svn merge ^/trunk/blender -r42680:42722
[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 void DM_to_mesh(DerivedMesh *dm, Mesh *me, Object *ob)
356 {
357         /* dm might depend on me, so we need to do everything with a local copy */
358         Mesh tmp = *me;
359         int totvert, totedge /*, totface */ /* UNUSED */, totloop, totpoly;
360         int did_shapekeys=0;
361         
362         memset(&tmp.vdata, 0, sizeof(tmp.vdata));
363         memset(&tmp.edata, 0, sizeof(tmp.edata));
364         memset(&tmp.fdata, 0, sizeof(tmp.fdata));
365         memset(&tmp.ldata, 0, sizeof(tmp.ldata));
366         memset(&tmp.pdata, 0, sizeof(tmp.pdata));
367
368         totvert = tmp.totvert = dm->getNumVerts(dm);
369         totedge = tmp.totedge = dm->getNumEdges(dm);
370         totloop = tmp.totloop = dm->getNumLoops(dm);
371         totpoly = tmp.totpoly = dm->getNumPolys(dm);
372
373         CustomData_copy(&dm->vertData, &tmp.vdata, CD_MASK_MESH, CD_DUPLICATE, totvert);
374         CustomData_copy(&dm->edgeData, &tmp.edata, CD_MASK_MESH, CD_DUPLICATE, totedge);
375         CustomData_copy(&dm->loopData, &tmp.ldata, CD_MASK_MESH, CD_DUPLICATE, totloop);
376         CustomData_copy(&dm->polyData, &tmp.pdata, CD_MASK_MESH, CD_DUPLICATE, totpoly);
377
378         if (CustomData_has_layer(&dm->vertData, CD_SHAPEKEY)) {
379                 KeyBlock *kb;
380                 int i=0;
381                 
382                 if (ob) {
383                         for (kb=me->key->block.first; kb; kb=kb->next, i++) {
384                                 if (i == ob->shapenr-1) {
385                                         i = kb->uid;
386                                         break;
387                                 }
388                         }
389                         
390                         if (!kb) {
391                                 printf("%s: error - could not find active shapekey %d!\n",
392                                        __func__, ob->shapenr-1);
393
394                                 i = INT_MAX;
395                         }
396                 } else {
397                         /*if no object, set to INT_MAX so we don't mess up any shapekey layers*/
398                         i = INT_MAX;
399                 }
400                 
401                 shapekey_layers_to_keyblocks(dm, me, i);
402                 did_shapekeys = 1;
403         }
404         
405         /* not all DerivedMeshes store their verts/edges/faces in CustomData, so
406            we set them here in case they are missing */
407         if(!CustomData_has_layer(&tmp.vdata, CD_MVERT))
408                 CustomData_add_layer(&tmp.vdata, CD_MVERT, CD_ASSIGN, dm->dupVertArray(dm), totvert);
409         if(!CustomData_has_layer(&tmp.edata, CD_MEDGE))
410                 CustomData_add_layer(&tmp.edata, CD_MEDGE, CD_ASSIGN, dm->dupEdgeArray(dm), totedge);
411         if(!CustomData_has_layer(&tmp.pdata, CD_MPOLY)) {
412                 tmp.mloop = dm->dupLoopArray(dm);
413                 tmp.mpoly = dm->dupPolyArray(dm);
414
415                 CustomData_add_layer(&tmp.ldata, CD_MLOOP, CD_ASSIGN, tmp.mloop, tmp.totloop);
416                 CustomData_add_layer(&tmp.pdata, CD_MPOLY, CD_ASSIGN, tmp.mpoly, tmp.totpoly);
417         }
418
419         /* object had got displacement layer, should copy this layer to save sculpted data */
420         /* NOTE: maybe some other layers should be copied? nazgul */
421         if(CustomData_has_layer(&me->ldata, CD_MDISPS)) {
422                 if (totloop == me->totloop) {
423                         MDisps *mdisps = CustomData_get_layer(&me->ldata, CD_MDISPS);
424                         CustomData_add_layer(&tmp.ldata, CD_MDISPS, CD_DUPLICATE, mdisps, totloop);
425                 }
426         }
427
428         /* yes, must be before _and_ after tesselate */
429         mesh_update_customdata_pointers(&tmp, TRUE);
430
431         tmp.totface = mesh_recalcTesselation(&tmp.fdata, &tmp.ldata, &tmp.pdata, tmp.mvert, tmp.totface, tmp.totloop, tmp.totpoly);
432
433         mesh_update_customdata_pointers(&tmp, TRUE);
434
435
436         CustomData_free(&me->vdata, me->totvert);
437         CustomData_free(&me->edata, me->totedge);
438         CustomData_free(&me->fdata, me->totface);
439         CustomData_free(&me->ldata, me->totloop);
440         CustomData_free(&me->pdata, me->totpoly);
441
442         /*  ok, this should now use new CD shapekey data,
443             which shouuld be fed through the modifier 
444                 stack*/
445         if(tmp.totvert != me->totvert && !did_shapekeys && me->key) {
446                 printf("YEEK! this should be recoded! Shape key loss!!!\n");
447                 if(tmp.key) tmp.key->id.us--;
448                 tmp.key = NULL;
449         }
450
451         *me = tmp;
452 }
453
454 void DM_to_meshkey(DerivedMesh *dm, Mesh *me, KeyBlock *kb)
455 {
456         int a, totvert = dm->getNumVerts(dm);
457         float *fp;
458         MVert *mvert;
459         
460         if(totvert==0 || me->totvert==0 || me->totvert!=totvert) return;
461         
462         if(kb->data) MEM_freeN(kb->data);
463         kb->data= MEM_callocN(me->key->elemsize*me->totvert, "kb->data");
464         kb->totelem= totvert;
465         
466         fp= kb->data;
467         mvert=dm->getVertDataArray(dm, CD_MVERT);
468         
469         for(a=0; a<kb->totelem; a++, fp+=3, mvert++) {
470                 copy_v3_v3(fp, mvert->co);
471         }
472 }
473
474 void DM_set_only_copy(DerivedMesh *dm, CustomDataMask mask)
475 {
476         CustomData_set_only_copy(&dm->vertData, mask);
477         CustomData_set_only_copy(&dm->edgeData, mask);
478         CustomData_set_only_copy(&dm->faceData, mask);
479 }
480
481 void DM_add_vert_layer(DerivedMesh *dm, int type, int alloctype, void *layer)
482 {
483         CustomData_add_layer(&dm->vertData, type, alloctype, layer, dm->numVertData);
484 }
485
486 void DM_add_edge_layer(DerivedMesh *dm, int type, int alloctype, void *layer)
487 {
488         CustomData_add_layer(&dm->edgeData, type, alloctype, layer, dm->numEdgeData);
489 }
490
491 void DM_add_tessface_layer(DerivedMesh *dm, int type, int alloctype, void *layer)
492 {
493         CustomData_add_layer(&dm->faceData, type, alloctype, layer, dm->numTessFaceData);
494 }
495
496 void DM_add_loop_layer(DerivedMesh *dm, int type, int alloctype, void *layer)
497 {
498         CustomData_add_layer(&dm->loopData, type, alloctype, layer, dm->numLoopData);
499 }
500
501 void DM_add_poly_layer(DerivedMesh *dm, int type, int alloctype, void *layer)
502 {
503         CustomData_add_layer(&dm->polyData, type, alloctype, layer, dm->numPolyData);
504 }
505
506 void *DM_get_vert_data(DerivedMesh *dm, int index, int type)
507 {
508         return CustomData_get(&dm->vertData, index, type);
509 }
510
511 void *DM_get_edge_data(DerivedMesh *dm, int index, int type)
512 {
513         return CustomData_get(&dm->edgeData, index, type);
514 }
515
516 void *DM_get_tessface_data(DerivedMesh *dm, int index, int type)
517 {
518         return CustomData_get(&dm->faceData, index, type);
519 }
520
521 void *DM_get_vert_data_layer(DerivedMesh *dm, int type)
522 {
523         if(type == CD_MVERT)
524                 return dm->getVertArray(dm);
525
526         return CustomData_get_layer(&dm->vertData, type);
527 }
528
529 void *DM_get_edge_data_layer(DerivedMesh *dm, int type)
530 {
531         if(type == CD_MEDGE)
532                 return dm->getEdgeArray(dm);
533
534         return CustomData_get_layer(&dm->edgeData, type);
535 }
536
537 void *DM_get_tessface_data_layer(DerivedMesh *dm, int type)
538 {
539         if (type == CD_MFACE)
540                 return dm->getTessFaceArray(dm);
541
542         return CustomData_get_layer(&dm->faceData, type);
543 }
544
545 void *DM_get_poly_data_layer(DerivedMesh *dm, int type)
546 {
547         return CustomData_get_layer(&dm->polyData, type);
548 }
549
550 void DM_set_vert_data(DerivedMesh *dm, int index, int type, void *data)
551 {
552         CustomData_set(&dm->vertData, index, type, data);
553 }
554
555 void DM_set_edge_data(DerivedMesh *dm, int index, int type, void *data)
556 {
557         CustomData_set(&dm->edgeData, index, type, data);
558 }
559
560 void DM_set_tessface_data(DerivedMesh *dm, int index, int type, void *data)
561 {
562         CustomData_set(&dm->faceData, index, type, data);
563 }
564
565 void DM_copy_vert_data(DerivedMesh *source, DerivedMesh *dest,
566                                            int source_index, int dest_index, int count)
567 {
568         CustomData_copy_data(&source->vertData, &dest->vertData,
569                                                  source_index, dest_index, count);
570 }
571
572 void DM_copy_edge_data(DerivedMesh *source, DerivedMesh *dest,
573                                            int source_index, int dest_index, int count)
574 {
575         CustomData_copy_data(&source->edgeData, &dest->edgeData,
576                                                  source_index, dest_index, count);
577 }
578
579 void DM_copy_tessface_data(DerivedMesh *source, DerivedMesh *dest,
580                                            int source_index, int dest_index, int count)
581 {
582         CustomData_copy_data(&source->faceData, &dest->faceData,
583                                                  source_index, dest_index, count);
584 }
585
586 void DM_copy_loop_data(DerivedMesh *source, DerivedMesh *dest,
587                        int source_index, int dest_index, int count)
588 {
589         CustomData_copy_data(&source->loopData, &dest->loopData,
590                              source_index, dest_index, count);
591 }
592
593 void DM_copy_poly_data(DerivedMesh *source, DerivedMesh *dest,
594                        int source_index, int dest_index, int count)
595 {
596         CustomData_copy_data(&source->polyData, &dest->polyData,
597                              source_index, dest_index, count);
598 }
599
600 void DM_free_vert_data(struct DerivedMesh *dm, int index, int count)
601 {
602         CustomData_free_elem(&dm->vertData, index, count);
603 }
604
605 void DM_free_edge_data(struct DerivedMesh *dm, int index, int count)
606 {
607         CustomData_free_elem(&dm->edgeData, index, count);
608 }
609
610 void DM_free_tessface_data(struct DerivedMesh *dm, int index, int count)
611 {
612         CustomData_free_elem(&dm->faceData, index, count);
613 }
614
615 void DM_free_loop_data(struct DerivedMesh *dm, int index, int count)
616 {
617         CustomData_free_elem(&dm->loopData, index, count);
618 }
619
620 void DM_free_poly_data(struct DerivedMesh *dm, int index, int count)
621 {
622         CustomData_free_elem(&dm->polyData, index, count);
623 }
624
625 void DM_interp_vert_data(DerivedMesh *source, DerivedMesh *dest,
626                                                  int *src_indices, float *weights,
627                                                  int count, int dest_index)
628 {
629         CustomData_interp(&source->vertData, &dest->vertData, src_indices,
630                                           weights, NULL, count, dest_index);
631 }
632
633 void DM_interp_edge_data(DerivedMesh *source, DerivedMesh *dest,
634                                                  int *src_indices,
635                                                  float *weights, EdgeVertWeight *vert_weights,
636                                                  int count, int dest_index)
637 {
638         CustomData_interp(&source->edgeData, &dest->edgeData, src_indices,
639                                           weights, (float*)vert_weights, count, dest_index);
640 }
641
642 void DM_interp_tessface_data(DerivedMesh *source, DerivedMesh *dest,
643                                                  int *src_indices,
644                                                  float *weights, FaceVertWeight *vert_weights,
645                                                  int count, int dest_index)
646 {
647         CustomData_interp(&source->faceData, &dest->faceData, src_indices,
648                                           weights, (float*)vert_weights, count, dest_index);
649 }
650
651 void DM_swap_tessface_data(DerivedMesh *dm, int index, const int *corner_indices)
652 {
653         CustomData_swap(&dm->faceData, index, corner_indices);
654 }
655
656 void DM_interp_loop_data(DerivedMesh *source, DerivedMesh *dest,
657                          int *src_indices,
658                          float *weights, int count, int dest_index)
659 {
660         CustomData_interp(&source->loopData, &dest->loopData, src_indices,
661                           weights, NULL, count, dest_index);
662 }
663
664 void DM_interp_poly_data(DerivedMesh *source, DerivedMesh *dest,
665                          int *src_indices,
666                          float *weights, int count, int dest_index)
667 {
668         CustomData_interp(&source->polyData, &dest->polyData, src_indices,
669                           weights, NULL, count, dest_index);
670 }
671
672 ///
673 DerivedMesh *mesh_create_derived(Mesh *me, Object *ob, float (*vertCos)[3])
674 {
675         DerivedMesh *dm = CDDM_from_mesh(me, ob);
676         
677         if(!dm)
678                 return NULL;
679         
680         if (vertCos)
681                 CDDM_apply_vert_coords(dm, vertCos);
682
683         CDDM_calc_normals(dm);
684
685         return dm;
686 }
687
688 /***/
689
690 DerivedMesh *mesh_create_derived_for_modifier(Scene *scene, Object *ob, 
691         ModifierData *md, int build_shapekey_layers)
692 {
693         Mesh *me = ob->data;
694         ModifierTypeInfo *mti = modifierType_getInfo(md->type);
695         DerivedMesh *dm;
696
697         md->scene= scene;
698         
699         if (!(md->mode&eModifierMode_Realtime)) return NULL;
700         if (mti->isDisabled && mti->isDisabled(md, 0)) return NULL;
701         
702         if (build_shapekey_layers && me->key && ob->shapenr <= BLI_countlist(&me->key->block)) {
703                 key_to_mesh(BLI_findlink(&me->key->block, ob->shapenr-1), me);
704         }
705         
706         if (mti->type==eModifierTypeType_OnlyDeform) {
707                 int numVerts;
708                 float (*deformedVerts)[3] = mesh_getVertexCos(me, &numVerts);
709
710                 mti->deformVerts(md, ob, NULL, deformedVerts, numVerts, 0, 0);
711                 dm = mesh_create_derived(me, ob, deformedVerts);
712
713                 if (build_shapekey_layers)
714                         add_shapekey_layers(dm, me, ob);
715                 
716                 MEM_freeN(deformedVerts);
717         } else {
718                 DerivedMesh *tdm = mesh_create_derived(me, ob, NULL);
719
720                 if (build_shapekey_layers)
721                         add_shapekey_layers(tdm, me, ob);
722                 
723                 dm = mti->applyModifier(md, ob, tdm, 0, 0);
724
725                 if(tdm != dm) tdm->release(tdm);
726         }
727
728         return dm;
729 }
730
731 static float *get_editbmesh_orco_verts(BMEditMesh *em)
732 {
733         BMIter iter;
734         BMVert *eve;
735         float *orco;
736         int a, totvert;
737
738         /* these may not really be the orco's, but it's only for preview.
739          * could be solver better once, but isn't simple */
740
741         totvert= em->bm->totvert;
742         
743         orco = MEM_mallocN(sizeof(float)*3*totvert, "EditMesh Orco");
744
745         eve = BMIter_New(&iter, em->bm, BM_VERTS_OF_MESH, NULL);
746         for (a=0; eve; eve=BMIter_Step(&iter), a+=3) {
747                 copy_v3_v3(orco+a, eve->co);
748         }
749         
750         return orco;
751 }
752
753 /* orco custom data layer */
754 static void *get_orco_coords_dm(Object *ob, BMEditMesh *em, int layer, int *free)
755 {
756         *free= 0;
757
758         if(layer == CD_ORCO) {
759                 /* get original coordinates */
760                 *free= 1;
761
762                 if(em)
763                         return (float(*)[3])get_editbmesh_orco_verts(em);
764                 else
765                         return (float(*)[3])get_mesh_orco_verts(ob);
766         }
767         else if(layer == CD_CLOTH_ORCO) {
768                 /* apply shape key for cloth, this should really be solved
769                    by a more flexible customdata system, but not simple */
770                 if(!em) {
771                         ClothModifierData *clmd = (ClothModifierData *)modifiers_findByType(ob, eModifierType_Cloth);
772                         KeyBlock *kb= key_get_keyblock(ob_get_key(ob), clmd->sim_parms->shapekey_rest);
773
774                         if(kb->data)
775                                 return kb->data;
776                 }
777
778                 return NULL;
779         }
780
781         return NULL;
782 }
783
784 static DerivedMesh *create_orco_dm(Object *ob, Mesh *me, BMEditMesh *em, int layer)
785 {
786         DerivedMesh *dm;
787         float (*orco)[3];
788         int free;
789
790         if(em) dm= CDDM_from_BMEditMesh(em, me, 0);
791         else dm= CDDM_from_mesh(me, ob);
792
793         orco= get_orco_coords_dm(ob, em, layer, &free);
794
795         if(orco) {
796                 CDDM_apply_vert_coords(dm, orco);
797                 if(free) MEM_freeN(orco);
798         }
799
800         CDDM_calc_normals(dm);
801
802         return dm;
803 }
804
805 static void add_orco_dm(Object *ob, BMEditMesh *em, DerivedMesh *dm,
806                                                 DerivedMesh *orcodm, int layer)
807 {
808         float (*orco)[3], (*layerorco)[3];
809         int totvert, free;
810
811         totvert= dm->getNumVerts(dm);
812
813         if(orcodm) {
814                 orco= MEM_callocN(sizeof(float)*3*totvert, "dm orco");
815                 free= 1;
816
817                 if(orcodm->getNumVerts(orcodm) == totvert)
818                         orcodm->getVertCos(orcodm, orco);
819                 else
820                         dm->getVertCos(dm, orco);
821         }
822         else
823                 orco= get_orco_coords_dm(ob, em, layer, &free);
824
825         if(orco) {
826                 if(layer == CD_ORCO)
827                         transform_mesh_orco_verts(ob->data, orco, totvert, 0);
828
829                 if(!(layerorco = DM_get_vert_data_layer(dm, layer))) {
830                         DM_add_vert_layer(dm, layer, CD_CALLOC, NULL);
831                         layerorco = DM_get_vert_data_layer(dm, layer);
832                 }
833
834                 memcpy(layerorco, orco, sizeof(float)*3*totvert);
835                 if(free) MEM_freeN(orco);
836         }
837 }
838
839 /* weight paint colors */
840
841 /* Something of a hack, at the moment deal with weightpaint
842  * by tucking into colors during modifier eval, only in
843  * wpaint mode. Works ok but need to make sure recalc
844  * happens on enter/exit wpaint.
845  */
846
847 void weight_to_rgb(float r_rgb[3], const float weight)
848 {
849         const float blend= ((weight/2.0f)+0.5f);
850
851         if (weight<=0.25f){     // blue->cyan
852                 r_rgb[0]= 0.0f;
853                 r_rgb[1]= blend*weight*4.0f;
854                 r_rgb[2]= blend;
855         }
856         else if (weight<=0.50f){        // cyan->green
857                 r_rgb[0]= 0.0f;
858                 r_rgb[1]= blend;
859                 r_rgb[2]= blend*(1.0f-((weight-0.25f)*4.0f));
860         }
861         else if (weight <= 0.75f){      // green->yellow
862                 r_rgb[0]= blend * ((weight-0.50f)*4.0f);
863                 r_rgb[1]= blend;
864                 r_rgb[2]= 0.0f;
865         }
866         else if (weight <= 1.0f){ // yellow->red
867                 r_rgb[0]= blend;
868                 r_rgb[1]= blend * (1.0f-((weight-0.75f)*4.0f));
869                 r_rgb[2]= 0.0f;
870         }
871         else {
872                 /* exceptional value, unclamped or nan,
873                  * avoid uninitialized memory use */
874                 r_rgb[0]= 1.0f;
875                 r_rgb[1]= 0.0f;
876                 r_rgb[2]= 1.0f;
877         }
878 }
879
880 /* draw_flag's for calc_weightpaint_vert_color */
881 enum {
882         CALC_WP_MULTIPAINT= (1<<0),
883         CALC_WP_AUTO_NORMALIZE= (1<<1)
884 };
885
886 void weightpaint_color(unsigned char r_col[4], ColorBand *coba, const float input)
887 {
888         float colf[4];
889
890         if(coba) do_colorband(coba, input, colf);
891         else     weight_to_rgb(colf, input);
892
893         r_col[3] = (unsigned char)(colf[0] * 255.0f);
894         r_col[2] = (unsigned char)(colf[1] * 255.0f);
895         r_col[1] = (unsigned char)(colf[2] * 255.0f);
896         r_col[0] = 255;
897 }
898
899
900 static void calc_weightpaint_vert_color(
901         unsigned char r_col[4],
902         MDeformVert *dv, ColorBand *coba,
903         const int defbase_tot, const int defbase_act,
904         const char *dg_flags,
905         const int selected, const int draw_flag)
906 {
907         float input = 0.0f;
908         
909         int make_black= FALSE;
910
911         if ((selected > 1) && (draw_flag & CALC_WP_MULTIPAINT)) {
912                 int was_a_nonzero= FALSE;
913                 int i;
914
915                 MDeformWeight *dw= dv->dw;
916                 for (i = dv->totweight; i > 0; i--, dw++) {
917                         /* in multipaint, get the average if auto normalize is inactive
918                          * get the sum if it is active */
919                         if (dw->def_nr < defbase_tot) {
920                                 if (dg_flags[dw->def_nr]) {
921                                         if (dw->weight) {
922                                                 input += dw->weight;
923                                                 was_a_nonzero= TRUE;
924                                         }
925                                 }
926                         }
927                 }
928
929                 /* make it black if the selected groups have no weight on a vertex */
930                 if (was_a_nonzero == FALSE) {
931                         make_black = TRUE;
932                 }
933                 else if ((draw_flag & CALC_WP_AUTO_NORMALIZE) == FALSE) {
934                         input /= selected; /* get the average */
935                 }
936         }
937         else {
938                 /* default, non tricky behavior */
939                 input= defvert_find_weight(dv, defbase_act);
940         }
941
942         if (make_black) { /* TODO, theme color */
943                 r_col[3] = 0;
944                 r_col[2] = 0;
945                 r_col[1] = 0;
946                 r_col[0] = 255;
947         }
948         else {
949                 CLAMP(input, 0.0f, 1.0f);
950                 weightpaint_color(r_col, coba, input);
951         }
952 }
953
954 static ColorBand *stored_cb= NULL;
955
956 void vDM_ColorBand_store(ColorBand *coba)
957 {
958         stored_cb= coba;
959 }
960
961 static void add_weight_mcol_dm(Object *ob, DerivedMesh *dm, int const draw_flag)
962 {
963         Mesh *me = ob->data;
964         MFace *mf = dm->getTessFaceArray(dm);
965         MLoop *mloop = dm->getLoopArray(dm), *ml;
966         MPoly *mp = dm->getPolyArray(dm);
967         ColorBand *coba= stored_cb;     /* warning, not a local var */
968         unsigned char *wtcol;
969         unsigned char(*wlcol)[4] = NULL;
970         BLI_array_declare(wlcol);
971         int i, j, totface=dm->getNumTessFaces(dm), totloop;
972         int *origIndex = dm->getVertDataArray(dm, CD_ORIGINDEX);
973
974         int defbase_tot = BLI_countlist(&ob->defbase);
975         const int defbase_act = ob->actdef-1;
976         char *dg_flags = MEM_mallocN(defbase_tot * sizeof(char), __func__);
977         int selected = get_selected_defgroups(ob, dg_flags, defbase_tot);
978
979         wtcol = MEM_callocN (sizeof (unsigned char) * totface*4*4, "weightmap");
980
981         if (me->dvert) {
982                 MDeformVert *dvert= me->dvert;
983                 /*first add colors to the tesselation faces*/
984                 memset(wtcol, 0x55, sizeof (unsigned char) * totface*4*4);
985                 for (i=0; i<totface; i++, mf++) {
986                         /*origindex being NULL means we're operating on original mesh data*/
987                         unsigned int fidx= mf->v4 ? 3:2;
988                         do {
989                                 calc_weightpaint_vert_color(&wtcol[(i*4 + fidx)*4],
990                                                             &dvert[*(&mf->v1 + fidx)], coba,
991                                                             defbase_tot, defbase_act,
992                                                             dg_flags, selected, draw_flag);
993                         } while (fidx--);
994                 }
995         }
996         else {
997                 /* no weights, fill in zero */
998                 int col_i;
999                 weightpaint_color((unsigned char *)&col_i, coba, 0.0f);
1000                 fill_vn_i((int *)wtcol, totface*4, col_i);
1001         }
1002         
1003         CustomData_add_layer(&dm->faceData, CD_WEIGHT_MCOL, CD_ASSIGN, wtcol, totface);
1004
1005         /*now add to loops, so the data can be passed through the modifier stack*/
1006         totloop = 0;
1007         for (i=0; i<dm->numPolyData; i++, mp++) {
1008                 MDeformVert *dvert= me->dvert;
1009
1010                 ml = mloop + mp->loopstart;
1011
1012                 for (j=0; j<mp->totloop; j++, ml++, totloop++) {
1013                         BLI_array_growone(wlcol);
1014
1015                         calc_weightpaint_vert_color((unsigned char *)&wlcol[totloop],
1016                                                     &dvert[origIndex ? origIndex[ml->v] : ml->v], coba,
1017                                                     defbase_tot, defbase_act,
1018                                                                                 dg_flags, selected, draw_flag);
1019                 }
1020         }
1021
1022         MEM_freeN(dg_flags);
1023
1024         CustomData_add_layer(&dm->loopData, CD_WEIGHT_MLOOPCOL, CD_ASSIGN, wlcol, totloop);
1025 }
1026
1027
1028 static void shapekey_layers_to_keyblocks(DerivedMesh *dm, Mesh *me, int actshape_uid)
1029 {
1030         KeyBlock *kb;
1031         int i, j, tot;
1032         
1033         if (!me->key)
1034                 return; 
1035         
1036         tot = CustomData_number_of_layers(&dm->vertData, CD_SHAPEKEY);
1037         for (i=0; i<tot; i++) {
1038                 CustomDataLayer *layer = &dm->vertData.layers[CustomData_get_layer_index_n(&dm->vertData, CD_SHAPEKEY, i)];
1039                 float (*cos)[3], (*kbcos)[3];
1040                 
1041                 for (kb=me->key->block.first; kb; kb=kb->next) {
1042                         if (kb->uid == layer->uid)
1043                                 break;
1044                 }
1045                 
1046                 if (!kb) {
1047                         kb = add_keyblock(me->key, layer->name);
1048                         kb->uid = layer->uid;
1049                 }
1050                 
1051                 if (kb->data)
1052                         MEM_freeN(kb->data);
1053                 
1054                 cos = CustomData_get_layer_n(&dm->vertData, CD_SHAPEKEY, i);
1055                 kb->totelem = dm->numVertData;
1056
1057                 kb->data = kbcos = MEM_mallocN(sizeof(float)*3*kb->totelem, "kbcos DerivedMesh.c");
1058                 if (kb->uid == actshape_uid) {
1059                         MVert *mvert = dm->getVertArray(dm);
1060                         
1061                         for (j=0; j<dm->numVertData; j++, kbcos++, mvert++) {
1062                                 copy_v3_v3(*kbcos, mvert->co);
1063                         }
1064                 } else {
1065                         for (j=0; j<kb->totelem; j++, cos++, kbcos++) {
1066                                 copy_v3_v3(*kbcos, *cos);
1067                         }
1068                 }
1069         }
1070         
1071         for (kb=me->key->block.first; kb; kb=kb->next) {
1072                 if (kb->totelem != dm->numVertData) {
1073                         if (kb->data)
1074                                 MEM_freeN(kb->data);
1075                         
1076                         kb->totelem = dm->numVertData;
1077                         kb->data = MEM_callocN(sizeof(float)*3*kb->totelem, "kb->data derivedmesh.c");
1078                         fprintf(stderr, "%s: lost a shapekey layer! (bmesh internal error)\n", __func__);
1079                 }
1080         }
1081 }
1082
1083 static void add_shapekey_layers(DerivedMesh *dm, Mesh *me, Object *UNUSED(ob))
1084 {
1085         KeyBlock *kb;
1086         Key *key = me->key;
1087         int a, b;
1088         
1089         if (!me->key)
1090                 return;
1091         
1092         if (dm->numVertData != me->totvert) {
1093                 printf("error in add_shapekey_layers: dm isn't the same size as me\n");
1094                 return;
1095         }
1096                 
1097         for (a=0, kb=key->block.first; kb; kb=kb->next, a++) {
1098                 float (*cos)[3] = CustomData_add_layer_named(&dm->vertData, CD_SHAPEKEY, CD_CALLOC, NULL, dm->numVertData, kb->name);
1099                 int ci = CustomData_get_layer_index_n(&dm->vertData, CD_SHAPEKEY, a);
1100                 
1101                 dm->vertData.layers[ci].uid = kb->uid;
1102                 if (kb->totelem != dm->numVertData) {
1103                         printf("error in add_shapekey_layers: totelem and totvert don't match");
1104                         continue;
1105                 }
1106                 
1107                 for (b=0; b<kb->totelem; b++, cos++) {
1108                         copy_v3_v3((float *)cos, ((float*)kb->data)+b*3);
1109                 }
1110         }
1111 }
1112
1113 /* new value for useDeform -1  (hack for the gameengine):
1114  * - apply only the modifier stack of the object, skipping the virtual modifiers,
1115  * - don't apply the key
1116  * - apply deform modifiers and input vertexco
1117  */
1118 static void mesh_calc_modifiers(Scene *scene, Object *ob, float (*inputVertexCos)[3],
1119                                                                 DerivedMesh **deform_r, DerivedMesh **final_r,
1120                                                                 int useRenderParams, int useDeform,
1121                                                                 int needMapping, CustomDataMask dataMask, 
1122                                                                 int index, int useCache, int build_shapekey_layers)
1123 {
1124         Mesh *me = ob->data;
1125         ModifierData *firstmd, *md;
1126         LinkNode *datamasks, *curr;
1127         CustomDataMask mask, nextmask, append_mask = 0;
1128         float (*deformedVerts)[3] = NULL;
1129         DerivedMesh *dm=NULL, *orcodm, *clothorcodm, *finaldm;
1130         int numVerts = me->totvert;
1131         int required_mode;
1132         int isPrevDeform= FALSE;
1133         int skipVirtualArmature = (useDeform < 0);
1134         MultiresModifierData *mmd= get_multires_modifier(scene, ob, 0);
1135         int has_multires = mmd != NULL, multires_applied = 0;
1136         int sculpt_mode = ob->mode & OB_MODE_SCULPT && ob->sculpt;
1137
1138         int draw_flag= ((scene->toolsettings->multipaint ? CALC_WP_MULTIPAINT : 0) |
1139                         (scene->toolsettings->auto_normalize ? CALC_WP_AUTO_NORMALIZE : 0));
1140
1141         if(mmd && !mmd->sculptlvl)
1142                 has_multires = 0;
1143
1144         if(!skipVirtualArmature) {
1145                 firstmd = modifiers_getVirtualModifierList(ob);
1146         }
1147         else {
1148                 /* game engine exception */
1149                 firstmd = ob->modifiers.first;
1150                 if(firstmd && firstmd->type == eModifierType_Armature)
1151                         firstmd = firstmd->next;
1152         }
1153
1154         md = firstmd;
1155
1156         modifiers_clearErrors(ob);
1157
1158         if(useRenderParams) required_mode = eModifierMode_Render;
1159         else required_mode = eModifierMode_Realtime;
1160
1161         datamasks = modifiers_calcDataMasks(scene, ob, md, dataMask, required_mode);
1162         curr = datamasks;
1163
1164         if(deform_r) *deform_r = NULL;
1165         *final_r = NULL;
1166
1167         if(useDeform) {
1168                 if(inputVertexCos)
1169                         deformedVerts = inputVertexCos;
1170                 
1171                 /* Apply all leading deforming modifiers */
1172                 for(;md; md = md->next, curr = curr->next) {
1173                         ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1174
1175                         md->scene= scene;
1176                         
1177                         if(!modifier_isEnabled(scene, md, required_mode)) continue;
1178                         if(useDeform < 0 && mti->dependsOnTime && mti->dependsOnTime(md)) continue;
1179
1180                         if(mti->type == eModifierTypeType_OnlyDeform) {
1181                                 if(!deformedVerts)
1182                                         deformedVerts = mesh_getVertexCos(me, &numVerts);
1183
1184                                 mti->deformVerts(md, ob, NULL, deformedVerts, numVerts, useRenderParams, useDeform);
1185                         } else {
1186                                 break;
1187                         }
1188                         
1189                         /* grab modifiers until index i */
1190                         if((index >= 0) && (modifiers_indexInObject(ob, md) >= index))
1191                                 break;
1192                 }
1193
1194                 /* Result of all leading deforming modifiers is cached for
1195                  * places that wish to use the original mesh but with deformed
1196                  * coordinates (vpaint, etc.)
1197                  */
1198                 if (deform_r) {
1199                         *deform_r = CDDM_from_mesh(me, ob);
1200                          
1201                         if (build_shapekey_layers)
1202                                 add_shapekey_layers(dm, me, ob);
1203                         
1204                         if(deformedVerts) {
1205                                 CDDM_apply_vert_coords(*deform_r, deformedVerts);
1206                                 CDDM_calc_normals(*deform_r);
1207                         }
1208                 }
1209         } else {
1210                 /* default behaviour for meshes */
1211                 if(inputVertexCos)
1212                         deformedVerts = inputVertexCos;
1213                 else
1214                         deformedVerts = mesh_getVertexCos(me, &numVerts);
1215         }
1216
1217
1218         /* Now apply all remaining modifiers. If useDeform is off then skip
1219          * OnlyDeform ones. 
1220          */
1221         dm = NULL;
1222         orcodm = NULL;
1223         clothorcodm = NULL;
1224
1225         for(;md; md = md->next, curr = curr->next) {
1226                 ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1227
1228                 md->scene= scene;
1229
1230                 if(!modifier_isEnabled(scene, md, required_mode)) continue;
1231                 if(mti->type == eModifierTypeType_OnlyDeform && !useDeform) continue;
1232                 if((mti->flags & eModifierTypeFlag_RequiresOriginalData) && dm) {
1233                         modifier_setError(md, "Modifier requires original data, bad stack position.");
1234                         continue;
1235                 }
1236                 if(sculpt_mode && (!has_multires || multires_applied)) {
1237                         int unsupported= 0;
1238
1239                         if(scene->toolsettings->sculpt->flags & SCULPT_ONLY_DEFORM)
1240                                 unsupported|= mti->type != eModifierTypeType_OnlyDeform;
1241
1242                         unsupported|= md->type == eModifierType_Multires && ((MultiresModifierData*)md)->sculptlvl==0;
1243                         unsupported|= multires_applied;
1244
1245                         if(unsupported) {
1246                                 modifier_setError(md, "Not supported in sculpt mode.");
1247                                 continue;
1248                         }
1249                 }
1250                 if(needMapping && !modifier_supportsMapping(md)) continue;
1251                 if(useDeform < 0 && mti->dependsOnTime && mti->dependsOnTime(md)) continue;
1252
1253                 /* add an orco layer if needed by this modifier */
1254                 if(mti->requiredDataMask)
1255                         mask = mti->requiredDataMask(ob, md);
1256                 else
1257                         mask = 0;
1258
1259                 if(dm && (mask & CD_MASK_ORCO))
1260                         add_orco_dm(ob, NULL, dm, orcodm, CD_ORCO);
1261
1262                 /* How to apply modifier depends on (a) what we already have as
1263                  * a result of previous modifiers (could be a DerivedMesh or just
1264                  * deformed vertices) and (b) what type the modifier is.
1265                  */
1266
1267                 if(mti->type == eModifierTypeType_OnlyDeform) {
1268                         /* No existing verts to deform, need to build them. */
1269                         if(!deformedVerts) {
1270                                 if(dm) {
1271                                         /* Deforming a derived mesh, read the vertex locations
1272                                          * out of the mesh and deform them. Once done with this
1273                                          * run of deformers verts will be written back.
1274                                          */
1275                                         numVerts = dm->getNumVerts(dm);
1276                                         deformedVerts =
1277                                                 MEM_mallocN(sizeof(*deformedVerts) * numVerts, "dfmv");
1278                                         dm->getVertCos(dm, deformedVerts);
1279                                 } else {
1280                                         deformedVerts = mesh_getVertexCos(me, &numVerts);
1281                                 }
1282                         }
1283
1284                         /* if this is not the last modifier in the stack then recalculate the normals
1285                          * to avoid giving bogus normals to the next modifier see: [#23673] */
1286                         if(dm && isPrevDeform &&  mti->dependsOnNormals && mti->dependsOnNormals(md)) {
1287                                 /* XXX, this covers bug #23673, but we may need normal calc for other types */
1288                                 if(dm && dm->type == DM_TYPE_CDDM) {
1289                                         CDDM_apply_vert_coords(dm, deformedVerts);
1290                                         CDDM_calc_normals(dm);
1291                                 }
1292                         }
1293
1294                         mti->deformVerts(md, ob, dm, deformedVerts, numVerts, useRenderParams, useDeform);
1295                 } else {
1296                         DerivedMesh *ndm;
1297
1298                         /* determine which data layers are needed by following modifiers */
1299                         if(curr->next)
1300                                 nextmask= (CustomDataMask)GET_INT_FROM_POINTER(curr->next->link);
1301                         else
1302                                 nextmask= dataMask;
1303
1304                         /* apply vertex coordinates or build a DerivedMesh as necessary */
1305                         if(dm) {
1306                                 if(deformedVerts) {
1307                                         DerivedMesh *tdm = CDDM_copy(dm, 0);
1308                                         dm->release(dm);
1309                                         dm = tdm;
1310
1311                                         CDDM_apply_vert_coords(dm, deformedVerts);
1312                                         CDDM_calc_normals(dm);
1313                                 }
1314                         } else {
1315                                 dm = CDDM_from_mesh(me, ob);
1316
1317                                 if (build_shapekey_layers)
1318                                         add_shapekey_layers(dm, me, ob);
1319
1320                                 if(deformedVerts) {
1321                                         CDDM_apply_vert_coords(dm, deformedVerts);
1322                                         CDDM_calc_normals(dm);
1323                                 }
1324
1325                                 /* Constructive modifiers need to have an origindex
1326                                  * otherwise they wont have anywhere to copy the data from.
1327                                  *
1328                                  * Also create ORIGINDEX data if any of the following modifiers
1329                                  * requests it, this way Mirror, Solidify etc will keep ORIGINDEX
1330                                  * data by using generic DM_copy_vert_data() functions.
1331                                  */
1332                                 if(needMapping || (nextmask & CD_MASK_ORIGINDEX)) {
1333                                         /* calc */
1334                                         DM_add_vert_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
1335                                         DM_add_edge_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
1336                                         DM_add_poly_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
1337
1338                                         range_vn_i(DM_get_vert_data_layer(dm, CD_ORIGINDEX), dm->numVertData, 0);
1339                                         range_vn_i(DM_get_edge_data_layer(dm, CD_ORIGINDEX), dm->numEdgeData, 0);
1340                                         range_vn_i(DM_get_poly_data_layer(dm, CD_ORIGINDEX), dm->numPolyData, 0);
1341                                 }
1342
1343                                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
1344                                         add_weight_mcol_dm(ob, dm, draw_flag);
1345
1346                         }
1347
1348                         
1349                         /* set the DerivedMesh to only copy needed data */
1350                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link);
1351                         /* needMapping check here fixes bug [#28112], otherwise its
1352                          * possible that it wont be copied */
1353                         mask |= append_mask;
1354                         DM_set_only_copy(dm, mask | (needMapping ? CD_MASK_ORIGINDEX : 0));
1355                         
1356                         /* add cloth rest shape key if need */
1357                         if(mask & CD_MASK_CLOTH_ORCO)
1358                                 add_orco_dm(ob, NULL, dm, clothorcodm, CD_CLOTH_ORCO);
1359
1360                         /* add an origspace layer if needed */
1361                         if(((CustomDataMask)GET_INT_FROM_POINTER(curr->link)) & CD_MASK_ORIGSPACE)
1362                                 if(!CustomData_has_layer(&dm->faceData, CD_ORIGSPACE))
1363                                         DM_add_tessface_layer(dm, CD_ORIGSPACE, CD_DEFAULT, NULL);
1364
1365                         ndm = mti->applyModifier(md, ob, dm, useRenderParams, useCache);
1366
1367                         if(ndm) {
1368                                 /* if the modifier returned a new dm, release the old one */
1369                                 if(dm && dm != ndm) dm->release(dm);
1370
1371                                 dm = ndm;
1372
1373                                 if(deformedVerts) {
1374                                         if(deformedVerts != inputVertexCos)
1375                                                 MEM_freeN(deformedVerts);
1376
1377                                         deformedVerts = NULL;
1378                                 }
1379                         } 
1380
1381                         /* create an orco derivedmesh in parallel */
1382                         if(nextmask & CD_MASK_ORCO) {
1383                                 if(!orcodm)
1384                                         orcodm= create_orco_dm(ob, me, NULL, CD_ORCO);
1385
1386                                 nextmask &= ~CD_MASK_ORCO;
1387                                 DM_set_only_copy(orcodm, nextmask | CD_MASK_ORIGINDEX);
1388                                 ndm = mti->applyModifier(md, ob, orcodm, useRenderParams, 0);
1389
1390                                 if(ndm) {
1391                                         /* if the modifier returned a new dm, release the old one */
1392                                         if(orcodm && orcodm != ndm) orcodm->release(orcodm);
1393                                         orcodm = ndm;
1394                                 }
1395                         }
1396
1397                         /* create cloth orco derivedmesh in parallel */
1398                         if(nextmask & CD_MASK_CLOTH_ORCO) {
1399                                 if(!clothorcodm)
1400                                         clothorcodm= create_orco_dm(ob, me, NULL, CD_CLOTH_ORCO);
1401
1402                                 nextmask &= ~CD_MASK_CLOTH_ORCO;
1403                                 DM_set_only_copy(clothorcodm, nextmask | CD_MASK_ORIGINDEX);
1404                                 ndm = mti->applyModifier(md, ob, clothorcodm, useRenderParams, 0);
1405
1406                                 if(ndm) {
1407                                         /* if the modifier returned a new dm, release the old one */
1408                                         if(clothorcodm && clothorcodm != ndm) clothorcodm->release(clothorcodm);
1409                                         clothorcodm = ndm;
1410                                 }
1411                         }
1412
1413                         /* in case of dynamic paint, make sure preview mask remains for following modifiers */
1414                         if (md->type == eModifierType_DynamicPaint)
1415                                 append_mask |= CD_MASK_WEIGHT_MCOL;
1416                 }
1417
1418                 isPrevDeform= (mti->type == eModifierTypeType_OnlyDeform);
1419
1420                 /* grab modifiers until index i */
1421                 if((index >= 0) && (modifiers_indexInObject(ob, md) >= index))
1422                         break;
1423
1424                 if(sculpt_mode && md->type == eModifierType_Multires)
1425                         multires_applied = 1;
1426         }
1427
1428         for(md=firstmd; md; md=md->next)
1429                 modifier_freeTemporaryData(md);
1430
1431         /* Yay, we are done. If we have a DerivedMesh and deformed vertices
1432          * need to apply these back onto the DerivedMesh. If we have no
1433          * DerivedMesh then we need to build one.
1434          */
1435         if(dm && deformedVerts) {
1436                 finaldm = CDDM_copy(dm, 0);
1437
1438                 dm->release(dm);
1439
1440                 CDDM_apply_vert_coords(finaldm, deformedVerts);
1441
1442                 CDDM_calc_normals(finaldm);
1443
1444                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
1445                         add_weight_mcol_dm(ob, finaldm, draw_flag);
1446
1447         } else if(dm) {
1448                 finaldm = dm;
1449         } else {
1450                 int recalc_normals= 0;
1451
1452                 finaldm = CDDM_from_mesh(me, ob);
1453                 
1454                 if(build_shapekey_layers) {
1455                         add_shapekey_layers(finaldm, me, ob);
1456                         recalc_normals= 1;
1457                 }
1458                 
1459                 if(deformedVerts) {
1460                         CDDM_apply_vert_coords(finaldm, deformedVerts);
1461                         recalc_normals= 1;
1462                 }
1463
1464                 if(recalc_normals)
1465                         CDDM_calc_normals(finaldm);
1466                 
1467                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
1468                         add_weight_mcol_dm(ob, finaldm, draw_flag);
1469         }
1470
1471         /* add an orco layer if needed */
1472         if(dataMask & CD_MASK_ORCO) {
1473                 add_orco_dm(ob, NULL, finaldm, orcodm, CD_ORCO);
1474
1475                 if(deform_r && *deform_r)
1476                         add_orco_dm(ob, NULL, *deform_r, NULL, CD_ORCO);
1477         }
1478
1479 #ifdef WITH_GAMEENGINE
1480         /* NavMesh - this is a hack but saves having a NavMesh modifier */
1481         if ((ob->gameflag & OB_NAVMESH) && (finaldm->type == DM_TYPE_CDDM)) {
1482                 DerivedMesh *tdm;
1483                 tdm= navmesh_dm_createNavMeshForVisualization(finaldm);
1484                 if (finaldm != tdm) {
1485                         finaldm->release(finaldm);
1486                         finaldm= tdm;
1487                 }
1488         }
1489 #endif /* WITH_GAMEENGINE */
1490
1491
1492         /* --------------------------------------------------------------------- */
1493         /* Re-tesselation is necessary to push render data (uvs, textures, colors)
1494          * from loops and polys onto the tessfaces. This may be currently be
1495          * redundantin cases where the render mode doesn't use these inputs, but
1496          * ideally eventually tesselation would happen on-demand, and this is one
1497          * of the primary places it would be needed. */
1498         finaldm->recalcTesselation(finaldm);
1499         /* if we have no modifiers applied we'lll still want the tessface normals
1500          * to be calculated from the polygon noramals,
1501          * 'CDDM_calc_normals' checks for this case - campbell */
1502         finaldm->calcNormals(finaldm);
1503         /* Need to watch this, it can cause issues, see bug [#29338]             */
1504         /* take care with this block, we really need testing frameworks          */
1505         /* --------------------------------------------------------------------- */
1506
1507
1508         *final_r = finaldm;
1509
1510         if(orcodm)
1511                 orcodm->release(orcodm);
1512         if(clothorcodm)
1513                 clothorcodm->release(clothorcodm);
1514
1515         if(deformedVerts && deformedVerts != inputVertexCos)
1516                 MEM_freeN(deformedVerts);
1517
1518         BLI_linklist_free(datamasks, NULL);
1519 }
1520
1521 float (*editbmesh_get_vertex_cos(BMEditMesh *em, int *numVerts_r))[3]
1522 {
1523         int i, numVerts = *numVerts_r = em->bm->totvert;
1524         float (*cos)[3];
1525         BMIter iter;
1526         BMVert *eve;
1527
1528         cos = MEM_mallocN(sizeof(float)*3*numVerts, "vertexcos");
1529
1530         eve = BMIter_New(&iter, em->bm, BM_VERTS_OF_MESH, NULL);
1531         for (i=0; eve; eve=BMIter_Step(&iter), i++) {
1532                 copy_v3_v3(cos[i], eve->co);
1533         }
1534
1535         return cos;
1536 }
1537
1538 int editbmesh_modifier_is_enabled(Scene *scene, ModifierData *md, DerivedMesh *dm)
1539 {
1540         ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1541         int required_mode = eModifierMode_Realtime | eModifierMode_Editmode;
1542
1543         if(!modifier_isEnabled(scene, md, required_mode)) return 0;
1544         if((mti->flags & eModifierTypeFlag_RequiresOriginalData) && dm) {
1545                 modifier_setError(md, "Modifier requires original data, bad stack position.");
1546                 return 0;
1547         }
1548         
1549         return 1;
1550 }
1551
1552 static void editbmesh_calc_modifiers(Scene *scene, Object *ob, BMEditMesh *em, DerivedMesh **cage_r,
1553                                                                         DerivedMesh **final_r,
1554                                                                         CustomDataMask dataMask)
1555 {
1556         ModifierData *md;
1557         float (*deformedVerts)[3] = NULL;
1558         CustomDataMask mask;
1559         DerivedMesh *dm = NULL, *orcodm = NULL, *finaldm = NULL;
1560         int i, numVerts = 0, cageIndex = modifiers_getCageIndex(scene, ob, NULL, 1);
1561         LinkNode *datamasks, *curr;
1562         int required_mode = eModifierMode_Realtime | eModifierMode_Editmode;
1563
1564         modifiers_clearErrors(ob);
1565
1566         if(cage_r && cageIndex == -1) {
1567                 *cage_r = getEditDerivedBMesh(em, ob, NULL);
1568         }
1569
1570         md = modifiers_getVirtualModifierList(ob);
1571
1572         datamasks = modifiers_calcDataMasks(scene, ob, md, dataMask, required_mode);
1573
1574         curr = datamasks;
1575         for(i = 0; md; i++, md = md->next, curr = curr->next) {
1576                 ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1577
1578                 md->scene= scene;
1579                 
1580                 if(!editbmesh_modifier_is_enabled(scene, md, dm))
1581                         continue;
1582
1583                 /* add an orco layer if needed by this modifier */
1584                 if(dm && mti->requiredDataMask) {
1585                         mask = mti->requiredDataMask(ob, md);
1586                         if(mask & CD_MASK_ORCO)
1587                                 add_orco_dm(ob, em, dm, orcodm, CD_ORCO);
1588                 }
1589
1590                 /* How to apply modifier depends on (a) what we already have as
1591                  * a result of previous modifiers (could be a DerivedMesh or just
1592                  * deformed vertices) and (b) what type the modifier is.
1593                  */
1594
1595                 if(mti->type == eModifierTypeType_OnlyDeform) {
1596                         /* No existing verts to deform, need to build them. */
1597                         if(!deformedVerts) {
1598                                 if(dm) {
1599                                         /* Deforming a derived mesh, read the vertex locations
1600                                          * out of the mesh and deform them. Once done with this
1601                                          * run of deformers verts will be written back.
1602                                          */
1603                                         numVerts = dm->getNumVerts(dm);
1604                                         deformedVerts =
1605                                                 MEM_mallocN(sizeof(*deformedVerts) * numVerts, "dfmv");
1606                                         dm->getVertCos(dm, deformedVerts);
1607                                 } else {
1608                                         deformedVerts = editbmesh_get_vertex_cos(em, &numVerts);
1609                                 }
1610                         }
1611
1612                         if (mti->deformVertsEM)
1613                                 mti->deformVertsEM(md, ob, em, dm, deformedVerts, numVerts);
1614                         else mti->deformVerts(md, ob, dm, deformedVerts, numVerts, 0, 0);
1615                 } else {
1616                         DerivedMesh *ndm;
1617
1618                         /* apply vertex coordinates or build a DerivedMesh as necessary */
1619                         if(dm) {
1620                                 if(deformedVerts) {
1621                                         DerivedMesh *tdm = CDDM_copy(dm, 0);
1622                                         if(!(cage_r && dm == *cage_r)) dm->release(dm);
1623                                         dm = tdm;
1624
1625                                         CDDM_apply_vert_coords(dm, deformedVerts);
1626                                         CDDM_calc_normals(dm);
1627                                 } else if(cage_r && dm == *cage_r) {
1628                                         /* dm may be changed by this modifier, so we need to copy it
1629                                          */
1630                                         dm = CDDM_copy(dm, 0);
1631                                 }
1632
1633                         } else {
1634                                 dm = CDDM_from_BMEditMesh(em, ob->data, 0);
1635
1636                                 if(deformedVerts) {
1637                                         CDDM_apply_vert_coords(dm, deformedVerts);
1638                                         CDDM_calc_normals(dm);
1639                                 }
1640                         }
1641
1642                         /* create an orco derivedmesh in parallel */
1643                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link);
1644                         if(mask & CD_MASK_ORCO) {
1645                                 if(!orcodm)
1646                                         orcodm= create_orco_dm(ob, ob->data, em, CD_ORCO);
1647
1648                                 mask &= ~CD_MASK_ORCO;
1649                                 DM_set_only_copy(orcodm, mask | CD_MASK_ORIGINDEX);
1650
1651                                 if (mti->applyModifierEM)
1652                                         ndm = mti->applyModifierEM(md, ob, em, orcodm);
1653                                 else
1654                                         ndm = mti->applyModifier(md, ob, orcodm, 0, 0);
1655
1656                                 if(ndm) {
1657                                         /* if the modifier returned a new dm, release the old one */
1658                                         if(orcodm && orcodm != ndm) orcodm->release(orcodm);
1659                                         orcodm = ndm;
1660                                 }
1661                         }
1662
1663                         /* set the DerivedMesh to only copy needed data */
1664                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link); /* CD_MASK_ORCO may have been cleared above */
1665
1666                         DM_set_only_copy(dm, mask | CD_MASK_ORIGINDEX);
1667
1668                         if(mask & CD_MASK_ORIGSPACE)
1669                                 if(!CustomData_has_layer(&dm->faceData, CD_ORIGSPACE))
1670                                         DM_add_tessface_layer(dm, CD_ORIGSPACE, CD_DEFAULT, NULL);
1671                         
1672                         if (mti->applyModifierEM)
1673                                 ndm = mti->applyModifierEM(md, ob, em, dm);
1674                         else
1675                                 ndm = mti->applyModifier(md, ob, dm, 0, 0);
1676
1677                         if (ndm) {
1678                                 if(dm && dm != ndm)
1679                                         dm->release(dm);
1680
1681                                 dm = ndm;
1682
1683                                 if (deformedVerts) {
1684                                         MEM_freeN(deformedVerts);
1685                                         deformedVerts = NULL;
1686                                 }
1687                         }
1688                 }
1689
1690                 if(cage_r && i == cageIndex) {
1691                         if(dm && deformedVerts) {
1692                                 *cage_r = CDDM_copy(dm, 0);
1693                                 CDDM_apply_vert_coords(*cage_r, deformedVerts);
1694                         } else if(dm) {
1695                                 *cage_r = dm;
1696                         } else {
1697                                 *cage_r =
1698                                         getEditDerivedBMesh(em, ob,
1699                                                 deformedVerts ? MEM_dupallocN(deformedVerts) : NULL);
1700                         }
1701                 }
1702         }
1703
1704         BLI_linklist_free(datamasks, NULL);
1705
1706         /* Yay, we are done. If we have a DerivedMesh and deformed vertices need
1707          * to apply these back onto the DerivedMesh. If we have no DerivedMesh
1708          * then we need to build one.
1709          */
1710         if(dm && deformedVerts) {
1711                 finaldm = CDDM_copy(dm, 0);
1712
1713                 if(!(cage_r && dm == *cage_r)) dm->release(dm);
1714
1715                 CDDM_apply_vert_coords(*final_r, deformedVerts);
1716         } else if (dm) {
1717                 finaldm = dm;
1718         } else if (!deformedVerts && cage_r && *cage_r) {
1719                 finaldm = *cage_r;
1720         } else {
1721                 finaldm = getEditDerivedBMesh(em, ob, deformedVerts);
1722                 deformedVerts = NULL;
1723         }
1724
1725         finaldm->calcNormals(finaldm);
1726
1727         *final_r = finaldm;
1728
1729         /* add an orco layer if needed */
1730         if(dataMask & CD_MASK_ORCO)
1731                 add_orco_dm(ob, em, *final_r, orcodm, CD_ORCO);
1732
1733         if(orcodm)
1734                 orcodm->release(orcodm);
1735
1736         if(deformedVerts)
1737                 MEM_freeN(deformedVerts);
1738 }
1739
1740 static void clear_mesh_caches(Object *ob)
1741 {
1742         Mesh *me= ob->data;
1743
1744                 /* also serves as signal to remake texspace */
1745         if (ob->bb) {
1746                 MEM_freeN(ob->bb);
1747                 ob->bb = NULL;
1748         }
1749         if (me->bb) {
1750                 MEM_freeN(me->bb);
1751                 me->bb = NULL;
1752         }
1753
1754         freedisplist(&ob->disp);
1755
1756         if (ob->derivedFinal) {
1757                 ob->derivedFinal->needsFree = 1;
1758                 ob->derivedFinal->release(ob->derivedFinal);
1759                 ob->derivedFinal= NULL;
1760         }
1761         if (ob->derivedDeform) {
1762                 ob->derivedDeform->needsFree = 1;
1763                 ob->derivedDeform->release(ob->derivedDeform);
1764                 ob->derivedDeform= NULL;
1765         }
1766
1767         if(ob->sculpt) {
1768                 object_sculpt_modifiers_changed(ob);
1769         }
1770 }
1771
1772 static void mesh_build_data(Scene *scene, Object *ob, CustomDataMask dataMask,
1773         int build_shapekey_layers)
1774 {
1775         Object *obact = scene->basact?scene->basact->object:NULL;
1776         int editing = paint_facesel_test(ob);
1777         /* weight paint and face select need original indices because of selection buffer drawing */
1778         int needMapping = (ob==obact) && (editing || (ob->mode & (OB_MODE_WEIGHT_PAINT|OB_MODE_VERTEX_PAINT|OB_MODE_TEXTURE_PAINT)));
1779
1780         clear_mesh_caches(ob);
1781
1782         mesh_calc_modifiers(scene, ob, NULL, &ob->derivedDeform,
1783                                                 &ob->derivedFinal, 0, 1,
1784                                                 needMapping, dataMask, -1, 1, build_shapekey_layers);
1785
1786         DM_set_object_boundbox (ob, ob->derivedFinal);
1787
1788         ob->derivedFinal->needsFree = 0;
1789         ob->derivedDeform->needsFree = 0;
1790         ob->lastDataMask = dataMask;
1791 }
1792
1793 static void editbmesh_build_data(Scene *scene, Object *obedit, BMEditMesh *em, CustomDataMask dataMask)
1794 {
1795         clear_mesh_caches(obedit);
1796
1797         if (em->derivedFinal) {
1798                 if (em->derivedFinal!=em->derivedCage) {
1799                         em->derivedFinal->needsFree = 1;
1800                         em->derivedFinal->release(em->derivedFinal);
1801                 }
1802                 em->derivedFinal = NULL;
1803         }
1804         if (em->derivedCage) {
1805                 em->derivedCage->needsFree = 1;
1806                 em->derivedCage->release(em->derivedCage);
1807                 em->derivedCage = NULL;
1808         }
1809
1810         editbmesh_calc_modifiers(scene, obedit, em, &em->derivedCage, &em->derivedFinal, dataMask);
1811         DM_set_object_boundbox (obedit, em->derivedFinal);
1812
1813         em->lastDataMask = dataMask;
1814         em->derivedFinal->needsFree = 0;
1815         em->derivedCage->needsFree = 0;
1816 }
1817
1818 void makeDerivedMesh(Scene *scene, Object *ob, BMEditMesh *em,
1819         CustomDataMask dataMask, int build_shapekey_layers)
1820 {
1821         if (em) {
1822                 editbmesh_build_data(scene, ob, em, dataMask);
1823         } else {
1824                 mesh_build_data(scene, ob, dataMask, build_shapekey_layers);
1825         }
1826 }
1827
1828 /***/
1829
1830 DerivedMesh *mesh_get_derived_final(Scene *scene, Object *ob, CustomDataMask dataMask)
1831 {
1832         /* if there's no derived mesh or the last data mask used doesn't include
1833          * the data we need, rebuild the derived mesh
1834          */
1835         if(!ob->derivedFinal || (dataMask & ob->lastDataMask) != dataMask)
1836                 mesh_build_data(scene, ob, dataMask, 0);
1837
1838         return ob->derivedFinal;
1839 }
1840
1841 DerivedMesh *mesh_get_derived_deform(Scene *scene, Object *ob, CustomDataMask dataMask)
1842 {
1843         /* if there's no derived mesh or the last data mask used doesn't include
1844          * the data we need, rebuild the derived mesh
1845          */
1846         if(!ob->derivedDeform || (dataMask & ob->lastDataMask) != dataMask)
1847                 mesh_build_data(scene, ob, dataMask, 0);
1848
1849         return ob->derivedDeform;
1850 }
1851
1852 DerivedMesh *mesh_create_derived_render(Scene *scene, Object *ob, CustomDataMask dataMask)
1853 {
1854         DerivedMesh *final;
1855         
1856         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 1, 1, 0, dataMask, -1, 0, 0);
1857
1858         return final;
1859 }
1860
1861 DerivedMesh *mesh_create_derived_index_render(Scene *scene, Object *ob, CustomDataMask dataMask, int index)
1862 {
1863         DerivedMesh *final;
1864         
1865         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 1, 1, 0, dataMask, index, 0, 0);
1866
1867         return final;
1868 }
1869
1870 DerivedMesh *mesh_create_derived_view(Scene *scene, Object *ob, CustomDataMask dataMask)
1871 {
1872         DerivedMesh *final;
1873
1874         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 0, 1, 0, dataMask, -1, 0, 0);
1875
1876         return final;
1877 }
1878
1879 DerivedMesh *mesh_create_derived_no_deform(Scene *scene, Object *ob, float (*vertCos)[3],
1880                                                                                    CustomDataMask dataMask)
1881 {
1882         DerivedMesh *final;
1883         
1884         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, 0, 0, dataMask, -1, 0, 0);
1885
1886         return final;
1887 }
1888
1889 DerivedMesh *mesh_create_derived_no_virtual(Scene *scene, Object *ob, float (*vertCos)[3],
1890                                                                                         CustomDataMask dataMask)
1891 {
1892         DerivedMesh *final;
1893         
1894         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, -1, 0, dataMask, -1, 0, 0);
1895
1896         return final;
1897 }
1898
1899 DerivedMesh *mesh_create_derived_physics(Scene *scene, Object *ob, float (*vertCos)[3],
1900                                                                                         CustomDataMask dataMask)
1901 {
1902         DerivedMesh *final;
1903         
1904         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, -1, 1, dataMask, -1, 0, 0);
1905
1906         return final;
1907 }
1908
1909 DerivedMesh *mesh_create_derived_no_deform_render(Scene *scene, Object *ob,
1910                                                                                                   float (*vertCos)[3],
1911                                                                                                   CustomDataMask dataMask)
1912 {
1913         DerivedMesh *final;
1914
1915         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 1, 0, 0, dataMask, -1, 0, 0);
1916
1917         return final;
1918 }
1919
1920 /***/
1921
1922 DerivedMesh *editbmesh_get_derived_cage_and_final(Scene *scene, Object *obedit, BMEditMesh *em, DerivedMesh **final_r,
1923                                                                                                  CustomDataMask dataMask)
1924 {
1925         /* if there's no derived mesh or the last data mask used doesn't include
1926          * the data we need, rebuild the derived mesh
1927          */
1928         if(!em->derivedCage ||
1929            (em->lastDataMask & dataMask) != dataMask)
1930                 editbmesh_build_data(scene, obedit, em, dataMask);
1931
1932         *final_r = em->derivedFinal;
1933         return em->derivedCage;
1934 }
1935
1936 DerivedMesh *editbmesh_get_derived_cage(Scene *scene, Object *obedit, BMEditMesh *em, CustomDataMask dataMask)
1937 {
1938         /* if there's no derived mesh or the last data mask used doesn't include
1939          * the data we need, rebuild the derived mesh
1940          */
1941         if(!em->derivedCage ||
1942            (em->lastDataMask & dataMask) != dataMask)
1943                 editbmesh_build_data(scene, obedit, em, dataMask);
1944
1945         return em->derivedCage;
1946 }
1947
1948 DerivedMesh *editbmesh_get_derived_base(Object *obedit, BMEditMesh *em)
1949 {
1950         return getEditDerivedBMesh(em, obedit, NULL);
1951 }
1952
1953
1954 /* ********* For those who don't grasp derived stuff! (ton) :) *************** */
1955
1956 static void make_vertexcosnos__mapFunc(void *userData, int index, float *co, float *no_f, short *no_s)
1957 {
1958         float *vec = userData;
1959         
1960         vec+= 6*index;
1961
1962         /* check if we've been here before (normal should not be 0) */
1963         if(vec[3] || vec[4] || vec[5]) return;
1964
1965         copy_v3_v3(vec, co);
1966         vec+= 3;
1967         if(no_f) {
1968                 copy_v3_v3(vec, no_f);
1969         }
1970         else {
1971                 normal_short_to_float_v3(vec, no_s);
1972         }
1973 }
1974
1975 /* always returns original amount me->totvert of vertices and normals, but fully deformed and subsurfered */
1976 /* this is needed for all code using vertexgroups (no subsurf support) */
1977 /* it stores the normals as floats, but they can still be scaled as shorts (32767 = unit) */
1978 /* in use now by vertex/weight paint and particle generating */
1979
1980 float *mesh_get_mapped_verts_nors(Scene *scene, Object *ob)
1981 {
1982         Mesh *me= ob->data;
1983         DerivedMesh *dm;
1984         float *vertexcosnos;
1985         
1986         /* lets prevent crashing... */
1987         if(ob->type!=OB_MESH || me->totvert==0)
1988                 return NULL;
1989         
1990         dm= mesh_get_derived_final(scene, ob, CD_MASK_BAREMESH|CD_MASK_ORIGINDEX);
1991         vertexcosnos= MEM_callocN(6*sizeof(float)*me->totvert, "vertexcosnos map");
1992         
1993         if(dm->foreachMappedVert) {
1994                 dm->foreachMappedVert(dm, make_vertexcosnos__mapFunc, vertexcosnos);
1995         }
1996         else {
1997                 float *fp= vertexcosnos;
1998                 int a;
1999                 
2000                 for(a=0; a< me->totvert; a++, fp+=6) {
2001                         dm->getVertCo(dm, a, fp);
2002                         dm->getVertNo(dm, a, fp+3);
2003                 }
2004         }
2005         
2006         dm->release(dm);
2007         return vertexcosnos;
2008 }
2009
2010 /* ******************* GLSL ******************** */
2011
2012 typedef struct
2013 {
2014         float * precomputedFaceNormals;
2015         MTFace * mtface;        // texture coordinates
2016         MFace * mface;          // indices
2017         MVert * mvert;          // vertices & normals
2018         float (*orco)[3];
2019         float (*tangent)[4];    // destination
2020         int numTessFaces;
2021
2022 } SGLSLMeshToTangent;
2023
2024 // interface
2025 #include "mikktspace.h"
2026
2027 static int GetNumFaces(const SMikkTSpaceContext * pContext)
2028 {
2029         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2030         return pMesh->numTessFaces;
2031 }
2032
2033 static int GetNumVertsOfFace(const SMikkTSpaceContext * pContext, const int face_num)
2034 {
2035         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2036         return pMesh->mface[face_num].v4!=0 ? 4 : 3;
2037 }
2038
2039 static void GetPosition(const SMikkTSpaceContext * pContext, float fPos[], const int face_num, const int vert_index)
2040 {
2041         //assert(vert_index>=0 && vert_index<4);
2042         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2043         const float *co= pMesh->mvert[(&pMesh->mface[face_num].v1)[vert_index]].co;
2044         copy_v3_v3(fPos, co);
2045 }
2046
2047 static void GetTextureCoordinate(const SMikkTSpaceContext * pContext, float fUV[], const int face_num, const int vert_index)
2048 {
2049         //assert(vert_index>=0 && vert_index<4);
2050         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2051
2052         if(pMesh->mtface!=NULL) {
2053                 float * uv = pMesh->mtface[face_num].uv[vert_index];
2054                 fUV[0]=uv[0]; fUV[1]=uv[1];
2055         }
2056         else {
2057                 const float *orco= pMesh->orco[(&pMesh->mface[face_num].v1)[vert_index]];
2058                 map_to_sphere( &fUV[0], &fUV[1], orco[0], orco[1], orco[2]);
2059         }
2060 }
2061
2062 static void GetNormal(const SMikkTSpaceContext * pContext, float fNorm[], const int face_num, const int vert_index)
2063 {
2064         //assert(vert_index>=0 && vert_index<4);
2065         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2066
2067         const int smoothnormal = (pMesh->mface[face_num].flag & ME_SMOOTH);
2068         if(!smoothnormal) {     // flat
2069                 if(pMesh->precomputedFaceNormals) {
2070                         copy_v3_v3(fNorm, &pMesh->precomputedFaceNormals[3*face_num]);
2071                 }
2072                 else {
2073                         MFace *mf= &pMesh->mface[face_num];
2074                         float *p0= pMesh->mvert[mf->v1].co;
2075                         float *p1= pMesh->mvert[mf->v2].co;
2076                         float *p2= pMesh->mvert[mf->v3].co;
2077
2078                         if(mf->v4) {
2079                                 float *p3 = pMesh->mvert[mf->v4].co;
2080                                 normal_quad_v3(fNorm, p0, p1, p2, p3);
2081                         }
2082                         else {
2083                                 normal_tri_v3(fNorm, p0, p1, p2);
2084                         }
2085                 }
2086         }
2087         else {
2088                 const short *no= pMesh->mvert[(&pMesh->mface[face_num].v1)[vert_index]].no;
2089                 normal_short_to_float_v3(fNorm, no);
2090         }
2091 }
2092 static void SetTSpace(const SMikkTSpaceContext * pContext, const float fvTangent[], const float fSign, const int face_num, const int iVert)
2093 {
2094         //assert(vert_index>=0 && vert_index<4);
2095         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2096         float * pRes = pMesh->tangent[4*face_num+iVert];
2097         copy_v3_v3(pRes, fvTangent);
2098         pRes[3]=fSign;
2099 }
2100
2101
2102 void DM_add_tangent_layer(DerivedMesh *dm)
2103 {
2104         /* mesh vars */
2105         MTFace *mtface, *tf;
2106         MFace *mface, *mf;
2107         MVert *mvert, *v1, *v2, *v3, *v4;
2108         MemArena *arena= NULL;
2109         VertexTangent **vtangents= NULL;
2110         float (*orco)[3]= NULL, (*tangent)[4];
2111         float *uv1, *uv2, *uv3, *uv4, *vtang;
2112         float fno[3], tang[3], uv[4][2];
2113         int i, j, len, mf_vi[4], totvert, totface, iCalcNewMethod;
2114         float *nors;
2115
2116         if(CustomData_get_layer_index(&dm->faceData, CD_TANGENT) != -1)
2117                 return;
2118
2119         nors = dm->getTessFaceDataArray(dm, CD_NORMAL);
2120
2121         /* check we have all the needed layers */
2122         totvert= dm->getNumVerts(dm);
2123         totface= dm->getNumTessFaces(dm);
2124
2125         mvert= dm->getVertArray(dm);
2126         mface= dm->getTessFaceArray(dm);
2127         mtface= dm->getTessFaceDataArray(dm, CD_MTFACE);
2128
2129         if(!mtface) {
2130                 orco= dm->getVertDataArray(dm, CD_ORCO);
2131                 if(!orco)
2132                         return;
2133         }
2134         
2135         /* create tangent layer */
2136         DM_add_tessface_layer(dm, CD_TANGENT, CD_CALLOC, NULL);
2137         tangent= DM_get_tessface_data_layer(dm, CD_TANGENT);
2138         
2139         /* allocate some space */
2140         arena= BLI_memarena_new(BLI_MEMARENA_STD_BUFSIZE, "tangent layer arena");
2141         BLI_memarena_use_calloc(arena);
2142         vtangents= MEM_callocN(sizeof(VertexTangent*)*totvert, "VertexTangent");
2143
2144         // new computation method
2145         iCalcNewMethod = 1;
2146         if(iCalcNewMethod != 0) {
2147                 SGLSLMeshToTangent mesh2tangent= {0};
2148                 SMikkTSpaceContext sContext= {0};
2149                 SMikkTSpaceInterface sInterface= {0};
2150
2151                 mesh2tangent.precomputedFaceNormals = nors;
2152                 mesh2tangent.mtface = mtface;
2153                 mesh2tangent.mface = mface;
2154                 mesh2tangent.mvert = mvert;
2155                 mesh2tangent.orco = orco;
2156                 mesh2tangent.tangent = tangent;
2157                 mesh2tangent.numTessFaces = totface;
2158
2159                 sContext.m_pUserData = &mesh2tangent;
2160                 sContext.m_pInterface = &sInterface;
2161                 sInterface.m_getNumFaces = GetNumFaces;
2162                 sInterface.m_getNumVerticesOfFace = GetNumVertsOfFace;
2163                 sInterface.m_getPosition = GetPosition;
2164                 sInterface.m_getTexCoord = GetTextureCoordinate;
2165                 sInterface.m_getNormal = GetNormal;
2166                 sInterface.m_setTSpaceBasic = SetTSpace;
2167
2168                 // 0 if failed
2169                 iCalcNewMethod = genTangSpaceDefault(&sContext);
2170         }
2171
2172         if(!iCalcNewMethod) {
2173                 /* sum tangents at connected vertices */
2174                 for(i=0, tf=mtface, mf=mface; i < totface; mf++, tf++, i++) {
2175                         v1= &mvert[mf->v1];
2176                         v2= &mvert[mf->v2];
2177                         v3= &mvert[mf->v3];
2178
2179                         if (mf->v4) {
2180                                 v4= &mvert[mf->v4];
2181                                 normal_quad_v3( fno,v4->co, v3->co, v2->co, v1->co);
2182                         }
2183                         else {
2184                                 v4= NULL;
2185                                 normal_tri_v3( fno,v3->co, v2->co, v1->co);
2186                         }
2187                 
2188                         if(mtface) {
2189                                 uv1= tf->uv[0];
2190                                 uv2= tf->uv[1];
2191                                 uv3= tf->uv[2];
2192                                 uv4= tf->uv[3];
2193                         }
2194                         else {
2195                                 uv1= uv[0]; uv2= uv[1]; uv3= uv[2]; uv4= uv[3];
2196                                 map_to_sphere( &uv[0][0], &uv[0][1],orco[mf->v1][0], orco[mf->v1][1], orco[mf->v1][2]);
2197                                 map_to_sphere( &uv[1][0], &uv[1][1],orco[mf->v2][0], orco[mf->v2][1], orco[mf->v2][2]);
2198                                 map_to_sphere( &uv[2][0], &uv[2][1],orco[mf->v3][0], orco[mf->v3][1], orco[mf->v3][2]);
2199                                 if(v4)
2200                                         map_to_sphere( &uv[3][0], &uv[3][1],orco[mf->v4][0], orco[mf->v4][1], orco[mf->v4][2]);
2201                         }
2202                 
2203                         tangent_from_uv(uv1, uv2, uv3, v1->co, v2->co, v3->co, fno, tang);
2204                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v1], tang, uv1);
2205                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v2], tang, uv2);
2206                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v3], tang, uv3);
2207                 
2208                         if(mf->v4) {
2209                                 v4= &mvert[mf->v4];
2210                         
2211                                 tangent_from_uv(uv1, uv3, uv4, v1->co, v3->co, v4->co, fno, tang);
2212                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v1], tang, uv1);
2213                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v3], tang, uv3);
2214                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v4], tang, uv4);
2215                         }
2216                 }
2217         
2218                 /* write tangent to layer */
2219                 for(i=0, tf=mtface, mf=mface; i < totface; mf++, tf++, i++, tangent+=4) {
2220                         len= (mf->v4)? 4 : 3; 
2221
2222                         if(mtface == NULL) {
2223                                 map_to_sphere( &uv[0][0], &uv[0][1],orco[mf->v1][0], orco[mf->v1][1], orco[mf->v1][2]);
2224                                 map_to_sphere( &uv[1][0], &uv[1][1],orco[mf->v2][0], orco[mf->v2][1], orco[mf->v2][2]);
2225                                 map_to_sphere( &uv[2][0], &uv[2][1],orco[mf->v3][0], orco[mf->v3][1], orco[mf->v3][2]);
2226                                 if(len==4)
2227                                         map_to_sphere( &uv[3][0], &uv[3][1],orco[mf->v4][0], orco[mf->v4][1], orco[mf->v4][2]);
2228                         }
2229                 
2230                         mf_vi[0]= mf->v1;
2231                         mf_vi[1]= mf->v2;
2232                         mf_vi[2]= mf->v3;
2233                         mf_vi[3]= mf->v4;
2234                 
2235                         for(j=0; j<len; j++) {
2236                                 vtang= find_vertex_tangent(vtangents[mf_vi[j]], mtface ? tf->uv[j] : uv[j]);
2237                                 normalize_v3_v3(tangent[j], vtang);
2238                                 ((float *) tangent[j])[3]=1.0f;
2239                         }
2240                 }
2241         }
2242         
2243         BLI_memarena_free(arena);
2244         MEM_freeN(vtangents);
2245 }
2246
2247 void DM_calc_auto_bump_scale(DerivedMesh *dm)
2248 {
2249         /* int totvert= dm->getNumVerts(dm); */ /* UNUSED */
2250         int totface= dm->getNumTessFaces(dm);
2251
2252         MVert * mvert = dm->getVertArray(dm);
2253         MFace * mface = dm->getTessFaceArray(dm);
2254         MTFace * mtface = dm->getTessFaceDataArray(dm, CD_MTFACE);
2255
2256         if(mtface)
2257         {
2258                 double dsum = 0.0;
2259                 int nr_accumulated = 0;
2260                 int f;
2261
2262                 for ( f=0; f<totface; f++ )
2263                 {
2264                         {
2265                                 float * verts[4], * tex_coords[4];
2266                                 const int nr_verts = mface[f].v4!=0 ? 4 : 3;
2267                                 int i, is_degenerate;
2268
2269                                 verts[0]=mvert[mface[f].v1].co; verts[1]=mvert[mface[f].v2].co; verts[2]=mvert[mface[f].v3].co;
2270                                 tex_coords[0]=mtface[f].uv[0]; tex_coords[1]=mtface[f].uv[1]; tex_coords[2]=mtface[f].uv[2];
2271                                 if(nr_verts==4)
2272                                 {
2273                                         verts[3]=mvert[mface[f].v4].co;
2274                                         tex_coords[3]=mtface[f].uv[3];
2275                                 }
2276
2277                                 // discard degenerate faces
2278                                 is_degenerate = 0;
2279                                 if(     equals_v3v3(verts[0], verts[1]) || equals_v3v3(verts[0], verts[2]) || equals_v3v3(verts[1], verts[2]) ||
2280                                         equals_v2v2(tex_coords[0], tex_coords[1]) || equals_v2v2(tex_coords[0], tex_coords[2]) || equals_v2v2(tex_coords[1], tex_coords[2]) )
2281                                 {
2282                                         is_degenerate = 1;
2283                                 }
2284
2285                                 // verify last vertex as well if this is a quad
2286                                 if ( is_degenerate==0 && nr_verts==4 )
2287                                 {
2288                                         if(     equals_v3v3(verts[3], verts[0]) || equals_v3v3(verts[3], verts[1]) || equals_v3v3(verts[3], verts[2]) ||
2289                                                 equals_v2v2(tex_coords[3], tex_coords[0]) || equals_v2v2(tex_coords[3], tex_coords[1]) || equals_v2v2(tex_coords[3], tex_coords[2]) )
2290                                         {
2291                                                 is_degenerate = 1;
2292                                         }
2293
2294                                         // verify the winding is consistent
2295                                         if ( is_degenerate==0 )
2296                                         {
2297                                                 float prev_edge[2];
2298                                                 int is_signed = 0;
2299                                                 sub_v2_v2v2(prev_edge, tex_coords[0], tex_coords[3]);
2300
2301                                                 i = 0;
2302                                                 while ( is_degenerate==0 && i<4 )
2303                                                 {
2304                                                         float cur_edge[2], signed_area;
2305                                                         sub_v2_v2v2(cur_edge, tex_coords[(i+1)&0x3], tex_coords[i]);
2306                                                         signed_area = prev_edge[0]*cur_edge[1] - prev_edge[1]*cur_edge[0];
2307                                                         if ( i==0 ) is_signed = signed_area<0.0f ? 1 : 0;
2308                                                         else if((is_signed!=0)!=(signed_area<0.0f)) is_degenerate=1;
2309
2310                                                         if ( is_degenerate==0 )
2311                                                         {
2312                                                                 copy_v2_v2(prev_edge, cur_edge);
2313                                                                 ++i;
2314                                                         }
2315                                                 }
2316                                         }
2317                                 }
2318
2319                                 // proceed if not a degenerate face
2320                                 if ( is_degenerate==0 )
2321                                 {
2322                                         int nr_tris_to_pile=0;
2323                                         // quads split at shortest diagonal
2324                                         int offs = 0;           // initial triangulation is 0,1,2 and 0, 2, 3
2325                                         if ( nr_verts==4 )
2326                                         {
2327                                                 float pos_len_diag0, pos_len_diag1;
2328                                                 float vtmp[3];
2329                                                 sub_v3_v3v3(vtmp, verts[2], verts[0]);
2330                                                 pos_len_diag0 = dot_v3v3(vtmp, vtmp);
2331                                                 sub_v3_v3v3(vtmp, verts[3], verts[1]);
2332                                                 pos_len_diag1 = dot_v3v3(vtmp, vtmp);
2333
2334                                                 if(pos_len_diag1<pos_len_diag0)
2335                                                         offs=1;         // alter split
2336                                                 else if(pos_len_diag0==pos_len_diag1)           // do UV check instead
2337                                                 {
2338                                                         float tex_len_diag0, tex_len_diag1;
2339
2340                                                         sub_v2_v2v2(vtmp, tex_coords[2], tex_coords[0]);
2341                                                         tex_len_diag0 = dot_v2v2(vtmp, vtmp);
2342                                                         sub_v2_v2v2(vtmp, tex_coords[3], tex_coords[1]);
2343                                                         tex_len_diag1 = dot_v2v2(vtmp, vtmp);
2344
2345                                                         if(tex_len_diag1<tex_len_diag0)
2346                                                         {
2347                                                                 offs=1;         // alter split
2348                                                         }
2349                                                 }
2350                                         }
2351                                         nr_tris_to_pile = nr_verts-2 ;
2352                                         if ( nr_tris_to_pile==1 || nr_tris_to_pile==2 )
2353                                         {
2354                                                 const int indices[] = {offs+0, offs+1, offs+2, offs+0, offs+2, (offs+3)&0x3 };
2355                                                 int t;
2356                                                 for ( t=0; t<nr_tris_to_pile; t++ )
2357                                                 {
2358                                                         float f2x_area_uv;
2359                                                         float * p0 = verts[indices[t*3+0]];
2360                                                         float * p1 = verts[indices[t*3+1]];
2361                                                         float * p2 = verts[indices[t*3+2]];
2362
2363                                                         float edge_t0[2], edge_t1[2];
2364                                                         sub_v2_v2v2(edge_t0, tex_coords[indices[t*3+1]], tex_coords[indices[t*3+0]]);
2365                                                         sub_v2_v2v2(edge_t1, tex_coords[indices[t*3+2]], tex_coords[indices[t*3+0]]);
2366
2367                                                         f2x_area_uv = fabsf(edge_t0[0]*edge_t1[1] - edge_t0[1]*edge_t1[0]);
2368                                                         if ( f2x_area_uv>FLT_EPSILON )
2369                                                         {
2370                                                                 float norm[3], v0[3], v1[3], f2x_surf_area, fsurf_ratio;
2371                                                                 sub_v3_v3v3(v0, p1, p0);
2372                                                                 sub_v3_v3v3(v1, p2, p0);
2373                                                                 cross_v3_v3v3(norm, v0, v1);
2374
2375                                                                 f2x_surf_area = len_v3(norm);
2376                                                                 fsurf_ratio = f2x_surf_area/f2x_area_uv;        // tri area divided by texture area
2377
2378                                                                 ++nr_accumulated;
2379                                                                 dsum += (double)(fsurf_ratio);
2380                                                         }
2381                                                 }
2382                                         }
2383                                 }
2384                         }
2385                 }
2386
2387                 // finalize
2388                 {
2389                         const float avg_area_ratio = (nr_accumulated>0) ? ((float)(dsum / nr_accumulated)) : 1.0f;
2390                         const float use_as_render_bump_scale = sqrtf(avg_area_ratio);           // use width of average surface ratio as your bump scale
2391                         dm->auto_bump_scale = use_as_render_bump_scale;
2392                 }
2393         }
2394         else
2395         {
2396                 dm->auto_bump_scale = 1.0f;
2397         }
2398 }
2399
2400 void DM_vertex_attributes_from_gpu(DerivedMesh *dm, GPUVertexAttribs *gattribs, DMVertexAttribs *attribs)
2401 {
2402         CustomData *vdata, *fdata, *tfdata = NULL;
2403         int a, b, layer;
2404
2405         /* From the layers requested by the GLSL shader, figure out which ones are
2406          * actually available for this derivedmesh, and retrieve the pointers */
2407
2408         memset(attribs, 0, sizeof(DMVertexAttribs));
2409
2410         vdata = &dm->vertData;
2411         fdata = tfdata = dm->getTessFaceDataLayout(dm);
2412         
2413         /* calc auto bump scale if necessary */
2414         if(dm->auto_bump_scale<=0.0f)
2415                 DM_calc_auto_bump_scale(dm);
2416
2417         /* add a tangent layer if necessary */
2418         for(b = 0; b < gattribs->totlayer; b++)
2419                 if(gattribs->layer[b].type == CD_TANGENT)
2420                         if(CustomData_get_layer_index(fdata, CD_TANGENT) == -1)
2421                                 DM_add_tangent_layer(dm);
2422
2423         for(b = 0; b < gattribs->totlayer; b++) {
2424                 if(gattribs->layer[b].type == CD_MTFACE) {
2425                         /* uv coordinates */
2426                         if(gattribs->layer[b].name[0])
2427                                 layer = CustomData_get_named_layer_index(tfdata, CD_MTFACE,
2428                                         gattribs->layer[b].name);
2429                         else
2430                                 layer = CustomData_get_active_layer_index(tfdata, CD_MTFACE);
2431
2432                         if(layer != -1) {
2433                                 a = attribs->tottface++;
2434
2435                                 attribs->tface[a].array = tfdata->layers[layer].data;
2436                                 attribs->tface[a].emOffset = tfdata->layers[layer].offset;
2437                                 attribs->tface[a].glIndex = gattribs->layer[b].glindex;
2438                                 /* attribs->tface[a].glTexco = gattribs->layer[b].gltexco; */ /* BMESH_TODO, trunk has this but not bmesh, need to investigate whats going on here - campbell */
2439                         }
2440                         /* BMESH ONLY, may need to get this working?, otherwise remove */
2441                         /* else {
2442                                 int player;
2443                                 CustomData *pdata = dm->getPolyDataLayout(dm);
2444                                 
2445                                 if(gattribs->layer[b].name[0])
2446                                         player = CustomData_get_named_layer_index(pdata, CD_MTEXPOLY,
2447                                                 gattribs->layer[b].name);
2448                                 else
2449                                         player = CustomData_get_active_layer_index(pdata, CD_MTEXPOLY);
2450                                 
2451                                 if (player != -1) {
2452                                         a = attribs->tottface++;
2453         
2454                                         attribs->tface[a].array = NULL;
2455                                         attribs->tface[a].emOffset = pdata->layers[layer].offset;
2456                                         attribs->tface[a].glIndex = gattribs->layer[b].glindex;
2457                                         attribs->tface[a].glTexco = gattribs->layer[b].gltexco;
2458                                         
2459                                 }
2460                         }
2461                         */
2462                 }
2463                 else if(gattribs->layer[b].type == CD_MCOL) {
2464                         /* vertex colors */
2465                         if(gattribs->layer[b].name[0])
2466                                 layer = CustomData_get_named_layer_index(tfdata, CD_MCOL,
2467                                         gattribs->layer[b].name);
2468                         else
2469                                 layer = CustomData_get_active_layer_index(tfdata, CD_MCOL);
2470
2471                         if(layer != -1) {
2472                                 a = attribs->totmcol++;
2473
2474                                 attribs->mcol[a].array = tfdata->layers[layer].data;
2475                                 attribs->mcol[a].emOffset = tfdata->layers[layer].offset;
2476                                 attribs->mcol[a].glIndex = gattribs->layer[b].glindex;
2477                         }
2478                 }
2479                 else if(gattribs->layer[b].type == CD_TANGENT) {
2480                         /* tangents */
2481                         layer = CustomData_get_layer_index(fdata, CD_TANGENT);
2482
2483                         if(layer != -1) {
2484                                 attribs->tottang = 1;
2485
2486                                 attribs->tang.array = fdata->layers[layer].data;
2487                                 attribs->tang.emOffset = fdata->layers[layer].offset;
2488                                 attribs->tang.glIndex = gattribs->layer[b].glindex;
2489                         }
2490                 }
2491                 else if(gattribs->layer[b].type == CD_ORCO) {
2492                         /* original coordinates */
2493                         layer = CustomData_get_layer_index(vdata, CD_ORCO);
2494
2495                         if(layer != -1) {
2496                                 attribs->totorco = 1;
2497
2498                                 attribs->orco.array = vdata->layers[layer].data;
2499                                 attribs->orco.emOffset = vdata->layers[layer].offset;
2500                                 attribs->orco.glIndex = gattribs->layer[b].glindex;
2501                                 attribs->orco.glTexco = gattribs->layer[b].gltexco;
2502                         }
2503                 }
2504         }
2505 }
2506
2507 /* Set object's bounding box based on DerivedMesh min/max data */
2508 void DM_set_object_boundbox(Object *ob, DerivedMesh *dm)
2509 {
2510         float min[3], max[3];
2511
2512         INIT_MINMAX(min, max);
2513
2514         dm->getMinMax(dm, min, max);
2515
2516         if(!ob->bb)
2517                 ob->bb= MEM_callocN(sizeof(BoundBox), "DM-BoundBox");
2518
2519         boundbox_set_from_min_max(ob->bb, min, max);
2520 }
2521
2522 /* --- NAVMESH (begin) --- */
2523 #ifdef WITH_GAMEENGINE
2524
2525 BM_INLINE int navmesh_bit(int a, int b)
2526 {
2527         return (a & (1 << b)) >> b;
2528 }
2529
2530 BM_INLINE void navmesh_intToCol(int i, float col[3])
2531 {
2532         int     r = navmesh_bit(i, 0) + navmesh_bit(i, 3) * 2 + 1;
2533         int     g = navmesh_bit(i, 1) + navmesh_bit(i, 4) * 2 + 1;
2534         int     b = navmesh_bit(i, 2) + navmesh_bit(i, 5) * 2 + 1;
2535         col[0] = 1 - r*63.0f/255.0f;
2536         col[1] = 1 - g*63.0f/255.0f;
2537         col[2] = 1 - b*63.0f/255.0f;
2538 }
2539
2540 static void navmesh_drawColored(DerivedMesh *dm)
2541 {
2542         int a, glmode;
2543         MVert *mvert = (MVert *)CustomData_get_layer(&dm->vertData, CD_MVERT);
2544         MFace *mface = (MFace *)CustomData_get_layer(&dm->faceData, CD_MFACE);
2545         int *polygonIdx = (int *)CustomData_get_layer(&dm->faceData, CD_RECAST);
2546         float col[3];
2547
2548         if (!polygonIdx)
2549                 return;
2550
2551         /*
2552         //UI_ThemeColor(TH_WIRE);
2553         glDisable(GL_LIGHTING);
2554         glLineWidth(2.0);
2555         dm->drawEdges(dm, 0, 1);
2556         glLineWidth(1.0);
2557         glEnable(GL_LIGHTING);*/
2558
2559         glDisable(GL_LIGHTING);
2560         /*  if(GPU_buffer_legacy(dm) ) */ { /* TODO - VBO draw code, not high priority - campbell */
2561                 DEBUG_VBO( "Using legacy code. drawNavMeshColored\n" );
2562                 //glShadeModel(GL_SMOOTH);
2563                 glBegin(glmode = GL_QUADS);
2564                 for(a = 0; a < dm->numTessFaceData; a++, mface++) {
2565                         int new_glmode = mface->v4?GL_QUADS:GL_TRIANGLES;
2566                         int pi = polygonIdx[a];
2567                         if (pi <= 0) {
2568                                 zero_v3(col);
2569                         }
2570                         else {
2571                                 navmesh_intToCol(pi, col);
2572                         }
2573
2574                         if(new_glmode != glmode) {
2575                                 glEnd();
2576                                 glBegin(glmode = new_glmode);
2577                         }
2578                         glColor3fv(col);
2579                         glVertex3fv(mvert[mface->v1].co);
2580                         glVertex3fv(mvert[mface->v2].co);
2581                         glVertex3fv(mvert[mface->v3].co);
2582                         if(mface->v4) {
2583                                 glVertex3fv(mvert[mface->v4].co);
2584                         }
2585                 }
2586                 glEnd();
2587         }
2588         glEnable(GL_LIGHTING);
2589 }
2590
2591 static void navmesh_DM_drawFacesTex(DerivedMesh *dm,
2592                         int (*setDrawOptions)(MTFace *tface, int has_mcol, int matnr),
2593                         int (*compareDrawOptions)(void *userData, int cur_index, int next_index),
2594                         void *userData)
2595 {
2596         (void) setDrawOptions;
2597         (void) compareDrawOptions;
2598         (void) userData;
2599
2600         navmesh_drawColored(dm);
2601 }
2602
2603 static void navmesh_DM_drawFacesSolid(DerivedMesh *dm,
2604                                       float (*partial_redraw_planes)[4],
2605                                       int UNUSED(fast), int (*setMaterial)(int, void *attribs))
2606 {
2607         (void) partial_redraw_planes;
2608         (void) setMaterial;
2609
2610         //drawFacesSolid_original(dm, partial_redraw_planes, fast, setMaterial);
2611         navmesh_drawColored(dm);
2612 }
2613
2614 static DerivedMesh *navmesh_dm_createNavMeshForVisualization(DerivedMesh *dm)
2615 {
2616         DerivedMesh *result;
2617         int maxFaces = dm->getNumPolys(dm);
2618         int *recastData;
2619         int vertsPerPoly=0, nverts=0, ndtris=0, npolys=0;
2620         float* verts=NULL;
2621         unsigned short *dtris=NULL, *dmeshes=NULL, *polys=NULL;
2622         int *dtrisToPolysMap=NULL, *dtrisToTrisMap=NULL, *trisToFacesMap=NULL;
2623         int res;
2624
2625         result = CDDM_copy(dm, 0);
2626         if (!CustomData_has_layer(&result->faceData, CD_RECAST)) {
2627                 int *sourceRecastData = (int*)CustomData_get_layer(&dm->faceData, CD_RECAST);
2628                 if (sourceRecastData) {
2629                         CustomData_add_layer_named(&result->faceData, CD_RECAST, CD_DUPLICATE,
2630                                                    sourceRecastData, maxFaces, "recastData");
2631                 }
2632         }
2633         recastData = (int*)CustomData_get_layer(&result->faceData, CD_RECAST);
2634
2635         /* note: This is not good design! - really should not be doing this */
2636         result->drawFacesTex =  navmesh_DM_drawFacesTex;
2637         result->drawFacesSolid = navmesh_DM_drawFacesSolid;
2638
2639
2640         /* process mesh */
2641         res  = buildNavMeshDataByDerivedMesh(dm, &vertsPerPoly, &nverts, &verts, &ndtris, &dtris,
2642                                              &npolys, &dmeshes, &polys, &dtrisToPolysMap, &dtrisToTrisMap,
2643                                              &trisToFacesMap);
2644         if (res) {
2645                 size_t polyIdx;
2646
2647                 /* invalidate concave polygon */
2648                 for (polyIdx=0; polyIdx<(size_t)npolys; polyIdx++) {
2649                         unsigned short* poly = &polys[polyIdx*2*vertsPerPoly];
2650                         if (!polyIsConvex(poly, vertsPerPoly, verts)) {
2651                                 /* set negative polygon idx to all faces */
2652                                 unsigned short *dmesh = &dmeshes[4*polyIdx];
2653                                 unsigned short tbase = dmesh[2];
2654                                 unsigned short tnum = dmesh[3];
2655                                 unsigned short ti;
2656
2657                                 for (ti=0; ti<tnum; ti++) {
2658                                         unsigned short triidx = dtrisToTrisMap[tbase+ti];
2659                                         unsigned short faceidx = trisToFacesMap[triidx];
2660                                         if (recastData[faceidx] > 0) {
2661                                                 recastData[faceidx] = -recastData[faceidx];
2662                                         }
2663                                 }
2664                         }
2665                 }
2666         }
2667         else {
2668                 printf("Error during creation polygon infos\n");
2669         }
2670
2671         /* clean up */
2672         if (verts!=NULL)
2673                 MEM_freeN(verts);
2674         if (dtris!=NULL)
2675                 MEM_freeN(dtris);
2676         if (dmeshes!=NULL)
2677                 MEM_freeN(dmeshes);
2678         if (polys!=NULL)
2679                 MEM_freeN(polys);
2680         if (dtrisToPolysMap!=NULL)
2681                 MEM_freeN(dtrisToPolysMap);
2682         if (dtrisToTrisMap!=NULL)
2683                 MEM_freeN(dtrisToTrisMap);
2684         if (trisToFacesMap!=NULL)
2685                 MEM_freeN(trisToFacesMap);
2686
2687         return result;
2688 }
2689
2690 #endif /* WITH_GAMEENGINE */
2691
2692 /* --- NAVMESH (end) --- */