svn merge ^/trunk/blender -r42564:42586
[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 calc_weightpaint_vert_color(
887         Object *ob, const int defbase_tot, ColorBand *coba, int vert, unsigned char *col,
888         const char *dg_flags, int selected, int UNUSED(unselected), const int draw_flag)
889 {
890         Mesh *me = ob->data;
891         float input = 0.0f;
892         
893         int make_black= FALSE;
894
895         if (me->dvert) {
896                 MDeformVert *dvert= &me->dvert[vert];
897
898                 if ((selected > 1) && (draw_flag & CALC_WP_MULTIPAINT)) {
899                         int was_a_nonzero= FALSE;
900                         int i;
901
902                         MDeformWeight *dw= dvert->dw;
903                         for (i = dvert->totweight; i > 0; i--, dw++) {
904                                 /* in multipaint, get the average if auto normalize is inactive
905                                  * get the sum if it is active */
906                                 if (dw->def_nr < defbase_tot) {
907                                         if (dg_flags[dw->def_nr]) {
908                                                 if (dw->weight) {
909                                                         input += dw->weight;
910                                                         was_a_nonzero= TRUE;
911                                                 }
912                                         }
913                                 }
914                         }
915
916                         /* make it black if the selected groups have no weight on a vertex */
917                         if (was_a_nonzero == FALSE) {
918                                 make_black = TRUE;
919                         }
920                         else if ((draw_flag & CALC_WP_AUTO_NORMALIZE) == FALSE) {
921                                 input /= selected; /* get the average */
922                         }
923                 }
924                 else {
925                         /* default, non tricky behavior */
926                         input= defvert_find_weight(dvert, ob->actdef-1);
927                 }
928         }
929         
930         if (make_black) {
931                 col[3] = 0;
932                 col[2] = 0;
933                 col[1] = 0;
934                 col[0] = 255;
935         }
936         else {
937                 float colf[4];
938                 CLAMP(input, 0.0f, 1.0f);
939
940                 if(coba) do_colorband(coba, input, colf);
941                 else     weight_to_rgb(colf, input);
942
943                 col[3] = (unsigned char)(colf[0] * 255.0f);
944                 col[2] = (unsigned char)(colf[1] * 255.0f);
945                 col[1] = (unsigned char)(colf[2] * 255.0f);
946                 col[0] = 255;
947         }
948 }
949
950 static ColorBand *stored_cb= NULL;
951
952 void vDM_ColorBand_store(ColorBand *coba)
953 {
954         stored_cb= coba;
955 }
956
957 static void add_weight_mcol_dm(Object *ob, DerivedMesh *dm, int const draw_flag)
958 {
959         // Mesh *me = ob->data; // UNUSED
960         MFace *mf = dm->getTessFaceArray(dm);
961         MLoop *mloop = dm->getLoopArray(dm), *ml;
962         MPoly *mp = dm->getPolyArray(dm);
963         ColorBand *coba= stored_cb;     /* warning, not a local var */
964         unsigned char *wtcol;
965         unsigned char(*wlcol)[4] = NULL;
966         BLI_array_declare(wlcol);
967         int i, j, totface=dm->getNumTessFaces(dm), totloop;
968         int *origIndex = dm->getVertDataArray(dm, CD_ORIGINDEX);
969
970         int defbase_tot = BLI_countlist(&ob->defbase);
971         char *defbase_sel = MEM_mallocN(defbase_tot * sizeof(char), __func__);
972         int selected = get_selected_defgroups(ob, defbase_sel, defbase_tot);
973         int unselected = defbase_tot - selected;
974
975         wtcol = MEM_callocN (sizeof (unsigned char) * totface*4*4, "weightmap");
976         
977         /*first add colors to the tesselation faces*/
978         memset(wtcol, 0x55, sizeof (unsigned char) * totface*4*4);
979         for (i=0; i<totface; i++, mf++) {
980                 /*origindex being NULL means we're operating on original mesh data*/
981                 calc_weightpaint_vert_color(ob, defbase_tot, coba, mf->v1, &wtcol[(i*4 + 0)*4], defbase_sel, selected, unselected, draw_flag);
982                 calc_weightpaint_vert_color(ob, defbase_tot, coba, mf->v2, &wtcol[(i*4 + 1)*4], defbase_sel, selected, unselected, draw_flag);
983                 calc_weightpaint_vert_color(ob, defbase_tot, coba, mf->v3, &wtcol[(i*4 + 2)*4], defbase_sel, selected, unselected, draw_flag);
984                 if (mf->v4)
985                         calc_weightpaint_vert_color(ob, defbase_tot, coba, mf->v4, &wtcol[(i*4 + 3)*4], defbase_sel, selected, unselected, draw_flag);
986         }
987         
988         CustomData_add_layer(&dm->faceData, CD_WEIGHT_MCOL, CD_ASSIGN, wtcol, totface);
989
990         /*now add to loops, so the data can be passed through the modifier stack*/
991         totloop = 0;
992         for (i=0; i<dm->numPolyData; i++, mp++) {
993                 ml = mloop + mp->loopstart;
994
995                 for (j=0; j<mp->totloop; j++, ml++, totloop++) {
996                         BLI_array_growone(wlcol);
997
998                         calc_weightpaint_vert_color(ob, defbase_tot, coba, origIndex ? origIndex[ml->v] : ml->v,
999                                                                                 (unsigned char *)&wlcol[totloop], defbase_sel, selected, unselected, draw_flag);
1000                 }
1001         }
1002
1003         MEM_freeN(defbase_sel);
1004
1005         CustomData_add_layer(&dm->loopData, CD_WEIGHT_MLOOPCOL, CD_ASSIGN, wlcol, totloop);
1006 }
1007
1008
1009 static void shapekey_layers_to_keyblocks(DerivedMesh *dm, Mesh *me, int actshape_uid)
1010 {
1011         KeyBlock *kb;
1012         int i, j, tot;
1013         
1014         if (!me->key)
1015                 return; 
1016         
1017         tot = CustomData_number_of_layers(&dm->vertData, CD_SHAPEKEY);
1018         for (i=0; i<tot; i++) {
1019                 CustomDataLayer *layer = &dm->vertData.layers[CustomData_get_layer_index_n(&dm->vertData, CD_SHAPEKEY, i)];
1020                 float (*cos)[3], (*kbcos)[3];
1021                 
1022                 for (kb=me->key->block.first; kb; kb=kb->next) {
1023                         if (kb->uid == layer->uid)
1024                                 break;
1025                 }
1026                 
1027                 if (!kb) {
1028                         kb = add_keyblock(me->key, layer->name);
1029                         kb->uid = layer->uid;
1030                 }
1031                 
1032                 if (kb->data)
1033                         MEM_freeN(kb->data);
1034                 
1035                 cos = CustomData_get_layer_n(&dm->vertData, CD_SHAPEKEY, i);
1036                 kb->totelem = dm->numVertData;
1037
1038                 kb->data = kbcos = MEM_mallocN(sizeof(float)*3*kb->totelem, "kbcos DerivedMesh.c");
1039                 if (kb->uid == actshape_uid) {
1040                         MVert *mvert = dm->getVertArray(dm);
1041                         
1042                         for (j=0; j<dm->numVertData; j++, kbcos++, mvert++) {
1043                                 copy_v3_v3(*kbcos, mvert->co);
1044                         }
1045                 } else {
1046                         for (j=0; j<kb->totelem; j++, cos++, kbcos++) {
1047                                 copy_v3_v3(*kbcos, *cos);
1048                         }
1049                 }
1050         }
1051         
1052         for (kb=me->key->block.first; kb; kb=kb->next) {
1053                 if (kb->totelem != dm->numVertData) {
1054                         if (kb->data)
1055                                 MEM_freeN(kb->data);
1056                         
1057                         kb->totelem = dm->numVertData;
1058                         kb->data = MEM_callocN(sizeof(float)*3*kb->totelem, "kb->data derivedmesh.c");
1059                         fprintf(stderr, "%s: lost a shapekey layer! (bmesh internal error)\n", __func__);
1060                 }
1061         }
1062 }
1063
1064 static void add_shapekey_layers(DerivedMesh *dm, Mesh *me, Object *UNUSED(ob))
1065 {
1066         KeyBlock *kb;
1067         Key *key = me->key;
1068         int a, b;
1069         
1070         if (!me->key)
1071                 return;
1072         
1073         if (dm->numVertData != me->totvert) {
1074                 printf("error in add_shapekey_layers: dm isn't the same size as me\n");
1075                 return;
1076         }
1077                 
1078         for (a=0, kb=key->block.first; kb; kb=kb->next, a++) {
1079                 float (*cos)[3] = CustomData_add_layer_named(&dm->vertData, CD_SHAPEKEY, CD_CALLOC, NULL, dm->numVertData, kb->name);
1080                 int ci = CustomData_get_layer_index_n(&dm->vertData, CD_SHAPEKEY, a);
1081                 
1082                 dm->vertData.layers[ci].uid = kb->uid;
1083                 if (kb->totelem != dm->numVertData) {
1084                         printf("error in add_shapekey_layers: totelem and totvert don't match");
1085                         continue;
1086                 }
1087                 
1088                 for (b=0; b<kb->totelem; b++, cos++) {
1089                         copy_v3_v3((float *)cos, ((float*)kb->data)+b*3);
1090                 }
1091         }
1092 }
1093
1094 /* new value for useDeform -1  (hack for the gameengine):
1095  * - apply only the modifier stack of the object, skipping the virtual modifiers,
1096  * - don't apply the key
1097  * - apply deform modifiers and input vertexco
1098  */
1099 static void mesh_calc_modifiers(Scene *scene, Object *ob, float (*inputVertexCos)[3],
1100                                                                 DerivedMesh **deform_r, DerivedMesh **final_r,
1101                                                                 int useRenderParams, int useDeform,
1102                                                                 int needMapping, CustomDataMask dataMask, 
1103                                                                 int index, int useCache, int build_shapekey_layers)
1104 {
1105         Mesh *me = ob->data;
1106         ModifierData *firstmd, *md;
1107         LinkNode *datamasks, *curr;
1108         CustomDataMask mask, nextmask, append_mask = 0;
1109         float (*deformedVerts)[3] = NULL;
1110         DerivedMesh *dm=NULL, *orcodm, *clothorcodm, *finaldm;
1111         int numVerts = me->totvert;
1112         int required_mode;
1113         int isPrevDeform= FALSE;
1114         int skipVirtualArmature = (useDeform < 0);
1115         MultiresModifierData *mmd= get_multires_modifier(scene, ob, 0);
1116         int has_multires = mmd != NULL, multires_applied = 0;
1117         int sculpt_mode = ob->mode & OB_MODE_SCULPT && ob->sculpt;
1118
1119         int draw_flag= ((scene->toolsettings->multipaint ? CALC_WP_MULTIPAINT : 0) |
1120                         (scene->toolsettings->auto_normalize ? CALC_WP_AUTO_NORMALIZE : 0));
1121
1122         if(mmd && !mmd->sculptlvl)
1123                 has_multires = 0;
1124
1125         if(!skipVirtualArmature) {
1126                 firstmd = modifiers_getVirtualModifierList(ob);
1127         }
1128         else {
1129                 /* game engine exception */
1130                 firstmd = ob->modifiers.first;
1131                 if(firstmd && firstmd->type == eModifierType_Armature)
1132                         firstmd = firstmd->next;
1133         }
1134
1135         md = firstmd;
1136
1137         modifiers_clearErrors(ob);
1138
1139         if(useRenderParams) required_mode = eModifierMode_Render;
1140         else required_mode = eModifierMode_Realtime;
1141
1142         datamasks = modifiers_calcDataMasks(scene, ob, md, dataMask, required_mode);
1143         curr = datamasks;
1144
1145         if(deform_r) *deform_r = NULL;
1146         *final_r = NULL;
1147
1148         if(useDeform) {
1149                 if(inputVertexCos)
1150                         deformedVerts = inputVertexCos;
1151                 
1152                 /* Apply all leading deforming modifiers */
1153                 for(;md; md = md->next, curr = curr->next) {
1154                         ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1155
1156                         md->scene= scene;
1157                         
1158                         if(!modifier_isEnabled(scene, md, required_mode)) continue;
1159                         if(useDeform < 0 && mti->dependsOnTime && mti->dependsOnTime(md)) continue;
1160
1161                         if(mti->type == eModifierTypeType_OnlyDeform) {
1162                                 if(!deformedVerts)
1163                                         deformedVerts = mesh_getVertexCos(me, &numVerts);
1164
1165                                 mti->deformVerts(md, ob, NULL, deformedVerts, numVerts, useRenderParams, useDeform);
1166                         } else {
1167                                 break;
1168                         }
1169                         
1170                         /* grab modifiers until index i */
1171                         if((index >= 0) && (modifiers_indexInObject(ob, md) >= index))
1172                                 break;
1173                 }
1174
1175                 /* Result of all leading deforming modifiers is cached for
1176                  * places that wish to use the original mesh but with deformed
1177                  * coordinates (vpaint, etc.)
1178                  */
1179                 if (deform_r) {
1180                         *deform_r = CDDM_from_mesh(me, ob);
1181                          
1182                         if (build_shapekey_layers)
1183                                 add_shapekey_layers(dm, me, ob);
1184                         
1185                         if(deformedVerts) {
1186                                 CDDM_apply_vert_coords(*deform_r, deformedVerts);
1187                                 CDDM_calc_normals(*deform_r);
1188                         }
1189                 }
1190         } else {
1191                 /* default behaviour for meshes */
1192                 if(inputVertexCos)
1193                         deformedVerts = inputVertexCos;
1194                 else
1195                         deformedVerts = mesh_getVertexCos(me, &numVerts);
1196         }
1197
1198
1199         /* Now apply all remaining modifiers. If useDeform is off then skip
1200          * OnlyDeform ones. 
1201          */
1202         dm = NULL;
1203         orcodm = NULL;
1204         clothorcodm = NULL;
1205
1206         for(;md; md = md->next, curr = curr->next) {
1207                 ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1208
1209                 md->scene= scene;
1210
1211                 if(!modifier_isEnabled(scene, md, required_mode)) continue;
1212                 if(mti->type == eModifierTypeType_OnlyDeform && !useDeform) continue;
1213                 if((mti->flags & eModifierTypeFlag_RequiresOriginalData) && dm) {
1214                         modifier_setError(md, "Modifier requires original data, bad stack position.");
1215                         continue;
1216                 }
1217                 if(sculpt_mode && (!has_multires || multires_applied)) {
1218                         int unsupported= 0;
1219
1220                         if(scene->toolsettings->sculpt->flags & SCULPT_ONLY_DEFORM)
1221                                 unsupported|= mti->type != eModifierTypeType_OnlyDeform;
1222
1223                         unsupported|= md->type == eModifierType_Multires && ((MultiresModifierData*)md)->sculptlvl==0;
1224                         unsupported|= multires_applied;
1225
1226                         if(unsupported) {
1227                                 modifier_setError(md, "Not supported in sculpt mode.");
1228                                 continue;
1229                         }
1230                 }
1231                 if(needMapping && !modifier_supportsMapping(md)) continue;
1232                 if(useDeform < 0 && mti->dependsOnTime && mti->dependsOnTime(md)) continue;
1233
1234                 /* add an orco layer if needed by this modifier */
1235                 if(mti->requiredDataMask)
1236                         mask = mti->requiredDataMask(ob, md);
1237                 else
1238                         mask = 0;
1239
1240                 if(dm && (mask & CD_MASK_ORCO))
1241                         add_orco_dm(ob, NULL, dm, orcodm, CD_ORCO);
1242
1243                 /* How to apply modifier depends on (a) what we already have as
1244                  * a result of previous modifiers (could be a DerivedMesh or just
1245                  * deformed vertices) and (b) what type the modifier is.
1246                  */
1247
1248                 if(mti->type == eModifierTypeType_OnlyDeform) {
1249                         /* No existing verts to deform, need to build them. */
1250                         if(!deformedVerts) {
1251                                 if(dm) {
1252                                         /* Deforming a derived mesh, read the vertex locations
1253                                          * out of the mesh and deform them. Once done with this
1254                                          * run of deformers verts will be written back.
1255                                          */
1256                                         numVerts = dm->getNumVerts(dm);
1257                                         deformedVerts =
1258                                                 MEM_mallocN(sizeof(*deformedVerts) * numVerts, "dfmv");
1259                                         dm->getVertCos(dm, deformedVerts);
1260                                 } else {
1261                                         deformedVerts = mesh_getVertexCos(me, &numVerts);
1262                                 }
1263                         }
1264
1265                         /* if this is not the last modifier in the stack then recalculate the normals
1266                          * to avoid giving bogus normals to the next modifier see: [#23673] */
1267                         if(dm && isPrevDeform &&  mti->dependsOnNormals && mti->dependsOnNormals(md)) {
1268                                 /* XXX, this covers bug #23673, but we may need normal calc for other types */
1269                                 if(dm && dm->type == DM_TYPE_CDDM) {
1270                                         CDDM_apply_vert_coords(dm, deformedVerts);
1271                                         CDDM_calc_normals(dm);
1272                                 }
1273                         }
1274
1275                         mti->deformVerts(md, ob, dm, deformedVerts, numVerts, useRenderParams, useDeform);
1276                 } else {
1277                         DerivedMesh *ndm;
1278
1279                         /* determine which data layers are needed by following modifiers */
1280                         if(curr->next)
1281                                 nextmask= (CustomDataMask)GET_INT_FROM_POINTER(curr->next->link);
1282                         else
1283                                 nextmask= dataMask;
1284
1285                         /* apply vertex coordinates or build a DerivedMesh as necessary */
1286                         if(dm) {
1287                                 if(deformedVerts) {
1288                                         DerivedMesh *tdm = CDDM_copy(dm, 0);
1289                                         dm->release(dm);
1290                                         dm = tdm;
1291
1292                                         CDDM_apply_vert_coords(dm, deformedVerts);
1293                                         CDDM_calc_normals(dm);
1294                                 }
1295                         } else {
1296                                 dm = CDDM_from_mesh(me, ob);
1297
1298                                 if (build_shapekey_layers)
1299                                         add_shapekey_layers(dm, me, ob);
1300
1301                                 if(deformedVerts) {
1302                                         CDDM_apply_vert_coords(dm, deformedVerts);
1303                                         CDDM_calc_normals(dm);
1304                                 }
1305
1306                                 /* Constructive modifiers need to have an origindex
1307                                  * otherwise they wont have anywhere to copy the data from.
1308                                  *
1309                                  * Also create ORIGINDEX data if any of the following modifiers
1310                                  * requests it, this way Mirror, Solidify etc will keep ORIGINDEX
1311                                  * data by using generic DM_copy_vert_data() functions.
1312                                  */
1313                                 if(needMapping || (nextmask & CD_MASK_ORIGINDEX)) {
1314                                         /* calc */
1315                                         DM_add_vert_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
1316                                         DM_add_edge_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
1317                                         DM_add_poly_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
1318
1319                                         range_vn_i(DM_get_vert_data_layer(dm, CD_ORIGINDEX), dm->numVertData, 0);
1320                                         range_vn_i(DM_get_edge_data_layer(dm, CD_ORIGINDEX), dm->numEdgeData, 0);
1321                                         range_vn_i(DM_get_poly_data_layer(dm, CD_ORIGINDEX), dm->numPolyData, 0);
1322                                 }
1323
1324                                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
1325                                         add_weight_mcol_dm(ob, dm, draw_flag);
1326
1327                         }
1328
1329                         
1330                         /* set the DerivedMesh to only copy needed data */
1331                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link);
1332                         /* needMapping check here fixes bug [#28112], otherwise its
1333                          * possible that it wont be copied */
1334                         mask |= append_mask;
1335                         DM_set_only_copy(dm, mask | (needMapping ? CD_MASK_ORIGINDEX : 0));
1336                         
1337                         /* add cloth rest shape key if need */
1338                         if(mask & CD_MASK_CLOTH_ORCO)
1339                                 add_orco_dm(ob, NULL, dm, clothorcodm, CD_CLOTH_ORCO);
1340
1341                         /* add an origspace layer if needed */
1342                         if(((CustomDataMask)GET_INT_FROM_POINTER(curr->link)) & CD_MASK_ORIGSPACE)
1343                                 if(!CustomData_has_layer(&dm->faceData, CD_ORIGSPACE))
1344                                         DM_add_tessface_layer(dm, CD_ORIGSPACE, CD_DEFAULT, NULL);
1345
1346                         ndm = mti->applyModifier(md, ob, dm, useRenderParams, useCache);
1347
1348                         if(ndm) {
1349                                 /* if the modifier returned a new dm, release the old one */
1350                                 if(dm && dm != ndm) dm->release(dm);
1351
1352                                 dm = ndm;
1353
1354                                 if(deformedVerts) {
1355                                         if(deformedVerts != inputVertexCos)
1356                                                 MEM_freeN(deformedVerts);
1357
1358                                         deformedVerts = NULL;
1359                                 }
1360                         } 
1361
1362                         /* create an orco derivedmesh in parallel */
1363                         if(nextmask & CD_MASK_ORCO) {
1364                                 if(!orcodm)
1365                                         orcodm= create_orco_dm(ob, me, NULL, CD_ORCO);
1366
1367                                 nextmask &= ~CD_MASK_ORCO;
1368                                 DM_set_only_copy(orcodm, nextmask | CD_MASK_ORIGINDEX);
1369                                 ndm = mti->applyModifier(md, ob, orcodm, useRenderParams, 0);
1370
1371                                 if(ndm) {
1372                                         /* if the modifier returned a new dm, release the old one */
1373                                         if(orcodm && orcodm != ndm) orcodm->release(orcodm);
1374                                         orcodm = ndm;
1375                                 }
1376                         }
1377
1378                         /* create cloth orco derivedmesh in parallel */
1379                         if(nextmask & CD_MASK_CLOTH_ORCO) {
1380                                 if(!clothorcodm)
1381                                         clothorcodm= create_orco_dm(ob, me, NULL, CD_CLOTH_ORCO);
1382
1383                                 nextmask &= ~CD_MASK_CLOTH_ORCO;
1384                                 DM_set_only_copy(clothorcodm, nextmask | CD_MASK_ORIGINDEX);
1385                                 ndm = mti->applyModifier(md, ob, clothorcodm, useRenderParams, 0);
1386
1387                                 if(ndm) {
1388                                         /* if the modifier returned a new dm, release the old one */
1389                                         if(clothorcodm && clothorcodm != ndm) clothorcodm->release(clothorcodm);
1390                                         clothorcodm = ndm;
1391                                 }
1392                         }
1393
1394                         /* in case of dynamic paint, make sure preview mask remains for following modifiers */
1395                         if (md->type == eModifierType_DynamicPaint)
1396                                 append_mask |= CD_MASK_WEIGHT_MCOL;
1397                 }
1398
1399                 isPrevDeform= (mti->type == eModifierTypeType_OnlyDeform);
1400
1401                 /* grab modifiers until index i */
1402                 if((index >= 0) && (modifiers_indexInObject(ob, md) >= index))
1403                         break;
1404
1405                 if(sculpt_mode && md->type == eModifierType_Multires)
1406                         multires_applied = 1;
1407         }
1408
1409         for(md=firstmd; md; md=md->next)
1410                 modifier_freeTemporaryData(md);
1411
1412         /* Yay, we are done. If we have a DerivedMesh and deformed vertices
1413          * need to apply these back onto the DerivedMesh. If we have no
1414          * DerivedMesh then we need to build one.
1415          */
1416         if(dm && deformedVerts) {
1417                 finaldm = CDDM_copy(dm, 0);
1418
1419                 dm->release(dm);
1420
1421                 CDDM_apply_vert_coords(finaldm, deformedVerts);
1422
1423                 CDDM_calc_normals(finaldm);
1424
1425                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
1426                         add_weight_mcol_dm(ob, finaldm, draw_flag);
1427
1428         } else if(dm) {
1429                 finaldm = dm;
1430         } else {
1431                 int recalc_normals= 0;
1432
1433                 finaldm = CDDM_from_mesh(me, ob);
1434                 
1435                 if(build_shapekey_layers) {
1436                         add_shapekey_layers(finaldm, me, ob);
1437                         recalc_normals= 1;
1438                 }
1439                 
1440                 if(deformedVerts) {
1441                         CDDM_apply_vert_coords(finaldm, deformedVerts);
1442                         recalc_normals= 1;
1443                 }
1444
1445                 if(recalc_normals)
1446                         CDDM_calc_normals(finaldm);
1447                 
1448                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
1449                         add_weight_mcol_dm(ob, finaldm, draw_flag);
1450         }
1451
1452         /* add an orco layer if needed */
1453         if(dataMask & CD_MASK_ORCO) {
1454                 add_orco_dm(ob, NULL, finaldm, orcodm, CD_ORCO);
1455
1456                 if(deform_r && *deform_r)
1457                         add_orco_dm(ob, NULL, *deform_r, NULL, CD_ORCO);
1458         }
1459
1460 #ifdef WITH_GAMEENGINE
1461         /* NavMesh - this is a hack but saves having a NavMesh modifier */
1462         if ((ob->gameflag & OB_NAVMESH) && (finaldm->type == DM_TYPE_CDDM)) {
1463                 DerivedMesh *tdm;
1464                 tdm= navmesh_dm_createNavMeshForVisualization(finaldm);
1465                 if (finaldm != tdm) {
1466                         finaldm->release(finaldm);
1467                         finaldm= tdm;
1468                 }
1469         }
1470 #endif /* WITH_GAMEENGINE */
1471
1472
1473         /* --------------------------------------------------------------------- */
1474         /* Re-tesselation is necessary to push render data (uvs, textures, colors)
1475          * from loops and polys onto the tessfaces. This may be currently be
1476          * redundantin cases where the render mode doesn't use these inputs, but
1477          * ideally eventually tesselation would happen on-demand, and this is one
1478          * of the primary places it would be needed. */
1479         finaldm->recalcTesselation(finaldm);
1480         /* if we have no modifiers applied we'lll still want the tessface normals
1481          * to be calculated from the polygon noramals,
1482          * 'CDDM_calc_normals' checks for this case - campbell */
1483         finaldm->calcNormals(finaldm);
1484         /* Need to watch this, it can cause issues, see bug [#29338]             */
1485         /* take care with this block, we really need testing frameworks          */
1486         /* --------------------------------------------------------------------- */
1487
1488
1489         *final_r = finaldm;
1490
1491         if(orcodm)
1492                 orcodm->release(orcodm);
1493         if(clothorcodm)
1494                 clothorcodm->release(clothorcodm);
1495
1496         if(deformedVerts && deformedVerts != inputVertexCos)
1497                 MEM_freeN(deformedVerts);
1498
1499         BLI_linklist_free(datamasks, NULL);
1500 }
1501
1502 float (*editbmesh_get_vertex_cos(BMEditMesh *em, int *numVerts_r))[3]
1503 {
1504         int i, numVerts = *numVerts_r = em->bm->totvert;
1505         float (*cos)[3];
1506         BMIter iter;
1507         BMVert *eve;
1508
1509         cos = MEM_mallocN(sizeof(float)*3*numVerts, "vertexcos");
1510
1511         eve = BMIter_New(&iter, em->bm, BM_VERTS_OF_MESH, NULL);
1512         for (i=0; eve; eve=BMIter_Step(&iter), i++) {
1513                 copy_v3_v3(cos[i], eve->co);
1514         }
1515
1516         return cos;
1517 }
1518
1519 int editbmesh_modifier_is_enabled(Scene *scene, ModifierData *md, DerivedMesh *dm)
1520 {
1521         ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1522         int required_mode = eModifierMode_Realtime | eModifierMode_Editmode;
1523
1524         if(!modifier_isEnabled(scene, md, required_mode)) return 0;
1525         if((mti->flags & eModifierTypeFlag_RequiresOriginalData) && dm) {
1526                 modifier_setError(md, "Modifier requires original data, bad stack position.");
1527                 return 0;
1528         }
1529         
1530         return 1;
1531 }
1532
1533 static void editbmesh_calc_modifiers(Scene *scene, Object *ob, BMEditMesh *em, DerivedMesh **cage_r,
1534                                                                         DerivedMesh **final_r,
1535                                                                         CustomDataMask dataMask)
1536 {
1537         ModifierData *md;
1538         float (*deformedVerts)[3] = NULL;
1539         CustomDataMask mask;
1540         DerivedMesh *dm = NULL, *orcodm = NULL, *finaldm = NULL;
1541         int i, numVerts = 0, cageIndex = modifiers_getCageIndex(scene, ob, NULL, 1);
1542         LinkNode *datamasks, *curr;
1543         int required_mode = eModifierMode_Realtime | eModifierMode_Editmode;
1544
1545         modifiers_clearErrors(ob);
1546
1547         if(cage_r && cageIndex == -1) {
1548                 *cage_r = getEditDerivedBMesh(em, ob, NULL);
1549         }
1550
1551         md = modifiers_getVirtualModifierList(ob);
1552
1553         datamasks = modifiers_calcDataMasks(scene, ob, md, dataMask, required_mode);
1554
1555         curr = datamasks;
1556         for(i = 0; md; i++, md = md->next, curr = curr->next) {
1557                 ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1558
1559                 md->scene= scene;
1560                 
1561                 if(!editbmesh_modifier_is_enabled(scene, md, dm))
1562                         continue;
1563
1564                 /* add an orco layer if needed by this modifier */
1565                 if(dm && mti->requiredDataMask) {
1566                         mask = mti->requiredDataMask(ob, md);
1567                         if(mask & CD_MASK_ORCO)
1568                                 add_orco_dm(ob, em, dm, orcodm, CD_ORCO);
1569                 }
1570
1571                 /* How to apply modifier depends on (a) what we already have as
1572                  * a result of previous modifiers (could be a DerivedMesh or just
1573                  * deformed vertices) and (b) what type the modifier is.
1574                  */
1575
1576                 if(mti->type == eModifierTypeType_OnlyDeform) {
1577                         /* No existing verts to deform, need to build them. */
1578                         if(!deformedVerts) {
1579                                 if(dm) {
1580                                         /* Deforming a derived mesh, read the vertex locations
1581                                          * out of the mesh and deform them. Once done with this
1582                                          * run of deformers verts will be written back.
1583                                          */
1584                                         numVerts = dm->getNumVerts(dm);
1585                                         deformedVerts =
1586                                                 MEM_mallocN(sizeof(*deformedVerts) * numVerts, "dfmv");
1587                                         dm->getVertCos(dm, deformedVerts);
1588                                 } else {
1589                                         deformedVerts = editbmesh_get_vertex_cos(em, &numVerts);
1590                                 }
1591                         }
1592
1593                         if (mti->deformVertsEM)
1594                                 mti->deformVertsEM(md, ob, em, dm, deformedVerts, numVerts);
1595                         else mti->deformVerts(md, ob, dm, deformedVerts, numVerts, 0, 0);
1596                 } else {
1597                         DerivedMesh *ndm;
1598
1599                         /* apply vertex coordinates or build a DerivedMesh as necessary */
1600                         if(dm) {
1601                                 if(deformedVerts) {
1602                                         DerivedMesh *tdm = CDDM_copy(dm, 0);
1603                                         if(!(cage_r && dm == *cage_r)) dm->release(dm);
1604                                         dm = tdm;
1605
1606                                         CDDM_apply_vert_coords(dm, deformedVerts);
1607                                         CDDM_calc_normals(dm);
1608                                 } else if(cage_r && dm == *cage_r) {
1609                                         /* dm may be changed by this modifier, so we need to copy it
1610                                          */
1611                                         dm = CDDM_copy(dm, 0);
1612                                 }
1613
1614                         } else {
1615                                 dm = CDDM_from_BMEditMesh(em, ob->data, 0);
1616
1617                                 if(deformedVerts) {
1618                                         CDDM_apply_vert_coords(dm, deformedVerts);
1619                                         CDDM_calc_normals(dm);
1620                                 }
1621                         }
1622
1623                         /* create an orco derivedmesh in parallel */
1624                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link);
1625                         if(mask & CD_MASK_ORCO) {
1626                                 if(!orcodm)
1627                                         orcodm= create_orco_dm(ob, ob->data, em, CD_ORCO);
1628
1629                                 mask &= ~CD_MASK_ORCO;
1630                                 DM_set_only_copy(orcodm, mask | CD_MASK_ORIGINDEX);
1631
1632                                 if (mti->applyModifierEM)
1633                                         ndm = mti->applyModifierEM(md, ob, em, orcodm);
1634                                 else
1635                                         ndm = mti->applyModifier(md, ob, orcodm, 0, 0);
1636
1637                                 if(ndm) {
1638                                         /* if the modifier returned a new dm, release the old one */
1639                                         if(orcodm && orcodm != ndm) orcodm->release(orcodm);
1640                                         orcodm = ndm;
1641                                 }
1642                         }
1643
1644                         /* set the DerivedMesh to only copy needed data */
1645                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link); /* CD_MASK_ORCO may have been cleared above */
1646
1647                         DM_set_only_copy(dm, mask | CD_MASK_ORIGINDEX);
1648
1649                         if(mask & CD_MASK_ORIGSPACE)
1650                                 if(!CustomData_has_layer(&dm->faceData, CD_ORIGSPACE))
1651                                         DM_add_tessface_layer(dm, CD_ORIGSPACE, CD_DEFAULT, NULL);
1652                         
1653                         if (mti->applyModifierEM)
1654                                 ndm = mti->applyModifierEM(md, ob, em, dm);
1655                         else
1656                                 ndm = mti->applyModifier(md, ob, dm, 0, 0);
1657
1658                         if (ndm) {
1659                                 if(dm && dm != ndm)
1660                                         dm->release(dm);
1661
1662                                 dm = ndm;
1663
1664                                 if (deformedVerts) {
1665                                         MEM_freeN(deformedVerts);
1666                                         deformedVerts = NULL;
1667                                 }
1668                         }
1669                 }
1670
1671                 if(cage_r && i == cageIndex) {
1672                         if(dm && deformedVerts) {
1673                                 *cage_r = CDDM_copy(dm, 0);
1674                                 CDDM_apply_vert_coords(*cage_r, deformedVerts);
1675                         } else if(dm) {
1676                                 *cage_r = dm;
1677                         } else {
1678                                 *cage_r =
1679                                         getEditDerivedBMesh(em, ob,
1680                                                 deformedVerts ? MEM_dupallocN(deformedVerts) : NULL);
1681                         }
1682                 }
1683         }
1684
1685         BLI_linklist_free(datamasks, NULL);
1686
1687         /* Yay, we are done. If we have a DerivedMesh and deformed vertices need
1688          * to apply these back onto the DerivedMesh. If we have no DerivedMesh
1689          * then we need to build one.
1690          */
1691         if(dm && deformedVerts) {
1692                 finaldm = CDDM_copy(dm, 0);
1693
1694                 if(!(cage_r && dm == *cage_r)) dm->release(dm);
1695
1696                 CDDM_apply_vert_coords(*final_r, deformedVerts);
1697         } else if (dm) {
1698                 finaldm = dm;
1699         } else if (!deformedVerts && cage_r && *cage_r) {
1700                 finaldm = *cage_r;
1701         } else {
1702                 finaldm = getEditDerivedBMesh(em, ob, deformedVerts);
1703                 deformedVerts = NULL;
1704         }
1705
1706         finaldm->calcNormals(finaldm);
1707
1708         *final_r = finaldm;
1709
1710         /* add an orco layer if needed */
1711         if(dataMask & CD_MASK_ORCO)
1712                 add_orco_dm(ob, em, *final_r, orcodm, CD_ORCO);
1713
1714         if(orcodm)
1715                 orcodm->release(orcodm);
1716
1717         if(deformedVerts)
1718                 MEM_freeN(deformedVerts);
1719 }
1720
1721 static void clear_mesh_caches(Object *ob)
1722 {
1723         Mesh *me= ob->data;
1724
1725                 /* also serves as signal to remake texspace */
1726         if (ob->bb) {
1727                 MEM_freeN(ob->bb);
1728                 ob->bb = NULL;
1729         }
1730         if (me->bb) {
1731                 MEM_freeN(me->bb);
1732                 me->bb = NULL;
1733         }
1734
1735         freedisplist(&ob->disp);
1736
1737         if (ob->derivedFinal) {
1738                 ob->derivedFinal->needsFree = 1;
1739                 ob->derivedFinal->release(ob->derivedFinal);
1740                 ob->derivedFinal= NULL;
1741         }
1742         if (ob->derivedDeform) {
1743                 ob->derivedDeform->needsFree = 1;
1744                 ob->derivedDeform->release(ob->derivedDeform);
1745                 ob->derivedDeform= NULL;
1746         }
1747
1748         if(ob->sculpt) {
1749                 object_sculpt_modifiers_changed(ob);
1750         }
1751 }
1752
1753 static void mesh_build_data(Scene *scene, Object *ob, CustomDataMask dataMask,
1754         int build_shapekey_layers)
1755 {
1756         Object *obact = scene->basact?scene->basact->object:NULL;
1757         int editing = paint_facesel_test(ob);
1758         /* weight paint and face select need original indices because of selection buffer drawing */
1759         int needMapping = (ob==obact) && (editing || (ob->mode & (OB_MODE_WEIGHT_PAINT|OB_MODE_VERTEX_PAINT|OB_MODE_TEXTURE_PAINT)));
1760
1761         clear_mesh_caches(ob);
1762
1763         mesh_calc_modifiers(scene, ob, NULL, &ob->derivedDeform,
1764                                                 &ob->derivedFinal, 0, 1,
1765                                                 needMapping, dataMask, -1, 1, build_shapekey_layers);
1766
1767         DM_set_object_boundbox (ob, ob->derivedFinal);
1768
1769         ob->derivedFinal->needsFree = 0;
1770         ob->derivedDeform->needsFree = 0;
1771         ob->lastDataMask = dataMask;
1772 }
1773
1774 static void editbmesh_build_data(Scene *scene, Object *obedit, BMEditMesh *em, CustomDataMask dataMask)
1775 {
1776         clear_mesh_caches(obedit);
1777
1778         if (em->derivedFinal) {
1779                 if (em->derivedFinal!=em->derivedCage) {
1780                         em->derivedFinal->needsFree = 1;
1781                         em->derivedFinal->release(em->derivedFinal);
1782                 }
1783                 em->derivedFinal = NULL;
1784         }
1785         if (em->derivedCage) {
1786                 em->derivedCage->needsFree = 1;
1787                 em->derivedCage->release(em->derivedCage);
1788                 em->derivedCage = NULL;
1789         }
1790
1791         editbmesh_calc_modifiers(scene, obedit, em, &em->derivedCage, &em->derivedFinal, dataMask);
1792         DM_set_object_boundbox (obedit, em->derivedFinal);
1793
1794         em->lastDataMask = dataMask;
1795         em->derivedFinal->needsFree = 0;
1796         em->derivedCage->needsFree = 0;
1797 }
1798
1799 void makeDerivedMesh(Scene *scene, Object *ob, BMEditMesh *em,
1800         CustomDataMask dataMask, int build_shapekey_layers)
1801 {
1802         if (em) {
1803                 editbmesh_build_data(scene, ob, em, dataMask);
1804         } else {
1805                 mesh_build_data(scene, ob, dataMask, build_shapekey_layers);
1806         }
1807 }
1808
1809 /***/
1810
1811 DerivedMesh *mesh_get_derived_final(Scene *scene, Object *ob, CustomDataMask dataMask)
1812 {
1813         /* if there's no derived mesh or the last data mask used doesn't include
1814          * the data we need, rebuild the derived mesh
1815          */
1816         if(!ob->derivedFinal || (dataMask & ob->lastDataMask) != dataMask)
1817                 mesh_build_data(scene, ob, dataMask, 0);
1818
1819         return ob->derivedFinal;
1820 }
1821
1822 DerivedMesh *mesh_get_derived_deform(Scene *scene, Object *ob, CustomDataMask dataMask)
1823 {
1824         /* if there's no derived mesh or the last data mask used doesn't include
1825          * the data we need, rebuild the derived mesh
1826          */
1827         if(!ob->derivedDeform || (dataMask & ob->lastDataMask) != dataMask)
1828                 mesh_build_data(scene, ob, dataMask, 0);
1829
1830         return ob->derivedDeform;
1831 }
1832
1833 DerivedMesh *mesh_create_derived_render(Scene *scene, Object *ob, CustomDataMask dataMask)
1834 {
1835         DerivedMesh *final;
1836         
1837         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 1, 1, 0, dataMask, -1, 0, 0);
1838
1839         return final;
1840 }
1841
1842 DerivedMesh *mesh_create_derived_index_render(Scene *scene, Object *ob, CustomDataMask dataMask, int index)
1843 {
1844         DerivedMesh *final;
1845         
1846         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 1, 1, 0, dataMask, index, 0, 0);
1847
1848         return final;
1849 }
1850
1851 DerivedMesh *mesh_create_derived_view(Scene *scene, Object *ob, CustomDataMask dataMask)
1852 {
1853         DerivedMesh *final;
1854
1855         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 0, 1, 0, dataMask, -1, 0, 0);
1856
1857         return final;
1858 }
1859
1860 DerivedMesh *mesh_create_derived_no_deform(Scene *scene, Object *ob, float (*vertCos)[3],
1861                                                                                    CustomDataMask dataMask)
1862 {
1863         DerivedMesh *final;
1864         
1865         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, 0, 0, dataMask, -1, 0, 0);
1866
1867         return final;
1868 }
1869
1870 DerivedMesh *mesh_create_derived_no_virtual(Scene *scene, Object *ob, float (*vertCos)[3],
1871                                                                                         CustomDataMask dataMask)
1872 {
1873         DerivedMesh *final;
1874         
1875         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, -1, 0, dataMask, -1, 0, 0);
1876
1877         return final;
1878 }
1879
1880 DerivedMesh *mesh_create_derived_physics(Scene *scene, Object *ob, float (*vertCos)[3],
1881                                                                                         CustomDataMask dataMask)
1882 {
1883         DerivedMesh *final;
1884         
1885         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, -1, 1, dataMask, -1, 0, 0);
1886
1887         return final;
1888 }
1889
1890 DerivedMesh *mesh_create_derived_no_deform_render(Scene *scene, Object *ob,
1891                                                                                                   float (*vertCos)[3],
1892                                                                                                   CustomDataMask dataMask)
1893 {
1894         DerivedMesh *final;
1895
1896         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 1, 0, 0, dataMask, -1, 0, 0);
1897
1898         return final;
1899 }
1900
1901 /***/
1902
1903 DerivedMesh *editbmesh_get_derived_cage_and_final(Scene *scene, Object *obedit, BMEditMesh *em, DerivedMesh **final_r,
1904                                                                                                  CustomDataMask dataMask)
1905 {
1906         /* if there's no derived mesh or the last data mask used doesn't include
1907          * the data we need, rebuild the derived mesh
1908          */
1909         if(!em->derivedCage ||
1910            (em->lastDataMask & dataMask) != dataMask)
1911                 editbmesh_build_data(scene, obedit, em, dataMask);
1912
1913         *final_r = em->derivedFinal;
1914         return em->derivedCage;
1915 }
1916
1917 DerivedMesh *editbmesh_get_derived_cage(Scene *scene, Object *obedit, BMEditMesh *em, CustomDataMask dataMask)
1918 {
1919         /* if there's no derived mesh or the last data mask used doesn't include
1920          * the data we need, rebuild the derived mesh
1921          */
1922         if(!em->derivedCage ||
1923            (em->lastDataMask & dataMask) != dataMask)
1924                 editbmesh_build_data(scene, obedit, em, dataMask);
1925
1926         return em->derivedCage;
1927 }
1928
1929 DerivedMesh *editbmesh_get_derived_base(Object *obedit, BMEditMesh *em)
1930 {
1931         return getEditDerivedBMesh(em, obedit, NULL);
1932 }
1933
1934
1935 /* ********* For those who don't grasp derived stuff! (ton) :) *************** */
1936
1937 static void make_vertexcosnos__mapFunc(void *userData, int index, float *co, float *no_f, short *no_s)
1938 {
1939         float *vec = userData;
1940         
1941         vec+= 6*index;
1942
1943         /* check if we've been here before (normal should not be 0) */
1944         if(vec[3] || vec[4] || vec[5]) return;
1945
1946         copy_v3_v3(vec, co);
1947         vec+= 3;
1948         if(no_f) {
1949                 copy_v3_v3(vec, no_f);
1950         }
1951         else {
1952                 normal_short_to_float_v3(vec, no_s);
1953         }
1954 }
1955
1956 /* always returns original amount me->totvert of vertices and normals, but fully deformed and subsurfered */
1957 /* this is needed for all code using vertexgroups (no subsurf support) */
1958 /* it stores the normals as floats, but they can still be scaled as shorts (32767 = unit) */
1959 /* in use now by vertex/weight paint and particle generating */
1960
1961 float *mesh_get_mapped_verts_nors(Scene *scene, Object *ob)
1962 {
1963         Mesh *me= ob->data;
1964         DerivedMesh *dm;
1965         float *vertexcosnos;
1966         
1967         /* lets prevent crashing... */
1968         if(ob->type!=OB_MESH || me->totvert==0)
1969                 return NULL;
1970         
1971         dm= mesh_get_derived_final(scene, ob, CD_MASK_BAREMESH|CD_MASK_ORIGINDEX);
1972         vertexcosnos= MEM_callocN(6*sizeof(float)*me->totvert, "vertexcosnos map");
1973         
1974         if(dm->foreachMappedVert) {
1975                 dm->foreachMappedVert(dm, make_vertexcosnos__mapFunc, vertexcosnos);
1976         }
1977         else {
1978                 float *fp= vertexcosnos;
1979                 int a;
1980                 
1981                 for(a=0; a< me->totvert; a++, fp+=6) {
1982                         dm->getVertCo(dm, a, fp);
1983                         dm->getVertNo(dm, a, fp+3);
1984                 }
1985         }
1986         
1987         dm->release(dm);
1988         return vertexcosnos;
1989 }
1990
1991 /* ******************* GLSL ******************** */
1992
1993 typedef struct
1994 {
1995         float * precomputedFaceNormals;
1996         MTFace * mtface;        // texture coordinates
1997         MFace * mface;          // indices
1998         MVert * mvert;          // vertices & normals
1999         float (*orco)[3];
2000         float (*tangent)[4];    // destination
2001         int numTessFaces;
2002
2003 } SGLSLMeshToTangent;
2004
2005 // interface
2006 #include "mikktspace.h"
2007
2008 static int GetNumFaces(const SMikkTSpaceContext * pContext)
2009 {
2010         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2011         return pMesh->numTessFaces;
2012 }
2013
2014 static int GetNumVertsOfFace(const SMikkTSpaceContext * pContext, const int face_num)
2015 {
2016         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2017         return pMesh->mface[face_num].v4!=0 ? 4 : 3;
2018 }
2019
2020 static void GetPosition(const SMikkTSpaceContext * pContext, float fPos[], const int face_num, const int vert_index)
2021 {
2022         //assert(vert_index>=0 && vert_index<4);
2023         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2024         const float *co= pMesh->mvert[(&pMesh->mface[face_num].v1)[vert_index]].co;
2025         copy_v3_v3(fPos, co);
2026 }
2027
2028 static void GetTextureCoordinate(const SMikkTSpaceContext * pContext, float fUV[], const int face_num, const int vert_index)
2029 {
2030         //assert(vert_index>=0 && vert_index<4);
2031         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2032
2033         if(pMesh->mtface!=NULL) {
2034                 float * uv = pMesh->mtface[face_num].uv[vert_index];
2035                 fUV[0]=uv[0]; fUV[1]=uv[1];
2036         }
2037         else {
2038                 const float *orco= pMesh->orco[(&pMesh->mface[face_num].v1)[vert_index]];
2039                 map_to_sphere( &fUV[0], &fUV[1], orco[0], orco[1], orco[2]);
2040         }
2041 }
2042
2043 static void GetNormal(const SMikkTSpaceContext * pContext, float fNorm[], const int face_num, const int vert_index)
2044 {
2045         //assert(vert_index>=0 && vert_index<4);
2046         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2047
2048         const int smoothnormal = (pMesh->mface[face_num].flag & ME_SMOOTH);
2049         if(!smoothnormal) {     // flat
2050                 if(pMesh->precomputedFaceNormals) {
2051                         copy_v3_v3(fNorm, &pMesh->precomputedFaceNormals[3*face_num]);
2052                 }
2053                 else {
2054                         MFace *mf= &pMesh->mface[face_num];
2055                         float *p0= pMesh->mvert[mf->v1].co;
2056                         float *p1= pMesh->mvert[mf->v2].co;
2057                         float *p2= pMesh->mvert[mf->v3].co;
2058
2059                         if(mf->v4) {
2060                                 float *p3 = pMesh->mvert[mf->v4].co;
2061                                 normal_quad_v3(fNorm, p0, p1, p2, p3);
2062                         }
2063                         else {
2064                                 normal_tri_v3(fNorm, p0, p1, p2);
2065                         }
2066                 }
2067         }
2068         else {
2069                 const short *no= pMesh->mvert[(&pMesh->mface[face_num].v1)[vert_index]].no;
2070                 normal_short_to_float_v3(fNorm, no);
2071         }
2072 }
2073 static void SetTSpace(const SMikkTSpaceContext * pContext, const float fvTangent[], const float fSign, const int face_num, const int iVert)
2074 {
2075         //assert(vert_index>=0 && vert_index<4);
2076         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
2077         float * pRes = pMesh->tangent[4*face_num+iVert];
2078         copy_v3_v3(pRes, fvTangent);
2079         pRes[3]=fSign;
2080 }
2081
2082
2083 void DM_add_tangent_layer(DerivedMesh *dm)
2084 {
2085         /* mesh vars */
2086         MTFace *mtface, *tf;
2087         MFace *mface, *mf;
2088         MVert *mvert, *v1, *v2, *v3, *v4;
2089         MemArena *arena= NULL;
2090         VertexTangent **vtangents= NULL;
2091         float (*orco)[3]= NULL, (*tangent)[4];
2092         float *uv1, *uv2, *uv3, *uv4, *vtang;
2093         float fno[3], tang[3], uv[4][2];
2094         int i, j, len, mf_vi[4], totvert, totface, iCalcNewMethod;
2095         float *nors;
2096
2097         if(CustomData_get_layer_index(&dm->faceData, CD_TANGENT) != -1)
2098                 return;
2099
2100         nors = dm->getTessFaceDataArray(dm, CD_NORMAL);
2101
2102         /* check we have all the needed layers */
2103         totvert= dm->getNumVerts(dm);
2104         totface= dm->getNumTessFaces(dm);
2105
2106         mvert= dm->getVertArray(dm);
2107         mface= dm->getTessFaceArray(dm);
2108         mtface= dm->getTessFaceDataArray(dm, CD_MTFACE);
2109
2110         if(!mtface) {
2111                 orco= dm->getVertDataArray(dm, CD_ORCO);
2112                 if(!orco)
2113                         return;
2114         }
2115         
2116         /* create tangent layer */
2117         DM_add_tessface_layer(dm, CD_TANGENT, CD_CALLOC, NULL);
2118         tangent= DM_get_tessface_data_layer(dm, CD_TANGENT);
2119         
2120         /* allocate some space */
2121         arena= BLI_memarena_new(BLI_MEMARENA_STD_BUFSIZE, "tangent layer arena");
2122         BLI_memarena_use_calloc(arena);
2123         vtangents= MEM_callocN(sizeof(VertexTangent*)*totvert, "VertexTangent");
2124
2125         // new computation method
2126         iCalcNewMethod = 1;
2127         if(iCalcNewMethod != 0) {
2128                 SGLSLMeshToTangent mesh2tangent= {0};
2129                 SMikkTSpaceContext sContext= {0};
2130                 SMikkTSpaceInterface sInterface= {0};
2131
2132                 mesh2tangent.precomputedFaceNormals = nors;
2133                 mesh2tangent.mtface = mtface;
2134                 mesh2tangent.mface = mface;
2135                 mesh2tangent.mvert = mvert;
2136                 mesh2tangent.orco = orco;
2137                 mesh2tangent.tangent = tangent;
2138                 mesh2tangent.numTessFaces = totface;
2139
2140                 sContext.m_pUserData = &mesh2tangent;
2141                 sContext.m_pInterface = &sInterface;
2142                 sInterface.m_getNumFaces = GetNumFaces;
2143                 sInterface.m_getNumVerticesOfFace = GetNumVertsOfFace;
2144                 sInterface.m_getPosition = GetPosition;
2145                 sInterface.m_getTexCoord = GetTextureCoordinate;
2146                 sInterface.m_getNormal = GetNormal;
2147                 sInterface.m_setTSpaceBasic = SetTSpace;
2148
2149                 // 0 if failed
2150                 iCalcNewMethod = genTangSpaceDefault(&sContext);
2151         }
2152
2153         if(!iCalcNewMethod) {
2154                 /* sum tangents at connected vertices */
2155                 for(i=0, tf=mtface, mf=mface; i < totface; mf++, tf++, i++) {
2156                         v1= &mvert[mf->v1];
2157                         v2= &mvert[mf->v2];
2158                         v3= &mvert[mf->v3];
2159
2160                         if (mf->v4) {
2161                                 v4= &mvert[mf->v4];
2162                                 normal_quad_v3( fno,v4->co, v3->co, v2->co, v1->co);
2163                         }
2164                         else {
2165                                 v4= NULL;
2166                                 normal_tri_v3( fno,v3->co, v2->co, v1->co);
2167                         }
2168                 
2169                         if(mtface) {
2170                                 uv1= tf->uv[0];
2171                                 uv2= tf->uv[1];
2172                                 uv3= tf->uv[2];
2173                                 uv4= tf->uv[3];
2174                         }
2175                         else {
2176                                 uv1= uv[0]; uv2= uv[1]; uv3= uv[2]; uv4= uv[3];
2177                                 map_to_sphere( &uv[0][0], &uv[0][1],orco[mf->v1][0], orco[mf->v1][1], orco[mf->v1][2]);
2178                                 map_to_sphere( &uv[1][0], &uv[1][1],orco[mf->v2][0], orco[mf->v2][1], orco[mf->v2][2]);
2179                                 map_to_sphere( &uv[2][0], &uv[2][1],orco[mf->v3][0], orco[mf->v3][1], orco[mf->v3][2]);
2180                                 if(v4)
2181                                         map_to_sphere( &uv[3][0], &uv[3][1],orco[mf->v4][0], orco[mf->v4][1], orco[mf->v4][2]);
2182                         }
2183                 
2184                         tangent_from_uv(uv1, uv2, uv3, v1->co, v2->co, v3->co, fno, tang);
2185                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v1], tang, uv1);
2186                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v2], tang, uv2);
2187                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v3], tang, uv3);
2188                 
2189                         if(mf->v4) {
2190                                 v4= &mvert[mf->v4];
2191                         
2192                                 tangent_from_uv(uv1, uv3, uv4, v1->co, v3->co, v4->co, fno, tang);
2193                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v1], tang, uv1);
2194                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v3], tang, uv3);
2195                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v4], tang, uv4);
2196                         }
2197                 }
2198         
2199                 /* write tangent to layer */
2200                 for(i=0, tf=mtface, mf=mface; i < totface; mf++, tf++, i++, tangent+=4) {
2201                         len= (mf->v4)? 4 : 3; 
2202
2203                         if(mtface == NULL) {
2204                                 map_to_sphere( &uv[0][0], &uv[0][1],orco[mf->v1][0], orco[mf->v1][1], orco[mf->v1][2]);
2205                                 map_to_sphere( &uv[1][0], &uv[1][1],orco[mf->v2][0], orco[mf->v2][1], orco[mf->v2][2]);
2206                                 map_to_sphere( &uv[2][0], &uv[2][1],orco[mf->v3][0], orco[mf->v3][1], orco[mf->v3][2]);
2207                                 if(len==4)
2208                                         map_to_sphere( &uv[3][0], &uv[3][1],orco[mf->v4][0], orco[mf->v4][1], orco[mf->v4][2]);
2209                         }
2210                 
2211                         mf_vi[0]= mf->v1;
2212                         mf_vi[1]= mf->v2;
2213                         mf_vi[2]= mf->v3;
2214                         mf_vi[3]= mf->v4;
2215                 
2216                         for(j=0; j<len; j++) {
2217                                 vtang= find_vertex_tangent(vtangents[mf_vi[j]], mtface ? tf->uv[j] : uv[j]);
2218                                 normalize_v3_v3(tangent[j], vtang);
2219                                 ((float *) tangent[j])[3]=1.0f;
2220                         }
2221                 }
2222         }
2223         
2224         BLI_memarena_free(arena);
2225         MEM_freeN(vtangents);
2226 }
2227
2228 void DM_calc_auto_bump_scale(DerivedMesh *dm)
2229 {
2230         /* int totvert= dm->getNumVerts(dm); */ /* UNUSED */
2231         int totface= dm->getNumTessFaces(dm);
2232
2233         MVert * mvert = dm->getVertArray(dm);
2234         MFace * mface = dm->getTessFaceArray(dm);
2235         MTFace * mtface = dm->getTessFaceDataArray(dm, CD_MTFACE);
2236
2237         if(mtface)
2238         {
2239                 double dsum = 0.0;
2240                 int nr_accumulated = 0;
2241                 int f;
2242
2243                 for ( f=0; f<totface; f++ )
2244                 {
2245                         {
2246                                 float * verts[4], * tex_coords[4];
2247                                 const int nr_verts = mface[f].v4!=0 ? 4 : 3;
2248                                 int i, is_degenerate;
2249
2250                                 verts[0]=mvert[mface[f].v1].co; verts[1]=mvert[mface[f].v2].co; verts[2]=mvert[mface[f].v3].co;
2251                                 tex_coords[0]=mtface[f].uv[0]; tex_coords[1]=mtface[f].uv[1]; tex_coords[2]=mtface[f].uv[2];
2252                                 if(nr_verts==4)
2253                                 {
2254                                         verts[3]=mvert[mface[f].v4].co;
2255                                         tex_coords[3]=mtface[f].uv[3];
2256                                 }
2257
2258                                 // discard degenerate faces
2259                                 is_degenerate = 0;
2260                                 if(     equals_v3v3(verts[0], verts[1]) || equals_v3v3(verts[0], verts[2]) || equals_v3v3(verts[1], verts[2]) ||
2261                                         equals_v2v2(tex_coords[0], tex_coords[1]) || equals_v2v2(tex_coords[0], tex_coords[2]) || equals_v2v2(tex_coords[1], tex_coords[2]) )
2262                                 {
2263                                         is_degenerate = 1;
2264                                 }
2265
2266                                 // verify last vertex as well if this is a quad
2267                                 if ( is_degenerate==0 && nr_verts==4 )
2268                                 {
2269                                         if(     equals_v3v3(verts[3], verts[0]) || equals_v3v3(verts[3], verts[1]) || equals_v3v3(verts[3], verts[2]) ||
2270                                                 equals_v2v2(tex_coords[3], tex_coords[0]) || equals_v2v2(tex_coords[3], tex_coords[1]) || equals_v2v2(tex_coords[3], tex_coords[2]) )
2271                                         {
2272                                                 is_degenerate = 1;
2273                                         }
2274
2275                                         // verify the winding is consistent
2276                                         if ( is_degenerate==0 )
2277                                         {
2278                                                 float prev_edge[2];
2279                                                 int is_signed = 0;
2280                                                 sub_v2_v2v2(prev_edge, tex_coords[0], tex_coords[3]);
2281
2282                                                 i = 0;
2283                                                 while ( is_degenerate==0 && i<4 )
2284                                                 {
2285                                                         float cur_edge[2], signed_area;
2286                                                         sub_v2_v2v2(cur_edge, tex_coords[(i+1)&0x3], tex_coords[i]);
2287                                                         signed_area = prev_edge[0]*cur_edge[1] - prev_edge[1]*cur_edge[0];
2288                                                         if ( i==0 ) is_signed = signed_area<0.0f ? 1 : 0;
2289                                                         else if((is_signed!=0)!=(signed_area<0.0f)) is_degenerate=1;
2290
2291                                                         if ( is_degenerate==0 )
2292                                                         {
2293                                                                 copy_v2_v2(prev_edge, cur_edge);
2294                                                                 ++i;
2295                                                         }
2296                                                 }
2297                                         }
2298                                 }
2299
2300                                 // proceed if not a degenerate face
2301                                 if ( is_degenerate==0 )
2302                                 {
2303                                         int nr_tris_to_pile=0;
2304                                         // quads split at shortest diagonal
2305                                         int offs = 0;           // initial triangulation is 0,1,2 and 0, 2, 3
2306                                         if ( nr_verts==4 )
2307                                         {
2308                                                 float pos_len_diag0, pos_len_diag1;
2309                                                 float vtmp[3];
2310                                                 sub_v3_v3v3(vtmp, verts[2], verts[0]);
2311                                                 pos_len_diag0 = dot_v3v3(vtmp, vtmp);
2312                                                 sub_v3_v3v3(vtmp, verts[3], verts[1]);
2313                                                 pos_len_diag1 = dot_v3v3(vtmp, vtmp);
2314
2315                                                 if(pos_len_diag1<pos_len_diag0)
2316                                                         offs=1;         // alter split
2317                                                 else if(pos_len_diag0==pos_len_diag1)           // do UV check instead
2318                                                 {
2319                                                         float tex_len_diag0, tex_len_diag1;
2320
2321                                                         sub_v2_v2v2(vtmp, tex_coords[2], tex_coords[0]);
2322                                                         tex_len_diag0 = dot_v2v2(vtmp, vtmp);
2323                                                         sub_v2_v2v2(vtmp, tex_coords[3], tex_coords[1]);
2324                                                         tex_len_diag1 = dot_v2v2(vtmp, vtmp);
2325
2326                                                         if(tex_len_diag1<tex_len_diag0)
2327                                                         {
2328                                                                 offs=1;         // alter split
2329                                                         }
2330                                                 }
2331                                         }
2332                                         nr_tris_to_pile = nr_verts-2 ;
2333                                         if ( nr_tris_to_pile==1 || nr_tris_to_pile==2 )
2334                                         {
2335                                                 const int indices[] = {offs+0, offs+1, offs+2, offs+0, offs+2, (offs+3)&0x3 };
2336                                                 int t;
2337                                                 for ( t=0; t<nr_tris_to_pile; t++ )
2338                                                 {
2339                                                         float f2x_area_uv;
2340                                                         float * p0 = verts[indices[t*3+0]];
2341                                                         float * p1 = verts[indices[t*3+1]];
2342                                                         float * p2 = verts[indices[t*3+2]];
2343
2344                                                         float edge_t0[2], edge_t1[2];
2345                                                         sub_v2_v2v2(edge_t0, tex_coords[indices[t*3+1]], tex_coords[indices[t*3+0]]);
2346                                                         sub_v2_v2v2(edge_t1, tex_coords[indices[t*3+2]], tex_coords[indices[t*3+0]]);
2347
2348                                                         f2x_area_uv = fabsf(edge_t0[0]*edge_t1[1] - edge_t0[1]*edge_t1[0]);
2349                                                         if ( f2x_area_uv>FLT_EPSILON )
2350                                                         {
2351                                                                 float norm[3], v0[3], v1[3], f2x_surf_area, fsurf_ratio;
2352                                                                 sub_v3_v3v3(v0, p1, p0);
2353                                                                 sub_v3_v3v3(v1, p2, p0);
2354                                                                 cross_v3_v3v3(norm, v0, v1);
2355
2356                                                                 f2x_surf_area = len_v3(norm);
2357                                                                 fsurf_ratio = f2x_surf_area/f2x_area_uv;        // tri area divided by texture area
2358
2359                                                                 ++nr_accumulated;
2360                                                                 dsum += (double)(fsurf_ratio);
2361                                                         }
2362                                                 }
2363                                         }
2364                                 }
2365                         }
2366                 }
2367
2368                 // finalize
2369                 {
2370                         const float avg_area_ratio = (nr_accumulated>0) ? ((float)(dsum / nr_accumulated)) : 1.0f;
2371                         const float use_as_render_bump_scale = sqrtf(avg_area_ratio);           // use width of average surface ratio as your bump scale
2372                         dm->auto_bump_scale = use_as_render_bump_scale;
2373                 }
2374         }
2375         else
2376         {
2377                 dm->auto_bump_scale = 1.0f;
2378         }
2379 }
2380
2381 void DM_vertex_attributes_from_gpu(DerivedMesh *dm, GPUVertexAttribs *gattribs, DMVertexAttribs *attribs)
2382 {
2383         CustomData *vdata, *fdata, *tfdata = NULL;
2384         int a, b, layer;
2385
2386         /* From the layers requested by the GLSL shader, figure out which ones are
2387          * actually available for this derivedmesh, and retrieve the pointers */
2388
2389         memset(attribs, 0, sizeof(DMVertexAttribs));
2390
2391         vdata = &dm->vertData;
2392         fdata = tfdata = dm->getTessFaceDataLayout(dm);
2393         
2394         /* calc auto bump scale if necessary */
2395 #if 0
2396         if(dm->auto_bump_scale<=0.0f)
2397                 DM_calc_auto_bump_scale(dm);
2398 #else
2399         dm->auto_bump_scale = 1.0f; // will revert this after release
2400 #endif
2401
2402
2403         /* add a tangent layer if necessary */
2404         for(b = 0; b < gattribs->totlayer; b++)
2405                 if(gattribs->layer[b].type == CD_TANGENT)
2406                         if(CustomData_get_layer_index(fdata, CD_TANGENT) == -1)
2407                                 DM_add_tangent_layer(dm);
2408
2409         for(b = 0; b < gattribs->totlayer; b++) {
2410                 if(gattribs->layer[b].type == CD_MTFACE) {
2411                         /* uv coordinates */
2412                         if(gattribs->layer[b].name[0])
2413                                 layer = CustomData_get_named_layer_index(tfdata, CD_MTFACE,
2414                                         gattribs->layer[b].name);
2415                         else
2416                                 layer = CustomData_get_active_layer_index(tfdata, CD_MTFACE);
2417
2418                         if(layer != -1) {
2419                                 a = attribs->tottface++;
2420
2421                                 attribs->tface[a].array = tfdata->layers[layer].data;
2422                                 attribs->tface[a].emOffset = tfdata->layers[layer].offset;
2423                                 attribs->tface[a].glIndex = gattribs->layer[b].glindex;
2424                                 /* attribs->tface[a].glTexco = gattribs->layer[b].gltexco; */ /* BMESH_TODO, trunk has this but not bmesh, need to investigate whats going on here - campbell */
2425                         }
2426                         /* BMESH ONLY, may need to get this working?, otherwise remove */
2427                         /* else {
2428                                 int player;
2429                                 CustomData *pdata = dm->getPolyDataLayout(dm);
2430                                 
2431                                 if(gattribs->layer[b].name[0])
2432                                         player = CustomData_get_named_layer_index(pdata, CD_MTEXPOLY,
2433                                                 gattribs->layer[b].name);
2434                                 else
2435                                         player = CustomData_get_active_layer_index(pdata, CD_MTEXPOLY);
2436                                 
2437                                 if (player != -1) {
2438                                         a = attribs->tottface++;
2439         
2440                                         attribs->tface[a].array = NULL;
2441                                         attribs->tface[a].emOffset = pdata->layers[layer].offset;
2442                                         attribs->tface[a].glIndex = gattribs->layer[b].glindex;
2443                                         attribs->tface[a].glTexco = gattribs->layer[b].gltexco;
2444                                         
2445                                 }
2446                         }
2447                         */
2448                 }
2449                 else if(gattribs->layer[b].type == CD_MCOL) {
2450                         /* vertex colors */
2451                         if(gattribs->layer[b].name[0])
2452                                 layer = CustomData_get_named_layer_index(tfdata, CD_MCOL,
2453                                         gattribs->layer[b].name);
2454                         else
2455                                 layer = CustomData_get_active_layer_index(tfdata, CD_MCOL);
2456
2457                         if(layer != -1) {
2458                                 a = attribs->totmcol++;
2459
2460                                 attribs->mcol[a].array = tfdata->layers[layer].data;
2461                                 attribs->mcol[a].emOffset = tfdata->layers[layer].offset;
2462                                 attribs->mcol[a].glIndex = gattribs->layer[b].glindex;
2463                         }
2464                 }
2465                 else if(gattribs->layer[b].type == CD_TANGENT) {
2466                         /* tangents */
2467                         layer = CustomData_get_layer_index(fdata, CD_TANGENT);
2468
2469                         if(layer != -1) {
2470                                 attribs->tottang = 1;
2471
2472                                 attribs->tang.array = fdata->layers[layer].data;
2473                                 attribs->tang.emOffset = fdata->layers[layer].offset;
2474                                 attribs->tang.glIndex = gattribs->layer[b].glindex;
2475                         }
2476                 }
2477                 else if(gattribs->layer[b].type == CD_ORCO) {
2478                         /* original coordinates */
2479                         layer = CustomData_get_layer_index(vdata, CD_ORCO);
2480
2481                         if(layer != -1) {
2482                                 attribs->totorco = 1;
2483
2484                                 attribs->orco.array = vdata->layers[layer].data;
2485                                 attribs->orco.emOffset = vdata->layers[layer].offset;
2486                                 attribs->orco.glIndex = gattribs->layer[b].glindex;
2487                                 attribs->orco.glTexco = gattribs->layer[b].gltexco;
2488                         }
2489                 }
2490         }
2491 }
2492
2493 /* Set object's bounding box based on DerivedMesh min/max data */
2494 void DM_set_object_boundbox(Object *ob, DerivedMesh *dm)
2495 {
2496         float min[3], max[3];
2497
2498         INIT_MINMAX(min, max);
2499
2500         dm->getMinMax(dm, min, max);
2501
2502         if(!ob->bb)
2503                 ob->bb= MEM_callocN(sizeof(BoundBox), "DM-BoundBox");
2504
2505         boundbox_set_from_min_max(ob->bb, min, max);
2506 }
2507
2508 /* --- NAVMESH (begin) --- */
2509 #ifdef WITH_GAMEENGINE
2510
2511 BM_INLINE int navmesh_bit(int a, int b)
2512 {
2513         return (a & (1 << b)) >> b;
2514 }
2515
2516 BM_INLINE void navmesh_intToCol(int i, float col[3])
2517 {
2518         int     r = navmesh_bit(i, 0) + navmesh_bit(i, 3) * 2 + 1;
2519         int     g = navmesh_bit(i, 1) + navmesh_bit(i, 4) * 2 + 1;
2520         int     b = navmesh_bit(i, 2) + navmesh_bit(i, 5) * 2 + 1;
2521         col[0] = 1 - r*63.0f/255.0f;
2522         col[1] = 1 - g*63.0f/255.0f;
2523         col[2] = 1 - b*63.0f/255.0f;
2524 }
2525
2526 static void navmesh_drawColored(DerivedMesh *dm)
2527 {
2528         int a, glmode;
2529         MVert *mvert = (MVert *)CustomData_get_layer(&dm->vertData, CD_MVERT);
2530         MFace *mface = (MFace *)CustomData_get_layer(&dm->faceData, CD_MFACE);
2531         int *polygonIdx = (int *)CustomData_get_layer(&dm->faceData, CD_RECAST);
2532         float col[3];
2533
2534         if (!polygonIdx)
2535                 return;
2536
2537         /*
2538         //UI_ThemeColor(TH_WIRE);
2539         glDisable(GL_LIGHTING);
2540         glLineWidth(2.0);
2541         dm->drawEdges(dm, 0, 1);
2542         glLineWidth(1.0);
2543         glEnable(GL_LIGHTING);*/
2544
2545         glDisable(GL_LIGHTING);
2546         /*  if(GPU_buffer_legacy(dm) ) */ { /* TODO - VBO draw code, not high priority - campbell */
2547                 DEBUG_VBO( "Using legacy code. drawNavMeshColored\n" );
2548                 //glShadeModel(GL_SMOOTH);
2549                 glBegin(glmode = GL_QUADS);
2550                 for(a = 0; a < dm->numTessFaceData; a++, mface++) {
2551                         int new_glmode = mface->v4?GL_QUADS:GL_TRIANGLES;
2552                         int pi = polygonIdx[a];
2553                         if (pi <= 0) {
2554                                 zero_v3(col);
2555                         }
2556                         else {
2557                                 navmesh_intToCol(pi, col);
2558                         }
2559
2560                         if(new_glmode != glmode) {
2561                                 glEnd();
2562                                 glBegin(glmode = new_glmode);
2563                         }
2564                         glColor3fv(col);
2565                         glVertex3fv(mvert[mface->v1].co);
2566                         glVertex3fv(mvert[mface->v2].co);
2567                         glVertex3fv(mvert[mface->v3].co);
2568                         if(mface->v4) {
2569                                 glVertex3fv(mvert[mface->v4].co);
2570                         }
2571                 }
2572                 glEnd();
2573         }
2574         glEnable(GL_LIGHTING);
2575 }
2576
2577 static void navmesh_DM_drawFacesTex(DerivedMesh *dm,
2578                         int (*setDrawOptions)(MTFace *tface, int has_mcol, int matnr),
2579                         int (*compareDrawOptions)(void *userData, int cur_index, int next_index),
2580                         void *userData)
2581 {
2582         (void) setDrawOptions;
2583         (void) compareDrawOptions;
2584         (void) userData;
2585
2586         navmesh_drawColored(dm);
2587 }
2588
2589 static void navmesh_DM_drawFacesSolid(DerivedMesh *dm,
2590                                       float (*partial_redraw_planes)[4],
2591                                       int UNUSED(fast), int (*setMaterial)(int, void *attribs))
2592 {
2593         (void) partial_redraw_planes;
2594         (void) setMaterial;
2595
2596         //drawFacesSolid_original(dm, partial_redraw_planes, fast, setMaterial);
2597         navmesh_drawColored(dm);
2598 }
2599
2600 static DerivedMesh *navmesh_dm_createNavMeshForVisualization(DerivedMesh *dm)
2601 {
2602         DerivedMesh *result;
2603         int maxFaces = dm->getNumPolys(dm);
2604         int *recastData;
2605         int vertsPerPoly=0, nverts=0, ndtris=0, npolys=0;
2606         float* verts=NULL;
2607         unsigned short *dtris=NULL, *dmeshes=NULL, *polys=NULL;
2608         int *dtrisToPolysMap=NULL, *dtrisToTrisMap=NULL, *trisToFacesMap=NULL;
2609         int res;
2610
2611         result = CDDM_copy(dm, 0);
2612         if (!CustomData_has_layer(&result->faceData, CD_RECAST)) {
2613                 int *sourceRecastData = (int*)CustomData_get_layer(&dm->faceData, CD_RECAST);
2614                 if (sourceRecastData) {
2615                         CustomData_add_layer_named(&result->faceData, CD_RECAST, CD_DUPLICATE,
2616                                                    sourceRecastData, maxFaces, "recastData");
2617                 }
2618         }
2619         recastData = (int*)CustomData_get_layer(&result->faceData, CD_RECAST);
2620
2621         /* note: This is not good design! - really should not be doing this */
2622         result->drawFacesTex =  navmesh_DM_drawFacesTex;
2623         result->drawFacesSolid = navmesh_DM_drawFacesSolid;
2624
2625
2626         /* process mesh */
2627         res  = buildNavMeshDataByDerivedMesh(dm, &vertsPerPoly, &nverts, &verts, &ndtris, &dtris,
2628                                              &npolys, &dmeshes, &polys, &dtrisToPolysMap, &dtrisToTrisMap,
2629                                              &trisToFacesMap);
2630         if (res) {
2631                 size_t polyIdx;
2632
2633                 /* invalidate concave polygon */
2634                 for (polyIdx=0; polyIdx<(size_t)npolys; polyIdx++) {
2635                         unsigned short* poly = &polys[polyIdx*2*vertsPerPoly];
2636                         if (!polyIsConvex(poly, vertsPerPoly, verts)) {
2637                                 /* set negative polygon idx to all faces */
2638                                 unsigned short *dmesh = &dmeshes[4*polyIdx];
2639                                 unsigned short tbase = dmesh[2];
2640                                 unsigned short tnum = dmesh[3];
2641                                 unsigned short ti;
2642
2643                                 for (ti=0; ti<tnum; ti++) {
2644                                         unsigned short triidx = dtrisToTrisMap[tbase+ti];
2645                                         unsigned short faceidx = trisToFacesMap[triidx];
2646                                         if (recastData[faceidx] > 0) {
2647                                                 recastData[faceidx] = -recastData[faceidx];
2648                                         }
2649                                 }
2650                         }
2651                 }
2652         }
2653         else {
2654                 printf("Error during creation polygon infos\n");
2655         }
2656
2657         /* clean up */
2658         if (verts!=NULL)
2659                 MEM_freeN(verts);
2660         if (dtris!=NULL)
2661                 MEM_freeN(dtris);
2662         if (dmeshes!=NULL)
2663                 MEM_freeN(dmeshes);
2664         if (polys!=NULL)
2665                 MEM_freeN(polys);
2666         if (dtrisToPolysMap!=NULL)
2667                 MEM_freeN(dtrisToPolysMap);
2668         if (dtrisToTrisMap!=NULL)
2669                 MEM_freeN(dtrisToTrisMap);
2670         if (trisToFacesMap!=NULL)
2671                 MEM_freeN(trisToFacesMap);
2672
2673         return result;
2674 }
2675
2676 #endif /* WITH_GAMEENGINE */
2677
2678 /* --- NAVMESH (end) --- */