlag_RequiresOriginalData) && dm) {
1282                         modifier_setError(md, "Modifier requires original data, bad stack position.");
1283                         continue;
1284                 }
1285                 if(sculpt_mode && (!has_multires || multires_applied)) {
1286                         int unsupported= 0;
1287
1288                         if(scene->toolsettings->sculpt->flags & SCULPT_ONLY_DEFORM)
1289                                 unsupported|= mti->type != eModifierTypeType_OnlyDeform;
1290
1291                         unsupported|= md->type == eModifierType_Multires && ((MultiresModifierData*)md)->sculptlvl==0;
1292                         unsupported|= multires_applied;
1293
1294                         if(unsupported) {
1295                                 modifier_setError(md, "Not supported in sculpt mode.");
1296                                 continue;
1297                         }
1298                 }
1299                 if(needMapping && !modifier_supportsMapping(md)) continue;
1300                 if(useDeform < 0 && mti->dependsOnTime && mti->dependsOnTime(md)) continue;
1301
1302                 /* add an orco layer if needed by this modifier */
1303                 if(mti->requiredDataMask)
1304                         mask = mti->requiredDataMask(ob, md);
1305                 else
1306                         mask = 0;
1307
1308                 if(dm && (mask & CD_MASK_ORCO))
1309                         add_orco_dm(ob, NULL, dm, orcodm, CD_ORCO);
1310
1311                 /* How to apply modifier depends on (a) what we already have as
1312                  * a result of previous modifiers (could be a DerivedMesh or just
1313                  * deformed vertices) and (b) what type the modifier is.
1314                  */
1315
1316                 if(mti->type == eModifierTypeType_OnlyDeform) {
1317                         /* No existing verts to deform, need to build them. */
1318                         if(!deformedVerts) {
1319                                 if(dm) {
1320                                         /* Deforming a derived mesh, read the vertex locations
1321                                          * out of the mesh and deform them. Once done with this
1322                                          * run of deformers verts will be written back.
1323                                          */
1324                                         numVerts = dm->getNumVerts(dm);
1325                                         deformedVerts =
1326                                                 MEM_mallocN(sizeof(*deformedVerts) * numVerts, "dfmv");
1327                                         dm->getVertCos(dm, deformedVerts);
1328                                 } else {
1329                                         deformedVerts = mesh_getVertexCos(me, &numVerts);
1330                                 }
1331                         }
1332
1333                         /* if this is not the last modifier in the stack then recalculate the normals
1334                          * to avoid giving bogus normals to the next modifier see: [#23673] */
1335                         if(isPrevDeform &&  mti->dependsOnNormals && mti->dependsOnNormals(md)) {
1336                                 /* XXX, this covers bug #23673, but we may need normal calc for other types */
1337                                 if(dm && dm->type == DM_TYPE_CDDM) {
1338                                         CDDM_apply_vert_coords(dm, deformedVerts);
1339                                         CDDM_calc_normals_mapping(dm);
1340                                 }
1341                         }
1342
1343                         mti->deformVerts(md, ob, dm, deformedVerts, numVerts, useRenderParams, useDeform);
1344                 } else {
1345                         DerivedMesh *ndm;
1346
1347                         /* determine which data layers are needed by following modifiers */
1348                         if(curr->next)
1349                                 nextmask= (CustomDataMask)GET_INT_FROM_POINTER(curr->next->link);
1350                         else
1351                                 nextmask= dataMask;
1352
1353                         /* apply vertex coordinates or build a DerivedMesh as necessary */
1354                         if(dm) {
1355                                 if(deformedVerts) {
1356                                         DerivedMesh *tdm = CDDM_copy(dm, 0);
1357                                         dm->release(dm);
1358                                         dm = tdm;
1359
1360                                         CDDM_apply_vert_coords(dm, deformedVerts);
1361                                         CDDM_calc_normals_mapping(dm);
1362                                 }
1363                         } else {
1364                                 dm = CDDM_from_mesh(me, ob);
1365
1366                                 if (build_shapekey_layers)
1367                                         add_shapekey_layers(dm, me, ob);
1368
1369                                 if(deformedVerts) {
1370                                         CDDM_apply_vert_coords(dm, deformedVerts);
1371                                         CDDM_calc_normals_mapping(dm);
1372                                 }
1373
1374                                 /* Constructive modifiers need to have an origindex
1375                                  * otherwise they wont have anywhere to copy the data from.
1376                                  *
1377                                  * Also create ORIGINDEX data if any of the following modifiers
1378                                  * requests it, this way Mirror, Solidify etc will keep ORIGINDEX
1379                                  * data by using generic DM_copy_vert_data() functions.
1380                                  */
1381                                 if(needMapping || (nextmask & CD_MASK_ORIGINDEX)) {
1382                                         /* calc */
1383                                         DM_add_vert_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
1384                                         DM_add_edge_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
1385                                         DM_add_poly_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
1386
1387                                         range_vn_i(DM_get_vert_data_layer(dm, CD_ORIGINDEX), dm->numVertData, 0);
1388                                         range_vn_i(DM_get_edge_data_layer(dm, CD_ORIGINDEX), dm->numEdgeData, 0);
1389                                         range_vn_i(DM_get_poly_data_layer(dm, CD_ORIGINDEX), dm->numPolyData, 0);
1390                                 }
1391
1392                                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
1393                                         add_weight_mcol_dm(ob, dm, draw_flag);
1394
1395                         }
1396
1397                         
1398                         /* set the DerivedMesh to only copy needed data */
1399                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link);
1400                         /* needMapping check here fixes bug [#28112], otherwise its
1401                          * possible that it wont be copied */
1402                         mask |= append_mask;
1403                         DM_set_only_copy(dm, mask | (needMapping ? CD_MASK_ORIGINDEX : 0));
1404                         
1405                         /* add cloth rest shape key if need */
1406                         if(mask & CD_MASK_CLOTH_ORCO)
1407                                 add_orco_dm(ob, NULL, dm, clothorcodm, CD_CLOTH_ORCO);
1408
1409                         /* add an origspace layer if needed */
1410                         if(((CustomDataMask)GET_INT_FROM_POINTER(curr->link)) & CD_MASK_ORIGSPACE)
1411                                 if(!CustomData_has_layer(&dm->faceData, CD_ORIGSPACE))
1412                                         DM_add_tessface_layer(dm, CD_ORIGSPACE, CD_DEFAULT, NULL);
1413
1414                         ndm = mti->applyModifier(md, ob, dm, useRenderParams, useCache);
1415
1416                         if(ndm) {
1417                                 /* if the modifier returned a new dm, release the old one */
1418                                 if(dm && dm != ndm) dm->release(dm);
1419
1420                                 dm = ndm;
1421
1422                                 if(deformedVerts) {
1423                                         if(deformedVerts != inputVertexCos)
1424                                                 MEM_freeN(deformedVerts);
1425
1426                                         deformedVerts = NULL;
1427                                 }
1428                         } 
1429
1430                         /* create an orco derivedmesh in parallel */
1431                         if(nextmask & CD_MASK_ORCO) {
1432                                 if(!orcodm)
1433                                         orcodm= create_orco_dm(ob, me, NULL, CD_ORCO);
1434
1435                                 nextmask &= ~CD_MASK_ORCO;
1436                                 DM_set_only_copy(orcodm, nextmask | CD_MASK_ORIGINDEX);
1437                                 ndm = mti->applyModifier(md, ob, orcodm, useRenderParams, 0);
1438
1439                                 if(ndm) {
1440                                         /* if the modifier returned a new dm, release the old one */
1441                                         if(orcodm && orcodm != ndm) orcodm->release(orcodm);
1442                                         orcodm = ndm;
1443                                 }
1444                         }
1445
1446                         /* create cloth orco derivedmesh in parallel */
1447                         if(nextmask & CD_MASK_CLOTH_ORCO) {
1448                                 if(!clothorcodm)
1449                                         clothorcodm= create_orco_dm(ob, me, NULL, CD_CLOTH_ORCO);
1450
1451                                 nextmask &= ~CD_MASK_CLOTH_ORCO;
1452                                 DM_set_only_copy(clothorcodm, nextmask | CD_MASK_ORIGINDEX);
1453                                 ndm = mti->applyModifier(md, ob, clothorcodm, useRenderParams, 0);
1454
1455                                 if(ndm) {
1456                                         /* if the modifier returned a new dm, release the old one */
1457                                         if(clothorcodm && clothorcodm != ndm) clothorcodm->release(clothorcodm);
1458                                         clothorcodm = ndm;
1459                                 }
1460                         }
1461
1462                         /* in case of dynamic paint, make sure preview mask remains for following modifiers */
1463                         if (md->type == eModifierType_DynamicPaint)
1464                                 append_mask |= CD_MASK_WEIGHT_MCOL;
1465                 }
1466
1467                 isPrevDeform= (mti->type == eModifierTypeType_OnlyDeform);
1468
1469                 /* grab modifiers until index i */
1470                 if((index >= 0) && (modifiers_indexInObject(ob, md) >= index))
1471                         break;
1472
1473                 if(sculpt_mode && md->type == eModifierType_Multires)
1474                         multires_applied = 1;
1475         }
1476
1477         for(md=firstmd; md; md=md->next)
1478                 modifier_freeTemporaryData(md);
1479
1480         /* Yay, we are done. If we have a DerivedMesh and deformed vertices
1481          * need to apply these back onto the DerivedMesh. If we have no
1482          * DerivedMesh then we need to build one.
1483          */
1484         if(dm && deformedVerts) {
1485                 finaldm = CDDM_copy(dm, 0);
1486
1487                 dm->release(dm);
1488
1489                 CDDM_apply_vert_coords(finaldm, deformedVerts);
1490                 CDDM_calc_normals_mapping(finaldm);
1491
1492                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
1493                         add_weight_mcol_dm(ob, finaldm, draw_flag);
1494         } else if(dm) {
1495                 finaldm = dm;
1496         } else {
1497                 int recalc_normals= 0;
1498
1499                 finaldm = CDDM_from_mesh(me, ob);
1500                 
1501                 if(build_shapekey_layers) {
1502                         add_shapekey_layers(finaldm, me, ob);
1503                         recalc_normals= 1;
1504                 }
1505                 
1506                 if(deformedVerts) {
1507                         CDDM_apply_vert_coords(finaldm, deformedVerts);
1508                         recalc_normals= 1;
1509                 }
1510
1511                 if(recalc_normals)
1512                         CDDM_calc_normals_mapping(finaldm);
1513                 
1514                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
1515                         add_weight_mcol_dm(ob, finaldm, draw_flag);
1516         }
1517
1518         /* add an orco layer if needed */
1519         if(dataMask & CD_MASK_ORCO) {
1520                 add_orco_dm(ob, NULL, finaldm, orcodm, CD_ORCO);
1521
1522                 if(deform_r && *deform_r)
1523                         add_orco_dm(ob, NULL, *deform_r, NULL, CD_ORCO);
1524         }
1525
1526 #ifdef WITH_GAMEENGINE
1527         /* NavMesh - this is a hack but saves having a NavMesh modifier */
1528         if ((ob->gameflag & OB_NAVMESH) && (finaldm->type == DM_TYPE_CDDM)) {
1529                 DerivedMesh *tdm;
1530                 tdm= navmesh_dm_createNavMeshForVisualization(finaldm);
1531                 if (finaldm != tdm) {
1532                         finaldm->release(finaldm);
1533                         finaldm= tdm;
1534                 }
1535         }
1536 #endif /* WITH_GAMEENGINE */
1537
1538
1539         /* --------------------------------------------------------------------- */
1540         /* Re-tesselation is necessary to push render data (uvs, textures, colors)
1541          * from loops and polys onto the tessfaces. This may be currently be
1542          * redundantin cases where the render mode doesn't use these inputs, but
1543          * ideally eventually tesselation would happen on-demand, and this is one
1544          * of the primary places it would be needed. */
1545         finaldm->recalcTesselation(finaldm);
1546         /* if we have no modifiers applied we'lll still want the tessface normals
1547          * to be calculated from the polygon noramals,
1548          * 'CDDM_calc_normals_mapping' checks for this case - campbell */
1549         finaldm->calcNormals(finaldm);
1550         /* Need to watch this, it can cause issues, see bug [#29338]             */
1551         /* take care with this block, we really need testing frameworks          */
1552         /* --------------------------------------------------------------------- */
1553
1554
1555         *final_r = finaldm;
1556
1557         if(orcodm)
1558                 orcodm->release(orcodm);
1559         if(clothorcodm)
1560                 clothorcodm->release(clothorcodm);
1561
1562         if(deformedVerts && deformedVerts != inputVertexCos)
1563                 MEM_freeN(deformedVerts);
1564
1565         BLI_linklist_free(datamasks, NULL);
1566 }
1567
1568 float (*editbmesh_get_vertex_cos(BMEditMesh *em, int *numVerts_r))[3]
1569 {
1570         int i, numVerts = *numVerts_r = em->bm->totvert;
1571         float (*cos)[3];
1572         BMIter iter;
1573         BMVert *eve;
1574
1575         cos = MEM_mallocN(sizeof(float)*3*numVerts, "vertexcos");
1576
1577         eve = BMIter_New(&iter, em->bm, BM_VERTS_OF_MESH, NULL);
1578         for (i=0; eve; eve=BMIter_Step(&iter), i++) {
1579                 copy_v3_v3(cos[i], eve->co);
1580         }
1581
1582         return cos;
1583 }
1584
1585 int editbmesh_modifier_is_enabled(Scene *scene, ModifierData *md, DerivedMesh *dm)
1586 {
1587         ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1588         int required_mode = eModifierMode_Realtime | eModifierMode_Editmode;
1589
1590         if(!modifier_isEnabled(scene, md, required_mode)) return 0;
1591         if((mti->flags & eModifierTypeFlag_RequiresOriginalData) && dm) {
1592                 modifier_setError(md, "Modifier requires original data, bad stack position.");
1593                 return 0;
1594         }
1595         
1596         return 1;
1597 }
1598
1599 static void editbmesh_calc_modifiers(Scene *scene, Object *ob, BMEditMesh *em, DerivedMesh **cage_r,
1600                                                                         DerivedMesh **final_r,
1601                                                                         CustomDataMask dataMask)
1602 {
1603         ModifierData *md;
1604         float (*deformedVerts)[3] = NULL;
1605         CustomDataMask mask;
1606         DerivedMesh *dm, *orcodm = NULL;
1607         int i, numVerts = 0, cageIndex = modifiers_getCageIndex(scene, ob, NULL, 1);
1608         LinkNode *datamasks, *curr;
1609         int required_mode = eModifierMode_Realtime | eModifierMode_Editmode;
1610
1611         modifiers_clearErrors(ob);
1612
1613         if(cage_r && cageIndex == -1) {
1614                 *cage_r = getEditDerivedBMesh(em, ob, NULL);
1615         }
1616
1617         dm = NULL;
1618         md = modifiers_getVirtualModifierList(ob);
1619
1620         datamasks = modifiers_calcDataMasks(scene, ob, md, dataMask, required_mode);
1621
1622         curr = datamasks;
1623         for(i = 0; md; i++, md = md->next, curr = curr->next) {
1624                 ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1625
1626                 md->scene= scene;
1627                 
1628                 if(!editbmesh_modifier_is_enabled(scene, md, dm))
1629                         continue;
1630
1631                 /* add an orco layer if needed by this modifier */
1632                 if(dm && mti->requiredDataMask) {
1633                         mask = mti->requiredDataMask(ob, md);
1634                         if(mask & CD_MASK_ORCO)
1635                                 add_orco_dm(ob, em, dm, orcodm, CD_ORCO);
1636                 }
1637
1638                 /* How to apply modifier depends on (a) what we already have as
1639                  * a result of previous modifiers (could be a DerivedMesh or just
1640                  * deformed vertices) and (b) what type the modifier is.
1641                  */
1642
1643                 if(mti->type == eModifierTypeType_OnlyDeform) {
1644                         /* No existing verts to deform, need to build them. */
1645                         if(!deformedVerts) {
1646                                 if(dm) {
1647                                         /* Deforming a derived mesh, read the vertex locations
1648                                          * out of the mesh and deform them. Once done with this
1649                                          * run of deformers verts will be written back.
1650                                          */
1651                                         numVerts = dm->getNumVerts(dm);
1652                                         deformedVerts =
1653                                                 MEM_mallocN(sizeof(*deformedVerts) * numVerts, "dfmv");
1654                                         dm->getVertCos(dm, deformedVerts);
1655                                 } else {
1656                                         deformedVerts = editbmesh_get_vertex_cos(em, &numVerts);
1657                                 }
1658                         }
1659
1660                         if (mti->deformVertsEM)
1661                                 mti->deformVertsEM(md, ob, em, dm, deformedVerts, numVerts);
1662                         else mti->deformVerts(md, ob, dm, deformedVerts, numVerts, 0, 0);
1663                 } else {
1664                         DerivedMesh *ndm;
1665
1666                         /* apply vertex coordinates or build a DerivedMesh as necessary */
1667                         if(dm) {
1668                                 if(deformedVerts) {
1669                                         DerivedMesh *tdm = CDDM_copy(dm, 0);
1670                                         if(!(cage_r && dm == *cage_r)) dm->release(dm);
1671                                         dm = tdm;
1672
1673                                         CDDM_apply_vert_coords(dm, deformedVerts);
1674                                         CDDM_calc_normals_mapping(dm);
1675                                 } else if(cage_r && dm == *cage_r) {
1676                                         /* dm may be changed by this modifier, so we need to copy it
1677                                          */
1678                                         dm = CDDM_copy(dm, 0);
1679                                 }
1680
1681                         } else {
1682                                 dm = CDDM_from_BMEditMesh(em, ob->data, 0);
1683
1684                                 if(deformedVerts) {
1685                                         CDDM_apply_vert_coords(dm, deformedVerts);
1686                                         CDDM_calc_normals_mapping(dm);
1687                                 }
1688                         }
1689
1690                         /* create an orco derivedmesh in parallel */
1691                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link);
1692                         if(mask & CD_MASK_ORCO) {
1693                                 if(!orcodm)
1694                                         orcodm= create_orco_dm(ob, ob->data, em, CD_ORCO);
1695
1696                                 mask &= ~CD_MASK_ORCO;
1697                                 DM_set_only_copy(orcodm, mask | CD_MASK_ORIGINDEX);
1698
1699                                 if (mti->applyModifierEM)
1700                                         ndm = mti->applyModifierEM(md, ob, em, orcodm);
1701                                 else
1702                                         ndm = mti->applyModifier(md, ob, orcodm, 0, 0);
1703
1704                                 if(ndm) {
1705                                         /* if the modifier returned a new dm, release the old one */
1706                                         if(orcodm && orcodm != ndm) orcodm->release(orcodm);
1707                                         orcodm = ndm;
1708                                 }
1709                         }
1710
1711                         /* set the DerivedMesh to only copy needed data */
1712                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link); /* CD_MASK_ORCO may have been cleared above */
1713
1714                         DM_set_only_copy(dm, mask | CD_MASK_ORIGINDEX);
1715
1716                         if(mask & CD_MASK_ORIGSPACE)
1717                                 if(!CustomData_has_layer(&dm->faceData, CD_ORIGSPACE))
1718                                         DM_add_tessface_layer(dm, CD_ORIGSPACE, CD_DEFAULT, NULL);
1719                         
1720                         if (mti->applyModifierEM)
1721                                 ndm = mti->applyModifierEM(md, ob, em, dm);
1722                         else
1723                                 ndm = mti->applyModifier(md, ob, dm, 0, 0);
1724
1725                         if (ndm) {
1726                                 if(dm && dm != ndm)
1727                                         dm->release(dm);
1728
1729                                 dm = ndm;
1730
1731                                 if (deformedVerts) {
1732                                         MEM_freeN(deformedVerts);
1733                                         deformedVerts = NULL;
1734                                 }
1735                         }
1736                 }
1737
1738                 if(cage_r && i == cageIndex) {
1739                         if(dm && deformedVerts) {
1740                                 *cage_r = CDDM_copy(dm, 0);
1741                                 CDDM_apply_vert_coords(*cage_r, deformedVerts);
1742                         } else if(dm) {
1743                                 *cage_r = dm;
1744                         } else {
1745                                 *cage_r =
1746                                         getEditDerivedBMesh(em, ob,
1747                                                 deformedVerts ? MEM_dupallocN(deformedVerts) : NULL);
1748                         }
1749                 }
1750         }
1751
1752         BLI_linklist_free(datamasks, NULL);
1753
1754         /* Yay, we are done. If we have a DerivedMesh and deformed vertices need
1755          * to apply these back onto the DerivedMesh. If we have no DerivedMesh
1756          * then we need to build one.
1757          */
1758         if(dm && deformedVerts) {
1759                 *final_r = CDDM_copy(dm, 0);
1760
1761                 if(!(cage_r && dm == *cage_r)) dm->release(dm);
1762
1763                 CDDM_apply_vert_coords(*final_r, deformedVerts);
1764                 CDDM_calc_normals_mapping(*final_r);
1765         } else if (dm) {
1766                 *final_r = dm;
1767                 (*final_r)->calcNormals(*final_r); /* BMESH_ONLY - BMESH_TODO. check if this is needed */
1768         } else if (!deformedVerts && cage_r && *cage_r) {
1769                 *final_r = *cage_r;
1770                 (*final_r)->calcNormals(*final_r); /* BMESH_ONLY - BMESH_TODO. check if this is needed */
1771         } else {
1772                 *final_r = getEditDerivedBMesh(em, ob, deformedVerts);
1773                 deformedVerts = NULL;
1774                 (*final_r)->calcNormals(*final_r); /* BMESH_ONLY - BMESH_TODO. check if this is needed */
1775         }
1776
1777         /* add an orco layer if needed */
1778         if(dataMask & CD_MASK_ORCO)
1779                 add_orco_dm(ob, em, *final_r, orcodm, CD_ORCO);
1780
1781         if(orcodm)
1782                 orcodm->release(orcodm);
1783
1784         if(deformedVerts)
1785                 MEM_freeN(deformedVerts);
1786 }
1787
1788 static void clear_mesh_caches(Object *ob)
1789 {
1790         Mesh *me= ob->data;
1791
1792                 /* also serves as signal to remake texspace */
1793         if (ob->bb) {
1794                 MEM_freeN(ob->bb);
1795                 ob->bb = NULL;
1796         }
1797         if (me->bb) {
1798                 MEM_freeN(me->bb);
1799                 me->bb = NULL;
1800         }
1801
1802         freedisplist(&ob->disp);
1803
1804         if (ob->derivedFinal) {
1805                 ob->derivedFinal->needsFree = 1;
1806                 ob->derivedFinal->release(ob->derivedFinal);
1807                 ob->derivedFinal= NULL;
1808         }
1809         if (ob->derivedDeform) {
1810                 ob->derivedDeform->needsFree = 1;
1811                 ob->derivedDeform->release(ob->derivedDeform);
1812                 ob->derivedDeform= NULL;
1813         }
1814
1815         if(ob->sculpt) {
1816                 object_sculpt_modifiers_changed(ob);
1817         }
1818 }
1819
1820 static void mesh_build_data(Scene *scene, Object *ob, CustomDataMask dataMask,
1821         int build_shapekey_layers)
1822 {
1823         Object *obact = scene->basact?scene->basact->object:NULL;
1824         int editing = paint_facesel_test(ob);
1825         /* weight paint and face select need original indices because of selection buffer drawing */
1826         int needMapping = (ob==obact) && (editing || (ob->mode & (OB_MODE_WEIGHT_PAINT|OB_MODE_VERTEX_PAINT|OB_MODE_TEXTURE_PAINT)));
1827
1828         clear_mesh_caches(ob);
1829
1830         mesh_calc_modifiers(scene, ob, NULL, &ob->derivedDeform,
1831                                                 &ob->derivedFinal, 0, 1,
1832                                                 needMapping, dataMask, -1, 1, build_shapekey_layers);
1833
1834         DM_set_object_boundbox (ob, ob->derivedFinal);
1835
1836         ob->derivedFinal->needsFree = 0;
1837         ob->derivedDeform->needsFree = 0;
1838         ob->lastDataMask = dataMask;
1839 }
1840
1841 static void editbmesh_build_data(Scene *scene, Object *obedit, BMEditMesh *em, CustomDataMask dataMask)
1842 {
1843         clear_mesh_caches(obedit);
1844
1845         if (em->derivedFinal) {
1846                 if (em->derivedFinal!=em->derivedCage) {
1847                         em->derivedFinal->needsFree = 1;
1848                         em->derivedFinal->release(em->derivedFinal);
1849                 }
1850                 em->derivedFinal = NULL;
1851         }
1852         if (em->derivedCage) {
1853                 em->derivedCage->needsFree = 1;
1854                 em->derivedCage->release(em->derivedCage);
1855                 em->derivedCage = NULL;
1856         }
1857
1858         editbmesh_calc_modifiers(scene, obedit, em, &em->derivedCage, &em->derivedFinal, dataMask);
1859         DM_set_object_boundbox (obedit, em->derivedFinal);
1860
1861         em->lastDataMask = dataMask;
1862         em->derivedFinal->needsFree = 0;
1863         em->derivedCage->needsFree = 0;
1864 }
1865
1866 void makeDerivedMesh(Scene *scene, Object *ob, BMEditMesh *em,
1867         CustomDataMask dataMask, int build_shapekey_layers)
1868 {
1869         if (em) {
1870                 editbmesh_build_data(scene, ob, em, dataMask);
1871         } else {
1872                 mesh_build_data(scene, ob, dataMask, build_shapekey_layers);
1873         }
1874 }
1875
1876 /***/
1877
1878 DerivedMesh *mesh_get_derived_final(Scene *scene, Object *ob, CustomDataMask dataMask)
1879 {
1880         /* if there's no derived mesh or the last data mask used doesn't include
1881          * the data we need, rebuild the derived mesh
1882          */
1883         if(!ob->derivedFinal || (dataMask & ob->lastDataMask) != dataMask)
1884                 mesh_build_data(scene, ob, dataMask, 0);
1885
1886         return ob->derivedFinal;
1887 }
1888
1889 DerivedMesh *mesh_get_derived_deform(Scene *scene, Object *ob, CustomDataMask dataMask)
1890 {
1891         /* if there's no derived mesh or the last data mask used doesn't include
1892          * the data we need, rebuild the derived mesh
1893          */
1894         if(!ob->derivedDeform || (dataMask & ob->lastDataMask) != dataMask)
1895                 mesh_build_data(scene, ob, dataMask, 0);
1896
1897         return ob->derivedDeform;
1898 }
1899
1900 DerivedMesh *mesh_create_derived_render(Scene *scene, Object *ob, CustomDataMask dataMask)
1901 {
1902         DerivedMesh *final;
1903         
1904         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 1, 1, 0, dataMask, -1, 0, 0);
1905
1906         return final;
1907 }
1908
1909 DerivedMesh *mesh_create_derived_index_render(Scene *scene, Object *ob, CustomDataMask dataMask, int index)
1910 {
1911         DerivedMesh *final;
1912         
1913         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 1, 1, 0, dataMask, index, 0, 0);
1914
1915         return final;
1916 }
1917
1918 DerivedMesh *mesh_create_derived_view(Scene *scene, Object *ob, CustomDataMask dataMask)
1919 {
1920         DerivedMesh *final;
1921
1922         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 0, 1, 0, dataMask, -1, 0, 0);
1923
1924         return final;
1925 }
1926
1927 DerivedMesh *mesh_create_derived_no_deform(Scene *scene, Object *ob, float (*vertCos)[3],
1928                                                                                    CustomDataMask dataMask)
1929 {
1930         DerivedMesh *final;
1931         
1932         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, 0, 0, dataMask, -1, 0, 0);
1933
1934         return final;
1935 }
1936
1937 DerivedMesh *mesh_create_derived_no_virtual(Scene *scene, Object *ob, float (*vertCos)[3],
1938                                                                                         CustomDataMask dataMask)
1939 {
1940         DerivedMesh *final;
1941         
1942         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, -1, 0, dataMask, -1, 0, 0);
1943
1944         return final;
1945 }
1946
1947 DerivedMesh *mesh_create_derived_physics(Scene *scene, Object *ob, float (*vertCos)[3],
1948                                                                                         CustomDataMask dataMask)
1949 {
1950         DerivedMesh *final;
1951         
1952         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, -1, 1, dataMask, -1, 0, 0);
1953
1954         return final;
1955 }
1956
1957 DerivedMesh *mesh_create_derived_no_deform_render(Scene *scene, Object *ob,
1958                                                                                                   float (*vertCos)[3],
1959                                                                                                   CustomDataMask dataMask)
1960 {
1961         DerivedMesh *final;
1962
1963         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 1, 0, 0, dataMask, -1, 0, 0);
1964
1965         return final;
1966 }
1967
1968 /***/
1969
1970 DerivedMesh *editbmesh_get_derived_cage_and_final(Scene *scene, Object *obedit, BMEditMesh *em, DerivedMesh **final_r,
1971                                                                                                  CustomDataMask dataMask)
1972 {
1973         /* if there's no derived mesh or the last data mask used doesn't include
1974          * the data we need, rebuild the derived mesh
1975          */
1976         if(!em->derivedCage ||
1977            (em->lastDataMask & dataMask) != dataMask)
1978                 editbmesh_build_data(scene, obedit, em, dataMask);
1979
1980         *final_r = em->derivedFinal;
1981         return em->derivedCage;
1982 }
1983
1984 DerivedMesh *editbmesh_get_derived_cage(Scene *scene, Object *obedit, BMEditMesh *em, CustomDataMask dataMask)
1985 {
1986         /* if there's no derived mesh or the last data mask used doesn't include
1987          * the data we need, rebuild the derived mesh
1988          */
1989         if(!em->derivedCage ||
1990            (em->lastDataMask & dataMask) != dataMask)
1991                 editbmesh_build_data(scene, obedit, em, dataMask);
1992
1993         return em->derivedCage;
1994 }
1995
1996 DerivedMesh *editbmesh_get_derived_base(Object *obedit, BMEditMesh *em)
1997 {
1998         return getEditDerivedBMesh(em, obedit, NULL);
1999 }
2000
2001
2002 /* ********* For those who don't grasp derived stuff! (ton) :) *************** */
2003
2004 static void make_vertexcosnos__mapFunc(void *userData, int index, float *co, float *no_f, short *no_s)
2005 {
2006         float *vec = userData;
2007         
2008         vec+= 6*index;
2009
2010         /* check if we've been here before (normal should not be 0) */
2011         if(vec[3] || vec[4] || vec[5]) return;
2012
2013         copy_v3_v3(vec, co);
2014         vec+= 3;
2015         if(no_f) {
2016                 copy_v3_v3(vec, no_f);
2017         }
2018         else {
2019                 normal_short_to_float_v3(vec, no_s);
2020         }
2021 }
2022
2023 /* always returns original amount me->totvert of vertices and normals, but fully deformed and subsurfered */
2024 /* this is needed for all code using vertexgroups (no subsurf support) */
2025 /* it stores the normals as floats, but they can still be scaled as shorts (32767 = unit) */
2026 /* in use now by vertex/weight paint and particle generating */
2027
2028 float *mesh_get_mapped_verts_nors(Scene *scene, Object *ob)
2029 {
2030         Mesh *me= ob->data;
2031         DerivedMesh *dm;
2032         float *vertexcosnos;
2033         
2034         /* lets prevent crashing... */
2035         if(ob->type!=OB_MESH || me->totvert==0)
2036                 return NULL;
2037         
2038         dm= mesh_get_derived_final(scene, ob, CD_MASK_BAREMESH|CD_MASK_ORIGINDEX);
2039         vertexcosnos= MEM_callocN(6*sizeof(float)*me->totvert, "vertexcosnos map");
2040         
2041         if(dm->foreachMappedVert) {
2042                 dm->foreachMappedVert(dm, make_vertexcosnos__mapFunc, vertexcosnos);
2043         }
2044         else {
2045                 float *fp= vertexcosnos;
2046                 int a;
2047                 
2048                 for(a=0; a< me->totvert; a++, fp+=6) {
2049                         dm->getVertCo(dm, a, fp);
2050                         dm->getVertNo(dm, a, fp+3);
2051                 }
2052         }
2053         
2054         dm->release(dm);
2055         return vertexcosnos;
2056 }
2057
2058 /* ******************* GLSL ******************** */
2059
2060 typedef struct
2061 {
2062         float * precomputedFaceNormals;
2063         MTFace * mtface;        // texture coordinates
2064         MFace * mface;          // indices
2065         MVert * mvert;          // vertices & normals
2066         float (*orco)[3];
2067         float (*tangent)[4];    // destination
2068         int numTessFaces;
2069
2070 } SGLSLMeshToTangent;
2071
2072 // interface
2073 #include "mikktspace.h"
2074
2075 static int GetNumFaces(const SMikkTSpaceContext * pContext)
2076 {
2077         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2078         return pMesh->numTessFaces;
2079 }
2080
2081 static int GetNumVertsOfFace(const SMikkTSpaceContext * pContext, const int face_num)
2082 {
2083         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2084         return pMesh->mface[face_num].v4!=0 ? 4 : 3;
2085 }
2086
2087 static void GetPosition(const SMikkTSpaceContext * pContext, float fPos[], const int face_num, const int vert_index)
2088 {
2089         //assert(vert_index>=0 && vert_index<4);
2090         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2091         const float *co= pMesh->mvert[(&pMesh->mface[face_num].v1)[vert_index]].co;
2092         copy_v3_v3(fPos, co);
2093 }
2094
2095 static void GetTextureCoordinate(const SMikkTSpaceContext * pContext, float fUV[], const int face_num, const int vert_index)
2096 {
2097         //assert(vert_index>=0 && vert_index<4);
2098         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2099
2100         if(pMesh->mtface!=NULL) {
2101                 float * uv = pMesh->mtface[face_num].uv[vert_index];
2102                 fUV[0]=uv[0]; fUV[1]=uv[1];
2103         }
2104         else {
2105                 const float *orco= pMesh->orco[(&pMesh->mface[face_num].v1)[vert_index]];
2106                 map_to_sphere( &fUV[0], &fUV[1], orco[0], orco[1], orco[2]);
2107         }
2108 }
2109
2110 static void GetNormal(const SMikkTSpaceContext * pContext, float fNorm[], const int face_num, const int vert_index)
2111 {
2112         //assert(vert_index>=0 && vert_index<4);
2113         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2114
2115         const int smoothnormal = (pMesh->mface[face_num].flag & ME_SMOOTH);
2116         if(!smoothnormal) {     // flat
2117                 if(pMesh->precomputedFaceNormals) {
2118                         copy_v3_v3(fNorm, &pMesh->precomputedFaceNormals[3*face_num]);
2119                 }
2120                 else {
2121                         MFace *mf= &pMesh->mface[face_num];
2122                         float *p0= pMesh->mvert[mf->v1].co;
2123                         float *p1= pMesh->mvert[mf->v2].co;
2124                         float *p2= pMesh->mvert[mf->v3].co;
2125
2126                         if(mf->v4) {
2127                                 float *p3 = pMesh->mvert[mf->v4].co;
2128                                 normal_quad_v3(fNorm, p0, p1, p2, p3);
2129                         }
2130                         else {
2131                                 normal_tri_v3(fNorm, p0, p1, p2);
2132                         }
2133                 }
2134         }
2135         else {
2136                 const short *no= pMesh->mvert[(&pMesh->mface[face_num].v1)[vert_index]].no;
2137                 normal_short_to_float_v3(fNorm, no);
2138         }
2139 }
2140 static void SetTSpace(const SMikkTSpaceContext * pContext, const float fvTangent[], const float fSign, const int face_num, const int iVert)
2141 {
2142         //assert(vert_index>=0 && vert_index<4);
2143         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2144         float * pRes = pMesh->tangent[4*face_num+iVert];
2145         copy_v3_v3(pRes, fvTangent);
2146         pRes[3]=fSign;
2147 }
2148
2149
2150 void DM_add_tangent_layer(DerivedMesh *dm)
2151 {
2152         /* mesh vars */
2153         MTFace *mtface, *tf;
2154         MFace *mface, *mf;
2155         MVert *mvert, *v1, *v2, *v3, *v4;
2156         MemArena *arena= NULL;
2157         VertexTangent **vtangents= NULL;
2158         float (*orco)[3]= NULL, (*tangent)[4];
2159         float *uv1, *uv2, *uv3, *uv4, *vtang;
2160         float fno[3], tang[3], uv[4][2];
2161         int i, j, len, mf_vi[4], totvert, totface, iCalcNewMethod;
2162         float *nors;
2163
2164         if(CustomData_get_layer_index(&dm->faceData, CD_TANGENT) != -1)
2165                 return;
2166
2167         nors = dm->getTessFaceDataArray(dm, CD_NORMAL);
2168
2169         /* check we have all the needed layers */
2170         totvert= dm->getNumVerts(dm);
2171         totface= dm->getNumTessFaces(dm);
2172
2173         mvert= dm->getVertArray(dm);
2174         mface= dm->getTessFaceArray(dm);
2175         mtface= dm->getTessFaceDataArray(dm, CD_MTFACE);
2176
2177         if(!mtface) {
2178                 orco= dm->getVertDataArray(dm, CD_ORCO);
2179                 if(!orco)
2180                         return;
2181         }
2182         
2183         /* create tangent layer */
2184         DM_add_tessface_layer(dm, CD_TANGENT, CD_CALLOC, NULL);
2185         tangent= DM_get_tessface_data_layer(dm, CD_TANGENT);
2186         
2187         /* allocate some space */
2188         arena= BLI_memarena_new(BLI_MEMARENA_STD_BUFSIZE, "tangent layer arena");
2189         BLI_memarena_use_calloc(arena);
2190         vtangents= MEM_callocN(sizeof(VertexTangent*)*totvert, "VertexTangent");
2191
2192         // new computation method
2193         iCalcNewMethod = 1;
2194         if(iCalcNewMethod != 0) {
2195                 SGLSLMeshToTangent mesh2tangent= {0};
2196                 SMikkTSpaceContext sContext= {0};
2197                 SMikkTSpaceInterface sInterface= {0};
2198
2199                 mesh2tangent.precomputedFaceNormals = nors;
2200                 mesh2tangent.mtface = mtface;
2201                 mesh2tangent.mface = mface;
2202                 mesh2tangent.mvert = mvert;
2203                 mesh2tangent.orco = orco;
2204                 mesh2tangent.tangent = tangent;
2205                 mesh2tangent.numTessFaces = totface;
2206
2207                 sContext.m_pUserData = &mesh2tangent;
2208                 sContext.m_pInterface = &sInterface;
2209                 sInterface.m_getNumFaces = GetNumFaces;
2210                 sInterface.m_getNumVerticesOfFace = GetNumVertsOfFace;
2211                 sInterface.m_getPosition = GetPosition;
2212                 sInterface.m_getTexCoord = GetTextureCoordinate;
2213                 sInterface.m_getNormal = GetNormal;
2214                 sInterface.m_setTSpaceBasic = SetTSpace;
2215
2216                 // 0 if failed
2217                 iCalcNewMethod = genTangSpaceDefault(&sContext);
2218         }
2219
2220         if(!iCalcNewMethod) {
2221                 /* sum tangents at connected vertices */
2222                 for(i=0, tf=mtface, mf=mface; i < totface; mf++, tf++, i++) {
2223                         v1= &mvert[mf->v1];
2224                         v2= &mvert[mf->v2];
2225                         v3= &mvert[mf->v3];
2226
2227                         if (mf->v4) {
2228                                 v4= &mvert[mf->v4];
2229                                 normal_quad_v3( fno,v4->co, v3->co, v2->co, v1->co);
2230                         }
2231                         else {
2232                                 v4= NULL;
2233                                 normal_tri_v3( fno,v3->co, v2->co, v1->co);
2234                         }
2235                 
2236                         if(mtface) {
2237                                 uv1= tf->uv[0];
2238                                 uv2= tf->uv[1];
2239                                 uv3= tf->uv[2];
2240                                 uv4= tf->uv[3];
2241                         }
2242                         else {
2243                                 uv1= uv[0]; uv2= uv[1]; uv3= uv[2]; uv4= uv[3];
2244                                 map_to_sphere( &uv[0][0], &uv[0][1],orco[mf->v1][0], orco[mf->v1][1], orco[mf->v1][2]);
2245                                 map_to_sphere( &uv[1][0], &uv[1][1],orco[mf->v2][0], orco[mf->v2][1], orco[mf->v2][2]);
2246                                 map_to_sphere( &uv[2][0], &uv[2][1],orco[mf->v3][0], orco[mf->v3][1], orco[mf->v3][2]);
2247                                 if(v4)
2248                                         map_to_sphere( &uv[3][0], &uv[3][1],orco[mf->v4][0], orco[mf->v4][1], orco[mf->v4][2]);
2249                         }
2250                 
2251                         tangent_from_uv(uv1, uv2, uv3, v1->co, v2->co, v3->co, fno, tang);
2252                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v1], tang, uv1);
2253                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v2], tang, uv2);
2254                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v3], tang, uv3);
2255                 
2256                         if(mf->v4) {
2257                                 v4= &mvert[mf->v4];
2258                         
2259                                 tangent_from_uv(uv1, uv3, uv4, v1->co, v3->co, v4->co, fno, tang);
2260                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v1], tang, uv1);
2261                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v3], tang, uv3);
2262                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v4], tang, uv4);
2263                         }
2264                 }
2265         
2266                 /* write tangent to layer */
2267                 for(i=0, tf=mtface, mf=mface; i < totface; mf++, tf++, i++, tangent+=4) {
2268                         len= (mf->v4)? 4 : 3; 
2269
2270                         if(mtface == NULL) {
2271                                 map_to_sphere( &uv[0][0], &uv[0][1],orco[mf->v1][0], orco[mf->v1][1], orco[mf->v1][2]);
2272                                 map_to_sphere( &uv[1][0], &uv[1][1],orco[mf->v2][0], orco[mf->v2][1], orco[mf->v2][2]);
2273                                 map_to_sphere( &uv[2][0], &uv[2][1],orco[mf->v3][0], orco[mf->v3][1], orco[mf->v3][2]);
2274                                 if(len==4)
2275                                         map_to_sphere( &uv[3][0], &uv[3][1],orco[mf->v4][0], orco[mf->v4][1], orco[mf->v4][2]);
2276                         }
2277                 
2278                         mf_vi[0]= mf->v1;
2279                         mf_vi[1]= mf->v2;
2280                         mf_vi[2]= mf->v3;
2281                         mf_vi[3]= mf->v4;
2282                 
2283                         for(j=0; j<len; j++) {
2284                                 vtang= find_vertex_tangent(vtangents[mf_vi[j]], mtface ? tf->uv[j] : uv[j]);
2285                                 normalize_v3_v3(tangent[j], vtang);
2286                                 ((float *) tangent[j])[3]=1.0f;
2287                         }
2288                 }
2289         }
2290         
2291         BLI_memarena_free(arena);
2292         MEM_freeN(vtangents);
2293 }
2294
2295 void DM_calc_auto_bump_scale(DerivedMesh *dm)
2296 {
2297         /* int totvert= dm->getNumVerts(dm); */ /* UNUSED */
2298         int totface= dm->getNumTessFaces(dm);
2299
2300         MVert * mvert = dm->getVertArray(dm);
2301         MFace * mface = dm->getTessFaceArray(dm);
2302         MTFace * mtface = dm->getTessFaceDataArray(dm, CD_MTFACE);
2303
2304         if(mtface)
2305         {
2306                 double dsum = 0.0;
2307                 int nr_accumulated = 0;
2308                 int f;
2309
2310                 for ( f=0; f<totface; f++ )
2311                 {
2312                         {
2313                                 float * verts[4], * tex_coords[4];
2314                                 const int nr_verts = mface[f].v4!=0 ? 4 : 3;
2315                                 int i, is_degenerate;
2316
2317                                 verts[0]=mvert[mface[f].v1].co; verts[1]=mvert[mface[f].v2].co; verts[2]=mvert[mface[f].v3].co;
2318                                 tex_coords[0]=mtface[f].uv[0]; tex_coords[1]=mtface[f].uv[1]; tex_coords[2]=mtface[f].uv[2];
2319                                 if(nr_verts==4)
2320                                 {
2321                                         verts[3]=mvert[mface[f].v4].co;
2322                                         tex_coords[3]=mtface[f].uv[3];
2323                                 }
2324
2325                                 // discard degenerate faces
2326                                 is_degenerate = 0;
2327                                 if(     equals_v3v3(verts[0], verts[1]) || equals_v3v3(verts[0], verts[2]) || equals_v3v3(verts[1], verts[2]) ||
2328                                         equals_v2v2(tex_coords[0], tex_coords[1]) || equals_v2v2(tex_coords[0], tex_coords[2]) || equals_v2v2(tex_coords[1], tex_coords[2]) )
2329                                 {
2330                                         is_degenerate = 1;
2331                                 }
2332
2333                                 // verify last vertex as well if this is a quad
2334                                 if ( is_degenerate==0 && nr_verts==4 )
2335                                 {
2336                                         if(     equals_v3v3(verts[3], verts[0]) || equals_v3v3(verts[3], verts[1]) || equals_v3v3(verts[3], verts[2]) ||
2337                                                 equals_v2v2(tex_coords[3], tex_coords[0]) || equals_v2v2(tex_coords[3], tex_coords[1]) || equals_v2v2(tex_coords[3], tex_coords[2]) )
2338                                         {
2339                                                 is_degenerate = 1;
2340                                         }
2341
2342                                         // verify the winding is consistent
2343                                         if ( is_degenerate==0 )
2344                                         {
2345                                                 float prev_edge[2];
2346                                                 int is_signed = 0;
2347                                                 sub_v2_v2v2(prev_edge, tex_coords[0], tex_coords[3]);
2348
2349                                                 i = 0;
2350                                                 while ( is_degenerate==0 && i<4 )
2351                                                 {
2352                                                         float cur_edge[2], signed_area;
2353                                                         sub_v2_v2v2(cur_edge, tex_coords[(i+1)&0x3], tex_coords[i]);
2354                                                         signed_area = prev_edge[0]*cur_edge[1] - prev_edge[1]*cur_edge[0];
2355                                                         if ( i==0 ) is_signed = signed_area<0.0f ? 1 : 0;
2356                                                         else if((is_signed!=0)!=(signed_area<0.0f)) is_degenerate=1;
2357
2358                                                         if ( is_degenerate==0 )
2359                                                         {
2360                                                                 copy_v2_v2(prev_edge, cur_edge);
2361                                                                 ++i;
2362                                                         }
2363                                                 }
2364                                         }
2365                                 }
2366
2367                                 // proceed if not a degenerate face
2368                                 if ( is_degenerate==0 )
2369                                 {
2370                                         int nr_tris_to_pile=0;
2371                                         // quads split at shortest diagonal
2372                                         int offs = 0;           // initial triangulation is 0,1,2 and 0, 2, 3
2373                                         if ( nr_verts==4 )
2374                                         {
2375                                                 float pos_len_diag0, pos_len_diag1;
2376                                                 float vtmp[3];
2377                                                 sub_v3_v3v3(vtmp, verts[2], verts[0]);
2378                                                 pos_len_diag0 = dot_v3v3(vtmp, vtmp);
2379                                                 sub_v3_v3v3(vtmp, verts[3], verts[1]);
2380                                                 pos_len_diag1 = dot_v3v3(vtmp, vtmp);
2381
2382                                                 if(pos_len_diag1<pos_len_diag0)
2383                                                         offs=1;         // alter split
2384                                                 else if(pos_len_diag0==pos_len_diag1)           // do UV check instead
2385                                                 {
2386                                                         float tex_len_diag0, tex_len_diag1;
2387
2388                                                         sub_v2_v2v2(vtmp, tex_coords[2], tex_coords[0]);
2389                                                         tex_len_diag0 = dot_v2v2(vtmp, vtmp);
2390                                                         sub_v2_v2v2(vtmp, tex_coords[3], tex_coords[1]);
2391                                                         tex_len_diag1 = dot_v2v2(vtmp, vtmp);
2392
2393                                                         if(tex_len_diag1<tex_len_diag0)
2394                                                         {
2395                                                                 offs=1;         // alter split
2396                                                         }
2397                                                 }
2398                                         }
2399                                         nr_tris_to_pile = nr_verts-2 ;
2400                                         if ( nr_tris_to_pile==1 || nr_tris_to_pile==2 )
2401                                         {
2402                                                 const int indices[] = {offs+0, offs+1, offs+2, offs+0, offs+2, (offs+3)&0x3 };
2403                                                 int t;
2404                                                 for ( t=0; t<nr_tris_to_pile; t++ )
2405                                                 {
2406                                                         float f2x_area_uv;
2407                                                         float * p0 = verts[indices[t*3+0]];
2408                                                         float * p1 = verts[indices[t*3+1]];
2409                                                         float * p2 = verts[indices[t*3+2]];
2410
2411                                                         float edge_t0[2], edge_t1[2];
2412                                                         sub_v2_v2v2(edge_t0, tex_coords[indices[t*3+1]], tex_coords[indices[t*3+0]]);
2413                                                         sub_v2_v2v2(edge_t1, tex_coords[indices[t*3+2]], tex_coords[indices[t*3+0]]);
2414
2415                                                         f2x_area_uv = fabsf(edge_t0[0]*edge_t1[1] - edge_t0[1]*edge_t1[0]);
2416                                                         if ( f2x_area_uv>FLT_EPSILON )
2417                                                         {
2418                                                                 float norm[3], v0[3], v1[3], f2x_surf_area, fsurf_ratio;
2419                                                                 sub_v3_v3v3(v0, p1, p0);
2420                                                                 sub_v3_v3v3(v1, p2, p0);
2421                                                                 cross_v3_v3v3(norm, v0, v1);
2422
2423                                                                 f2x_surf_area = len_v3(norm);
2424                                                                 fsurf_ratio = f2x_surf_area/f2x_area_uv;        // tri area divided by texture area
2425
2426                                                                 ++nr_accumulated;
2427                                                                 dsum += (double)(fsurf_ratio);
2428                                                         }
2429                                                 }
2430                                         }
2431                                 }
2432                         }
2433                 }
2434
2435                 // finalize
2436                 {
2437                         const float avg_area_ratio = (nr_accumulated>0) ? ((float)(dsum / nr_accumulated)) : 1.0f;
2438                         const float use_as_render_bump_scale = sqrtf(avg_area_ratio);           // use width of average surface ratio as your bump scale
2439                         dm->auto_bump_scale = use_as_render_bump_scale;
2440                 }
2441         }
2442         else
2443         {
2444                 dm->auto_bump_scale = 1.0f;
2445         }
2446 }
2447
2448 void DM_vertex_attributes_from_gpu(DerivedMesh *dm, GPUVertexAttribs *gattribs, DMVertexAttribs *attribs)
2449 {
2450         CustomData *vdata, *fdata, *tfdata = NULL;
2451         int a, b, layer;
2452
2453         /* From the layers requested by the GLSL shader, figure out which ones are
2454          * actually available for this derivedmesh, and retrieve the pointers */
2455
2456         memset(attribs, 0, sizeof(DMVertexAttribs));
2457
2458         vdata = &dm->vertData;
2459         fdata = tfdata = dm->getTessFaceDataLayout(dm);
2460         
2461         /* calc auto bump scale if necessary */
2462         if(dm->auto_bump_scale<=0.0f)
2463                 DM_calc_auto_bump_scale(dm);
2464
2465         /* add a tangent layer if necessary */
2466         for(b = 0; b < gattribs->totlayer; b++)
2467                 if(gattribs->layer[b].type == CD_TANGENT)
2468                         if(CustomData_get_layer_index(fdata, CD_TANGENT) == -1)
2469                                 DM_add_tangent_layer(dm);
2470
2471         for(b = 0; b < gattribs->totlayer; b++) {
2472                 if(gattribs->layer[b].type == CD_MTFACE) {
2473                         /* uv coordinates */
2474                         if(gattribs->layer[b].name[0])
2475                                 layer = CustomData_get_named_layer_index(tfdata, CD_MTFACE,
2476                                         gattribs->layer[b].name);
2477                         else
2478                                 layer = CustomData_get_active_layer_index(tfdata, CD_MTFACE);
2479
2480                         if(layer != -1) {
2481                                 a = attribs->tottface++;
2482
2483                                 attribs->tface[a].array = tfdata->layers[layer].data;
2484                                 attribs->tface[a].emOffset = tfdata->layers[layer].offset;
2485                                 attribs->tface[a].glIndex = gattribs->layer[b].glindex;
2486                                 /* attribs->tface[a].glTexco = gattribs->layer[b].gltexco; */ /* BMESH_TODO, trunk has this but not bmesh, need to investigate whats going on here - campbell */
2487                         }
2488                         /* BMESH ONLY, may need to get this working?, otherwise remove */
2489                         /* else {
2490                                 int player;
2491                                 CustomData *pdata = dm->getPolyDataLayout(dm);
2492                                 
2493                                 if(gattribs->layer[b].name[0])
2494                                         player = CustomData_get_named_layer_index(pdata, CD_MTEXPOLY,
2495                                                 gattribs->layer[b].name);
2496                                 else
2497                                         player = CustomData_get_active_layer_index(pdata, CD_MTEXPOLY);
2498                                 
2499                                 if (player != -1) {
2500                                         a = attribs->tottface++;
2501         
2502                                         attribs->tface[a].array = NULL;
2503                                         attribs->tface[a].emOffset = pdata->layers[layer].offset;
2504                                         attribs->tface[a].glIndex = gattribs->layer[b].glindex;
2505                                         attribs->tface[a].glTexco = gattribs->layer[b].gltexco;
2506                                         
2507                                 }
2508                         }
2509                         */
2510                 }
2511                 else if(gattribs->layer[b].type == CD_MCOL) {
2512                         /* vertex colors */
2513                         if(gattribs->layer[b].name[0])
2514                                 layer = CustomData_get_named_layer_index(tfdata, CD_MCOL,
2515                                         gattribs->layer[b].name);
2516                         else
2517                                 layer = CustomData_get_active_layer_index(tfdata, CD_MCOL);
2518
2519                         if(layer != -1) {
2520                                 a = attribs->totmcol++;
2521
2522                                 attribs->mcol[a].array = tfdata->layers[layer].data;
2523                                 attribs->mcol[a].emOffset = tfdata->layers[layer].offset;
2524                                 attribs->mcol[a].glIndex = gattribs->layer[b].glindex;
2525                         }
2526                 }
2527                 else if(gattribs->layer[b].type == CD_TANGENT) {
2528                         /* tangents */
2529                         layer = CustomData_get_layer_index(fdata, CD_TANGENT);
2530
2531                         if(layer != -1) {
2532                                 attribs->tottang = 1;
2533
2534                                 attribs->tang.array = fdata->layers[layer].data;
2535                                 attribs->tang.emOffset = fdata->layers[layer].offset;
2536                                 attribs->tang.glIndex = gattribs->layer[b].glindex;
2537                         }
2538                 }
2539                 else if(gattribs->layer[b].type == CD_ORCO) {
2540                         /* original coordinates */
2541                         layer = CustomData_get_layer_index(vdata, CD_ORCO);
2542
2543                         if(layer != -1) {
2544                                 attribs->totorco = 1;
2545
2546                                 attribs->orco.array = vdata->layers[layer].data;
2547                                 attribs->orco.emOffset = vdata->layers[layer].offset;
2548                                 attribs->orco.glIndex = gattribs->layer[b].glindex;
2549                                 attribs->orco.glTexco = gattribs->layer[b].gltexco;
2550                         }
2551                 }
2552         }
2553 }
2554
2555 /* Set object's bounding box based on DerivedMesh min/max data */
2556 void DM_set_object_boundbox(Object *ob, DerivedMesh *dm)
2557 {
2558         float min[3], max[3];
2559
2560         INIT_MINMAX(min, max);
2561
2562         dm->getMinMax(dm, min, max);
2563
2564         if(!ob->bb)
2565                 ob->bb= MEM_callocN(sizeof(BoundBox), "DM-BoundBox");
2566
2567         boundbox_set_from_min_max(ob->bb, min, max);
2568 }
2569
2570 /* --- NAVMESH (begin) --- */
2571 #ifdef WITH_GAMEENGINE
2572
2573 BM_INLINE int navmesh_bit(int a, int b)
2574 {
2575         return (a & (1 << b)) >> b;
2576 }
2577
2578 BM_INLINE void navmesh_intToCol(int i, float col[3])
2579 {
2580         int     r = navmesh_bit(i, 0) + navmesh_bit(i, 3) * 2 + 1;
2581         int     g = navmesh_bit(i, 1) + navmesh_bit(i, 4) * 2 + 1;
2582         int     b = navmesh_bit(i, 2) + navmesh_bit(i, 5) * 2 + 1;
2583         col[0] = 1 - r*63.0f/255.0f;
2584         col[1] = 1 - g*63.0f/255.0f;
2585         col[2] = 1 - b*63.0f/255.0f;
2586 }
2587
2588 static void navmesh_drawColored(DerivedMesh *dm)
2589 {
2590         int a, glmode;
2591         MVert *mvert = (MVert *)CustomData_get_layer(&dm->vertData, CD_MVERT);
2592         MFace *mface = (MFace *)CustomData_get_layer(&dm->faceData, CD_MFACE);
2593         int *polygonIdx = (int *)CustomData_get_layer(&dm->faceData, CD_RECAST);
2594         float col[3];
2595
2596         if (!polygonIdx)
2597                 return;
2598
2599         /*
2600         //UI_ThemeColor(TH_WIRE);
2601         glDisable(GL_LIGHTING);
2602         glLineWidth(2.0);
2603         dm->drawEdges(dm, 0, 1);
2604         glLineWidth(1.0);
2605         glEnable(GL_LIGHTING);*/
2606
2607         glDisable(GL_LIGHTING);
2608         /*  if(GPU_buffer_legacy(dm) ) */ { /* TODO - VBO draw code, not high priority - campbell */
2609                 DEBUG_VBO( "Using legacy code. drawNavMeshColored\n" );
2610                 //glShadeModel(GL_SMOOTH);
2611                 glBegin(glmode = GL_QUADS);
2612                 for(a = 0; a < dm->numTessFaceData; a++, mface++) {
2613                         int new_glmode = mface->v4?GL_QUADS:GL_TRIANGLES;
2614                         int pi = polygonIdx[a];
2615                         if (pi <= 0) {
2616                                 zero_v3(col);
2617                         }
2618                         else {
2619                                 navmesh_intToCol(pi, col);
2620                         }
2621
2622                         if(new_glmode != glmode) {
2623                                 glEnd();
2624                                 glBegin(glmode = new_glmode);
2625                         }
2626                         glColor3fv(col);
2627                         glVertex3fv(mvert[mface->v1].co);
2628                         glVertex3fv(mvert[mface->v2].co);
2629                         glVertex3fv(mvert[mface->v3].co);
2630                         if(mface->v4) {
2631                                 glVertex3fv(mvert[mface->v4].co);
2632                         }
2633                 }
2634                 glEnd();
2635         }
2636         glEnable(GL_LIGHTING);
2637 }
2638
2639 static void navmesh_DM_drawFacesTex(DerivedMesh *dm,
2640                         int (*setDrawOptions)(MTFace *tface, int has_mcol, int matnr),
2641                         int (*compareDrawOptions)(void *userData, int cur_index, int next_index),
2642                         void *userData)
2643 {
2644         (void) setDrawOptions;
2645         (void) compareDrawOptions;
2646         (void) userData;
2647
2648         navmesh_drawColored(dm);
2649 }
2650
2651 static void navmesh_DM_drawFacesSolid(DerivedMesh *dm,
2652                                       float (*partial_redraw_planes)[4],
2653                                       int UNUSED(fast), int (*setMaterial)(int, void *attribs))
2654 {
2655         (void) partial_redraw_planes;
2656         (void) setMaterial;
2657
2658         //drawFacesSolid_original(dm, partial_redraw_planes, fast, setMaterial);
2659         navmesh_drawColored(dm);
2660 }
2661
2662 static DerivedMesh *navmesh_dm_createNavMeshForVisualization(DerivedMesh *dm)
2663 {
2664         DerivedMesh *result;
2665         int maxFaces = dm->getNumPolys(dm);
2666         int *recastData;
2667         int vertsPerPoly=0, nverts=0, ndtris=0, npolys=0;
2668         float* verts=NULL;
2669         unsigned short *dtris=NULL, *dmeshes=NULL, *polys=NULL;
2670         int *dtrisToPolysMap=NULL, *dtrisToTrisMap=NULL, *trisToFacesMap=NULL;
2671         int res;
2672
2673         result = CDDM_copy(dm, 0);
2674         if (!CustomData_has_layer(&result->faceData, CD_RECAST)) {
2675                 int *sourceRecastData = (int*)CustomData_get_layer(&dm->faceData, CD_RECAST);
2676                 if (sourceRecastData) {
2677                         CustomData_add_layer_named(&result->faceData, CD_RECAST, CD_DUPLICATE,
2678                                                    sourceRecastData, maxFaces, "recastData");
2679                 }
2680         }
2681         recastData = (int*)CustomData_get_layer(&result->faceData, CD_RECAST);
2682
2683         /* note: This is not good design! - really should not be doing this */
2684         result->drawFacesTex =  navmesh_DM_drawFacesTex;
2685         result->drawFacesSolid = navmesh_DM_drawFacesSolid;
2686
2687
2688         /* process mesh */
2689         res  = buildNavMeshDataByDerivedMesh(dm, &vertsPerPoly, &nverts, &verts, &ndtris, &dtris,
2690                                              &npolys, &dmeshes, &polys, &dtrisToPolysMap, &dtrisToTrisMap,
2691                                              &trisToFacesMap);
2692         if (res) {
2693                 size_t polyIdx;
2694
2695                 /* invalidate concave polygon */
2696                 for (polyIdx=0; polyIdx<(size_t)npolys; polyIdx++) {
2697                         unsigned short* poly = &polys[polyIdx*2*vertsPerPoly];
2698                         if (!polyIsConvex(poly, vertsPerPoly, verts)) {
2699                                 /* set negative polygon idx to all faces */
2700                                 unsigned short *dmesh = &dmeshes[4*polyIdx];
2701                                 unsigned short tbase = dmesh[2];
2702                                 unsigned short tnum = dmesh[3];
2703                                 unsigned short ti;
2704
2705                                 for (ti=0; ti<tnum; ti++) {
2706                                         unsigned short triidx = dtrisToTrisMap[tbase+ti];
2707                                         unsigned short faceidx = trisToFacesMap[triidx];
2708                                         if (recastData[faceidx] > 0) {
2709                                                 recastData[faceidx] = -recastData[faceidx];
2710                                         }
2711                                 }
2712                         }
2713                 }
2714         }
2715         else {
2716                 printf("Error during creation polygon infos\n");
2717         }
2718
2719         /* clean up */
2720         if (verts!=NULL)
2721                 MEM_freeN(verts);
2722         if (dtris!=NULL)
2723                 MEM_freeN(dtris);
2724         if (dmeshes!=NULL)
2725                 MEM_freeN(dmeshes);
2726         if (polys!=NULL)
2727                 MEM_freeN(polys);
2728         if (dtrisToPolysMap!=NULL)
2729                 MEM_freeN(dtrisToPolysMap);
2730         if (dtrisToTrisMap!=NULL)
2731                 MEM_freeN(dtrisToTrisMap);
2732         if (trisToFacesMap!=NULL)
2733                 MEM_freeN(trisToFacesMap);
2734
2735         return result;
2736 }
2737
2738 #endif /* WITH_GAMEENGINE */
2739
2740 /* --- NAVMESH (end) --- */