anim.c

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/*
 * ***** 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"
#include "BKE_report.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(ReportList *reports, 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) {
        BKE_reportf(reports, RPT_ERROR,
                    "Motion Path frame extents invalid for %s (%d to %d).%s\n",
                    (pchan)? pchan->name : ob->id.name,
                    avs->path_sf, avs->path_ef,
                    (avs->path_sf == avs->path_ef)? " Cannot have single-frame paths." : "");
        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
 */
// TODO: it would be nice in future to be able to update objects dependant on these bones too?
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) {
                copy_v3_v3(mpv->co, mpt->pchan->pose_head);
            }
            else {
                copy_v3_v3(mpv->co, mpt->pchan->pose_tail);
            }
            
            /* result must be in worldspace */
            mul_m4_v3(mpt->ob->obmat, mpv->co);
        }
        else {
            /* worldspace object location */
            copy_v3_v3(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                    copy_qt_qt(q1, p1->quat);

        totfac= data[1]+data[2];
        if(totfac>FLT_EPSILON)  interp_qt_qtqt(q2, p1->quat, p2->quat, data[2] / totfac);
        else                    copy_qt_qt(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                    copy_qt_qt(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);
                mult_m4_m4m4(mat, ob->obmat, tmat);
            }
            else {
                mult_m4_m4m4(mat, ob->obmat, go->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;
    int cfrao = scene->r.cfra;
    int dupend = ob->dupend;
    
    /* 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<=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(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 */
            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(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 */
    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);
    copy_v3_v3(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)
        copy_v3_v3(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)
                        mult_m4_m4m4(vdd.obmat, par_space_mat, ob->obmat);
                    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) {
        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);
    }

    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)
                        mult_m4_m4m4(ob__obmat, par_space_mat, ob->obmat);
                    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);
                        
                        copy_v3_v3(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) {
                                madd_v3_v3v3fl(dob->orco, dob->orco, orco[mv1], w);
                                madd_v3_v3v3fl(dob->orco, dob->orco, orco[mv2], w);
                                madd_v3_v3v3fl(dob->orco, dob->orco, orco[mv3], w);
                                if (mv4) {
                                    madd_v3_v3v3fl(dob->orco, dob->orco, orco[mv4], w);
                                }
                            }

                            if(mtface) {
                                madd_v2_v2v2fl(dob->uv, dob->uv, mtface[a].uv[0], w);
                                madd_v2_v2v2fl(dob->uv, dob->uv, mtface[a].uv[1], w);
                                madd_v2_v2v2fl(dob->uv, dob->uv, mtface[a].uv[2], w);
                                if (mv4) {
                                    madd_v2_v2v2fl(dob->uv, dob->uv, mtface[a].uv[3], w);
                                }
                            }
                        }
                        
                        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(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 = BKE_curframe(scene); /* NOTE: in old animsys, used parent object's timeoffset... */

    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);
        /* make sure emitter imat is in global coordinates instead of render view coordinates */
        invert_m4_m4(par->imat, par->obmat);

        /* 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) {
                /* prevent divide by zero below [#28336] */
                if(totgroup == 0)
                    continue;

                /* 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);
                }

                copy_v3_v3(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);
                        mult_m4_m4m4(tmat, pamat, tmat);
                    }
                    else {
                        mult_m4_m4m4(tmat, pamat, oblist[b]->obmat);
                    }

                    mul_mat3_m4_fl(tmat, size*scale);
                    if(par_space_mat)
                        mult_m4_m4m4(mat, par_space_mat, tmat);
                    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);

                copy_v3_v3(vec, obmat[3]);
                obmat[3][0] = obmat[3][1] = obmat[3][2] = 0.0f;

                /* particle rotation uses x-axis as the aligned axis, so pre-rotate the object accordingly */
                if((part->draw & PART_DRAW_ROTATE_OB) == 0) {
                    float xvec[3], q[4];
                    xvec[0] = -1.f;
                    xvec[1] = xvec[2] = 0;
                    vec_to_quat(q, xvec, ob->trackflag, ob->upflag);
                    quat_to_mat4(obmat, q);
                    obmat[3][3]= 1.0f;
                }
                
                /* 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)
                    mult_m4_m4m4(mat, psys->imat, pamat);
                else
                    copy_m4_m4(mat, pamat);

                mult_m4_m4m4(tmat, mat, obmat);
                mul_mat3_m4_fl(tmat, size*scale);

                if(par_space_mat)
                    mult_m4_m4m4(mat, par_space_mat, tmat);
                else
                    copy_m4_m4(mat, tmat);

                if(part->draw & PART_DRAW_GLOBAL_OB)
                    add_v3_v3v3(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(G.main, 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);
            copy_v3_v3(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;
}