anim.c

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/* anim.c
 *
 *
 * $Id: anim.c 38141 2011-07-06 10:05:27Z blendix $
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <stdio.h>
#include <math.h>
#include <string.h>

#include "MEM_guardedalloc.h"

#include "BLI_blenlib.h"
#include "BLI_editVert.h"
#include "BLI_math.h"
#include "BLI_rand.h"
#include "BLI_utildefines.h"

#include "DNA_anim_types.h"
#include "DNA_armature_types.h"
#include "DNA_group_types.h"
#include "DNA_key_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_scene_types.h"
#include "DNA_vfont_types.h"

#include "BKE_animsys.h"
#include "BKE_curve.h"
#include "BKE_DerivedMesh.h"
#include "BKE_depsgraph.h"
#include "BKE_font.h"
#include "BKE_group.h"
#include "BKE_global.h"
#include "BKE_key.h"
#include "BKE_lattice.h"
#include "BKE_main.h"
#include "BKE_mesh.h"
#include "BKE_object.h"
#include "BKE_particle.h"
#include "BKE_scene.h"
#include "BKE_utildefines.h"
#include "BKE_depsgraph.h"
#include "BKE_anim.h"


// XXX bad level call...

/* --------------------- */
/* forward declarations */

static void object_duplilist_recursive(ID *id, Scene *scene, Object *ob, ListBase *duplilist, float par_space_mat[][4], int level, int animated);

/* ******************************************************************** */
/* Animation Visualisation */

/* Initialise the default settings for animation visualisation */
void animviz_settings_init(bAnimVizSettings *avs)
{
        /* sanity check */
        if (avs == NULL)
                return;
                
        /* ghosting settings */
        avs->ghost_bc= avs->ghost_ac= 10;
        
        avs->ghost_sf= 1; // xxx - take from scene instead?
        avs->ghost_ef= 250; // xxx - take from scene instead?
        
        avs->ghost_step= 1;
        
        
        /* path settings */
        avs->path_bc= avs->path_ac= 10;
        
        avs->path_sf= 1; // xxx - take from scene instead?
        avs->path_ef= 250; // xxx - take from scene instead?
        
        avs->path_viewflag= (MOTIONPATH_VIEW_KFRAS|MOTIONPATH_VIEW_KFNOS);
        
        avs->path_step= 1;
}

/* ------------------- */

/* Free the given motion path's cache */
void animviz_free_motionpath_cache(bMotionPath *mpath) 
{
        /* sanity check */
        if (mpath == NULL) 
                return;
                
        /* free the path if necessary */
        if (mpath->points)
                MEM_freeN(mpath->points);
        
        /* reset the relevant parameters */
        mpath->points= NULL;
        mpath->length= 0;
}

/* Free the given motion path instance and its data 
 * NOTE: this frees the motion path given!
 */
void animviz_free_motionpath(bMotionPath *mpath)
{
        /* sanity check */
        if (mpath == NULL)
                return;
        
        /* free the cache first */
        animviz_free_motionpath_cache(mpath);
        
        /* now the instance itself */
        MEM_freeN(mpath);
}

/* ------------------- */

/* Setup motion paths for the given data
 *      - scene: current scene (for frame ranges, etc.)
 *      - ob: object to add paths for (must be provided)
 *      - pchan: posechannel to add paths for (optional; if not provided, object-paths are assumed)
 */
bMotionPath *animviz_verify_motionpaths(Scene *scene, Object *ob, bPoseChannel *pchan)
{
        bAnimVizSettings *avs;
        bMotionPath *mpath, **dst;
        
        /* sanity checks */
        if (ELEM(NULL, scene, ob))
                return NULL;
                
        /* get destination data */
        if (pchan) {
                /* paths for posechannel - assume that posechannel belongs to the object */
                avs= &ob->pose->avs;
                dst= &pchan->mpath;
        }
        else {
                /* paths for object */
                avs= &ob->avs;
                dst= &ob->mpath;
        }

        /* avoid 0 size allocs */
        if(avs->path_sf >= avs->path_ef) {
                return NULL;
        }

        /* if there is already a motionpath, just return that,
         * but provided it's settings are ok 
         */
        if (*dst != NULL) {
                mpath= *dst;
                
                /* if range is not invalid, and/or length is set ok, just return */
                if ((mpath->start_frame != mpath->end_frame) && (mpath->length > 0))
                        return mpath;
        }
        else {
                /* create a new motionpath, and assign it */
                mpath= MEM_callocN(sizeof(bMotionPath), "bMotionPath");
                *dst= mpath;
        }
        
        /* set settings from the viz settings */
        mpath->start_frame= avs->path_sf;
        mpath->end_frame= avs->path_ef;
        
        mpath->length= mpath->end_frame - mpath->start_frame;
        
        if (avs->path_bakeflag & MOTIONPATH_BAKE_HEADS)
                mpath->flag |= MOTIONPATH_FLAG_BHEAD;
        else
                mpath->flag &= ~MOTIONPATH_FLAG_BHEAD;
        
        /* allocate a cache */
        mpath->points= MEM_callocN(sizeof(bMotionPathVert)*mpath->length, "bMotionPathVerts");
        
        /* tag viz settings as currently having some path(s) which use it */
        avs->path_bakeflag |= MOTIONPATH_BAKE_HAS_PATHS;
        
        /* return it */
        return mpath;
}

/* ------------------- */

/* Motion path needing to be baked (mpt) */
typedef struct MPathTarget {
        struct MPathTarget *next, *prev;
        
        bMotionPath *mpath;                     /* motion path in question */
        
        Object *ob;                                     /* source object */
        bPoseChannel *pchan;            /* source posechannel (if applicable) */
} MPathTarget;

/* ........ */

/* get list of motion paths to be baked for the given object
 *      - assumes the given list is ready to be used
 */
void animviz_get_object_motionpaths(Object *ob, ListBase *targets)
{
        MPathTarget *mpt;
        
        /* object itself first */
        if ((ob->avs.recalc & ANIMVIZ_RECALC_PATHS) && (ob->mpath)) {
                /* new target for object */
                mpt= MEM_callocN(sizeof(MPathTarget), "MPathTarget Ob");
                BLI_addtail(targets, mpt);
                
                mpt->mpath= ob->mpath;
                mpt->ob= ob;
        }
        
        /* bones */
        if ((ob->pose) && (ob->pose->avs.recalc & ANIMVIZ_RECALC_PATHS)) {
                bArmature *arm= ob->data;
                bPoseChannel *pchan;
                
                for (pchan= ob->pose->chanbase.first; pchan; pchan= pchan->next) {
                        if ((pchan->bone) && (arm->layer & pchan->bone->layer) && (pchan->mpath)) {
                                /* new target for bone */
                                mpt= MEM_callocN(sizeof(MPathTarget), "MPathTarget PoseBone");
                                BLI_addtail(targets, mpt);
                                
                                mpt->mpath= pchan->mpath;
                                mpt->ob= ob;
                                mpt->pchan= pchan;
                        }
                }
        }
}

/* ........ */

/* Note on evaluation optimisations:
 * Optimisations currently used here play tricks with the depsgraph in order to try and 
 * evaluate as few objects as strictly necessary to get nicer performance under standard
 * production conditions. For those people who really need the accurate version, 
 * disable the ifdef (i.e. 1 -> 0) and comment out the call to motionpaths_calc_optimise_depsgraph()
 */

/* tweak the object ordering to trick depsgraph into making MotionPath calculations run faster */
static void motionpaths_calc_optimise_depsgraph(Scene *scene, ListBase *targets)
{
        Base *base, *baseNext;
        MPathTarget *mpt;
        
        /* make sure our temp-tag isn't already in use */
        for (base= scene->base.first; base; base= base->next)
                base->object->flag &= ~BA_TEMP_TAG;
        
        /* for each target, dump its object to the start of the list if it wasn't moved already */
        for (mpt= targets->first; mpt; mpt= mpt->next) {
                for (base=scene->base.first; base; base=baseNext) {
                        baseNext = base->next;
                        
                        if ((base->object == mpt->ob) && !(mpt->ob->flag & BA_TEMP_TAG)) {
                                BLI_remlink(&scene->base, base);
                                BLI_addhead(&scene->base, base);
                                
                                mpt->ob->flag |= BA_TEMP_TAG;
                                break; // we really don't need to continue anymore once this happens, but this line might really 'break'
                        }
                }
        }
        
        /* "brew me a list that's sorted a bit faster now depsy" */
        DAG_scene_sort(G.main, scene);
}

/* update scene for current frame */
static void motionpaths_calc_update_scene(Scene *scene)
{
#if 1 // 'production' optimisations always on
        Base *base, *last=NULL;
        
        /* only stuff that moves or needs display still */
        DAG_scene_update_flags(G.main, scene, scene->lay, TRUE);
        
        /* find the last object with the tag 
         *      - all those afterwards are assumed to not be relevant for our calculations
         */
        // optimise further by moving out...
        for (base=scene->base.first; base; base=base->next) {
                if (base->object->flag & BA_TEMP_TAG)
                        last = base;
        }
        
        /* perform updates for tagged objects */
        // XXX: this will break if rigs depend on scene or other data that 
        // is animated but not attached to/updatable from objects
        for (base=scene->base.first; base; base=base->next) {
                /* update this object */
                object_handle_update(scene, base->object);
                
                /* if this is the last one we need to update, let's stop to save some time */
                if (base == last)
                        break;
        }
#else // original, 'always correct' version
        /* do all updates 
         *      - if this is too slow, resort to using a more efficient way 
         *        that doesn't force complete update, but for now, this is the
         *        most accurate way!
         */
        scene_update_for_newframe(G.main, scene, scene->lay); // XXX this is the best way we can get anything moving
#endif
}

/* ........ */

/* perform baking for the targets on the current frame */
static void motionpaths_calc_bake_targets(Scene *scene, ListBase *targets)
{
        MPathTarget *mpt;
        
        /* for each target, check if it can be baked on the current frame */
        for (mpt= targets->first; mpt; mpt= mpt->next) {        
                bMotionPath *mpath= mpt->mpath;
                bMotionPathVert *mpv;
                
                /* current frame must be within the range the cache works for 
                 *      - is inclusive of the first frame, but not the last otherwise we get buffer overruns
                 */
                if ((CFRA < mpath->start_frame) || (CFRA >= mpath->end_frame))
                        continue;
                
                /* get the relevant cache vert to write to */
                mpv= mpath->points + (CFRA - mpath->start_frame);
                
                /* pose-channel or object path baking? */
                if (mpt->pchan) {
                        /* heads or tails */
                        if (mpath->flag & MOTIONPATH_FLAG_BHEAD) {
                                VECCOPY(mpv->co, mpt->pchan->pose_head);
                        }
                        else {
                                VECCOPY(mpv->co, mpt->pchan->pose_tail);
                        }
                        
                        /* result must be in worldspace */
                        mul_m4_v3(mpt->ob->obmat, mpv->co);
                }
                else {
                        /* worldspace object location */
                        VECCOPY(mpv->co, mpt->ob->obmat[3]);
                }
        }
}

/* Perform baking of the given object's and/or its bones' transforms to motion paths 
 *      - scene: current scene
 *      - ob: object whose flagged motionpaths should get calculated
 *      - recalc: whether we need to 
 */
// TODO: include reports pointer?
void animviz_calc_motionpaths(Scene *scene, ListBase *targets)
{
        MPathTarget *mpt;
        int sfra, efra;
        int cfra;
        
        /* sanity check */
        if (ELEM(NULL, targets, targets->first))
                return;
        
        /* set frame values */
        cfra = CFRA;
        sfra = efra = cfra;
        
        // TODO: this method could be improved...
        //      1) max range for standard baking
        //      2) minimum range for recalc baking (i.e. between keyframes, but how?)
        for (mpt= targets->first; mpt; mpt= mpt->next) {
                /* try to increase area to do (only as much as needed) */
                sfra= MIN2(sfra, mpt->mpath->start_frame);
                efra= MAX2(efra, mpt->mpath->end_frame);
        }
        if (efra <= sfra) return;
        
        /* optimise the depsgraph for faster updates */
        // TODO: whether this is used should depend on some setting for the level of optimisations used
        motionpaths_calc_optimise_depsgraph(scene, targets);
        
        /* calculate path over requested range */
        for (CFRA=sfra; CFRA<=efra; CFRA++) {
                /* update relevant data for new frame */
                motionpaths_calc_update_scene(scene);
                
                /* perform baking for targets */
                motionpaths_calc_bake_targets(scene, targets);
        }
        
        /* reset original environment */
        CFRA= cfra;
        motionpaths_calc_update_scene(scene);
        
        /* clear recalc flags from targets */
        for (mpt= targets->first; mpt; mpt= mpt->next) {
                bAnimVizSettings *avs;
                
                /* get pointer to animviz settings for each target */
                if (mpt->pchan)
                        avs= &mpt->ob->pose->avs;
                else    
                        avs= &mpt->ob->avs;
                
                /* clear the flag requesting recalculation of targets */
                avs->recalc &= ~ANIMVIZ_RECALC_PATHS;
        }
}

/* ******************************************************************** */
/* Curve Paths - for curve deforms and/or curve following */

/* free curve path data 
 * NOTE: frees the path itself!
 * NOTE: this is increasingly innacurate with non-uniform BevPoint subdivisions [#24633]
 */
void free_path(Path *path)
{
        if(path->data) MEM_freeN(path->data);
        MEM_freeN(path);
}

/* calculate a curve-deform path for a curve 
 *      - only called from displist.c -> do_makeDispListCurveTypes
 */
void calc_curvepath(Object *ob)
{
        BevList *bl;
        BevPoint *bevp, *bevpn, *bevpfirst, *bevplast;
        PathPoint *pp;
        Curve *cu;
        Nurb *nu;
        Path *path;
        float *fp, *dist, *maxdist, xyz[3];
        float fac, d=0, fac1, fac2;
        int a, tot, cycl=0;
        ListBase *nurbs;
        
        /* in a path vertices are with equal differences: path->len = number of verts */
        /* NOW WITH BEVELCURVE!!! */
        
        if(ob==NULL || ob->type != OB_CURVE) return;
        cu= ob->data;

        nurbs= BKE_curve_nurbs(cu);
        nu= nurbs->first;

        if(cu->path) free_path(cu->path);
        cu->path= NULL;
        
        bl= cu->bev.first;
        if(bl==NULL || !bl->nr) return;

        cu->path=path= MEM_callocN(sizeof(Path), "calc_curvepath");
        
        /* if POLY: last vertice != first vertice */
        cycl= (bl->poly!= -1);
        
        if(cycl) tot= bl->nr;
        else tot= bl->nr-1;
        
        path->len= tot+1;
        /* exception: vector handle paths and polygon paths should be subdivided at least a factor resolu */
        if(path->len<nu->resolu*SEGMENTSU(nu)) path->len= nu->resolu*SEGMENTSU(nu);
        
        dist= (float *)MEM_mallocN((tot+1)*4, "calcpathdist");

                /* all lengths in *dist */
        bevp= bevpfirst= (BevPoint *)(bl+1);
        fp= dist;
        *fp= 0;
        for(a=0; a<tot; a++) {
                fp++;
                if(cycl && a==tot-1)
                        sub_v3_v3v3(xyz, bevpfirst->vec, bevp->vec);
                else
                        sub_v3_v3v3(xyz, (bevp+1)->vec, bevp->vec);
                
                *fp= *(fp-1)+len_v3(xyz);
                bevp++;
        }
        
        path->totdist= *fp;
        
                /* the path verts  in path->data */
                /* now also with TILT value */
        pp= path->data = (PathPoint *)MEM_callocN(sizeof(PathPoint)*path->len, "pathdata");
        
        bevp= bevpfirst;
        bevpn= bevp+1;
        bevplast= bevpfirst + (bl->nr-1);
        fp= dist+1;
        maxdist= dist+tot;
        fac= 1.0f/((float)path->len-1.0f);
                fac = fac * path->totdist;
        
        for(a=0; a<path->len; a++) {
                
                d= ((float)a)*fac;
                
                /* we're looking for location (distance) 'd' in the array */
                while((d>= *fp) && fp<maxdist) {
                        fp++;
                        if(bevp<bevplast) bevp++;
                        bevpn= bevp+1;
                        if(bevpn>bevplast) {
                                if(cycl) bevpn= bevpfirst;
                                else bevpn= bevplast;
                        }
                }
                
                fac1= *(fp)- *(fp-1);
                fac2= *(fp)-d;
                fac1= fac2/fac1;
                fac2= 1.0f-fac1;
                
                interp_v3_v3v3(pp->vec, bevp->vec, bevpn->vec, fac2);
                pp->vec[3]= fac1*bevp->alfa + fac2*bevpn->alfa;
                pp->radius= fac1*bevp->radius + fac2*bevpn->radius;
                pp->weight= fac1*bevp->weight + fac2*bevpn->weight;
                interp_qt_qtqt(pp->quat, bevp->quat, bevpn->quat, fac2);
                normalize_qt(pp->quat);
                
                pp++;
        }
        
        MEM_freeN(dist);
}


/* is this only used internally?*/
int interval_test(int min, int max, int p1, int cycl)
{
        if(cycl) {
                if(p1 < min) 
                        p1=  ((p1 -min) % (max-min+1)) + max+1;
                else if(p1 > max)
                        p1=  ((p1 -min) % (max-min+1)) + min;
        }
        else {
                if(p1 < min) p1= min;
                else if(p1 > max) p1= max;
        }
        return p1;
}


/* calculate the deformation implied by the curve path at a given parametric position, and returns whether this operation succeeded 
 *      - *vec needs FOUR items!
 *      - ctime is normalized range <0-1>
 */
int where_on_path(Object *ob, float ctime, float *vec, float *dir, float *quat, float *radius, float *weight)   /* returns OK */
{
        Curve *cu;
        Nurb *nu;
        BevList *bl;
        Path *path;
        PathPoint *pp, *p0, *p1, *p2, *p3;
        float fac;
        float data[4];
        int cycl=0, s0, s1, s2, s3;

        if(ob==NULL || ob->type != OB_CURVE) return 0;
        cu= ob->data;
        if(cu->path==NULL || cu->path->data==NULL) {
                printf("no path!\n");
                return 0;
        }
        path= cu->path;
        pp= path->data;
        
        /* test for cyclic */
        bl= cu->bev.first;
        if (!bl) return 0;
        if (!bl->nr) return 0;
        if(bl->poly> -1) cycl= 1;

        ctime *= (path->len-1);
        
        s1= (int)floor(ctime);
        fac= (float)(s1+1)-ctime;

        /* path->len is corected for cyclic */
        s0= interval_test(0, path->len-1-cycl, s1-1, cycl);
        s1= interval_test(0, path->len-1-cycl, s1, cycl);
        s2= interval_test(0, path->len-1-cycl, s1+1, cycl);
        s3= interval_test(0, path->len-1-cycl, s1+2, cycl);

        p0= pp + s0;
        p1= pp + s1;
        p2= pp + s2;
        p3= pp + s3;

        /* note, commented out for follow constraint */
        //if(cu->flag & CU_FOLLOW) {

                key_curve_tangent_weights(1.0f-fac, data, KEY_BSPLINE);

                interp_v3_v3v3v3v3(dir, p0->vec, p1->vec, p2->vec, p3->vec, data);

                /* make compatible with vectoquat */
                negate_v3(dir);
        //}
        
        nu= cu->nurb.first;

        /* make sure that first and last frame are included in the vectors here  */
        if(nu->type == CU_POLY) key_curve_position_weights(1.0f-fac, data, KEY_LINEAR);
        else if(nu->type == CU_BEZIER) key_curve_position_weights(1.0f-fac, data, KEY_LINEAR);
        else if(s0==s1 || p2==p3) key_curve_position_weights(1.0f-fac, data, KEY_CARDINAL);
        else key_curve_position_weights(1.0f-fac, data, KEY_BSPLINE);

        vec[0]= data[0]*p0->vec[0] + data[1]*p1->vec[0] + data[2]*p2->vec[0] + data[3]*p3->vec[0] ; /* X */
        vec[1]= data[0]*p0->vec[1] + data[1]*p1->vec[1] + data[2]*p2->vec[1] + data[3]*p3->vec[1] ; /* Y */
        vec[2]= data[0]*p0->vec[2] + data[1]*p1->vec[2] + data[2]*p2->vec[2] + data[3]*p3->vec[2] ; /* Z */
        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 */

        if (quat) {
                float totfac, q1[4], q2[4];

                totfac= data[0]+data[3];
                if(totfac>FLT_EPSILON)  interp_qt_qtqt(q1, p0->quat, p3->quat, data[3] / totfac);
                else                                    QUATCOPY(q1, p1->quat);

                totfac= data[1]+data[2];
                if(totfac>FLT_EPSILON)  interp_qt_qtqt(q2, p1->quat, p2->quat, data[2] / totfac);
                else                                    QUATCOPY(q2, p3->quat);

                totfac = data[0]+data[1]+data[2]+data[3];
                if(totfac>FLT_EPSILON)  interp_qt_qtqt(quat, q1, q2, (data[1]+data[2]) / totfac);
                else                                    QUATCOPY(quat, q2);
        }

        if(radius)
                *radius= data[0]*p0->radius + data[1]*p1->radius + data[2]*p2->radius + data[3]*p3->radius;

        if(weight)
                *weight= data[0]*p0->weight + data[1]*p1->weight + data[2]*p2->weight + data[3]*p3->weight;

        return 1;
}

/* ******************************************************************** */
/* Dupli-Geometry */

static DupliObject *new_dupli_object(ListBase *lb, Object *ob, float mat[][4], int lay, int index, int type, int animated)
{
        DupliObject *dob= MEM_callocN(sizeof(DupliObject), "dupliobject");
        
        BLI_addtail(lb, dob);
        dob->ob= ob;
        copy_m4_m4(dob->mat, mat);
        copy_m4_m4(dob->omat, ob->obmat);
        dob->origlay= ob->lay;
        dob->index= index;
        dob->type= type;
        dob->animated= (type == OB_DUPLIGROUP) && animated;
        ob->lay= lay;
        
        return dob;
}

static void group_duplilist(ListBase *lb, Scene *scene, Object *ob, int level, int animated)
{
        DupliObject *dob;
        Group *group;
        GroupObject *go;
        float mat[4][4], tmat[4][4];
        
        if(ob->dup_group==NULL) return;
        group= ob->dup_group;
        
        /* simple preventing of too deep nested groups */
        if(level>MAX_DUPLI_RECUR) return;
        
        /* handles animated groups, and */
        /* we need to check update for objects that are not in scene... */
        group_handle_recalc_and_update(scene, ob, group);
        animated= animated || group_is_animated(ob, group);
        
        for(go= group->gobject.first; go; go= go->next) {
                /* note, if you check on layer here, render goes wrong... it still deforms verts and uses parent imat */
                if(go->ob!=ob) {
                        
                        /* group dupli offset, should apply after everything else */
                        if(!is_zero_v3(group->dupli_ofs)) {
                                copy_m4_m4(tmat, go->ob->obmat);
                                sub_v3_v3v3(tmat[3], tmat[3], group->dupli_ofs);
                                mul_m4_m4m4(mat, tmat, ob->obmat);
                        }
                        else {
                                mul_m4_m4m4(mat, go->ob->obmat, ob->obmat);
                        }
                        
                        dob= new_dupli_object(lb, go->ob, mat, ob->lay, 0, OB_DUPLIGROUP, animated);

                        /* check the group instance and object layers match, also that the object visible flags are ok. */
                        if(     (dob->origlay & group->layer)==0 ||
                                (G.rendering==0 && dob->ob->restrictflag & OB_RESTRICT_VIEW) ||
                                (G.rendering && dob->ob->restrictflag & OB_RESTRICT_RENDER)
                        ) {
                                dob->no_draw= 1;
                        }
                        else {
                                dob->no_draw= 0;
                        }

                        if(go->ob->transflag & OB_DUPLI) {
                                copy_m4_m4(dob->ob->obmat, dob->mat);
                                object_duplilist_recursive(&group->id, scene, go->ob, lb, ob->obmat, level+1, animated);
                                copy_m4_m4(dob->ob->obmat, dob->omat);
                        }
                }
        }
}

static void frames_duplilist(ListBase *lb, Scene *scene, Object *ob, int level, int animated)
{
        extern int enable_cu_speed;     /* object.c */
        Object copyob = {{NULL}};
        int cfrao = scene->r.cfra;
        
        /* simple prevention of too deep nested groups */
        if (level > MAX_DUPLI_RECUR) return;
        
        /* if we don't have any data/settings which will lead to object movement,
         * don't waste time trying, as it will all look the same...
         */
        if (ob->parent==NULL && ob->constraints.first==NULL && ob->adt==NULL) 
                return;
        
        /* make a copy of the object's original data (before any dupli-data overwrites it) 
         * as we'll need this to keep track of unkeyed data
         *      - this doesn't take into account other data that can be reached from the object,
         *        for example it's shapekeys or bones, hence the need for an update flush at the end
         */
        copyob = *ob;
        
        /* duplicate over the required range */
        if (ob->transflag & OB_DUPLINOSPEED) enable_cu_speed= 0;
        
        for (scene->r.cfra= ob->dupsta; scene->r.cfra<=ob->dupend; scene->r.cfra++) {
                short ok= 1;
                
                /* - dupoff = how often a frames within the range shouldn't be made into duplis
                 * - dupon = the length of each "skipping" block in frames
                 */
                if (ob->dupoff) {
                        ok= scene->r.cfra - ob->dupsta;
                        ok= ok % (ob->dupon+ob->dupoff);
                        ok= (ok < ob->dupon);
                }
                
                if (ok) {       
                        DupliObject *dob;
                        
                        /* WARNING: doing animation updates in this way is not terribly accurate, as the dependencies
                         * and/or other objects which may affect this object's transforms are not updated either.
                         * However, this has always been the way that this worked (i.e. pre 2.5), so I guess that it'll be fine!
                         */
                        BKE_animsys_evaluate_animdata(&ob->id, ob->adt, (float)scene->r.cfra, ADT_RECALC_ANIM); /* ob-eval will do drivers, so we don't need to do them */
                        where_is_object_time(scene, ob, (float)scene->r.cfra);
                        
                        dob= new_dupli_object(lb, ob, ob->obmat, ob->lay, scene->r.cfra, OB_DUPLIFRAMES, animated);
                        copy_m4_m4(dob->omat, copyob.obmat);
                }
        }

        enable_cu_speed= 1;
        
        /* reset frame to original frame, then re-evaluate animation as above 
         * as 2.5 animation data may have far-reaching consequences
         */
        scene->r.cfra= cfrao;
        
        BKE_animsys_evaluate_animdata(&ob->id, ob->adt, (float)scene->r.cfra, ADT_RECALC_ANIM); /* ob-eval will do drivers, so we don't need to do them */
        where_is_object_time(scene, ob, (float)scene->r.cfra);
        
        /* but, to make sure unkeyed object transforms are still sane, 
         * let's copy object's original data back over
         */
        *ob = copyob;
}

typedef struct vertexDupliData {
        ID *id; /* scene or group, for recursive loops */
        int level;
        int animated;
        ListBase *lb;
        float pmat[4][4];
        float obmat[4][4]; /* Only used for dupliverts inside dupligroups, where the ob->obmat is modified */
        Scene *scene;
        Object *ob, *par;
        float (*orco)[3];
} vertexDupliData;

/* ------------- */

static void vertex_dupli__mapFunc(void *userData, int index, float *co, float *no_f, short *no_s)
{
        DupliObject *dob;
        vertexDupliData *vdd= userData;
        float vec[3], q2[4], mat[3][3], tmat[4][4], obmat[4][4];
        int origlay;
        
        mul_v3_m4v3(vec, vdd->pmat, co);
        sub_v3_v3(vec, vdd->pmat[3]);
        add_v3_v3(vec, vdd->obmat[3]);
        
        copy_m4_m4(obmat, vdd->obmat);
        VECCOPY(obmat[3], vec);
        
        if(vdd->par->transflag & OB_DUPLIROT) {
                if(no_f) {
                        vec[0]= -no_f[0]; vec[1]= -no_f[1]; vec[2]= -no_f[2];
                }
                else if(no_s) {
                        vec[0]= -no_s[0]; vec[1]= -no_s[1]; vec[2]= -no_s[2];
                }
                
                vec_to_quat( q2,vec, vdd->ob->trackflag, vdd->ob->upflag);
                
                quat_to_mat3( mat,q2);
                copy_m4_m4(tmat, obmat);
                mul_m4_m4m3(obmat, tmat, mat);
        }

        origlay = vdd->ob->lay;
        
        dob= new_dupli_object(vdd->lb, vdd->ob, obmat, vdd->par->lay, index, OB_DUPLIVERTS, vdd->animated);

        /* restore the original layer so that each dupli will have proper dob->origlay */
        vdd->ob->lay = origlay;

        if(vdd->orco)
                VECCOPY(dob->orco, vdd->orco[index]);
        
        if(vdd->ob->transflag & OB_DUPLI) {
                float tmpmat[4][4];
                copy_m4_m4(tmpmat, vdd->ob->obmat);
                copy_m4_m4(vdd->ob->obmat, obmat); /* pretend we are really this mat */
                object_duplilist_recursive((ID *)vdd->id, vdd->scene, vdd->ob, vdd->lb, obmat, vdd->level+1, vdd->animated);
                copy_m4_m4(vdd->ob->obmat, tmpmat);
        }
}

static void vertex_duplilist(ListBase *lb, ID *id, Scene *scene, Object *par, float par_space_mat[][4], int level, int animated)
{
        Object *ob, *ob_iter;
        Mesh *me= par->data;
        Base *base = NULL;
        DerivedMesh *dm;
        vertexDupliData vdd;
        Scene *sce = NULL;
        Group *group = NULL;
        GroupObject * go = NULL;
        EditMesh *em;
        float vec[3], no[3], pmat[4][4];
        int totvert, a, oblay;
        unsigned int lay;
        
        copy_m4_m4(pmat, par->obmat);
        
        /* simple preventing of too deep nested groups */
        if(level>MAX_DUPLI_RECUR) return;
        
        em = BKE_mesh_get_editmesh(me);
        
        if(em) {
                dm= editmesh_get_derived_cage(scene, par, em, CD_MASK_BAREMESH);
                BKE_mesh_end_editmesh(me, em);
        } else
                dm= mesh_get_derived_deform(scene, par, CD_MASK_BAREMESH);
        
        if(G.rendering) {
                vdd.orco= (float(*)[3])get_mesh_orco_verts(par);
                transform_mesh_orco_verts(me, vdd.orco, me->totvert, 0);
        }
        else
                vdd.orco= NULL;
        
        totvert = dm->getNumVerts(dm);

        /* having to loop on scene OR group objects is NOT FUN */
        if (GS(id->name) == ID_SCE) {
                sce = (Scene *)id;
                lay= sce->lay;
                base= sce->base.first;
        } else {
                group = (Group *)id;
                lay= group->layer;
                go = group->gobject.first;
        }
        
        /* Start looping on Scene OR Group objects */
        while (base || go) { 
                if (sce) {
                        ob_iter= base->object;
                        oblay = base->lay;
                } else {
                        ob_iter= go->ob;
                        oblay = ob_iter->lay;
                }
                
                if (lay & oblay && scene->obedit!=ob_iter) {
                        ob=ob_iter->parent;
                        while(ob) {
                                if(ob==par) {
                                        ob = ob_iter;
        /* End Scene/Group object loop, below is generic */
                                        
                                        
                                        /* par_space_mat - only used for groups so we can modify the space dupli's are in
                                           when par_space_mat is NULL ob->obmat can be used instead of ob__obmat
                                        */
                                        if(par_space_mat)
                                                mul_m4_m4m4(vdd.obmat, ob->obmat, par_space_mat);
                                        else
                                                copy_m4_m4(vdd.obmat, ob->obmat);

                                        vdd.id= id;
                                        vdd.level= level;
                                        vdd.animated= animated;
                                        vdd.lb= lb;
                                        vdd.ob= ob;
                                        vdd.scene= scene;
                                        vdd.par= par;
                                        copy_m4_m4(vdd.pmat, pmat);
                                        
                                        /* mballs have a different dupli handling */
                                        if(ob->type!=OB_MBALL) ob->flag |= OB_DONE;     /* doesnt render */

                                        if(me->edit_mesh) {
                                                dm->foreachMappedVert(dm, vertex_dupli__mapFunc, (void*) &vdd);
                                        }
                                        else {
                                                for(a=0; a<totvert; a++) {
                                                        dm->getVertCo(dm, a, vec);
                                                        dm->getVertNo(dm, a, no);
                                                        
                                                        vertex_dupli__mapFunc(&vdd, a, vec, no, NULL);
                                                }
                                        }
                                        if(sce) {
                                                /* Set proper layer in case of scene looping,
                                                 * in case of groups the object layer will be
                                                 * changed when it's duplicated due to the
                                                 * group duplication.
                                                 */
                                                ob->lay = vdd.par->lay;
                                        }
                                        
                                        break;
                                }
                                ob= ob->parent;
                        }
                }
                if (sce)        base= base->next;       /* scene loop */
                else            go= go->next;           /* group loop */
        }

        if(vdd.orco)
                MEM_freeN(vdd.orco);
        dm->release(dm);
}

static void face_duplilist(ListBase *lb, ID *id, Scene *scene, Object *par, float par_space_mat[][4], int level, int animated)
{
        Object *ob, *ob_iter;
        Base *base = NULL;
        DupliObject *dob;
        DerivedMesh *dm;
        Mesh *me= par->data;
        MTFace *mtface;
        MFace *mface;
        MVert *mvert;
        float pmat[4][4], imat[3][3], (*orco)[3] = NULL, w;
        int lay, oblay, totface, a;
        Scene *sce = NULL;
        Group *group = NULL;
        GroupObject *go = NULL;
        EditMesh *em;
        float ob__obmat[4][4]; /* needed for groups where the object matrix needs to be modified */
        
        /* simple preventing of too deep nested groups */
        if(level>MAX_DUPLI_RECUR) return;
        
        copy_m4_m4(pmat, par->obmat);
        
        em = BKE_mesh_get_editmesh(me);
        if(em) {
                int totvert;
                
                dm= editmesh_get_derived_cage(scene, par, em, CD_MASK_BAREMESH);
                
                totface= dm->getNumFaces(dm);
                mface= MEM_mallocN(sizeof(MFace)*totface, "mface temp");
                dm->copyFaceArray(dm, mface);
                totvert= dm->getNumVerts(dm);
                mvert= MEM_mallocN(sizeof(MVert)*totvert, "mvert temp");
                dm->copyVertArray(dm, mvert);

                BKE_mesh_end_editmesh(me, em);
        }
        else {
                dm = mesh_get_derived_deform(scene, par, CD_MASK_BAREMESH);
                
                totface= dm->getNumFaces(dm);
                mface= dm->getFaceArray(dm);
                mvert= dm->getVertArray(dm);
        }

        if(G.rendering) {

                orco= (float(*)[3])get_mesh_orco_verts(par);
                transform_mesh_orco_verts(me, orco, me->totvert, 0);
                mtface= me->mtface;
        }
        else {
                orco= NULL;
                mtface= NULL;
        }
        
        /* having to loop on scene OR group objects is NOT FUN */
        if (GS(id->name) == ID_SCE) {
                sce = (Scene *)id;
                lay= sce->lay;
                base= sce->base.first;
        } else {
                group = (Group *)id;
                lay= group->layer;
                go = group->gobject.first;
        }
        
        /* Start looping on Scene OR Group objects */
        while (base || go) { 
                if (sce) {
                        ob_iter= base->object;
                        oblay = base->lay;
                } else {
                        ob_iter= go->ob;
                        oblay = ob_iter->lay;
                }
                
                if (lay & oblay && scene->obedit!=ob_iter) {
                        ob=ob_iter->parent;
                        while(ob) {
                                if(ob==par) {
                                        ob = ob_iter;
        /* End Scene/Group object loop, below is generic */
                                        
                                        /* par_space_mat - only used for groups so we can modify the space dupli's are in
                                           when par_space_mat is NULL ob->obmat can be used instead of ob__obmat
                                        */
                                        if(par_space_mat)
                                                mul_m4_m4m4(ob__obmat, ob->obmat, par_space_mat);
                                        else
                                                copy_m4_m4(ob__obmat, ob->obmat);
                                        
                                        copy_m3_m4(imat, ob->parentinv);
                                                
                                        /* mballs have a different dupli handling */
                                        if(ob->type!=OB_MBALL) ob->flag |= OB_DONE;     /* doesnt render */

                                        for(a=0; a<totface; a++) {
                                                int mv1 = mface[a].v1;
                                                int mv2 = mface[a].v2;
                                                int mv3 = mface[a].v3;
                                                int mv4 = mface[a].v4;
                                                float *v1= mvert[mv1].co;
                                                float *v2= mvert[mv2].co;
                                                float *v3= mvert[mv3].co;
                                                float *v4= (mv4)? mvert[mv4].co: NULL;
                                                float cent[3], quat[4], mat[3][3], mat3[3][3], tmat[4][4], obmat[4][4];

                                                /* translation */
                                                if(v4)
                                                        cent_quad_v3(cent, v1, v2, v3, v4);
                                                else
                                                        cent_tri_v3(cent, v1, v2, v3);
                                                mul_m4_v3(pmat, cent);
                                                
                                                sub_v3_v3v3(cent, cent, pmat[3]);
                                                add_v3_v3(cent, ob__obmat[3]);
                                                
                                                copy_m4_m4(obmat, ob__obmat);
                                                
                                                VECCOPY(obmat[3], cent);
                                                
                                                /* rotation */
                                                tri_to_quat( quat,v1, v2, v3);
                                                quat_to_mat3( mat,quat);
                                                
                                                /* scale */
                                                if(par->transflag & OB_DUPLIFACES_SCALE) {
                                                        float size= v4? area_quad_v3(v1, v2, v3, v4): area_tri_v3(v1, v2, v3);
                                                        size= sqrtf(size) * par->dupfacesca;
                                                        mul_m3_fl(mat, size);
                                                }
                                                
                                                copy_m3_m3(mat3, mat);
                                                mul_m3_m3m3(mat, imat, mat3);
                                                
                                                copy_m4_m4(tmat, obmat);
                                                mul_m4_m4m3(obmat, tmat, mat);
                                                
                                                dob= new_dupli_object(lb, ob, obmat, par->lay, a, OB_DUPLIFACES, animated);
                                                if(G.rendering) {
                                                        w= (mv4)? 0.25f: 1.0f/3.0f;

                                                        if(orco) {
                                                                VECADDFAC(dob->orco, dob->orco, orco[mv1], w);
                                                                VECADDFAC(dob->orco, dob->orco, orco[mv2], w);
                                                                VECADDFAC(dob->orco, dob->orco, orco[mv3], w);
                                                                if(mv4)
                                                                        VECADDFAC(dob->orco, dob->orco, orco[mv4], w);
                                                        }

                                                        if(mtface) {
                                                                dob->uv[0] += w*mtface[a].uv[0][0];
                                                                dob->uv[1] += w*mtface[a].uv[0][1];
                                                                dob->uv[0] += w*mtface[a].uv[1][0];
                                                                dob->uv[1] += w*mtface[a].uv[1][1];
                                                                dob->uv[0] += w*mtface[a].uv[2][0];
                                                                dob->uv[1] += w*mtface[a].uv[2][1];

                                                                if(mv4) {
                                                                        dob->uv[0] += w*mtface[a].uv[3][0];
                                                                        dob->uv[1] += w*mtface[a].uv[3][1];
                                                                }
                                                        }
                                                }
                                                
                                                if(ob->transflag & OB_DUPLI) {
                                                        float tmpmat[4][4];
                                                        copy_m4_m4(tmpmat, ob->obmat);
                                                        copy_m4_m4(ob->obmat, obmat); /* pretend we are really this mat */
                                                        object_duplilist_recursive((ID *)id, scene, ob, lb, ob->obmat, level+1, animated);
                                                        copy_m4_m4(ob->obmat, tmpmat);
                                                }
                                        }
                                        
                                        break;
                                }
                                ob= ob->parent;
                        }
                }
                if (sce)        base= base->next;       /* scene loop */
                else            go= go->next;           /* group loop */
        }
        
        if(em) {
                MEM_freeN(mface);
                MEM_freeN(mvert);
        }

        if(orco)
                MEM_freeN(orco);
        
        dm->release(dm);
}

static void new_particle_duplilist(ListBase *lb, ID *id, Scene *scene, Object *par, float par_space_mat[][4], ParticleSystem *psys, int level, int animated)
{
        GroupObject *go;
        Object *ob=NULL, **oblist=NULL, obcopy, *obcopylist=NULL;
        DupliObject *dob;
        ParticleDupliWeight *dw;
        ParticleSettings *part;
        ParticleData *pa;
        ChildParticle *cpa=NULL;
        ParticleKey state;
        ParticleCacheKey *cache;
        float ctime, pa_time, scale = 1.0f;
        float tmat[4][4], mat[4][4], pamat[4][4], vec[3], size=0.0;
        float (*obmat)[4], (*oldobmat)[4];
        int a, b, counter, hair = 0;
        int totpart, totchild, totgroup=0 /*, pa_num */;

        int no_draw_flag = PARS_UNEXIST;

        if(psys==NULL) return;
        
        /* simple preventing of too deep nested groups */
        if(level>MAX_DUPLI_RECUR) return;
        
        part=psys->part;

        if(part==NULL)
                return;

        if(!psys_check_enabled(par, psys))
                return;

        if(G.rendering == 0)
                no_draw_flag |= PARS_NO_DISP;
        
        ctime = bsystem_time(scene, par, (float)scene->r.cfra, 0.0);

        totpart = psys->totpart;
        totchild = psys->totchild;

        BLI_srandom(31415926 + psys->seed);

        if((psys->renderdata || part->draw_as==PART_DRAW_REND) && ELEM(part->ren_as, PART_DRAW_OB, PART_DRAW_GR)) {
                ParticleSimulationData sim= {NULL};
                sim.scene= scene;
                sim.ob= par;
                sim.psys= psys;
                sim.psmd= psys_get_modifier(par, psys);

                /* first check for loops (particle system object used as dupli object) */
                if(part->ren_as == PART_DRAW_OB) {
                        if(ELEM(part->dup_ob, NULL, par))
                                return;
                }
                else { /*PART_DRAW_GR */
                        if(part->dup_group == NULL || part->dup_group->gobject.first == NULL)
                                return;

                        for(go=part->dup_group->gobject.first; go; go=go->next)
                                if(go->ob == par)
                                        return;
                }

                /* if we have a hair particle system, use the path cache */
                if(part->type == PART_HAIR) {
                        if(psys->flag & PSYS_HAIR_DONE)
                                hair= (totchild == 0 || psys->childcache) && psys->pathcache;
                        if(!hair)
                                return;
                        
                        /* we use cache, update totchild according to cached data */
                        totchild = psys->totchildcache;
                        totpart = psys->totcached;
                }

                psys_check_group_weights(part);

                psys->lattice = psys_get_lattice(&sim);

                /* gather list of objects or single object */
                if(part->ren_as==PART_DRAW_GR) {
                        group_handle_recalc_and_update(scene, par, part->dup_group);

                        if(part->draw & PART_DRAW_COUNT_GR) {
                                for(dw=part->dupliweights.first; dw; dw=dw->next)
                                        totgroup += dw->count;
                        }
                        else {
                                for(go=part->dup_group->gobject.first; go; go=go->next)
                                        totgroup++;
                        }

                        /* we also copy the actual objects to restore afterwards, since
                         * where_is_object_time will change the object which breaks transform */
                        oblist = MEM_callocN(totgroup*sizeof(Object *), "dupgroup object list");
                        obcopylist = MEM_callocN(totgroup*sizeof(Object), "dupgroup copy list");

                        
                        if(part->draw & PART_DRAW_COUNT_GR && totgroup) {
                                dw = part->dupliweights.first;

                                for(a=0; a<totgroup; dw=dw->next) {
                                        for(b=0; b<dw->count; b++, a++) {
                                                oblist[a] = dw->ob;
                                                obcopylist[a] = *dw->ob;
                                        }
                                }
                        }
                        else {
                                go = part->dup_group->gobject.first;
                                for(a=0; a<totgroup; a++, go=go->next) {
                                        oblist[a] = go->ob;
                                        obcopylist[a] = *go->ob;
                                }
                        }
                }
                else {
                        ob = part->dup_ob;
                        obcopy = *ob;
                }

                if(totchild==0 || part->draw & PART_DRAW_PARENT)
                        a = 0;
                else
                        a = totpart;

                for(pa=psys->particles,counter=0; a<totpart+totchild; a++,pa++,counter++) {
                        if(a<totpart) {
                                /* handle parent particle */
                                if(pa->flag & no_draw_flag)
                                        continue;

                                /* pa_num = pa->num; */ /* UNUSED */
                                pa_time = pa->time;
                                size = pa->size;
                        }
                        else {
                                /* handle child particle */
                                cpa = &psys->child[a - totpart];

                                /* pa_num = a; */ /* UNUSED */
                                pa_time = psys->particles[cpa->parent].time;
                                size = psys_get_child_size(psys, cpa, ctime, NULL);
                        }

                        /* some hair paths might be non-existent so they can't be used for duplication */
                        if(hair &&
                                ((a < totpart && psys->pathcache[a]->steps < 0) ||
                                (a >= totpart && psys->childcache[a-totpart]->steps < 0)))
                                continue;

                        if(part->ren_as==PART_DRAW_GR) {
                                /* for groups, pick the object based on settings */
                                if(part->draw&PART_DRAW_RAND_GR)
                                        b= BLI_rand() % totgroup;
                                else
                                        b= a % totgroup;

                                ob = oblist[b];
                                obmat = oblist[b]->obmat;
                                oldobmat = obcopylist[b].obmat;
                        }
                        else {
                                obmat= ob->obmat;
                                oldobmat= obcopy.obmat;
                        }

                        if(hair) {
                                /* hair we handle separate and compute transform based on hair keys */
                                if(a < totpart) {
                                        cache = psys->pathcache[a];
                                        psys_get_dupli_path_transform(&sim, pa, NULL, cache, pamat, &scale);
                                }
                                else {
                                        cache = psys->childcache[a-totpart];
                                        psys_get_dupli_path_transform(&sim, NULL, cpa, cache, pamat, &scale);
                                }

                                VECCOPY(pamat[3], cache->co);
                                pamat[3][3]= 1.0f;
                                
                        }
                        else {
                                /* first key */
                                state.time = ctime;
                                if(psys_get_particle_state(&sim, a, &state, 0) == 0) {
                                        continue;
                                }
                                else {
                                        float tquat[4];
                                        normalize_qt_qt(tquat, state.rot);
                                        quat_to_mat4(pamat, tquat);
                                        copy_v3_v3(pamat[3], state.co);
                                        pamat[3][3]= 1.0f;
                                }
                        }

                        if(part->ren_as==PART_DRAW_GR && psys->part->draw & PART_DRAW_WHOLE_GR) {
                                for(go= part->dup_group->gobject.first, b=0; go; go= go->next, b++) {

                                        /* group dupli offset, should apply after everything else */
                                        if(!is_zero_v3(part->dup_group->dupli_ofs)) {
                                                copy_m4_m4(tmat, oblist[b]->obmat);
                                                sub_v3_v3v3(tmat[3], tmat[3], part->dup_group->dupli_ofs);
                                                mul_m4_m4m4(tmat, tmat, pamat);
                                        }
                                        else {
                                                mul_m4_m4m4(tmat, oblist[b]->obmat, pamat);
                                        }

                                        mul_mat3_m4_fl(tmat, size*scale);
                                        if(par_space_mat)
                                                mul_m4_m4m4(mat, tmat, par_space_mat);
                                        else
                                                copy_m4_m4(mat, tmat);

                                        dob= new_dupli_object(lb, go->ob, mat, par->lay, counter, OB_DUPLIPARTS, animated);
                                        copy_m4_m4(dob->omat, obcopylist[b].obmat);
                                        if(G.rendering)
                                                psys_get_dupli_texture(psys, part, sim.psmd, pa, cpa, dob->uv, dob->orco);
                                }
                        }
                        else {
                                /* to give ipos in object correct offset */
                                where_is_object_time(scene, ob, ctime-pa_time);

                                VECCOPY(vec, obmat[3]);
                                obmat[3][0] = obmat[3][1] = obmat[3][2] = 0.0f;
                                
                                /* Normal particles and cached hair live in global space so we need to
                                 * remove the real emitter's transformation before 2nd order duplication.
                                 */
                                if(par_space_mat && GS(id->name) != ID_GR)
                                        mul_m4_m4m4(mat, pamat, psys->imat);
                                else
                                        copy_m4_m4(mat, pamat);

                                mul_m4_m4m4(tmat, obmat, mat);
                                mul_mat3_m4_fl(tmat, size*scale);

                                if(par_space_mat)
                                        mul_m4_m4m4(mat, tmat, par_space_mat);
                                else
                                        copy_m4_m4(mat, tmat);

                                if(part->draw & PART_DRAW_GLOBAL_OB)
                                        VECADD(mat[3], mat[3], vec);

                                dob= new_dupli_object(lb, ob, mat, ob->lay, counter, GS(id->name) == ID_GR ? OB_DUPLIGROUP : OB_DUPLIPARTS, animated);
                                copy_m4_m4(dob->omat, oldobmat);
                                if(G.rendering)
                                        psys_get_dupli_texture(psys, part, sim.psmd, pa, cpa, dob->uv, dob->orco);
                        }
                }

                /* restore objects since they were changed in where_is_object_time */
                if(part->ren_as==PART_DRAW_GR) {
                        for(a=0; a<totgroup; a++)
                                *(oblist[a])= obcopylist[a];
                }
                else
                        *ob= obcopy;
        }

        /* clean up */
        if(oblist)
                MEM_freeN(oblist);
        if(obcopylist)
                MEM_freeN(obcopylist);

        if(psys->lattice) {
                end_latt_deform(psys->lattice);
                psys->lattice = NULL;
        }
}

static Object *find_family_object(Object **obar, char *family, char ch)
{
        Object *ob;
        int flen;
        
        if( obar[(int)ch] ) return obar[(int)ch];
        
        flen= strlen(family);
        
        ob= G.main->object.first;
        while(ob) {
                if( ob->id.name[flen+2]==ch ) {
                        if( strncmp(ob->id.name+2, family, flen)==0 ) break;
                }
                ob= ob->id.next;
        }
        
        obar[(int)ch]= ob;
        
        return ob;
}


static void font_duplilist(ListBase *lb, Scene *scene, Object *par, int level, int animated)
{
        Object *ob, *obar[256]= {NULL};
        Curve *cu;
        struct chartrans *ct, *chartransdata;
        float vec[3], obmat[4][4], pmat[4][4], fsize, xof, yof;
        int slen, a;
        
        /* simple preventing of too deep nested groups */
        if(level>MAX_DUPLI_RECUR) return;
        
        copy_m4_m4(pmat, par->obmat);
        
        /* in par the family name is stored, use this to find the other objects */
        
        chartransdata= BKE_text_to_curve(scene, par, FO_DUPLI);
        if(chartransdata==NULL) return;

        cu= par->data;
        slen= strlen(cu->str);
        fsize= cu->fsize;
        xof= cu->xof;
        yof= cu->yof;
        
        ct= chartransdata;
        
        for(a=0; a<slen; a++, ct++) {
                
                ob= find_family_object(obar, cu->family, cu->str[a]);
                if(ob) {
                        vec[0]= fsize*(ct->xof - xof);
                        vec[1]= fsize*(ct->yof - yof);
                        vec[2]= 0.0;
                        
                        mul_m4_v3(pmat, vec);
                        
                        copy_m4_m4(obmat, par->obmat);
                        VECCOPY(obmat[3], vec);
                        
                        new_dupli_object(lb, ob, obmat, par->lay, a, OB_DUPLIVERTS, animated);
                }
        }
        
        MEM_freeN(chartransdata);
}

/* ------------- */

static void object_duplilist_recursive(ID *id, Scene *scene, Object *ob, ListBase *duplilist, float par_space_mat[][4], int level, int animated)
{       
        if((ob->transflag & OB_DUPLI)==0)
                return;
        
        /* Should the dupli's be generated for this object? - Respect restrict flags */
        if (G.rendering) {
                if (ob->restrictflag & OB_RESTRICT_RENDER) {
                        return;
                }
        } else {
                if (ob->restrictflag & OB_RESTRICT_VIEW) {
                        return;
                }
        }

        if(ob->transflag & OB_DUPLIPARTS) {
                ParticleSystem *psys = ob->particlesystem.first;
                for(; psys; psys=psys->next)
                        new_particle_duplilist(duplilist, id, scene, ob, par_space_mat, psys, level+1, animated);
        }
        else if(ob->transflag & OB_DUPLIVERTS) {
                if(ob->type==OB_MESH) {
                        vertex_duplilist(duplilist, id, scene, ob, par_space_mat, level+1, animated);
                }
                else if(ob->type==OB_FONT) {
                        if (GS(id->name)==ID_SCE) { /* TODO - support dupligroups */
                                font_duplilist(duplilist, scene, ob, level+1, animated);
                        }
                }
        }
        else if(ob->transflag & OB_DUPLIFACES) {
                if(ob->type==OB_MESH)
                        face_duplilist(duplilist, id, scene, ob, par_space_mat, level+1, animated);
        }
        else if(ob->transflag & OB_DUPLIFRAMES) {
                if (GS(id->name)==ID_SCE) { /* TODO - support dupligroups */
                        frames_duplilist(duplilist, scene, ob, level+1, animated);
                }
        } else if(ob->transflag & OB_DUPLIGROUP) {
                DupliObject *dob;
                
                group_duplilist(duplilist, scene, ob, level+1, animated); /* now recursive */

                if (level==0) {
                        for(dob= duplilist->first; dob; dob= dob->next)
                                if(dob->type == OB_DUPLIGROUP)
                                        copy_m4_m4(dob->ob->obmat, dob->mat);
                }
        }
}

/* Returns a list of DupliObject
 * note; group dupli's already set transform matrix. see note in group_duplilist() */
ListBase *object_duplilist(Scene *sce, Object *ob)
{
        ListBase *duplilist= MEM_mallocN(sizeof(ListBase), "duplilist");
        duplilist->first= duplilist->last= NULL;
        object_duplilist_recursive((ID *)sce, sce, ob, duplilist, NULL, 0, 0);
        return duplilist;
}

void free_object_duplilist(ListBase *lb)
{
        DupliObject *dob;
        
        /* loop in reverse order, if object is instanced multiple times
           the original layer may not really be original otherwise, proper
           solution is more complicated */
        for(dob= lb->last; dob; dob= dob->prev) {
                dob->ob->lay= dob->origlay;
                copy_m4_m4(dob->ob->obmat, dob->omat);
        }
        
        BLI_freelistN(lb);
        MEM_freeN(lb);
}

int count_duplilist(Object *ob)
{
        if(ob->transflag & OB_DUPLI) {
                if(ob->transflag & OB_DUPLIVERTS) {
                        if(ob->type==OB_MESH) {
                                if(ob->transflag & OB_DUPLIVERTS) {
                                        ParticleSystem *psys = ob->particlesystem.first;
                                        int pdup=0;

                                        for(; psys; psys=psys->next)
                                                pdup += psys->totpart;

                                        if(pdup==0){
                                                Mesh *me= ob->data;
                                                return me->totvert;
                                        }
                                        else
                                                return pdup;
                                }
                        }
                }
                else if(ob->transflag & OB_DUPLIFRAMES) {
                        int tot= ob->dupend - ob->dupsta; 
                        tot/= (ob->dupon+ob->dupoff);
                        return tot*ob->dupon;
                }
        }
        return 1;
}