Merging r42533 through r42601 from trunk into soc-2011-tomato
[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
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_pbvh.h"
50 #include "BLI_utildefines.h"
51 #include "BLI_linklist.h"
52
53 #include "BKE_cdderivedmesh.h"
54 #include "BKE_displist.h"
55 #include "BKE_key.h"
56 #include "BKE_modifier.h"
57 #include "BKE_mesh.h"
58 #include "BKE_object.h"
59 #include "BKE_paint.h"
60 #include "BKE_texture.h"
61 #include "BKE_multires.h"
62 #include "BKE_armature.h"
63 #include "BKE_deform.h"
64
65 #ifdef WITH_GAMEENGINE
66 #include "BKE_navmesh_conversion.h"
67 static DerivedMesh *navmesh_dm_createNavMeshForVisualization(DerivedMesh *dm);
68 #endif
69
70 #include "BLO_sys_types.h" // for intptr_t support
71
72 #include "GL/glew.h"
73
74 #include "GPU_buffers.h"
75 #include "GPU_draw.h"
76 #include "GPU_extensions.h"
77 #include "GPU_material.h"
78
79 extern GLubyte stipple_quarttone[128]; /* glutil.c, bad level data */
80
81 ///////////////////////////////////
82 ///////////////////////////////////
83
84 static MVert *dm_getVertArray(DerivedMesh *dm)
85 {
86         MVert *mvert = CustomData_get_layer(&dm->vertData, CD_MVERT);
87
88         if (!mvert) {
89                 mvert = CustomData_add_layer(&dm->vertData, CD_MVERT, CD_CALLOC, NULL,
90                         dm->getNumVerts(dm));
91                 CustomData_set_layer_flag(&dm->vertData, CD_MVERT, CD_FLAG_TEMPORARY);
92                 dm->copyVertArray(dm, mvert);
93         }
94
95         return mvert;
96 }
97
98 static MEdge *dm_getEdgeArray(DerivedMesh *dm)
99 {
100         MEdge *medge = CustomData_get_layer(&dm->edgeData, CD_MEDGE);
101
102         if (!medge) {
103                 medge = CustomData_add_layer(&dm->edgeData, CD_MEDGE, CD_CALLOC, NULL,
104                         dm->getNumEdges(dm));
105                 CustomData_set_layer_flag(&dm->edgeData, CD_MEDGE, CD_FLAG_TEMPORARY);
106                 dm->copyEdgeArray(dm, medge);
107         }
108
109         return medge;
110 }
111
112 static MFace *dm_getFaceArray(DerivedMesh *dm)
113 {
114         MFace *mface = CustomData_get_layer(&dm->faceData, CD_MFACE);
115
116         if (!mface) {
117                 mface = CustomData_add_layer(&dm->faceData, CD_MFACE, CD_CALLOC, NULL,
118                         dm->getNumFaces(dm));
119                 CustomData_set_layer_flag(&dm->faceData, CD_MFACE, CD_FLAG_TEMPORARY);
120                 dm->copyFaceArray(dm, mface);
121         }
122
123         return mface;
124 }
125
126 static MVert *dm_dupVertArray(DerivedMesh *dm)
127 {
128         MVert *tmp = MEM_callocN(sizeof(*tmp) * dm->getNumVerts(dm),
129                                                          "dm_dupVertArray tmp");
130
131         if(tmp) dm->copyVertArray(dm, tmp);
132
133         return tmp;
134 }
135
136 static MEdge *dm_dupEdgeArray(DerivedMesh *dm)
137 {
138         MEdge *tmp = MEM_callocN(sizeof(*tmp) * dm->getNumEdges(dm),
139                                                          "dm_dupEdgeArray tmp");
140
141         if(tmp) dm->copyEdgeArray(dm, tmp);
142
143         return tmp;
144 }
145
146 static MFace *dm_dupFaceArray(DerivedMesh *dm)
147 {
148         MFace *tmp = MEM_callocN(sizeof(*tmp) * dm->getNumFaces(dm),
149                                                          "dm_dupFaceArray tmp");
150
151         if(tmp) dm->copyFaceArray(dm, tmp);
152
153         return tmp;
154 }
155
156 void DM_init_funcs(DerivedMesh *dm)
157 {
158         /* default function implementations */
159         dm->getVertArray = dm_getVertArray;
160         dm->getEdgeArray = dm_getEdgeArray;
161         dm->getFaceArray = dm_getFaceArray;
162         dm->dupVertArray = dm_dupVertArray;
163         dm->dupEdgeArray = dm_dupEdgeArray;
164         dm->dupFaceArray = dm_dupFaceArray;
165
166         dm->getVertData = DM_get_vert_data;
167         dm->getEdgeData = DM_get_edge_data;
168         dm->getFaceData = DM_get_face_data;
169         dm->getVertDataArray = DM_get_vert_data_layer;
170         dm->getEdgeDataArray = DM_get_edge_data_layer;
171         dm->getFaceDataArray = DM_get_face_data_layer;
172
173         bvhcache_init(&dm->bvhCache);
174 }
175
176 void DM_init(DerivedMesh *dm, DerivedMeshType type,
177                          int numVerts, int numEdges, int numFaces)
178 {
179         dm->type = type;
180         dm->numVertData = numVerts;
181         dm->numEdgeData = numEdges;
182         dm->numFaceData = numFaces;
183
184         DM_init_funcs(dm);
185         
186         dm->needsFree = 1;
187         dm->auto_bump_scale = -1.0f;
188 }
189
190 void DM_from_template(DerivedMesh *dm, DerivedMesh *source, DerivedMeshType type,
191                                           int numVerts, int numEdges, int numFaces)
192 {
193         CustomData_copy(&source->vertData, &dm->vertData, CD_MASK_DERIVEDMESH,
194                                         CD_CALLOC, numVerts);
195         CustomData_copy(&source->edgeData, &dm->edgeData, CD_MASK_DERIVEDMESH,
196                                         CD_CALLOC, numEdges);
197         CustomData_copy(&source->faceData, &dm->faceData, CD_MASK_DERIVEDMESH,
198                                         CD_CALLOC, numFaces);
199
200         dm->type = type;
201         dm->numVertData = numVerts;
202         dm->numEdgeData = numEdges;
203         dm->numFaceData = numFaces;
204
205         DM_init_funcs(dm);
206
207         dm->needsFree = 1;
208 }
209
210 int DM_release(DerivedMesh *dm)
211 {
212         if (dm->needsFree) {
213                 bvhcache_free(&dm->bvhCache);
214                 GPU_drawobject_free( dm );
215                 CustomData_free(&dm->vertData, dm->numVertData);
216                 CustomData_free(&dm->edgeData, dm->numEdgeData);
217                 CustomData_free(&dm->faceData, dm->numFaceData);
218
219                 return 1;
220         }
221         else {
222                 CustomData_free_temporary(&dm->vertData, dm->numVertData);
223                 CustomData_free_temporary(&dm->edgeData, dm->numEdgeData);
224                 CustomData_free_temporary(&dm->faceData, dm->numFaceData);
225
226                 return 0;
227         }
228 }
229
230 void DM_to_mesh(DerivedMesh *dm, Mesh *me)
231 {
232         /* dm might depend on me, so we need to do everything with a local copy */
233         Mesh tmp = *me;
234         int totvert, totedge, totface;
235
236         memset(&tmp.vdata, 0, sizeof(tmp.vdata));
237         memset(&tmp.edata, 0, sizeof(tmp.edata));
238         memset(&tmp.fdata, 0, sizeof(tmp.fdata));
239
240         totvert = tmp.totvert = dm->getNumVerts(dm);
241         totedge = tmp.totedge = dm->getNumEdges(dm);
242         totface = tmp.totface = dm->getNumFaces(dm);
243
244         CustomData_copy(&dm->vertData, &tmp.vdata, CD_MASK_MESH, CD_DUPLICATE, totvert);
245         CustomData_copy(&dm->edgeData, &tmp.edata, CD_MASK_MESH, CD_DUPLICATE, totedge);
246         CustomData_copy(&dm->faceData, &tmp.fdata, CD_MASK_MESH, CD_DUPLICATE, totface);
247
248         /* not all DerivedMeshes store their verts/edges/faces in CustomData, so
249            we set them here in case they are missing */
250         if(!CustomData_has_layer(&tmp.vdata, CD_MVERT))
251                 CustomData_add_layer(&tmp.vdata, CD_MVERT, CD_ASSIGN, dm->dupVertArray(dm), totvert);
252         if(!CustomData_has_layer(&tmp.edata, CD_MEDGE))
253                 CustomData_add_layer(&tmp.edata, CD_MEDGE, CD_ASSIGN, dm->dupEdgeArray(dm), totedge);
254         if(!CustomData_has_layer(&tmp.fdata, CD_MFACE))
255                 CustomData_add_layer(&tmp.fdata, CD_MFACE, CD_ASSIGN, dm->dupFaceArray(dm), totface);
256
257         /* object had got displacement layer, should copy this layer to save sculpted data */
258         /* NOTE: maybe some other layers should be copied? nazgul */
259         if(CustomData_has_layer(&me->fdata, CD_MDISPS)) {
260                 if (totface == me->totface) {
261                         MDisps *mdisps = CustomData_get_layer(&me->fdata, CD_MDISPS);
262                         CustomData_add_layer(&tmp.fdata, CD_MDISPS, CD_DUPLICATE, mdisps, totface);
263                 }
264         }
265
266         mesh_update_customdata_pointers(&tmp);
267
268         CustomData_free(&me->vdata, me->totvert);
269         CustomData_free(&me->edata, me->totedge);
270         CustomData_free(&me->fdata, me->totface);
271
272         /* if the number of verts has changed, remove invalid data */
273         if(tmp.totvert != me->totvert) {
274                 if(tmp.key) tmp.key->id.us--;
275                 tmp.key = NULL;
276         }
277
278         *me = tmp;
279 }
280
281 void DM_to_meshkey(DerivedMesh *dm, Mesh *me, KeyBlock *kb)
282 {
283         int a, totvert = dm->getNumVerts(dm);
284         float *fp;
285         MVert *mvert;
286         
287         if(totvert==0 || me->totvert==0 || me->totvert!=totvert) return;
288         
289         if(kb->data) MEM_freeN(kb->data);
290         kb->data= MEM_callocN(me->key->elemsize*me->totvert, "kb->data");
291         kb->totelem= totvert;
292         
293         fp= kb->data;
294         mvert=dm->getVertDataArray(dm, CD_MVERT);
295         
296         for(a=0; a<kb->totelem; a++, fp+=3, mvert++) {
297                 copy_v3_v3(fp, mvert->co);
298         }
299 }
300
301 void DM_set_only_copy(DerivedMesh *dm, CustomDataMask mask)
302 {
303         CustomData_set_only_copy(&dm->vertData, mask);
304         CustomData_set_only_copy(&dm->edgeData, mask);
305         CustomData_set_only_copy(&dm->faceData, mask);
306 }
307
308 void DM_add_vert_layer(DerivedMesh *dm, int type, int alloctype, void *layer)
309 {
310         CustomData_add_layer(&dm->vertData, type, alloctype, layer, dm->numVertData);
311 }
312
313 void DM_add_edge_layer(DerivedMesh *dm, int type, int alloctype, void *layer)
314 {
315         CustomData_add_layer(&dm->edgeData, type, alloctype, layer, dm->numEdgeData);
316 }
317
318 void DM_add_face_layer(DerivedMesh *dm, int type, int alloctype, void *layer)
319 {
320         CustomData_add_layer(&dm->faceData, type, alloctype, layer, dm->numFaceData);
321 }
322
323 void *DM_get_vert_data(DerivedMesh *dm, int index, int type)
324 {
325         return CustomData_get(&dm->vertData, index, type);
326 }
327
328 void *DM_get_edge_data(DerivedMesh *dm, int index, int type)
329 {
330         return CustomData_get(&dm->edgeData, index, type);
331 }
332
333 void *DM_get_face_data(DerivedMesh *dm, int index, int type)
334 {
335         return CustomData_get(&dm->faceData, index, type);
336 }
337
338 void *DM_get_vert_data_layer(DerivedMesh *dm, int type)
339 {
340         if(type == CD_MVERT)
341                 return dm->getVertArray(dm);
342
343         return CustomData_get_layer(&dm->vertData, type);
344 }
345
346 void *DM_get_edge_data_layer(DerivedMesh *dm, int type)
347 {
348         if(type == CD_MEDGE)
349                 return dm->getEdgeArray(dm);
350
351         return CustomData_get_layer(&dm->edgeData, type);
352 }
353
354 void *DM_get_face_data_layer(DerivedMesh *dm, int type)
355 {
356         if(type == CD_MFACE)
357                 return dm->getFaceArray(dm);
358
359         return CustomData_get_layer(&dm->faceData, type);
360 }
361
362 void DM_set_vert_data(DerivedMesh *dm, int index, int type, void *data)
363 {
364         CustomData_set(&dm->vertData, index, type, data);
365 }
366
367 void DM_set_edge_data(DerivedMesh *dm, int index, int type, void *data)
368 {
369         CustomData_set(&dm->edgeData, index, type, data);
370 }
371
372 void DM_set_face_data(DerivedMesh *dm, int index, int type, void *data)
373 {
374         CustomData_set(&dm->faceData, index, type, data);
375 }
376
377 void DM_copy_vert_data(DerivedMesh *source, DerivedMesh *dest,
378                                            int source_index, int dest_index, int count)
379 {
380         CustomData_copy_data(&source->vertData, &dest->vertData,
381                                                  source_index, dest_index, count);
382 }
383
384 void DM_copy_edge_data(DerivedMesh *source, DerivedMesh *dest,
385                                            int source_index, int dest_index, int count)
386 {
387         CustomData_copy_data(&source->edgeData, &dest->edgeData,
388                                                  source_index, dest_index, count);
389 }
390
391 void DM_copy_face_data(DerivedMesh *source, DerivedMesh *dest,
392                                            int source_index, int dest_index, int count)
393 {
394         CustomData_copy_data(&source->faceData, &dest->faceData,
395                                                  source_index, dest_index, count);
396 }
397
398 void DM_free_vert_data(struct DerivedMesh *dm, int index, int count)
399 {
400         CustomData_free_elem(&dm->vertData, index, count);
401 }
402
403 void DM_free_edge_data(struct DerivedMesh *dm, int index, int count)
404 {
405         CustomData_free_elem(&dm->edgeData, index, count);
406 }
407
408 void DM_free_face_data(struct DerivedMesh *dm, int index, int count)
409 {
410         CustomData_free_elem(&dm->faceData, index, count);
411 }
412
413 void DM_interp_vert_data(DerivedMesh *source, DerivedMesh *dest,
414                                                  int *src_indices, float *weights,
415                                                  int count, int dest_index)
416 {
417         CustomData_interp(&source->vertData, &dest->vertData, src_indices,
418                                           weights, NULL, count, dest_index);
419 }
420
421 void DM_interp_edge_data(DerivedMesh *source, DerivedMesh *dest,
422                                                  int *src_indices,
423                                                  float *weights, EdgeVertWeight *vert_weights,
424                                                  int count, int dest_index)
425 {
426         CustomData_interp(&source->edgeData, &dest->edgeData, src_indices,
427                                           weights, (float*)vert_weights, count, dest_index);
428 }
429
430 void DM_interp_face_data(DerivedMesh *source, DerivedMesh *dest,
431                                                  int *src_indices,
432                                                  float *weights, FaceVertWeight *vert_weights,
433                                                  int count, int dest_index)
434 {
435         CustomData_interp(&source->faceData, &dest->faceData, src_indices,
436                                           weights, (float*)vert_weights, count, dest_index);
437 }
438
439 void DM_swap_face_data(DerivedMesh *dm, int index, const int *corner_indices)
440 {
441         CustomData_swap(&dm->faceData, index, corner_indices);
442 }
443
444 ///
445
446 DerivedMesh *mesh_create_derived(Mesh *me, Object *ob, float (*vertCos)[3])
447 {
448         DerivedMesh *dm = CDDM_from_mesh(me, ob);
449         
450         if(!dm)
451                 return NULL;
452         
453         if (vertCos)
454                 CDDM_apply_vert_coords(dm, vertCos);
455
456         CDDM_calc_normals(dm);
457
458         return dm;
459 }
460
461 DerivedMesh *mesh_create_derived_for_modifier(Scene *scene, Object *ob, ModifierData *md)
462 {
463         Mesh *me = ob->data;
464         ModifierTypeInfo *mti = modifierType_getInfo(md->type);
465         DerivedMesh *dm;
466
467         md->scene= scene;
468         
469         if (!(md->mode&eModifierMode_Realtime)) return NULL;
470         if (mti->isDisabled && mti->isDisabled(md, 0)) return NULL;
471
472         if (mti->type==eModifierTypeType_OnlyDeform) {
473                 int numVerts;
474                 float (*deformedVerts)[3] = mesh_getVertexCos(me, &numVerts);
475
476                 mti->deformVerts(md, ob, NULL, deformedVerts, numVerts, 0, 0);
477                 dm = mesh_create_derived(me, ob, deformedVerts);
478
479                 MEM_freeN(deformedVerts);
480         } else {
481                 DerivedMesh *tdm = mesh_create_derived(me, ob, NULL);
482                 dm = mti->applyModifier(md, ob, tdm, 0, 0);
483
484                 if(tdm != dm) tdm->release(tdm);
485         }
486
487         return dm;
488 }
489
490 static float *get_editmesh_orco_verts(EditMesh *em)
491 {
492         EditVert *eve;
493         float *orco;
494         int a, totvert;
495
496         /* these may not really be the orco's, but it's only for preview.
497          * could be solver better once, but isn't simple */
498
499         totvert= 0;
500         for(eve=em->verts.first; eve; eve=eve->next)
501                 totvert++;
502         
503         orco = MEM_mallocN(sizeof(float)*3*totvert, "EditMesh Orco");
504
505         for(a=0, eve=em->verts.first; eve; eve=eve->next, a+=3) {
506                 copy_v3_v3(orco+a, eve->co);
507         }
508         
509         return orco;
510 }
511
512 /* orco custom data layer */
513
514 static void *get_orco_coords_dm(Object *ob, EditMesh *em, int layer, int *free)
515 {
516         *free= 0;
517
518         if(layer == CD_ORCO) {
519                 /* get original coordinates */
520                 *free= 1;
521
522                 if(em)
523                         return (float(*)[3])get_editmesh_orco_verts(em);
524                 else
525                         return (float(*)[3])get_mesh_orco_verts(ob);
526         }
527         else if(layer == CD_CLOTH_ORCO) {
528                 /* apply shape key for cloth, this should really be solved
529                    by a more flexible customdata system, but not simple */
530                 if(!em) {
531                         ClothModifierData *clmd = (ClothModifierData *)modifiers_findByType(ob, eModifierType_Cloth);
532                         KeyBlock *kb= key_get_keyblock(ob_get_key(ob), clmd->sim_parms->shapekey_rest);
533
534                         if(kb->data)
535                                 return kb->data;
536                 }
537
538                 return NULL;
539         }
540
541         return NULL;
542 }
543
544 static DerivedMesh *create_orco_dm(Object *ob, Mesh *me, EditMesh *em, int layer)
545 {
546         DerivedMesh *dm;
547         float (*orco)[3];
548         int free;
549
550         if(em) dm= CDDM_from_editmesh(em, me);
551         else dm= CDDM_from_mesh(me, ob);
552
553         orco= get_orco_coords_dm(ob, em, layer, &free);
554
555         if(orco) {
556                 CDDM_apply_vert_coords(dm, orco);
557                 if(free) MEM_freeN(orco);
558         }
559
560         CDDM_calc_normals(dm);
561
562         return dm;
563 }
564
565 static void add_orco_dm(Object *ob, EditMesh *em, DerivedMesh *dm, DerivedMesh *orcodm, int layer)
566 {
567         float (*orco)[3], (*layerorco)[3];
568         int totvert, free;
569
570         totvert= dm->getNumVerts(dm);
571
572         if(orcodm) {
573                 orco= MEM_callocN(sizeof(float)*3*totvert, "dm orco");
574                 free= 1;
575
576                 if(orcodm->getNumVerts(orcodm) == totvert)
577                         orcodm->getVertCos(orcodm, orco);
578                 else
579                         dm->getVertCos(dm, orco);
580         }
581         else
582                 orco= get_orco_coords_dm(ob, em, layer, &free);
583
584         if(orco) {
585                 if(layer == CD_ORCO)
586                         transform_mesh_orco_verts(ob->data, orco, totvert, 0);
587
588                 if(!(layerorco = DM_get_vert_data_layer(dm, layer))) {
589                         DM_add_vert_layer(dm, layer, CD_CALLOC, NULL);
590                         layerorco = DM_get_vert_data_layer(dm, layer);
591                 }
592
593                 memcpy(layerorco, orco, sizeof(float)*3*totvert);
594                 if(free) MEM_freeN(orco);
595         }
596 }
597
598 /* weight paint colors */
599
600 /* Something of a hack, at the moment deal with weightpaint
601  * by tucking into colors during modifier eval, only in
602  * wpaint mode. Works ok but need to make sure recalc
603  * happens on enter/exit wpaint.
604  */
605
606 void weight_to_rgb(float r_rgb[3], const float weight)
607 {
608         const float blend= ((weight/2.0f)+0.5f);
609
610         if (weight<=0.25f){     // blue->cyan
611                 r_rgb[0]= 0.0f;
612                 r_rgb[1]= blend*weight*4.0f;
613                 r_rgb[2]= blend;
614         }
615         else if (weight<=0.50f){        // cyan->green
616                 r_rgb[0]= 0.0f;
617                 r_rgb[1]= blend;
618                 r_rgb[2]= blend*(1.0f-((weight-0.25f)*4.0f));
619         }
620         else if (weight <= 0.75f){      // green->yellow
621                 r_rgb[0]= blend * ((weight-0.50f)*4.0f);
622                 r_rgb[1]= blend;
623                 r_rgb[2]= 0.0f;
624         }
625         else if (weight <= 1.0f){ // yellow->red
626                 r_rgb[0]= blend;
627                 r_rgb[1]= blend * (1.0f-((weight-0.75f)*4.0f));
628                 r_rgb[2]= 0.0f;
629         }
630         else {
631                 /* exceptional value, unclamped or nan,
632                  * avoid uninitialized memory use */
633                 r_rgb[0]= 1.0f;
634                 r_rgb[1]= 0.0f;
635                 r_rgb[2]= 1.0f;
636         }
637 }
638
639 /* draw_flag's for calc_weightpaint_vert_color */
640 enum {
641         CALC_WP_MULTIPAINT= (1<<0),
642         CALC_WP_AUTO_NORMALIZE= (1<<1)
643 };
644
645 static void calc_weightpaint_vert_color(
646         Object *ob, const int defbase_tot, ColorBand *coba, int vert, unsigned char *col,
647         const char *dg_flags, int selected, int UNUSED(unselected), const int draw_flag)
648 {
649         Mesh *me = ob->data;
650         float input = 0.0f;
651         
652         int make_black= FALSE;
653
654         if (me->dvert) {
655                 MDeformVert *dvert= &me->dvert[vert];
656
657                 if ((selected > 1) && (draw_flag & CALC_WP_MULTIPAINT)) {
658                         int was_a_nonzero= FALSE;
659                         int i;
660
661                         MDeformWeight *dw= dvert->dw;
662                         for (i = dvert->totweight; i > 0; i--, dw++) {
663                                 /* in multipaint, get the average if auto normalize is inactive
664                                  * get the sum if it is active */
665                                 if (dw->def_nr < defbase_tot) {
666                                         if (dg_flags[dw->def_nr]) {
667                                                 if (dw->weight) {
668                                                         input += dw->weight;
669                                                         was_a_nonzero= TRUE;
670                                                 }
671                                         }
672                                 }
673                         }
674
675                         /* make it black if the selected groups have no weight on a vertex */
676                         if (was_a_nonzero == FALSE) {
677                                 make_black = TRUE;
678                         }
679                         else if ((draw_flag & CALC_WP_AUTO_NORMALIZE) == FALSE) {
680                                 input /= selected; /* get the average */
681                         }
682                 }
683                 else {
684                         /* default, non tricky behavior */
685                         input= defvert_find_weight(dvert, ob->actdef-1);
686                 }
687         }
688         
689         if (make_black) {
690                 col[3] = 0;
691                 col[2] = 0;
692                 col[1] = 0;
693                 col[0] = 255;
694         }
695         else {
696                 float colf[4];
697                 CLAMP(input, 0.0f, 1.0f);
698
699                 if(coba) do_colorband(coba, input, colf);
700                 else     weight_to_rgb(colf, input);
701
702                 col[3] = (unsigned char)(colf[0] * 255.0f);
703                 col[2] = (unsigned char)(colf[1] * 255.0f);
704                 col[1] = (unsigned char)(colf[2] * 255.0f);
705                 col[0] = 255;
706         }
707 }
708
709 static ColorBand *stored_cb= NULL;
710
711 void vDM_ColorBand_store(ColorBand *coba)
712 {
713         stored_cb= coba;
714 }
715
716 static void add_weight_mcol_dm(Object *ob, DerivedMesh *dm, int const draw_flag)
717 {
718         Mesh *me = ob->data;
719         MFace *mf = me->mface;
720         ColorBand *coba= stored_cb;     /* warning, not a local var */
721         unsigned char *wtcol;
722         int i;
723         
724         int defbase_tot = BLI_countlist(&ob->defbase);
725         char *defbase_sel = MEM_mallocN(defbase_tot * sizeof(char), __func__);
726         int selected = get_selected_defgroups(ob, defbase_sel, defbase_tot);
727         int unselected = defbase_tot - selected;
728
729         wtcol = MEM_callocN (sizeof (unsigned char) * me->totface*4*4, "weightmap");
730         
731         memset(wtcol, 0x55, sizeof (unsigned char) * me->totface*4*4);
732         for (i=0; i<me->totface; i++, mf++) {
733                 calc_weightpaint_vert_color(ob, defbase_tot, coba, mf->v1, &wtcol[(i*4 + 0)*4], defbase_sel, selected, unselected, draw_flag);
734                 calc_weightpaint_vert_color(ob, defbase_tot, coba, mf->v2, &wtcol[(i*4 + 1)*4], defbase_sel, selected, unselected, draw_flag);
735                 calc_weightpaint_vert_color(ob, defbase_tot, coba, mf->v3, &wtcol[(i*4 + 2)*4], defbase_sel, selected, unselected, draw_flag);
736                 if (mf->v4)
737                         calc_weightpaint_vert_color(ob, defbase_tot, coba, mf->v4, &wtcol[(i*4 + 3)*4], defbase_sel, selected, unselected, draw_flag);
738         }
739         
740         MEM_freeN(defbase_sel);
741
742         CustomData_add_layer(&dm->faceData, CD_WEIGHT_MCOL, CD_ASSIGN, wtcol, dm->numFaceData);
743 }
744
745 /* new value for useDeform -1  (hack for the gameengine):
746  * - apply only the modifier stack of the object, skipping the virtual modifiers,
747  * - don't apply the key
748  * - apply deform modifiers and input vertexco
749  */
750 static void mesh_calc_modifiers(Scene *scene, Object *ob, float (*inputVertexCos)[3],
751                                                                 DerivedMesh **deform_r, DerivedMesh **final_r,
752                                                                 int useRenderParams, int useDeform,
753                                                                 int needMapping, CustomDataMask dataMask, int index, int useCache)
754 {
755         Mesh *me = ob->data;
756         ModifierData *firstmd, *md;
757         LinkNode *datamasks, *curr;
758         CustomDataMask mask, nextmask, append_mask = 0;
759         float (*deformedVerts)[3] = NULL;
760         DerivedMesh *dm, *orcodm, *clothorcodm, *finaldm;
761         int numVerts = me->totvert;
762         int required_mode;
763         int isPrevDeform= FALSE;
764         int skipVirtualArmature = (useDeform < 0);
765         MultiresModifierData *mmd= get_multires_modifier(scene, ob, 0);
766         int has_multires = mmd != NULL, multires_applied = 0;
767         int sculpt_mode = ob->mode & OB_MODE_SCULPT && ob->sculpt;
768
769         int draw_flag= ((scene->toolsettings->multipaint ? CALC_WP_MULTIPAINT : 0) |
770                         (scene->toolsettings->auto_normalize ? CALC_WP_AUTO_NORMALIZE : 0));
771
772         if(mmd && !mmd->sculptlvl)
773                 has_multires = 0;
774
775         if(!skipVirtualArmature) {
776                 firstmd = modifiers_getVirtualModifierList(ob);
777         }
778         else {
779                 /* game engine exception */
780                 firstmd = ob->modifiers.first;
781                 if(firstmd && firstmd->type == eModifierType_Armature)
782                         firstmd = firstmd->next;
783         }
784
785         md = firstmd;
786
787         modifiers_clearErrors(ob);
788
789         if(useRenderParams) required_mode = eModifierMode_Render;
790         else required_mode = eModifierMode_Realtime;
791
792         datamasks = modifiers_calcDataMasks(scene, ob, md, dataMask, required_mode);
793         curr = datamasks;
794
795         if(deform_r) *deform_r = NULL;
796         *final_r = NULL;
797
798         if(useDeform) {
799                 if(inputVertexCos)
800                         deformedVerts = inputVertexCos;
801                 
802                 /* Apply all leading deforming modifiers */
803                 for(;md; md = md->next, curr = curr->next) {
804                         ModifierTypeInfo *mti = modifierType_getInfo(md->type);
805
806                         md->scene= scene;
807                         
808                         if(!modifier_isEnabled(scene, md, required_mode)) continue;
809                         if(useDeform < 0 && mti->dependsOnTime && mti->dependsOnTime(md)) continue;
810
811                         if(mti->type == eModifierTypeType_OnlyDeform) {
812                                 if(!deformedVerts)
813                                         deformedVerts = mesh_getVertexCos(me, &numVerts);
814
815                                 mti->deformVerts(md, ob, NULL, deformedVerts, numVerts, useRenderParams, useDeform);
816                         } else {
817                                 break;
818                         }
819                         
820                         /* grab modifiers until index i */
821                         if((index >= 0) && (modifiers_indexInObject(ob, md) >= index))
822                                 break;
823                 }
824
825                 /* Result of all leading deforming modifiers is cached for
826                  * places that wish to use the original mesh but with deformed
827                  * coordinates (vpaint, etc.)
828                  */
829                 if (deform_r) {
830                         *deform_r = CDDM_from_mesh(me, ob);
831
832                         if(deformedVerts) {
833                                 CDDM_apply_vert_coords(*deform_r, deformedVerts);
834                                 CDDM_calc_normals(*deform_r);
835                         }
836                 }
837         } else {
838                 /* default behaviour for meshes */
839                 if(inputVertexCos)
840                         deformedVerts = inputVertexCos;
841                 else
842                         deformedVerts = mesh_getVertexCos(me, &numVerts);
843         }
844
845
846         /* Now apply all remaining modifiers. If useDeform is off then skip
847          * OnlyDeform ones. 
848          */
849         dm = NULL;
850         orcodm = NULL;
851         clothorcodm = NULL;
852
853         for(;md; md = md->next, curr = curr->next) {
854                 ModifierTypeInfo *mti = modifierType_getInfo(md->type);
855
856                 md->scene= scene;
857
858                 if(!modifier_isEnabled(scene, md, required_mode)) continue;
859                 if(mti->type == eModifierTypeType_OnlyDeform && !useDeform) continue;
860                 if((mti->flags & eModifierTypeFlag_RequiresOriginalData) && dm) {
861                         modifier_setError(md, "Modifier requires original data, bad stack position.");
862                         continue;
863                 }
864                 if(sculpt_mode && (!has_multires || multires_applied)) {
865                         int unsupported= 0;
866
867                         if(scene->toolsettings->sculpt->flags & SCULPT_ONLY_DEFORM)
868                                 unsupported|= mti->type != eModifierTypeType_OnlyDeform;
869
870                         unsupported|= md->type == eModifierType_Multires && ((MultiresModifierData*)md)->sculptlvl==0;
871                         unsupported|= multires_applied;
872
873                         if(unsupported) {
874                                 modifier_setError(md, "Not supported in sculpt mode.");
875                                 continue;
876                         }
877                 }
878                 if(needMapping && !modifier_supportsMapping(md)) continue;
879                 if(useDeform < 0 && mti->dependsOnTime && mti->dependsOnTime(md)) continue;
880
881                 /* add an orco layer if needed by this modifier */
882                 if(mti->requiredDataMask)
883                         mask = mti->requiredDataMask(ob, md);
884                 else
885                         mask = 0;
886
887                 if(dm && (mask & CD_MASK_ORCO))
888                         add_orco_dm(ob, NULL, dm, orcodm, CD_ORCO);
889
890                 /* How to apply modifier depends on (a) what we already have as
891                  * a result of previous modifiers (could be a DerivedMesh or just
892                  * deformed vertices) and (b) what type the modifier is.
893                  */
894
895                 if(mti->type == eModifierTypeType_OnlyDeform) {
896                         /* No existing verts to deform, need to build them. */
897                         if(!deformedVerts) {
898                                 if(dm) {
899                                         /* Deforming a derived mesh, read the vertex locations
900                                          * out of the mesh and deform them. Once done with this
901                                          * run of deformers verts will be written back.
902                                          */
903                                         numVerts = dm->getNumVerts(dm);
904                                         deformedVerts =
905                                                 MEM_mallocN(sizeof(*deformedVerts) * numVerts, "dfmv");
906                                         dm->getVertCos(dm, deformedVerts);
907                                 } else {
908                                         deformedVerts = mesh_getVertexCos(me, &numVerts);
909                                 }
910                         }
911
912                         /* if this is not the last modifier in the stack then recalculate the normals
913                          * to avoid giving bogus normals to the next modifier see: [#23673] */
914                         if(isPrevDeform &&  mti->dependsOnNormals && mti->dependsOnNormals(md)) {
915                                 /* XXX, this covers bug #23673, but we may need normal calc for other types */
916                                 if(dm && dm->type == DM_TYPE_CDDM) {
917                                         CDDM_apply_vert_coords(dm, deformedVerts);
918                                         CDDM_calc_normals(dm);
919                                 }
920                         }
921
922                         mti->deformVerts(md, ob, dm, deformedVerts, numVerts, useRenderParams, useDeform);
923                 } else {
924                         DerivedMesh *ndm;
925
926                         /* determine which data layers are needed by following modifiers */
927                         if(curr->next)
928                                 nextmask= (CustomDataMask)GET_INT_FROM_POINTER(curr->next->link);
929                         else
930                                 nextmask= dataMask;
931
932                         /* apply vertex coordinates or build a DerivedMesh as necessary */
933                         if(dm) {
934                                 if(deformedVerts) {
935                                         DerivedMesh *tdm = CDDM_copy(dm);
936                                         dm->release(dm);
937                                         dm = tdm;
938
939                                         CDDM_apply_vert_coords(dm, deformedVerts);
940                                         CDDM_calc_normals(dm);
941                                 }
942                         } else {
943                                 dm = CDDM_from_mesh(me, ob);
944
945                                 if(deformedVerts) {
946                                         CDDM_apply_vert_coords(dm, deformedVerts);
947                                         CDDM_calc_normals(dm);
948                                 }
949
950                                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
951                                         add_weight_mcol_dm(ob, dm, draw_flag); 
952
953                                 /* Constructive modifiers need to have an origindex
954                                  * otherwise they wont have anywhere to copy the data from.
955                                  *
956                                  * Also create ORIGINDEX data if any of the following modifiers
957                                  * requests it, this way Mirror, Solidify etc will keep ORIGINDEX
958                                  * data by using generic DM_copy_vert_data() functions.
959                                  */
960                                 if(needMapping || (nextmask & CD_MASK_ORIGINDEX)) {
961                                         /* calc */
962                                         DM_add_vert_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
963                                         DM_add_edge_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
964                                         DM_add_face_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
965
966                                         range_vn_i(DM_get_vert_data_layer(dm, CD_ORIGINDEX), dm->numVertData, 0);
967                                         range_vn_i(DM_get_edge_data_layer(dm, CD_ORIGINDEX), dm->numEdgeData, 0);
968                                         range_vn_i(DM_get_face_data_layer(dm, CD_ORIGINDEX), dm->numFaceData, 0);
969                                 }
970                         }
971
972                         
973                         /* set the DerivedMesh to only copy needed data */
974                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link);
975                         /* needMapping check here fixes bug [#28112], otherwise its
976                          * possible that it wont be copied */
977                         mask |= append_mask;
978                         DM_set_only_copy(dm, mask | (needMapping ? CD_MASK_ORIGINDEX : 0));
979                         
980                         /* add cloth rest shape key if need */
981                         if(mask & CD_MASK_CLOTH_ORCO)
982                                 add_orco_dm(ob, NULL, dm, clothorcodm, CD_CLOTH_ORCO);
983
984                         /* add an origspace layer if needed */
985                         if(((CustomDataMask)GET_INT_FROM_POINTER(curr->link)) & CD_MASK_ORIGSPACE)
986                                 if(!CustomData_has_layer(&dm->faceData, CD_ORIGSPACE))
987                                         DM_add_face_layer(dm, CD_ORIGSPACE, CD_DEFAULT, NULL);
988
989                         ndm = mti->applyModifier(md, ob, dm, useRenderParams, useCache);
990
991                         if(ndm) {
992                                 /* if the modifier returned a new dm, release the old one */
993                                 if(dm && dm != ndm) dm->release(dm);
994
995                                 dm = ndm;
996
997                                 if(deformedVerts) {
998                                         if(deformedVerts != inputVertexCos)
999                                                 MEM_freeN(deformedVerts);
1000
1001                                         deformedVerts = NULL;
1002                                 }
1003                         } 
1004
1005                         /* create an orco derivedmesh in parallel */
1006                         if(nextmask & CD_MASK_ORCO) {
1007                                 if(!orcodm)
1008                                         orcodm= create_orco_dm(ob, me, NULL, CD_ORCO);
1009
1010                                 nextmask &= ~CD_MASK_ORCO;
1011                                 DM_set_only_copy(orcodm, nextmask | CD_MASK_ORIGINDEX);
1012                                 ndm = mti->applyModifier(md, ob, orcodm, useRenderParams, 0);
1013
1014                                 if(ndm) {
1015                                         /* if the modifier returned a new dm, release the old one */
1016                                         if(orcodm && orcodm != ndm) orcodm->release(orcodm);
1017                                         orcodm = ndm;
1018                                 }
1019                         }
1020
1021                         /* create cloth orco derivedmesh in parallel */
1022                         if(nextmask & CD_MASK_CLOTH_ORCO) {
1023                                 if(!clothorcodm)
1024                                         clothorcodm= create_orco_dm(ob, me, NULL, CD_CLOTH_ORCO);
1025
1026                                 nextmask &= ~CD_MASK_CLOTH_ORCO;
1027                                 DM_set_only_copy(clothorcodm, nextmask | CD_MASK_ORIGINDEX);
1028                                 ndm = mti->applyModifier(md, ob, clothorcodm, useRenderParams, 0);
1029
1030                                 if(ndm) {
1031                                         /* if the modifier returned a new dm, release the old one */
1032                                         if(clothorcodm && clothorcodm != ndm) clothorcodm->release(clothorcodm);
1033                                         clothorcodm = ndm;
1034                                 }
1035                         }
1036
1037                         /* in case of dynamic paint, make sure preview mask remains for following modifiers */
1038                         if (md->type == eModifierType_DynamicPaint)
1039                                 append_mask |= CD_MASK_WEIGHT_MCOL;
1040                 }
1041
1042                 isPrevDeform= (mti->type == eModifierTypeType_OnlyDeform);
1043
1044                 /* grab modifiers until index i */
1045                 if((index >= 0) && (modifiers_indexInObject(ob, md) >= index))
1046                         break;
1047
1048                 if(sculpt_mode && md->type == eModifierType_Multires)
1049                         multires_applied = 1;
1050         }
1051
1052         for(md=firstmd; md; md=md->next)
1053                 modifier_freeTemporaryData(md);
1054
1055         /* Yay, we are done. If we have a DerivedMesh and deformed vertices
1056          * need to apply these back onto the DerivedMesh. If we have no
1057          * DerivedMesh then we need to build one.
1058          */
1059         if(dm && deformedVerts) {
1060                 finaldm = CDDM_copy(dm);
1061
1062                 dm->release(dm);
1063
1064                 CDDM_apply_vert_coords(finaldm, deformedVerts);
1065                 CDDM_calc_normals(finaldm);
1066
1067                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
1068                         add_weight_mcol_dm(ob, finaldm, draw_flag);
1069         } else if(dm) {
1070                 finaldm = dm;
1071         } else {
1072                 finaldm = CDDM_from_mesh(me, ob);
1073
1074                 if(deformedVerts) {
1075                         CDDM_apply_vert_coords(finaldm, deformedVerts);
1076                         CDDM_calc_normals(finaldm);
1077                 }
1078
1079                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
1080                         add_weight_mcol_dm(ob, finaldm, draw_flag);
1081         }
1082
1083         /* add an orco layer if needed */
1084         if(dataMask & CD_MASK_ORCO) {
1085                 add_orco_dm(ob, NULL, finaldm, orcodm, CD_ORCO);
1086
1087                 if(deform_r && *deform_r)
1088                         add_orco_dm(ob, NULL, *deform_r, NULL, CD_ORCO);
1089         }
1090
1091 #ifdef WITH_GAMEENGINE
1092         /* NavMesh - this is a hack but saves having a NavMesh modifier */
1093         if ((ob->gameflag & OB_NAVMESH) && (finaldm->type == DM_TYPE_CDDM)) {
1094                 DerivedMesh *tdm;
1095                 tdm= navmesh_dm_createNavMeshForVisualization(finaldm);
1096                 if (finaldm != tdm) {
1097                         finaldm->release(finaldm);
1098                         finaldm= tdm;
1099                 }
1100         }
1101 #endif /* WITH_GAMEENGINE */
1102
1103         *final_r = finaldm;
1104
1105         if(orcodm)
1106                 orcodm->release(orcodm);
1107         if(clothorcodm)
1108                 clothorcodm->release(clothorcodm);
1109
1110         if(deformedVerts && deformedVerts != inputVertexCos)
1111                 MEM_freeN(deformedVerts);
1112
1113         BLI_linklist_free(datamasks, NULL);
1114 }
1115
1116 float (*editmesh_get_vertex_cos(EditMesh *em, int *numVerts_r))[3]
1117 {
1118         int i, numVerts = *numVerts_r = BLI_countlist(&em->verts);
1119         float (*cos)[3];
1120         EditVert *eve;
1121
1122         cos = MEM_mallocN(sizeof(*cos)*numVerts, "vertexcos");
1123         for (i=0,eve=em->verts.first; i<numVerts; i++,eve=eve->next) {
1124                 copy_v3_v3(cos[i], eve->co);
1125         }
1126
1127         return cos;
1128 }
1129
1130 int editmesh_modifier_is_enabled(Scene *scene, ModifierData *md, DerivedMesh *dm)
1131 {
1132         ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1133         int required_mode = eModifierMode_Realtime | eModifierMode_Editmode;
1134
1135         if(!modifier_isEnabled(scene, md, required_mode)) return 0;
1136         if((mti->flags & eModifierTypeFlag_RequiresOriginalData) && dm) {
1137                 modifier_setError(md, "Modifier requires original data, bad stack position.");
1138                 return 0;
1139         }
1140         
1141         return 1;
1142 }
1143
1144 static void editmesh_calc_modifiers(Scene *scene, Object *ob, EditMesh *em, DerivedMesh **cage_r,
1145                                                                         DerivedMesh **final_r,
1146                                                                         CustomDataMask dataMask)
1147 {
1148         ModifierData *md;
1149         float (*deformedVerts)[3] = NULL;
1150         CustomDataMask mask;
1151         DerivedMesh *dm, *orcodm = NULL;
1152         int i, numVerts = 0, cageIndex = modifiers_getCageIndex(scene, ob, NULL, 1);
1153         LinkNode *datamasks, *curr;
1154         int required_mode = eModifierMode_Realtime | eModifierMode_Editmode;
1155
1156         modifiers_clearErrors(ob);
1157
1158         if(cage_r && cageIndex == -1) {
1159                 *cage_r = editmesh_get_derived(em, NULL);
1160         }
1161
1162         dm = NULL;
1163         md = modifiers_getVirtualModifierList(ob);
1164
1165         datamasks = modifiers_calcDataMasks(scene, ob, md, dataMask, required_mode);
1166
1167         curr = datamasks;
1168         for(i = 0; md; i++, md = md->next, curr = curr->next) {
1169                 ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1170
1171                 md->scene= scene;
1172                 
1173                 if(!editmesh_modifier_is_enabled(scene, md, dm))
1174                         continue;
1175
1176                 /* add an orco layer if needed by this modifier */
1177                 if(dm && mti->requiredDataMask) {
1178                         mask = mti->requiredDataMask(ob, md);
1179                         if(mask & CD_MASK_ORCO)
1180                                 add_orco_dm(ob, em, dm, orcodm, CD_ORCO);
1181                 }
1182
1183                 /* How to apply modifier depends on (a) what we already have as
1184                  * a result of previous modifiers (could be a DerivedMesh or just
1185                  * deformed vertices) and (b) what type the modifier is.
1186                  */
1187
1188                 if(mti->type == eModifierTypeType_OnlyDeform) {
1189                         /* No existing verts to deform, need to build them. */
1190                         if(!deformedVerts) {
1191                                 if(dm) {
1192                                         /* Deforming a derived mesh, read the vertex locations
1193                                          * out of the mesh and deform them. Once done with this
1194                                          * run of deformers verts will be written back.
1195                                          */
1196                                         numVerts = dm->getNumVerts(dm);
1197                                         deformedVerts =
1198                                                 MEM_mallocN(sizeof(*deformedVerts) * numVerts, "dfmv");
1199                                         dm->getVertCos(dm, deformedVerts);
1200                                 } else {
1201                                         deformedVerts = editmesh_get_vertex_cos(em, &numVerts);
1202                                 }
1203                         }
1204
1205                         if (mti->deformVertsEM)
1206                                 mti->deformVertsEM(md, ob, em, dm, deformedVerts, numVerts);
1207                         else mti->deformVerts(md, ob, dm, deformedVerts, numVerts, 0, 0);
1208                 } else {
1209                         DerivedMesh *ndm;
1210
1211                         /* apply vertex coordinates or build a DerivedMesh as necessary */
1212                         if(dm) {
1213                                 if(deformedVerts) {
1214                                         DerivedMesh *tdm = CDDM_copy(dm);
1215                                         if(!(cage_r && dm == *cage_r)) dm->release(dm);
1216                                         dm = tdm;
1217
1218                                         CDDM_apply_vert_coords(dm, deformedVerts);
1219                                         CDDM_calc_normals(dm);
1220                                 } else if(cage_r && dm == *cage_r) {
1221                                         /* dm may be changed by this modifier, so we need to copy it
1222                                          */
1223                                         dm = CDDM_copy(dm);
1224                                 }
1225
1226                         } else {
1227                                 dm = CDDM_from_editmesh(em, ob->data);
1228
1229                                 if(deformedVerts) {
1230                                         CDDM_apply_vert_coords(dm, deformedVerts);
1231                                         CDDM_calc_normals(dm);
1232                                 }
1233                         }
1234
1235                         /* create an orco derivedmesh in parallel */
1236                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link);
1237                         if(mask & CD_MASK_ORCO) {
1238                                 if(!orcodm)
1239                                         orcodm= create_orco_dm(ob, ob->data, em, CD_ORCO);
1240
1241                                 mask &= ~CD_MASK_ORCO;
1242                                 DM_set_only_copy(orcodm, mask | CD_MASK_ORIGINDEX);
1243
1244                                 if (mti->applyModifierEM)
1245                                         ndm = mti->applyModifierEM(md, ob, em, orcodm);
1246                                 else
1247                                         ndm = mti->applyModifier(md, ob, orcodm, 0, 0);
1248
1249                                 if(ndm) {
1250                                         /* if the modifier returned a new dm, release the old one */
1251                                         if(orcodm && orcodm != ndm) orcodm->release(orcodm);
1252                                         orcodm = ndm;
1253                                 }
1254                         }
1255
1256                         /* set the DerivedMesh to only copy needed data */
1257                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link); /* CD_MASK_ORCO may have been cleared above */
1258
1259                         DM_set_only_copy(dm, mask | CD_MASK_ORIGINDEX);
1260
1261                         if(mask & CD_MASK_ORIGSPACE)
1262                                 if(!CustomData_has_layer(&dm->faceData, CD_ORIGSPACE))
1263                                         DM_add_face_layer(dm, CD_ORIGSPACE, CD_DEFAULT, NULL);
1264                         
1265                         if (mti->applyModifierEM)
1266                                 ndm = mti->applyModifierEM(md, ob, em, dm);
1267                         else
1268                                 ndm = mti->applyModifier(md, ob, dm, 0, 0);
1269
1270                         if (ndm) {
1271                                 if(dm && dm != ndm)
1272                                         dm->release(dm);
1273
1274                                 dm = ndm;
1275
1276                                 if (deformedVerts) {
1277                                         MEM_freeN(deformedVerts);
1278                                         deformedVerts = NULL;
1279                                 }
1280                         }
1281                 }
1282
1283                 if(cage_r && i == cageIndex) {
1284                         if(dm && deformedVerts) {
1285                                 *cage_r = CDDM_copy(dm);
1286                                 CDDM_apply_vert_coords(*cage_r, deformedVerts);
1287                         } else if(dm) {
1288                                 *cage_r = dm;
1289                         } else {
1290                                 *cage_r =
1291                                         editmesh_get_derived(em,
1292                                                 deformedVerts ? MEM_dupallocN(deformedVerts) : NULL);
1293                         }
1294                 }
1295         }
1296
1297         BLI_linklist_free(datamasks, NULL);
1298
1299         /* Yay, we are done. If we have a DerivedMesh and deformed vertices need
1300          * to apply these back onto the DerivedMesh. If we have no DerivedMesh
1301          * then we need to build one.
1302          */
1303         if(dm && deformedVerts) {
1304                 *final_r = CDDM_copy(dm);
1305
1306                 if(!(cage_r && dm == *cage_r)) dm->release(dm);
1307
1308                 CDDM_apply_vert_coords(*final_r, deformedVerts);
1309                 CDDM_calc_normals(*final_r);
1310         } else if (dm) {
1311                 *final_r = dm;
1312         } else if (!deformedVerts && cage_r && *cage_r) {
1313                 *final_r = *cage_r;
1314         } else {
1315                 *final_r = editmesh_get_derived(em, deformedVerts);
1316                 deformedVerts = NULL;
1317         }
1318
1319         /* add an orco layer if needed */
1320         if(dataMask & CD_MASK_ORCO)
1321                 add_orco_dm(ob, em, *final_r, orcodm, CD_ORCO);
1322
1323         if(orcodm)
1324                 orcodm->release(orcodm);
1325
1326         if(deformedVerts)
1327                 MEM_freeN(deformedVerts);
1328 }
1329
1330 static void clear_mesh_caches(Object *ob)
1331 {
1332         Mesh *me= ob->data;
1333
1334                 /* also serves as signal to remake texspace */
1335         if (ob->bb) {
1336                 MEM_freeN(ob->bb);
1337                 ob->bb = NULL;
1338         }
1339         if (me->bb) {
1340                 MEM_freeN(me->bb);
1341                 me->bb = NULL;
1342         }
1343
1344         freedisplist(&ob->disp);
1345
1346         if (ob->derivedFinal) {
1347                 ob->derivedFinal->needsFree = 1;
1348                 ob->derivedFinal->release(ob->derivedFinal);
1349                 ob->derivedFinal= NULL;
1350         }
1351         if (ob->derivedDeform) {
1352                 ob->derivedDeform->needsFree = 1;
1353                 ob->derivedDeform->release(ob->derivedDeform);
1354                 ob->derivedDeform= NULL;
1355         }
1356
1357         if(ob->sculpt) {
1358                 object_sculpt_modifiers_changed(ob);
1359         }
1360 }
1361
1362 static void mesh_build_data(Scene *scene, Object *ob, CustomDataMask dataMask)
1363 {
1364         Object *obact = scene->basact?scene->basact->object:NULL;
1365         int editing = paint_facesel_test(ob) || paint_vertsel_test(ob);/* paint_vertsel_test */
1366         /* weight paint and face select need original indices because of selection buffer drawing */
1367         int needMapping = (ob==obact) && (editing || (ob->mode & (OB_MODE_WEIGHT_PAINT|OB_MODE_VERTEX_PAINT)));
1368
1369         clear_mesh_caches(ob);
1370
1371         mesh_calc_modifiers(scene, ob, NULL, &ob->derivedDeform,
1372                                                 &ob->derivedFinal, 0, 1,
1373                                                 needMapping, dataMask, -1, 1);
1374
1375         DM_set_object_boundbox (ob, ob->derivedFinal);
1376
1377         ob->derivedFinal->needsFree = 0;
1378         ob->derivedDeform->needsFree = 0;
1379         ob->lastDataMask = dataMask;
1380 }
1381
1382 static void editmesh_build_data(Scene *scene, Object *obedit, EditMesh *em, CustomDataMask dataMask)
1383 {
1384         clear_mesh_caches(obedit);
1385
1386         if (em->derivedFinal) {
1387                 if (em->derivedFinal!=em->derivedCage) {
1388                         em->derivedFinal->needsFree = 1;
1389                         em->derivedFinal->release(em->derivedFinal);
1390                 }
1391                 em->derivedFinal = NULL;
1392         }
1393         if (em->derivedCage) {
1394                 em->derivedCage->needsFree = 1;
1395                 em->derivedCage->release(em->derivedCage);
1396                 em->derivedCage = NULL;
1397         }
1398
1399         editmesh_calc_modifiers(scene, obedit, em, &em->derivedCage, &em->derivedFinal, dataMask);
1400         DM_set_object_boundbox (obedit, em->derivedFinal);
1401
1402         em->lastDataMask = dataMask;
1403         em->derivedFinal->needsFree = 0;
1404         em->derivedCage->needsFree = 0;
1405 }
1406
1407 void makeDerivedMesh(Scene *scene, Object *ob, EditMesh *em, CustomDataMask dataMask)
1408 {
1409         if (em) {
1410                 editmesh_build_data(scene, ob, em, dataMask);
1411         } else {
1412                 mesh_build_data(scene, ob, dataMask);
1413         }
1414 }
1415
1416 /***/
1417
1418 DerivedMesh *mesh_get_derived_final(Scene *scene, Object *ob, CustomDataMask dataMask)
1419 {
1420         /* if there's no derived mesh or the last data mask used doesn't include
1421          * the data we need, rebuild the derived mesh
1422          */
1423         if(!ob->derivedFinal || (dataMask & ob->lastDataMask) != dataMask)
1424                 mesh_build_data(scene, ob, dataMask);
1425
1426         return ob->derivedFinal;
1427 }
1428
1429 DerivedMesh *mesh_get_derived_deform(Scene *scene, Object *ob, CustomDataMask dataMask)
1430 {
1431         /* if there's no derived mesh or the last data mask used doesn't include
1432          * the data we need, rebuild the derived mesh
1433          */
1434         if(!ob->derivedDeform || (dataMask & ob->lastDataMask) != dataMask)
1435                 mesh_build_data(scene, ob, dataMask);
1436
1437         return ob->derivedDeform;
1438 }
1439
1440 DerivedMesh *mesh_create_derived_render(Scene *scene, Object *ob, CustomDataMask dataMask)
1441 {
1442         DerivedMesh *final;
1443         
1444         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 1, 1, 0, dataMask, -1, 0);
1445
1446         return final;
1447 }
1448
1449 DerivedMesh *mesh_create_derived_index_render(Scene *scene, Object *ob, CustomDataMask dataMask, int index)
1450 {
1451         DerivedMesh *final;
1452         
1453         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 1, 1, 0, dataMask, index, 0);
1454
1455         return final;
1456 }
1457
1458 DerivedMesh *mesh_create_derived_view(Scene *scene, Object *ob, CustomDataMask dataMask)
1459 {
1460         DerivedMesh *final;
1461
1462         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 0, 1, 0, dataMask, -1, 0);
1463
1464         return final;
1465 }
1466
1467 DerivedMesh *mesh_create_derived_no_deform(Scene *scene, Object *ob, float (*vertCos)[3],
1468                                                                                    CustomDataMask dataMask)
1469 {
1470         DerivedMesh *final;
1471         
1472         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, 0, 0, dataMask, -1, 0);
1473
1474         return final;
1475 }
1476
1477 DerivedMesh *mesh_create_derived_no_virtual(Scene *scene, Object *ob, float (*vertCos)[3],
1478                                                                                         CustomDataMask dataMask)
1479 {
1480         DerivedMesh *final;
1481         
1482         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, -1, 0, dataMask, -1, 0);
1483
1484         return final;
1485 }
1486
1487 DerivedMesh *mesh_create_derived_physics(Scene *scene, Object *ob, float (*vertCos)[3],
1488                                                                                         CustomDataMask dataMask)
1489 {
1490         DerivedMesh *final;
1491         
1492         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, -1, 1, dataMask, -1, 0);
1493
1494         return final;
1495 }
1496
1497 DerivedMesh *mesh_create_derived_no_deform_render(Scene *scene, Object *ob,
1498                                                                                                   float (*vertCos)[3],
1499                                                                                                   CustomDataMask dataMask)
1500 {
1501         DerivedMesh *final;
1502
1503         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 1, 0, 0, dataMask, -1, 0);
1504
1505         return final;
1506 }
1507
1508 /***/
1509
1510 DerivedMesh *editmesh_get_derived_cage_and_final(Scene *scene, Object *obedit, EditMesh *em, DerivedMesh **final_r,
1511                                                                                                  CustomDataMask dataMask)
1512 {
1513         /* if there's no derived mesh or the last data mask used doesn't include
1514          * the data we need, rebuild the derived mesh
1515          */
1516         if(!em->derivedCage ||
1517            (em->lastDataMask & dataMask) != dataMask)
1518                 editmesh_build_data(scene, obedit, em, dataMask);
1519
1520         *final_r = em->derivedFinal;
1521         return em->derivedCage;
1522 }
1523
1524 DerivedMesh *editmesh_get_derived_cage(Scene *scene, Object *obedit, EditMesh *em, CustomDataMask dataMask)
1525 {
1526         /* if there's no derived mesh or the last data mask used doesn't include
1527          * the data we need, rebuild the derived mesh
1528          */
1529         if(!em->derivedCage ||
1530            (em->lastDataMask & dataMask) != dataMask)
1531                 editmesh_build_data(scene, obedit, em, dataMask);
1532
1533         return em->derivedCage;
1534 }
1535
1536 DerivedMesh *editmesh_get_derived_base(Object *UNUSED(obedit), EditMesh *em)
1537 {
1538         return editmesh_get_derived(em, NULL);
1539 }
1540
1541
1542 /* ********* For those who don't grasp derived stuff! (ton) :) *************** */
1543
1544 static void make_vertexcosnos__mapFunc(void *userData, int index, float *co, float *no_f, short *no_s)
1545 {
1546         float *vec = userData;
1547         
1548         vec+= 6*index;
1549
1550         /* check if we've been here before (normal should not be 0) */
1551         if(vec[3] || vec[4] || vec[5]) return;
1552
1553         copy_v3_v3(vec, co);
1554         vec+= 3;
1555         if(no_f) {
1556                 copy_v3_v3(vec, no_f);
1557         }
1558         else {
1559                 normal_short_to_float_v3(vec, no_s);
1560         }
1561 }
1562
1563 /* always returns original amount me->totvert of vertices and normals, but fully deformed and subsurfered */
1564 /* this is needed for all code using vertexgroups (no subsurf support) */
1565 /* it stores the normals as floats, but they can still be scaled as shorts (32767 = unit) */
1566 /* in use now by vertex/weight paint and particle generating */
1567
1568 float *mesh_get_mapped_verts_nors(Scene *scene, Object *ob)
1569 {
1570         Mesh *me= ob->data;
1571         DerivedMesh *dm;
1572         float *vertexcosnos;
1573         
1574         /* lets prevent crashing... */
1575         if(ob->type!=OB_MESH || me->totvert==0)
1576                 return NULL;
1577         
1578         dm= mesh_get_derived_final(scene, ob, CD_MASK_BAREMESH);
1579         vertexcosnos= MEM_callocN(6*sizeof(float)*me->totvert, "vertexcosnos map");
1580         
1581         if(dm->foreachMappedVert) {
1582                 dm->foreachMappedVert(dm, make_vertexcosnos__mapFunc, vertexcosnos);
1583         }
1584         else {
1585                 float *fp= vertexcosnos;
1586                 int a;
1587                 
1588                 for(a=0; a< me->totvert; a++, fp+=6) {
1589                         dm->getVertCo(dm, a, fp);
1590                         dm->getVertNo(dm, a, fp+3);
1591                 }
1592         }
1593         
1594         dm->release(dm);
1595         return vertexcosnos;
1596 }
1597
1598 /* ******************* GLSL ******************** */
1599
1600 typedef struct
1601 {
1602         float * precomputedFaceNormals;
1603         MTFace * mtface;        // texture coordinates
1604         MFace * mface;          // indices
1605         MVert * mvert;          // vertices & normals
1606         float (*orco)[3];
1607         float (*tangent)[4];    // destination
1608         int numFaces;
1609
1610 } SGLSLMeshToTangent;
1611
1612 // interface
1613 #include "mikktspace.h"
1614
1615 static int GetNumFaces(const SMikkTSpaceContext * pContext)
1616 {
1617         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
1618         return pMesh->numFaces;
1619 }
1620
1621 static int GetNumVertsOfFace(const SMikkTSpaceContext * pContext, const int face_num)
1622 {
1623         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
1624         return pMesh->mface[face_num].v4!=0 ? 4 : 3;
1625 }
1626
1627 static void GetPosition(const SMikkTSpaceContext * pContext, float fPos[], const int face_num, const int vert_index)
1628 {
1629         //assert(vert_index>=0 && vert_index<4);
1630         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
1631         const float *co= pMesh->mvert[(&pMesh->mface[face_num].v1)[vert_index]].co;
1632         copy_v3_v3(fPos, co);
1633 }
1634
1635 static void GetTextureCoordinate(const SMikkTSpaceContext * pContext, float fUV[], const int face_num, const int vert_index)
1636 {
1637         //assert(vert_index>=0 && vert_index<4);
1638         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
1639
1640         if(pMesh->mtface!=NULL) {
1641                 float * uv = pMesh->mtface[face_num].uv[vert_index];
1642                 fUV[0]=uv[0]; fUV[1]=uv[1];
1643         }
1644         else {
1645                 const float *orco= pMesh->orco[(&pMesh->mface[face_num].v1)[vert_index]];
1646                 map_to_sphere( &fUV[0], &fUV[1], orco[0], orco[1], orco[2]);
1647         }
1648 }
1649
1650 static void GetNormal(const SMikkTSpaceContext * pContext, float fNorm[], const int face_num, const int vert_index)
1651 {
1652         //assert(vert_index>=0 && vert_index<4);
1653         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
1654
1655         const int smoothnormal = (pMesh->mface[face_num].flag & ME_SMOOTH);
1656         if(!smoothnormal) {     // flat
1657                 if(pMesh->precomputedFaceNormals) {
1658                         copy_v3_v3(fNorm, &pMesh->precomputedFaceNormals[3*face_num]);
1659                 }
1660                 else {
1661                         MFace *mf= &pMesh->mface[face_num];
1662                         float *p0= pMesh->mvert[mf->v1].co;
1663                         float *p1= pMesh->mvert[mf->v2].co;
1664                         float *p2= pMesh->mvert[mf->v3].co;
1665
1666                         if(mf->v4) {
1667                                 float *p3 = pMesh->mvert[mf->v4].co;
1668                                 normal_quad_v3(fNorm, p0, p1, p2, p3);
1669                         }
1670                         else {
1671                                 normal_tri_v3(fNorm, p0, p1, p2);
1672                         }
1673                 }
1674         }
1675         else {
1676                 const short *no= pMesh->mvert[(&pMesh->mface[face_num].v1)[vert_index]].no;
1677                 normal_short_to_float_v3(fNorm, no);
1678         }
1679 }
1680 static void SetTSpace(const SMikkTSpaceContext * pContext, const float fvTangent[], const float fSign, const int face_num, const int iVert)
1681 {
1682         //assert(vert_index>=0 && vert_index<4);
1683         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
1684         float * pRes = pMesh->tangent[4*face_num+iVert];
1685         copy_v3_v3(pRes, fvTangent);
1686         pRes[3]=fSign;
1687 }
1688
1689
1690 void DM_add_tangent_layer(DerivedMesh *dm)
1691 {
1692         /* mesh vars */
1693         MTFace *mtface, *tf;
1694         MFace *mface, *mf;
1695         MVert *mvert, *v1, *v2, *v3, *v4;
1696         MemArena *arena= NULL;
1697         VertexTangent **vtangents= NULL;
1698         float (*orco)[3]= NULL, (*tangent)[4];
1699         float *uv1, *uv2, *uv3, *uv4, *vtang;
1700         float fno[3], tang[3], uv[4][2];
1701         int i, j, len, mf_vi[4], totvert, totface, iCalcNewMethod;
1702         float *nors;
1703
1704         if(CustomData_get_layer_index(&dm->faceData, CD_TANGENT) != -1)
1705                 return;
1706
1707         nors = dm->getFaceDataArray(dm, CD_NORMAL);
1708
1709         /* check we have all the needed layers */
1710         totvert= dm->getNumVerts(dm);
1711         totface= dm->getNumFaces(dm);
1712
1713         mvert= dm->getVertArray(dm);
1714         mface= dm->getFaceArray(dm);
1715         mtface= dm->getFaceDataArray(dm, CD_MTFACE);
1716
1717         if(!mtface) {
1718                 orco= dm->getVertDataArray(dm, CD_ORCO);
1719                 if(!orco)
1720                         return;
1721         }
1722         
1723         /* create tangent layer */
1724         DM_add_face_layer(dm, CD_TANGENT, CD_CALLOC, NULL);
1725         tangent= DM_get_face_data_layer(dm, CD_TANGENT);
1726         
1727         /* allocate some space */
1728         arena= BLI_memarena_new(BLI_MEMARENA_STD_BUFSIZE, "tangent layer arena");
1729         BLI_memarena_use_calloc(arena);
1730         vtangents= MEM_callocN(sizeof(VertexTangent*)*totvert, "VertexTangent");
1731
1732         // new computation method
1733         iCalcNewMethod = 1;
1734         if(iCalcNewMethod != 0) {
1735                 SGLSLMeshToTangent mesh2tangent= {0};
1736                 SMikkTSpaceContext sContext= {0};
1737                 SMikkTSpaceInterface sInterface= {0};
1738
1739                 mesh2tangent.precomputedFaceNormals = nors;
1740                 mesh2tangent.mtface = mtface;
1741                 mesh2tangent.mface = mface;
1742                 mesh2tangent.mvert = mvert;
1743                 mesh2tangent.orco = orco;
1744                 mesh2tangent.tangent = tangent;
1745                 mesh2tangent.numFaces = totface;
1746
1747                 sContext.m_pUserData = &mesh2tangent;
1748                 sContext.m_pInterface = &sInterface;
1749                 sInterface.m_getNumFaces = GetNumFaces;
1750                 sInterface.m_getNumVerticesOfFace = GetNumVertsOfFace;
1751                 sInterface.m_getPosition = GetPosition;
1752                 sInterface.m_getTexCoord = GetTextureCoordinate;
1753                 sInterface.m_getNormal = GetNormal;
1754                 sInterface.m_setTSpaceBasic = SetTSpace;
1755
1756                 // 0 if failed
1757                 iCalcNewMethod = genTangSpaceDefault(&sContext);
1758         }
1759
1760         if(!iCalcNewMethod) {
1761                 /* sum tangents at connected vertices */
1762                 for(i=0, tf=mtface, mf=mface; i < totface; mf++, tf++, i++) {
1763                         v1= &mvert[mf->v1];
1764                         v2= &mvert[mf->v2];
1765                         v3= &mvert[mf->v3];
1766
1767                         if (mf->v4) {
1768                                 v4= &mvert[mf->v4];
1769                                 normal_quad_v3( fno,v4->co, v3->co, v2->co, v1->co);
1770                         }
1771                         else {
1772                                 v4= NULL;
1773                                 normal_tri_v3( fno,v3->co, v2->co, v1->co);
1774                         }
1775                 
1776                         if(mtface) {
1777                                 uv1= tf->uv[0];
1778                                 uv2= tf->uv[1];
1779                                 uv3= tf->uv[2];
1780                                 uv4= tf->uv[3];
1781                         }
1782                         else {
1783                                 uv1= uv[0]; uv2= uv[1]; uv3= uv[2]; uv4= uv[3];
1784                                 map_to_sphere( &uv[0][0], &uv[0][1],orco[mf->v1][0], orco[mf->v1][1], orco[mf->v1][2]);
1785                                 map_to_sphere( &uv[1][0], &uv[1][1],orco[mf->v2][0], orco[mf->v2][1], orco[mf->v2][2]);
1786                                 map_to_sphere( &uv[2][0], &uv[2][1],orco[mf->v3][0], orco[mf->v3][1], orco[mf->v3][2]);
1787                                 if(v4)
1788                                         map_to_sphere( &uv[3][0], &uv[3][1],orco[mf->v4][0], orco[mf->v4][1], orco[mf->v4][2]);
1789                         }
1790                 
1791                         tangent_from_uv(uv1, uv2, uv3, v1->co, v2->co, v3->co, fno, tang);
1792                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v1], tang, uv1);
1793                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v2], tang, uv2);
1794                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v3], tang, uv3);
1795                 
1796                         if(mf->v4) {
1797                                 v4= &mvert[mf->v4];
1798                         
1799                                 tangent_from_uv(uv1, uv3, uv4, v1->co, v3->co, v4->co, fno, tang);
1800                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v1], tang, uv1);
1801                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v3], tang, uv3);
1802                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v4], tang, uv4);
1803                         }
1804                 }
1805         
1806                 /* write tangent to layer */
1807                 for(i=0, tf=mtface, mf=mface; i < totface; mf++, tf++, i++, tangent+=4) {
1808                         len= (mf->v4)? 4 : 3; 
1809
1810                         if(mtface == NULL) {
1811                                 map_to_sphere( &uv[0][0], &uv[0][1],orco[mf->v1][0], orco[mf->v1][1], orco[mf->v1][2]);
1812                                 map_to_sphere( &uv[1][0], &uv[1][1],orco[mf->v2][0], orco[mf->v2][1], orco[mf->v2][2]);
1813                                 map_to_sphere( &uv[2][0], &uv[2][1],orco[mf->v3][0], orco[mf->v3][1], orco[mf->v3][2]);
1814                                 if(len==4)
1815                                         map_to_sphere( &uv[3][0], &uv[3][1],orco[mf->v4][0], orco[mf->v4][1], orco[mf->v4][2]);
1816                         }
1817                 
1818                         mf_vi[0]= mf->v1;
1819                         mf_vi[1]= mf->v2;
1820                         mf_vi[2]= mf->v3;
1821                         mf_vi[3]= mf->v4;
1822                 
1823                         for(j=0; j<len; j++) {
1824                                 vtang= find_vertex_tangent(vtangents[mf_vi[j]], mtface ? tf->uv[j] : uv[j]);
1825                                 normalize_v3_v3(tangent[j], vtang);
1826                                 ((float *) tangent[j])[3]=1.0f;
1827                         }
1828                 }
1829         }
1830         
1831         BLI_memarena_free(arena);
1832         MEM_freeN(vtangents);
1833 }
1834
1835 void DM_calc_auto_bump_scale(DerivedMesh *dm)
1836 {
1837         /* int totvert= dm->getNumVerts(dm); */ /* UNUSED */
1838         int totface= dm->getNumFaces(dm);
1839
1840         MVert * mvert = dm->getVertArray(dm);
1841         MFace * mface = dm->getFaceArray(dm);
1842         MTFace * mtface = dm->getFaceDataArray(dm, CD_MTFACE);
1843
1844         if(mtface)
1845         {
1846                 double dsum = 0.0;
1847                 int nr_accumulated = 0;
1848                 int f;
1849
1850                 for ( f=0; f<totface; f++ )
1851                 {
1852                         {
1853                                 float * verts[4], * tex_coords[4];
1854                                 const int nr_verts = mface[f].v4!=0 ? 4 : 3;
1855                                 int i, is_degenerate;
1856
1857                                 verts[0]=mvert[mface[f].v1].co; verts[1]=mvert[mface[f].v2].co; verts[2]=mvert[mface[f].v3].co;
1858                                 tex_coords[0]=mtface[f].uv[0]; tex_coords[1]=mtface[f].uv[1]; tex_coords[2]=mtface[f].uv[2];
1859                                 if(nr_verts==4)
1860                                 {
1861                                         verts[3]=mvert[mface[f].v4].co;
1862                                         tex_coords[3]=mtface[f].uv[3];
1863                                 }
1864
1865                                 // discard degenerate faces
1866                                 is_degenerate = 0;
1867                                 if(     equals_v3v3(verts[0], verts[1]) || equals_v3v3(verts[0], verts[2]) || equals_v3v3(verts[1], verts[2]) ||
1868                                         equals_v2v2(tex_coords[0], tex_coords[1]) || equals_v2v2(tex_coords[0], tex_coords[2]) || equals_v2v2(tex_coords[1], tex_coords[2]) )
1869                                 {
1870                                         is_degenerate = 1;
1871                                 }
1872
1873                                 // verify last vertex as well if this is a quad
1874                                 if ( is_degenerate==0 && nr_verts==4 )
1875                                 {
1876                                         if(     equals_v3v3(verts[3], verts[0]) || equals_v3v3(verts[3], verts[1]) || equals_v3v3(verts[3], verts[2]) ||
1877                                                 equals_v2v2(tex_coords[3], tex_coords[0]) || equals_v2v2(tex_coords[3], tex_coords[1]) || equals_v2v2(tex_coords[3], tex_coords[2]) )
1878                                         {
1879                                                 is_degenerate = 1;
1880                                         }
1881
1882                                         // verify the winding is consistent
1883                                         if ( is_degenerate==0 )
1884                                         {
1885                                                 float prev_edge[2];
1886                                                 int is_signed = 0;
1887                                                 sub_v2_v2v2(prev_edge, tex_coords[0], tex_coords[3]);
1888
1889                                                 i = 0;
1890                                                 while ( is_degenerate==0 && i<4 )
1891                                                 {
1892                                                         float cur_edge[2], signed_area;
1893                                                         sub_v2_v2v2(cur_edge, tex_coords[(i+1)&0x3], tex_coords[i]);
1894                                                         signed_area = prev_edge[0]*cur_edge[1] - prev_edge[1]*cur_edge[0];
1895                                                         if ( i==0 ) is_signed = signed_area<0.0f ? 1 : 0;
1896                                                         else if((is_signed!=0)!=(signed_area<0.0f)) is_degenerate=1;
1897
1898                                                         if ( is_degenerate==0 )
1899                                                         {
1900                                                                 copy_v2_v2(prev_edge, cur_edge);
1901                                                                 ++i;
1902                                                         }
1903                                                 }
1904                                         }
1905                                 }
1906
1907                                 // proceed if not a degenerate face
1908                                 if ( is_degenerate==0 )
1909                                 {
1910                                         int nr_tris_to_pile=0;
1911                                         // quads split at shortest diagonal
1912                                         int offs = 0;           // initial triangulation is 0,1,2 and 0, 2, 3
1913                                         if ( nr_verts==4 )
1914                                         {
1915                                                 float pos_len_diag0, pos_len_diag1;
1916                                                 float vtmp[3];
1917                                                 sub_v3_v3v3(vtmp, verts[2], verts[0]);
1918                                                 pos_len_diag0 = dot_v3v3(vtmp, vtmp);
1919                                                 sub_v3_v3v3(vtmp, verts[3], verts[1]);
1920                                                 pos_len_diag1 = dot_v3v3(vtmp, vtmp);
1921
1922                                                 if(pos_len_diag1<pos_len_diag0)
1923                                                         offs=1;         // alter split
1924                                                 else if(pos_len_diag0==pos_len_diag1)           // do UV check instead
1925                                                 {
1926                                                         float tex_len_diag0, tex_len_diag1;
1927
1928                                                         sub_v2_v2v2(vtmp, tex_coords[2], tex_coords[0]);
1929                                                         tex_len_diag0 = dot_v2v2(vtmp, vtmp);
1930                                                         sub_v2_v2v2(vtmp, tex_coords[3], tex_coords[1]);
1931                                                         tex_len_diag1 = dot_v2v2(vtmp, vtmp);
1932
1933                                                         if(tex_len_diag1<tex_len_diag0)
1934                                                         {
1935                                                                 offs=1;         // alter split
1936                                                         }
1937                                                 }
1938                                         }
1939                                         nr_tris_to_pile = nr_verts-2 ;
1940                                         if ( nr_tris_to_pile==1 || nr_tris_to_pile==2 )
1941                                         {
1942                                                 const int indices[] = {offs+0, offs+1, offs+2, offs+0, offs+2, (offs+3)&0x3 };
1943                                                 int t;
1944                                                 for ( t=0; t<nr_tris_to_pile; t++ )
1945                                                 {
1946                                                         float f2x_area_uv;
1947                                                         float * p0 = verts[indices[t*3+0]];
1948                                                         float * p1 = verts[indices[t*3+1]];
1949                                                         float * p2 = verts[indices[t*3+2]];
1950
1951                                                         float edge_t0[2], edge_t1[2];
1952                                                         sub_v2_v2v2(edge_t0, tex_coords[indices[t*3+1]], tex_coords[indices[t*3+0]]);
1953                                                         sub_v2_v2v2(edge_t1, tex_coords[indices[t*3+2]], tex_coords[indices[t*3+0]]);
1954
1955                                                         f2x_area_uv = fabsf(edge_t0[0]*edge_t1[1] - edge_t0[1]*edge_t1[0]);
1956                                                         if ( f2x_area_uv>FLT_EPSILON )
1957                                                         {
1958                                                                 float norm[3], v0[3], v1[3], f2x_surf_area, fsurf_ratio;
1959                                                                 sub_v3_v3v3(v0, p1, p0);
1960                                                                 sub_v3_v3v3(v1, p2, p0);
1961                                                                 cross_v3_v3v3(norm, v0, v1);
1962
1963                                                                 f2x_surf_area = len_v3(norm);
1964                                                                 fsurf_ratio = f2x_surf_area/f2x_area_uv;        // tri area divided by texture area
1965
1966                                                                 ++nr_accumulated;
1967                                                                 dsum += (double)(fsurf_ratio);
1968                                                         }
1969                                                 }
1970                                         }
1971                                 }
1972                         }
1973                 }
1974
1975                 // finalize
1976                 {
1977                         const float avg_area_ratio = (nr_accumulated>0) ? ((float)(dsum / nr_accumulated)) : 1.0f;
1978                         const float use_as_render_bump_scale = sqrtf(avg_area_ratio);           // use width of average surface ratio as your bump scale
1979                         dm->auto_bump_scale = use_as_render_bump_scale;
1980                 }
1981         }
1982         else
1983         {
1984                 dm->auto_bump_scale = 1.0f;
1985         }
1986 }
1987
1988 void DM_vertex_attributes_from_gpu(DerivedMesh *dm, GPUVertexAttribs *gattribs, DMVertexAttribs *attribs)
1989 {
1990         CustomData *vdata, *fdata, *tfdata = NULL;
1991         int a, b, layer;
1992
1993         /* From the layers requested by the GLSL shader, figure out which ones are
1994          * actually available for this derivedmesh, and retrieve the pointers */
1995
1996         memset(attribs, 0, sizeof(DMVertexAttribs));
1997
1998         vdata = &dm->vertData;
1999         fdata = &dm->faceData;
2000
2001         /* ugly hack, editmesh derivedmesh doesn't copy face data, this way we
2002          * can use offsets instead */
2003         if(dm->type == DM_TYPE_EDITMESH)
2004                 tfdata = &((EditMeshDerivedMesh*)dm)->em->fdata;
2005         else
2006                 tfdata = fdata;
2007
2008         /* calc auto bump scale if necessary */
2009 #if 0
2010         if(dm->auto_bump_scale<=0.0f)
2011                 DM_calc_auto_bump_scale(dm);
2012 #else
2013         dm->auto_bump_scale = 1.0f; // will revert this after release
2014 #endif
2015
2016
2017         /* add a tangent layer if necessary */
2018         for(b = 0; b < gattribs->totlayer; b++)
2019                 if(gattribs->layer[b].type == CD_TANGENT)
2020                         if(CustomData_get_layer_index(fdata, CD_TANGENT) == -1)
2021                                 DM_add_tangent_layer(dm);
2022
2023         for(b = 0; b < gattribs->totlayer; b++) {
2024                 if(gattribs->layer[b].type == CD_MTFACE) {
2025                         /* uv coordinates */
2026                         if(gattribs->layer[b].name[0])
2027                                 layer = CustomData_get_named_layer_index(tfdata, CD_MTFACE,
2028                                         gattribs->layer[b].name);
2029                         else
2030                                 layer = CustomData_get_active_layer_index(tfdata, CD_MTFACE);
2031
2032                         if(layer != -1) {
2033                                 a = attribs->tottface++;
2034
2035                                 attribs->tface[a].array = tfdata->layers[layer].data;
2036                                 attribs->tface[a].emOffset = tfdata->layers[layer].offset;
2037                                 attribs->tface[a].glIndex = gattribs->layer[b].glindex;
2038                                 attribs->tface[a].glTexco = gattribs->layer[b].gltexco;
2039                         }
2040                 }
2041                 else if(gattribs->layer[b].type == CD_MCOL) {
2042                         /* vertex colors */
2043                         if(gattribs->layer[b].name[0])
2044                                 layer = CustomData_get_named_layer_index(tfdata, CD_MCOL,
2045                                         gattribs->layer[b].name);
2046                         else
2047                                 layer = CustomData_get_active_layer_index(tfdata, CD_MCOL);
2048
2049                         if(layer != -1) {
2050                                 a = attribs->totmcol++;
2051
2052                                 attribs->mcol[a].array = tfdata->layers[layer].data;
2053                                 attribs->mcol[a].emOffset = tfdata->layers[layer].offset;
2054                                 attribs->mcol[a].glIndex = gattribs->layer[b].glindex;
2055                         }
2056                 }
2057                 else if(gattribs->layer[b].type == CD_TANGENT) {
2058                         /* tangents */
2059                         layer = CustomData_get_layer_index(fdata, CD_TANGENT);
2060
2061                         if(layer != -1) {
2062                                 attribs->tottang = 1;
2063
2064                                 attribs->tang.array = fdata->layers[layer].data;
2065                                 attribs->tang.emOffset = fdata->layers[layer].offset;
2066                                 attribs->tang.glIndex = gattribs->layer[b].glindex;
2067                         }
2068                 }
2069                 else if(gattribs->layer[b].type == CD_ORCO) {
2070                         /* original coordinates */
2071                         layer = CustomData_get_layer_index(vdata, CD_ORCO);
2072
2073                         if(layer != -1) {
2074                                 attribs->totorco = 1;
2075
2076                                 attribs->orco.array = vdata->layers[layer].data;
2077                                 attribs->orco.emOffset = vdata->layers[layer].offset;
2078                                 attribs->orco.glIndex = gattribs->layer[b].glindex;
2079                                 attribs->orco.glTexco = gattribs->layer[b].gltexco;
2080                         }
2081                 }
2082         }
2083 }
2084
2085 /* Set object's bounding box based on DerivedMesh min/max data */
2086 void DM_set_object_boundbox(Object *ob, DerivedMesh *dm)
2087 {
2088         float min[3], max[3];
2089
2090         INIT_MINMAX(min, max);
2091
2092         dm->getMinMax(dm, min, max);
2093
2094         if(!ob->bb)
2095                 ob->bb= MEM_callocN(sizeof(BoundBox), "DM-BoundBox");
2096
2097         boundbox_set_from_min_max(ob->bb, min, max);
2098 }
2099
2100 /* --- NAVMESH (begin) --- */
2101 #ifdef WITH_GAMEENGINE
2102
2103 BM_INLINE int navmesh_bit(int a, int b)
2104 {
2105         return (a & (1 << b)) >> b;
2106 }
2107
2108 BM_INLINE void navmesh_intToCol(int i, float col[3])
2109 {
2110         int     r = navmesh_bit(i, 0) + navmesh_bit(i, 3) * 2 + 1;
2111         int     g = navmesh_bit(i, 1) + navmesh_bit(i, 4) * 2 + 1;
2112         int     b = navmesh_bit(i, 2) + navmesh_bit(i, 5) * 2 + 1;
2113         col[0] = 1 - r*63.0f/255.0f;
2114         col[1] = 1 - g*63.0f/255.0f;
2115         col[2] = 1 - b*63.0f/255.0f;
2116 }
2117
2118 static void navmesh_drawColored(DerivedMesh *dm)
2119 {
2120         int a, glmode;
2121         MVert *mvert = (MVert *)CustomData_get_layer(&dm->vertData, CD_MVERT);
2122         MFace *mface = (MFace *)CustomData_get_layer(&dm->faceData, CD_MFACE);
2123         int *polygonIdx = (int *)CustomData_get_layer(&dm->faceData, CD_RECAST);
2124         float col[3];
2125
2126         if (!polygonIdx)
2127                 return;
2128
2129         /*
2130         //UI_ThemeColor(TH_WIRE);
2131         glDisable(GL_LIGHTING);
2132         glLineWidth(2.0);
2133         dm->drawEdges(dm, 0, 1);
2134         glLineWidth(1.0);
2135         glEnable(GL_LIGHTING);*/
2136
2137         glDisable(GL_LIGHTING);
2138         /*  if(GPU_buffer_legacy(dm) ) */ { /* TODO - VBO draw code, not high priority - campbell */
2139                 DEBUG_VBO( "Using legacy code. drawNavMeshColored\n" );
2140                 //glShadeModel(GL_SMOOTH);
2141                 glBegin(glmode = GL_QUADS);
2142                 for(a = 0; a < dm->numFaceData; a++, mface++) {
2143                         int new_glmode = mface->v4?GL_QUADS:GL_TRIANGLES;
2144                         int pi = polygonIdx[a];
2145                         if (pi <= 0) {
2146                                 zero_v3(col);
2147                         }
2148                         else {
2149                                 navmesh_intToCol(pi, col);
2150                         }
2151
2152                         if(new_glmode != glmode) {
2153                                 glEnd();
2154                                 glBegin(glmode = new_glmode);
2155                         }
2156                         glColor3fv(col);
2157                         glVertex3fv(mvert[mface->v1].co);
2158                         glVertex3fv(mvert[mface->v2].co);
2159                         glVertex3fv(mvert[mface->v3].co);
2160                         if(mface->v4) {
2161                                 glVertex3fv(mvert[mface->v4].co);
2162                         }
2163                 }
2164                 glEnd();
2165         }
2166         glEnable(GL_LIGHTING);
2167 }
2168
2169 static void navmesh_DM_drawFacesTex(DerivedMesh *dm,
2170                         int (*setDrawOptions)(MTFace *tface, int has_mcol, int matnr),
2171                         int (*compareDrawOptions)(void *userData, int cur_index, int next_index),
2172                         void *userData)
2173 {
2174         (void) setDrawOptions;
2175         (void) compareDrawOptions;
2176         (void) userData;
2177
2178         navmesh_drawColored(dm);
2179 }
2180
2181 static void navmesh_DM_drawFacesSolid(DerivedMesh *dm,
2182                                       float (*partial_redraw_planes)[4],
2183                                       int UNUSED(fast), int (*setMaterial)(int, void *attribs))
2184 {
2185         (void) partial_redraw_planes;
2186         (void) setMaterial;
2187
2188         //drawFacesSolid_original(dm, partial_redraw_planes, fast, setMaterial);
2189         navmesh_drawColored(dm);
2190 }
2191
2192 static DerivedMesh *navmesh_dm_createNavMeshForVisualization(DerivedMesh *dm)
2193 {
2194         DerivedMesh *result;
2195         int maxFaces = dm->getNumFaces(dm);
2196         int *recastData;
2197         int vertsPerPoly=0, nverts=0, ndtris=0, npolys=0;
2198         float* verts=NULL;
2199         unsigned short *dtris=NULL, *dmeshes=NULL, *polys=NULL;
2200         int *dtrisToPolysMap=NULL, *dtrisToTrisMap=NULL, *trisToFacesMap=NULL;
2201         int res;
2202
2203         result = CDDM_copy(dm);
2204         if (!CustomData_has_layer(&result->faceData, CD_RECAST)) {
2205                 int *sourceRecastData = (int*)CustomData_get_layer(&dm->faceData, CD_RECAST);
2206                 if (sourceRecastData) {
2207                         CustomData_add_layer_named(&result->faceData, CD_RECAST, CD_DUPLICATE,
2208                                                    sourceRecastData, maxFaces, "recastData");
2209                 }
2210         }
2211         recastData = (int*)CustomData_get_layer(&result->faceData, CD_RECAST);
2212
2213         /* note: This is not good design! - really should not be doing this */
2214         result->drawFacesTex =  navmesh_DM_drawFacesTex;
2215         result->drawFacesSolid = navmesh_DM_drawFacesSolid;
2216
2217
2218         /* process mesh */
2219         res  = buildNavMeshDataByDerivedMesh(dm, &vertsPerPoly, &nverts, &verts, &ndtris, &dtris,
2220                                              &npolys, &dmeshes, &polys, &dtrisToPolysMap, &dtrisToTrisMap,
2221                                              &trisToFacesMap);
2222         if (res) {
2223                 size_t polyIdx;
2224
2225                 /* invalidate concave polygon */
2226                 for (polyIdx=0; polyIdx<(size_t)npolys; polyIdx++) {
2227                         unsigned short* poly = &polys[polyIdx*2*vertsPerPoly];
2228                         if (!polyIsConvex(poly, vertsPerPoly, verts)) {
2229                                 /* set negative polygon idx to all faces */
2230                                 unsigned short *dmesh = &dmeshes[4*polyIdx];
2231                                 unsigned short tbase = dmesh[2];
2232                                 unsigned short tnum = dmesh[3];
2233                                 unsigned short ti;
2234
2235                                 for (ti=0; ti<tnum; ti++) {
2236                                         unsigned short triidx = dtrisToTrisMap[tbase+ti];
2237                                         unsigned short faceidx = trisToFacesMap[triidx];
2238                                         if (recastData[faceidx] > 0) {
2239                                                 recastData[faceidx] = -recastData[faceidx];
2240                                         }
2241                                 }
2242                         }
2243                 }
2244         }
2245         else {
2246                 printf("Error during creation polygon infos\n");
2247         }
2248
2249         /* clean up */
2250         if (verts!=NULL)
2251                 MEM_freeN(verts);
2252         if (dtris!=NULL)
2253                 MEM_freeN(dtris);
2254         if (dmeshes!=NULL)
2255                 MEM_freeN(dmeshes);
2256         if (polys!=NULL)
2257                 MEM_freeN(polys);
2258         if (dtrisToPolysMap!=NULL)
2259                 MEM_freeN(dtrisToPolysMap);
2260         if (dtrisToTrisMap!=NULL)
2261                 MEM_freeN(dtrisToTrisMap);
2262         if (trisToFacesMap!=NULL)
2263                 MEM_freeN(trisToFacesMap);
2264
2265         return result;
2266 }
2267
2268 #endif /* WITH_GAMEENGINE */
2269
2270 /* --- NAVMESH (end) --- */