object.c

Go to the documentation of this file.

/* object.c
 *
 * 
 * $Id: object.c 37503 2011-06-15 09:45:26Z 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 <string.h>
#include <math.h>
#include <stdio.h>                      

#include "MEM_guardedalloc.h"

#include "DNA_anim_types.h"
#include "DNA_armature_types.h"
#include "DNA_camera_types.h"
#include "DNA_constraint_types.h"
#include "DNA_group_types.h"
#include "DNA_key_types.h"
#include "DNA_lamp_types.h"
#include "DNA_lattice_types.h"
#include "DNA_material_types.h"
#include "DNA_meta_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
#include "DNA_sequence_types.h"
#include "DNA_space_types.h"
#include "DNA_view3d_types.h"
#include "DNA_world_types.h"

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

#include "BKE_main.h"
#include "BKE_global.h"
#include "BKE_idprop.h"
#include "BKE_armature.h"
#include "BKE_action.h"
#include "BKE_bullet.h"
#include "BKE_colortools.h"
#include "BKE_deform.h"
#include "BKE_DerivedMesh.h"
#include "BKE_animsys.h"
#include "BKE_anim.h"
#include "BKE_constraint.h"
#include "BKE_curve.h"
#include "BKE_displist.h"
#include "BKE_effect.h"
#include "BKE_fcurve.h"
#include "BKE_group.h"
#include "BKE_icons.h"
#include "BKE_key.h"
#include "BKE_lattice.h"
#include "BKE_library.h"
#include "BKE_mesh.h"
#include "BKE_mball.h"
#include "BKE_modifier.h"
#include "BKE_object.h"
#include "BKE_paint.h"
#include "BKE_particle.h"
#include "BKE_pointcache.h"
#include "BKE_property.h"
#include "BKE_sca.h"
#include "BKE_scene.h"
#include "BKE_sequencer.h"
#include "BKE_softbody.h"
#include "BKE_material.h"

#include "LBM_fluidsim.h"

#ifdef WITH_PYTHON
#include "BPY_extern.h"
#endif

#include "GPU_material.h"

/* Local function protos */
static void solve_parenting (Scene *scene, Object *ob, Object *par, float obmat[][4], float slowmat[][4], int simul);

float originmat[3][3];  /* after where_is_object(), can be used in other functions (bad!) */

void clear_workob(Object *workob)
{
        memset(workob, 0, sizeof(Object));
        
        workob->size[0]= workob->size[1]= workob->size[2]= 1.0f;
        workob->rotmode= ROT_MODE_EUL;
}

void copy_baseflags(struct Scene *scene)
{
        Base *base= scene->base.first;
        
        while(base) {
                base->object->flag= base->flag;
                base= base->next;
        }
}

void copy_objectflags(struct Scene *scene)
{
        Base *base= scene->base.first;
        
        while(base) {
                base->flag= base->object->flag;
                base= base->next;
        }
}

void update_base_layer(struct Scene *scene, Object *ob)
{
        Base *base= scene->base.first;

        while (base) {
                if (base->object == ob) base->lay= ob->lay;
                base= base->next;
        }
}

void object_free_particlesystems(Object *ob)
{
        while(ob->particlesystem.first){
                ParticleSystem *psys = ob->particlesystem.first;
                
                BLI_remlink(&ob->particlesystem,psys);
                
                psys_free(ob,psys);
        }
}

void object_free_softbody(Object *ob)
{
        if(ob->soft) {
                sbFree(ob->soft);
                ob->soft= NULL;
        }
}

void object_free_bulletsoftbody(Object *ob)
{
        if(ob->bsoft) {
                bsbFree(ob->bsoft);
                ob->bsoft= NULL;
        }
}

void object_free_modifiers(Object *ob)
{
        while (ob->modifiers.first) {
                ModifierData *md = ob->modifiers.first;
                
                BLI_remlink(&ob->modifiers, md);
                
                modifier_free(md);
        }

        /* particle modifiers were freed, so free the particlesystems as well */
        object_free_particlesystems(ob);

        /* same for softbody */
        object_free_softbody(ob);
}

void object_link_modifiers(struct Object *ob, struct Object *from)
{
        ModifierData *md;
        object_free_modifiers(ob);

        for (md=from->modifiers.first; md; md=md->next) {
                ModifierData *nmd = NULL;

                if(ELEM4(md->type, eModifierType_Hook, eModifierType_Softbody, eModifierType_ParticleInstance, eModifierType_Collision)) continue;

                nmd = modifier_new(md->type);
                modifier_copyData(md, nmd);
                BLI_addtail(&ob->modifiers, nmd);
        }

        copy_object_particlesystems(ob, from);
        copy_object_softbody(ob, from);

        // TODO: smoke?, cloth?
}

/* here we will collect all local displist stuff */
/* also (ab)used in depsgraph */
void object_free_display(Object *ob)
{
        if(ob->derivedDeform) {
                ob->derivedDeform->needsFree = 1;
                ob->derivedDeform->release(ob->derivedDeform);
                ob->derivedDeform= NULL;
        }
        if(ob->derivedFinal) {
                ob->derivedFinal->needsFree = 1;
                ob->derivedFinal->release(ob->derivedFinal);
                ob->derivedFinal= NULL;
        }
        
        freedisplist(&ob->disp);
}

void free_sculptsession(Object *ob)
{
        if(ob && ob->sculpt) {
                SculptSession *ss = ob->sculpt;
                DerivedMesh *dm= ob->derivedFinal;

                if(ss->pbvh)
                        BLI_pbvh_free(ss->pbvh);
                if(dm && dm->getPBVH)
                        dm->getPBVH(NULL, dm); /* signal to clear */

                if(ss->texcache)
                        MEM_freeN(ss->texcache);

                if(ss->layer_co)
                        MEM_freeN(ss->layer_co);

                if(ss->orig_cos)
                        MEM_freeN(ss->orig_cos);
                if(ss->deform_cos)
                        MEM_freeN(ss->deform_cos);
                if(ss->deform_imats)
                        MEM_freeN(ss->deform_imats);

                MEM_freeN(ss);

                ob->sculpt = NULL;
        }
}

/* do not free object itself */
void free_object(Object *ob)
{
        int a;
        
        object_free_display(ob);
        
        /* disconnect specific data */
        if(ob->data) {
                ID *id= ob->data;
                id->us--;
                if(id->us==0) {
                        if(ob->type==OB_MESH) unlink_mesh(ob->data);
                        else if(ob->type==OB_CURVE) unlink_curve(ob->data);
                        else if(ob->type==OB_MBALL) unlink_mball(ob->data);
                }
                ob->data= NULL;
        }
        
        for(a=0; a<ob->totcol; a++) {
                if(ob->mat[a]) ob->mat[a]->id.us--;
        }
        if(ob->mat) MEM_freeN(ob->mat);
        if(ob->matbits) MEM_freeN(ob->matbits);
        ob->mat= NULL;
        ob->matbits= NULL;
        if(ob->bb) MEM_freeN(ob->bb); 
        ob->bb= NULL;
        if(ob->path) free_path(ob->path); 
        ob->path= NULL;
        if(ob->adt) BKE_free_animdata((ID *)ob);
        if(ob->poselib) ob->poselib->id.us--;
        if(ob->gpd) ((ID *)ob->gpd)->us--;
        if(ob->defbase.first)
                BLI_freelistN(&ob->defbase);
        if(ob->pose)
                free_pose(ob->pose);
        if(ob->mpath)
                animviz_free_motionpath(ob->mpath);
        free_properties(&ob->prop);
        object_free_modifiers(ob);
        
        free_sensors(&ob->sensors);
        free_controllers(&ob->controllers);
        free_actuators(&ob->actuators);
        
        free_constraints(&ob->constraints);
        
        free_partdeflect(ob->pd);

        if(ob->soft) sbFree(ob->soft);
        if(ob->bsoft) bsbFree(ob->bsoft);
        if(ob->gpulamp.first) GPU_lamp_free(ob);

        free_sculptsession(ob);

        if(ob->pc_ids.first) BLI_freelistN(&ob->pc_ids);
}

static void unlink_object__unlinkModifierLinks(void *userData, Object *ob, Object **obpoin)
{
        Object *unlinkOb = userData;

        if (*obpoin==unlinkOb) {
                *obpoin = NULL;
                ob->recalc |= OB_RECALC_OB|OB_RECALC_DATA|OB_RECALC_TIME; // XXX: should this just be OB_RECALC_DATA?
        }
}

void unlink_object(Object *ob)
{
        Main *bmain= G.main;
        Object *obt;
        Material *mat;
        World *wrld;
        bScreen *sc;
        Scene *sce;
        Curve *cu;
        Tex *tex;
        Group *group;
        Camera *camera;
        bConstraint *con;
        //bActionStrip *strip; // XXX animsys 
        ModifierData *md;
        ARegion *ar;
        RegionView3D *rv3d;
        int a, found;
        
        unlink_controllers(&ob->controllers);
        unlink_actuators(&ob->actuators);
        
        /* check all objects: parents en bevels and fields, also from libraries */
        // FIXME: need to check all animation blocks (drivers)
        obt= bmain->object.first;
        while(obt) {
                if(obt->proxy==ob)
                        obt->proxy= NULL;
                if(obt->proxy_from==ob) {
                        obt->proxy_from= NULL;
                        obt->recalc |= OB_RECALC_OB;
                }
                if(obt->proxy_group==ob)
                        obt->proxy_group= NULL;
                
                if(obt->parent==ob) {
                        obt->parent= NULL;
                        obt->recalc |= OB_RECALC_OB|OB_RECALC_DATA|OB_RECALC_TIME;
                }
                
                modifiers_foreachObjectLink(obt, unlink_object__unlinkModifierLinks, ob);
                
                if ELEM(obt->type, OB_CURVE, OB_FONT) {
                        cu= obt->data;

                        if(cu->bevobj==ob) {
                                cu->bevobj= NULL;
                                obt->recalc |= OB_RECALC_OB|OB_RECALC_DATA|OB_RECALC_TIME;
                        }
                        if(cu->taperobj==ob) {
                                cu->taperobj= NULL;
                                obt->recalc |= OB_RECALC_OB|OB_RECALC_DATA|OB_RECALC_TIME;
                        }
                        if(cu->textoncurve==ob) {
                                cu->textoncurve= NULL;
                                obt->recalc |= OB_RECALC_OB|OB_RECALC_DATA|OB_RECALC_TIME;
                        }
                }
                else if(obt->type==OB_ARMATURE && obt->pose) {
                        bPoseChannel *pchan;
                        for(pchan= obt->pose->chanbase.first; pchan; pchan= pchan->next) {
                                for (con = pchan->constraints.first; con; con=con->next) {
                                        bConstraintTypeInfo *cti= constraint_get_typeinfo(con);
                                        ListBase targets = {NULL, NULL};
                                        bConstraintTarget *ct;
                                        
                                        if (cti && cti->get_constraint_targets) {
                                                cti->get_constraint_targets(con, &targets);
                                                
                                                for (ct= targets.first; ct; ct= ct->next) {
                                                        if (ct->tar == ob) {
                                                                ct->tar = NULL;
                                                                strcpy(ct->subtarget, "");
                                                                obt->recalc |= OB_RECALC_DATA;
                                                        }
                                                }
                                                
                                                if (cti->flush_constraint_targets)
                                                        cti->flush_constraint_targets(con, &targets, 0);
                                        }
                                }
                                if(pchan->custom==ob)
                                        pchan->custom= NULL;
                        }
                } else if(ELEM(OB_MBALL, ob->type, obt->type)) {
                        if(is_mball_basis_for(obt, ob))
                                obt->recalc|= OB_RECALC_DATA;
                }
                
                sca_remove_ob_poin(obt, ob);
                
                for (con = obt->constraints.first; con; con=con->next) {
                        bConstraintTypeInfo *cti= constraint_get_typeinfo(con);
                        ListBase targets = {NULL, NULL};
                        bConstraintTarget *ct;
                        
                        if (cti && cti->get_constraint_targets) {
                                cti->get_constraint_targets(con, &targets);
                                
                                for (ct= targets.first; ct; ct= ct->next) {
                                        if (ct->tar == ob) {
                                                ct->tar = NULL;
                                                strcpy(ct->subtarget, "");
                                                obt->recalc |= OB_RECALC_DATA;
                                        }
                                }
                                
                                if (cti->flush_constraint_targets)
                                        cti->flush_constraint_targets(con, &targets, 0);
                        }
                }
                
                /* object is deflector or field */
                if(ob->pd) {
                        if(obt->soft)
                                obt->recalc |= OB_RECALC_DATA;

                        /* cloth */
                        for(md=obt->modifiers.first; md; md=md->next)
                                if(md->type == eModifierType_Cloth)
                                        obt->recalc |= OB_RECALC_DATA;
                }
                
                /* strips */
#if 0 // XXX old animation system
                for(strip= obt->nlastrips.first; strip; strip= strip->next) {
                        if(strip->object==ob)
                                strip->object= NULL;
                        
                        if(strip->modifiers.first) {
                                bActionModifier *amod;
                                for(amod= strip->modifiers.first; amod; amod= amod->next)
                                        if(amod->ob==ob)
                                                amod->ob= NULL;
                        }
                }
#endif // XXX old animation system

                /* particle systems */
                if(obt->particlesystem.first) {
                        ParticleSystem *tpsys= obt->particlesystem.first;
                        for(; tpsys; tpsys=tpsys->next) {
                                BoidState *state = NULL;
                                BoidRule *rule = NULL;

                                ParticleTarget *pt = tpsys->targets.first;
                                for(; pt; pt=pt->next) {
                                        if(pt->ob==ob) {
                                                pt->ob = NULL;
                                                obt->recalc |= OB_RECALC_DATA;
                                                break;
                                        }
                                }

                                if(tpsys->target_ob==ob) {
                                        tpsys->target_ob= NULL;
                                        obt->recalc |= OB_RECALC_DATA;
                                }

                                if(tpsys->part->dup_ob==ob)
                                        tpsys->part->dup_ob= NULL;

                                if(tpsys->part->phystype==PART_PHYS_BOIDS) {
                                        ParticleData *pa;
                                        BoidParticle *bpa;
                                        int p;

                                        for(p=0,pa=tpsys->particles; p<tpsys->totpart; p++,pa++) {
                                                bpa = pa->boid;
                                                if(bpa->ground == ob)
                                                        bpa->ground = NULL;
                                        }
                                }
                                if(tpsys->part->boids) {
                                        for(state = tpsys->part->boids->states.first; state; state=state->next) {
                                                for(rule = state->rules.first; rule; rule=rule->next) {
                                                        if(rule->type==eBoidRuleType_Avoid) {
                                                                BoidRuleGoalAvoid *gabr = (BoidRuleGoalAvoid*)rule;
                                                                if(gabr->ob==ob)
                                                                        gabr->ob= NULL;
                                                        }
                                                        else if(rule->type==eBoidRuleType_FollowLeader) {
                                                                BoidRuleFollowLeader *flbr = (BoidRuleFollowLeader*)rule;
                                                                if(flbr->ob==ob)
                                                                        flbr->ob= NULL;
                                                        }
                                                }
                                        }
                                }
                        }
                        if(ob->pd)
                                obt->recalc |= OB_RECALC_DATA;
                }

                obt= obt->id.next;
        }
        
        /* materials */
        mat= bmain->mat.first;
        while(mat) {
        
                for(a=0; a<MAX_MTEX; a++) {
                        if(mat->mtex[a] && ob==mat->mtex[a]->object) {
                                /* actually, test for lib here... to do */
                                mat->mtex[a]->object= NULL;
                        }
                }

                mat= mat->id.next;
        }
        
        /* textures */
        for(tex= bmain->tex.first; tex; tex= tex->id.next) {
                if(tex->env && (ob==tex->env->object)) tex->env->object= NULL;
                if(tex->pd  && (ob==tex->pd->object))  tex->pd->object= NULL;
                if(tex->vd  && (ob==tex->vd->object))  tex->vd->object= NULL;
        }

        /* worlds */
        wrld= bmain->world.first;
        while(wrld) {
                if(wrld->id.lib==NULL) {
                        for(a=0; a<MAX_MTEX; a++) {
                                if(wrld->mtex[a] && ob==wrld->mtex[a]->object)
                                        wrld->mtex[a]->object= NULL;
                        }
                }
                
                wrld= wrld->id.next;
        }
                
        /* scenes */
        sce= bmain->scene.first;
        while(sce) {
                if(sce->id.lib==NULL) {
                        if(sce->camera==ob) sce->camera= NULL;
                        if(sce->toolsettings->skgen_template==ob) sce->toolsettings->skgen_template = NULL;
                        if(sce->toolsettings->particle.object==ob) sce->toolsettings->particle.object= NULL;

#ifdef DURIAN_CAMERA_SWITCH
                        {
                                TimeMarker *m;

                                for (m= sce->markers.first; m; m= m->next) {
                                        if(m->camera==ob)
                                                m->camera= NULL;
                                }
                        }
#endif
                        if(sce->ed) {
                                Sequence *seq;
                                SEQ_BEGIN(sce->ed, seq)
                                        if(seq->scene_camera==ob) {
                                                seq->scene_camera= NULL;
                                        }
                                SEQ_END
                        }
                }

                sce= sce->id.next;
        }
        
#if 0 // XXX old animation system
        /* ipos */
        ipo= bmain->ipo.first;
        while(ipo) {
                if(ipo->id.lib==NULL) {
                        IpoCurve *icu;
                        for(icu= ipo->curve.first; icu; icu= icu->next) {
                                if(icu->driver && icu->driver->ob==ob)
                                        icu->driver->ob= NULL;
                        }
                }
                ipo= ipo->id.next;
        }
#endif // XXX old animation system
        
        /* screens */
        sc= bmain->screen.first;
        while(sc) {
                ScrArea *sa= sc->areabase.first;
                while(sa) {
                        SpaceLink *sl;

                        for (sl= sa->spacedata.first; sl; sl= sl->next) {
                                if(sl->spacetype==SPACE_VIEW3D) {
                                        View3D *v3d= (View3D*) sl;

                                        found= 0;
                                        if(v3d->camera==ob) {
                                                v3d->camera= NULL;
                                                found= 1;
                                        }
                                        if(v3d->localvd && v3d->localvd->camera==ob ) {
                                                v3d->localvd->camera= NULL;
                                                found += 2;
                                        }

                                        if (found) {
                                                if (sa->spacetype == SPACE_VIEW3D) {
                                                        for (ar= sa->regionbase.first; ar; ar= ar->next) {
                                                                if (ar->regiontype==RGN_TYPE_WINDOW) {
                                                                        rv3d= (RegionView3D *)ar->regiondata;
                                                                        if (found == 1 || found == 3) {
                                                                                if (rv3d->persp == RV3D_CAMOB)
                                                                                        rv3d->persp= RV3D_PERSP;
                                                                        }
                                                                        if (found == 2 || found == 3) {
                                                                                if (rv3d->localvd && rv3d->localvd->persp == RV3D_CAMOB)
                                                                                        rv3d->localvd->persp= RV3D_PERSP;
                                                                        }
                                                                }
                                                        }
                                                }
                                        }
                                }
                                else if(sl->spacetype==SPACE_OUTLINER) {
                                        SpaceOops *so= (SpaceOops *)sl;

                                        if(so->treestore) {
                                                TreeStoreElem *tselem= so->treestore->data;
                                                int a;
                                                for(a=0; a<so->treestore->usedelem; a++, tselem++) {
                                                        if(tselem->id==(ID *)ob) tselem->id= NULL;
                                                }
                                        }
                                }
                                else if(sl->spacetype==SPACE_BUTS) {
                                        SpaceButs *sbuts= (SpaceButs *)sl;

                                        if(sbuts->pinid==(ID *)ob) {
                                                sbuts->flag&= ~SB_PIN_CONTEXT;
                                                sbuts->pinid= NULL;
                                        }
                                }
                        }

                        sa= sa->next;
                }
                sc= sc->id.next;
        }

        /* groups */
        group= bmain->group.first;
        while(group) {
                rem_from_group(group, ob, NULL, NULL);
                group= group->id.next;
        }
        
        /* cameras */
        camera= bmain->camera.first;
        while(camera) {
                if (camera->dof_ob==ob) {
                        camera->dof_ob = NULL;
                }
                camera= camera->id.next;
        }
}

int exist_object(Object *obtest)
{
        Object *ob;
        
        if(obtest==NULL) return 0;
        
        ob= G.main->object.first;
        while(ob) {
                if(ob==obtest) return 1;
                ob= ob->id.next;
        }
        return 0;
}

void *add_camera(const char *name)
{
        Camera *cam;
        
        cam=  alloc_libblock(&G.main->camera, ID_CA, name);

        cam->lens= 35.0f;
        cam->clipsta= 0.1f;
        cam->clipend= 100.0f;
        cam->drawsize= 0.5f;
        cam->ortho_scale= 6.0;
        cam->flag |= CAM_SHOWPASSEPARTOUT;
        cam->passepartalpha = 0.5f;
        
        return cam;
}

Camera *copy_camera(Camera *cam)
{
        Camera *camn;
        
        camn= copy_libblock(cam);
        
        return camn;
}



void make_local_camera(Camera *cam)
{
        Main *bmain= G.main;
        Object *ob;
        int local=0, lib=0;

        /* - only lib users: do nothing
         * - only local users: set flag
         * - mixed: make copy
         */
        
        if(cam->id.lib==NULL) return;
        if(cam->id.us==1) {
                cam->id.lib= NULL;
                cam->id.flag= LIB_LOCAL;
                new_id(&bmain->camera, (ID *)cam, NULL);
                return;
        }
        
        for(ob= bmain->object.first; ob && ELEM(0, lib, local); ob= ob->id.next) {
                if(ob->data==cam) {
                        if(ob->id.lib) lib= 1;
                        else local= 1;
                }
        }
        
        if(local && lib==0) {
                cam->id.lib= NULL;
                cam->id.flag= LIB_LOCAL;
                new_id(&bmain->camera, (ID *)cam, NULL);
        }
        else if(local && lib) {
                Camera *camn= copy_camera(cam);
                camn->id.us= 0;
                
                for(ob= bmain->object.first; ob; ob= ob->id.next) {
                        if(ob->data == cam) {
                                if(ob->id.lib==NULL) {
                                        ob->data= camn;
                                        camn->id.us++;
                                        cam->id.us--;
                                }
                        }
                }
        }
}

/* get the camera's dof value, takes the dof object into account */
float dof_camera(Object *ob)
{
        Camera *cam = (Camera *)ob->data; 
        if (ob->type != OB_CAMERA)
                return 0.0f;
        if (cam->dof_ob) {      
                /* too simple, better to return the distance on the view axis only
                 * return len_v3v3(ob->obmat[3], cam->dof_ob->obmat[3]); */
                float mat[4][4], imat[4][4], obmat[4][4];
                
                copy_m4_m4(obmat, ob->obmat);
                normalize_m4(obmat);
                invert_m4_m4(imat, obmat);
                mul_m4_m4m4(mat, cam->dof_ob->obmat, imat);
                return (float)fabs(mat[3][2]);
        }
        return cam->YF_dofdist;
}

void *add_lamp(const char *name)
{
        Lamp *la;
        
        la=  alloc_libblock(&G.main->lamp, ID_LA, name);
        
        la->r= la->g= la->b= la->k= 1.0f;
        la->haint= la->energy= 1.0f;
        la->dist= 25.0f;
        la->spotsize= 45.0f;
        la->spotblend= 0.15f;
        la->att2= 1.0f;
        la->mode= LA_SHAD_BUF;
        la->bufsize= 512;
        la->clipsta= 0.5f;
        la->clipend= 40.0f;
        la->shadspotsize= 45.0f;
        la->samp= 3;
        la->bias= 1.0f;
        la->soft= 3.0f;
        la->compressthresh= 0.05f;
        la->ray_samp= la->ray_sampy= la->ray_sampz= 1; 
        la->area_size=la->area_sizey=la->area_sizez= 1.0f; 
        la->buffers= 1;
        la->buftype= LA_SHADBUF_HALFWAY;
        la->ray_samp_method = LA_SAMP_HALTON;
        la->adapt_thresh = 0.001f;
        la->preview=NULL;
        la->falloff_type = LA_FALLOFF_INVSQUARE;
        la->curfalloff = curvemapping_add(1, 0.0f, 1.0f, 1.0f, 0.0f);
        la->sun_effect_type = 0;
        la->horizon_brightness = 1.0;
        la->spread = 1.0;
        la->sun_brightness = 1.0;
        la->sun_size = 1.0;
        la->backscattered_light = 1.0f;
        la->atm_turbidity = 2.0f;
        la->atm_inscattering_factor = 1.0f;
        la->atm_extinction_factor = 1.0f;
        la->atm_distance_factor = 1.0f;
        la->sun_intensity = 1.0f;
        la->skyblendtype= MA_RAMP_ADD;
        la->skyblendfac= 1.0f;
        la->sky_colorspace= BLI_XYZ_CIE;
        la->sky_exposure= 1.0f;
        
        curvemapping_initialize(la->curfalloff);
        return la;
}

Lamp *copy_lamp(Lamp *la)
{
        Lamp *lan;
        int a;
        
        lan= copy_libblock(la);

        for(a=0; a<MAX_MTEX; a++) {
                if(lan->mtex[a]) {
                        lan->mtex[a]= MEM_mallocN(sizeof(MTex), "copylamptex");
                        memcpy(lan->mtex[a], la->mtex[a], sizeof(MTex));
                        id_us_plus((ID *)lan->mtex[a]->tex);
                }
        }
        
        lan->curfalloff = curvemapping_copy(la->curfalloff);
        
        if(la->preview)
                lan->preview = BKE_previewimg_copy(la->preview);
        
        return lan;
}

Lamp *localize_lamp(Lamp *la)
{
        Lamp *lan;
        int a;
        
        lan= copy_libblock(la);
        BLI_remlink(&G.main->lamp, lan);

        for(a=0; a<MAX_MTEX; a++) {
                if(lan->mtex[a]) {
                        lan->mtex[a]= MEM_mallocN(sizeof(MTex), "localize_lamp");
                        memcpy(lan->mtex[a], la->mtex[a], sizeof(MTex));
                        /* free lamp decrements */
                        id_us_plus((ID *)lan->mtex[a]->tex);
                }
        }
        
        lan->curfalloff = curvemapping_copy(la->curfalloff);

        lan->preview= NULL;
        
        return lan;
}

void make_local_lamp(Lamp *la)
{
        Main *bmain= G.main;
        Object *ob;
        Lamp *lan;
        int local=0, lib=0;

        /* - only lib users: do nothing
                * - only local users: set flag
                * - mixed: make copy
                */
        
        if(la->id.lib==NULL) return;
        if(la->id.us==1) {
                la->id.lib= NULL;
                la->id.flag= LIB_LOCAL;
                new_id(&bmain->lamp, (ID *)la, NULL);
                return;
        }
        
        ob= bmain->object.first;
        while(ob) {
                if(ob->data==la) {
                        if(ob->id.lib) lib= 1;
                        else local= 1;
                }
                ob= ob->id.next;
        }
        
        if(local && lib==0) {
                la->id.lib= NULL;
                la->id.flag= LIB_LOCAL;
                new_id(&bmain->lamp, (ID *)la, NULL);
        }
        else if(local && lib) {
                lan= copy_lamp(la);
                lan->id.us= 0;
                
                ob= bmain->object.first;
                while(ob) {
                        if(ob->data==la) {
                                
                                if(ob->id.lib==NULL) {
                                        ob->data= lan;
                                        lan->id.us++;
                                        la->id.us--;
                                }
                        }
                        ob= ob->id.next;
                }
        }
}

void free_camera(Camera *ca)
{
        BKE_free_animdata((ID *)ca);
}

void free_lamp(Lamp *la)
{
        MTex *mtex;
        int a;

        for(a=0; a<MAX_MTEX; a++) {
                mtex= la->mtex[a];
                if(mtex && mtex->tex) mtex->tex->id.us--;
                if(mtex) MEM_freeN(mtex);
        }
        
        BKE_free_animdata((ID *)la);

        curvemapping_free(la->curfalloff);
        
        BKE_previewimg_free(&la->preview);
        BKE_icon_delete(&la->id);
        la->id.icon_id = 0;
}

/* *************************************************** */

static void *add_obdata_from_type(int type)
{
        switch (type) {
        case OB_MESH: return add_mesh("Mesh");
        case OB_CURVE: return add_curve("Curve", OB_CURVE);
        case OB_SURF: return add_curve("Surf", OB_SURF);
        case OB_FONT: return add_curve("Text", OB_FONT);
        case OB_MBALL: return add_mball("Meta");
        case OB_CAMERA: return add_camera("Camera");
        case OB_LAMP: return add_lamp("Lamp");
        case OB_LATTICE: return add_lattice("Lattice");
        case OB_ARMATURE: return add_armature("Armature");
        case OB_EMPTY: return NULL;
        default:
                printf("add_obdata_from_type: Internal error, bad type: %d\n", type);
                return NULL;
        }
}

static const char *get_obdata_defname(int type)
{
        switch (type) {
        case OB_MESH: return "Mesh";
        case OB_CURVE: return "Curve";
        case OB_SURF: return "Surf";
        case OB_FONT: return "Text";
        case OB_MBALL: return "Mball";
        case OB_CAMERA: return "Camera";
        case OB_LAMP: return "Lamp";
        case OB_LATTICE: return "Lattice";
        case OB_ARMATURE: return "Armature";
        case OB_EMPTY: return "Empty";
        default:
                printf("get_obdata_defname: Internal error, bad type: %d\n", type);
                return "Empty";
        }
}

/* more general add: creates minimum required data, but without vertices etc. */
Object *add_only_object(int type, const char *name)
{
        Object *ob;

        ob= alloc_libblock(&G.main->object, ID_OB, name);

        /* default object vars */
        ob->type= type;
        
        ob->col[0]= ob->col[1]= ob->col[2]= 1.0;
        ob->col[3]= 1.0;
        
        ob->size[0]= ob->size[1]= ob->size[2]= 1.0;
        
        /* objects should default to having Euler XYZ rotations, 
         * but rotations default to quaternions 
         */
        ob->rotmode= ROT_MODE_EUL;

        unit_axis_angle(ob->rotAxis, &ob->rotAngle);
        unit_axis_angle(ob->drotAxis, &ob->drotAngle);

        unit_qt(ob->quat);
        unit_qt(ob->dquat);

        /* rotation locks should be 4D for 4 component rotations by default... */
        ob->protectflag = OB_LOCK_ROT4D;
        
        unit_m4(ob->constinv);
        unit_m4(ob->parentinv);
        unit_m4(ob->obmat);
        ob->dt= OB_TEXTURE;
        ob->empty_drawtype= OB_PLAINAXES;
        ob->empty_drawsize= 1.0;

        if(type==OB_CAMERA || type==OB_LAMP) {
                ob->trackflag= OB_NEGZ;
                ob->upflag= OB_POSY;
        }
        else {
                ob->trackflag= OB_POSY;
                ob->upflag= OB_POSZ;
        }
        
        ob->dupon= 1; ob->dupoff= 0;
        ob->dupsta= 1; ob->dupend= 100;
        ob->dupfacesca = 1.0;

        /* Game engine defaults*/
        ob->mass= ob->inertia= 1.0f;
        ob->formfactor= 0.4f;
        ob->damping= 0.04f;
        ob->rdamping= 0.1f;
        ob->anisotropicFriction[0] = 1.0f;
        ob->anisotropicFriction[1] = 1.0f;
        ob->anisotropicFriction[2] = 1.0f;
        ob->gameflag= OB_PROP|OB_COLLISION;
        ob->margin = 0.0;
        ob->init_state=1;
        ob->state=1;
        /* ob->pad3 == Contact Processing Threshold */
        ob->m_contactProcessingThreshold = 1.;
        
        /* NT fluid sim defaults */
        ob->fluidsimFlag = 0;
        ob->fluidsimSettings = NULL;

        ob->pc_ids.first = ob->pc_ids.last = NULL;
        
        /* Animation Visualisation defaults */
        animviz_settings_init(&ob->avs);

        return ob;
}

/* general add: to scene, with layer from area and default name */
/* creates minimum required data, but without vertices etc. */
Object *add_object(struct Scene *scene, int type)
{
        Object *ob;
        Base *base;
        char name[32];

        BLI_strncpy(name, get_obdata_defname(type), sizeof(name));
        ob = add_only_object(type, name);

        ob->data= add_obdata_from_type(type);

        ob->lay= scene->lay;
        
        base= scene_add_base(scene, ob);
        scene_select_base(scene, base);
        ob->recalc |= OB_RECALC_OB|OB_RECALC_DATA|OB_RECALC_TIME;

        return ob;
}

SoftBody *copy_softbody(SoftBody *sb)
{
        SoftBody *sbn;
        
        if (sb==NULL) return(NULL);
        
        sbn= MEM_dupallocN(sb);
        sbn->totspring= sbn->totpoint= 0;
        sbn->bpoint= NULL;
        sbn->bspring= NULL;
        
        sbn->keys= NULL;
        sbn->totkey= sbn->totpointkey= 0;
        
        sbn->scratch= NULL;

        sbn->pointcache= BKE_ptcache_copy_list(&sbn->ptcaches, &sb->ptcaches);

        if(sb->effector_weights)
                sbn->effector_weights = MEM_dupallocN(sb->effector_weights);

        return sbn;
}

BulletSoftBody *copy_bulletsoftbody(BulletSoftBody *bsb)
{
        BulletSoftBody *bsbn;

        if (bsb == NULL)
                return NULL;
        bsbn = MEM_dupallocN(bsb);
        /* no pointer in this structure yet */
        return bsbn;
}

static ParticleSystem *copy_particlesystem(ParticleSystem *psys)
{
        ParticleSystem *psysn;
        ParticleData *pa;
        int p;

        psysn= MEM_dupallocN(psys);
        psysn->particles= MEM_dupallocN(psys->particles);
        psysn->child= MEM_dupallocN(psys->child);

        if(psys->part->type == PART_HAIR) {
                for(p=0, pa=psysn->particles; p<psysn->totpart; p++, pa++)
                        pa->hair = MEM_dupallocN(pa->hair);
        }

        if(psysn->particles && (psysn->particles->keys || psysn->particles->boid)) {
                ParticleKey *key = psysn->particles->keys;
                BoidParticle *boid = psysn->particles->boid;

                if(key)
                        key = MEM_dupallocN(key);
                
                if(boid)
                        boid = MEM_dupallocN(boid);
                
                for(p=0, pa=psysn->particles; p<psysn->totpart; p++, pa++) {
                        if(boid)
                                pa->boid = boid++;
                        if(key) {
                                pa->keys = key;
                                key += pa->totkey;
                        }
                }
        }

        if(psys->clmd) {
                psysn->clmd = (ClothModifierData *)modifier_new(eModifierType_Cloth);
                modifier_copyData((ModifierData*)psys->clmd, (ModifierData*)psysn->clmd);
                psys->hair_in_dm = psys->hair_out_dm = NULL;
        }

        BLI_duplicatelist(&psysn->targets, &psys->targets);

        psysn->pathcache= NULL;
        psysn->childcache= NULL;
        psysn->edit= NULL;
        psysn->frand= NULL;
        psysn->pdd= NULL;
        psysn->effectors= NULL;
        
        psysn->pathcachebufs.first = psysn->pathcachebufs.last = NULL;
        psysn->childcachebufs.first = psysn->childcachebufs.last = NULL;
        psysn->renderdata = NULL;
        
        psysn->pointcache= BKE_ptcache_copy_list(&psysn->ptcaches, &psys->ptcaches);

        /* XXX - from reading existing code this seems correct but intended usage of
         * pointcache should /w cloth should be added in 'ParticleSystem' - campbell */
        if(psysn->clmd) {
                psysn->clmd->point_cache= psysn->pointcache;
        }

        id_us_plus((ID *)psysn->part);

        return psysn;
}

void copy_object_particlesystems(Object *obn, Object *ob)
{
        ParticleSystemModifierData *psmd;
        ParticleSystem *psys, *npsys;
        ModifierData *md;

        obn->particlesystem.first= obn->particlesystem.last= NULL;
        for(psys=ob->particlesystem.first; psys; psys=psys->next) {
                npsys= copy_particlesystem(psys);

                BLI_addtail(&obn->particlesystem, npsys);

                /* need to update particle modifiers too */
                for(md=obn->modifiers.first; md; md=md->next) {
                        if(md->type==eModifierType_ParticleSystem) {
                                psmd= (ParticleSystemModifierData*)md;
                                if(psmd->psys==psys)
                                        psmd->psys= npsys;
                        }
                }
        }
}

void copy_object_softbody(Object *obn, Object *ob)
{
        if(ob->soft)
                obn->soft= copy_softbody(ob->soft);
}

static void copy_object_pose(Object *obn, Object *ob)
{
        bPoseChannel *chan;
        
        /* note: need to clear obn->pose pointer first, so that copy_pose works (otherwise there's a crash) */
        obn->pose= NULL;
        copy_pose(&obn->pose, ob->pose, 1);     /* 1 = copy constraints */

        for (chan = obn->pose->chanbase.first; chan; chan=chan->next){
                bConstraint *con;
                
                chan->flag &= ~(POSE_LOC|POSE_ROT|POSE_SIZE);
                
                for (con= chan->constraints.first; con; con= con->next) {
                        bConstraintTypeInfo *cti= constraint_get_typeinfo(con);
                        ListBase targets = {NULL, NULL};
                        bConstraintTarget *ct;
                        
#if 0 // XXX old animation system
                        /* note that we can't change lib linked ipo blocks. for making
                         * proxies this still works correct however because the object
                         * is changed to object->proxy_from when evaluating the driver. */
                        if(con->ipo && !con->ipo->id.lib) {
                                IpoCurve *icu;
                                
                                con->ipo= copy_ipo(con->ipo);
                                
                                for(icu= con->ipo->curve.first; icu; icu= icu->next) {
                                        if(icu->driver && icu->driver->ob==ob)
                                                icu->driver->ob= obn;
                                }
                        }
#endif // XXX old animation system
                        
                        if (cti && cti->get_constraint_targets) {
                                cti->get_constraint_targets(con, &targets);
                                
                                for (ct= targets.first; ct; ct= ct->next) {
                                        if (ct->tar == ob)
                                                ct->tar = obn;
                                }
                                
                                if (cti->flush_constraint_targets)
                                        cti->flush_constraint_targets(con, &targets, 0);
                        }
                }
        }
}

static void copy_object_transform(Object *ob_tar, Object *ob_src)
{
        copy_v3_v3(ob_tar->loc, ob_src->loc);
        copy_v3_v3(ob_tar->rot, ob_src->rot);
        copy_v3_v3(ob_tar->quat, ob_src->quat);
        copy_v3_v3(ob_tar->rotAxis, ob_src->rotAxis);
        ob_tar->rotAngle= ob_src->rotAngle;
        ob_tar->rotmode= ob_src->rotmode;
        copy_v3_v3(ob_tar->size, ob_src->size);
}

Object *copy_object(Object *ob)
{
        Object *obn;
        ModifierData *md;
        int a;

        obn= copy_libblock(ob);
        
        if(ob->totcol) {
                obn->mat= MEM_dupallocN(ob->mat);
                obn->matbits= MEM_dupallocN(ob->matbits);
                obn->totcol= ob->totcol;
        }
        
        if(ob->bb) obn->bb= MEM_dupallocN(ob->bb);
        obn->path= NULL;
        obn->flag &= ~OB_FROMGROUP;
        
        obn->modifiers.first = obn->modifiers.last= NULL;
        
        for (md=ob->modifiers.first; md; md=md->next) {
                ModifierData *nmd = modifier_new(md->type);
                BLI_strncpy(nmd->name, md->name, sizeof(nmd->name));
                modifier_copyData(md, nmd);
                BLI_addtail(&obn->modifiers, nmd);
        }

        obn->prop.first = obn->prop.last = NULL;
        copy_properties(&obn->prop, &ob->prop);
        
        copy_sensors(&obn->sensors, &ob->sensors);
        copy_controllers(&obn->controllers, &ob->controllers);
        copy_actuators(&obn->actuators, &ob->actuators);
        
        if(ob->pose) {
                copy_object_pose(obn, ob);
                /* backwards compat... non-armatures can get poses in older files? */
                if(ob->type==OB_ARMATURE)
                        armature_rebuild_pose(obn, obn->data);
        }
        defgroup_copy_list(&obn->defbase, &ob->defbase);
        copy_constraints(&obn->constraints, &ob->constraints, TRUE);

        obn->mode = 0;
        obn->sculpt = NULL;

        /* increase user numbers */
        id_us_plus((ID *)obn->data);
        id_us_plus((ID *)obn->gpd);
        id_lib_extern((ID *)obn->dup_group);

        for(a=0; a<obn->totcol; a++) id_us_plus((ID *)obn->mat[a]);
        
        obn->disp.first= obn->disp.last= NULL;
        
        if(ob->pd){
                obn->pd= MEM_dupallocN(ob->pd);
                if(obn->pd->tex)
                        id_us_plus(&(obn->pd->tex->id));
                if(obn->pd->rng)
                        obn->pd->rng = MEM_dupallocN(ob->pd->rng);
        }
        obn->soft= copy_softbody(ob->soft);
        obn->bsoft = copy_bulletsoftbody(ob->bsoft);

        copy_object_particlesystems(obn, ob);
        
        obn->derivedDeform = NULL;
        obn->derivedFinal = NULL;

        obn->gpulamp.first = obn->gpulamp.last = NULL;
        obn->pc_ids.first = obn->pc_ids.last = NULL;

        obn->mpath= NULL;
        
        return obn;
}

static void extern_local_object(Object *ob)
{
        //bActionStrip *strip;
        ParticleSystem *psys;

#if 0 // XXX old animation system
        id_lib_extern((ID *)ob->action);
        id_lib_extern((ID *)ob->ipo);
#endif // XXX old animation system
        id_lib_extern((ID *)ob->data);
        id_lib_extern((ID *)ob->dup_group);
        id_lib_extern((ID *)ob->poselib);
        id_lib_extern((ID *)ob->gpd);

        extern_local_matarar(ob->mat, ob->totcol);

#if 0 // XXX old animation system
        for (strip=ob->nlastrips.first; strip; strip=strip->next) {
                id_lib_extern((ID *)strip->act);
        }
#endif // XXX old animation system
        for(psys=ob->particlesystem.first; psys; psys=psys->next)
                id_lib_extern((ID *)psys->part);
}

void make_local_object(Object *ob)
{
        Main *bmain= G.main;
        Scene *sce;
        Base *base;
        int local=0, lib=0;

        /* - only lib users: do nothing
         * - only local users: set flag
         * - mixed: make copy
         */

        if(ob->id.lib==NULL) return;
        
        ob->proxy= ob->proxy_from= NULL;
        
        if(ob->id.us==1) {
                ob->id.lib= NULL;
                ob->id.flag= LIB_LOCAL;
                new_id(&bmain->object, (ID *)ob, NULL);
        }
        else {
                for(sce= bmain->scene.first; sce && ELEM(0, lib, local); sce= sce->id.next) {
                        if(object_in_scene(ob, sce)) {
                                if(sce->id.lib) lib= 1;
                                else local= 1;
                        }
                }

                if(local && lib==0) {
                        ob->id.lib= NULL;
                        ob->id.flag= LIB_LOCAL;
                        new_id(&bmain->object, (ID *)ob, NULL);
                }
                else if(local && lib) {
                        Object *obn= copy_object(ob);
                        obn->id.us= 0;
                        
                        sce= bmain->scene.first;
                        while(sce) {
                                if(sce->id.lib==NULL) {
                                        base= sce->base.first;
                                        while(base) {
                                                if(base->object==ob) {
                                                        base->object= obn;
                                                        obn->id.us++;
                                                        ob->id.us--;
                                                }
                                                base= base->next;
                                        }
                                }
                                sce= sce->id.next;
                        }
                }
        }
        
        extern_local_object(ob);
}

/*
 * Returns true if the Object is a from an external blend file (libdata)
 */
int object_is_libdata(Object *ob)
{
        if (!ob) return 0;
        if (ob->proxy) return 0;
        if (ob->id.lib) return 1;
        return 0;
}

/* Returns true if the Object data is a from an external blend file (libdata) */
int object_data_is_libdata(Object *ob)
{
        if(!ob) return 0;
        if(ob->proxy && (ob->data==NULL || ((ID *)ob->data)->lib==NULL)) return 0;
        if(ob->id.lib) return 1;
        if(ob->data==NULL) return 0;
        if(((ID *)ob->data)->lib) return 1;

        return 0;
}

/* *************** PROXY **************** */

/* when you make proxy, ensure the exposed layers are extern */
static void armature_set_id_extern(Object *ob)
{
        bArmature *arm= ob->data;
        bPoseChannel *pchan;
        unsigned int lay= arm->layer_protected;
        
        for (pchan = ob->pose->chanbase.first; pchan; pchan=pchan->next) {
                if(!(pchan->bone->layer & lay))
                        id_lib_extern((ID *)pchan->custom);
        }
                        
}

void object_copy_proxy_drivers(Object *ob, Object *target)
{
        if ((target->adt) && (target->adt->drivers.first)) {
                FCurve *fcu;
                
                /* add new animdata block */
                if(!ob->adt)
                        ob->adt= BKE_id_add_animdata(&ob->id);
                
                /* make a copy of all the drivers (for now), then correct any links that need fixing */
                free_fcurves(&ob->adt->drivers);
                copy_fcurves(&ob->adt->drivers, &target->adt->drivers);
                
                for (fcu= ob->adt->drivers.first; fcu; fcu= fcu->next) {
                        ChannelDriver *driver= fcu->driver;
                        DriverVar *dvar;
                        
                        for (dvar= driver->variables.first; dvar; dvar= dvar->next) {
                                /* all drivers */
                                DRIVER_TARGETS_LOOPER(dvar) 
                                {
                                        if(dtar->id) {
                                                if ((Object *)dtar->id == target)
                                                        dtar->id= (ID *)ob;
                                                else {
                                                        /* only on local objects because this causes indirect links a -> b -> c,blend to point directly to a.blend
                                                         * when a.blend has a proxy thats linked into c.blend  */
                                                        if(ob->id.lib==NULL)
                                                                id_lib_extern((ID *)dtar->id);
                                                }
                                        }
                                }
                                DRIVER_TARGETS_LOOPER_END
                        }
                }
        }
}

/* proxy rule: lib_object->proxy_from == the one we borrow from, set temporally while object_update */
/*             local_object->proxy == pointer to library object, saved in files and read */
/*             local_object->proxy_group == pointer to group dupli-object, saved in files and read */

void object_make_proxy(Object *ob, Object *target, Object *gob)
{
        /* paranoia checks */
        if(ob->id.lib || target->id.lib==NULL) {
                printf("cannot make proxy\n");
                return;
        }
        
        ob->proxy= target;
        ob->proxy_group= gob;
        id_lib_extern(&target->id);
        
        ob->recalc= target->recalc= OB_RECALC_OB|OB_RECALC_DATA|OB_RECALC_TIME;
        
        /* copy transform
         * - gob means this proxy comes from a group, just apply the matrix
         *   so the object wont move from its dupli-transform.
         *
         * - no gob means this is being made from a linked object,
         *   this is closer to making a copy of the object - in-place. */
        if(gob) {
                ob->rotmode= target->rotmode;
                mul_m4_m4m4(ob->obmat, target->obmat, gob->obmat);
                if(gob->dup_group) { /* should always be true */
                        float tvec[3];
                        copy_v3_v3(tvec, gob->dup_group->dupli_ofs);
                        mul_mat3_m4_v3(ob->obmat, tvec);
                        sub_v3_v3(ob->obmat[3], tvec);
                }
                object_apply_mat4(ob, ob->obmat, FALSE, TRUE);
        }
        else {
                copy_object_transform(ob, target);
                ob->parent= target->parent;     /* libdata */
                copy_m4_m4(ob->parentinv, target->parentinv);
        }
        
        /* copy animdata stuff - drivers only for now... */
        object_copy_proxy_drivers(ob, target);

        /* skip constraints? */
        // FIXME: this is considered by many as a bug
        
        /* set object type and link to data */
        ob->type= target->type;
        ob->data= target->data;
        id_us_plus((ID *)ob->data);             /* ensures lib data becomes LIB_EXTERN */
        
        /* copy material and index information */
        ob->actcol= ob->totcol= 0;
        if(ob->mat) MEM_freeN(ob->mat);
        if(ob->matbits) MEM_freeN(ob->matbits);
        ob->mat = NULL;
        ob->matbits= NULL;
        if ((target->totcol) && (target->mat) && ELEM5(ob->type, OB_MESH, OB_CURVE, OB_SURF, OB_FONT, OB_MBALL)) { //XXX OB_SUPPORT_MATERIAL
                int i;
                ob->colbits = target->colbits;
                
                ob->actcol= target->actcol;
                ob->totcol= target->totcol;
                
                ob->mat = MEM_dupallocN(target->mat);
                ob->matbits = MEM_dupallocN(target->matbits);
                for(i=0; i<target->totcol; i++) {
                        /* dont need to run test_object_materials since we know this object is new and not used elsewhere */
                        id_us_plus((ID *)ob->mat[i]); 
                }
        }
        
        /* type conversions */
        if(target->type == OB_ARMATURE) {
                copy_object_pose(ob, target);   /* data copy, object pointers in constraints */
                rest_pose(ob->pose);                    /* clear all transforms in channels */
                armature_rebuild_pose(ob, ob->data);    /* set all internal links */
                
                armature_set_id_extern(ob);
        }
        else if (target->type == OB_EMPTY) {
                ob->empty_drawtype = target->empty_drawtype;
                ob->empty_drawsize = target->empty_drawsize;
        }

        /* copy IDProperties */
        if(ob->id.properties) {
                IDP_FreeProperty(ob->id.properties);
                MEM_freeN(ob->id.properties);
                ob->id.properties= NULL;
        }
        if(target->id.properties) {
                ob->id.properties= IDP_CopyProperty(target->id.properties);
        }

        /* copy drawtype info */
        ob->dt= target->dt;
}


/* *************** CALC ****************** */

/* there is also a timing calculation in drawobject() */


// XXX THIS CRUFT NEEDS SERIOUS RECODING ASAP!
/* ob can be NULL */
float bsystem_time(struct Scene *scene, Object *UNUSED(ob), float cfra, float ofs)
{
        /* returns float ( see BKE_curframe in scene.c) */
        cfra += scene->r.subframe;
        
        /* global time */
        if (scene)
                cfra*= scene->r.framelen;       
        
#if 0 // XXX old animation system
        if (ob) {
                /* ofset frames */
                if ((ob->ipoflag & OB_OFFS_PARENT) && (ob->partype & PARSLOW)==0) 
                        cfra-= give_timeoffset(ob);
        }
#endif // XXX old animation system
        
        cfra-= ofs;

        return cfra;
}

void object_scale_to_mat3(Object *ob, float mat[][3])
{
        float vec[3];
        add_v3_v3v3(vec, ob->size, ob->dsize);
        size_to_mat3( mat,vec);
}


void object_rot_to_mat3(Object *ob, float mat[][3])
{
        float rmat[3][3], dmat[3][3];
        
        /* 'dmat' is the delta-rotation matrix, which will get (pre)multiplied
         * with the rotation matrix to yield the appropriate rotation
         */

        /* rotations may either be quats, eulers (with various rotation orders), or axis-angle */
        if (ob->rotmode > 0) {
                /* euler rotations (will cause gimble lock, but this can be alleviated a bit with rotation orders) */
                eulO_to_mat3(rmat, ob->rot, ob->rotmode);
                eulO_to_mat3(dmat, ob->drot, ob->rotmode);
        }
        else if (ob->rotmode == ROT_MODE_AXISANGLE) {
                /* axis-angle -  not really that great for 3D-changing orientations */
                axis_angle_to_mat3(rmat, ob->rotAxis, ob->rotAngle);
                axis_angle_to_mat3(dmat, ob->drotAxis, ob->drotAngle);
        }
        else {
                /* quats are normalised before use to eliminate scaling issues */
                float tquat[4];
                
                normalize_qt_qt(tquat, ob->quat);
                quat_to_mat3(rmat, tquat);
                
                normalize_qt_qt(tquat, ob->dquat);
                quat_to_mat3(dmat, tquat);
        }
        
        /* combine these rotations */
        mul_m3_m3m3(mat, dmat, rmat);
}

void object_mat3_to_rot(Object *ob, float mat[][3], short use_compat)
{
        switch(ob->rotmode) {
        case ROT_MODE_QUAT:
                {
                        float dquat[4];
                        mat3_to_quat(ob->quat, mat);
                        normalize_qt_qt(dquat, ob->dquat);
                        invert_qt(dquat);
                        mul_qt_qtqt(ob->quat, dquat, ob->quat);
                }
                break;
        case ROT_MODE_AXISANGLE:
                mat3_to_axis_angle(ob->rotAxis, &ob->rotAngle, mat);
                sub_v3_v3(ob->rotAxis, ob->drotAxis);
                ob->rotAngle -= ob->drotAngle;
                break;
        default: /* euler */
                {
                        float quat[4];
                        float dquat[4];
                        float tmat[3][3];

                        /* without drot we could apply 'mat' directly */
                        mat3_to_quat(quat, mat);
                        eulO_to_quat(dquat, ob->drot, ob->rotmode);
                        invert_qt(dquat);
                        mul_qt_qtqt(quat, dquat, quat);
                        quat_to_mat3(tmat, quat);
                        /* end drot correction */

                        if(use_compat)  mat3_to_compatible_eulO(ob->rot, ob->rot, ob->rotmode, tmat);
                        else                    mat3_to_eulO(ob->rot, ob->rotmode, tmat);
                }
        }
}

/* see pchan_apply_mat4() for the equivalent 'pchan' function */
void object_apply_mat4(Object *ob, float mat[][4], const short use_compat, const short use_parent)
{
        float rot[3][3];

        if(use_parent && ob->parent) {
                float rmat[4][4], diff_mat[4][4], imat[4][4];
                mul_m4_m4m4(diff_mat, ob->parentinv, ob->parent->obmat);
                invert_m4_m4(imat, diff_mat);
                mul_m4_m4m4(rmat, mat, imat); /* get the parent relative matrix */
                object_apply_mat4(ob, rmat, use_compat, FALSE);
                
                /* same as below, use rmat rather than mat */
                mat4_to_loc_rot_size(ob->loc, rot, ob->size, rmat);
                object_mat3_to_rot(ob, rot, use_compat);
        }
        else {
                mat4_to_loc_rot_size(ob->loc, rot, ob->size, mat);
                object_mat3_to_rot(ob, rot, use_compat);
        }
        
        sub_v3_v3(ob->loc, ob->dloc);
        sub_v3_v3(ob->size, ob->dsize);
        /* object_mat3_to_rot handles delta rotations */
}

void object_to_mat3(Object *ob, float mat[][3]) /* no parent */
{
        float smat[3][3];
        float rmat[3][3];
        /*float q1[4];*/
        
        /* size */
        object_scale_to_mat3(ob, smat);

        /* rot */
        object_rot_to_mat3(ob, rmat);
        mul_m3_m3m3(mat, rmat, smat);
}

void object_to_mat4(Object *ob, float mat[][4])
{
        float tmat[3][3];
        
        object_to_mat3(ob, tmat);
        
        copy_m4_m3(mat, tmat);

        add_v3_v3v3(mat[3], ob->loc, ob->dloc);
}

/* extern */
int enable_cu_speed= 1;

static void ob_parcurve(Scene *scene, Object *ob, Object *par, float mat[][4])
{
        Curve *cu;
        float vec[4], dir[3], quat[4], radius, ctime;
        float timeoffs = 0.0, sf_orig = 0.0;
        
        unit_m4(mat);
        
        cu= par->data;
        if(cu->path==NULL || cu->path->data==NULL) /* only happens on reload file, but violates depsgraph still... fix! */
                makeDispListCurveTypes(scene, par, 0);
        if(cu->path==NULL) return;
        
        /* exception, timeoffset is regarded as distance offset */
        if(cu->flag & CU_OFFS_PATHDIST) {
                timeoffs = give_timeoffset(ob);
                SWAP(float, sf_orig, ob->sf);
        }
        
        /* catch exceptions: feature for nla stride editing */
        if(ob->ipoflag & OB_DISABLE_PATH) {
                ctime= 0.0f;
        }
        /* catch exceptions: curve paths used as a duplicator */
        else if(enable_cu_speed) {
                /* ctime is now a proper var setting of Curve which gets set by Animato like any other var that's animated,
                 * but this will only work if it actually is animated... 
                 *
                 * we divide the curvetime calculated in the previous step by the length of the path, to get a time
                 * factor, which then gets clamped to lie within 0.0 - 1.0 range
                 */
                if (IS_EQF(cu->pathlen, 0.0f) == 0)
                        ctime= cu->ctime / cu->pathlen;
                else
                        ctime= cu->ctime;

                CLAMP(ctime, 0.0f, 1.0f);
        }
        else {
                ctime= scene->r.cfra - give_timeoffset(ob);
                if (IS_EQF(cu->pathlen, 0.0f) == 0)
                        ctime /= cu->pathlen;
                
                CLAMP(ctime, 0.0f, 1.0f);
        }
        
        /* time calculus is correct, now apply distance offset */
        if(cu->flag & CU_OFFS_PATHDIST) {
                ctime += timeoffs/cu->path->totdist;

                /* restore */
                SWAP(float, sf_orig, ob->sf);
        }
        
        
        /* vec: 4 items! */
        if( where_on_path(par, ctime, vec, dir, cu->flag & CU_FOLLOW ? quat:NULL, &radius, NULL) ) {

                if(cu->flag & CU_FOLLOW) {
#if 0
                        float x1, q[4];
                        vec_to_quat( quat,dir, ob->trackflag, ob->upflag);
                        
                        /* the tilt */
                        normalize_v3(dir);
                        q[0]= (float)cos(0.5*vec[3]);
                        x1= (float)sin(0.5*vec[3]);
                        q[1]= -x1*dir[0];
                        q[2]= -x1*dir[1];
                        q[3]= -x1*dir[2];
                        mul_qt_qtqt(quat, q, quat);
#else
                        quat_apply_track(quat, ob->trackflag, ob->upflag);
#endif
                        normalize_qt(quat);
                        quat_to_mat4(mat, quat);
                }
                
                if(cu->flag & CU_PATH_RADIUS) {
                        float tmat[4][4], rmat[4][4];
                        scale_m4_fl(tmat, radius);
                        mul_m4_m4m4(rmat, mat, tmat);
                        copy_m4_m4(mat, rmat);
                }

                copy_v3_v3(mat[3], vec);
                
        }
}

static void ob_parbone(Object *ob, Object *par, float mat[][4])
{       
        bPoseChannel *pchan;
        float vec[3];
        
        if (par->type!=OB_ARMATURE) {
                unit_m4(mat);
                return;
        }
        
        /* Make sure the bone is still valid */
        pchan= get_pose_channel(par->pose, ob->parsubstr);
        if (!pchan){
                printf ("Object %s with Bone parent: bone %s doesn't exist\n", ob->id.name+2, ob->parsubstr);
                unit_m4(mat);
                return;
        }

        /* get bone transform */
        copy_m4_m4(mat, pchan->pose_mat);

        /* but for backwards compatibility, the child has to move to the tail */
        copy_v3_v3(vec, mat[1]);
        mul_v3_fl(vec, pchan->bone->length);
        add_v3_v3(mat[3], vec);
}

static void give_parvert(Object *par, int nr, float *vec)
{
        EditMesh *em;
        int a, count;
        
        vec[0]=vec[1]=vec[2]= 0.0f;
        
        if(par->type==OB_MESH) {
                Mesh *me= par->data;
                DerivedMesh *dm;

                em = BKE_mesh_get_editmesh(me);
                dm = (em)? em->derivedFinal: par->derivedFinal;
                        
                if(dm) {
                        MVert *mvert= dm->getVertArray(dm);
                        int *index = (int *)dm->getVertDataArray(dm, CD_ORIGINDEX);
                        int i, vindex, numVerts = dm->getNumVerts(dm);

                        /* get the average of all verts with (original index == nr) */
                        count= 0;
                        for(i = 0; i < numVerts; i++) {
                                vindex= (index)? index[i]: i;

                                if(vindex == nr) {
                                        add_v3_v3(vec, mvert[i].co);
                                        count++;
                                }
                        }

                        if (count==0) {
                                /* keep as 0,0,0 */
                        } else if(count > 0) {
                                mul_v3_fl(vec, 1.0f / count);
                        } else {
                                /* use first index if its out of range */
                                dm->getVertCo(dm, 0, vec);
                        }
                }

                if(em)
                        BKE_mesh_end_editmesh(me, em);
        }
        else if (ELEM(par->type, OB_CURVE, OB_SURF)) {
                Nurb *nu;
                Curve *cu;
                BPoint *bp;
                BezTriple *bezt;
                int found= 0;
                ListBase *nurbs;

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

                count= 0;
                while(nu && !found) {
                        if(nu->type == CU_BEZIER) {
                                bezt= nu->bezt;
                                a= nu->pntsu;
                                while(a--) {
                                        if(count==nr) {
                                                found= 1;
                                                VECCOPY(vec, bezt->vec[1]);
                                                break;
                                        }
                                        count++;
                                        bezt++;
                                }
                        }
                        else {
                                bp= nu->bp;
                                a= nu->pntsu*nu->pntsv;
                                while(a--) {
                                        if(count==nr) {
                                                found= 1;
                                                memcpy(vec, bp->vec, sizeof(float)*3);
                                                break;
                                        }
                                        count++;
                                        bp++;
                                }
                        }
                        nu= nu->next;
                }

        }
        else if(par->type==OB_LATTICE) {
                Lattice *latt= par->data;
                BPoint *bp;
                DispList *dl = find_displist(&par->disp, DL_VERTS);
                float *co = dl?dl->verts:NULL;
                
                if(latt->editlatt) latt= latt->editlatt->latt;
                
                a= latt->pntsu*latt->pntsv*latt->pntsw;
                count= 0;
                bp= latt->def;
                while(a--) {
                        if(count==nr) {
                                if(co)
                                        memcpy(vec, co, 3*sizeof(float));
                                else
                                        memcpy(vec, bp->vec, 3*sizeof(float));
                                break;
                        }
                        count++;
                        if(co) co+= 3;
                        else bp++;
                }
        }
}

static void ob_parvert3(Object *ob, Object *par, float mat[][4])
{
        float cmat[3][3], v1[3], v2[3], v3[3], q[4];

        /* in local ob space */
        unit_m4(mat);
        
        if (ELEM4(par->type, OB_MESH, OB_SURF, OB_CURVE, OB_LATTICE)) {
                
                give_parvert(par, ob->par1, v1);
                give_parvert(par, ob->par2, v2);
                give_parvert(par, ob->par3, v3);
                                
                tri_to_quat( q,v1, v2, v3);
                quat_to_mat3( cmat,q);
                copy_m4_m3(mat, cmat);
                
                if(ob->type==OB_CURVE) {
                        VECCOPY(mat[3], v1);
                }
                else {
                        add_v3_v3v3(mat[3], v1, v2);
                        add_v3_v3(mat[3], v3);
                        mul_v3_fl(mat[3], 0.3333333f);
                }
        }
}

// XXX what the hell is this?
static int no_parent_ipo=0;
void set_no_parent_ipo(int val)
{
        no_parent_ipo= val;
}

void where_is_object_time(Scene *scene, Object *ob, float ctime)
{
        float *fp1, *fp2, slowmat[4][4] = MAT4_UNITY;
        float stime=ctime, fac1, fac2;
        int a;
        
        /* new version: correct parent+vertexparent and track+parent */
        /* this one only calculates direct attached parent and track */
        /* is faster, but should keep track of timeoffs */
        
        if(ob==NULL) return;
        
        /* execute drivers only, as animation has already been done */
        BKE_animsys_evaluate_animdata(&ob->id, ob->adt, ctime, ADT_RECALC_DRIVERS);
        
        if(ob->parent) {
                Object *par= ob->parent;
                
                // XXX depreceated - animsys
                if(ob->ipoflag & OB_OFFS_PARENT) ctime-= give_timeoffset(ob);
                
                /* hurms, code below conflicts with depgraph... (ton) */
                /* and even worse, it gives bad effects for NLA stride too (try ctime != par->ctime, with MBlur) */
                if(no_parent_ipo==0 && stime != par->ctime) {
                        // only for ipo systems? 
                        Object tmp= *par;
                        
                        if(par->proxy_from);    // was a copied matrix, no where_is! bad...
                        else where_is_object_time(scene, par, ctime);

                        solve_parenting(scene, ob, par, ob->obmat, slowmat, 0);

                        *par= tmp;
                }
                else
                        solve_parenting(scene, ob, par, ob->obmat, slowmat, 0);
                
                if(ob->partype & PARSLOW) {
                        // include framerate
                        fac1= ( 1.0f / (1.0f + (float)fabs(give_timeoffset(ob))) );
                        if(fac1 >= 1.0f) return;
                        fac2= 1.0f-fac1;
                        
                        fp1= ob->obmat[0];
                        fp2= slowmat[0];
                        for(a=0; a<16; a++, fp1++, fp2++) {
                                fp1[0]= fac1*fp1[0] + fac2*fp2[0];
                        }
                }
        }
        else {
                object_to_mat4(ob, ob->obmat);
        }

        /* solve constraints */
        if (ob->constraints.first && !(ob->transflag & OB_NO_CONSTRAINTS)) {
                bConstraintOb *cob;
                
                cob= constraints_make_evalob(scene, ob, NULL, CONSTRAINT_OBTYPE_OBJECT);
                
                /* constraints need ctime, not stime. Some call where_is_object_time and bsystem_time */
                solve_constraints (&ob->constraints, cob, ctime);
                
                constraints_clear_evalob(cob);
        }
        
        /* set negative scale flag in object */
        if(is_negative_m4(ob->obmat))   ob->transflag |= OB_NEG_SCALE;
        else                                                    ob->transflag &= ~OB_NEG_SCALE;
}

static void solve_parenting (Scene *scene, Object *ob, Object *par, float obmat[][4], float slowmat[][4], int simul)
{
        float totmat[4][4];
        float tmat[4][4];
        float locmat[4][4];
        float vec[3];
        int ok;
        
        object_to_mat4(ob, locmat);
        
        if(ob->partype & PARSLOW) copy_m4_m4(slowmat, obmat);

        switch(ob->partype & PARTYPE) {
        case PAROBJECT:
                ok= 0;
                if(par->type==OB_CURVE) {
                        if( ((Curve *)par->data)->flag & CU_PATH ) {
                                ob_parcurve(scene, ob, par, tmat);
                                ok= 1;
                        }
                }
                
                if(ok) mul_serie_m4(totmat, par->obmat, tmat, 
                        NULL, NULL, NULL, NULL, NULL, NULL);
                else copy_m4_m4(totmat, par->obmat);
                
                break;
        case PARBONE:
                ob_parbone(ob, par, tmat);
                mul_serie_m4(totmat, par->obmat, tmat,         
                        NULL, NULL, NULL, NULL, NULL, NULL);
                break;
                
        case PARVERT1:
                unit_m4(totmat);
                if (simul){
                        VECCOPY(totmat[3], par->obmat[3]);
                }
                else{
                        give_parvert(par, ob->par1, vec);
                        mul_v3_m4v3(totmat[3], par->obmat, vec);
                }
                break;
        case PARVERT3:
                ob_parvert3(ob, par, tmat);
                
                mul_serie_m4(totmat, par->obmat, tmat,         
                        NULL, NULL, NULL, NULL, NULL, NULL);
                break;
                
        case PARSKEL:
                copy_m4_m4(totmat, par->obmat);
                break;
        }
        
        // total 
        mul_serie_m4(tmat, totmat, ob->parentinv,         
                NULL, NULL, NULL, NULL, NULL, NULL);
        mul_serie_m4(obmat, tmat, locmat,         
                NULL, NULL, NULL, NULL, NULL, NULL);
        
        if (simul) {

        }
        else{
                // external usable originmat 
                copy_m3_m4(originmat, tmat);
                
                // origin, voor help line
                if( (ob->partype & PARTYPE)==PARSKEL ) {
                        VECCOPY(ob->orig, par->obmat[3]);
                }
                else {
                        VECCOPY(ob->orig, totmat[3]);
                }
        }

}

void where_is_object(struct Scene *scene, Object *ob)
{
        where_is_object_time(scene, ob, (float)scene->r.cfra);
}


void where_is_object_simul(Scene *scene, Object *ob)
/* was written for the old game engine (until 2.04) */
/* It seems that this function is only called
for a lamp that is the child of another object */
{
        Object *par;
        //Ipo *ipo;
        float *fp1, *fp2;
        float slowmat[4][4];
        float fac1, fac2;
        int a;
        
        /* NO TIMEOFFS */
        if(ob->parent) {
                par= ob->parent;
                
                solve_parenting(scene, ob, par, ob->obmat, slowmat, 1);

                if(ob->partype & PARSLOW) {

                        fac1= (float)(1.0/(1.0+ fabs(give_timeoffset(ob))));
                        fac2= 1.0f-fac1;
                        fp1= ob->obmat[0];
                        fp2= slowmat[0];
                        for(a=0; a<16; a++, fp1++, fp2++) {
                                fp1[0]= fac1*fp1[0] + fac2*fp2[0];
                        }
                }
                
        }
        else {
                object_to_mat4(ob, ob->obmat);
        }
        
        /* solve constraints */
        if (ob->constraints.first) {
                bConstraintOb *cob;
                
                cob= constraints_make_evalob(scene, ob, NULL, CONSTRAINT_OBTYPE_OBJECT);
                solve_constraints(&ob->constraints, cob, (float)scene->r.cfra);
                constraints_clear_evalob(cob);
        }
}

/* for calculation of the inverse parent transform, only used for editor */
void what_does_parent(Scene *scene, Object *ob, Object *workob)
{
        clear_workob(workob);
        
        unit_m4(workob->obmat);
        unit_m4(workob->parentinv);
        unit_m4(workob->constinv);
        workob->parent= ob->parent;

        workob->trackflag= ob->trackflag;
        workob->upflag= ob->upflag;
        
        workob->partype= ob->partype;
        workob->par1= ob->par1;
        workob->par2= ob->par2;
        workob->par3= ob->par3;

        workob->constraints.first = ob->constraints.first;
        workob->constraints.last = ob->constraints.last;

        BLI_strncpy(workob->parsubstr, ob->parsubstr, sizeof(workob->parsubstr));

        where_is_object(scene, workob);
}

BoundBox *unit_boundbox(void)
{
        BoundBox *bb;
        float min[3] = {-1.0f,-1.0f,-1.0f}, max[3] = {-1.0f,-1.0f,-1.0f};

        bb= MEM_callocN(sizeof(BoundBox), "bb");
        boundbox_set_from_min_max(bb, min, max);
        
        return bb;
}

void boundbox_set_from_min_max(BoundBox *bb, float min[3], float max[3])
{
        bb->vec[0][0]=bb->vec[1][0]=bb->vec[2][0]=bb->vec[3][0]= min[0];
        bb->vec[4][0]=bb->vec[5][0]=bb->vec[6][0]=bb->vec[7][0]= max[0];
        
        bb->vec[0][1]=bb->vec[1][1]=bb->vec[4][1]=bb->vec[5][1]= min[1];
        bb->vec[2][1]=bb->vec[3][1]=bb->vec[6][1]=bb->vec[7][1]= max[1];

        bb->vec[0][2]=bb->vec[3][2]=bb->vec[4][2]=bb->vec[7][2]= min[2];
        bb->vec[1][2]=bb->vec[2][2]=bb->vec[5][2]=bb->vec[6][2]= max[2];
}

BoundBox *object_get_boundbox(Object *ob)
{
        BoundBox *bb= NULL;
        
        if(ob->type==OB_MESH) {
                bb = mesh_get_bb(ob);
        }
        else if (ELEM3(ob->type, OB_CURVE, OB_SURF, OB_FONT)) {
                bb= ob->bb ? ob->bb : ( (Curve *)ob->data )->bb;
        }
        else if(ob->type==OB_MBALL) {
                bb= ob->bb;
        }
        return bb;
}

/* used to temporally disable/enable boundbox */
void object_boundbox_flag(Object *ob, int flag, int set)
{
        BoundBox *bb= object_get_boundbox(ob);
        if(bb) {
                if(set) bb->flag |= flag;
                else bb->flag &= ~flag;
        }
}

void object_get_dimensions(Object *ob, float *value)
{
        BoundBox *bb = NULL;
        
        bb= object_get_boundbox(ob);
        if (bb) {
                float scale[3];
                
                mat4_to_size( scale,ob->obmat);
                
                value[0] = fabsf(scale[0]) * (bb->vec[4][0] - bb->vec[0][0]);
                value[1] = fabsf(scale[1]) * (bb->vec[2][1] - bb->vec[0][1]);
                value[2] = fabsf(scale[2]) * (bb->vec[1][2] - bb->vec[0][2]);
        } else {
                value[0] = value[1] = value[2] = 0.f;
        }
}

void object_set_dimensions(Object *ob, const float *value)
{
        BoundBox *bb = NULL;
        
        bb= object_get_boundbox(ob);
        if (bb) {
                float scale[3], len[3];
                
                mat4_to_size( scale,ob->obmat);
                
                len[0] = bb->vec[4][0] - bb->vec[0][0];
                len[1] = bb->vec[2][1] - bb->vec[0][1];
                len[2] = bb->vec[1][2] - bb->vec[0][2];
                
                if (len[0] > 0.f) ob->size[0] = value[0] / len[0];
                if (len[1] > 0.f) ob->size[1] = value[1] / len[1];
                if (len[2] > 0.f) ob->size[2] = value[2] / len[2];
        }
}

void minmax_object(Object *ob, float *min, float *max)
{
        BoundBox bb;
        float vec[3];
        int a;
        short change= FALSE;
        
        switch(ob->type) {
        case OB_CURVE:
        case OB_FONT:
        case OB_SURF:
                {
                        Curve *cu= ob->data;

                        if(cu->bb==NULL) tex_space_curve(cu);
                        bb= *(cu->bb);

                        for(a=0; a<8; a++) {
                                mul_m4_v3(ob->obmat, bb.vec[a]);
                                DO_MINMAX(bb.vec[a], min, max);
                        }
                        change= TRUE;
                }
                break;
        case OB_LATTICE:
                {
                        Lattice *lt= ob->data;
                        BPoint *bp= lt->def;
                        int u, v, w;

                        for(w=0; w<lt->pntsw; w++) {
                                for(v=0; v<lt->pntsv; v++) {
                                        for(u=0; u<lt->pntsu; u++, bp++) {
                                                mul_v3_m4v3(vec, ob->obmat, bp->vec);
                                                DO_MINMAX(vec, min, max);
                                        }
                                }
                        }
                        change= TRUE;
                }
                break;
        case OB_ARMATURE:
                if(ob->pose) {
                        bPoseChannel *pchan;
                        for(pchan= ob->pose->chanbase.first; pchan; pchan= pchan->next) {
                                mul_v3_m4v3(vec, ob->obmat, pchan->pose_head);
                                DO_MINMAX(vec, min, max);
                                mul_v3_m4v3(vec, ob->obmat, pchan->pose_tail);
                                DO_MINMAX(vec, min, max);
                        }
                        change= TRUE;
                }
                break;
        case OB_MESH:
                {
                        Mesh *me= get_mesh(ob);

                        if(me) {
                                bb = *mesh_get_bb(ob);

                                for(a=0; a<8; a++) {
                                        mul_m4_v3(ob->obmat, bb.vec[a]);
                                        DO_MINMAX(bb.vec[a], min, max);
                                }
                                change= TRUE;
                        }
                }
                break;
        }

        if(change == FALSE) {
                DO_MINMAX(ob->obmat[3], min, max);

                copy_v3_v3(vec, ob->obmat[3]);
                add_v3_v3(vec, ob->size);
                DO_MINMAX(vec, min, max);

                copy_v3_v3(vec, ob->obmat[3]);
                sub_v3_v3(vec, ob->size);
                DO_MINMAX(vec, min, max);
        }
}

int minmax_object_duplis(Scene *scene, Object *ob, float *min, float *max)
{
        int ok= 0;
        if ((ob->transflag & OB_DUPLI)==0) {
                return ok;
        } else {
                ListBase *lb;
                DupliObject *dob;
                
                lb= object_duplilist(scene, ob);
                for(dob= lb->first; dob; dob= dob->next) {
                        if(dob->no_draw == 0) {
                                BoundBox *bb= object_get_boundbox(dob->ob);

                                if(bb) {
                                        int i;
                                        for(i=0; i<8; i++) {
                                                float vec[3];
                                                mul_v3_m4v3(vec, dob->mat, bb->vec[i]);
                                                DO_MINMAX(vec, min, max);
                                        }

                                        ok= 1;
                                }
                        }
                }
                free_object_duplilist(lb);      /* does restore */
        }

        return ok;
}

/* copied from DNA_object_types.h */
typedef struct ObTfmBack {
        float loc[3], dloc[3], orig[3];
        float size[3], dsize[3];        /* scale and delta scale */
        float rot[3], drot[3];          /* euler rotation */
        float quat[4], dquat[4];        /* quaternion rotation */
        float rotAxis[3], drotAxis[3];  /* axis angle rotation - axis part */
        float rotAngle, drotAngle;      /* axis angle rotation - angle part */
        float obmat[4][4];              /* final worldspace matrix with constraints & animsys applied */
        float parentinv[4][4]; /* inverse result of parent, so that object doesn't 'stick' to parent */
        float constinv[4][4]; /* inverse result of constraints. doesn't include effect of parent or object local transform */
        float imat[4][4];       /* inverse matrix of 'obmat' for during render, old game engine, temporally: ipokeys of transform  */
} ObTfmBack;

void *object_tfm_backup(Object *ob)
{
        ObTfmBack *obtfm= MEM_mallocN(sizeof(ObTfmBack), "ObTfmBack");
        copy_v3_v3(obtfm->loc, ob->loc);
        copy_v3_v3(obtfm->dloc, ob->dloc);
        copy_v3_v3(obtfm->orig, ob->orig);
        copy_v3_v3(obtfm->size, ob->size);
        copy_v3_v3(obtfm->dsize, ob->dsize);
        copy_v3_v3(obtfm->rot, ob->rot);
        copy_v3_v3(obtfm->drot, ob->drot);
        copy_qt_qt(obtfm->quat, ob->quat);
        copy_qt_qt(obtfm->dquat, ob->dquat);
        copy_v3_v3(obtfm->rotAxis, ob->rotAxis);
        copy_v3_v3(obtfm->drotAxis, ob->drotAxis);
        obtfm->rotAngle= ob->rotAngle;
        obtfm->drotAngle= ob->drotAngle;
        copy_m4_m4(obtfm->obmat, ob->obmat);
        copy_m4_m4(obtfm->parentinv, ob->parentinv);
        copy_m4_m4(obtfm->constinv, ob->constinv);
        copy_m4_m4(obtfm->imat, ob->imat);

        return (void *)obtfm;
}

void object_tfm_restore(Object *ob, void *obtfm_pt)
{
        ObTfmBack *obtfm= (ObTfmBack *)obtfm_pt;
        copy_v3_v3(ob->loc, obtfm->loc);
        copy_v3_v3(ob->dloc, obtfm->dloc);
        copy_v3_v3(ob->orig, obtfm->orig);
        copy_v3_v3(ob->size, obtfm->size);
        copy_v3_v3(ob->dsize, obtfm->dsize);
        copy_v3_v3(ob->rot, obtfm->rot);
        copy_v3_v3(ob->drot, obtfm->drot);
        copy_qt_qt(ob->quat, obtfm->quat);
        copy_qt_qt(ob->dquat, obtfm->dquat);
        copy_v3_v3(ob->rotAxis, obtfm->rotAxis);
        copy_v3_v3(ob->drotAxis, obtfm->drotAxis);
        ob->rotAngle= obtfm->rotAngle;
        ob->drotAngle= obtfm->drotAngle;
        copy_m4_m4(ob->obmat, obtfm->obmat);
        copy_m4_m4(ob->parentinv, obtfm->parentinv);
        copy_m4_m4(ob->constinv, obtfm->constinv);
        copy_m4_m4(ob->imat, obtfm->imat);
}

/* proxy rule: lib_object->proxy_from == the one we borrow from, only set temporal and cleared here */
/*           local_object->proxy      == pointer to library object, saved in files and read */

/* function below is polluted with proxy exceptions, cleanup will follow! */

/* the main object update call, for object matrix, constraints, keys and displist (modifiers) */
/* requires flags to be set! */
void object_handle_update(Scene *scene, Object *ob)
{
        if(ob->recalc & OB_RECALC_ALL) {
                /* speed optimization for animation lookups */
                if(ob->pose)
                        make_pose_channels_hash(ob->pose);

                if(ob->recalc & OB_RECALC_DATA) {
                        if(ob->type==OB_ARMATURE) {
                                /* this happens for reading old files and to match library armatures
                                   with poses we do it ahead of where_is_object to ensure animation
                                   is evaluated on the rebuilt pose, otherwise we get incorrect poses
                                   on file load */
                                if(ob->pose==NULL || (ob->pose->flag & POSE_RECALC))
                                        armature_rebuild_pose(ob, ob->data);
                        }
                }

                /* XXX new animsys warning: depsgraph tag OB_RECALC_DATA should not skip drivers, 
                   which is only in where_is_object now */
                // XXX: should this case be OB_RECALC_OB instead?
                if(ob->recalc & OB_RECALC_ALL) {
                        
                        if (G.f & G_DEBUG)
                                printf("recalcob %s\n", ob->id.name+2);
                        
                        /* handle proxy copy for target */
                        if(ob->id.lib && ob->proxy_from) {
                                // printf("ob proxy copy, lib ob %s proxy %s\n", ob->id.name, ob->proxy_from->id.name);
                                if(ob->proxy_from->proxy_group) {/* transform proxy into group space */
                                        Object *obg= ob->proxy_from->proxy_group;
                                        invert_m4_m4(obg->imat, obg->obmat);
                                        mul_m4_m4m4(ob->obmat, ob->proxy_from->obmat, obg->imat);
                                        if(obg->dup_group) { /* should always be true */
                                                add_v3_v3(ob->obmat[3], obg->dup_group->dupli_ofs);
                                        }
                                }
                                else
                                        copy_m4_m4(ob->obmat, ob->proxy_from->obmat);
                        }
                        else
                                where_is_object(scene, ob);
                }
                
                if(ob->recalc & OB_RECALC_DATA) {
                        ID *data_id= (ID *)ob->data;
                        AnimData *adt= BKE_animdata_from_id(data_id);
                        float ctime= (float)scene->r.cfra; // XXX this is bad...
                        ListBase pidlist;
                        PTCacheID *pid;
                        
                        if (G.f & G_DEBUG)
                                printf("recalcdata %s\n", ob->id.name+2);

                        if(adt) {
                                /* evaluate drivers */
                                // XXX: for mesh types, should we push this to derivedmesh instead?
                                BKE_animsys_evaluate_animdata(data_id, adt, ctime, ADT_RECALC_DRIVERS);
                        }

                        /* includes all keys and modifiers */
                        switch(ob->type) {
                        case OB_MESH:
                                {
#if 0                           // XXX, comment for 2.56a release, background wont set 'scene->customdata_mask'
                                        EditMesh *em = (ob == scene->obedit)? BKE_mesh_get_editmesh(ob->data): NULL;
                                        BLI_assert((scene->customdata_mask & CD_MASK_BAREMESH) == CD_MASK_BAREMESH);
                                        if(em) {
                                                makeDerivedMesh(scene, ob, em,  scene->customdata_mask); /* was CD_MASK_BAREMESH */
                                                BKE_mesh_end_editmesh(ob->data, em);
                                        } else
                                                makeDerivedMesh(scene, ob, NULL, scene->customdata_mask);

#else                           /* ensure CD_MASK_BAREMESH for now */
                                        EditMesh *em = (ob == scene->obedit)? BKE_mesh_get_editmesh(ob->data): NULL;
                                        unsigned int data_mask= scene->customdata_mask | ob->customdata_mask | CD_MASK_BAREMESH;
                                        if(em) {
                                                makeDerivedMesh(scene, ob, em,  data_mask); /* was CD_MASK_BAREMESH */
                                                BKE_mesh_end_editmesh(ob->data, em);
                                        } else
                                                makeDerivedMesh(scene, ob, NULL, data_mask);
#endif

                                }
                                break;

                        case OB_ARMATURE:
                                if(ob->id.lib && ob->proxy_from) {
                                        // printf("pose proxy copy, lib ob %s proxy %s\n", ob->id.name, ob->proxy_from->id.name);
                                        copy_pose_result(ob->pose, ob->proxy_from->pose);
                                }
                                else {
                                        where_is_pose(scene, ob);
                                }
                                break;

                        case OB_MBALL:
                                makeDispListMBall(scene, ob);
                                break;

                        case OB_CURVE:
                        case OB_SURF:
                        case OB_FONT:
                                makeDispListCurveTypes(scene, ob, 0);
                                break;
                                
                        case OB_LATTICE:
                                lattice_calc_modifiers(scene, ob);
                                break;
                        }


                        if(ob->particlesystem.first) {
                                ParticleSystem *tpsys, *psys;
                                DerivedMesh *dm;
                                ob->transflag &= ~OB_DUPLIPARTS;
                                
                                psys= ob->particlesystem.first;
                                while(psys) {
                                        if(psys_check_enabled(ob, psys)) {
                                                /* check use of dupli objects here */
                                                if(psys->part && (psys->part->draw_as == PART_DRAW_REND || G.rendering) &&
                                                        ((psys->part->ren_as == PART_DRAW_OB && psys->part->dup_ob)
                                                        || (psys->part->ren_as == PART_DRAW_GR && psys->part->dup_group)))
                                                        ob->transflag |= OB_DUPLIPARTS;

                                                particle_system_update(scene, ob, psys);
                                                psys= psys->next;
                                        }
                                        else if(psys->flag & PSYS_DELETE) {
                                                tpsys=psys->next;
                                                BLI_remlink(&ob->particlesystem, psys);
                                                psys_free(ob,psys);
                                                psys= tpsys;
                                        }
                                        else
                                                psys= psys->next;
                                }

                                if(G.rendering && ob->transflag & OB_DUPLIPARTS) {
                                        /* this is to make sure we get render level duplis in groups:
                                         * the derivedmesh must be created before init_render_mesh,
                                         * since object_duplilist does dupliparticles before that */
                                        dm = mesh_create_derived_render(scene, ob, CD_MASK_BAREMESH|CD_MASK_MTFACE|CD_MASK_MCOL);
                                        dm->release(dm);

                                        for(psys=ob->particlesystem.first; psys; psys=psys->next)
                                                psys_get_modifier(ob, psys)->flag &= ~eParticleSystemFlag_psys_updated;
                                }
                        }

                        /* check if quick cache is needed */
                        BKE_ptcache_ids_from_object(&pidlist, ob, scene, MAX_DUPLI_RECUR);

                        for(pid=pidlist.first; pid; pid=pid->next) {
                                if((pid->cache->flag & PTCACHE_BAKED)
                                        || (pid->cache->flag & PTCACHE_QUICK_CACHE)==0)
                                        continue;

                                if(pid->cache->flag & PTCACHE_OUTDATED || (pid->cache->flag & PTCACHE_SIMULATION_VALID)==0) {
                                        scene->physics_settings.quick_cache_step =
                                                scene->physics_settings.quick_cache_step ?
                                                MIN2(scene->physics_settings.quick_cache_step, pid->cache->step) :
                                                pid->cache->step;
                                }
                        }

                        BLI_freelistN(&pidlist);
                }

                /* the no-group proxy case, we call update */
                if(ob->proxy && ob->proxy_group==NULL) {
                        /* set pointer in library proxy target, for copying, but restore it */
                        ob->proxy->proxy_from= ob;
                        // printf("call update, lib ob %s proxy %s\n", ob->proxy->id.name, ob->id.name);
                        object_handle_update(scene, ob->proxy);
                }
        
                ob->recalc &= ~OB_RECALC_ALL;
        }

        /* the case when this is a group proxy, object_update is called in group.c */
        if(ob->proxy) {
                ob->proxy->proxy_from= ob;
                // printf("set proxy pointer for later group stuff %s\n", ob->id.name);
        }
}

float give_timeoffset(Object *ob) {
        if ((ob->ipoflag & OB_OFFS_PARENTADD) && ob->parent) {
                return ob->sf + give_timeoffset(ob->parent);
        } else {
                return ob->sf;
        }
}

int give_obdata_texspace(Object *ob, short **texflag, float **loc, float **size, float **rot) {
        
        if (ob->data==NULL)
                return 0;
        
        switch (GS(((ID *)ob->data)->name)) {
        case ID_ME:
        {
                Mesh *me= ob->data;
                if (texflag)    *texflag = &me->texflag;
                if (loc)                *loc = me->loc;
                if (size)               *size = me->size;
                if (rot)                *rot = me->rot;
                break;
        }
        case ID_CU:
        {
                Curve *cu= ob->data;
                if (texflag)    *texflag = &cu->texflag;
                if (loc)                *loc = cu->loc;
                if (size)               *size = cu->size;
                if (rot)                *rot = cu->rot;
                break;
        }
        case ID_MB:
        {
                MetaBall *mb= ob->data;
                if (texflag)    *texflag = &mb->texflag;
                if (loc)                *loc = mb->loc;
                if (size)               *size = mb->size;
                if (rot)                *rot = mb->rot;
                break;
        }
        default:
                return 0;
        }
        return 1;
}

/*
 * Test a bounding box for ray intersection
 * assumes the ray is already local to the boundbox space
 */
int ray_hit_boundbox(struct BoundBox *bb, float ray_start[3], float ray_normal[3])
{
        static int triangle_indexes[12][3] = {{0, 1, 2}, {0, 2, 3},
                                                                                  {3, 2, 6}, {3, 6, 7},
                                                                                  {1, 2, 6}, {1, 6, 5}, 
                                                                                  {5, 6, 7}, {4, 5, 7},
                                                                                  {0, 3, 7}, {0, 4, 7},
                                                                                  {0, 1, 5}, {0, 4, 5}};
        int result = 0;
        int i;
        
        for (i = 0; i < 12 && result == 0; i++)
        {
                float lambda;
                int v1, v2, v3;
                v1 = triangle_indexes[i][0];
                v2 = triangle_indexes[i][1];
                v3 = triangle_indexes[i][2];
                result = isect_ray_tri_v3(ray_start, ray_normal, bb->vec[v1], bb->vec[v2], bb->vec[v3], &lambda, NULL);
        }
        
        return result;
}

static int pc_cmp(void *a, void *b)
{
        LinkData *ad = a, *bd = b;
        if(GET_INT_FROM_POINTER(ad->data) > GET_INT_FROM_POINTER(bd->data))
                return 1;
        else return 0;
}

int object_insert_ptcache(Object *ob) 
{
        LinkData *link = NULL;
        int i = 0;

        BLI_sortlist(&ob->pc_ids, pc_cmp);

        for(link=ob->pc_ids.first, i = 0; link; link=link->next, i++) 
        {
                int index = GET_INT_FROM_POINTER(link->data);

                if(i < index)
                        break;
        }

        link = MEM_callocN(sizeof(LinkData), "PCLink");
        link->data = SET_INT_IN_POINTER(i);
        BLI_addtail(&ob->pc_ids, link);

        return i;
}

void object_camera_mode(RenderData *rd, Object *camera)
{
        rd->mode &= ~(R_ORTHO|R_PANORAMA);
        if(camera && camera->type==OB_CAMERA) {
                Camera *cam= camera->data;
                if(cam->type == CAM_ORTHO) rd->mode |= R_ORTHO;
                if(cam->flag & CAM_PANORAMA) rd->mode |= R_PANORAMA;
        }
}

/* 'lens' may be set for envmap only */
void object_camera_matrix(
                RenderData *rd, Object *camera, int winx, int winy, short field_second,
                float winmat[][4], rctf *viewplane, float *clipsta, float *clipend, float *lens, float *ycor,
                float *viewdx, float *viewdy
) {
        Camera *cam=NULL;
        float pixsize;
        float shiftx=0.0, shifty=0.0, winside, viewfac;
        short is_ortho= FALSE;

        /* question mark */
        (*ycor)= rd->yasp / rd->xasp;
        if(rd->mode & R_FIELDS)
                (*ycor) *= 2.0f;

        if(camera->type==OB_CAMERA) {
                cam= camera->data;

                if(cam->type == CAM_ORTHO) {
                        is_ortho= TRUE;
                }

                /* solve this too... all time depending stuff is in convertblender.c?
                 * Need to update the camera early because it's used for projection matrices
                 * and other stuff BEFORE the animation update loop is done
                 * */
#if 0 // XXX old animation system
                if(cam->ipo) {
                        calc_ipo(cam->ipo, frame_to_float(re->scene, re->r.cfra));
                        execute_ipo(&cam->id, cam->ipo);
                }
#endif // XXX old animation system
                shiftx=cam->shiftx;
                shifty=cam->shifty;
                (*lens)= cam->lens;
                (*clipsta)= cam->clipsta;
                (*clipend)= cam->clipend;
        }
        else if(camera->type==OB_LAMP) {
                Lamp *la= camera->data;
                float fac= cosf((float)M_PI*la->spotsize/360.0f);
                float phi= acos(fac);

                (*lens)= 16.0f*fac/sinf(phi);
                if((*lens)==0.0f)
                        (*lens)= 35.0f;
                (*clipsta)= la->clipsta;
                (*clipend)= la->clipend;
        }
        else {  /* envmap exception... */;
                if((*lens)==0.0f)
                        (*lens)= 16.0f;

                if((*clipsta)==0.0f || (*clipend)==0.0f) {
                        (*clipsta)= 0.1f;
                        (*clipend)= 1000.0f;
                }
        }

        /* ortho only with camera available */
        if(cam && is_ortho) {
                if(rd->xasp*winx >= rd->yasp*winy) {
                        viewfac= winx;
                }
                else {
                        viewfac= (*ycor) * winy;
                }
                /* ortho_scale == 1.0 means exact 1 to 1 mapping */
                pixsize= cam->ortho_scale/viewfac;
        }
        else {
                if(rd->xasp*winx >= rd->yasp*winy)      viewfac= ((*lens) * winx)/32.0f;
                else                                                            viewfac= (*ycor) * ((*lens) * winy)/32.0f;
                pixsize= (*clipsta) / viewfac;
        }

        /* viewplane fully centered, zbuffer fills in jittered between -.5 and +.5 */
        winside= MAX2(winx, winy);
        viewplane->xmin= -0.5f*(float)winx + shiftx*winside;
        viewplane->ymin= -0.5f*(*ycor)*(float)winy + shifty*winside;
        viewplane->xmax=  0.5f*(float)winx + shiftx*winside;
        viewplane->ymax=  0.5f*(*ycor)*(float)winy + shifty*winside;

        if(field_second) {
                if(rd->mode & R_ODDFIELD) {
                        viewplane->ymin-= 0.5f * (*ycor);
                        viewplane->ymax-= 0.5f * (*ycor);
                }
                else {
                        viewplane->ymin+= 0.5f * (*ycor);
                        viewplane->ymax+= 0.5f * (*ycor);
                }
        }
        /* the window matrix is used for clipping, and not changed during OSA steps */
        /* using an offset of +0.5 here would give clip errors on edges */
        viewplane->xmin *= pixsize;
        viewplane->xmax *= pixsize;
        viewplane->ymin *= pixsize;
        viewplane->ymax *= pixsize;

        (*viewdx)= pixsize;
        (*viewdy)= (*ycor) * pixsize;

        if(is_ortho)
                orthographic_m4(winmat, viewplane->xmin, viewplane->xmax, viewplane->ymin, viewplane->ymax, *clipsta, *clipend);
        else
                perspective_m4(winmat, viewplane->xmin, viewplane->xmax, viewplane->ymin, viewplane->ymax, *clipsta, *clipend);

}

#if 0
static int pc_findindex(ListBase *listbase, int index)
{
        LinkData *link= NULL;
        int number= 0;
        
        if (listbase == NULL) return -1;
        
        link= listbase->first;
        while (link) {
                if ((int)link->data == index)
                        return number;
                
                number++;
                link= link->next;
        }
        
        return -1;
}

void object_delete_ptcache(Object *ob, int index) 
{
        int list_index = pc_findindex(&ob->pc_ids, index);
        LinkData *link = BLI_findlink(&ob->pc_ids, list_index);
        BLI_freelinkN(&ob->pc_ids, link);
}
#endif

/* shape key utility function */

/************************* Mesh ************************/
static KeyBlock *insert_meshkey(Scene *scene, Object *ob, const char *name, int from_mix)
{
        Mesh *me= ob->data;
        Key *key= me->key;
        KeyBlock *kb;
        int newkey= 0;

        if(key == NULL) {
                key= me->key= add_key((ID *)me);
                key->type= KEY_RELATIVE;
                newkey= 1;
        }

        if(newkey || from_mix==FALSE) {
                /* create from mesh */
                kb= add_keyblock(key, name);
                mesh_to_key(me, kb);
        }
        else {
                /* copy from current values */
                float *data= do_ob_key(scene, ob);

                /* create new block with prepared data */
                kb= add_keyblock(key, name);
                kb->data= data;
                kb->totelem= me->totvert;
        }

        return kb;
}
/************************* Lattice ************************/
static KeyBlock *insert_lattkey(Scene *scene, Object *ob, const char *name, int from_mix)
{
        Lattice *lt= ob->data;
        Key *key= lt->key;
        KeyBlock *kb;
        int newkey= 0;

        if(key==NULL) {
                key= lt->key= add_key( (ID *)lt);
                key->type= KEY_RELATIVE;
                newkey= 1;
        }

        if(newkey || from_mix==FALSE) {
                kb= add_keyblock(key, name);
                if (!newkey) {
                        KeyBlock *basekb= (KeyBlock *)key->block.first;
                        kb->data= MEM_dupallocN(basekb->data);
                        kb->totelem= basekb->totelem;
                }
                else {
                        latt_to_key(lt, kb);
                }
        }
        else {
                /* copy from current values */
                float *data= do_ob_key(scene, ob);

                /* create new block with prepared data */
                kb= add_keyblock(key, name);
                kb->totelem= lt->pntsu*lt->pntsv*lt->pntsw;
                kb->data= data;
        }

        return kb;
}
/************************* Curve ************************/
static KeyBlock *insert_curvekey(Scene *scene, Object *ob, const char *name, int from_mix)
{
        Curve *cu= ob->data;
        Key *key= cu->key;
        KeyBlock *kb;
        ListBase *lb= BKE_curve_nurbs(cu);
        int newkey= 0;

        if(key==NULL) {
                key= cu->key= add_key( (ID *)cu);
                key->type = KEY_RELATIVE;
                newkey= 1;
        }

        if(newkey || from_mix==FALSE) {
                /* create from curve */
                kb= add_keyblock(key, name);
                if (!newkey) {
                        KeyBlock *basekb= (KeyBlock *)key->block.first;
                        kb->data= MEM_dupallocN(basekb->data);
                        kb->totelem= basekb->totelem;
                }
                else {
                        curve_to_key(cu, kb, lb);
                }
        }
        else {
                /* copy from current values */
                float *data= do_ob_key(scene, ob);

                /* create new block with prepared data */
                kb= add_keyblock(key, name);
                kb->totelem= count_curveverts(lb);
                kb->data= data;
        }

        return kb;
}

KeyBlock *object_insert_shape_key(Scene *scene, Object *ob, const char *name, int from_mix)
{
        if(ob->type==OB_MESH)                                    return insert_meshkey(scene, ob, name, from_mix);
        else if ELEM(ob->type, OB_CURVE, OB_SURF)return insert_curvekey(scene, ob, name, from_mix);
        else if(ob->type==OB_LATTICE)                    return insert_lattkey(scene, ob, name, from_mix);
        else                                                                     return NULL;
}

/* most important if this is modified it should _always_ return True, in certain
 * cases false positives are hard to avoid (shape keys for eg)
 */
int object_is_modified(Scene *scene, Object *ob)
{
        int flag= 0;

        if(ob_get_key(ob)) {
                flag |= eModifierMode_Render | eModifierMode_Render;
        }
        else {
                ModifierData *md;
                /* cloth */
                for(md=modifiers_getVirtualModifierList(ob); md && (flag != (eModifierMode_Render | eModifierMode_Realtime)); md=md->next) {
                        if((flag & eModifierMode_Render) == 0   && modifier_isEnabled(scene, md, eModifierMode_Render))         flag |= eModifierMode_Render;
                        if((flag & eModifierMode_Realtime) == 0 && modifier_isEnabled(scene, md, eModifierMode_Realtime))       flag |= eModifierMode_Realtime;
                }
        }

        return flag;
}

static void copy_object__forwardModifierLinks(void *UNUSED(userData), Object *UNUSED(ob), ID **idpoin)
{
        /* this is copied from ID_NEW; it might be better to have a macro */
        if(*idpoin && (*idpoin)->newid) *idpoin = (*idpoin)->newid;
}

void object_relink(Object *ob)
{
        if(ob->id.lib)
                return;

        relink_constraints(&ob->constraints);
        if (ob->pose){
                bPoseChannel *chan;
                for (chan = ob->pose->chanbase.first; chan; chan=chan->next){
                        relink_constraints(&chan->constraints);
                }
        }
        modifiers_foreachIDLink(ob, copy_object__forwardModifierLinks, NULL);

        if(ob->adt)
                BKE_relink_animdata(ob->adt);

        ID_NEW(ob->parent);

        ID_NEW(ob->proxy);
        ID_NEW(ob->proxy_group);
}