object.c

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

#include <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_lattice_types.h"
#include "DNA_material_types.h"
#include "DNA_meta_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_movieclip_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
#include "DNA_sequence_types.h"
#include "DNA_smoke_types.h"
#include "DNA_sound_types.h"
#include "DNA_space_types.h"
#include "DNA_view3d_types.h"
#include "DNA_world_types.h"

#include "BLI_blenlib.h"
#include "BLI_bpath.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_lamp.h"
#include "BKE_lattice.h"
#include "BKE_library.h"
#include "BKE_mesh.h"
#include "BKE_mball.h"
#include "BKE_modifier.h"
#include "BKE_node.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_speaker.h"
#include "BKE_softbody.h"
#include "BKE_material.h"
#include "BKE_camera.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->dscale[0]= workob->dscale[1]= workob->dscale[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_deformMats(SculptSession *ss)
{
    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);

    ss->orig_cos = NULL;
    ss->deform_cos = NULL;
    ss->deform_imats = NULL;
}

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->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;
                                ct->subtarget[0]= '\0';
                                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;
                        ct->subtarget[0]= '\0';
                        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;
    }
    
    /* 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;
}

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

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_SPEAKER: return add_speaker("Speaker");
    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_SPEAKER: return "Speaker";
    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;
    ob->dscale[0]= ob->dscale[1]= ob->dscale[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 || type==OB_SPEAKER) {
        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.;
    ob->obstacleRad = 1.;
    
    /* NT fluid sim defaults */
    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[MAX_ID_NAME];

    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)
{
    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) {
                ParticleSystemModifierData *psmd= (ParticleSystemModifierData*)md;
                if(psmd->psys==psys)
                    psmd->psys= npsys;
            }
            else if(md->type==eModifierType_DynamicPaint) {
                DynamicPaintModifierData *pmd= (DynamicPaintModifierData*)md;
                if (pmd->brush) {
                    if(pmd->brush->psys==psys) {
                        pmd->brush->psys= npsys;
                    }
                }
            }
            else if (md->type==eModifierType_Smoke) {
                SmokeModifierData *smd = (SmokeModifierData*) md;
                
                if(smd->type==MOD_SMOKE_TYPE_FLOW) {
                    if (smd->flow) {
                        if (smd->flow->psys == psys)
                            smd->flow->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 (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 int object_pose_context(Object *ob)
{
    if( (ob) &&
        (ob->type == OB_ARMATURE) &&
        (ob->pose) &&
        (ob->mode & OB_MODE_POSE)
    ) {
        return 1;
    }
    else {
        return 0;
    }
}

Object *object_pose_armature_get(Object *ob)
{
    if(ob==NULL)
        return NULL;

    if(object_pose_context(ob))
        return ob;

    ob= modifiers_isDeformedByArmature(ob);

    if(object_pose_context(ob))
        return ob;

    return NULL;
}

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->id);
    
    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->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)
{
    ParticleSystem *psys;

    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);

    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 is_local= FALSE, is_lib= FALSE;

    /* - 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) {
        id_clear_lib_data(bmain, &ob->id);
        extern_local_object(ob);
    }
    else {
        for(sce= bmain->scene.first; sce && ELEM(0, is_lib, is_local); sce= sce->id.next) {
            if(object_in_scene(ob, sce)) {
                if(sce->id.lib) is_lib= TRUE;
                else is_local= TRUE;
            }
        }

        if(is_local && is_lib == FALSE) {
            id_clear_lib_data(bmain, &ob->id);
            extern_local_object(ob);
        }
        else if(is_local && is_lib) {
            Object *ob_new= copy_object(ob);

            ob_new->id.us= 0;
            
            /* Remap paths of new ID using old library as base. */
            BKE_id_lib_local_paths(bmain, ob->id.lib, &ob_new->id);

            sce= bmain->scene.first;
            while(sce) {
                if(sce->id.lib==NULL) {
                    base= sce->base.first;
                    while(base) {
                        if(base->object==ob) {
                            base->object= ob_new;
                            ob_new->id.us++;
                            ob->id.us--;
                        }
                        base= base->next;
                    }
                }
                sce= sce->id.next;
            }
        }
    }
}

/*
 * 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;
        mult_m4_m4m4(ob->obmat, gob->obmat, target->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) && OB_TYPE_SUPPORT_MATERIAL(ob->type)) {
        int i;
        
        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 ****************** */

void object_scale_to_mat3(Object *ob, float mat[][3])
{
    float vec[3];
    mul_v3_v3v3(vec, ob->size, ob->dscale);
    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);
        }
    }
}

void object_tfm_protected_backup(const Object *ob,
                                 ObjectTfmProtectedChannels *obtfm)
{

#define TFMCPY(   _v) (obtfm->_v = ob->_v)
#define TFMCPY3D( _v) copy_v3_v3(obtfm->_v, ob->_v)
#define TFMCPY4D( _v) copy_v4_v4(obtfm->_v, ob->_v)

    TFMCPY3D(loc);
    TFMCPY3D(dloc);
    TFMCPY3D(size);
    TFMCPY3D(dscale);
    TFMCPY3D(rot);
    TFMCPY3D(drot);
    TFMCPY4D(quat);
    TFMCPY4D(dquat);
    TFMCPY3D(rotAxis);
    TFMCPY3D(drotAxis);
    TFMCPY(rotAngle);
    TFMCPY(drotAngle);

#undef TFMCPY
#undef TFMCPY3D
#undef TFMCPY4D

}

void object_tfm_protected_restore(Object *ob,
                                  const ObjectTfmProtectedChannels *obtfm,
                                  const short protectflag)
{
    unsigned int i;

    for (i= 0; i < 3; i++) {
        if (protectflag & (OB_LOCK_LOCX<<i)) {
            ob->loc[i]=  obtfm->loc[i];
            ob->dloc[i]= obtfm->dloc[i];
        }

        if (protectflag & (OB_LOCK_SCALEX<<i)) {
            ob->size[i]=  obtfm->size[i];
            ob->dscale[i]= obtfm->dscale[i];
        }

        if (protectflag & (OB_LOCK_ROTX<<i)) {
            ob->rot[i]=  obtfm->rot[i];
            ob->drot[i]= obtfm->drot[i];

            ob->quat[i + 1]=  obtfm->quat[i + 1];
            ob->dquat[i + 1]= obtfm->dquat[i + 1];

            ob->rotAxis[i]=  obtfm->rotAxis[i];
            ob->drotAxis[i]= obtfm->drotAxis[i];
        }
    }

    if ((protectflag & OB_LOCK_ROT4D) && (protectflag & OB_LOCK_ROTW)) {
        ob->quat[0]=  obtfm->quat[0];
        ob->dquat[0]= obtfm->dquat[0];

        ob->rotAngle=  obtfm->rotAngle;
        ob->drotAngle= obtfm->drotAngle;
    }
}

/* 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];
        mult_m4_m4m4(diff_mat, ob->parent->obmat, ob->parentinv);
        invert_m4_m4(imat, diff_mat);
        mult_m4_m4m4(rmat, imat, mat); /* 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);

    if (ob->dscale[0] != 0.0f) ob->size[0] /= ob->dscale[0];
    if (ob->dscale[1] != 0.0f) ob->size[1] /= ob->dscale[1];
    if (ob->dscale[2] != 0.0f) ob->size[2] /= ob->dscale[2];

    /* 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;
    
    /* 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;
        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);
            mult_m4_m4m4(rmat, tmat, mat);
            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);
            }
        }
        else fprintf(stderr, "%s: DerivedMesh is needed to solve parenting, object position can be wrong now\n", __func__);

        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;
                        copy_v3_v3(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) {
            copy_v3_v3(mat[3], v1);
        }
        else {
            add_v3_v3v3(mat[3], v1, v2);
            add_v3_v3(mat[3], v3);
            mul_v3_fl(mat[3], 0.3333333f);
        }
    }
}

static int where_is_object_parslow(Object *ob, float obmat[4][4], float slowmat[4][4])
{
    float *fp1, *fp2;
    float fac1, fac2;
    int a;

    // include framerate
    fac1= ( 1.0f / (1.0f + fabsf(ob->sf)) );
    if(fac1 >= 1.0f) return 0;
    fac2= 1.0f-fac1;

    fp1= obmat[0];
    fp2= slowmat[0];
    for(a=0; a<16; a++, fp1++, fp2++) {
        fp1[0]= fac1*fp1[0] + fac2*fp2[0];
    }

    return 1;
}

void where_is_object_time(Scene *scene, Object *ob, float ctime)
{
    float slowmat[4][4] = MAT4_UNITY;
    float stime=ctime;
    
    /* 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(scene, &ob->id, ob->adt, ctime, ADT_RECALC_DRIVERS);
    
    if(ob->parent) {
        Object *par= ob->parent;
        
        /* 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(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);
        
        /* "slow parent" is definitely not threadsafe, and may also give bad results jumping around 
         * An old-fashioned hack which probably doesn't really cut it anymore
         */
        if(ob->partype & PARSLOW) {
            if(!where_is_object_parslow(ob, ob->obmat, slowmat))
                return;
        }
    }
    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;
}

/* get object transformation matrix without recalculating dependencies and
   constraints -- assume dependencies are already solved by depsgraph.
   no changes to object and it's parent would be done.
   used for bundles orientation in 3d space relative to parented blender camera */
void where_is_object_mat(Scene *scene, Object *ob, float obmat[4][4])
{
    float slowmat[4][4] = MAT4_UNITY;

    if(ob->parent) {
        Object *par= ob->parent;

        solve_parenting(scene, ob, par, obmat, slowmat, 1);

        if(ob->partype & PARSLOW)
            where_is_object_parslow(ob, obmat, slowmat);
    }
    else {
        object_to_mat4(ob, obmat);
    }
}

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){
            copy_v3_v3(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 ) {
            copy_v3_v3(ob->orig, par->obmat[3]);
        }
        else {
            copy_v3_v3(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;
    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(ob->sf)));
            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), "OB-BoundBox");
    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[3], float max[3])
{
    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;
}

void BKE_object_foreach_display_point(
        Object *ob, float obmat[4][4],
        void (*func_cb)(const float[3], void *), void *user_data)
{
    float co[3];

    if (ob->derivedFinal) {
        DerivedMesh *dm= ob->derivedFinal;
        MVert *mv= dm->getVertArray(dm);
        int totvert= dm->getNumVerts(dm);
        int i;

        for (i= 0; i < totvert; i++, mv++) {
            mul_v3_m4v3(co, obmat, mv->co);
            func_cb(co, user_data);
        }
    }
    else if (ob->disp.first) {
        DispList *dl;

        for (dl=ob->disp.first; dl; dl=dl->next) {
            float *v3= dl->verts;
            int totvert= dl->nr;
            int i;

            for (i= 0; i < totvert; i++, v3+=3) {
                mul_v3_m4v3(co, obmat, v3);
                func_cb(co, user_data);
            }
        }
    }
}

void BKE_scene_foreach_display_point(
        Scene *scene, View3D *v3d, const short flag,
        void (*func_cb)(const float[3], void *), void *user_data)
{
    Base *base;
    Object *ob;

    for(base= FIRSTBASE; base; base = base->next) {
        if(BASE_VISIBLE(v3d, base) && (base->flag & flag) == flag) {
            ob= base->object;

            if ((ob->transflag & OB_DUPLI)==0) {
                BKE_object_foreach_display_point(ob, ob->obmat, func_cb, user_data);
            }
            else {
                ListBase *lb;
                DupliObject *dob;

                lb= object_duplilist(scene, ob);
                for(dob= lb->first; dob; dob= dob->next) {
                    if(dob->no_draw == 0) {
                        BKE_object_foreach_display_point(dob->ob, dob->mat, func_cb, user_data);
                    }
                }
                free_object_duplilist(lb);  /* does restore */
            }
        }
    }
}

/* copied from DNA_object_types.h */
typedef struct ObTfmBack {
    float loc[3], dloc[3], orig[3];
    float size[3], dscale[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->dscale, ob->dscale);
    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->dscale, obtfm->dscale);
    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);
}

int BKE_object_parent_loop_check(const Object *par, const Object *ob)
{
    /* test if 'ob' is a parent somewhere in par's parents */
    if(par == NULL) return 0;
    if(ob == par) return 1;
    return BKE_object_parent_loop_check(par->parent, ob);
}

/* 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);
                    mult_m4_m4m4(ob->obmat, obg->imat, ob->proxy_from->obmat);
                    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(scene, 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;
                    uint64_t 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);
    }
}

void object_sculpt_modifiers_changed(Object *ob)
{
    SculptSession *ss= ob->sculpt;

    if(!ss->cache) {
        /* we free pbvh on changes, except during sculpt since it can't deal with
           changing PVBH node organization, we hope topology does not change in
           the meantime .. weak */
        if(ss->pbvh) {
                BLI_pbvh_free(ss->pbvh);
                ss->pbvh= NULL;
        }

        free_sculptsession_deformMats(ob->sculpt);
    } else {
        PBVHNode **nodes;
        int n, totnode;

        BLI_pbvh_search_gather(ss->pbvh, NULL, NULL, &nodes, &totnode);

        for(n = 0; n < totnode; n++)
            BLI_pbvh_node_mark_update(nodes[n]);

        MEM_freeN(nodes);
    }
}

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;
}

#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;
    }
    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);
}

MovieClip *object_get_movieclip(Scene *scene, Object *ob, int use_default)
{
    MovieClip *clip= use_default ? scene->clip : NULL;
    bConstraint *con= ob->constraints.first, *scon= NULL;

    while(con){
        if(con->type==CONSTRAINT_TYPE_CAMERASOLVER){
            if(scon==NULL || (scon->flag&CONSTRAINT_OFF))
                scon= con;
        }

        con= con->next;
    }

    if(scon) {
        bCameraSolverConstraint *solver= scon->data;
        if((solver->flag&CAMERASOLVER_ACTIVECLIP)==0)
            clip= solver->clip;
        else
            clip= scene->clip;
    }

    return clip;
}