Merging r42648 through r42722 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 void weightpaint_color(unsigned char r_col[4], ColorBand *coba, const float input)
646 {
647         float colf[4];
648
649         if(coba) do_colorband(coba, input, colf);
650         else     weight_to_rgb(colf, input);
651
652         r_col[3] = (unsigned char)(colf[0] * 255.0f);
653         r_col[2] = (unsigned char)(colf[1] * 255.0f);
654         r_col[1] = (unsigned char)(colf[2] * 255.0f);
655         r_col[0] = 255;
656 }
657
658
659 static void calc_weightpaint_vert_color(
660         unsigned char r_col[4],
661         MDeformVert *dv, ColorBand *coba,
662         const int defbase_tot, const int defbase_act,
663         const char *dg_flags,
664         const int selected, const int draw_flag)
665 {
666         float input = 0.0f;
667         
668         int make_black= FALSE;
669
670         if ((selected > 1) && (draw_flag & CALC_WP_MULTIPAINT)) {
671                 int was_a_nonzero= FALSE;
672                 int i;
673
674                 MDeformWeight *dw= dv->dw;
675                 for (i = dv->totweight; i > 0; i--, dw++) {
676                         /* in multipaint, get the average if auto normalize is inactive
677                          * get the sum if it is active */
678                         if (dw->def_nr < defbase_tot) {
679                                 if (dg_flags[dw->def_nr]) {
680                                         if (dw->weight) {
681                                                 input += dw->weight;
682                                                 was_a_nonzero= TRUE;
683                                         }
684                                 }
685                         }
686                 }
687
688                 /* make it black if the selected groups have no weight on a vertex */
689                 if (was_a_nonzero == FALSE) {
690                         make_black = TRUE;
691                 }
692                 else if ((draw_flag & CALC_WP_AUTO_NORMALIZE) == FALSE) {
693                         input /= selected; /* get the average */
694                 }
695         }
696         else {
697                 /* default, non tricky behavior */
698                 input= defvert_find_weight(dv, defbase_act);
699         }
700
701         if (make_black) { /* TODO, theme color */
702                 r_col[3] = 0;
703                 r_col[2] = 0;
704                 r_col[1] = 0;
705                 r_col[0] = 255;
706         }
707         else {
708                 CLAMP(input, 0.0f, 1.0f);
709                 weightpaint_color(r_col, coba, input);
710         }
711 }
712
713 static ColorBand *stored_cb= NULL;
714
715 void vDM_ColorBand_store(ColorBand *coba)
716 {
717         stored_cb= coba;
718 }
719
720 static void add_weight_mcol_dm(Object *ob, DerivedMesh *dm, int const draw_flag)
721 {
722         Mesh *me = ob->data;
723         ColorBand *coba= stored_cb;     /* warning, not a local var */
724
725         unsigned char *wtcol = MEM_mallocN (sizeof (unsigned char) * me->totface*4*4, "weightmap");
726
727         if (me->dvert) {
728                 MDeformVert *dvert= me->dvert;
729                 MFace *mf = me->mface;
730
731                 const int defbase_tot = BLI_countlist(&ob->defbase);
732                 const int defbase_act = ob->actdef-1;
733                 char *dg_flags = MEM_mallocN(defbase_tot * sizeof(char), __func__);
734                 const int selected = get_selected_defgroups(ob, dg_flags, defbase_tot);
735                 /* const int unselected = defbase_tot - selected; */ /* UNUSED */
736
737                 int i;
738
739                 memset(wtcol, 0x55, sizeof (unsigned char) * me->totface*4*4);
740                 for (i=0; i<me->totface; i++, mf++) {
741                         unsigned int fidx= mf->v4 ? 3:2;
742                         do {
743                                 calc_weightpaint_vert_color(&wtcol[(i*4 + fidx)*4],
744                                                             &dvert[*(&mf->v1 + fidx)], coba,
745                                                             defbase_tot, defbase_act,
746                                                             dg_flags, selected, draw_flag);
747                         } while (fidx--);
748                 }
749
750                 MEM_freeN(dg_flags);
751         }
752         else {
753                 /* no weights, fill in zero */
754                 int col_i;
755                 weightpaint_color((unsigned char *)&col_i, coba, 0.0f);
756                 fill_vn_i((int *)wtcol, me->totface*4, col_i);
757         }
758
759         CustomData_add_layer(&dm->faceData, CD_WEIGHT_MCOL, CD_ASSIGN, wtcol, dm->numFaceData);
760 }
761
762 /* new value for useDeform -1  (hack for the gameengine):
763  * - apply only the modifier stack of the object, skipping the virtual modifiers,
764  * - don't apply the key
765  * - apply deform modifiers and input vertexco
766  */
767 static void mesh_calc_modifiers(Scene *scene, Object *ob, float (*inputVertexCos)[3],
768                                                                 DerivedMesh **deform_r, DerivedMesh **final_r,
769                                                                 int useRenderParams, int useDeform,
770                                                                 int needMapping, CustomDataMask dataMask, int index, int useCache)
771 {
772         Mesh *me = ob->data;
773         ModifierData *firstmd, *md;
774         LinkNode *datamasks, *curr;
775         CustomDataMask mask, nextmask, append_mask = 0;
776         float (*deformedVerts)[3] = NULL;
777         DerivedMesh *dm, *orcodm, *clothorcodm, *finaldm;
778         int numVerts = me->totvert;
779         int required_mode;
780         int isPrevDeform= FALSE;
781         int skipVirtualArmature = (useDeform < 0);
782         MultiresModifierData *mmd= get_multires_modifier(scene, ob, 0);
783         int has_multires = mmd != NULL, multires_applied = 0;
784         int sculpt_mode = ob->mode & OB_MODE_SCULPT && ob->sculpt;
785
786         int draw_flag= ((scene->toolsettings->multipaint ? CALC_WP_MULTIPAINT : 0) |
787                         (scene->toolsettings->auto_normalize ? CALC_WP_AUTO_NORMALIZE : 0));
788
789         if(mmd && !mmd->sculptlvl)
790                 has_multires = 0;
791
792         if(!skipVirtualArmature) {
793                 firstmd = modifiers_getVirtualModifierList(ob);
794         }
795         else {
796                 /* game engine exception */
797                 firstmd = ob->modifiers.first;
798                 if(firstmd && firstmd->type == eModifierType_Armature)
799                         firstmd = firstmd->next;
800         }
801
802         md = firstmd;
803
804         modifiers_clearErrors(ob);
805
806         if(useRenderParams) required_mode = eModifierMode_Render;
807         else required_mode = eModifierMode_Realtime;
808
809         datamasks = modifiers_calcDataMasks(scene, ob, md, dataMask, required_mode);
810         curr = datamasks;
811
812         if(deform_r) *deform_r = NULL;
813         *final_r = NULL;
814
815         if(useDeform) {
816                 if(inputVertexCos)
817                         deformedVerts = inputVertexCos;
818                 
819                 /* Apply all leading deforming modifiers */
820                 for(;md; md = md->next, curr = curr->next) {
821                         ModifierTypeInfo *mti = modifierType_getInfo(md->type);
822
823                         md->scene= scene;
824                         
825                         if(!modifier_isEnabled(scene, md, required_mode)) continue;
826                         if(useDeform < 0 && mti->dependsOnTime && mti->dependsOnTime(md)) continue;
827
828                         if(mti->type == eModifierTypeType_OnlyDeform) {
829                                 if(!deformedVerts)
830                                         deformedVerts = mesh_getVertexCos(me, &numVerts);
831
832                                 mti->deformVerts(md, ob, NULL, deformedVerts, numVerts, useRenderParams, useDeform);
833                         } else {
834                                 break;
835                         }
836                         
837                         /* grab modifiers until index i */
838                         if((index >= 0) && (modifiers_indexInObject(ob, md) >= index))
839                                 break;
840                 }
841
842                 /* Result of all leading deforming modifiers is cached for
843                  * places that wish to use the original mesh but with deformed
844                  * coordinates (vpaint, etc.)
845                  */
846                 if (deform_r) {
847                         *deform_r = CDDM_from_mesh(me, ob);
848
849                         if(deformedVerts) {
850                                 CDDM_apply_vert_coords(*deform_r, deformedVerts);
851                                 CDDM_calc_normals(*deform_r);
852                         }
853                 }
854         } else {
855                 /* default behaviour for meshes */
856                 if(inputVertexCos)
857                         deformedVerts = inputVertexCos;
858                 else
859                         deformedVerts = mesh_getVertexCos(me, &numVerts);
860         }
861
862
863         /* Now apply all remaining modifiers. If useDeform is off then skip
864          * OnlyDeform ones. 
865          */
866         dm = NULL;
867         orcodm = NULL;
868         clothorcodm = NULL;
869
870         for(;md; md = md->next, curr = curr->next) {
871                 ModifierTypeInfo *mti = modifierType_getInfo(md->type);
872
873                 md->scene= scene;
874
875                 if(!modifier_isEnabled(scene, md, required_mode)) continue;
876                 if(mti->type == eModifierTypeType_OnlyDeform && !useDeform) continue;
877                 if((mti->flags & eModifierTypeFlag_RequiresOriginalData) && dm) {
878                         modifier_setError(md, "Modifier requires original data, bad stack position.");
879                         continue;
880                 }
881                 if(sculpt_mode && (!has_multires || multires_applied)) {
882                         int unsupported= 0;
883
884                         if(scene->toolsettings->sculpt->flags & SCULPT_ONLY_DEFORM)
885                                 unsupported|= mti->type != eModifierTypeType_OnlyDeform;
886
887                         unsupported|= md->type == eModifierType_Multires && ((MultiresModifierData*)md)->sculptlvl==0;
888                         unsupported|= multires_applied;
889
890                         if(unsupported) {
891                                 modifier_setError(md, "Not supported in sculpt mode.");
892                                 continue;
893                         }
894                 }
895                 if(needMapping && !modifier_supportsMapping(md)) continue;
896                 if(useDeform < 0 && mti->dependsOnTime && mti->dependsOnTime(md)) continue;
897
898                 /* add an orco layer if needed by this modifier */
899                 if(mti->requiredDataMask)
900                         mask = mti->requiredDataMask(ob, md);
901                 else
902                         mask = 0;
903
904                 if(dm && (mask & CD_MASK_ORCO))
905                         add_orco_dm(ob, NULL, dm, orcodm, CD_ORCO);
906
907                 /* How to apply modifier depends on (a) what we already have as
908                  * a result of previous modifiers (could be a DerivedMesh or just
909                  * deformed vertices) and (b) what type the modifier is.
910                  */
911
912                 if(mti->type == eModifierTypeType_OnlyDeform) {
913                         /* No existing verts to deform, need to build them. */
914                         if(!deformedVerts) {
915                                 if(dm) {
916                                         /* Deforming a derived mesh, read the vertex locations
917                                          * out of the mesh and deform them. Once done with this
918                                          * run of deformers verts will be written back.
919                                          */
920                                         numVerts = dm->getNumVerts(dm);
921                                         deformedVerts =
922                                                 MEM_mallocN(sizeof(*deformedVerts) * numVerts, "dfmv");
923                                         dm->getVertCos(dm, deformedVerts);
924                                 } else {
925                                         deformedVerts = mesh_getVertexCos(me, &numVerts);
926                                 }
927                         }
928
929                         /* if this is not the last modifier in the stack then recalculate the normals
930                          * to avoid giving bogus normals to the next modifier see: [#23673] */
931                         if(isPrevDeform &&  mti->dependsOnNormals && mti->dependsOnNormals(md)) {
932                                 /* XXX, this covers bug #23673, but we may need normal calc for other types */
933                                 if(dm && dm->type == DM_TYPE_CDDM) {
934                                         CDDM_apply_vert_coords(dm, deformedVerts);
935                                         CDDM_calc_normals(dm);
936                                 }
937                         }
938
939                         mti->deformVerts(md, ob, dm, deformedVerts, numVerts, useRenderParams, useDeform);
940                 } else {
941                         DerivedMesh *ndm;
942
943                         /* determine which data layers are needed by following modifiers */
944                         if(curr->next)
945                                 nextmask= (CustomDataMask)GET_INT_FROM_POINTER(curr->next->link);
946                         else
947                                 nextmask= dataMask;
948
949                         /* apply vertex coordinates or build a DerivedMesh as necessary */
950                         if(dm) {
951                                 if(deformedVerts) {
952                                         DerivedMesh *tdm = CDDM_copy(dm);
953                                         dm->release(dm);
954                                         dm = tdm;
955
956                                         CDDM_apply_vert_coords(dm, deformedVerts);
957                                         CDDM_calc_normals(dm);
958                                 }
959                         } else {
960                                 dm = CDDM_from_mesh(me, ob);
961
962                                 if(deformedVerts) {
963                                         CDDM_apply_vert_coords(dm, deformedVerts);
964                                         CDDM_calc_normals(dm);
965                                 }
966
967                                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
968                                         add_weight_mcol_dm(ob, dm, draw_flag); 
969
970                                 /* Constructive modifiers need to have an origindex
971                                  * otherwise they wont have anywhere to copy the data from.
972                                  *
973                                  * Also create ORIGINDEX data if any of the following modifiers
974                                  * requests it, this way Mirror, Solidify etc will keep ORIGINDEX
975                                  * data by using generic DM_copy_vert_data() functions.
976                                  */
977                                 if(needMapping || (nextmask & CD_MASK_ORIGINDEX)) {
978                                         /* calc */
979                                         DM_add_vert_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
980                                         DM_add_edge_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
981                                         DM_add_face_layer(dm, CD_ORIGINDEX, CD_CALLOC, NULL);
982
983                                         range_vn_i(DM_get_vert_data_layer(dm, CD_ORIGINDEX), dm->numVertData, 0);
984                                         range_vn_i(DM_get_edge_data_layer(dm, CD_ORIGINDEX), dm->numEdgeData, 0);
985                                         range_vn_i(DM_get_face_data_layer(dm, CD_ORIGINDEX), dm->numFaceData, 0);
986                                 }
987                         }
988
989                         
990                         /* set the DerivedMesh to only copy needed data */
991                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link);
992                         /* needMapping check here fixes bug [#28112], otherwise its
993                          * possible that it wont be copied */
994                         mask |= append_mask;
995                         DM_set_only_copy(dm, mask | (needMapping ? CD_MASK_ORIGINDEX : 0));
996                         
997                         /* add cloth rest shape key if need */
998                         if(mask & CD_MASK_CLOTH_ORCO)
999                                 add_orco_dm(ob, NULL, dm, clothorcodm, CD_CLOTH_ORCO);
1000
1001                         /* add an origspace layer if needed */
1002                         if(((CustomDataMask)GET_INT_FROM_POINTER(curr->link)) & CD_MASK_ORIGSPACE)
1003                                 if(!CustomData_has_layer(&dm->faceData, CD_ORIGSPACE))
1004                                         DM_add_face_layer(dm, CD_ORIGSPACE, CD_DEFAULT, NULL);
1005
1006                         ndm = mti->applyModifier(md, ob, dm, useRenderParams, useCache);
1007
1008                         if(ndm) {
1009                                 /* if the modifier returned a new dm, release the old one */
1010                                 if(dm && dm != ndm) dm->release(dm);
1011
1012                                 dm = ndm;
1013
1014                                 if(deformedVerts) {
1015                                         if(deformedVerts != inputVertexCos)
1016                                                 MEM_freeN(deformedVerts);
1017
1018                                         deformedVerts = NULL;
1019                                 }
1020                         } 
1021
1022                         /* create an orco derivedmesh in parallel */
1023                         if(nextmask & CD_MASK_ORCO) {
1024                                 if(!orcodm)
1025                                         orcodm= create_orco_dm(ob, me, NULL, CD_ORCO);
1026
1027                                 nextmask &= ~CD_MASK_ORCO;
1028                                 DM_set_only_copy(orcodm, nextmask | CD_MASK_ORIGINDEX);
1029                                 ndm = mti->applyModifier(md, ob, orcodm, useRenderParams, 0);
1030
1031                                 if(ndm) {
1032                                         /* if the modifier returned a new dm, release the old one */
1033                                         if(orcodm && orcodm != ndm) orcodm->release(orcodm);
1034                                         orcodm = ndm;
1035                                 }
1036                         }
1037
1038                         /* create cloth orco derivedmesh in parallel */
1039                         if(nextmask & CD_MASK_CLOTH_ORCO) {
1040                                 if(!clothorcodm)
1041                                         clothorcodm= create_orco_dm(ob, me, NULL, CD_CLOTH_ORCO);
1042
1043                                 nextmask &= ~CD_MASK_CLOTH_ORCO;
1044                                 DM_set_only_copy(clothorcodm, nextmask | CD_MASK_ORIGINDEX);
1045                                 ndm = mti->applyModifier(md, ob, clothorcodm, useRenderParams, 0);
1046
1047                                 if(ndm) {
1048                                         /* if the modifier returned a new dm, release the old one */
1049                                         if(clothorcodm && clothorcodm != ndm) clothorcodm->release(clothorcodm);
1050                                         clothorcodm = ndm;
1051                                 }
1052                         }
1053
1054                         /* in case of dynamic paint, make sure preview mask remains for following modifiers */
1055                         if (md->type == eModifierType_DynamicPaint)
1056                                 append_mask |= CD_MASK_WEIGHT_MCOL;
1057                 }
1058
1059                 isPrevDeform= (mti->type == eModifierTypeType_OnlyDeform);
1060
1061                 /* grab modifiers until index i */
1062                 if((index >= 0) && (modifiers_indexInObject(ob, md) >= index))
1063                         break;
1064
1065                 if(sculpt_mode && md->type == eModifierType_Multires)
1066                         multires_applied = 1;
1067         }
1068
1069         for(md=firstmd; md; md=md->next)
1070                 modifier_freeTemporaryData(md);
1071
1072         /* Yay, we are done. If we have a DerivedMesh and deformed vertices
1073          * need to apply these back onto the DerivedMesh. If we have no
1074          * DerivedMesh then we need to build one.
1075          */
1076         if(dm && deformedVerts) {
1077                 finaldm = CDDM_copy(dm);
1078
1079                 dm->release(dm);
1080
1081                 CDDM_apply_vert_coords(finaldm, deformedVerts);
1082                 CDDM_calc_normals(finaldm);
1083
1084                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
1085                         add_weight_mcol_dm(ob, finaldm, draw_flag);
1086         } else if(dm) {
1087                 finaldm = dm;
1088         } else {
1089                 finaldm = CDDM_from_mesh(me, ob);
1090
1091                 if(deformedVerts) {
1092                         CDDM_apply_vert_coords(finaldm, deformedVerts);
1093                         CDDM_calc_normals(finaldm);
1094                 }
1095
1096                 if((dataMask & CD_MASK_WEIGHT_MCOL) && (ob->mode & OB_MODE_WEIGHT_PAINT))
1097                         add_weight_mcol_dm(ob, finaldm, draw_flag);
1098         }
1099
1100         /* add an orco layer if needed */
1101         if(dataMask & CD_MASK_ORCO) {
1102                 add_orco_dm(ob, NULL, finaldm, orcodm, CD_ORCO);
1103
1104                 if(deform_r && *deform_r)
1105                         add_orco_dm(ob, NULL, *deform_r, NULL, CD_ORCO);
1106         }
1107
1108 #ifdef WITH_GAMEENGINE
1109         /* NavMesh - this is a hack but saves having a NavMesh modifier */
1110         if ((ob->gameflag & OB_NAVMESH) && (finaldm->type == DM_TYPE_CDDM)) {
1111                 DerivedMesh *tdm;
1112                 tdm= navmesh_dm_createNavMeshForVisualization(finaldm);
1113                 if (finaldm != tdm) {
1114                         finaldm->release(finaldm);
1115                         finaldm= tdm;
1116                 }
1117         }
1118 #endif /* WITH_GAMEENGINE */
1119
1120         *final_r = finaldm;
1121
1122         if(orcodm)
1123                 orcodm->release(orcodm);
1124         if(clothorcodm)
1125                 clothorcodm->release(clothorcodm);
1126
1127         if(deformedVerts && deformedVerts != inputVertexCos)
1128                 MEM_freeN(deformedVerts);
1129
1130         BLI_linklist_free(datamasks, NULL);
1131 }
1132
1133 float (*editmesh_get_vertex_cos(EditMesh *em, int *numVerts_r))[3]
1134 {
1135         int i, numVerts = *numVerts_r = BLI_countlist(&em->verts);
1136         float (*cos)[3];
1137         EditVert *eve;
1138
1139         cos = MEM_mallocN(sizeof(*cos)*numVerts, "vertexcos");
1140         for (i=0,eve=em->verts.first; i<numVerts; i++,eve=eve->next) {
1141                 copy_v3_v3(cos[i], eve->co);
1142         }
1143
1144         return cos;
1145 }
1146
1147 int editmesh_modifier_is_enabled(Scene *scene, ModifierData *md, DerivedMesh *dm)
1148 {
1149         ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1150         int required_mode = eModifierMode_Realtime | eModifierMode_Editmode;
1151
1152         if(!modifier_isEnabled(scene, md, required_mode)) return 0;
1153         if((mti->flags & eModifierTypeFlag_RequiresOriginalData) && dm) {
1154                 modifier_setError(md, "Modifier requires original data, bad stack position.");
1155                 return 0;
1156         }
1157         
1158         return 1;
1159 }
1160
1161 static void editmesh_calc_modifiers(Scene *scene, Object *ob, EditMesh *em, DerivedMesh **cage_r,
1162                                                                         DerivedMesh **final_r,
1163                                                                         CustomDataMask dataMask)
1164 {
1165         ModifierData *md;
1166         float (*deformedVerts)[3] = NULL;
1167         CustomDataMask mask;
1168         DerivedMesh *dm, *orcodm = NULL;
1169         int i, numVerts = 0, cageIndex = modifiers_getCageIndex(scene, ob, NULL, 1);
1170         LinkNode *datamasks, *curr;
1171         int required_mode = eModifierMode_Realtime | eModifierMode_Editmode;
1172
1173         modifiers_clearErrors(ob);
1174
1175         if(cage_r && cageIndex == -1) {
1176                 *cage_r = editmesh_get_derived(em, NULL);
1177         }
1178
1179         dm = NULL;
1180         md = modifiers_getVirtualModifierList(ob);
1181
1182         datamasks = modifiers_calcDataMasks(scene, ob, md, dataMask, required_mode);
1183
1184         curr = datamasks;
1185         for(i = 0; md; i++, md = md->next, curr = curr->next) {
1186                 ModifierTypeInfo *mti = modifierType_getInfo(md->type);
1187
1188                 md->scene= scene;
1189                 
1190                 if(!editmesh_modifier_is_enabled(scene, md, dm))
1191                         continue;
1192
1193                 /* add an orco layer if needed by this modifier */
1194                 if(dm && mti->requiredDataMask) {
1195                         mask = mti->requiredDataMask(ob, md);
1196                         if(mask & CD_MASK_ORCO)
1197                                 add_orco_dm(ob, em, dm, orcodm, CD_ORCO);
1198                 }
1199
1200                 /* How to apply modifier depends on (a) what we already have as
1201                  * a result of previous modifiers (could be a DerivedMesh or just
1202                  * deformed vertices) and (b) what type the modifier is.
1203                  */
1204
1205                 if(mti->type == eModifierTypeType_OnlyDeform) {
1206                         /* No existing verts to deform, need to build them. */
1207                         if(!deformedVerts) {
1208                                 if(dm) {
1209                                         /* Deforming a derived mesh, read the vertex locations
1210                                          * out of the mesh and deform them. Once done with this
1211                                          * run of deformers verts will be written back.
1212                                          */
1213                                         numVerts = dm->getNumVerts(dm);
1214                                         deformedVerts =
1215                                                 MEM_mallocN(sizeof(*deformedVerts) * numVerts, "dfmv");
1216                                         dm->getVertCos(dm, deformedVerts);
1217                                 } else {
1218                                         deformedVerts = editmesh_get_vertex_cos(em, &numVerts);
1219                                 }
1220                         }
1221
1222                         if (mti->deformVertsEM)
1223                                 mti->deformVertsEM(md, ob, em, dm, deformedVerts, numVerts);
1224                         else mti->deformVerts(md, ob, dm, deformedVerts, numVerts, 0, 0);
1225                 } else {
1226                         DerivedMesh *ndm;
1227
1228                         /* apply vertex coordinates or build a DerivedMesh as necessary */
1229                         if(dm) {
1230                                 if(deformedVerts) {
1231                                         DerivedMesh *tdm = CDDM_copy(dm);
1232                                         if(!(cage_r && dm == *cage_r)) dm->release(dm);
1233                                         dm = tdm;
1234
1235                                         CDDM_apply_vert_coords(dm, deformedVerts);
1236                                         CDDM_calc_normals(dm);
1237                                 } else if(cage_r && dm == *cage_r) {
1238                                         /* dm may be changed by this modifier, so we need to copy it
1239                                          */
1240                                         dm = CDDM_copy(dm);
1241                                 }
1242
1243                         } else {
1244                                 dm = CDDM_from_editmesh(em, ob->data);
1245
1246                                 if(deformedVerts) {
1247                                         CDDM_apply_vert_coords(dm, deformedVerts);
1248                                         CDDM_calc_normals(dm);
1249                                 }
1250                         }
1251
1252                         /* create an orco derivedmesh in parallel */
1253                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link);
1254                         if(mask & CD_MASK_ORCO) {
1255                                 if(!orcodm)
1256                                         orcodm= create_orco_dm(ob, ob->data, em, CD_ORCO);
1257
1258                                 mask &= ~CD_MASK_ORCO;
1259                                 DM_set_only_copy(orcodm, mask | CD_MASK_ORIGINDEX);
1260
1261                                 if (mti->applyModifierEM)
1262                                         ndm = mti->applyModifierEM(md, ob, em, orcodm);
1263                                 else
1264                                         ndm = mti->applyModifier(md, ob, orcodm, 0, 0);
1265
1266                                 if(ndm) {
1267                                         /* if the modifier returned a new dm, release the old one */
1268                                         if(orcodm && orcodm != ndm) orcodm->release(orcodm);
1269                                         orcodm = ndm;
1270                                 }
1271                         }
1272
1273                         /* set the DerivedMesh to only copy needed data */
1274                         mask= (CustomDataMask)GET_INT_FROM_POINTER(curr->link); /* CD_MASK_ORCO may have been cleared above */
1275
1276                         DM_set_only_copy(dm, mask | CD_MASK_ORIGINDEX);
1277
1278                         if(mask & CD_MASK_ORIGSPACE)
1279                                 if(!CustomData_has_layer(&dm->faceData, CD_ORIGSPACE))
1280                                         DM_add_face_layer(dm, CD_ORIGSPACE, CD_DEFAULT, NULL);
1281                         
1282                         if (mti->applyModifierEM)
1283                                 ndm = mti->applyModifierEM(md, ob, em, dm);
1284                         else
1285                                 ndm = mti->applyModifier(md, ob, dm, 0, 0);
1286
1287                         if (ndm) {
1288                                 if(dm && dm != ndm)
1289                                         dm->release(dm);
1290
1291                                 dm = ndm;
1292
1293                                 if (deformedVerts) {
1294                                         MEM_freeN(deformedVerts);
1295                                         deformedVerts = NULL;
1296                                 }
1297                         }
1298                 }
1299
1300                 if(cage_r && i == cageIndex) {
1301                         if(dm && deformedVerts) {
1302                                 *cage_r = CDDM_copy(dm);
1303                                 CDDM_apply_vert_coords(*cage_r, deformedVerts);
1304                         } else if(dm) {
1305                                 *cage_r = dm;
1306                         } else {
1307                                 *cage_r =
1308                                         editmesh_get_derived(em,
1309                                                 deformedVerts ? MEM_dupallocN(deformedVerts) : NULL);
1310                         }
1311                 }
1312         }
1313
1314         BLI_linklist_free(datamasks, NULL);
1315
1316         /* Yay, we are done. If we have a DerivedMesh and deformed vertices need
1317          * to apply these back onto the DerivedMesh. If we have no DerivedMesh
1318          * then we need to build one.
1319          */
1320         if(dm && deformedVerts) {
1321                 *final_r = CDDM_copy(dm);
1322
1323                 if(!(cage_r && dm == *cage_r)) dm->release(dm);
1324
1325                 CDDM_apply_vert_coords(*final_r, deformedVerts);
1326                 CDDM_calc_normals(*final_r);
1327         } else if (dm) {
1328                 *final_r = dm;
1329         } else if (!deformedVerts && cage_r && *cage_r) {
1330                 *final_r = *cage_r;
1331         } else {
1332                 *final_r = editmesh_get_derived(em, deformedVerts);
1333                 deformedVerts = NULL;
1334         }
1335
1336         /* add an orco layer if needed */
1337         if(dataMask & CD_MASK_ORCO)
1338                 add_orco_dm(ob, em, *final_r, orcodm, CD_ORCO);
1339
1340         if(orcodm)
1341                 orcodm->release(orcodm);
1342
1343         if(deformedVerts)
1344                 MEM_freeN(deformedVerts);
1345 }
1346
1347 static void clear_mesh_caches(Object *ob)
1348 {
1349         Mesh *me= ob->data;
1350
1351                 /* also serves as signal to remake texspace */
1352         if (ob->bb) {
1353                 MEM_freeN(ob->bb);
1354                 ob->bb = NULL;
1355         }
1356         if (me->bb) {
1357                 MEM_freeN(me->bb);
1358                 me->bb = NULL;
1359         }
1360
1361         freedisplist(&ob->disp);
1362
1363         if (ob->derivedFinal) {
1364                 ob->derivedFinal->needsFree = 1;
1365                 ob->derivedFinal->release(ob->derivedFinal);
1366                 ob->derivedFinal= NULL;
1367         }
1368         if (ob->derivedDeform) {
1369                 ob->derivedDeform->needsFree = 1;
1370                 ob->derivedDeform->release(ob->derivedDeform);
1371                 ob->derivedDeform= NULL;
1372         }
1373
1374         if(ob->sculpt) {
1375                 object_sculpt_modifiers_changed(ob);
1376         }
1377 }
1378
1379 static void mesh_build_data(Scene *scene, Object *ob, CustomDataMask dataMask)
1380 {
1381         Object *obact = scene->basact?scene->basact->object:NULL;
1382         int editing = paint_facesel_test(ob) || paint_vertsel_test(ob);/* paint_vertsel_test */
1383         /* weight paint and face select need original indices because of selection buffer drawing */
1384         int needMapping = (ob==obact) && (editing || (ob->mode & (OB_MODE_WEIGHT_PAINT|OB_MODE_VERTEX_PAINT)));
1385
1386         clear_mesh_caches(ob);
1387
1388         mesh_calc_modifiers(scene, ob, NULL, &ob->derivedDeform,
1389                                                 &ob->derivedFinal, 0, 1,
1390                                                 needMapping, dataMask, -1, 1);
1391
1392         DM_set_object_boundbox (ob, ob->derivedFinal);
1393
1394         ob->derivedFinal->needsFree = 0;
1395         ob->derivedDeform->needsFree = 0;
1396         ob->lastDataMask = dataMask;
1397 }
1398
1399 static void editmesh_build_data(Scene *scene, Object *obedit, EditMesh *em, CustomDataMask dataMask)
1400 {
1401         clear_mesh_caches(obedit);
1402
1403         if (em->derivedFinal) {
1404                 if (em->derivedFinal!=em->derivedCage) {
1405                         em->derivedFinal->needsFree = 1;
1406                         em->derivedFinal->release(em->derivedFinal);
1407                 }
1408                 em->derivedFinal = NULL;
1409         }
1410         if (em->derivedCage) {
1411                 em->derivedCage->needsFree = 1;
1412                 em->derivedCage->release(em->derivedCage);
1413                 em->derivedCage = NULL;
1414         }
1415
1416         editmesh_calc_modifiers(scene, obedit, em, &em->derivedCage, &em->derivedFinal, dataMask);
1417         DM_set_object_boundbox (obedit, em->derivedFinal);
1418
1419         em->lastDataMask = dataMask;
1420         em->derivedFinal->needsFree = 0;
1421         em->derivedCage->needsFree = 0;
1422 }
1423
1424 void makeDerivedMesh(Scene *scene, Object *ob, EditMesh *em, CustomDataMask dataMask)
1425 {
1426         if (em) {
1427                 editmesh_build_data(scene, ob, em, dataMask);
1428         } else {
1429                 mesh_build_data(scene, ob, dataMask);
1430         }
1431 }
1432
1433 /***/
1434
1435 DerivedMesh *mesh_get_derived_final(Scene *scene, Object *ob, CustomDataMask dataMask)
1436 {
1437         /* if there's no derived mesh or the last data mask used doesn't include
1438          * the data we need, rebuild the derived mesh
1439          */
1440         if(!ob->derivedFinal || (dataMask & ob->lastDataMask) != dataMask)
1441                 mesh_build_data(scene, ob, dataMask);
1442
1443         return ob->derivedFinal;
1444 }
1445
1446 DerivedMesh *mesh_get_derived_deform(Scene *scene, Object *ob, CustomDataMask dataMask)
1447 {
1448         /* if there's no derived mesh or the last data mask used doesn't include
1449          * the data we need, rebuild the derived mesh
1450          */
1451         if(!ob->derivedDeform || (dataMask & ob->lastDataMask) != dataMask)
1452                 mesh_build_data(scene, ob, dataMask);
1453
1454         return ob->derivedDeform;
1455 }
1456
1457 DerivedMesh *mesh_create_derived_render(Scene *scene, Object *ob, CustomDataMask dataMask)
1458 {
1459         DerivedMesh *final;
1460         
1461         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 1, 1, 0, dataMask, -1, 0);
1462
1463         return final;
1464 }
1465
1466 DerivedMesh *mesh_create_derived_index_render(Scene *scene, Object *ob, CustomDataMask dataMask, int index)
1467 {
1468         DerivedMesh *final;
1469         
1470         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 1, 1, 0, dataMask, index, 0);
1471
1472         return final;
1473 }
1474
1475 DerivedMesh *mesh_create_derived_view(Scene *scene, Object *ob, CustomDataMask dataMask)
1476 {
1477         DerivedMesh *final;
1478
1479         mesh_calc_modifiers(scene, ob, NULL, NULL, &final, 0, 1, 0, dataMask, -1, 0);
1480
1481         return final;
1482 }
1483
1484 DerivedMesh *mesh_create_derived_no_deform(Scene *scene, Object *ob, float (*vertCos)[3],
1485                                                                                    CustomDataMask dataMask)
1486 {
1487         DerivedMesh *final;
1488         
1489         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, 0, 0, dataMask, -1, 0);
1490
1491         return final;
1492 }
1493
1494 DerivedMesh *mesh_create_derived_no_virtual(Scene *scene, Object *ob, float (*vertCos)[3],
1495                                                                                         CustomDataMask dataMask)
1496 {
1497         DerivedMesh *final;
1498         
1499         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, -1, 0, dataMask, -1, 0);
1500
1501         return final;
1502 }
1503
1504 DerivedMesh *mesh_create_derived_physics(Scene *scene, Object *ob, float (*vertCos)[3],
1505                                                                                         CustomDataMask dataMask)
1506 {
1507         DerivedMesh *final;
1508         
1509         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 0, -1, 1, dataMask, -1, 0);
1510
1511         return final;
1512 }
1513
1514 DerivedMesh *mesh_create_derived_no_deform_render(Scene *scene, Object *ob,
1515                                                                                                   float (*vertCos)[3],
1516                                                                                                   CustomDataMask dataMask)
1517 {
1518         DerivedMesh *final;
1519
1520         mesh_calc_modifiers(scene, ob, vertCos, NULL, &final, 1, 0, 0, dataMask, -1, 0);
1521
1522         return final;
1523 }
1524
1525 /***/
1526
1527 DerivedMesh *editmesh_get_derived_cage_and_final(Scene *scene, Object *obedit, EditMesh *em, DerivedMesh **final_r,
1528                                                                                                  CustomDataMask dataMask)
1529 {
1530         /* if there's no derived mesh or the last data mask used doesn't include
1531          * the data we need, rebuild the derived mesh
1532          */
1533         if(!em->derivedCage ||
1534            (em->lastDataMask & dataMask) != dataMask)
1535                 editmesh_build_data(scene, obedit, em, dataMask);
1536
1537         *final_r = em->derivedFinal;
1538         return em->derivedCage;
1539 }
1540
1541 DerivedMesh *editmesh_get_derived_cage(Scene *scene, Object *obedit, EditMesh *em, CustomDataMask dataMask)
1542 {
1543         /* if there's no derived mesh or the last data mask used doesn't include
1544          * the data we need, rebuild the derived mesh
1545          */
1546         if(!em->derivedCage ||
1547            (em->lastDataMask & dataMask) != dataMask)
1548                 editmesh_build_data(scene, obedit, em, dataMask);
1549
1550         return em->derivedCage;
1551 }
1552
1553 DerivedMesh *editmesh_get_derived_base(Object *UNUSED(obedit), EditMesh *em)
1554 {
1555         return editmesh_get_derived(em, NULL);
1556 }
1557
1558
1559 /* ********* For those who don't grasp derived stuff! (ton) :) *************** */
1560
1561 static void make_vertexcosnos__mapFunc(void *userData, int index, float *co, float *no_f, short *no_s)
1562 {
1563         float *vec = userData;
1564         
1565         vec+= 6*index;
1566
1567         /* check if we've been here before (normal should not be 0) */
1568         if(vec[3] || vec[4] || vec[5]) return;
1569
1570         copy_v3_v3(vec, co);
1571         vec+= 3;
1572         if(no_f) {
1573                 copy_v3_v3(vec, no_f);
1574         }
1575         else {
1576                 normal_short_to_float_v3(vec, no_s);
1577         }
1578 }
1579
1580 /* always returns original amount me->totvert of vertices and normals, but fully deformed and subsurfered */
1581 /* this is needed for all code using vertexgroups (no subsurf support) */
1582 /* it stores the normals as floats, but they can still be scaled as shorts (32767 = unit) */
1583 /* in use now by vertex/weight paint and particle generating */
1584
1585 float *mesh_get_mapped_verts_nors(Scene *scene, Object *ob)
1586 {
1587         Mesh *me= ob->data;
1588         DerivedMesh *dm;
1589         float *vertexcosnos;
1590         
1591         /* lets prevent crashing... */
1592         if(ob->type!=OB_MESH || me->totvert==0)
1593                 return NULL;
1594         
1595         dm= mesh_get_derived_final(scene, ob, CD_MASK_BAREMESH);
1596         vertexcosnos= MEM_callocN(6*sizeof(float)*me->totvert, "vertexcosnos map");
1597         
1598         if(dm->foreachMappedVert) {
1599                 dm->foreachMappedVert(dm, make_vertexcosnos__mapFunc, vertexcosnos);
1600         }
1601         else {
1602                 float *fp= vertexcosnos;
1603                 int a;
1604                 
1605                 for(a=0; a< me->totvert; a++, fp+=6) {
1606                         dm->getVertCo(dm, a, fp);
1607                         dm->getVertNo(dm, a, fp+3);
1608                 }
1609         }
1610         
1611         dm->release(dm);
1612         return vertexcosnos;
1613 }
1614
1615 /* ******************* GLSL ******************** */
1616
1617 typedef struct
1618 {
1619         float * precomputedFaceNormals;
1620         MTFace * mtface;        // texture coordinates
1621         MFace * mface;          // indices
1622         MVert * mvert;          // vertices & normals
1623         float (*orco)[3];
1624         float (*tangent)[4];    // destination
1625         int numFaces;
1626
1627 } SGLSLMeshToTangent;
1628
1629 // interface
1630 #include "mikktspace.h"
1631
1632 static int GetNumFaces(const SMikkTSpaceContext * pContext)
1633 {
1634         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
1635         return pMesh->numFaces;
1636 }
1637
1638 static int GetNumVertsOfFace(const SMikkTSpaceContext * pContext, const int face_num)
1639 {
1640         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
1641         return pMesh->mface[face_num].v4!=0 ? 4 : 3;
1642 }
1643
1644 static void GetPosition(const SMikkTSpaceContext * pContext, float fPos[], const int face_num, const int vert_index)
1645 {
1646         //assert(vert_index>=0 && vert_index<4);
1647         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
1648         const float *co= pMesh->mvert[(&pMesh->mface[face_num].v1)[vert_index]].co;
1649         copy_v3_v3(fPos, co);
1650 }
1651
1652 static void GetTextureCoordinate(const SMikkTSpaceContext * pContext, float fUV[], const int face_num, const int vert_index)
1653 {
1654         //assert(vert_index>=0 && vert_index<4);
1655         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
1656
1657         if(pMesh->mtface!=NULL) {
1658                 float * uv = pMesh->mtface[face_num].uv[vert_index];
1659                 fUV[0]=uv[0]; fUV[1]=uv[1];
1660         }
1661         else {
1662                 const float *orco= pMesh->orco[(&pMesh->mface[face_num].v1)[vert_index]];
1663                 map_to_sphere( &fUV[0], &fUV[1], orco[0], orco[1], orco[2]);
1664         }
1665 }
1666
1667 static void GetNormal(const SMikkTSpaceContext * pContext, float fNorm[], const int face_num, const int vert_index)
1668 {
1669         //assert(vert_index>=0 && vert_index<4);
1670         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
1671
1672         const int smoothnormal = (pMesh->mface[face_num].flag & ME_SMOOTH);
1673         if(!smoothnormal) {     // flat
1674                 if(pMesh->precomputedFaceNormals) {
1675                         copy_v3_v3(fNorm, &pMesh->precomputedFaceNormals[3*face_num]);
1676                 }
1677                 else {
1678                         MFace *mf= &pMesh->mface[face_num];
1679                         float *p0= pMesh->mvert[mf->v1].co;
1680                         float *p1= pMesh->mvert[mf->v2].co;
1681                         float *p2= pMesh->mvert[mf->v3].co;
1682
1683                         if(mf->v4) {
1684                                 float *p3 = pMesh->mvert[mf->v4].co;
1685                                 normal_quad_v3(fNorm, p0, p1, p2, p3);
1686                         }
1687                         else {
1688                                 normal_tri_v3(fNorm, p0, p1, p2);
1689                         }
1690                 }
1691         }
1692         else {
1693                 const short *no= pMesh->mvert[(&pMesh->mface[face_num].v1)[vert_index]].no;
1694                 normal_short_to_float_v3(fNorm, no);
1695         }
1696 }
1697 static void SetTSpace(const SMikkTSpaceContext * pContext, const float fvTangent[], const float fSign, const int face_num, const int iVert)
1698 {
1699         //assert(vert_index>=0 && vert_index<4);
1700         SGLSLMeshToTangent * pMesh = (SGLSLMeshToTangent *) pContext->m_pUserData;
1701         float * pRes = pMesh->tangent[4*face_num+iVert];
1702         copy_v3_v3(pRes, fvTangent);
1703         pRes[3]=fSign;
1704 }
1705
1706
1707 void DM_add_tangent_layer(DerivedMesh *dm)
1708 {
1709         /* mesh vars */
1710         MTFace *mtface, *tf;
1711         MFace *mface, *mf;
1712         MVert *mvert, *v1, *v2, *v3, *v4;
1713         MemArena *arena= NULL;
1714         VertexTangent **vtangents= NULL;
1715         float (*orco)[3]= NULL, (*tangent)[4];
1716         float *uv1, *uv2, *uv3, *uv4, *vtang;
1717         float fno[3], tang[3], uv[4][2];
1718         int i, j, len, mf_vi[4], totvert, totface, iCalcNewMethod;
1719         float *nors;
1720
1721         if(CustomData_get_layer_index(&dm->faceData, CD_TANGENT) != -1)
1722                 return;
1723
1724         nors = dm->getFaceDataArray(dm, CD_NORMAL);
1725
1726         /* check we have all the needed layers */
1727         totvert= dm->getNumVerts(dm);
1728         totface= dm->getNumFaces(dm);
1729
1730         mvert= dm->getVertArray(dm);
1731         mface= dm->getFaceArray(dm);
1732         mtface= dm->getFaceDataArray(dm, CD_MTFACE);
1733
1734         if(!mtface) {
1735                 orco= dm->getVertDataArray(dm, CD_ORCO);
1736                 if(!orco)
1737                         return;
1738         }
1739         
1740         /* create tangent layer */
1741         DM_add_face_layer(dm, CD_TANGENT, CD_CALLOC, NULL);
1742         tangent= DM_get_face_data_layer(dm, CD_TANGENT);
1743         
1744         /* allocate some space */
1745         arena= BLI_memarena_new(BLI_MEMARENA_STD_BUFSIZE, "tangent layer arena");
1746         BLI_memarena_use_calloc(arena);
1747         vtangents= MEM_callocN(sizeof(VertexTangent*)*totvert, "VertexTangent");
1748
1749         // new computation method
1750         iCalcNewMethod = 1;
1751         if(iCalcNewMethod != 0) {
1752                 SGLSLMeshToTangent mesh2tangent= {0};
1753                 SMikkTSpaceContext sContext= {0};
1754                 SMikkTSpaceInterface sInterface= {0};
1755
1756                 mesh2tangent.precomputedFaceNormals = nors;
1757                 mesh2tangent.mtface = mtface;
1758                 mesh2tangent.mface = mface;
1759                 mesh2tangent.mvert = mvert;
1760                 mesh2tangent.orco = orco;
1761                 mesh2tangent.tangent = tangent;
1762                 mesh2tangent.numFaces = totface;
1763
1764                 sContext.m_pUserData = &mesh2tangent;
1765                 sContext.m_pInterface = &sInterface;
1766                 sInterface.m_getNumFaces = GetNumFaces;
1767                 sInterface.m_getNumVerticesOfFace = GetNumVertsOfFace;
1768                 sInterface.m_getPosition = GetPosition;
1769                 sInterface.m_getTexCoord = GetTextureCoordinate;
1770                 sInterface.m_getNormal = GetNormal;
1771                 sInterface.m_setTSpaceBasic = SetTSpace;
1772
1773                 // 0 if failed
1774                 iCalcNewMethod = genTangSpaceDefault(&sContext);
1775         }
1776
1777         if(!iCalcNewMethod) {
1778                 /* sum tangents at connected vertices */
1779                 for(i=0, tf=mtface, mf=mface; i < totface; mf++, tf++, i++) {
1780                         v1= &mvert[mf->v1];
1781                         v2= &mvert[mf->v2];
1782                         v3= &mvert[mf->v3];
1783
1784                         if (mf->v4) {
1785                                 v4= &mvert[mf->v4];
1786                                 normal_quad_v3( fno,v4->co, v3->co, v2->co, v1->co);
1787                         }
1788                         else {
1789                                 v4= NULL;
1790                                 normal_tri_v3( fno,v3->co, v2->co, v1->co);
1791                         }
1792                 
1793                         if(mtface) {
1794                                 uv1= tf->uv[0];
1795                                 uv2= tf->uv[1];
1796                                 uv3= tf->uv[2];
1797                                 uv4= tf->uv[3];
1798                         }
1799                         else {
1800                                 uv1= uv[0]; uv2= uv[1]; uv3= uv[2]; uv4= uv[3];
1801                                 map_to_sphere( &uv[0][0], &uv[0][1],orco[mf->v1][0], orco[mf->v1][1], orco[mf->v1][2]);
1802                                 map_to_sphere( &uv[1][0], &uv[1][1],orco[mf->v2][0], orco[mf->v2][1], orco[mf->v2][2]);
1803                                 map_to_sphere( &uv[2][0], &uv[2][1],orco[mf->v3][0], orco[mf->v3][1], orco[mf->v3][2]);
1804                                 if(v4)
1805                                         map_to_sphere( &uv[3][0], &uv[3][1],orco[mf->v4][0], orco[mf->v4][1], orco[mf->v4][2]);
1806                         }
1807                 
1808                         tangent_from_uv(uv1, uv2, uv3, v1->co, v2->co, v3->co, fno, tang);
1809                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v1], tang, uv1);
1810                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v2], tang, uv2);
1811                         sum_or_add_vertex_tangent(arena, &vtangents[mf->v3], tang, uv3);
1812                 
1813                         if(mf->v4) {
1814                                 v4= &mvert[mf->v4];
1815                         
1816                                 tangent_from_uv(uv1, uv3, uv4, v1->co, v3->co, v4->co, fno, tang);
1817                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v1], tang, uv1);
1818                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v3], tang, uv3);
1819                                 sum_or_add_vertex_tangent(arena, &vtangents[mf->v4], tang, uv4);
1820                         }
1821                 }
1822         
1823                 /* write tangent to layer */
1824                 for(i=0, tf=mtface, mf=mface; i < totface; mf++, tf++, i++, tangent+=4) {
1825                         len= (mf->v4)? 4 : 3; 
1826
1827                         if(mtface == NULL) {
1828                                 map_to_sphere( &uv[0][0], &uv[0][1],orco[mf->v1][0], orco[mf->v1][1], orco[mf->v1][2]);
1829                                 map_to_sphere( &uv[1][0], &uv[1][1],orco[mf->v2][0], orco[mf->v2][1], orco[mf->v2][2]);
1830                                 map_to_sphere( &uv[2][0], &uv[2][1],orco[mf->v3][0], orco[mf->v3][1], orco[mf->v3][2]);
1831                                 if(len==4)
1832                                         map_to_sphere( &uv[3][0], &uv[3][1],orco[mf->v4][0], orco[mf->v4][1], orco[mf->v4][2]);
1833                         }
1834                 
1835                         mf_vi[0]= mf->v1;
1836                         mf_vi[1]= mf->v2;
1837                         mf_vi[2]= mf->v3;
1838                         mf_vi[3]= mf->v4;
1839                 
1840                         for(j=0; j<len; j++) {
1841                                 vtang= find_vertex_tangent(vtangents[mf_vi[j]], mtface ? tf->uv[j] : uv[j]);
1842                                 normalize_v3_v3(tangent[j], vtang);
1843                                 ((float *) tangent[j])[3]=1.0f;
1844                         }
1845                 }
1846         }
1847         
1848         BLI_memarena_free(arena);
1849         MEM_freeN(vtangents);
1850 }
1851
1852 void DM_calc_auto_bump_scale(DerivedMesh *dm)
1853 {
1854         /* int totvert= dm->getNumVerts(dm); */ /* UNUSED */
1855         int totface= dm->getNumFaces(dm);
1856
1857         MVert * mvert = dm->getVertArray(dm);
1858         MFace * mface = dm->getFaceArray(dm);
1859         MTFace * mtface = dm->getFaceDataArray(dm, CD_MTFACE);
1860
1861         if(mtface)
1862         {
1863                 double dsum = 0.0;
1864                 int nr_accumulated = 0;
1865                 int f;
1866
1867                 for ( f=0; f<totface; f++ )
1868                 {
1869                         {
1870                                 float * verts[4], * tex_coords[4];
1871                                 const int nr_verts = mface[f].v4!=0 ? 4 : 3;
1872                                 int i, is_degenerate;
1873
1874                                 verts[0]=mvert[mface[f].v1].co; verts[1]=mvert[mface[f].v2].co; verts[2]=mvert[mface[f].v3].co;
1875                                 tex_coords[0]=mtface[f].uv[0]; tex_coords[1]=mtface[f].uv[1]; tex_coords[2]=mtface[f].uv[2];
1876                                 if(nr_verts==4)
1877                                 {
1878                                         verts[3]=mvert[mface[f].v4].co;
1879                                         tex_coords[3]=mtface[f].uv[3];
1880                                 }
1881
1882                                 // discard degenerate faces
1883                                 is_degenerate = 0;
1884                                 if(     equals_v3v3(verts[0], verts[1]) || equals_v3v3(verts[0], verts[2]) || equals_v3v3(verts[1], verts[2]) ||
1885                                         equals_v2v2(tex_coords[0], tex_coords[1]) || equals_v2v2(tex_coords[0], tex_coords[2]) || equals_v2v2(tex_coords[1], tex_coords[2]) )
1886                                 {
1887                                         is_degenerate = 1;
1888                                 }
1889
1890                                 // verify last vertex as well if this is a quad
1891                                 if ( is_degenerate==0 && nr_verts==4 )
1892                                 {
1893                                         if(     equals_v3v3(verts[3], verts[0]) || equals_v3v3(verts[3], verts[1]) || equals_v3v3(verts[3], verts[2]) ||
1894                                                 equals_v2v2(tex_coords[3], tex_coords[0]) || equals_v2v2(tex_coords[3], tex_coords[1]) || equals_v2v2(tex_coords[3], tex_coords[2]) )
1895                                         {
1896                                                 is_degenerate = 1;
1897                                         }
1898
1899                                         // verify the winding is consistent
1900                                         if ( is_degenerate==0 )
1901                                         {
1902                                                 float prev_edge[2];
1903                                                 int is_signed = 0;
1904                                                 sub_v2_v2v2(prev_edge, tex_coords[0], tex_coords[3]);
1905
1906                                                 i = 0;
1907                                                 while ( is_degenerate==0 && i<4 )
1908                                                 {
1909                                                         float cur_edge[2], signed_area;
1910                                                         sub_v2_v2v2(cur_edge, tex_coords[(i+1)&0x3], tex_coords[i]);
1911                                                         signed_area = prev_edge[0]*cur_edge[1] - prev_edge[1]*cur_edge[0];
1912                                                         if ( i==0 ) is_signed = signed_area<0.0f ? 1 : 0;
1913                                                         else if((is_signed!=0)!=(signed_area<0.0f)) is_degenerate=1;
1914
1915                                                         if ( is_degenerate==0 )
1916                                                         {
1917                                                                 copy_v2_v2(prev_edge, cur_edge);
1918                                                                 ++i;
1919                                                         }
1920                                                 }
1921                                         }
1922                                 }
1923
1924                                 // proceed if not a degenerate face
1925                                 if ( is_degenerate==0 )
1926                                 {
1927                                         int nr_tris_to_pile=0;
1928                                         // quads split at shortest diagonal
1929                                         int offs = 0;           // initial triangulation is 0,1,2 and 0, 2, 3
1930                                         if ( nr_verts==4 )
1931                                         {
1932                                                 float pos_len_diag0, pos_len_diag1;
1933                                                 float vtmp[3];
1934                                                 sub_v3_v3v3(vtmp, verts[2], verts[0]);
1935                                                 pos_len_diag0 = dot_v3v3(vtmp, vtmp);
1936                                                 sub_v3_v3v3(vtmp, verts[3], verts[1]);
1937                                                 pos_len_diag1 = dot_v3v3(vtmp, vtmp);
1938
1939                                                 if(pos_len_diag1<pos_len_diag0)
1940                                                         offs=1;         // alter split
1941                                                 else if(pos_len_diag0==pos_len_diag1)           // do UV check instead
1942                                                 {
1943                                                         float tex_len_diag0, tex_len_diag1;
1944
1945                                                         sub_v2_v2v2(vtmp, tex_coords[2], tex_coords[0]);
1946                                                         tex_len_diag0 = dot_v2v2(vtmp, vtmp);
1947                                                         sub_v2_v2v2(vtmp, tex_coords[3], tex_coords[1]);
1948                                                         tex_len_diag1 = dot_v2v2(vtmp, vtmp);
1949
1950                                                         if(tex_len_diag1<tex_len_diag0)
1951                                                         {
1952                                                                 offs=1;         // alter split
1953                                                         }
1954                                                 }
1955                                         }
1956                                         nr_tris_to_pile = nr_verts-2 ;
1957                                         if ( nr_tris_to_pile==1 || nr_tris_to_pile==2 )
1958                                         {
1959                                                 const int indices[] = {offs+0, offs+1, offs+2, offs+0, offs+2, (offs+3)&0x3 };
1960                                                 int t;
1961                                                 for ( t=0; t<nr_tris_to_pile; t++ )
1962                                                 {
1963                                                         float f2x_area_uv;
1964                                                         float * p0 = verts[indices[t*3+0]];
1965                                                         float * p1 = verts[indices[t*3+1]];
1966                                                         float * p2 = verts[indices[t*3+2]];
1967
1968                                                         float edge_t0[2], edge_t1[2];
1969                                                         sub_v2_v2v2(edge_t0, tex_coords[indices[t*3+1]], tex_coords[indices[t*3+0]]);
1970                                                         sub_v2_v2v2(edge_t1, tex_coords[indices[t*3+2]], tex_coords[indices[t*3+0]]);
1971
1972                                                         f2x_area_uv = fabsf(edge_t0[0]*edge_t1[1] - edge_t0[1]*edge_t1[0]);
1973                                                         if ( f2x_area_uv>FLT_EPSILON )
1974                                                         {
1975                                                                 float norm[3], v0[3], v1[3], f2x_surf_area, fsurf_ratio;
1976                                                                 sub_v3_v3v3(v0, p1, p0);
1977                                                                 sub_v3_v3v3(v1, p2, p0);
1978                                                                 cross_v3_v3v3(norm, v0, v1);
1979
1980                                                                 f2x_surf_area = len_v3(norm);
1981                                                                 fsurf_ratio = f2x_surf_area/f2x_area_uv;        // tri area divided by texture area
1982
1983                                                                 ++nr_accumulated;
1984                                                                 dsum += (double)(fsurf_ratio);
1985                                                         }
1986                                                 }
1987                                         }
1988                                 }
1989                         }
1990                 }
1991
1992                 // finalize
1993                 {
1994                         const float avg_area_ratio = (nr_accumulated>0) ? ((float)(dsum / nr_accumulated)) : 1.0f;
1995                         const float use_as_render_bump_scale = sqrtf(avg_area_ratio);           // use width of average surface ratio as your bump scale
1996                         dm->auto_bump_scale = use_as_render_bump_scale;
1997                 }
1998         }
1999         else
2000         {
2001                 dm->auto_bump_scale = 1.0f;
2002         }
2003 }
2004
2005 void DM_vertex_attributes_from_gpu(DerivedMesh *dm, GPUVertexAttribs *gattribs, DMVertexAttribs *attribs)
2006 {
2007         CustomData *vdata, *fdata, *tfdata = NULL;
2008         int a, b, layer;
2009
2010         /* From the layers requested by the GLSL shader, figure out which ones are
2011          * actually available for this derivedmesh, and retrieve the pointers */
2012
2013         memset(attribs, 0, sizeof(DMVertexAttribs));
2014
2015         vdata = &dm->vertData;
2016         fdata = &dm->faceData;
2017
2018         /* ugly hack, editmesh derivedmesh doesn't copy face data, this way we
2019          * can use offsets instead */
2020         if(dm->type == DM_TYPE_EDITMESH)
2021                 tfdata = &((EditMeshDerivedMesh*)dm)->em->fdata;
2022         else
2023                 tfdata = fdata;
2024
2025         /* calc auto bump scale if necessary */
2026         if(dm->auto_bump_scale<=0.0f)
2027                 DM_calc_auto_bump_scale(dm);
2028
2029         /* add a tangent layer if necessary */
2030         for(b = 0; b < gattribs->totlayer; b++)
2031                 if(gattribs->layer[b].type == CD_TANGENT)
2032                         if(CustomData_get_layer_index(fdata, CD_TANGENT) == -1)
2033                                 DM_add_tangent_layer(dm);
2034
2035         for(b = 0; b < gattribs->totlayer; b++) {
2036                 if(gattribs->layer[b].type == CD_MTFACE) {
2037                         /* uv coordinates */
2038                         if(gattribs->layer[b].name[0])
2039                                 layer = CustomData_get_named_layer_index(tfdata, CD_MTFACE,
2040                                         gattribs->layer[b].name);
2041                         else
2042                                 layer = CustomData_get_active_layer_index(tfdata, CD_MTFACE);
2043
2044                         if(layer != -1) {
2045                                 a = attribs->tottface++;
2046
2047                                 attribs->tface[a].array = tfdata->layers[layer].data;
2048                                 attribs->tface[a].emOffset = tfdata->layers[layer].offset;
2049                                 attribs->tface[a].glIndex = gattribs->layer[b].glindex;
2050                                 attribs->tface[a].glTexco = gattribs->layer[b].gltexco;
2051                         }
2052                 }
2053                 else if(gattribs->layer[b].type == CD_MCOL) {
2054                         /* vertex colors */
2055                         if(gattribs->layer[b].name[0])
2056                                 layer = CustomData_get_named_layer_index(tfdata, CD_MCOL,
2057                                         gattribs->layer[b].name);
2058                         else
2059                                 layer = CustomData_get_active_layer_index(tfdata, CD_MCOL);
2060
2061                         if(layer != -1) {
2062                                 a = attribs->totmcol++;
2063
2064                                 attribs->mcol[a].array = tfdata->layers[layer].data;
2065                                 attribs->mcol[a].emOffset = tfdata->layers[layer].offset;
2066                                 attribs->mcol[a].glIndex = gattribs->layer[b].glindex;
2067                         }
2068                 }
2069                 else if(gattribs->layer[b].type == CD_TANGENT) {
2070                         /* tangents */
2071                         layer = CustomData_get_layer_index(fdata, CD_TANGENT);
2072
2073                         if(layer != -1) {
2074                                 attribs->tottang = 1;
2075
2076                                 attribs->tang.array = fdata->layers[layer].data;
2077                                 attribs->tang.emOffset = fdata->layers[layer].offset;
2078                                 attribs->tang.glIndex = gattribs->layer[b].glindex;
2079                         }
2080                 }
2081                 else if(gattribs->layer[b].type == CD_ORCO) {
2082                         /* original coordinates */
2083                         layer = CustomData_get_layer_index(vdata, CD_ORCO);
2084
2085                         if(layer != -1) {
2086                                 attribs->totorco = 1;
2087
2088                                 attribs->orco.array = vdata->layers[layer].data;
2089                                 attribs->orco.emOffset = vdata->layers[layer].offset;
2090                                 attribs->orco.glIndex = gattribs->layer[b].glindex;
2091                                 attribs->orco.glTexco = gattribs->layer[b].gltexco;
2092                         }
2093                 }
2094         }
2095 }
2096
2097 /* Set object's bounding box based on DerivedMesh min/max data */
2098 void DM_set_object_boundbox(Object *ob, DerivedMesh *dm)
2099 {
2100         float min[3], max[3];
2101
2102         INIT_MINMAX(min, max);
2103
2104         dm->getMinMax(dm, min, max);
2105
2106         if(!ob->bb)
2107                 ob->bb= MEM_callocN(sizeof(BoundBox), "DM-BoundBox");
2108
2109         boundbox_set_from_min_max(ob->bb, min, max);
2110 }
2111
2112 /* --- NAVMESH (begin) --- */
2113 #ifdef WITH_GAMEENGINE
2114
2115 BM_INLINE int navmesh_bit(int a, int b)
2116 {
2117         return (a & (1 << b)) >> b;
2118 }
2119
2120 BM_INLINE void navmesh_intToCol(int i, float col[3])
2121 {
2122         int     r = navmesh_bit(i, 0) + navmesh_bit(i, 3) * 2 + 1;
2123         int     g = navmesh_bit(i, 1) + navmesh_bit(i, 4) * 2 + 1;
2124         int     b = navmesh_bit(i, 2) + navmesh_bit(i, 5) * 2 + 1;
2125         col[0] = 1 - r*63.0f/255.0f;
2126         col[1] = 1 - g*63.0f/255.0f;
2127         col[2] = 1 - b*63.0f/255.0f;
2128 }
2129
2130 static void navmesh_drawColored(DerivedMesh *dm)
2131 {
2132         int a, glmode;
2133         MVert *mvert = (MVert *)CustomData_get_layer(&dm->vertData, CD_MVERT);
2134         MFace *mface = (MFace *)CustomData_get_layer(&dm->faceData, CD_MFACE);
2135         int *polygonIdx = (int *)CustomData_get_layer(&dm->faceData, CD_RECAST);
2136         float col[3];
2137
2138         if (!polygonIdx)
2139                 return;
2140
2141         /*
2142         //UI_ThemeColor(TH_WIRE);
2143         glDisable(GL_LIGHTING);
2144         glLineWidth(2.0);
2145         dm->drawEdges(dm, 0, 1);
2146         glLineWidth(1.0);
2147         glEnable(GL_LIGHTING);*/
2148
2149         glDisable(GL_LIGHTING);
2150         /*  if(GPU_buffer_legacy(dm) ) */ { /* TODO - VBO draw code, not high priority - campbell */
2151                 DEBUG_VBO( "Using legacy code. drawNavMeshColored\n" );
2152                 //glShadeModel(GL_SMOOTH);
2153                 glBegin(glmode = GL_QUADS);
2154                 for(a = 0; a < dm->numFaceData; a++, mface++) {
2155                         int new_glmode = mface->v4?GL_QUADS:GL_TRIANGLES;
2156                         int pi = polygonIdx[a];
2157                         if (pi <= 0) {
2158                                 zero_v3(col);
2159                         }
2160                         else {
2161                                 navmesh_intToCol(pi, col);
2162                         }
2163
2164                         if(new_glmode != glmode) {
2165                                 glEnd();
2166                                 glBegin(glmode = new_glmode);
2167                         }
2168                         glColor3fv(col);
2169                         glVertex3fv(mvert[mface->v1].co);
2170                         glVertex3fv(mvert[mface->v2].co);
2171                         glVertex3fv(mvert[mface->v3].co);
2172                         if(mface->v4) {
2173                                 glVertex3fv(mvert[mface->v4].co);
2174                         }
2175                 }
2176                 glEnd();
2177         }
2178         glEnable(GL_LIGHTING);
2179 }
2180
2181 static void navmesh_DM_drawFacesTex(DerivedMesh *dm,
2182                         int (*setDrawOptions)(MTFace *tface, int has_mcol, int matnr),
2183                         int (*compareDrawOptions)(void *userData, int cur_index, int next_index),
2184                         void *userData)
2185 {
2186         (void) setDrawOptions;
2187         (void) compareDrawOptions;
2188         (void) userData;
2189
2190         navmesh_drawColored(dm);
2191 }
2192
2193 static void navmesh_DM_drawFacesSolid(DerivedMesh *dm,
2194                                       float (*partial_redraw_planes)[4],
2195                                       int UNUSED(fast), int (*setMaterial)(int, void *attribs))
2196 {
2197         (void) partial_redraw_planes;
2198         (void) setMaterial;
2199
2200         //drawFacesSolid_original(dm, partial_redraw_planes, fast, setMaterial);
2201         navmesh_drawColored(dm);
2202 }
2203
2204 static DerivedMesh *navmesh_dm_createNavMeshForVisualization(DerivedMesh *dm)
2205 {
2206         DerivedMesh *result;
2207         int maxFaces = dm->getNumFaces(dm);
2208         int *recastData;
2209         int vertsPerPoly=0, nverts=0, ndtris=0, npolys=0;
2210         float* verts=NULL;
2211         unsigned short *dtris=NULL, *dmeshes=NULL, *polys=NULL;
2212         int *dtrisToPolysMap=NULL, *dtrisToTrisMap=NULL, *trisToFacesMap=NULL;
2213         int res;
2214
2215         result = CDDM_copy(dm);
2216         if (!CustomData_has_layer(&result->faceData, CD_RECAST)) {
2217                 int *sourceRecastData = (int*)CustomData_get_layer(&dm->faceData, CD_RECAST);
2218                 if (sourceRecastData) {
2219                         CustomData_add_layer_named(&result->faceData, CD_RECAST, CD_DUPLICATE,
2220                                                    sourceRecastData, maxFaces, "recastData");
2221                 }
2222         }
2223         recastData = (int*)CustomData_get_layer(&result->faceData, CD_RECAST);
2224
2225         /* note: This is not good design! - really should not be doing this */
2226         result->drawFacesTex =  navmesh_DM_drawFacesTex;
2227         result->drawFacesSolid = navmesh_DM_drawFacesSolid;
2228
2229
2230         /* process mesh */
2231         res  = buildNavMeshDataByDerivedMesh(dm, &vertsPerPoly, &nverts, &verts, &ndtris, &dtris,
2232                                              &npolys, &dmeshes, &polys, &dtrisToPolysMap, &dtrisToTrisMap,
2233                                              &trisToFacesMap);
2234         if (res) {
2235                 size_t polyIdx;
2236
2237                 /* invalidate concave polygon */
2238                 for (polyIdx=0; polyIdx<(size_t)npolys; polyIdx++) {
2239                         unsigned short* poly = &polys[polyIdx*2*vertsPerPoly];
2240                         if (!polyIsConvex(poly, vertsPerPoly, verts)) {
2241                                 /* set negative polygon idx to all faces */
2242                                 unsigned short *dmesh = &dmeshes[4*polyIdx];
2243                                 unsigned short tbase = dmesh[2];
2244                                 unsigned short tnum = dmesh[3];
2245                                 unsigned short ti;
2246
2247                                 for (ti=0; ti<tnum; ti++) {
2248                                         unsigned short triidx = dtrisToTrisMap[tbase+ti];
2249                                         unsigned short faceidx = trisToFacesMap[triidx];
2250                                         if (recastData[faceidx] > 0) {
2251                                                 recastData[faceidx] = -recastData[faceidx];
2252                                         }
2253                                 }
2254                         }
2255                 }
2256         }
2257         else {
2258                 printf("Error during creation polygon infos\n");
2259         }
2260
2261         /* clean up */
2262         if (verts!=NULL)
2263                 MEM_freeN(verts);
2264         if (dtris!=NULL)
2265                 MEM_freeN(dtris);
2266         if (dmeshes!=NULL)
2267                 MEM_freeN(dmeshes);
2268         if (polys!=NULL)
2269                 MEM_freeN(polys);
2270         if (dtrisToPolysMap!=NULL)
2271                 MEM_freeN(dtrisToPolysMap);
2272         if (dtrisToTrisMap!=NULL)
2273                 MEM_freeN(dtrisToTrisMap);
2274         if (trisToFacesMap!=NULL)
2275                 MEM_freeN(trisToFacesMap);
2276
2277         return result;
2278 }
2279
2280 #endif /* WITH_GAMEENGINE */
2281
2282 /* --- NAVMESH (end) --- */