Particle dupliobject rotation changes:
[blender.git] / source / blender / blenkernel / intern / anim.c
1 /*
2  * $Id$
3  *
4  * ***** BEGIN GPL LICENSE BLOCK *****
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * as published by the Free Software Foundation; either version 2
9  * of the License, or (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software Foundation,
18  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19  *
20  * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
21  * All rights reserved.
22  *
23  * The Original Code is: all of this file.
24  *
25  * Contributor(s): none yet.
26  *
27  * ***** END GPL LICENSE BLOCK *****
28  */
29
30 /** \file blender/blenkernel/intern/anim.c
31  *  \ingroup bke
32  */
33
34
35 #include <stdio.h>
36 #include <math.h>
37 #include <string.h>
38
39 #include "MEM_guardedalloc.h"
40
41 #include "BLI_blenlib.h"
42 #include "BLI_editVert.h"
43 #include "BLI_math.h"
44 #include "BLI_rand.h"
45 #include "BLI_utildefines.h"
46
47 #include "DNA_anim_types.h"
48 #include "DNA_armature_types.h"
49 #include "DNA_group_types.h"
50 #include "DNA_key_types.h"
51 #include "DNA_meshdata_types.h"
52 #include "DNA_scene_types.h"
53 #include "DNA_vfont_types.h"
54
55 #include "BKE_animsys.h"
56 #include "BKE_curve.h"
57 #include "BKE_DerivedMesh.h"
58 #include "BKE_depsgraph.h"
59 #include "BKE_font.h"
60 #include "BKE_group.h"
61 #include "BKE_global.h"
62 #include "BKE_key.h"
63 #include "BKE_lattice.h"
64 #include "BKE_main.h"
65 #include "BKE_mesh.h"
66 #include "BKE_object.h"
67 #include "BKE_particle.h"
68 #include "BKE_scene.h"
69 #include "BKE_utildefines.h"
70 #include "BKE_depsgraph.h"
71 #include "BKE_anim.h"
72
73
74 // XXX bad level call...
75
76 /* --------------------- */
77 /* forward declarations */
78
79 static void object_duplilist_recursive(ID *id, Scene *scene, Object *ob, ListBase *duplilist, float par_space_mat[][4], int level, int animated);
80
81 /* ******************************************************************** */
82 /* Animation Visualisation */
83
84 /* Initialise the default settings for animation visualisation */
85 void animviz_settings_init(bAnimVizSettings *avs)
86 {
87         /* sanity check */
88         if (avs == NULL)
89                 return;
90                 
91         /* ghosting settings */
92         avs->ghost_bc= avs->ghost_ac= 10;
93         
94         avs->ghost_sf= 1; // xxx - take from scene instead?
95         avs->ghost_ef= 250; // xxx - take from scene instead?
96         
97         avs->ghost_step= 1;
98         
99         
100         /* path settings */
101         avs->path_bc= avs->path_ac= 10;
102         
103         avs->path_sf= 1; // xxx - take from scene instead?
104         avs->path_ef= 250; // xxx - take from scene instead?
105         
106         avs->path_viewflag= (MOTIONPATH_VIEW_KFRAS|MOTIONPATH_VIEW_KFNOS);
107         
108         avs->path_step= 1;
109 }
110
111 /* ------------------- */
112
113 /* Free the given motion path's cache */
114 void animviz_free_motionpath_cache(bMotionPath *mpath) 
115 {
116         /* sanity check */
117         if (mpath == NULL) 
118                 return;
119                 
120         /* free the path if necessary */
121         if (mpath->points)
122                 MEM_freeN(mpath->points);
123         
124         /* reset the relevant parameters */
125         mpath->points= NULL;
126         mpath->length= 0;
127 }
128
129 /* Free the given motion path instance and its data 
130  * NOTE: this frees the motion path given!
131  */
132 void animviz_free_motionpath(bMotionPath *mpath)
133 {
134         /* sanity check */
135         if (mpath == NULL)
136                 return;
137         
138         /* free the cache first */
139         animviz_free_motionpath_cache(mpath);
140         
141         /* now the instance itself */
142         MEM_freeN(mpath);
143 }
144
145 /* ------------------- */
146
147 /* Setup motion paths for the given data
148  *      - scene: current scene (for frame ranges, etc.)
149  *      - ob: object to add paths for (must be provided)
150  *      - pchan: posechannel to add paths for (optional; if not provided, object-paths are assumed)
151  */
152 bMotionPath *animviz_verify_motionpaths(Scene *scene, Object *ob, bPoseChannel *pchan)
153 {
154         bAnimVizSettings *avs;
155         bMotionPath *mpath, **dst;
156         
157         /* sanity checks */
158         if (ELEM(NULL, scene, ob))
159                 return NULL;
160                 
161         /* get destination data */
162         if (pchan) {
163                 /* paths for posechannel - assume that posechannel belongs to the object */
164                 avs= &ob->pose->avs;
165                 dst= &pchan->mpath;
166         }
167         else {
168                 /* paths for object */
169                 avs= &ob->avs;
170                 dst= &ob->mpath;
171         }
172
173         /* avoid 0 size allocs */
174         if (avs->path_sf >= avs->path_ef) {
175                 return NULL;
176         }
177
178         /* if there is already a motionpath, just return that,
179          * but provided it's settings are ok 
180          */
181         if (*dst != NULL) {
182                 mpath= *dst;
183                 
184                 /* if range is not invalid, and/or length is set ok, just return */
185                 if ((mpath->start_frame != mpath->end_frame) && (mpath->length > 0))
186                         return mpath;
187         }
188         else {
189                 /* create a new motionpath, and assign it */
190                 mpath= MEM_callocN(sizeof(bMotionPath), "bMotionPath");
191                 *dst= mpath;
192         }
193         
194         /* set settings from the viz settings */
195         mpath->start_frame= avs->path_sf;
196         mpath->end_frame= avs->path_ef;
197         
198         mpath->length= mpath->end_frame - mpath->start_frame;
199         
200         if (avs->path_bakeflag & MOTIONPATH_BAKE_HEADS)
201                 mpath->flag |= MOTIONPATH_FLAG_BHEAD;
202         else
203                 mpath->flag &= ~MOTIONPATH_FLAG_BHEAD;
204         
205         /* allocate a cache */
206         mpath->points= MEM_callocN(sizeof(bMotionPathVert)*mpath->length, "bMotionPathVerts");
207         
208         /* tag viz settings as currently having some path(s) which use it */
209         avs->path_bakeflag |= MOTIONPATH_BAKE_HAS_PATHS;
210         
211         /* return it */
212         return mpath;
213 }
214
215 /* ------------------- */
216
217 /* Motion path needing to be baked (mpt) */
218 typedef struct MPathTarget {
219         struct MPathTarget *next, *prev;
220         
221         bMotionPath *mpath;                     /* motion path in question */
222         
223         Object *ob;                                     /* source object */
224         bPoseChannel *pchan;            /* source posechannel (if applicable) */
225 } MPathTarget;
226
227 /* ........ */
228
229 /* get list of motion paths to be baked for the given object
230  *      - assumes the given list is ready to be used
231  */
232 // TODO: it would be nice in future to be able to update objects dependant on these bones too?
233 void animviz_get_object_motionpaths(Object *ob, ListBase *targets)
234 {
235         MPathTarget *mpt;
236         
237         /* object itself first */
238         if ((ob->avs.recalc & ANIMVIZ_RECALC_PATHS) && (ob->mpath)) {
239                 /* new target for object */
240                 mpt= MEM_callocN(sizeof(MPathTarget), "MPathTarget Ob");
241                 BLI_addtail(targets, mpt);
242                 
243                 mpt->mpath= ob->mpath;
244                 mpt->ob= ob;
245         }
246         
247         /* bones */
248         if ((ob->pose) && (ob->pose->avs.recalc & ANIMVIZ_RECALC_PATHS)) {
249                 bArmature *arm= ob->data;
250                 bPoseChannel *pchan;
251                 
252                 for (pchan= ob->pose->chanbase.first; pchan; pchan= pchan->next) {
253                         if ((pchan->bone) && (arm->layer & pchan->bone->layer) && (pchan->mpath)) {
254                                 /* new target for bone */
255                                 mpt= MEM_callocN(sizeof(MPathTarget), "MPathTarget PoseBone");
256                                 BLI_addtail(targets, mpt);
257                                 
258                                 mpt->mpath= pchan->mpath;
259                                 mpt->ob= ob;
260                                 mpt->pchan= pchan;
261                         }
262                 }
263         }
264 }
265
266 /* ........ */
267
268 /* Note on evaluation optimisations:
269  * Optimisations currently used here play tricks with the depsgraph in order to try and 
270  * evaluate as few objects as strictly necessary to get nicer performance under standard
271  * production conditions. For those people who really need the accurate version, 
272  * disable the ifdef (i.e. 1 -> 0) and comment out the call to motionpaths_calc_optimise_depsgraph()
273  */
274
275 /* tweak the object ordering to trick depsgraph into making MotionPath calculations run faster */
276 static void motionpaths_calc_optimise_depsgraph(Scene *scene, ListBase *targets)
277 {
278         Base *base, *baseNext;
279         MPathTarget *mpt;
280         
281         /* make sure our temp-tag isn't already in use */
282         for (base= scene->base.first; base; base= base->next)
283                 base->object->flag &= ~BA_TEMP_TAG;
284         
285         /* for each target, dump its object to the start of the list if it wasn't moved already */
286         for (mpt= targets->first; mpt; mpt= mpt->next) {
287                 for (base=scene->base.first; base; base=baseNext) {
288                         baseNext = base->next;
289                         
290                         if ((base->object == mpt->ob) && !(mpt->ob->flag & BA_TEMP_TAG)) {
291                                 BLI_remlink(&scene->base, base);
292                                 BLI_addhead(&scene->base, base);
293                                 
294                                 mpt->ob->flag |= BA_TEMP_TAG;
295                                 break; // we really don't need to continue anymore once this happens, but this line might really 'break'
296                         }
297                 }
298         }
299         
300         /* "brew me a list that's sorted a bit faster now depsy" */
301         DAG_scene_sort(G.main, scene);
302 }
303
304 /* update scene for current frame */
305 static void motionpaths_calc_update_scene(Scene *scene)
306 {
307 #if 1 // 'production' optimisations always on
308         Base *base, *last=NULL;
309         
310         /* only stuff that moves or needs display still */
311         DAG_scene_update_flags(G.main, scene, scene->lay, TRUE);
312         
313         /* find the last object with the tag 
314          *      - all those afterwards are assumed to not be relevant for our calculations
315          */
316         // optimise further by moving out...
317         for (base=scene->base.first; base; base=base->next) {
318                 if (base->object->flag & BA_TEMP_TAG)
319                         last = base;
320         }
321         
322         /* perform updates for tagged objects */
323         // XXX: this will break if rigs depend on scene or other data that 
324         // is animated but not attached to/updatable from objects
325         for (base=scene->base.first; base; base=base->next) {
326                 /* update this object */
327                 object_handle_update(scene, base->object);
328                 
329                 /* if this is the last one we need to update, let's stop to save some time */
330                 if (base == last)
331                         break;
332         }
333 #else // original, 'always correct' version
334         /* do all updates 
335          *      - if this is too slow, resort to using a more efficient way 
336          *        that doesn't force complete update, but for now, this is the
337          *        most accurate way!
338          */
339         scene_update_for_newframe(G.main, scene, scene->lay); // XXX this is the best way we can get anything moving
340 #endif
341 }
342
343 /* ........ */
344
345 /* perform baking for the targets on the current frame */
346 static void motionpaths_calc_bake_targets(Scene *scene, ListBase *targets)
347 {
348         MPathTarget *mpt;
349         
350         /* for each target, check if it can be baked on the current frame */
351         for (mpt= targets->first; mpt; mpt= mpt->next) {        
352                 bMotionPath *mpath= mpt->mpath;
353                 bMotionPathVert *mpv;
354                 
355                 /* current frame must be within the range the cache works for 
356                  *      - is inclusive of the first frame, but not the last otherwise we get buffer overruns
357                  */
358                 if ((CFRA < mpath->start_frame) || (CFRA >= mpath->end_frame))
359                         continue;
360                 
361                 /* get the relevant cache vert to write to */
362                 mpv= mpath->points + (CFRA - mpath->start_frame);
363                 
364                 /* pose-channel or object path baking? */
365                 if (mpt->pchan) {
366                         /* heads or tails */
367                         if (mpath->flag & MOTIONPATH_FLAG_BHEAD) {
368                                 VECCOPY(mpv->co, mpt->pchan->pose_head);
369                         }
370                         else {
371                                 VECCOPY(mpv->co, mpt->pchan->pose_tail);
372                         }
373                         
374                         /* result must be in worldspace */
375                         mul_m4_v3(mpt->ob->obmat, mpv->co);
376                 }
377                 else {
378                         /* worldspace object location */
379                         VECCOPY(mpv->co, mpt->ob->obmat[3]);
380                 }
381         }
382 }
383
384 /* Perform baking of the given object's and/or its bones' transforms to motion paths 
385  *      - scene: current scene
386  *      - ob: object whose flagged motionpaths should get calculated
387  *      - recalc: whether we need to 
388  */
389 // TODO: include reports pointer?
390 void animviz_calc_motionpaths(Scene *scene, ListBase *targets)
391 {
392         MPathTarget *mpt;
393         int sfra, efra;
394         int cfra;
395         
396         /* sanity check */
397         if (ELEM(NULL, targets, targets->first))
398                 return;
399         
400         /* set frame values */
401         cfra = CFRA;
402         sfra = efra = cfra;
403         
404         // TODO: this method could be improved...
405         //      1) max range for standard baking
406         //      2) minimum range for recalc baking (i.e. between keyframes, but how?)
407         for (mpt= targets->first; mpt; mpt= mpt->next) {
408                 /* try to increase area to do (only as much as needed) */
409                 sfra= MIN2(sfra, mpt->mpath->start_frame);
410                 efra= MAX2(efra, mpt->mpath->end_frame);
411         }
412         if (efra <= sfra) return;
413         
414         /* optimise the depsgraph for faster updates */
415         // TODO: whether this is used should depend on some setting for the level of optimisations used
416         motionpaths_calc_optimise_depsgraph(scene, targets);
417         
418         /* calculate path over requested range */
419         for (CFRA=sfra; CFRA<=efra; CFRA++) {
420                 /* update relevant data for new frame */
421                 motionpaths_calc_update_scene(scene);
422                 
423                 /* perform baking for targets */
424                 motionpaths_calc_bake_targets(scene, targets);
425         }
426         
427         /* reset original environment */
428         CFRA= cfra;
429         motionpaths_calc_update_scene(scene);
430         
431         /* clear recalc flags from targets */
432         for (mpt= targets->first; mpt; mpt= mpt->next) {
433                 bAnimVizSettings *avs;
434                 
435                 /* get pointer to animviz settings for each target */
436                 if (mpt->pchan)
437                         avs= &mpt->ob->pose->avs;
438                 else    
439                         avs= &mpt->ob->avs;
440                 
441                 /* clear the flag requesting recalculation of targets */
442                 avs->recalc &= ~ANIMVIZ_RECALC_PATHS;
443         }
444 }
445
446 /* ******************************************************************** */
447 /* Curve Paths - for curve deforms and/or curve following */
448
449 /* free curve path data 
450  * NOTE: frees the path itself!
451  * NOTE: this is increasingly innacurate with non-uniform BevPoint subdivisions [#24633]
452  */
453 void free_path(Path *path)
454 {
455         if(path->data) MEM_freeN(path->data);
456         MEM_freeN(path);
457 }
458
459 /* calculate a curve-deform path for a curve 
460  *      - only called from displist.c -> do_makeDispListCurveTypes
461  */
462 void calc_curvepath(Object *ob)
463 {
464         BevList *bl;
465         BevPoint *bevp, *bevpn, *bevpfirst, *bevplast;
466         PathPoint *pp;
467         Curve *cu;
468         Nurb *nu;
469         Path *path;
470         float *fp, *dist, *maxdist, xyz[3];
471         float fac, d=0, fac1, fac2;
472         int a, tot, cycl=0;
473         ListBase *nurbs;
474         
475         /* in a path vertices are with equal differences: path->len = number of verts */
476         /* NOW WITH BEVELCURVE!!! */
477         
478         if(ob==NULL || ob->type != OB_CURVE) return;
479         cu= ob->data;
480
481         nurbs= BKE_curve_nurbs(cu);
482         nu= nurbs->first;
483
484         if(cu->path) free_path(cu->path);
485         cu->path= NULL;
486         
487         bl= cu->bev.first;
488         if(bl==NULL || !bl->nr) return;
489
490         cu->path=path= MEM_callocN(sizeof(Path), "calc_curvepath");
491         
492         /* if POLY: last vertice != first vertice */
493         cycl= (bl->poly!= -1);
494         
495         if(cycl) tot= bl->nr;
496         else tot= bl->nr-1;
497         
498         path->len= tot+1;
499         /* exception: vector handle paths and polygon paths should be subdivided at least a factor resolu */
500         if(path->len<nu->resolu*SEGMENTSU(nu)) path->len= nu->resolu*SEGMENTSU(nu);
501         
502         dist= (float *)MEM_mallocN((tot+1)*4, "calcpathdist");
503
504                 /* all lengths in *dist */
505         bevp= bevpfirst= (BevPoint *)(bl+1);
506         fp= dist;
507         *fp= 0;
508         for(a=0; a<tot; a++) {
509                 fp++;
510                 if(cycl && a==tot-1)
511                         sub_v3_v3v3(xyz, bevpfirst->vec, bevp->vec);
512                 else
513                         sub_v3_v3v3(xyz, (bevp+1)->vec, bevp->vec);
514                 
515                 *fp= *(fp-1)+len_v3(xyz);
516                 bevp++;
517         }
518         
519         path->totdist= *fp;
520         
521                 /* the path verts  in path->data */
522                 /* now also with TILT value */
523         pp= path->data = (PathPoint *)MEM_callocN(sizeof(PathPoint)*path->len, "pathdata");
524         
525         bevp= bevpfirst;
526         bevpn= bevp+1;
527         bevplast= bevpfirst + (bl->nr-1);
528         fp= dist+1;
529         maxdist= dist+tot;
530         fac= 1.0f/((float)path->len-1.0f);
531                 fac = fac * path->totdist;
532         
533         for(a=0; a<path->len; a++) {
534                 
535                 d= ((float)a)*fac;
536                 
537                 /* we're looking for location (distance) 'd' in the array */
538                 while((d>= *fp) && fp<maxdist) {
539                         fp++;
540                         if(bevp<bevplast) bevp++;
541                         bevpn= bevp+1;
542                         if(bevpn>bevplast) {
543                                 if(cycl) bevpn= bevpfirst;
544                                 else bevpn= bevplast;
545                         }
546                 }
547                 
548                 fac1= *(fp)- *(fp-1);
549                 fac2= *(fp)-d;
550                 fac1= fac2/fac1;
551                 fac2= 1.0f-fac1;
552                 
553                 interp_v3_v3v3(pp->vec, bevp->vec, bevpn->vec, fac2);
554                 pp->vec[3]= fac1*bevp->alfa + fac2*bevpn->alfa;
555                 pp->radius= fac1*bevp->radius + fac2*bevpn->radius;
556                 pp->weight= fac1*bevp->weight + fac2*bevpn->weight;
557                 interp_qt_qtqt(pp->quat, bevp->quat, bevpn->quat, fac2);
558                 normalize_qt(pp->quat);
559                 
560                 pp++;
561         }
562         
563         MEM_freeN(dist);
564 }
565
566
567 /* is this only used internally?*/
568 int interval_test(int min, int max, int p1, int cycl)
569 {
570         if(cycl) {
571                 if(p1 < min) 
572                         p1=  ((p1 -min) % (max-min+1)) + max+1;
573                 else if(p1 > max)
574                         p1=  ((p1 -min) % (max-min+1)) + min;
575         }
576         else {
577                 if(p1 < min) p1= min;
578                 else if(p1 > max) p1= max;
579         }
580         return p1;
581 }
582
583
584 /* calculate the deformation implied by the curve path at a given parametric position, and returns whether this operation succeeded 
585  *      - *vec needs FOUR items!
586  *      - ctime is normalized range <0-1>
587  */
588 int where_on_path(Object *ob, float ctime, float *vec, float *dir, float *quat, float *radius, float *weight)   /* returns OK */
589 {
590         Curve *cu;
591         Nurb *nu;
592         BevList *bl;
593         Path *path;
594         PathPoint *pp, *p0, *p1, *p2, *p3;
595         float fac;
596         float data[4];
597         int cycl=0, s0, s1, s2, s3;
598
599         if(ob==NULL || ob->type != OB_CURVE) return 0;
600         cu= ob->data;
601         if(cu->path==NULL || cu->path->data==NULL) {
602                 printf("no path!\n");
603                 return 0;
604         }
605         path= cu->path;
606         pp= path->data;
607         
608         /* test for cyclic */
609         bl= cu->bev.first;
610         if (!bl) return 0;
611         if (!bl->nr) return 0;
612         if(bl->poly> -1) cycl= 1;
613
614         ctime *= (path->len-1);
615         
616         s1= (int)floor(ctime);
617         fac= (float)(s1+1)-ctime;
618
619         /* path->len is corected for cyclic */
620         s0= interval_test(0, path->len-1-cycl, s1-1, cycl);
621         s1= interval_test(0, path->len-1-cycl, s1, cycl);
622         s2= interval_test(0, path->len-1-cycl, s1+1, cycl);
623         s3= interval_test(0, path->len-1-cycl, s1+2, cycl);
624
625         p0= pp + s0;
626         p1= pp + s1;
627         p2= pp + s2;
628         p3= pp + s3;
629
630         /* note, commented out for follow constraint */
631         //if(cu->flag & CU_FOLLOW) {
632
633                 key_curve_tangent_weights(1.0f-fac, data, KEY_BSPLINE);
634
635                 interp_v3_v3v3v3v3(dir, p0->vec, p1->vec, p2->vec, p3->vec, data);
636
637                 /* make compatible with vectoquat */
638                 negate_v3(dir);
639         //}
640         
641         nu= cu->nurb.first;
642
643         /* make sure that first and last frame are included in the vectors here  */
644         if(nu->type == CU_POLY) key_curve_position_weights(1.0f-fac, data, KEY_LINEAR);
645         else if(nu->type == CU_BEZIER) key_curve_position_weights(1.0f-fac, data, KEY_LINEAR);
646         else if(s0==s1 || p2==p3) key_curve_position_weights(1.0f-fac, data, KEY_CARDINAL);
647         else key_curve_position_weights(1.0f-fac, data, KEY_BSPLINE);
648
649         vec[0]= data[0]*p0->vec[0] + data[1]*p1->vec[0] + data[2]*p2->vec[0] + data[3]*p3->vec[0] ; /* X */
650         vec[1]= data[0]*p0->vec[1] + data[1]*p1->vec[1] + data[2]*p2->vec[1] + data[3]*p3->vec[1] ; /* Y */
651         vec[2]= data[0]*p0->vec[2] + data[1]*p1->vec[2] + data[2]*p2->vec[2] + data[3]*p3->vec[2] ; /* Z */
652         vec[3]= data[0]*p0->vec[3] + data[1]*p1->vec[3] + data[2]*p2->vec[3] + data[3]*p3->vec[3] ; /* Tilt, should not be needed since we have quat still used */
653
654         if (quat) {
655                 float totfac, q1[4], q2[4];
656
657                 totfac= data[0]+data[3];
658                 if(totfac>FLT_EPSILON)  interp_qt_qtqt(q1, p0->quat, p3->quat, data[3] / totfac);
659                 else                                    QUATCOPY(q1, p1->quat);
660
661                 totfac= data[1]+data[2];
662                 if(totfac>FLT_EPSILON)  interp_qt_qtqt(q2, p1->quat, p2->quat, data[2] / totfac);
663                 else                                    QUATCOPY(q2, p3->quat);
664
665                 totfac = data[0]+data[1]+data[2]+data[3];
666                 if(totfac>FLT_EPSILON)  interp_qt_qtqt(quat, q1, q2, (data[1]+data[2]) / totfac);
667                 else                                    QUATCOPY(quat, q2);
668         }
669
670         if(radius)
671                 *radius= data[0]*p0->radius + data[1]*p1->radius + data[2]*p2->radius + data[3]*p3->radius;
672
673         if(weight)
674                 *weight= data[0]*p0->weight + data[1]*p1->weight + data[2]*p2->weight + data[3]*p3->weight;
675
676         return 1;
677 }
678
679 /* ******************************************************************** */
680 /* Dupli-Geometry */
681
682 static DupliObject *new_dupli_object(ListBase *lb, Object *ob, float mat[][4], int lay, int index, int type, int animated)
683 {
684         DupliObject *dob= MEM_callocN(sizeof(DupliObject), "dupliobject");
685         
686         BLI_addtail(lb, dob);
687         dob->ob= ob;
688         copy_m4_m4(dob->mat, mat);
689         copy_m4_m4(dob->omat, ob->obmat);
690         dob->origlay= ob->lay;
691         dob->index= index;
692         dob->type= type;
693         dob->animated= (type == OB_DUPLIGROUP) && animated;
694         ob->lay= lay;
695         
696         return dob;
697 }
698
699 static void group_duplilist(ListBase *lb, Scene *scene, Object *ob, int level, int animated)
700 {
701         DupliObject *dob;
702         Group *group;
703         GroupObject *go;
704         float mat[4][4], tmat[4][4];
705         
706         if(ob->dup_group==NULL) return;
707         group= ob->dup_group;
708         
709         /* simple preventing of too deep nested groups */
710         if(level>MAX_DUPLI_RECUR) return;
711         
712         /* handles animated groups, and */
713         /* we need to check update for objects that are not in scene... */
714         group_handle_recalc_and_update(scene, ob, group);
715         animated= animated || group_is_animated(ob, group);
716         
717         for(go= group->gobject.first; go; go= go->next) {
718                 /* note, if you check on layer here, render goes wrong... it still deforms verts and uses parent imat */
719                 if(go->ob!=ob) {
720                         
721                         /* group dupli offset, should apply after everything else */
722                         if(!is_zero_v3(group->dupli_ofs)) {
723                                 copy_m4_m4(tmat, go->ob->obmat);
724                                 sub_v3_v3v3(tmat[3], tmat[3], group->dupli_ofs);
725                                 mul_m4_m4m4(mat, tmat, ob->obmat);
726                         }
727                         else {
728                                 mul_m4_m4m4(mat, go->ob->obmat, ob->obmat);
729                         }
730                         
731                         dob= new_dupli_object(lb, go->ob, mat, ob->lay, 0, OB_DUPLIGROUP, animated);
732
733                         /* check the group instance and object layers match, also that the object visible flags are ok. */
734                         if(     (dob->origlay & group->layer)==0 ||
735                                 (G.rendering==0 && dob->ob->restrictflag & OB_RESTRICT_VIEW) ||
736                                 (G.rendering && dob->ob->restrictflag & OB_RESTRICT_RENDER)
737                         ) {
738                                 dob->no_draw= 1;
739                         }
740                         else {
741                                 dob->no_draw= 0;
742                         }
743
744                         if(go->ob->transflag & OB_DUPLI) {
745                                 copy_m4_m4(dob->ob->obmat, dob->mat);
746                                 object_duplilist_recursive(&group->id, scene, go->ob, lb, ob->obmat, level+1, animated);
747                                 copy_m4_m4(dob->ob->obmat, dob->omat);
748                         }
749                 }
750         }
751 }
752
753 static void frames_duplilist(ListBase *lb, Scene *scene, Object *ob, int level, int animated)
754 {
755         extern int enable_cu_speed;     /* object.c */
756         Object copyob = {{NULL}};
757         int cfrao = scene->r.cfra;
758         
759         /* simple prevention of too deep nested groups */
760         if (level > MAX_DUPLI_RECUR) return;
761         
762         /* if we don't have any data/settings which will lead to object movement,
763          * don't waste time trying, as it will all look the same...
764          */
765         if (ob->parent==NULL && ob->constraints.first==NULL && ob->adt==NULL) 
766                 return;
767         
768         /* make a copy of the object's original data (before any dupli-data overwrites it) 
769          * as we'll need this to keep track of unkeyed data
770          *      - this doesn't take into account other data that can be reached from the object,
771          *        for example it's shapekeys or bones, hence the need for an update flush at the end
772          */
773         copyob = *ob;
774         
775         /* duplicate over the required range */
776         if (ob->transflag & OB_DUPLINOSPEED) enable_cu_speed= 0;
777         
778         for (scene->r.cfra= ob->dupsta; scene->r.cfra<=ob->dupend; scene->r.cfra++) {
779                 short ok= 1;
780                 
781                 /* - dupoff = how often a frames within the range shouldn't be made into duplis
782                  * - dupon = the length of each "skipping" block in frames
783                  */
784                 if (ob->dupoff) {
785                         ok= scene->r.cfra - ob->dupsta;
786                         ok= ok % (ob->dupon+ob->dupoff);
787                         ok= (ok < ob->dupon);
788                 }
789                 
790                 if (ok) {       
791                         DupliObject *dob;
792                         
793                         /* WARNING: doing animation updates in this way is not terribly accurate, as the dependencies
794                          * and/or other objects which may affect this object's transforms are not updated either.
795                          * However, this has always been the way that this worked (i.e. pre 2.5), so I guess that it'll be fine!
796                          */
797                         BKE_animsys_evaluate_animdata(scene, &ob->id, ob->adt, (float)scene->r.cfra, ADT_RECALC_ANIM); /* ob-eval will do drivers, so we don't need to do them */
798                         where_is_object_time(scene, ob, (float)scene->r.cfra);
799                         
800                         dob= new_dupli_object(lb, ob, ob->obmat, ob->lay, scene->r.cfra, OB_DUPLIFRAMES, animated);
801                         copy_m4_m4(dob->omat, copyob.obmat);
802                 }
803         }
804
805         enable_cu_speed= 1;
806         
807         /* reset frame to original frame, then re-evaluate animation as above 
808          * as 2.5 animation data may have far-reaching consequences
809          */
810         scene->r.cfra= cfrao;
811         
812         BKE_animsys_evaluate_animdata(scene, &ob->id, ob->adt, (float)scene->r.cfra, ADT_RECALC_ANIM); /* ob-eval will do drivers, so we don't need to do them */
813         where_is_object_time(scene, ob, (float)scene->r.cfra);
814         
815         /* but, to make sure unkeyed object transforms are still sane, 
816          * let's copy object's original data back over
817          */
818         *ob = copyob;
819 }
820
821 typedef struct vertexDupliData {
822         ID *id; /* scene or group, for recursive loops */
823         int level;
824         int animated;
825         ListBase *lb;
826         float pmat[4][4];
827         float obmat[4][4]; /* Only used for dupliverts inside dupligroups, where the ob->obmat is modified */
828         Scene *scene;
829         Object *ob, *par;
830         float (*orco)[3];
831 } vertexDupliData;
832
833 /* ------------- */
834
835 static void vertex_dupli__mapFunc(void *userData, int index, float *co, float *no_f, short *no_s)
836 {
837         DupliObject *dob;
838         vertexDupliData *vdd= userData;
839         float vec[3], q2[4], mat[3][3], tmat[4][4], obmat[4][4];
840         int origlay;
841         
842         mul_v3_m4v3(vec, vdd->pmat, co);
843         sub_v3_v3(vec, vdd->pmat[3]);
844         add_v3_v3(vec, vdd->obmat[3]);
845         
846         copy_m4_m4(obmat, vdd->obmat);
847         VECCOPY(obmat[3], vec);
848         
849         if(vdd->par->transflag & OB_DUPLIROT) {
850                 if(no_f) {
851                         vec[0]= -no_f[0]; vec[1]= -no_f[1]; vec[2]= -no_f[2];
852                 }
853                 else if(no_s) {
854                         vec[0]= -no_s[0]; vec[1]= -no_s[1]; vec[2]= -no_s[2];
855                 }
856                 
857                 vec_to_quat( q2,vec, vdd->ob->trackflag, vdd->ob->upflag);
858                 
859                 quat_to_mat3( mat,q2);
860                 copy_m4_m4(tmat, obmat);
861                 mul_m4_m4m3(obmat, tmat, mat);
862         }
863
864         origlay = vdd->ob->lay;
865         
866         dob= new_dupli_object(vdd->lb, vdd->ob, obmat, vdd->par->lay, index, OB_DUPLIVERTS, vdd->animated);
867
868         /* restore the original layer so that each dupli will have proper dob->origlay */
869         vdd->ob->lay = origlay;
870
871         if(vdd->orco)
872                 VECCOPY(dob->orco, vdd->orco[index]);
873         
874         if(vdd->ob->transflag & OB_DUPLI) {
875                 float tmpmat[4][4];
876                 copy_m4_m4(tmpmat, vdd->ob->obmat);
877                 copy_m4_m4(vdd->ob->obmat, obmat); /* pretend we are really this mat */
878                 object_duplilist_recursive((ID *)vdd->id, vdd->scene, vdd->ob, vdd->lb, obmat, vdd->level+1, vdd->animated);
879                 copy_m4_m4(vdd->ob->obmat, tmpmat);
880         }
881 }
882
883 static void vertex_duplilist(ListBase *lb, ID *id, Scene *scene, Object *par, float par_space_mat[][4], int level, int animated)
884 {
885         Object *ob, *ob_iter;
886         Mesh *me= par->data;
887         Base *base = NULL;
888         DerivedMesh *dm;
889         vertexDupliData vdd;
890         Scene *sce = NULL;
891         Group *group = NULL;
892         GroupObject * go = NULL;
893         EditMesh *em;
894         float vec[3], no[3], pmat[4][4];
895         int totvert, a, oblay;
896         unsigned int lay;
897         
898         copy_m4_m4(pmat, par->obmat);
899         
900         /* simple preventing of too deep nested groups */
901         if(level>MAX_DUPLI_RECUR) return;
902         
903         em = BKE_mesh_get_editmesh(me);
904         
905         if(em) {
906                 dm= editmesh_get_derived_cage(scene, par, em, CD_MASK_BAREMESH);
907                 BKE_mesh_end_editmesh(me, em);
908         } else
909                 dm= mesh_get_derived_deform(scene, par, CD_MASK_BAREMESH);
910         
911         if(G.rendering) {
912                 vdd.orco= (float(*)[3])get_mesh_orco_verts(par);
913                 transform_mesh_orco_verts(me, vdd.orco, me->totvert, 0);
914         }
915         else
916                 vdd.orco= NULL;
917         
918         totvert = dm->getNumVerts(dm);
919
920         /* having to loop on scene OR group objects is NOT FUN */
921         if (GS(id->name) == ID_SCE) {
922                 sce = (Scene *)id;
923                 lay= sce->lay;
924                 base= sce->base.first;
925         } else {
926                 group = (Group *)id;
927                 lay= group->layer;
928                 go = group->gobject.first;
929         }
930         
931         /* Start looping on Scene OR Group objects */
932         while (base || go) { 
933                 if (sce) {
934                         ob_iter= base->object;
935                         oblay = base->lay;
936                 } else {
937                         ob_iter= go->ob;
938                         oblay = ob_iter->lay;
939                 }
940                 
941                 if (lay & oblay && scene->obedit!=ob_iter) {
942                         ob=ob_iter->parent;
943                         while(ob) {
944                                 if(ob==par) {
945                                         ob = ob_iter;
946         /* End Scene/Group object loop, below is generic */
947                                         
948                                         
949                                         /* par_space_mat - only used for groups so we can modify the space dupli's are in
950                                            when par_space_mat is NULL ob->obmat can be used instead of ob__obmat
951                                         */
952                                         if(par_space_mat)
953                                                 mul_m4_m4m4(vdd.obmat, ob->obmat, par_space_mat);
954                                         else
955                                                 copy_m4_m4(vdd.obmat, ob->obmat);
956
957                                         vdd.id= id;
958                                         vdd.level= level;
959                                         vdd.animated= animated;
960                                         vdd.lb= lb;
961                                         vdd.ob= ob;
962                                         vdd.scene= scene;
963                                         vdd.par= par;
964                                         copy_m4_m4(vdd.pmat, pmat);
965                                         
966                                         /* mballs have a different dupli handling */
967                                         if(ob->type!=OB_MBALL) ob->flag |= OB_DONE;     /* doesnt render */
968
969                                         if(me->edit_mesh) {
970                                                 dm->foreachMappedVert(dm, vertex_dupli__mapFunc, (void*) &vdd);
971                                         }
972                                         else {
973                                                 for(a=0; a<totvert; a++) {
974                                                         dm->getVertCo(dm, a, vec);
975                                                         dm->getVertNo(dm, a, no);
976                                                         
977                                                         vertex_dupli__mapFunc(&vdd, a, vec, no, NULL);
978                                                 }
979                                         }
980                                         if(sce) {
981                                                 /* Set proper layer in case of scene looping,
982                                                  * in case of groups the object layer will be
983                                                  * changed when it's duplicated due to the
984                                                  * group duplication.
985                                                  */
986                                                 ob->lay = vdd.par->lay;
987                                         }
988                                         
989                                         break;
990                                 }
991                                 ob= ob->parent;
992                         }
993                 }
994                 if (sce)        base= base->next;       /* scene loop */
995                 else            go= go->next;           /* group loop */
996         }
997
998         if(vdd.orco)
999                 MEM_freeN(vdd.orco);
1000         dm->release(dm);
1001 }
1002
1003 static void face_duplilist(ListBase *lb, ID *id, Scene *scene, Object *par, float par_space_mat[][4], int level, int animated)
1004 {
1005         Object *ob, *ob_iter;
1006         Base *base = NULL;
1007         DupliObject *dob;
1008         DerivedMesh *dm;
1009         Mesh *me= par->data;
1010         MTFace *mtface;
1011         MFace *mface;
1012         MVert *mvert;
1013         float pmat[4][4], imat[3][3], (*orco)[3] = NULL, w;
1014         int lay, oblay, totface, a;
1015         Scene *sce = NULL;
1016         Group *group = NULL;
1017         GroupObject *go = NULL;
1018         EditMesh *em;
1019         float ob__obmat[4][4]; /* needed for groups where the object matrix needs to be modified */
1020         
1021         /* simple preventing of too deep nested groups */
1022         if(level>MAX_DUPLI_RECUR) return;
1023         
1024         copy_m4_m4(pmat, par->obmat);
1025         
1026         em = BKE_mesh_get_editmesh(me);
1027         if(em) {
1028                 int totvert;
1029                 
1030                 dm= editmesh_get_derived_cage(scene, par, em, CD_MASK_BAREMESH);
1031                 
1032                 totface= dm->getNumFaces(dm);
1033                 mface= MEM_mallocN(sizeof(MFace)*totface, "mface temp");
1034                 dm->copyFaceArray(dm, mface);
1035                 totvert= dm->getNumVerts(dm);
1036                 mvert= MEM_mallocN(sizeof(MVert)*totvert, "mvert temp");
1037                 dm->copyVertArray(dm, mvert);
1038
1039                 BKE_mesh_end_editmesh(me, em);
1040         }
1041         else {
1042                 dm = mesh_get_derived_deform(scene, par, CD_MASK_BAREMESH);
1043                 
1044                 totface= dm->getNumFaces(dm);
1045                 mface= dm->getFaceArray(dm);
1046                 mvert= dm->getVertArray(dm);
1047         }
1048
1049         if(G.rendering) {
1050
1051                 orco= (float(*)[3])get_mesh_orco_verts(par);
1052                 transform_mesh_orco_verts(me, orco, me->totvert, 0);
1053                 mtface= me->mtface;
1054         }
1055         else {
1056                 orco= NULL;
1057                 mtface= NULL;
1058         }
1059         
1060         /* having to loop on scene OR group objects is NOT FUN */
1061         if (GS(id->name) == ID_SCE) {
1062                 sce = (Scene *)id;
1063                 lay= sce->lay;
1064                 base= sce->base.first;
1065         } else {
1066                 group = (Group *)id;
1067                 lay= group->layer;
1068                 go = group->gobject.first;
1069         }
1070         
1071         /* Start looping on Scene OR Group objects */
1072         while (base || go) { 
1073                 if (sce) {
1074                         ob_iter= base->object;
1075                         oblay = base->lay;
1076                 } else {
1077                         ob_iter= go->ob;
1078                         oblay = ob_iter->lay;
1079                 }
1080                 
1081                 if (lay & oblay && scene->obedit!=ob_iter) {
1082                         ob=ob_iter->parent;
1083                         while(ob) {
1084                                 if(ob==par) {
1085                                         ob = ob_iter;
1086         /* End Scene/Group object loop, below is generic */
1087                                         
1088                                         /* par_space_mat - only used for groups so we can modify the space dupli's are in
1089                                            when par_space_mat is NULL ob->obmat can be used instead of ob__obmat
1090                                         */
1091                                         if(par_space_mat)
1092                                                 mul_m4_m4m4(ob__obmat, ob->obmat, par_space_mat);
1093                                         else
1094                                                 copy_m4_m4(ob__obmat, ob->obmat);
1095                                         
1096                                         copy_m3_m4(imat, ob->parentinv);
1097                                                 
1098                                         /* mballs have a different dupli handling */
1099                                         if(ob->type!=OB_MBALL) ob->flag |= OB_DONE;     /* doesnt render */
1100
1101                                         for(a=0; a<totface; a++) {
1102                                                 int mv1 = mface[a].v1;
1103                                                 int mv2 = mface[a].v2;
1104                                                 int mv3 = mface[a].v3;
1105                                                 int mv4 = mface[a].v4;
1106                                                 float *v1= mvert[mv1].co;
1107                                                 float *v2= mvert[mv2].co;
1108                                                 float *v3= mvert[mv3].co;
1109                                                 float *v4= (mv4)? mvert[mv4].co: NULL;
1110                                                 float cent[3], quat[4], mat[3][3], mat3[3][3], tmat[4][4], obmat[4][4];
1111
1112                                                 /* translation */
1113                                                 if(v4)
1114                                                         cent_quad_v3(cent, v1, v2, v3, v4);
1115                                                 else
1116                                                         cent_tri_v3(cent, v1, v2, v3);
1117                                                 mul_m4_v3(pmat, cent);
1118                                                 
1119                                                 sub_v3_v3v3(cent, cent, pmat[3]);
1120                                                 add_v3_v3(cent, ob__obmat[3]);
1121                                                 
1122                                                 copy_m4_m4(obmat, ob__obmat);
1123                                                 
1124                                                 VECCOPY(obmat[3], cent);
1125                                                 
1126                                                 /* rotation */
1127                                                 tri_to_quat( quat,v1, v2, v3);
1128                                                 quat_to_mat3( mat,quat);
1129                                                 
1130                                                 /* scale */
1131                                                 if(par->transflag & OB_DUPLIFACES_SCALE) {
1132                                                         float size= v4? area_quad_v3(v1, v2, v3, v4): area_tri_v3(v1, v2, v3);
1133                                                         size= sqrtf(size) * par->dupfacesca;
1134                                                         mul_m3_fl(mat, size);
1135                                                 }
1136                                                 
1137                                                 copy_m3_m3(mat3, mat);
1138                                                 mul_m3_m3m3(mat, imat, mat3);
1139                                                 
1140                                                 copy_m4_m4(tmat, obmat);
1141                                                 mul_m4_m4m3(obmat, tmat, mat);
1142                                                 
1143                                                 dob= new_dupli_object(lb, ob, obmat, par->lay, a, OB_DUPLIFACES, animated);
1144                                                 if(G.rendering) {
1145                                                         w= (mv4)? 0.25f: 1.0f/3.0f;
1146
1147                                                         if(orco) {
1148                                                                 madd_v3_v3v3fl(dob->orco, dob->orco, orco[mv1], w);
1149                                                                 madd_v3_v3v3fl(dob->orco, dob->orco, orco[mv2], w);
1150                                                                 madd_v3_v3v3fl(dob->orco, dob->orco, orco[mv3], w);
1151                                                                 if(mv4)
1152                                                                         madd_v3_v3v3fl(dob->orco, dob->orco, orco[mv4], w);
1153                                                         }
1154
1155                                                         if(mtface) {
1156                                                                 dob->uv[0] += w*mtface[a].uv[0][0];
1157                                                                 dob->uv[1] += w*mtface[a].uv[0][1];
1158                                                                 dob->uv[0] += w*mtface[a].uv[1][0];
1159                                                                 dob->uv[1] += w*mtface[a].uv[1][1];
1160                                                                 dob->uv[0] += w*mtface[a].uv[2][0];
1161                                                                 dob->uv[1] += w*mtface[a].uv[2][1];
1162
1163                                                                 if(mv4) {
1164                                                                         dob->uv[0] += w*mtface[a].uv[3][0];
1165                                                                         dob->uv[1] += w*mtface[a].uv[3][1];
1166                                                                 }
1167                                                         }
1168                                                 }
1169                                                 
1170                                                 if(ob->transflag & OB_DUPLI) {
1171                                                         float tmpmat[4][4];
1172                                                         copy_m4_m4(tmpmat, ob->obmat);
1173                                                         copy_m4_m4(ob->obmat, obmat); /* pretend we are really this mat */
1174                                                         object_duplilist_recursive((ID *)id, scene, ob, lb, ob->obmat, level+1, animated);
1175                                                         copy_m4_m4(ob->obmat, tmpmat);
1176                                                 }
1177                                         }
1178                                         
1179                                         break;
1180                                 }
1181                                 ob= ob->parent;
1182                         }
1183                 }
1184                 if (sce)        base= base->next;       /* scene loop */
1185                 else            go= go->next;           /* group loop */
1186         }
1187         
1188         if(em) {
1189                 MEM_freeN(mface);
1190                 MEM_freeN(mvert);
1191         }
1192
1193         if(orco)
1194                 MEM_freeN(orco);
1195         
1196         dm->release(dm);
1197 }
1198
1199 static void new_particle_duplilist(ListBase *lb, ID *id, Scene *scene, Object *par, float par_space_mat[][4], ParticleSystem *psys, int level, int animated)
1200 {
1201         GroupObject *go;
1202         Object *ob=NULL, **oblist=NULL, obcopy, *obcopylist=NULL;
1203         DupliObject *dob;
1204         ParticleDupliWeight *dw;
1205         ParticleSettings *part;
1206         ParticleData *pa;
1207         ChildParticle *cpa=NULL;
1208         ParticleKey state;
1209         ParticleCacheKey *cache;
1210         float ctime, pa_time, scale = 1.0f;
1211         float tmat[4][4], mat[4][4], pamat[4][4], vec[3], size=0.0;
1212         float (*obmat)[4], (*oldobmat)[4];
1213         int a, b, counter, hair = 0;
1214         int totpart, totchild, totgroup=0 /*, pa_num */;
1215
1216         int no_draw_flag = PARS_UNEXIST;
1217
1218         if(psys==NULL) return;
1219         
1220         /* simple preventing of too deep nested groups */
1221         if(level>MAX_DUPLI_RECUR) return;
1222         
1223         part=psys->part;
1224
1225         if(part==NULL)
1226                 return;
1227
1228         if(!psys_check_enabled(par, psys))
1229                 return;
1230
1231         if(G.rendering == 0)
1232                 no_draw_flag |= PARS_NO_DISP;
1233         
1234         ctime = bsystem_time(scene, par, (float)scene->r.cfra, 0.0);
1235
1236         totpart = psys->totpart;
1237         totchild = psys->totchild;
1238
1239         BLI_srandom(31415926 + psys->seed);
1240
1241         if((psys->renderdata || part->draw_as==PART_DRAW_REND) && ELEM(part->ren_as, PART_DRAW_OB, PART_DRAW_GR)) {
1242                 ParticleSimulationData sim= {NULL};
1243                 sim.scene= scene;
1244                 sim.ob= par;
1245                 sim.psys= psys;
1246                 sim.psmd= psys_get_modifier(par, psys);
1247                 /* make sure emitter imat is in global coordinates instead of render view coordinates */
1248                 invert_m4_m4(par->imat, par->obmat);
1249
1250                 /* first check for loops (particle system object used as dupli object) */
1251                 if(part->ren_as == PART_DRAW_OB) {
1252                         if(ELEM(part->dup_ob, NULL, par))
1253                                 return;
1254                 }
1255                 else { /*PART_DRAW_GR */
1256                         if(part->dup_group == NULL || part->dup_group->gobject.first == NULL)
1257                                 return;
1258
1259                         for(go=part->dup_group->gobject.first; go; go=go->next)
1260                                 if(go->ob == par)
1261                                         return;
1262                 }
1263
1264                 /* if we have a hair particle system, use the path cache */
1265                 if(part->type == PART_HAIR) {
1266                         if(psys->flag & PSYS_HAIR_DONE)
1267                                 hair= (totchild == 0 || psys->childcache) && psys->pathcache;
1268                         if(!hair)
1269                                 return;
1270                         
1271                         /* we use cache, update totchild according to cached data */
1272                         totchild = psys->totchildcache;
1273                         totpart = psys->totcached;
1274                 }
1275
1276                 psys_check_group_weights(part);
1277
1278                 psys->lattice = psys_get_lattice(&sim);
1279
1280                 /* gather list of objects or single object */
1281                 if(part->ren_as==PART_DRAW_GR) {
1282                         group_handle_recalc_and_update(scene, par, part->dup_group);
1283
1284                         if(part->draw & PART_DRAW_COUNT_GR) {
1285                                 for(dw=part->dupliweights.first; dw; dw=dw->next)
1286                                         totgroup += dw->count;
1287                         }
1288                         else {
1289                                 for(go=part->dup_group->gobject.first; go; go=go->next)
1290                                         totgroup++;
1291                         }
1292
1293                         /* we also copy the actual objects to restore afterwards, since
1294                          * where_is_object_time will change the object which breaks transform */
1295                         oblist = MEM_callocN(totgroup*sizeof(Object *), "dupgroup object list");
1296                         obcopylist = MEM_callocN(totgroup*sizeof(Object), "dupgroup copy list");
1297
1298                         
1299                         if(part->draw & PART_DRAW_COUNT_GR && totgroup) {
1300                                 dw = part->dupliweights.first;
1301
1302                                 for(a=0; a<totgroup; dw=dw->next) {
1303                                         for(b=0; b<dw->count; b++, a++) {
1304                                                 oblist[a] = dw->ob;
1305                                                 obcopylist[a] = *dw->ob;
1306                                         }
1307                                 }
1308                         }
1309                         else {
1310                                 go = part->dup_group->gobject.first;
1311                                 for(a=0; a<totgroup; a++, go=go->next) {
1312                                         oblist[a] = go->ob;
1313                                         obcopylist[a] = *go->ob;
1314                                 }
1315                         }
1316                 }
1317                 else {
1318                         ob = part->dup_ob;
1319                         obcopy = *ob;
1320                 }
1321
1322                 if(totchild==0 || part->draw & PART_DRAW_PARENT)
1323                         a = 0;
1324                 else
1325                         a = totpart;
1326
1327                 for(pa=psys->particles,counter=0; a<totpart+totchild; a++,pa++,counter++) {
1328                         if(a<totpart) {
1329                                 /* handle parent particle */
1330                                 if(pa->flag & no_draw_flag)
1331                                         continue;
1332
1333                                 /* pa_num = pa->num; */ /* UNUSED */
1334                                 pa_time = pa->time;
1335                                 size = pa->size;
1336                         }
1337                         else {
1338                                 /* handle child particle */
1339                                 cpa = &psys->child[a - totpart];
1340
1341                                 /* pa_num = a; */ /* UNUSED */
1342                                 pa_time = psys->particles[cpa->parent].time;
1343                                 size = psys_get_child_size(psys, cpa, ctime, NULL);
1344                         }
1345
1346                         /* some hair paths might be non-existent so they can't be used for duplication */
1347                         if(hair &&
1348                                 ((a < totpart && psys->pathcache[a]->steps < 0) ||
1349                                 (a >= totpart && psys->childcache[a-totpart]->steps < 0)))
1350                                 continue;
1351
1352                         if(part->ren_as==PART_DRAW_GR) {
1353                                 /* prevent divide by zero below [#28336] */
1354                                 if(totgroup == 0)
1355                                         continue;
1356
1357                                 /* for groups, pick the object based on settings */
1358                                 if(part->draw&PART_DRAW_RAND_GR)
1359                                         b= BLI_rand() % totgroup;
1360                                 else
1361                                         b= a % totgroup;
1362
1363                                 ob = oblist[b];
1364                                 obmat = oblist[b]->obmat;
1365                                 oldobmat = obcopylist[b].obmat;
1366                         }
1367                         else {
1368                                 obmat= ob->obmat;
1369                                 oldobmat= obcopy.obmat;
1370                         }
1371
1372                         if(hair) {
1373                                 /* hair we handle separate and compute transform based on hair keys */
1374                                 if(a < totpart) {
1375                                         cache = psys->pathcache[a];
1376                                         psys_get_dupli_path_transform(&sim, pa, NULL, cache, pamat, &scale);
1377                                 }
1378                                 else {
1379                                         cache = psys->childcache[a-totpart];
1380                                         psys_get_dupli_path_transform(&sim, NULL, cpa, cache, pamat, &scale);
1381                                 }
1382
1383                                 VECCOPY(pamat[3], cache->co);
1384                                 pamat[3][3]= 1.0f;
1385                                 
1386                         }
1387                         else {
1388                                 /* first key */
1389                                 state.time = ctime;
1390                                 if(psys_get_particle_state(&sim, a, &state, 0) == 0) {
1391                                         continue;
1392                                 }
1393                                 else {
1394                                         float tquat[4];
1395                                         normalize_qt_qt(tquat, state.rot);
1396                                         quat_to_mat4(pamat, tquat);
1397                                         copy_v3_v3(pamat[3], state.co);
1398                                         pamat[3][3]= 1.0f;
1399                                 }
1400                         }
1401
1402                         if(part->ren_as==PART_DRAW_GR && psys->part->draw & PART_DRAW_WHOLE_GR) {
1403                                 for(go= part->dup_group->gobject.first, b=0; go; go= go->next, b++) {
1404
1405                                         /* group dupli offset, should apply after everything else */
1406                                         if(!is_zero_v3(part->dup_group->dupli_ofs)) {
1407                                                 copy_m4_m4(tmat, oblist[b]->obmat);
1408                                                 sub_v3_v3v3(tmat[3], tmat[3], part->dup_group->dupli_ofs);
1409                                                 mul_m4_m4m4(tmat, tmat, pamat);
1410                                         }
1411                                         else {
1412                                                 mul_m4_m4m4(tmat, oblist[b]->obmat, pamat);
1413                                         }
1414
1415                                         mul_mat3_m4_fl(tmat, size*scale);
1416                                         if(par_space_mat)
1417                                                 mul_m4_m4m4(mat, tmat, par_space_mat);
1418                                         else
1419                                                 copy_m4_m4(mat, tmat);
1420
1421                                         dob= new_dupli_object(lb, go->ob, mat, par->lay, counter, OB_DUPLIPARTS, animated);
1422                                         copy_m4_m4(dob->omat, obcopylist[b].obmat);
1423                                         if(G.rendering)
1424                                                 psys_get_dupli_texture(psys, part, sim.psmd, pa, cpa, dob->uv, dob->orco);
1425                                 }
1426                         }
1427                         else {
1428                                 /* to give ipos in object correct offset */
1429                                 where_is_object_time(scene, ob, ctime-pa_time);
1430
1431                                 VECCOPY(vec, obmat[3]);
1432                                 obmat[3][0] = obmat[3][1] = obmat[3][2] = 0.0f;
1433
1434                                 /* particle rotation uses x-axis as the aligned axis, so pre-rotate the object accordingly */
1435                                 if((part->draw & PART_DRAW_ROTATE_OB) == 0) {
1436                                         float xvec[3], q[4];
1437                                         xvec[0] = -1.f;
1438                                         xvec[1] = xvec[2] = 0;
1439                                         vec_to_quat(q, xvec, ob->trackflag, ob->upflag);
1440                                         quat_to_mat4(obmat, q);
1441                                         obmat[3][3]= 1.0f;
1442                                 }
1443                                 
1444                                 /* Normal particles and cached hair live in global space so we need to
1445                                  * remove the real emitter's transformation before 2nd order duplication.
1446                                  */
1447                                 if(par_space_mat && GS(id->name) != ID_GR)
1448                                         mul_m4_m4m4(mat, pamat, psys->imat);
1449                                 else
1450                                         copy_m4_m4(mat, pamat);
1451
1452                                 mul_m4_m4m4(tmat, obmat, mat);
1453                                 mul_mat3_m4_fl(tmat, size*scale);
1454
1455                                 if(par_space_mat)
1456                                         mul_m4_m4m4(mat, tmat, par_space_mat);
1457                                 else
1458                                         copy_m4_m4(mat, tmat);
1459
1460                                 if(part->draw & PART_DRAW_GLOBAL_OB)
1461                                         add_v3_v3v3(mat[3], mat[3], vec);
1462
1463                                 dob= new_dupli_object(lb, ob, mat, ob->lay, counter, GS(id->name) == ID_GR ? OB_DUPLIGROUP : OB_DUPLIPARTS, animated);
1464                                 copy_m4_m4(dob->omat, oldobmat);
1465                                 if(G.rendering)
1466                                         psys_get_dupli_texture(psys, part, sim.psmd, pa, cpa, dob->uv, dob->orco);
1467                         }
1468                 }
1469
1470                 /* restore objects since they were changed in where_is_object_time */
1471                 if(part->ren_as==PART_DRAW_GR) {
1472                         for(a=0; a<totgroup; a++)
1473                                 *(oblist[a])= obcopylist[a];
1474                 }
1475                 else
1476                         *ob= obcopy;
1477         }
1478
1479         /* clean up */
1480         if(oblist)
1481                 MEM_freeN(oblist);
1482         if(obcopylist)
1483                 MEM_freeN(obcopylist);
1484
1485         if(psys->lattice) {
1486                 end_latt_deform(psys->lattice);
1487                 psys->lattice = NULL;
1488         }
1489 }
1490
1491 static Object *find_family_object(Object **obar, char *family, char ch)
1492 {
1493         Object *ob;
1494         int flen;
1495         
1496         if( obar[(int)ch] ) return obar[(int)ch];
1497         
1498         flen= strlen(family);
1499         
1500         ob= G.main->object.first;
1501         while(ob) {
1502                 if( ob->id.name[flen+2]==ch ) {
1503                         if( strncmp(ob->id.name+2, family, flen)==0 ) break;
1504                 }
1505                 ob= ob->id.next;
1506         }
1507         
1508         obar[(int)ch]= ob;
1509         
1510         return ob;
1511 }
1512
1513
1514 static void font_duplilist(ListBase *lb, Scene *scene, Object *par, int level, int animated)
1515 {
1516         Object *ob, *obar[256]= {NULL};
1517         Curve *cu;
1518         struct chartrans *ct, *chartransdata;
1519         float vec[3], obmat[4][4], pmat[4][4], fsize, xof, yof;
1520         int slen, a;
1521         
1522         /* simple preventing of too deep nested groups */
1523         if(level>MAX_DUPLI_RECUR) return;
1524         
1525         copy_m4_m4(pmat, par->obmat);
1526         
1527         /* in par the family name is stored, use this to find the other objects */
1528         
1529         chartransdata= BKE_text_to_curve(G.main, scene, par, FO_DUPLI);
1530         if(chartransdata==NULL) return;
1531
1532         cu= par->data;
1533         slen= strlen(cu->str);
1534         fsize= cu->fsize;
1535         xof= cu->xof;
1536         yof= cu->yof;
1537         
1538         ct= chartransdata;
1539         
1540         for(a=0; a<slen; a++, ct++) {
1541                 
1542                 ob= find_family_object(obar, cu->family, cu->str[a]);
1543                 if(ob) {
1544                         vec[0]= fsize*(ct->xof - xof);
1545                         vec[1]= fsize*(ct->yof - yof);
1546                         vec[2]= 0.0;
1547                         
1548                         mul_m4_v3(pmat, vec);
1549                         
1550                         copy_m4_m4(obmat, par->obmat);
1551                         VECCOPY(obmat[3], vec);
1552                         
1553                         new_dupli_object(lb, ob, obmat, par->lay, a, OB_DUPLIVERTS, animated);
1554                 }
1555         }
1556         
1557         MEM_freeN(chartransdata);
1558 }
1559
1560 /* ------------- */
1561
1562 static void object_duplilist_recursive(ID *id, Scene *scene, Object *ob, ListBase *duplilist, float par_space_mat[][4], int level, int animated)
1563 {       
1564         if((ob->transflag & OB_DUPLI)==0)
1565                 return;
1566         
1567         /* Should the dupli's be generated for this object? - Respect restrict flags */
1568         if (G.rendering) {
1569                 if (ob->restrictflag & OB_RESTRICT_RENDER) {
1570                         return;
1571                 }
1572         } else {
1573                 if (ob->restrictflag & OB_RESTRICT_VIEW) {
1574                         return;
1575                 }
1576         }
1577
1578         if(ob->transflag & OB_DUPLIPARTS) {
1579                 ParticleSystem *psys = ob->particlesystem.first;
1580                 for(; psys; psys=psys->next)
1581                         new_particle_duplilist(duplilist, id, scene, ob, par_space_mat, psys, level+1, animated);
1582         }
1583         else if(ob->transflag & OB_DUPLIVERTS) {
1584                 if(ob->type==OB_MESH) {
1585                         vertex_duplilist(duplilist, id, scene, ob, par_space_mat, level+1, animated);
1586                 }
1587                 else if(ob->type==OB_FONT) {
1588                         if (GS(id->name)==ID_SCE) { /* TODO - support dupligroups */
1589                                 font_duplilist(duplilist, scene, ob, level+1, animated);
1590                         }
1591                 }
1592         }
1593         else if(ob->transflag & OB_DUPLIFACES) {
1594                 if(ob->type==OB_MESH)
1595                         face_duplilist(duplilist, id, scene, ob, par_space_mat, level+1, animated);
1596         }
1597         else if(ob->transflag & OB_DUPLIFRAMES) {
1598                 if (GS(id->name)==ID_SCE) { /* TODO - support dupligroups */
1599                         frames_duplilist(duplilist, scene, ob, level+1, animated);
1600                 }
1601         } else if(ob->transflag & OB_DUPLIGROUP) {
1602                 DupliObject *dob;
1603                 
1604                 group_duplilist(duplilist, scene, ob, level+1, animated); /* now recursive */
1605
1606                 if (level==0) {
1607                         for(dob= duplilist->first; dob; dob= dob->next)
1608                                 if(dob->type == OB_DUPLIGROUP)
1609                                         copy_m4_m4(dob->ob->obmat, dob->mat);
1610                 }
1611         }
1612 }
1613
1614 /* Returns a list of DupliObject
1615  * note; group dupli's already set transform matrix. see note in group_duplilist() */
1616 ListBase *object_duplilist(Scene *sce, Object *ob)
1617 {
1618         ListBase *duplilist= MEM_mallocN(sizeof(ListBase), "duplilist");
1619         duplilist->first= duplilist->last= NULL;
1620         object_duplilist_recursive((ID *)sce, sce, ob, duplilist, NULL, 0, 0);
1621         return duplilist;
1622 }
1623
1624 void free_object_duplilist(ListBase *lb)
1625 {
1626         DupliObject *dob;
1627         
1628         /* loop in reverse order, if object is instanced multiple times
1629            the original layer may not really be original otherwise, proper
1630            solution is more complicated */
1631         for(dob= lb->last; dob; dob= dob->prev) {
1632                 dob->ob->lay= dob->origlay;
1633                 copy_m4_m4(dob->ob->obmat, dob->omat);
1634         }
1635         
1636         BLI_freelistN(lb);
1637         MEM_freeN(lb);
1638 }
1639
1640 int count_duplilist(Object *ob)
1641 {
1642         if(ob->transflag & OB_DUPLI) {
1643                 if(ob->transflag & OB_DUPLIVERTS) {
1644                         if(ob->type==OB_MESH) {
1645                                 if(ob->transflag & OB_DUPLIVERTS) {
1646                                         ParticleSystem *psys = ob->particlesystem.first;
1647                                         int pdup=0;
1648
1649                                         for(; psys; psys=psys->next)
1650                                                 pdup += psys->totpart;
1651
1652                                         if(pdup==0){
1653                                                 Mesh *me= ob->data;
1654                                                 return me->totvert;
1655                                         }
1656                                         else
1657                                                 return pdup;
1658                                 }
1659                         }
1660                 }
1661                 else if(ob->transflag & OB_DUPLIFRAMES) {
1662                         int tot= ob->dupend - ob->dupsta; 
1663                         tot/= (ob->dupon+ob->dupoff);
1664                         return tot*ob->dupon;
1665                 }
1666         }
1667         return 1;
1668 }