svn merge ^/trunk/blender -r44562:45364
[blender-staging.git] / source / blender / editors / mesh / mesh_navmesh.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) 2011 by Blender Foundation
19  * All rights reserved.
20  *
21  * The Original Code is: all of this file.
22  *
23  * Contributor(s): Benoit Bolsee,
24  *                 Nick Samarin
25  *
26  * ***** END GPL LICENSE BLOCK *****
27  */
28
29 #include <math.h>
30
31 #include "MEM_guardedalloc.h"
32
33 #include "DNA_scene_types.h"
34 #include "DNA_object_types.h"
35 #include "DNA_mesh_types.h"
36 #include "DNA_meshdata_types.h"
37 #include "DNA_modifier_types.h"
38 #include "DNA_ID.h"
39
40 #include "BLI_listbase.h"
41 #include "BLI_utildefines.h"
42 #include "BLI_math_vector.h"
43 #include "BLI_linklist.h"
44
45 #include "BKE_library.h"
46 #include "BKE_depsgraph.h"
47 #include "BKE_context.h"
48 #include "BKE_main.h"
49 #include "BKE_mesh.h"
50 #include "BKE_modifier.h"
51 #include "BKE_scene.h"
52 #include "BKE_DerivedMesh.h"
53 #include "BKE_cdderivedmesh.h"
54 #include "BKE_report.h"
55 #include "BKE_tessmesh.h"
56
57 #include "ED_object.h"
58 #include "ED_mesh.h"
59 #include "ED_screen.h"
60
61 #include "RNA_access.h"
62
63 #include "WM_api.h"
64 #include "WM_types.h"
65
66 #include "mesh_intern.h"
67 #include "recast-capi.h"
68
69 static void createVertsTrisData(bContext *C, LinkNode *obs, int *nverts_r, float **verts_r, int *ntris_r, int **tris_r)
70 {
71         MVert *mvert;
72         int nfaces = 0, *tri, i, curnverts, basenverts, curnfaces;
73         MFace *mface;
74         float co[3], wco[3];
75         Object *ob;
76         LinkNode *oblink, *dmlink;
77         DerivedMesh *dm;
78         Scene *scene = CTX_data_scene(C);
79         LinkNode *dms = NULL;
80
81         int nverts, ntris, *tris;
82         float *verts;
83
84         nverts = 0;
85         ntris = 0;
86
87         /* calculate number of verts and tris */
88         for (oblink = obs; oblink; oblink = oblink->next) {
89                 ob = (Object *) oblink->link;
90                 dm = mesh_create_derived_no_virtual(scene, ob, NULL, CD_MASK_MESH);
91                 BLI_linklist_append(&dms, (void *)dm);
92
93                 nverts += dm->getNumVerts(dm);
94                 nfaces = dm->getNumTessFaces(dm);
95                 ntris += nfaces;
96
97                 /* resolve quad faces */
98                 mface = dm->getTessFaceArray(dm);
99                 for (i = 0; i < nfaces; i++) {
100                         MFace *mf = &mface[i];
101                         if (mf->v4)
102                                 ntris += 1;
103                 }
104         }
105
106         /* create data */
107         verts = MEM_mallocN(sizeof(float) * 3 * nverts, "createVertsTrisData verts");
108         tris = MEM_mallocN(sizeof(int) * 3 * ntris, "createVertsTrisData faces");
109
110         basenverts = 0;
111         tri = tris;
112         for (oblink = obs, dmlink = dms; oblink && dmlink;
113              oblink = oblink->next, dmlink = dmlink->next)
114         {
115                 ob = (Object *) oblink->link;
116                 dm = (DerivedMesh *) dmlink->link;
117
118                 curnverts = dm->getNumVerts(dm);
119                 mvert = dm->getVertArray(dm);
120
121                 /* copy verts */
122                 for (i = 0; i < curnverts; i++) {
123                         MVert *v = &mvert[i];
124
125                         copy_v3_v3(co, v->co);
126                         mul_v3_m4v3(wco, ob->obmat, co);
127
128                         verts[3 * (basenverts + i) + 0] = wco[0];
129                         verts[3 * (basenverts + i) + 1] = wco[2];
130                         verts[3 * (basenverts + i) + 2] = wco[1];
131                 }
132
133                 /* create tris */
134                 curnfaces = dm->getNumTessFaces(dm);
135                 mface = dm->getTessFaceArray(dm);
136
137                 for (i = 0; i < curnfaces; i++) {
138                         MFace *mf = &mface[i];
139
140                         tri[0] = basenverts + mf->v1;
141                         tri[1] = basenverts + mf->v3;
142                         tri[2] = basenverts + mf->v2;
143                         tri += 3;
144
145                         if (mf->v4) {
146                                 tri[0] = basenverts + mf->v1;
147                                 tri[1] = basenverts + mf->v4;
148                                 tri[2] = basenverts + mf->v3;
149                                 tri += 3;
150                         }
151                 }
152
153                 basenverts += curnverts;
154         }
155
156         /* release derived mesh */
157         for (dmlink = dms; dmlink; dmlink = dmlink->next) {
158                 dm = (DerivedMesh *) dmlink->link;
159                 dm->release(dm);
160         }
161
162         BLI_linklist_free(dms, NULL);
163
164         *nverts_r = nverts;
165         *verts_r = verts;
166         *ntris_r = ntris;
167         *tris_r = tris;
168 }
169
170 static int buildNavMesh(const RecastData *recastParams, int nverts, float *verts, int ntris, int *tris,
171                         struct recast_polyMesh **pmesh, struct recast_polyMeshDetail **dmesh)
172 {
173         float bmin[3], bmax[3];
174         struct recast_heightfield *solid;
175         unsigned char *triflags;
176         struct recast_compactHeightfield *chf;
177         struct recast_contourSet *cset;
178         int width, height, walkableHeight, walkableClimb, walkableRadius;
179         int minRegionArea, mergeRegionArea, maxEdgeLen;
180         float detailSampleDist, detailSampleMaxError;
181
182         recast_calcBounds(verts, nverts, bmin, bmax);
183
184         /* ** Step 1. Initialize build config ** */
185         walkableHeight = (int)ceilf(recastParams->agentheight / recastParams->cellheight);
186         walkableClimb = (int)floorf(recastParams->agentmaxclimb / recastParams->cellheight);
187         walkableRadius = (int)ceilf(recastParams->agentradius / recastParams->cellsize);
188         minRegionArea = (int)(recastParams->regionminsize * recastParams->regionminsize);
189         mergeRegionArea = (int)(recastParams->regionmergesize * recastParams->regionmergesize);
190         maxEdgeLen = (int)(recastParams->edgemaxlen / recastParams->cellsize);
191         detailSampleDist = recastParams->detailsampledist < 0.9f ? 0 :
192                            recastParams->cellsize * recastParams->detailsampledist;
193         detailSampleMaxError = recastParams->cellheight * recastParams->detailsamplemaxerror;
194
195         /* Set the area where the navigation will be build. */
196         recast_calcGridSize(bmin, bmax, recastParams->cellsize, &width, &height);
197
198         /* ** Step 2: Rasterize input polygon soup ** */
199         /* Allocate voxel heightfield where we rasterize our input data to */
200         solid = recast_newHeightfield();
201
202         if (!recast_createHeightfield(solid, width, height, bmin, bmax, recastParams->cellsize, recastParams->cellheight)) {
203                 recast_destroyHeightfield(solid);
204
205                 return 0;
206         }
207
208         /* Allocate array that can hold triangle flags */
209         triflags = MEM_callocN(sizeof(unsigned char) * ntris, "buildNavMesh triflags");
210
211         /* Find triangles which are walkable based on their slope and rasterize them */
212         recast_markWalkableTriangles(RAD2DEG(recastParams->agentmaxslope), verts, nverts, tris, ntris, triflags);
213         recast_rasterizeTriangles(verts, nverts, tris, triflags, ntris, solid);
214         MEM_freeN(triflags);
215
216         /* ** Step 3: Filter walkables surfaces ** */
217         recast_filterLowHangingWalkableObstacles(walkableClimb, solid);
218         recast_filterLedgeSpans(walkableHeight, walkableClimb, solid);
219         recast_filterWalkableLowHeightSpans(walkableHeight, solid);
220
221         /* ** Step 4: Partition walkable surface to simple regions ** */
222
223         chf = recast_newCompactHeightfield();
224         if (!recast_buildCompactHeightfield(walkableHeight, walkableClimb, solid, chf)) {
225                 recast_destroyHeightfield(solid);
226                 recast_destroyCompactHeightfield(chf);
227
228                 return 0;
229         }
230
231         recast_destroyHeightfield(solid);
232         solid = NULL;
233
234         if (!recast_erodeWalkableArea(walkableRadius, chf)) {
235                 recast_destroyCompactHeightfield(chf);
236
237                 return 0;
238         }
239
240         /* Prepare for region partitioning, by calculating distance field along the walkable surface */
241         if (!recast_buildDistanceField(chf)) {
242                 recast_destroyCompactHeightfield(chf);
243
244                 return 0;
245         }
246
247         /* Partition the walkable surface into simple regions without holes */
248         if (!recast_buildRegions(chf, 0, minRegionArea, mergeRegionArea)) {
249                 recast_destroyCompactHeightfield(chf);
250
251                 return 0;
252         }
253
254         /* ** Step 5: Trace and simplify region contours ** */
255         /* Create contours */
256         cset = recast_newContourSet();
257
258         if (!recast_buildContours(chf, recastParams->edgemaxerror, maxEdgeLen, cset)) {
259                 recast_destroyCompactHeightfield(chf);
260                 recast_destroyContourSet(cset);
261
262                 return 0;
263         }
264
265         /* ** Step 6: Build polygons mesh from contours ** */
266         *pmesh = recast_newPolyMesh();
267         if (!recast_buildPolyMesh(cset, recastParams->vertsperpoly, *pmesh)) {
268                 recast_destroyCompactHeightfield(chf);
269                 recast_destroyContourSet(cset);
270                 recast_destroyPolyMesh(*pmesh);
271
272                 return 0;
273         }
274
275
276         /* ** Step 7: Create detail mesh which allows to access approximate height on each polygon ** */
277
278         *dmesh = recast_newPolyMeshDetail();
279         if (!recast_buildPolyMeshDetail(*pmesh, chf, detailSampleDist, detailSampleMaxError, *dmesh)) {
280                 recast_destroyCompactHeightfield(chf);
281                 recast_destroyContourSet(cset);
282                 recast_destroyPolyMesh(*pmesh);
283                 recast_destroyPolyMeshDetail(*dmesh);
284
285                 return 0;
286         }
287
288         recast_destroyCompactHeightfield(chf);
289         recast_destroyContourSet(cset);
290
291         return 1;
292 }
293
294 static Object *createRepresentation(bContext *C, struct recast_polyMesh *pmesh, struct recast_polyMeshDetail *dmesh, Base *base)
295 {
296         float co[3], rot[3];
297         BMEditMesh *em;
298         int i, j, k;
299         unsigned short *v;
300         int face[3];
301         Scene *scene = CTX_data_scene(C);
302         Object *obedit;
303         int createob = base == NULL;
304         int nverts, nmeshes, nvp;
305         unsigned short *verts, *polys;
306         unsigned int *meshes;
307         float bmin[3], cs, ch, *dverts;
308         unsigned char *tris;
309
310         zero_v3(co);
311         zero_v3(rot);
312
313         if (createob) {
314                 /* create new object */
315                 obedit = ED_object_add_type(C, OB_MESH, co, rot, FALSE, 1);
316         }
317         else {
318                 obedit = base->object;
319                 scene_select_base(scene, base);
320                 copy_v3_v3(obedit->loc, co);
321                 copy_v3_v3(obedit->rot, rot);
322         }
323
324         ED_object_enter_editmode(C, EM_DO_UNDO | EM_IGNORE_LAYER);
325         em = BMEdit_FromObject(obedit);
326
327         if (!createob) {
328                 /* clear */
329                 EDBM_mesh_clear(em);
330         }
331
332         /* create verts for polygon mesh */
333         verts = recast_polyMeshGetVerts(pmesh, &nverts);
334         recast_polyMeshGetBoundbox(pmesh, bmin, NULL);
335         recast_polyMeshGetCell(pmesh, &cs, &ch);
336
337         for (i = 0; i < nverts; i++) {
338                 v = &verts[3 * i];
339                 co[0] = bmin[0] + v[0] * cs;
340                 co[1] = bmin[1] + v[1] * ch;
341                 co[2] = bmin[2] + v[2] * cs;
342                 SWAP(float, co[1], co[2]);
343                 BM_vert_create(em->bm, co, NULL);
344         }
345
346         /* create custom data layer to save polygon idx */
347         CustomData_add_layer_named(&em->bm->pdata, CD_RECAST, CD_CALLOC, NULL, 0, "createRepresentation recastData");
348         
349         /* create verts and faces for detailed mesh */
350         meshes = recast_polyMeshDetailGetMeshes(dmesh, &nmeshes);
351         polys = recast_polyMeshGetPolys(pmesh, NULL, &nvp);
352         dverts = recast_polyMeshDetailGetVerts(dmesh, NULL);
353         tris = recast_polyMeshDetailGetTris(dmesh, NULL);
354
355         for (i = 0; i < nmeshes; i++) {
356                 int uniquevbase = em->bm->totvert;
357                 unsigned int vbase = meshes[4 * i + 0];
358                 unsigned short ndv = meshes[4 * i + 1];
359                 unsigned short tribase = meshes[4 * i + 2];
360                 unsigned short trinum = meshes[4 * i + 3];
361                 const unsigned short *p = &polys[i * nvp * 2];
362                 int nv = 0;
363
364                 for (j = 0; j < nvp; ++j) {
365                         if (p[j] == 0xffff) break;
366                         nv++;
367                 }
368
369                 /* create unique verts  */
370                 for (j = nv; j < ndv; j++) {
371                         copy_v3_v3(co, &dverts[3 * (vbase + j)]);
372                         SWAP(float, co[1], co[2]);
373                         BM_vert_create(em->bm, co, NULL);
374                 }
375
376                 EDBM_index_arrays_init(em, 1, 0, 0);
377
378                 /* create faces */
379                 for (j = 0; j < trinum; j++) {
380                         unsigned char *tri = &tris[4 * (tribase + j)];
381                         BMFace *newFace;
382                         int *polygonIdx;
383
384                         for (k = 0; k < 3; k++) {
385                                 if (tri[k] < nv)
386                                         face[k] = p[tri[k]];  /* shared vertex */
387                                 else
388                                         face[k] = uniquevbase + tri[k] - nv;  /* unique vertex */
389                         }
390                         newFace = BM_face_create_quad_tri(em->bm,
391                                                           EDBM_vert_at_index(em, face[0]),
392                                                           EDBM_vert_at_index(em, face[2]),
393                                                           EDBM_vert_at_index(em, face[1]), NULL,
394                                                           NULL, FALSE);
395
396                         /* set navigation polygon idx to the custom layer */
397                         polygonIdx = (int *)CustomData_bmesh_get(&em->bm->pdata, newFace->head.data, CD_RECAST);
398                         *polygonIdx = i + 1; /* add 1 to avoid zero idx */
399                 }
400                 
401                 EDBM_index_arrays_free(em);
402         }
403
404         recast_destroyPolyMesh(pmesh);
405         recast_destroyPolyMeshDetail(dmesh);
406
407         DAG_id_tag_update((ID *)obedit->data, OB_RECALC_DATA);
408         WM_event_add_notifier(C, NC_GEOM | ND_DATA, obedit->data);
409
410
411         ED_object_exit_editmode(C, EM_FREEDATA); 
412         WM_event_add_notifier(C, NC_OBJECT | ND_DRAW, obedit);
413
414         if (createob) {
415                 obedit->gameflag &= ~OB_COLLISION;
416                 obedit->gameflag |= OB_NAVMESH;
417                 obedit->body_type = OB_BODY_TYPE_NAVMESH;
418                 rename_id((ID *)obedit, "Navmesh");
419         }
420
421         BKE_mesh_ensure_navmesh(obedit->data);
422
423         return obedit;
424 }
425
426 static int navmesh_create_exec(bContext *C, wmOperator *op)
427 {
428         Scene *scene = CTX_data_scene(C);
429         LinkNode *obs = NULL;
430         Base *navmeshBase = NULL;
431
432         CTX_DATA_BEGIN(C, Base*, base, selected_editable_bases) {
433                 if (base->object->type == OB_MESH) {
434                         if (base->object->body_type == OB_BODY_TYPE_NAVMESH) {
435                                 if (!navmeshBase || base == scene->basact) {
436                                         navmeshBase = base;
437                                 }
438                         }
439                         else {
440                                 BLI_linklist_append(&obs, (void *)base->object);
441                         }
442                 }
443         }
444         CTX_DATA_END;
445
446         if (obs) {
447                 struct recast_polyMesh *pmesh = NULL;
448                 struct recast_polyMeshDetail *dmesh = NULL;
449
450                 int nverts = 0, ntris = 0;
451                 int *tris = 0;
452                 float *verts = NULL;
453
454                 createVertsTrisData(C, obs, &nverts, &verts, &ntris, &tris);
455                 BLI_linklist_free(obs, NULL);
456                 buildNavMesh(&scene->gm.recastData, nverts, verts, ntris, tris, &pmesh, &dmesh);
457                 createRepresentation(C, pmesh, dmesh, navmeshBase);
458
459                 MEM_freeN(verts);
460                 MEM_freeN(tris);
461
462                 return OPERATOR_FINISHED;
463         }
464         else {
465                 BKE_report(op->reports, RPT_ERROR, "No mesh objects found");
466
467                 return OPERATOR_CANCELLED;
468         }
469 }
470
471 void MESH_OT_navmesh_make(wmOperatorType *ot)
472 {
473         /* identifiers */
474         ot->name = "Create navigation mesh";
475         ot->description = "Create navigation mesh for selected objects";
476         ot->idname = "MESH_OT_navmesh_make";
477
478         /* api callbacks */
479         ot->exec = navmesh_create_exec;
480
481         /* flags */
482         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
483 }
484
485 static int navmesh_face_copy_exec(bContext *C, wmOperator *op)
486 {
487         Object *obedit = CTX_data_edit_object(C);
488         BMEditMesh *em = BMEdit_FromObject(obedit);
489
490         /* do work here */
491         BMFace *efa_act = BM_active_face_get(em->bm, FALSE);
492
493         if (efa_act) {
494                 if (CustomData_has_layer(&em->bm->pdata, CD_RECAST)) {
495                         BMFace *efa;
496                         BMIter iter;
497                         int targetPolyIdx = *(int *)CustomData_bmesh_get(&em->bm->pdata, efa_act->head.data, CD_RECAST);
498                         targetPolyIdx = targetPolyIdx >= 0 ? targetPolyIdx : -targetPolyIdx;
499
500                         if (targetPolyIdx > 0) {
501                                 /* set target poly idx to other selected faces */
502                                 BM_ITER(efa, &iter, em->bm, BM_FACES_OF_MESH, NULL) {
503                                         if (BM_elem_flag_test(efa, BM_ELEM_SELECT) && efa != efa_act) {
504                                                 int *recastDataBlock = (int *)CustomData_bmesh_get(&em->bm->pdata, efa->head.data, CD_RECAST);
505                                                 *recastDataBlock = targetPolyIdx;
506                                         }
507                                 }
508                         }
509                         else {
510                                 BKE_report(op->reports, RPT_ERROR, "Active face has no index set");
511                         }
512                 }
513         }
514
515         DAG_id_tag_update((ID *)obedit->data, OB_RECALC_DATA);
516         WM_event_add_notifier(C, NC_GEOM | ND_DATA, obedit->data);
517
518         return OPERATOR_FINISHED;
519 }
520
521 void MESH_OT_navmesh_face_copy(struct wmOperatorType *ot)
522 {
523         /* identifiers */
524         ot->name = "NavMesh Copy Face Index";
525         ot->description = "Copy the index from the active face";
526         ot->idname = "MESH_OT_navmesh_face_copy";
527
528         /* api callbacks */
529         ot->poll = ED_operator_editmesh;
530         ot->exec = navmesh_face_copy_exec;
531
532         /* flags */
533         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
534 }
535
536 static int compare(const void *a, const void *b)
537 {
538         return (*(int *)a - *(int *)b);
539 }
540
541 static int findFreeNavPolyIndex(BMEditMesh *em)
542 {
543         /* construct vector of indices */
544         int numfaces = em->bm->totface;
545         int *indices = MEM_callocN(sizeof(int) * numfaces, "findFreeNavPolyIndex(indices)");
546         BMFace *ef;
547         BMIter iter;
548         int i, idx = em->bm->totface - 1, freeIdx = 1;
549
550         /*XXX this originally went last to first, but that isn't possible anymore*/
551         BM_ITER(ef, &iter, em->bm, BM_FACES_OF_MESH, NULL) {
552                 int polyIdx = *(int *)CustomData_bmesh_get(&em->bm->pdata, ef->head.data, CD_RECAST);
553                 indices[idx] = polyIdx;
554                 idx--;
555         }
556
557         qsort(indices, numfaces, sizeof(int), compare);
558
559         /* search first free index */
560         freeIdx = 1;
561         for (i = 0; i < numfaces; i++) {
562                 if (indices[i] == freeIdx)
563                         freeIdx++;
564                 else if (indices[i] > freeIdx)
565                         break;
566         }
567
568         MEM_freeN(indices);
569
570         return freeIdx;
571 }
572
573 static int navmesh_face_add_exec(bContext *C, wmOperator *UNUSED(op))
574 {
575         Object *obedit = CTX_data_edit_object(C);
576         BMEditMesh *em = BMEdit_FromObject(obedit);
577         BMFace *ef;
578         BMIter iter;
579         
580         if (CustomData_has_layer(&em->bm->pdata, CD_RECAST)) {
581                 int targetPolyIdx = findFreeNavPolyIndex(em);
582
583                 if (targetPolyIdx > 0) {
584                         /* set target poly idx to selected faces */
585                         /*XXX this originally went last to first, but that isn't possible anymore*/
586                         
587                         BM_ITER(ef, &iter, em->bm, BM_FACES_OF_MESH, NULL) {
588                                 if (BM_elem_flag_test(ef, BM_ELEM_SELECT)) {
589                                         int *recastDataBlock = (int *)CustomData_bmesh_get(&em->bm->pdata, ef->head.data, CD_RECAST);
590                                         *recastDataBlock = targetPolyIdx;
591                                 }
592                         }
593                 }
594         }
595
596         DAG_id_tag_update((ID *)obedit->data, OB_RECALC_DATA);
597         WM_event_add_notifier(C, NC_GEOM | ND_DATA, obedit->data);
598
599         return OPERATOR_FINISHED;
600 }
601
602 void MESH_OT_navmesh_face_add(struct wmOperatorType *ot)
603 {
604         /* identifiers */
605         ot->name = "NavMesh New Face Index";
606         ot->description = "Add a new index and assign it to selected faces";
607         ot->idname = "MESH_OT_navmesh_face_add";
608
609         /* api callbacks */
610         ot->poll = ED_operator_editmesh;
611         ot->exec = navmesh_face_add_exec;
612
613         /* flags */
614         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
615 }
616
617 static int navmesh_obmode_data_poll(bContext *C)
618 {
619         Object *ob = ED_object_active_context(C);
620         if (ob && (ob->mode == OB_MODE_OBJECT) && (ob->type == OB_MESH)) {
621                 Mesh *me = ob->data;
622                 return CustomData_has_layer(&me->pdata, CD_RECAST);
623         }
624         return FALSE;
625 }
626
627 static int navmesh_obmode_poll(bContext *C)
628 {
629         Object *ob = ED_object_active_context(C);
630         if (ob && (ob->mode == OB_MODE_OBJECT) && (ob->type == OB_MESH)) {
631                 return TRUE;
632         }
633         return FALSE;
634 }
635
636 static int navmesh_reset_exec(bContext *C, wmOperator *UNUSED(op))
637 {
638         Object *ob = ED_object_active_context(C);
639         Mesh *me = ob->data;
640
641         CustomData_free_layers(&me->pdata, CD_RECAST, me->totpoly);
642
643         BKE_mesh_ensure_navmesh(me);
644
645         DAG_id_tag_update(&me->id, OB_RECALC_DATA);
646         WM_event_add_notifier(C, NC_GEOM | ND_DATA, &me->id);
647
648         return OPERATOR_FINISHED;
649 }
650
651 void MESH_OT_navmesh_reset(struct wmOperatorType *ot)
652 {
653         /* identifiers */
654         ot->name = "NavMesh Reset Index Values";
655         ot->description = "Assign a new index to every face";
656         ot->idname = "MESH_OT_navmesh_reset";
657
658         /* api callbacks */
659         ot->poll = navmesh_obmode_poll;
660         ot->exec = navmesh_reset_exec;
661
662         /* flags */
663         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
664 }
665
666 static int navmesh_clear_exec(bContext *C, wmOperator *UNUSED(op))
667 {
668         Object *ob = ED_object_active_context(C);
669         Mesh *me = ob->data;
670
671         CustomData_free_layers(&me->pdata, CD_RECAST, me->totpoly);
672
673         DAG_id_tag_update(&me->id, OB_RECALC_DATA);
674         WM_event_add_notifier(C, NC_GEOM | ND_DATA, &me->id);
675
676         return OPERATOR_FINISHED;
677 }
678
679 void MESH_OT_navmesh_clear(struct wmOperatorType *ot)
680 {
681         /* identifiers */
682         ot->name = "NavMesh Clear Data";
683         ot->description = "Remove navmesh data from this mesh";
684         ot->idname = "MESH_OT_navmesh_clear";
685
686         /* api callbacks */
687         ot->poll = navmesh_obmode_data_poll;
688         ot->exec = navmesh_clear_exec;
689
690         /* flags */
691         ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
692 }