svn merge ^/trunk/blender -r42761:42776
[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 static 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                 unsigned 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 /* return an array of vertex weight colors, caller must free.
962  *
963  * note that we could save some memory and allocate RGB only but then we'd need to
964  * re-arrange the colors when copying to the face since MCol has odd ordering,
965  * so leave this as is - campbell */
966 static unsigned char *calc_weightpaint_vert_array(Object *ob, int const draw_flag, ColorBand *coba)
967 {
968         Mesh *me = ob->data;
969         unsigned char *wtcol_v = MEM_mallocN (sizeof(unsigned char) * me->totvert * 4, "weightmap_v");
970
971         if (me->dvert) {
972                 unsigned char *wc = wtcol_v;
973                 MDeformVert *dv= me->dvert;
974                 unsigned int i;
975
976                 /* varisbles for multipaint */
977                 const int defbase_tot = BLI_countlist(&ob->defbase);
978                 const int defbase_act = ob->actdef-1;
979                 char *dg_flags = MEM_mallocN(defbase_tot * sizeof(char), __func__);
980                 const int selected = get_selected_defgroups(ob, dg_flags, defbase_tot);
981                 /* const int unselected = defbase_tot - selected; */ /* UNUSED */
982
983                 for (i = me->totvert; i != 0; i--, wc += 4, dv++) {
984                         calc_weightpaint_vert_color(wc, dv, coba, defbase_tot, defbase_act, dg_flags, selected, draw_flag);
985                 }
986
987                 MEM_freeN(dg_flags);
988         }
989         else {
990                 int col_i;
991                 weightpaint_color((unsigned char *)&col_i, coba, 0.0f);
992                 fill_vn_i((int *)wtcol_v, me->totvert, col_i);
993         }
994
995         return wtcol_v;
996 }
997
998 static void add_weight_mcol_dm(Object *ob, DerivedMesh *dm, int const draw_flag)
999 {
1000         ColorBand *coba= stored_cb;     /* warning, not a local var */
1001         unsigned char *wtcol_v = calc_weightpaint_vert_array(ob, draw_flag, coba);
1002         unsigned char *wtcol_f;
1003         unsigned char(*wtcol_l)[4] = NULL;
1004         BLI_array_declare(wtcol_l);
1005         MFace *mf = dm->getTessFaceArray(dm);
1006         MLoop *mloop = dm->getLoopArray(dm), *ml;
1007         MPoly *mp = dm->getPolyArray(dm);
1008         int i, j, totface=dm->getNumTessFaces(dm), totloop;
1009         int *origIndex = dm->getVertDataArray(dm, CD_ORIGINDEX);
1010
1011         wtcol_f = MEM_mallocN(sizeof (unsigned char) * totface*4*4, "weightmap_f");
1012
1013         /*first add colors to the tesselation faces*/
1014         for (i=0; i<totface; i++, mf++) {
1015                 /*origindex being NULL means we're operating on original mesh data*/
1016                 unsigned int fidx= mf->v4 ? 3:2;
1017                 do {
1018                         copy_v4_v4_char((char *)&wtcol_f[(4 * i + fidx) * 4],
1019                                         (char *)&wtcol_v[4 * (*(&mf->v1 + fidx))]);
1020                 } while (fidx--);
1021         }
1022
1023         CustomData_add_layer(&dm->faceData, CD_WEIGHT_MCOL, CD_ASSIGN, wtcol_f, totface);
1024
1025         /*now add to loops, so the data can be passed through the modifier stack*/
1026         totloop = 0;
1027         for (i=0; i<dm->numPolyData; i++, mp++) {
1028                 ml = mloop + mp->loopstart;
1029
1030                 for (j=0; j<mp->totloop; j++, ml++, totloop++) {
1031                         BLI_array_growone(wtcol_l);
1032                         copy_v4_v4_char((char *)&wtcol_l[totloop],
1033                                         (char *)&wtcol_v[4 * (origIndex ? origIndex[ml->v] : ml->v)]);
1034                 }
1035         }
1036
1037         MEM_freeN(wtcol_v);
1038
1039         CustomData_add_layer(&dm->loopData, CD_WEIGHT_MLOOPCOL, CD_ASSIGN, wtcol_l, totloop);
1040 }
1041
1042
1043 static void shapekey_layers_to_keyblocks(DerivedMesh *dm, Mesh *me, int actshape_uid)
1044 {
1045         KeyBlock *kb;
1046         int i, j, tot;
1047         
1048         if (!me->key)
1049                 return; 
1050         
1051         tot = CustomData_number_of_layers(&dm->vertData, CD_SHAPEKEY);
1052         for (i=0; i<tot; i++) {
1053                 CustomDataLayer *layer = &dm->vertData.layers[CustomData_get_layer_index_n(&dm->vertData, CD_SHAPEKEY, i)];
1054                 float (*cos)[3], (*kbcos)[3];
1055                 
1056                 for (kb=me->key->block.first; kb; kb=kb->next) {
1057                         if (kb->uid == layer->uid)
1058                                 break;
1059                 }
1060                 
1061                 if (!kb) {
1062                         kb = add_keyblock(me->key, layer->name);
1063                         kb->uid = layer->uid;
1064                 }
1065                 
1066                 if (kb->data)
1067                         MEM_freeN(kb->data);
1068                 
1069                 cos = CustomData_get_layer_n(&dm->vertData, CD_SHAPEKEY, i);
1070                 kb->totelem = dm->numVertData;
1071
1072                 kb->data = kbcos = MEM_mallocN(sizeof(float)*3*kb->totelem, "kbcos DerivedMesh.c");
1073                 if (kb->uid == actshape_uid) {
1074                         MVert *mvert = dm->getVertArray(dm);
1075                         
1076                         for (j=0; j<dm->numVertData; j++, kbcos++, mvert++) {
1077                                 copy_v3_v3(*kbcos, mvert->co);
1078                         }
1079                 } else {
1080                         for (j=0; j<kb->totelem; j++, cos++, kbcos++) {
1081                                 copy_v3_v3(*kbcos, *cos);
1082                         }
1083                 }
1084         }
1085         
1086         for (kb=me->key->block.first; kb; kb=kb->next) {
1087                 if (kb->totelem != dm->numVertData) {
1088                         if (kb->data)
1089                                 MEM_freeN(kb->data);
1090                         
1091                         kb->totelem = dm->numVertData;
1092                         kb->data = MEM_callocN(sizeof(float)*3*kb->totelem, "kb->data derivedmesh.c");
1093                         fprintf(stderr, "%s: lost a shapekey layer! (bmesh internal error)\n", __func__);
1094                 }
1095         }
1096 }
1097
1098 static void add_shapekey_layers(DerivedMesh *dm, Mesh *me, Object *UNUSED(ob))
1099 {
1100         KeyBlock *kb;
1101         Key *key = me->key;
1102         int a, b;
1103         
1104         if (!me->key)
1105                 return;
1106         
1107         if (dm->numVertData != me->totvert) {
1108                 printf("error in add_shapekey_layers: dm isn't the same size as me\n");
1109                 return;
1110         }
1111                 
1112         for (a=0, kb=key->block.first; kb; kb=kb->next, a++) {
1113                 float (*cos)[3] = CustomData_add_layer_named(&dm->vertData, CD_SHAPEKEY, CD_CALLOC, NULL, dm->numVertData, kb->name);
1114                 int ci = CustomData_get_layer_index_n(&dm->vertData, CD_SHAPEKEY, a);
1115                 
1116                 dm->vertData.layers[ci].uid = kb->uid;
1117                 if (kb->totelem != dm->numVertData) {
1118                         printf("error in add_shapekey_layers: totelem and totvert don't match");
1119                         continue;
1120                 }
1121                 
1122                 for (b=0; b<kb->totelem; b++, cos++) {
1123                         copy_v3_v3((float *)cos, ((float*)kb->data)+b*3);
1124                 }
1125         }
1126 }
1127
1128 /* new value for useDeform -1  (hack for the gameengine):
1129  * - apply only the modifier stack of the object, skipping the virtual modifiers,
1130  * - don't apply the key
1131  * - apply deform modifiers and input vertexco
1132  */
1133 static void mesh_calc_modifiers(Scene *scene, Object *ob, float (*inputVertexCos)[3],
1134                                                                 DerivedMesh **deform_r, DerivedMesh **final_r,
1135                                                                 int useRenderParams, int useDeform,
1136                                                                 int needMapping, CustomDataMask dataMask, 
1137                                                                 int index, int useCache, int build_shapekey_layers)
1138 {
1139         Mesh *me = ob->data;
1140         ModifierData *firstmd, *md;
1141         LinkNode *datamasks, *curr;
1142         CustomDataMask mask, nextmask, append_mask = 0;
1143         float (*deformedVerts)[3] = NULL;
1144         DerivedMesh *dm=NULL, *orcodm, *clothorcodm, *finaldm;
1145         int numVerts = me->totvert;
1146         int required_mode;
1147         int isPrevDeform= FALSE;
1148         int skipVirtualArmature = (useDeform < 0);
1149         MultiresModifierData *mmd= get_multires_modifier(scene, ob, 0);
1150         int has_multires = mmd != NULL, multires_applied = 0;
1151         int sculpt_mode = ob->mode & OB_MODE_SCULPT && ob->sculpt;
1152
1153         int draw_flag= ((scene->toolsettings->multipaint ? CALC_WP_MULTIPAINT : 0) |
1154                         (scene->toolsettings->auto_normalize ? CALC_WP_AUTO_NORMALIZE : 0));
1155
1156         if(mmd && !mmd->sculptlvl)
1157                 has_multires = 0;
1158
1159         if(!skipVirtualArmature) {
1160                 firstmd = modifiers_getVirtualModifierList(ob);
1161         }
1162         else {
1163                 /* game engine exception */
1164                 firstmd = ob->modifiers.first;
1165                 if(firstmd && firstmd->type == eModifierType_Armature)
1166                         firstmd = firstmd->next;
1167         }
1168
1169         md = firstmd;
1170
1171         modifiers_clearErrors(ob);
1172
1173         if(useRenderParams) required_mode = eModifierMode_Render;
1174         else required_mode = eModifierMode_Realtime;
1175
1176         datamasks = modifiers_calcDataMasks(scene, ob, md, dataMask, required_mode);
1177         curr = datamasks;
1178
1179         if(deform_r) *deform_r = NULL;
1180         *final_r = NULL;
1181
1182         if(useDeform) {
1183                 if(inputVertexCos)
1184                         deformedVerts = inputVertexCos;
1185                 
1186                 /* Apply all leading deforming modifiers */
1187                 for(;md; md = md->next, curr = curr->next) {
1188                         ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1189
1190                         md->scene= scene;
1191                         
1192                         if(!modifier_isEnabled(scene, md, required_mode)) continue;
1193                         if(useDeform < 0 && mti->dependsOnTime && mti->dependsOnTime(md)) continue;
1194
1195                         if(mti->type == eModifierTypeType_OnlyDeform) {
1196                                 if(!deformedVerts)
1197                                         deformedVerts = mesh_getVertexCos(me, &numVerts);
1198
1199                                 mti->deformVerts(md, ob, NULL, deformedVerts, numVerts, useRenderParams, useDeform);
1200                         } else {
1201                                 break;
1202                         }
1203                         
1204                         /* grab modifiers until index i */
1205                         if((index >= 0) && (modifiers_indexInObject(ob, md) >= index))
1206                                 break;
1207                 }
1208
1209                 /* Result of all leading deforming modifiers is cached for
1210                  * places that wish to use the original mesh but with deformed
1211                  * coordinates (vpaint, etc.)
1212                  */
1213                 if (deform_r) {
1214                         *deform_r = CDDM_from_mesh(me, ob);
1215                          
1216                         if (build_shapekey_layers)
1217                                 add_shapekey_layers(dm, me, ob);
1218                         
1219                         if(deformedVerts) {
1220                                 CDDM_apply_vert_coords(*deform_r, deformedVerts);
1221                                 CDDM_calc_normals(*deform_r);
1222                         }
1223                 }
1224         } else {
1225                 /* default behaviour for meshes */
1226                 if(inputVertexCos)
1227                         deformedVerts = inputVertexCos;
1228                 else
1229                         deformedVerts = mesh_getVertexCos(me, &numVerts);
1230         }
1231
1232
1233         /* Now apply all remaining modifiers. If useDeform is off then skip
1234          * OnlyDeform ones. 
1235          */
1236         dm = NULL;
1237         orcodm = NULL;
1238         clothorcodm = NULL;
1239
1240         for(;md; md = md->next, curr = curr->next) {
1241                 ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1242
1243                 md->scene= scene;
1244
1245                 if(!modifier_isEnabled(scene, md, required_mode)) continue;
1246                 if(mti->type == eModifierTypeType_OnlyDeform && !useDeform) continue;
1247                 if((mti->flags & eModifierTypeFlag_RequiresOriginalData) && dm) {
1248                         modifier_setError(md, "Modifier requires original data, bad stack position.");
1249                         continue;
1250                 }
1251                 if(sculpt_mode && (!has_multires || multires_applied)) {
1252                         int unsupported= 0;
1253
1254                         if(scene->toolsettings->sculpt->flags & SCULPT_ONLY_DEFORM)
1255                                 unsupported|= mti->type != eModifierTypeType_OnlyDeform;
1256
1257                         unsupported|= md->type == eModifierType_Multires && ((MultiresModifierData*)md)->sculptlvl==0;
1258                         unsupported|= multires_applied;
1259
1260                         if(unsupported) {
1261                                 modifier_setError(md, "Not supported in sculpt mode.");
1262                                 continue;
1263                         }
1264                 }
1265                 if(needMapping && !modifier_supportsMapping(md)) continue;
1266                 if(useDeform < 0 && mti->dependsOnTime && mti->dependsOnTime(md)) continue;
1267
1268                 /* add an orco layer if needed by this modifier */
1269                 if(mti->requiredDataMask)
1270                         mask = mti->requiredDataMask(ob, md);
1271                 else
1272                         mask = 0;
1273
1274                 if(dm && (mask & CD_MASK_ORCO))
1275                         add_orco_dm(ob, NULL, dm, orcodm, CD_ORCO);
1276
1277                 /* How to apply modifier depends on (a) what we already have as
1278                  * a result of previous modifiers (could be a DerivedMesh or just
1279                  * deformed vertices) and (b) what type the modifier is.
1280                  */
1281
1282                 if(mti->type == eModifierTypeType_OnlyDeform) {
1283                         /* No existing verts to deform, need to build them. */
1284                         if(!deformedVerts) {
1285                                 if(dm) {
1286                                         /* Deforming a derived mesh, read the vertex locations
1287                                          * out of the mesh and deform them. Once done with this
1288                                          * run of deformers verts will be written back.
1289                                          */
1290                                         numVerts = dm->getNumVerts(dm);
1291                                         deformedVerts =
1292                                                 MEM_mallocN(sizeof(*deformedVerts) * numVerts, "dfmv");
1293                                         dm->getVertCos(dm, deformedVerts);
1294                                 } else {
1295                                         deformedVerts = mesh_getVertexCos(me, &numVerts);
1296                                 }
1297                         }
1298
1299                         /* if this is not the last modifier in the stack then recalculate the normals
1300                          * to avoid giving bogus normals to the next modifier see: [#23673] */
1301                         if(dm && isPrevDeform &&  mti->dependsOnNormals && mti->dependsOnNormals(md)) {
1302                                 /* XXX, this covers bug #23673, but we may need normal calc for other types */
1303                                 if(dm && dm->type == DM_TYPE_CDDM) {
1304                                         CDDM_apply_vert_coords(dm, deformedVerts);
1305                                         CDDM_calc_normals(dm);
1306                                 }
1307                         }
1308
1309                         mti->deformVerts(md, ob, dm, deformedVerts, numVerts, useRenderParams, useDeform);
1310                 } else {
1311                         DerivedMesh *ndm;
1312
1313                         /* determine which data layers are needed by following modifiers */
1314                         if(curr->next)
1315                                 nextmask= (CustomDataMask)GET_INT_FROM_POINTER(curr->next->link);
1316                         else
1317                                 nextmask= dataMask;
1318
1319                         /* apply vertex coordinates or build a DerivedMesh as necessary */
1320                         if(dm) {
1321                                 if(deformedVerts) {
1322                                         DerivedMesh *tdm = CDDM_copy(dm, 0);
1323                                         dm->release(dm);
1324                                         dm = tdm;
1325
1326                                         CDDM_apply_vert_coords(dm, deformedVerts);
1327                                         CDDM_calc_normals(dm);
1328                                 }
1329                         } else {
1330                                 dm = CDDM_from_mesh(me, ob);
1331
1332                                 if (build_shapekey_layers)
1333                                         add_shapekey_layers(dm, me, ob);
1334
1335                                 if(deformedVerts) {
1336                                         CDDM_apply_vert_coords(dm, deformedVerts);
1337                                         CDDM_calc_normals(dm);
1338                                 }
1339
1340                                 /* Constructive modifiers need to have an origindex
1341                                  * otherwise they wont have anywhere to copy the data from.
1342                                  *
1343                                  * Also create ORIGINDEX data if any of the following modifiers
1344                                  * requests it, this way Mirror, Solidify etc will keep ORIGINDEX
1345                                  * data by using generic DM_copy_vert_data() functions.
1346                                  */
1347                                 if(needMapping || (nextmask & CD_MASK_ORIGINDEX)) {
1348                                         /* calc */
1349                                         DM_add_vert_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
1350                                         DM_add_edge_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
1351                                         DM_add_poly_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
1352
1353                                         range_vn_i(DM_get_vert_data_layer(dm, CD_ORIGINDEX), dm->numVertData, 0);
1354                                         range_vn_i(DM_get_edge_data_layer(dm, CD_ORIGINDEX), dm->numEdgeData, 0);
1355                                         range_vn_i(DM_get_poly_data_layer(dm, CD_ORIGINDEX), dm->numPolyData, 0);
1356                                 }
1357
1358                                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
1359                                         add_weight_mcol_dm(ob, dm, draw_flag);
1360
1361                         }
1362
1363                         
1364                         /* set the DerivedMesh to only copy needed data */
1365                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link);
1366                         /* needMapping check here fixes bug [#28112], otherwise its
1367                          * possible that it wont be copied */
1368                         mask |= append_mask;
1369                         DM_set_only_copy(dm, mask | (needMapping ? CD_MASK_ORIGINDEX : 0));
1370                         
1371                         /* add cloth rest shape key if need */
1372                         if(mask & CD_MASK_CLOTH_ORCO)
1373                                 add_orco_dm(ob, NULL, dm, clothorcodm, CD_CLOTH_ORCO);
1374
1375                         /* add an origspace layer if needed */
1376                         if(((CustomDataMask)GET_INT_FROM_POINTER(curr->link)) & CD_MASK_ORIGSPACE)
1377                                 if(!CustomData_has_layer(&dm->faceData, CD_ORIGSPACE))
1378                                         DM_add_tessface_layer(dm, CD_ORIGSPACE, CD_DEFAULT, NULL);
1379
1380                         ndm = mti->applyModifier(md, ob, dm, useRenderParams, useCache);
1381
1382                         if(ndm) {
1383                                 /* if the modifier returned a new dm, release the old one */
1384                                 if(dm && dm != ndm) dm->release(dm);
1385
1386                                 dm = ndm;
1387
1388                                 if(deformedVerts) {
1389                                         if(deformedVerts != inputVertexCos)
1390                                                 MEM_freeN(deformedVerts);
1391
1392                                         deformedVerts = NULL;
1393                                 }
1394                         } 
1395
1396                         /* create an orco derivedmesh in parallel */
1397                         if(nextmask & CD_MASK_ORCO) {
1398                                 if(!orcodm)
1399                                         orcodm= create_orco_dm(ob, me, NULL, CD_ORCO);
1400
1401                                 nextmask &= ~CD_MASK_ORCO;
1402                                 DM_set_only_copy(orcodm, nextmask | CD_MASK_ORIGINDEX);
1403                                 ndm = mti->applyModifier(md, ob, orcodm, useRenderParams, 0);
1404
1405                                 if(ndm) {
1406                                         /* if the modifier returned a new dm, release the old one */
1407                                         if(orcodm && orcodm != ndm) orcodm->release(orcodm);
1408                                         orcodm = ndm;
1409                                 }
1410                         }
1411
1412                         /* create cloth orco derivedmesh in parallel */
1413                         if(nextmask & CD_MASK_CLOTH_ORCO) {
1414                                 if(!clothorcodm)
1415                                         clothorcodm= create_orco_dm(ob, me, NULL, CD_CLOTH_ORCO);
1416
1417                                 nextmask &= ~CD_MASK_CLOTH_ORCO;
1418                                 DM_set_only_copy(clothorcodm, nextmask | CD_MASK_ORIGINDEX);
1419                                 ndm = mti->applyModifier(md, ob, clothorcodm, useRenderParams, 0);
1420
1421                                 if(ndm) {
1422                                         /* if the modifier returned a new dm, release the old one */
1423                                         if(clothorcodm && clothorcodm != ndm) clothorcodm->release(clothorcodm);
1424                                         clothorcodm = ndm;
1425                                 }
1426                         }
1427
1428                         /* in case of dynamic paint, make sure preview mask remains for following modifiers */
1429                         if (md->type == eModifierType_DynamicPaint)
1430                                 append_mask |= CD_MASK_WEIGHT_MCOL;
1431                 }
1432
1433                 isPrevDeform= (mti->type == eModifierTypeType_OnlyDeform);
1434
1435                 /* grab modifiers until index i */
1436                 if((index >= 0) && (modifiers_indexInObject(ob, md) >= index))
1437                         break;
1438
1439                 if(sculpt_mode && md->type == eModifierType_Multires)
1440                         multires_applied = 1;
1441         }
1442
1443         for(md=firstmd; md; md=md->next)
1444                 modifier_freeTemporaryData(md);
1445
1446         /* Yay, we are done. If we have a DerivedMesh and deformed vertices
1447          * need to apply these back onto the DerivedMesh. If we have no
1448          * DerivedMesh then we need to build one.
1449          */
1450         if(dm && deformedVerts) {
1451                 finaldm = CDDM_copy(dm, 0);
1452
1453                 dm->release(dm);
1454
1455                 CDDM_apply_vert_coords(finaldm, deformedVerts);
1456
1457                 CDDM_calc_normals(finaldm);
1458
1459                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
1460                         add_weight_mcol_dm(ob, finaldm, draw_flag);
1461
1462         } else if(dm) {
1463                 finaldm = dm;
1464         } else {
1465                 int recalc_normals= 0;
1466
1467                 finaldm = CDDM_from_mesh(me, ob);
1468                 
1469                 if(build_shapekey_layers) {
1470                         add_shapekey_layers(finaldm, me, ob);
1471                         recalc_normals= 1;
1472                 }
1473                 
1474                 if(deformedVerts) {
1475                         CDDM_apply_vert_coords(finaldm, deformedVerts);
1476                         recalc_normals= 1;
1477                 }
1478
1479                 if(recalc_normals)
1480                         CDDM_calc_normals(finaldm);
1481                 
1482                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
1483                         add_weight_mcol_dm(ob, finaldm, draw_flag);
1484         }
1485
1486         /* add an orco layer if needed */
1487         if(dataMask & CD_MASK_ORCO) {
1488                 add_orco_dm(ob, NULL, finaldm, orcodm, CD_ORCO);
1489
1490                 if(deform_r && *deform_r)
1491                         add_orco_dm(ob, NULL, *deform_r, NULL, CD_ORCO);
1492         }
1493
1494 #ifdef WITH_GAMEENGINE
1495         /* NavMesh - this is a hack but saves having a NavMesh modifier */
1496         if ((ob->gameflag & OB_NAVMESH) && (finaldm->type == DM_TYPE_CDDM)) {
1497                 DerivedMesh *tdm;
1498                 tdm= navmesh_dm_createNavMeshForVisualization(finaldm);
1499                 if (finaldm != tdm) {
1500                         finaldm->release(finaldm);
1501                         finaldm= tdm;
1502                 }
1503         }
1504 #endif /* WITH_GAMEENGINE */
1505
1506
1507         /* --------------------------------------------------------------------- */
1508         /* Re-tesselation is necessary to push render data (uvs, textures, colors)
1509          * from loops and polys onto the tessfaces. This may be currently be
1510          * redundantin cases where the render mode doesn't use these inputs, but
1511          * ideally eventually tesselation would happen on-demand, and this is one
1512          * of the primary places it would be needed. */
1513         finaldm->recalcTesselation(finaldm);
1514         /* if we have no modifiers applied we'lll still want the tessface normals
1515          * to be calculated from the polygon noramals,
1516          * 'CDDM_calc_normals' checks for this case - campbell */
1517         finaldm->calcNormals(finaldm);
1518         /* Need to watch this, it can cause issues, see bug [#29338]             */
1519         /* take care with this block, we really need testing frameworks          */
1520         /* --------------------------------------------------------------------- */
1521
1522
1523         *final_r = finaldm;
1524
1525         if(orcodm)
1526                 orcodm->release(orcodm);
1527         if(clothorcodm)
1528                 clothorcodm->release(clothorcodm);
1529
1530         if(deformedVerts && deformedVerts != inputVertexCos)
1531                 MEM_freeN(deformedVerts);
1532
1533         BLI_linklist_free(datamasks, NULL);
1534 }
1535
1536 float (*editbmesh_get_vertex_cos(BMEditMesh *em, int *numVerts_r))[3]
1537 {
1538         int i, numVerts = *numVerts_r = em->bm->totvert;
1539         float (*cos)[3];
1540         BMIter iter;
1541         BMVert *eve;
1542
1543         cos = MEM_mallocN(sizeof(float)*3*numVerts, "vertexcos");
1544
1545         eve = BMIter_New(&iter, em->bm, BM_VERTS_OF_MESH, NULL);
1546         for (i=0; eve; eve=BMIter_Step(&iter), i++) {
1547                 copy_v3_v3(cos[i], eve->co);
1548         }
1549
1550         return cos;
1551 }
1552
1553 int editbmesh_modifier_is_enabled(Scene *scene, ModifierData *md, DerivedMesh *dm)
1554 {
1555         ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1556         int required_mode = eModifierMode_Realtime | eModifierMode_Editmode;
1557
1558         if(!modifier_isEnabled(scene, md, required_mode)) return 0;
1559         if((mti->flags & eModifierTypeFlag_RequiresOriginalData) && dm) {
1560                 modifier_setError(md, "Modifier requires original data, bad stack position.");
1561                 return 0;
1562         }
1563         
1564         return 1;
1565 }
1566
1567 static void editbmesh_calc_modifiers(Scene *scene, Object *ob, BMEditMesh *em, DerivedMesh **cage_r,
1568                                                                         DerivedMesh **final_r,
1569                                                                         CustomDataMask dataMask)
1570 {
1571         ModifierData *md;
1572         float (*deformedVerts)[3] = NULL;
1573         CustomDataMask mask;
1574         DerivedMesh *dm = NULL, *orcodm = NULL, *finaldm = NULL;
1575         int i, numVerts = 0, cageIndex = modifiers_getCageIndex(scene, ob, NULL, 1);
1576         LinkNode *datamasks, *curr;
1577         int required_mode = eModifierMode_Realtime | eModifierMode_Editmode;
1578
1579         modifiers_clearErrors(ob);
1580
1581         if(cage_r && cageIndex == -1) {
1582                 *cage_r = getEditDerivedBMesh(em, ob, NULL);
1583         }
1584
1585         md = modifiers_getVirtualModifierList(ob);
1586
1587         datamasks = modifiers_calcDataMasks(scene, ob, md, dataMask, required_mode);
1588
1589         curr = datamasks;
1590         for(i = 0; md; i++, md = md->next, curr = curr->next) {
1591                 ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1592
1593                 md->scene= scene;
1594                 
1595                 if(!editbmesh_modifier_is_enabled(scene, md, dm))
1596                         continue;
1597
1598                 /* add an orco layer if needed by this modifier */
1599                 if(dm && mti->requiredDataMask) {
1600                         mask = mti->requiredDataMask(ob, md);
1601                         if(mask & CD_MASK_ORCO)
1602                                 add_orco_dm(ob, em, dm, orcodm, CD_ORCO);
1603                 }
1604
1605                 /* How to apply modifier depends on (a) what we already have as
1606                  * a result of previous modifiers (could be a DerivedMesh or just
1607                  * deformed vertices) and (b) what type the modifier is.
1608                  */
1609
1610                 if(mti->type == eModifierTypeType_OnlyDeform) {
1611                         /* No existing verts to deform, need to build them. */
1612                         if(!deformedVerts) {
1613                                 if(dm) {
1614                                         /* Deforming a derived mesh, read the vertex locations
1615                                          * out of the mesh and deform them. Once done with this
1616                                          * run of deformers verts will be written back.
1617                                          */
1618                                         numVerts = dm->getNumVerts(dm);
1619                                         deformedVerts =
1620                                                 MEM_mallocN(sizeof(*deformedVerts) * numVerts, "dfmv");
1621                                         dm->getVertCos(dm, deformedVerts);
1622                                 } else {
1623                                         deformedVerts = editbmesh_get_vertex_cos(em, &numVerts);
1624                                 }
1625                         }
1626
1627                         if (mti->deformVertsEM)
1628                                 mti->deformVertsEM(md, ob, em, dm, deformedVerts, numVerts);
1629                         else mti->deformVerts(md, ob, dm, deformedVerts, numVerts, 0, 0);
1630                 } else {
1631                         DerivedMesh *ndm;
1632
1633                         /* apply vertex coordinates or build a DerivedMesh as necessary */
1634                         if(dm) {
1635                                 if(deformedVerts) {
1636                                         DerivedMesh *tdm = CDDM_copy(dm, 0);
1637                                         if(!(cage_r && dm == *cage_r)) dm->release(dm);
1638                                         dm = tdm;
1639
1640                                         CDDM_apply_vert_coords(dm, deformedVerts);
1641                                         CDDM_calc_normals(dm);
1642                                 } else if(cage_r && dm == *cage_r) {
1643                                         /* dm may be changed by this modifier, so we need to copy it
1644                                          */
1645                                         dm = CDDM_copy(dm, 0);
1646                                 }
1647
1648                         } else {
1649                                 dm = CDDM_from_BMEditMesh(em, ob->data, 0);
1650
1651                                 if(deformedVerts) {
1652                                         CDDM_apply_vert_coords(dm, deformedVerts);
1653                                         CDDM_calc_normals(dm);
1654                                 }
1655                         }
1656
1657                         /* create an orco derivedmesh in parallel */
1658                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link);
1659                         if(mask & CD_MASK_ORCO) {
1660                                 if(!orcodm)
1661                                         orcodm= create_orco_dm(ob, ob->data, em, CD_ORCO);
1662
1663                                 mask &= ~CD_MASK_ORCO;
1664                                 DM_set_only_copy(orcodm, mask | CD_MASK_ORIGINDEX);
1665
1666                                 if (mti->applyModifierEM)
1667                                         ndm = mti->applyModifierEM(md, ob, em, orcodm);
1668                                 else
1669                                         ndm = mti->applyModifier(md, ob, orcodm, 0, 0);
1670
1671                                 if(ndm) {
1672                                         /* if the modifier returned a new dm, release the old one */
1673                                         if(orcodm && orcodm != ndm) orcodm->release(orcodm);
1674                                         orcodm = ndm;
1675                                 }
1676                         }
1677
1678                         /* set the DerivedMesh to only copy needed data */
1679                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link); /* CD_MASK_ORCO may have been cleared above */
1680
1681                         DM_set_only_copy(dm, mask | CD_MASK_ORIGINDEX);
1682
1683                         if(mask & CD_MASK_ORIGSPACE)
1684                                 if(!CustomData_has_layer(&dm->faceData, CD_ORIGSPACE))
1685                                         DM_add_tessface_layer(dm, CD_ORIGSPACE, CD_DEFAULT, NULL);
1686                         
1687                         if (mti->applyModifierEM)
1688                                 ndm = mti->applyModifierEM(md, ob, em, dm);
1689                         else
1690                                 ndm = mti->applyModifier(md, ob, dm, 0, 0);
1691
1692                         if (ndm) {
1693                                 if(dm && dm != ndm)
1694                                         dm->release(dm);
1695
1696                                 dm = ndm;
1697
1698                                 if (deformedVerts) {
1699                                         MEM_freeN(deformedVerts);
1700                                         deformedVerts = NULL;
1701                                 }
1702                         }
1703                 }
1704
1705                 if(cage_r && i == cageIndex) {
1706                         if(dm && deformedVerts) {
1707                                 *cage_r = CDDM_copy(dm, 0);
1708                                 CDDM_apply_vert_coords(*cage_r, deformedVerts);
1709                         } else if(dm) {
1710                                 *cage_r = dm;
1711                         } else {
1712                                 *cage_r =
1713                                         getEditDerivedBMesh(em, ob,
1714                                                 deformedVerts ? MEM_dupallocN(deformedVerts) : NULL);
1715                         }
1716                 }
1717         }
1718
1719         BLI_linklist_free(datamasks, NULL);
1720
1721         /* Yay, we are done. If we have a DerivedMesh and deformed vertices need
1722          * to apply these back onto the DerivedMesh. If we have no DerivedMesh
1723          * then we need to build one.
1724          */
1725         if(dm && deformedVerts) {
1726                 finaldm = CDDM_copy(dm, 0);
1727
1728                 if(!(cage_r && dm == *cage_r)) dm->release(dm);
1729
1730                 CDDM_apply_vert_coords(*final_r, deformedVerts);
1731         } else if (dm) {
1732                 finaldm = dm;
1733         } else if (!deformedVerts && cage_r && *cage_r) {
1734                 finaldm = *cage_r;
1735         } else {
1736                 finaldm = getEditDerivedBMesh(em, ob, deformedVerts);
1737                 deformedVerts = NULL;
1738         }
1739
1740         finaldm->calcNormals(finaldm);
1741
1742         *final_r = finaldm;
1743
1744         /* add an orco layer if needed */
1745         if(dataMask & CD_MASK_ORCO)
1746                 add_orco_dm(ob, em, *final_r, orcodm, CD_ORCO);
1747
1748         if(orcodm)
1749                 orcodm->release(orcodm);
1750
1751         if(deformedVerts)
1752                 MEM_freeN(deformedVerts);
1753 }
1754
1755 static void clear_mesh_caches(Object *ob)
1756 {
1757         Mesh *me= ob->data;
1758
1759                 /* also serves as signal to remake texspace */
1760         if (ob->bb) {
1761                 MEM_freeN(ob->bb);
1762                 ob->bb = NULL;
1763         }
1764         if (me->bb) {
1765                 MEM_freeN(me->bb);
1766                 me->bb = NULL;
1767         }
1768
1769         freedisplist(&ob->disp);
1770
1771         if (ob->derivedFinal) {
1772                 ob->derivedFinal->needsFree = 1;
1773                 ob->derivedFinal->release(ob->derivedFinal);
1774                 ob->derivedFinal= NULL;
1775         }
1776         if (ob->derivedDeform) {
1777                 ob->derivedDeform->needsFree = 1;
1778                 ob->derivedDeform->release(ob->derivedDeform);
1779                 ob->derivedDeform= NULL;
1780         }
1781
1782         if(ob->sculpt) {
1783                 object_sculpt_modifiers_changed(ob);
1784         }
1785 }
1786
1787 static void mesh_build_data(Scene *scene, Object *ob, CustomDataMask dataMask,
1788         int build_shapekey_layers)
1789 {
1790         Object *obact = scene->basact?scene->basact->object:NULL;
1791         int editing = paint_facesel_test(ob);
1792         /* weight paint and face select need original indices because of selection buffer drawing */
1793         int needMapping = (ob==obact) && (editing || (ob->mode & (OB_MODE_WEIGHT_PAINT|OB_MODE_VERTEX_PAINT|OB_MODE_TEXTURE_PAINT)));
1794
1795         clear_mesh_caches(ob);
1796
1797         mesh_calc_modifiers(scene, ob, NULL, &ob->derivedDeform,
1798                                                 &ob->derivedFinal, 0, 1,
1799                                                 needMapping, dataMask, -1, 1, build_shapekey_layers);
1800
1801         DM_set_object_boundbox (ob, ob->derivedFinal);
1802
1803         ob->derivedFinal->needsFree = 0;
1804         ob->derivedDeform->needsFree = 0;
1805         ob->lastDataMask = dataMask;
1806 }
1807
1808 static void editbmesh_build_data(Scene *scene, Object *obedit, BMEditMesh *em, CustomDataMask dataMask)
1809 {
1810         clear_mesh_caches(obedit);
1811
1812         if (em->derivedFinal) {
1813                 if (em->derivedFinal!=em->derivedCage) {
1814                         em->derivedFinal->needsFree = 1;
1815                         em->derivedFinal->release(em->derivedFinal);
1816                 }
1817                 em->derivedFinal = NULL;
1818         }
1819         if (em->derivedCage) {
1820                 em->derivedCage->needsFree = 1;
1821                 em->derivedCage->release(em->derivedCage);
1822                 em->derivedCage = NULL;
1823         }
1824
1825         editbmesh_calc_modifiers(scene, obedit, em, &em->derivedCage, &em->derivedFinal, dataMask);
1826         DM_set_object_boundbox (obedit, em->derivedFinal);
1827
1828         em->lastDataMask = dataMask;
1829         em->derivedFinal->needsFree = 0;
1830         em->derivedCage->needsFree = 0;
1831 }
1832
1833 void makeDerivedMesh(Scene *scene, Object *ob, BMEditMesh *em,
1834         CustomDataMask dataMask, int build_shapekey_layers)
1835 {
1836         if (em) {
1837                 editbmesh_build_data(scene, ob, em, dataMask);
1838         } else {
1839                 mesh_build_data(scene, ob, dataMask, build_shapekey_layers);
1840         }
1841 }
1842
1843 /***/
1844
1845 DerivedMesh *mesh_get_derived_final(Scene *scene, Object *ob, CustomDataMask dataMask)
1846 {
1847         /* if there's no derived mesh or the last data mask used doesn't include
1848          * the data we need, rebuild the derived mesh
1849          */
1850         if(!ob->derivedFinal || (dataMask & ob->lastDataMask) != dataMask)
1851                 mesh_build_data(scene, ob, dataMask, 0);
1852
1853         return ob->derivedFinal;
1854 }
1855
1856 DerivedMesh *mesh_get_derived_deform(Scene *scene, Object *ob, CustomDataMask dataMask)
1857 {
1858         /* if there's no derived mesh or the last data mask used doesn't include
1859          * the data we need, rebuild the derived mesh
1860          */
1861         if(!ob->derivedDeform || (dataMask & ob->lastDataMask) != dataMask)
1862                 mesh_build_data(scene, ob, dataMask, 0);
1863
1864         return ob->derivedDeform;
1865 }
1866
1867 DerivedMesh *mesh_create_derived_render(Scene *scene, Object *ob, CustomDataMask dataMask)
1868 {
1869         DerivedMesh *final;
1870         
1871         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 1, 1, 0, dataMask, -1, 0, 0);
1872
1873         return final;
1874 }
1875
1876 DerivedMesh *mesh_create_derived_index_render(Scene *scene, Object *ob, CustomDataMask dataMask, int index)
1877 {
1878         DerivedMesh *final;
1879         
1880         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 1, 1, 0, dataMask, index, 0, 0);
1881
1882         return final;
1883 }
1884
1885 DerivedMesh *mesh_create_derived_view(Scene *scene, Object *ob, CustomDataMask dataMask)
1886 {
1887         DerivedMesh *final;
1888
1889         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 0, 1, 0, dataMask, -1, 0, 0);
1890
1891         return final;
1892 }
1893
1894 DerivedMesh *mesh_create_derived_no_deform(Scene *scene, Object *ob, float (*vertCos)[3],
1895                                                                                    CustomDataMask dataMask)
1896 {
1897         DerivedMesh *final;
1898         
1899         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, 0, 0, dataMask, -1, 0, 0);
1900
1901         return final;
1902 }
1903
1904 DerivedMesh *mesh_create_derived_no_virtual(Scene *scene, Object *ob, float (*vertCos)[3],
1905                                                                                         CustomDataMask dataMask)
1906 {
1907         DerivedMesh *final;
1908         
1909         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, -1, 0, dataMask, -1, 0, 0);
1910
1911         return final;
1912 }
1913
1914 DerivedMesh *mesh_create_derived_physics(Scene *scene, Object *ob, float (*vertCos)[3],
1915                                                                                         CustomDataMask dataMask)
1916 {
1917         DerivedMesh *final;
1918         
1919         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, -1, 1, dataMask, -1, 0, 0);
1920
1921         return final;
1922 }
1923
1924 DerivedMesh *mesh_create_derived_no_deform_render(Scene *scene, Object *ob,
1925                                                                                                   float (*vertCos)[3],
1926                                                                                                   CustomDataMask dataMask)
1927 {
1928         DerivedMesh *final;
1929
1930         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 1, 0, 0, dataMask, -1, 0, 0);
1931
1932         return final;
1933 }
1934
1935 /***/
1936
1937 DerivedMesh *editbmesh_get_derived_cage_and_final(Scene *scene, Object *obedit, BMEditMesh *em, DerivedMesh **final_r,
1938                                                                                                  CustomDataMask dataMask)
1939 {
1940         /* if there's no derived mesh or the last data mask used doesn't include
1941          * the data we need, rebuild the derived mesh
1942          */
1943         if(!em->derivedCage ||
1944            (em->lastDataMask & dataMask) != dataMask)
1945                 editbmesh_build_data(scene, obedit, em, dataMask);
1946
1947         *final_r = em->derivedFinal;
1948         return em->derivedCage;
1949 }
1950
1951 DerivedMesh *editbmesh_get_derived_cage(Scene *scene, Object *obedit, BMEditMesh *em, CustomDataMask dataMask)
1952 {
1953         /* if there's no derived mesh or the last data mask used doesn't include
1954          * the data we need, rebuild the derived mesh
1955          */
1956         if(!em->derivedCage ||
1957            (em->lastDataMask & dataMask) != dataMask)
1958                 editbmesh_build_data(scene, obedit, em, dataMask);
1959
1960         return em->derivedCage;
1961 }
1962
1963 DerivedMesh *editbmesh_get_derived_base(Object *obedit, BMEditMesh *em)
1964 {
1965         return getEditDerivedBMesh(em, obedit, NULL);
1966 }
1967
1968
1969 /* ********* For those who don't grasp derived stuff! (ton) :) *************** */
1970
1971 static void make_vertexcosnos__mapFunc(void *userData, int index, float *co, float *no_f, short *no_s)
1972 {
1973         float *vec = userData;
1974         
1975         vec+= 6*index;
1976
1977         /* check if we've been here before (normal should not be 0) */
1978         if(vec[3] || vec[4] || vec[5]) return;
1979
1980         copy_v3_v3(vec, co);
1981         vec+= 3;
1982         if(no_f) {
1983                 copy_v3_v3(vec, no_f);
1984         }
1985         else {
1986                 normal_short_to_float_v3(vec, no_s);
1987         }
1988 }
1989
1990 /* always returns original amount me->totvert of vertices and normals, but fully deformed and subsurfered */
1991 /* this is needed for all code using vertexgroups (no subsurf support) */
1992 /* it stores the normals as floats, but they can still be scaled as shorts (32767 = unit) */
1993 /* in use now by vertex/weight paint and particle generating */
1994
1995 float *mesh_get_mapped_verts_nors(Scene *scene, Object *ob)
1996 {
1997         Mesh *me= ob->data;
1998         DerivedMesh *dm;
1999         float *vertexcosnos;
2000         
2001         /* lets prevent crashing... */
2002         if(ob->type!=OB_MESH || me->totvert==0)
2003                 return NULL;
2004         
2005         dm= mesh_get_derived_final(scene, ob, CD_MASK_BAREMESH|CD_MASK_ORIGINDEX);
2006         vertexcosnos= MEM_callocN(6*sizeof(float)*me->totvert, "vertexcosnos map");
2007         
2008         if(dm->foreachMappedVert) {
2009                 dm->foreachMappedVert(dm, make_vertexcosnos__mapFunc, vertexcosnos);
2010         }
2011         else {
2012                 float *fp= vertexcosnos;
2013                 int a;
2014                 
2015                 for(a=0; a< me->totvert; a++, fp+=6) {
2016                         dm->getVertCo(dm, a, fp);
2017                         dm->getVertNo(dm, a, fp+3);
2018                 }
2019         }
2020         
2021         dm->release(dm);
2022         return vertexcosnos;
2023 }
2024
2025 /* ******************* GLSL ******************** */
2026
2027 typedef struct
2028 {
2029         float * precomputedFaceNormals;
2030         MTFace * mtface;        // texture coordinates
2031         MFace * mface;          // indices
2032         MVert * mvert;          // vertices & normals
2033         float (*orco)[3];
2034         float (*tangent)[4];    // destination
2035         int numTessFaces;
2036
2037 } SGLSLMeshToTangent;
2038
2039 // interface
2040 #include "mikktspace.h"
2041
2042 static int GetNumFaces(const SMikkTSpaceContext * pContext)
2043 {
2044         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2045         return pMesh->numTessFaces;
2046 }
2047
2048 static int GetNumVertsOfFace(const SMikkTSpaceContext * pContext, const int face_num)
2049 {
2050         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2051         return pMesh->mface[face_num].v4!=0 ? 4 : 3;
2052 }
2053
2054 static void GetPosition(const SMikkTSpaceContext * pContext, float fPos[], const int face_num, const int vert_index)
2055 {
2056         //assert(vert_index>=0 && vert_index<4);
2057         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2058         const float *co= pMesh->mvert[(&pMesh->mface[face_num].v1)[vert_index]].co;
2059         copy_v3_v3(fPos, co);
2060 }
2061
2062 static void GetTextureCoordinate(const SMikkTSpaceContext * pContext, float fUV[], 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         if(pMesh->mtface!=NULL) {
2068                 float * uv = pMesh->mtface[face_num].uv[vert_index];
2069                 fUV[0]=uv[0]; fUV[1]=uv[1];
2070         }
2071         else {
2072                 const float *orco= pMesh->orco[(&pMesh->mface[face_num].v1)[vert_index]];
2073                 map_to_sphere( &fUV[0], &fUV[1], orco[0], orco[1], orco[2]);
2074         }
2075 }
2076
2077 static void GetNormal(const SMikkTSpaceContext * pContext, float fNorm[], const int face_num, const int vert_index)
2078 {
2079         //assert(vert_index>=0 && vert_index<4);
2080         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2081
2082         const int smoothnormal = (pMesh->mface[face_num].flag & ME_SMOOTH);
2083         if(!smoothnormal) {     // flat
2084                 if(pMesh->precomputedFaceNormals) {
2085                         copy_v3_v3(fNorm, &pMesh->precomputedFaceNormals[3*face_num]);
2086                 }
2087                 else {
2088                         MFace *mf= &pMesh->mface[face_num];
2089                         float *p0= pMesh->mvert[mf->v1].co;
2090                         float *p1= pMesh->mvert[mf->v2].co;
2091                         float *p2= pMesh->mvert[mf->v3].co;
2092
2093                         if(mf->v4) {
2094                                 float *p3 = pMesh->mvert[mf->v4].co;
2095                                 normal_quad_v3(fNorm, p0, p1, p2, p3);
2096                         }
2097                         else {
2098                                 normal_tri_v3(fNorm, p0, p1, p2);
2099                         }
2100                 }
2101         }
2102         else {
2103                 const short *no= pMesh->mvert[(&pMesh->mface[face_num].v1)[vert_index]].no;
2104                 normal_short_to_float_v3(fNorm, no);
2105         }
2106 }
2107 static void SetTSpace(const SMikkTSpaceContext * pContext, const float fvTangent[], const float fSign, const int face_num, const int iVert)
2108 {
2109         //assert(vert_index>=0 && vert_index<4);
2110         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2111         float * pRes = pMesh->tangent[4*face_num+iVert];
2112         copy_v3_v3(pRes, fvTangent);
2113         pRes[3]=fSign;
2114 }
2115
2116
2117 void DM_add_tangent_layer(DerivedMesh *dm)
2118 {
2119         /* mesh vars */
2120         MTFace *mtface, *tf;
2121         MFace *mface, *mf;
2122         MVert *mvert, *v1, *v2, *v3, *v4;
2123         MemArena *arena= NULL;
2124         VertexTangent **vtangents= NULL;
2125         float (*orco)[3]= NULL, (*tangent)[4];
2126         float *uv1, *uv2, *uv3, *uv4, *vtang;
2127         float fno[3], tang[3], uv[4][2];
2128         int i, j, len, mf_vi[4], totvert, totface, iCalcNewMethod;
2129         float *nors;
2130
2131         if(CustomData_get_layer_index(&dm->faceData, CD_TANGENT) != -1)
2132                 return;
2133
2134         nors = dm->getTessFaceDataArray(dm, CD_NORMAL);
2135
2136         /* check we have all the needed layers */
2137         totvert= dm->getNumVerts(dm);
2138         totface= dm->getNumTessFaces(dm);
2139
2140         mvert= dm->getVertArray(dm);
2141         mface= dm->getTessFaceArray(dm);
2142         mtface= dm->getTessFaceDataArray(dm, CD_MTFACE);
2143
2144         if(!mtface) {
2145                 orco= dm->getVertDataArray(dm, CD_ORCO);
2146                 if(!orco)
2147                         return;
2148         }
2149         
2150         /* create tangent layer */
2151         DM_add_tessface_layer(dm, CD_TANGENT, CD_CALLOC, NULL);
2152         tangent= DM_get_tessface_data_layer(dm, CD_TANGENT);
2153         
2154         /* allocate some space */
2155         arena= BLI_memarena_new(BLI_MEMARENA_STD_BUFSIZE, "tangent layer arena");
2156         BLI_memarena_use_calloc(arena);
2157         vtangents= MEM_callocN(sizeof(VertexTangent*)*totvert, "VertexTangent");
2158
2159         // new computation method
2160         iCalcNewMethod = 1;
2161         if(iCalcNewMethod != 0) {
2162                 SGLSLMeshToTangent mesh2tangent= {0};
2163                 SMikkTSpaceContext sContext= {0};
2164                 SMikkTSpaceInterface sInterface= {0};
2165
2166                 mesh2tangent.precomputedFaceNormals = nors;
2167                 mesh2tangent.mtface = mtface;
2168                 mesh2tangent.mface = mface;
2169                 mesh2tangent.mvert = mvert;
2170                 mesh2tangent.orco = orco;
2171                 mesh2tangent.tangent = tangent;
2172                 mesh2tangent.numTessFaces = totface;
2173
2174                 sContext.m_pUserData = &mesh2tangent;
2175                 sContext.m_pInterface = &sInterface;
2176                 sInterface.m_getNumFaces = GetNumFaces;
2177                 sInterface.m_getNumVerticesOfFace = GetNumVertsOfFace;
2178                 sInterface.m_getPosition = GetPosition;
2179                 sInterface.m_getTexCoord = GetTextureCoordinate;
2180                 sInterface.m_getNormal = GetNormal;
2181                 sInterface.m_setTSpaceBasic = SetTSpace;
2182
2183                 // 0 if failed
2184                 iCalcNewMethod = genTangSpaceDefault(&sContext);
2185         }
2186
2187         if(!iCalcNewMethod) {
2188                 /* sum tangents at connected vertices */
2189                 for(i=0, tf=mtface, mf=mface; i < totface; mf++, tf++, i++) {
2190                         v1= &mvert[mf->v1];
2191                         v2= &mvert[mf->v2];
2192                         v3= &mvert[mf->v3];
2193
2194                         if (mf->v4) {
2195                                 v4= &mvert[mf->v4];
2196                                 normal_quad_v3( fno,v4->co, v3->co, v2->co, v1->co);
2197                         }
2198                         else {
2199                                 v4= NULL;
2200                                 normal_tri_v3( fno,v3->co, v2->co, v1->co);
2201                         }
2202                 
2203                         if(mtface) {
2204                                 uv1= tf->uv[0];
2205                                 uv2= tf->uv[1];
2206                                 uv3= tf->uv[2];
2207                                 uv4= tf->uv[3];
2208                         }
2209                         else {
2210                                 uv1= uv[0]; uv2= uv[1]; uv3= uv[2]; uv4= uv[3];
2211                                 map_to_sphere( &uv[0][0], &uv[0][1],orco[mf->v1][0], orco[mf->v1][1], orco[mf->v1][2]);
2212                                 map_to_sphere( &uv[1][0], &uv[1][1],orco[mf->v2][0], orco[mf->v2][1], orco[mf->v2][2]);
2213                                 map_to_sphere( &uv[2][0], &uv[2][1],orco[mf->v3][0], orco[mf->v3][1], orco[mf->v3][2]);
2214                                 if(v4)
2215                                         map_to_sphere( &uv[3][0], &uv[3][1],orco[mf->v4][0], orco[mf->v4][1], orco[mf->v4][2]);
2216                         }
2217                 
2218                         tangent_from_uv(uv1, uv2, uv3, v1->co, v2->co, v3->co, fno, tang);
2219                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v1], tang, uv1);
2220                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v2], tang, uv2);
2221                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v3], tang, uv3);
2222                 
2223                         if(mf->v4) {
2224                                 v4= &mvert[mf->v4];
2225                         
2226                                 tangent_from_uv(uv1, uv3, uv4, v1->co, v3->co, v4->co, fno, tang);
2227                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v1], tang, uv1);
2228                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v3], tang, uv3);
2229                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v4], tang, uv4);
2230                         }
2231                 }
2232         
2233                 /* write tangent to layer */
2234                 for(i=0, tf=mtface, mf=mface; i < totface; mf++, tf++, i++, tangent+=4) {
2235                         len= (mf->v4)? 4 : 3; 
2236
2237                         if(mtface == NULL) {
2238                                 map_to_sphere( &uv[0][0], &uv[0][1],orco[mf->v1][0], orco[mf->v1][1], orco[mf->v1][2]);
2239                                 map_to_sphere( &uv[1][0], &uv[1][1],orco[mf->v2][0], orco[mf->v2][1], orco[mf->v2][2]);
2240                                 map_to_sphere( &uv[2][0], &uv[2][1],orco[mf->v3][0], orco[mf->v3][1], orco[mf->v3][2]);
2241                                 if(len==4)
2242                                         map_to_sphere( &uv[3][0], &uv[3][1],orco[mf->v4][0], orco[mf->v4][1], orco[mf->v4][2]);
2243                         }
2244                 
2245                         mf_vi[0]= mf->v1;
2246                         mf_vi[1]= mf->v2;
2247                         mf_vi[2]= mf->v3;
2248                         mf_vi[3]= mf->v4;
2249                 
2250                         for(j=0; j<len; j++) {
2251                                 vtang= find_vertex_tangent(vtangents[mf_vi[j]], mtface ? tf->uv[j] : uv[j]);
2252                                 normalize_v3_v3(tangent[j], vtang);
2253                                 ((float *) tangent[j])[3]=1.0f;
2254                         }
2255                 }
2256         }
2257         
2258         BLI_memarena_free(arena);
2259         MEM_freeN(vtangents);
2260 }
2261
2262 void DM_calc_auto_bump_scale(DerivedMesh *dm)
2263 {
2264         /* int totvert= dm->getNumVerts(dm); */ /* UNUSED */
2265         int totface= dm->getNumTessFaces(dm);
2266
2267         MVert * mvert = dm->getVertArray(dm);
2268         MFace * mface = dm->getTessFaceArray(dm);
2269         MTFace * mtface = dm->getTessFaceDataArray(dm, CD_MTFACE);
2270
2271         if(mtface)
2272         {
2273                 double dsum = 0.0;
2274                 int nr_accumulated = 0;
2275                 int f;
2276
2277                 for ( f=0; f<totface; f++ )
2278                 {
2279                         {
2280                                 float * verts[4], * tex_coords[4];
2281                                 const int nr_verts = mface[f].v4!=0 ? 4 : 3;
2282                                 int i, is_degenerate;
2283
2284                                 verts[0]=mvert[mface[f].v1].co; verts[1]=mvert[mface[f].v2].co; verts[2]=mvert[mface[f].v3].co;
2285                                 tex_coords[0]=mtface[f].uv[0]; tex_coords[1]=mtface[f].uv[1]; tex_coords[2]=mtface[f].uv[2];
2286                                 if(nr_verts==4)
2287                                 {
2288                                         verts[3]=mvert[mface[f].v4].co;
2289                                         tex_coords[3]=mtface[f].uv[3];
2290                                 }
2291
2292                                 // discard degenerate faces
2293                                 is_degenerate = 0;
2294                                 if(     equals_v3v3(verts[0], verts[1]) || equals_v3v3(verts[0], verts[2]) || equals_v3v3(verts[1], verts[2]) ||
2295                                         equals_v2v2(tex_coords[0], tex_coords[1]) || equals_v2v2(tex_coords[0], tex_coords[2]) || equals_v2v2(tex_coords[1], tex_coords[2]) )
2296                                 {
2297                                         is_degenerate = 1;
2298                                 }
2299
2300                                 // verify last vertex as well if this is a quad
2301                                 if ( is_degenerate==0 && nr_verts==4 )
2302                                 {
2303                                         if(     equals_v3v3(verts[3], verts[0]) || equals_v3v3(verts[3], verts[1]) || equals_v3v3(verts[3], verts[2]) ||
2304                                                 equals_v2v2(tex_coords[3], tex_coords[0]) || equals_v2v2(tex_coords[3], tex_coords[1]) || equals_v2v2(tex_coords[3], tex_coords[2]) )
2305                                         {
2306                                                 is_degenerate = 1;
2307                                         }
2308
2309                                         // verify the winding is consistent
2310                                         if ( is_degenerate==0 )
2311                                         {
2312                                                 float prev_edge[2];
2313                                                 int is_signed = 0;
2314                                                 sub_v2_v2v2(prev_edge, tex_coords[0], tex_coords[3]);
2315
2316                                                 i = 0;
2317                                                 while ( is_degenerate==0 && i<4 )
2318                                                 {
2319                                                         float cur_edge[2], signed_area;
2320                                                         sub_v2_v2v2(cur_edge, tex_coords[(i+1)&0x3], tex_coords[i]);
2321                                                         signed_area = prev_edge[0]*cur_edge[1] - prev_edge[1]*cur_edge[0];
2322                                                         if ( i==0 ) is_signed = signed_area<0.0f ? 1 : 0;
2323                                                         else if((is_signed!=0)!=(signed_area<0.0f)) is_degenerate=1;
2324
2325                                                         if ( is_degenerate==0 )
2326                                                         {
2327                                                                 copy_v2_v2(prev_edge, cur_edge);
2328                                                                 ++i;
2329                                                         }
2330                                                 }
2331                                         }
2332                                 }
2333
2334                                 // proceed if not a degenerate face
2335                                 if ( is_degenerate==0 )
2336                                 {
2337                                         int nr_tris_to_pile=0;
2338                                         // quads split at shortest diagonal
2339                                         int offs = 0;           // initial triangulation is 0,1,2 and 0, 2, 3
2340                                         if ( nr_verts==4 )
2341                                         {
2342                                                 float pos_len_diag0, pos_len_diag1;
2343                                                 float vtmp[3];
2344                                                 sub_v3_v3v3(vtmp, verts[2], verts[0]);
2345                                                 pos_len_diag0 = dot_v3v3(vtmp, vtmp);
2346                                                 sub_v3_v3v3(vtmp, verts[3], verts[1]);
2347                                                 pos_len_diag1 = dot_v3v3(vtmp, vtmp);
2348
2349                                                 if(pos_len_diag1<pos_len_diag0)
2350                                                         offs=1;         // alter split
2351                                                 else if(pos_len_diag0==pos_len_diag1)           // do UV check instead
2352                                                 {
2353                                                         float tex_len_diag0, tex_len_diag1;
2354
2355                                                         sub_v2_v2v2(vtmp, tex_coords[2], tex_coords[0]);
2356                                                         tex_len_diag0 = dot_v2v2(vtmp, vtmp);
2357                                                         sub_v2_v2v2(vtmp, tex_coords[3], tex_coords[1]);
2358                                                         tex_len_diag1 = dot_v2v2(vtmp, vtmp);
2359
2360                                                         if(tex_len_diag1<tex_len_diag0)
2361                                                         {
2362                                                                 offs=1;         // alter split
2363                                                         }
2364                                                 }
2365                                         }
2366                                         nr_tris_to_pile = nr_verts-2 ;
2367                                         if ( nr_tris_to_pile==1 || nr_tris_to_pile==2 )
2368                                         {
2369                                                 const int indices[] = {offs+0, offs+1, offs+2, offs+0, offs+2, (offs+3)&0x3 };
2370                                                 int t;
2371                                                 for ( t=0; t<nr_tris_to_pile; t++ )
2372                                                 {
2373                                                         float f2x_area_uv;
2374                                                         float * p0 = verts[indices[t*3+0]];
2375                                                         float * p1 = verts[indices[t*3+1]];
2376                                                         float * p2 = verts[indices[t*3+2]];
2377
2378                                                         float edge_t0[2], edge_t1[2];
2379                                                         sub_v2_v2v2(edge_t0, tex_coords[indices[t*3+1]], tex_coords[indices[t*3+0]]);
2380                                                         sub_v2_v2v2(edge_t1, tex_coords[indices[t*3+2]], tex_coords[indices[t*3+0]]);
2381
2382                                                         f2x_area_uv = fabsf(edge_t0[0]*edge_t1[1] - edge_t0[1]*edge_t1[0]);
2383                                                         if ( f2x_area_uv>FLT_EPSILON )
2384                                                         {
2385                                                                 float norm[3], v0[3], v1[3], f2x_surf_area, fsurf_ratio;
2386                                                                 sub_v3_v3v3(v0, p1, p0);
2387                                                                 sub_v3_v3v3(v1, p2, p0);
2388                                                                 cross_v3_v3v3(norm, v0, v1);
2389
2390                                                                 f2x_surf_area = len_v3(norm);
2391                                                                 fsurf_ratio = f2x_surf_area/f2x_area_uv;        // tri area divided by texture area
2392
2393                                                                 ++nr_accumulated;
2394                                                                 dsum += (double)(fsurf_ratio);
2395                                                         }
2396                                                 }
2397                                         }
2398                                 }
2399                         }
2400                 }
2401
2402                 // finalize
2403                 {
2404                         const float avg_area_ratio = (nr_accumulated>0) ? ((float)(dsum / nr_accumulated)) : 1.0f;
2405                         const float use_as_render_bump_scale = sqrtf(avg_area_ratio);           // use width of average surface ratio as your bump scale
2406                         dm->auto_bump_scale = use_as_render_bump_scale;
2407                 }
2408         }
2409         else
2410         {
2411                 dm->auto_bump_scale = 1.0f;
2412         }
2413 }
2414
2415 void DM_vertex_attributes_from_gpu(DerivedMesh *dm, GPUVertexAttribs *gattribs, DMVertexAttribs *attribs)
2416 {
2417         CustomData *vdata, *fdata, *tfdata = NULL;
2418         int a, b, layer;
2419
2420         /* From the layers requested by the GLSL shader, figure out which ones are
2421          * actually available for this derivedmesh, and retrieve the pointers */
2422
2423         memset(attribs, 0, sizeof(DMVertexAttribs));
2424
2425         vdata = &dm->vertData;
2426         fdata = tfdata = dm->getTessFaceDataLayout(dm);
2427         
2428         /* calc auto bump scale if necessary */
2429         if(dm->auto_bump_scale<=0.0f)
2430                 DM_calc_auto_bump_scale(dm);
2431
2432         /* add a tangent layer if necessary */
2433         for(b = 0; b < gattribs->totlayer; b++)
2434                 if(gattribs->layer[b].type == CD_TANGENT)
2435                         if(CustomData_get_layer_index(fdata, CD_TANGENT) == -1)
2436                                 DM_add_tangent_layer(dm);
2437
2438         for(b = 0; b < gattribs->totlayer; b++) {
2439                 if(gattribs->layer[b].type == CD_MTFACE) {
2440                         /* uv coordinates */
2441                         if(gattribs->layer[b].name[0])
2442                                 layer = CustomData_get_named_layer_index(tfdata, CD_MTFACE,
2443                                         gattribs->layer[b].name);
2444                         else
2445                                 layer = CustomData_get_active_layer_index(tfdata, CD_MTFACE);
2446
2447                         if(layer != -1) {
2448                                 a = attribs->tottface++;
2449
2450                                 attribs->tface[a].array = tfdata->layers[layer].data;
2451                                 attribs->tface[a].emOffset = tfdata->layers[layer].offset;
2452                                 attribs->tface[a].glIndex = gattribs->layer[b].glindex;
2453                                 /* attribs->tface[a].glTexco = gattribs->layer[b].gltexco; */ /* BMESH_TODO, trunk has this but not bmesh, need to investigate whats going on here - campbell */
2454                         }
2455                         /* BMESH ONLY, may need to get this working?, otherwise remove */
2456                         /* else {
2457                                 int player;
2458                                 CustomData *pdata = dm->getPolyDataLayout(dm);
2459                                 
2460                                 if(gattribs->layer[b].name[0])
2461                                         player = CustomData_get_named_layer_index(pdata, CD_MTEXPOLY,
2462                                                 gattribs->layer[b].name);
2463                                 else
2464                                         player = CustomData_get_active_layer_index(pdata, CD_MTEXPOLY);
2465                                 
2466                                 if (player != -1) {
2467                                         a = attribs->tottface++;
2468         
2469                                         attribs->tface[a].array = NULL;
2470                                         attribs->tface[a].emOffset = pdata->layers[layer].offset;
2471                                         attribs->tface[a].glIndex = gattribs->layer[b].glindex;
2472                                         attribs->tface[a].glTexco = gattribs->layer[b].gltexco;
2473                                         
2474                                 }
2475                         }
2476                         */
2477                 }
2478                 else if(gattribs->layer[b].type == CD_MCOL) {
2479                         /* vertex colors */
2480                         if(gattribs->layer[b].name[0])
2481                                 layer = CustomData_get_named_layer_index(tfdata, CD_MCOL,
2482                                         gattribs->layer[b].name);
2483                         else
2484                                 layer = CustomData_get_active_layer_index(tfdata, CD_MCOL);
2485
2486                         if(layer != -1) {
2487                                 a = attribs->totmcol++;
2488
2489                                 attribs->mcol[a].array = tfdata->layers[layer].data;
2490                                 attribs->mcol[a].emOffset = tfdata->layers[layer].offset;
2491                                 attribs->mcol[a].glIndex = gattribs->layer[b].glindex;
2492                         }
2493                 }
2494                 else if(gattribs->layer[b].type == CD_TANGENT) {
2495                         /* tangents */
2496                         layer = CustomData_get_layer_index(fdata, CD_TANGENT);
2497
2498                         if(layer != -1) {
2499                                 attribs->tottang = 1;
2500
2501                                 attribs->tang.array = fdata->layers[layer].data;
2502                                 attribs->tang.emOffset = fdata->layers[layer].offset;
2503                                 attribs->tang.glIndex = gattribs->layer[b].glindex;
2504                         }
2505                 }
2506                 else if(gattribs->layer[b].type == CD_ORCO) {
2507                         /* original coordinates */
2508                         layer = CustomData_get_layer_index(vdata, CD_ORCO);
2509
2510                         if(layer != -1) {
2511                                 attribs->totorco = 1;
2512
2513                                 attribs->orco.array = vdata->layers[layer].data;
2514                                 attribs->orco.emOffset = vdata->layers[layer].offset;
2515                                 attribs->orco.glIndex = gattribs->layer[b].glindex;
2516                                 attribs->orco.glTexco = gattribs->layer[b].gltexco;
2517                         }
2518                 }
2519         }
2520 }
2521
2522 /* Set object's bounding box based on DerivedMesh min/max data */
2523 void DM_set_object_boundbox(Object *ob, DerivedMesh *dm)
2524 {
2525         float min[3], max[3];
2526
2527         INIT_MINMAX(min, max);
2528
2529         dm->getMinMax(dm, min, max);
2530
2531         if(!ob->bb)
2532                 ob->bb= MEM_callocN(sizeof(BoundBox), "DM-BoundBox");
2533
2534         boundbox_set_from_min_max(ob->bb, min, max);
2535 }
2536
2537 /* --- NAVMESH (begin) --- */
2538 #ifdef WITH_GAMEENGINE
2539
2540 BM_INLINE int navmesh_bit(int a, int b)
2541 {
2542         return (a & (1 << b)) >> b;
2543 }
2544
2545 BM_INLINE void navmesh_intToCol(int i, float col[3])
2546 {
2547         int     r = navmesh_bit(i, 0) + navmesh_bit(i, 3) * 2 + 1;
2548         int     g = navmesh_bit(i, 1) + navmesh_bit(i, 4) * 2 + 1;
2549         int     b = navmesh_bit(i, 2) + navmesh_bit(i, 5) * 2 + 1;
2550         col[0] = 1 - r*63.0f/255.0f;
2551         col[1] = 1 - g*63.0f/255.0f;
2552         col[2] = 1 - b*63.0f/255.0f;
2553 }
2554
2555 static void navmesh_drawColored(DerivedMesh *dm)
2556 {
2557         int a, glmode;
2558         MVert *mvert = (MVert *)CustomData_get_layer(&dm->vertData, CD_MVERT);
2559         MFace *mface = (MFace *)CustomData_get_layer(&dm->faceData, CD_MFACE);
2560         int *polygonIdx = (int *)CustomData_get_layer(&dm->faceData, CD_RECAST);
2561         float col[3];
2562
2563         if (!polygonIdx)
2564                 return;
2565
2566         /*
2567         //UI_ThemeColor(TH_WIRE);
2568         glDisable(GL_LIGHTING);
2569         glLineWidth(2.0);
2570         dm->drawEdges(dm, 0, 1);
2571         glLineWidth(1.0);
2572         glEnable(GL_LIGHTING);*/
2573
2574         glDisable(GL_LIGHTING);
2575         /*  if(GPU_buffer_legacy(dm) ) */ { /* TODO - VBO draw code, not high priority - campbell */
2576                 DEBUG_VBO( "Using legacy code. drawNavMeshColored\n" );
2577                 //glShadeModel(GL_SMOOTH);
2578                 glBegin(glmode = GL_QUADS);
2579                 for(a = 0; a < dm->numTessFaceData; a++, mface++) {
2580                         int new_glmode = mface->v4?GL_QUADS:GL_TRIANGLES;
2581                         int pi = polygonIdx[a];
2582                         if (pi <= 0) {
2583                                 zero_v3(col);
2584                         }
2585                         else {
2586                                 navmesh_intToCol(pi, col);
2587                         }
2588
2589                         if(new_glmode != glmode) {
2590                                 glEnd();
2591                                 glBegin(glmode = new_glmode);
2592                         }
2593                         glColor3fv(col);
2594                         glVertex3fv(mvert[mface->v1].co);
2595                         glVertex3fv(mvert[mface->v2].co);
2596                         glVertex3fv(mvert[mface->v3].co);
2597                         if(mface->v4) {
2598                                 glVertex3fv(mvert[mface->v4].co);
2599                         }
2600                 }
2601                 glEnd();
2602         }
2603         glEnable(GL_LIGHTING);
2604 }
2605
2606 static void navmesh_DM_drawFacesTex(DerivedMesh *dm,
2607                         int (*setDrawOptions)(MTFace *tface, int has_mcol, int matnr),
2608                         int (*compareDrawOptions)(void *userData, int cur_index, int next_index),
2609                         void *userData)
2610 {
2611         (void) setDrawOptions;
2612         (void) compareDrawOptions;
2613         (void) userData;
2614
2615         navmesh_drawColored(dm);
2616 }
2617
2618 static void navmesh_DM_drawFacesSolid(DerivedMesh *dm,
2619                                       float (*partial_redraw_planes)[4],
2620                                       int UNUSED(fast), int (*setMaterial)(int, void *attribs))
2621 {
2622         (void) partial_redraw_planes;
2623         (void) setMaterial;
2624
2625         //drawFacesSolid_original(dm, partial_redraw_planes, fast, setMaterial);
2626         navmesh_drawColored(dm);
2627 }
2628
2629 static DerivedMesh *navmesh_dm_createNavMeshForVisualization(DerivedMesh *dm)
2630 {
2631         DerivedMesh *result;
2632         int maxFaces = dm->getNumPolys(dm);
2633         int *recastData;
2634         int vertsPerPoly=0, nverts=0, ndtris=0, npolys=0;
2635         float* verts=NULL;
2636         unsigned short *dtris=NULL, *dmeshes=NULL, *polys=NULL;
2637         int *dtrisToPolysMap=NULL, *dtrisToTrisMap=NULL, *trisToFacesMap=NULL;
2638         int res;
2639
2640         result = CDDM_copy(dm, 0);
2641         if (!CustomData_has_layer(&result->faceData, CD_RECAST)) {
2642                 int *sourceRecastData = (int*)CustomData_get_layer(&dm->faceData, CD_RECAST);
2643                 if (sourceRecastData) {
2644                         CustomData_add_layer_named(&result->faceData, CD_RECAST, CD_DUPLICATE,
2645                                                    sourceRecastData, maxFaces, "recastData");
2646                 }
2647         }
2648         recastData = (int*)CustomData_get_layer(&result->faceData, CD_RECAST);
2649
2650         /* note: This is not good design! - really should not be doing this */
2651         result->drawFacesTex =  navmesh_DM_drawFacesTex;
2652         result->drawFacesSolid = navmesh_DM_drawFacesSolid;
2653
2654
2655         /* process mesh */
2656         res  = buildNavMeshDataByDerivedMesh(dm, &vertsPerPoly, &nverts, &verts, &ndtris, &dtris,
2657                                              &npolys, &dmeshes, &polys, &dtrisToPolysMap, &dtrisToTrisMap,
2658                                              &trisToFacesMap);
2659         if (res) {
2660                 size_t polyIdx;
2661
2662                 /* invalidate concave polygon */
2663                 for (polyIdx=0; polyIdx<(size_t)npolys; polyIdx++) {
2664                         unsigned short* poly = &polys[polyIdx*2*vertsPerPoly];
2665                         if (!polyIsConvex(poly, vertsPerPoly, verts)) {
2666                                 /* set negative polygon idx to all faces */
2667                                 unsigned short *dmesh = &dmeshes[4*polyIdx];
2668                                 unsigned short tbase = dmesh[2];
2669                                 unsigned short tnum = dmesh[3];
2670                                 unsigned short ti;
2671
2672                                 for (ti=0; ti<tnum; ti++) {
2673                                         unsigned short triidx = dtrisToTrisMap[tbase+ti];
2674                                         unsigned short faceidx = trisToFacesMap[triidx];
2675                                         if (recastData[faceidx] > 0) {
2676                                                 recastData[faceidx] = -recastData[faceidx];
2677                                         }
2678                                 }
2679                         }
2680                 }
2681         }
2682         else {
2683                 printf("Error during creation polygon infos\n");
2684         }
2685
2686         /* clean up */
2687         if (verts!=NULL)
2688                 MEM_freeN(verts);
2689         if (dtris!=NULL)
2690                 MEM_freeN(dtris);
2691         if (dmeshes!=NULL)
2692                 MEM_freeN(dmeshes);
2693         if (polys!=NULL)
2694                 MEM_freeN(polys);
2695         if (dtrisToPolysMap!=NULL)
2696                 MEM_freeN(dtrisToPolysMap);
2697         if (dtrisToTrisMap!=NULL)
2698                 MEM_freeN(dtrisToTrisMap);
2699         if (trisToFacesMap!=NULL)
2700                 MEM_freeN(trisToFacesMap);
2701
2702         return result;
2703 }
2704
2705 #endif /* WITH_GAMEENGINE */
2706
2707 /* --- NAVMESH (end) --- */