blender-archive/source/blender/blenkernel/intern/object.c

/* object.c
 *
 * 
 * $Id$
 *
 * ***** BEGIN GPL/BL DUAL 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. The Blender
 * Foundation also sells licenses for use in proprietary software under
 * the Blender License.  See http://www.blender.org/BL/ for information
 * about this.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, 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/BL DUAL LICENSE BLOCK *****
 */

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

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "MEM_guardedalloc.h"

#include "DNA_action_types.h"
#include "DNA_armature_types.h"
#include "DNA_camera_types.h"
#include "DNA_constraint_types.h"
#include "DNA_curve_types.h"
#include "DNA_group_types.h"
#include "DNA_ipo_types.h"
#include "DNA_lamp_types.h"
#include "DNA_lattice_types.h"
#include "DNA_material_types.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_modifier_types.h"
#include "DNA_nla_types.h"
#include "DNA_object_types.h"
#include "DNA_object_force.h"
#include "DNA_object_fluidsim.h"
#include "DNA_oops_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
#include "DNA_space_types.h"
#include "DNA_texture_types.h"
#include "DNA_userdef_types.h"
#include "DNA_view3d_types.h"
#include "DNA_world_types.h"

#include "BKE_armature.h"
#include "BKE_action.h"
#include "BKE_deform.h"
#include "BKE_DerivedMesh.h"
#include "BKE_nla.h"

#include "BLI_blenlib.h"
#include "BLI_arithb.h"
#include "BLI_editVert.h"

#include "BKE_utildefines.h"
#include "BKE_bad_level_calls.h"

#include "BKE_main.h"
#include "BKE_global.h"

#include "BKE_anim.h"
#include "BKE_blender.h"
#include "BKE_constraint.h"
#include "BKE_curve.h"
#include "BKE_displist.h"
#include "BKE_effect.h"
#include "BKE_group.h"
#include "BKE_icons.h"
#include "BKE_ipo.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_property.h"
#include "BKE_sca.h"
#include "BKE_scene.h"
#include "BKE_screen.h"
#include "BKE_softbody.h"

#include "LBM_fluidsim.h"

#include "BPY_extern.h"

/* Local function protos */
static void solve_parenting (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!) */
Object workob;

void clear_workob(void)
{
	memset(&workob, 0, sizeof(Object));
	
	workob.size[0]= workob.size[1]= workob.size[2]= 1.0;
	
}

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

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

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

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

void object_free_modifiers(Object *ob)
{
	while (ob->modifiers.first) {
		ModifierData *md = ob->modifiers.first;

		BLI_remlink(&ob->modifiers, md);

		modifier_free(md);
	}
}

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

/* 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= 0;
	}
	
	for(a=0; a<ob->totcol; a++) {
		if(ob->mat[a]) ob->mat[a]->id.us--;
	}
	if(ob->mat) MEM_freeN(ob->mat);
	ob->mat= 0;
	if(ob->bb) MEM_freeN(ob->bb); 
	ob->bb= 0;
	if(ob->path) free_path(ob->path); 
	ob->path= 0;
	if(ob->ipo) ob->ipo->id.us--;
	if(ob->action) ob->action->id.us--;
	if(ob->dup_group) ob->dup_group->id.us--;
	if(ob->defbase.first)
		BLI_freelistN(&ob->defbase);
	if(ob->pose) {
		free_pose_channels(ob->pose);
		MEM_freeN(ob->pose);
	}
	free_effects(&ob->effect);
	BLI_freelistN(&ob->network);
	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_constraint_channels(&ob->constraintChannels);
	free_nlastrips(&ob->nlastrips);
	
	BPY_free_scriptlink(&ob->scriptlink);
	
	if(ob->pd) MEM_freeN(ob->pd);
	if(ob->soft) sbFree(ob->soft);
	if(ob->fluidsimSettings) fluidsimSettingsFree(ob->fluidsimSettings);
}

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

	if (*obpoin==unlinkOb) {
		*obpoin = NULL;
		ob->recalc |= OB_RECALC;
	}
}
void unlink_object(Object *ob)
{
	Object *obt;
	Material *mat;
	World *wrld;
	bScreen *sc;
	Scene *sce;
	Curve *cu;
	Tex *tex;
	Ipo *ipo;
	Group *group;
	bConstraint *con;
	bActionStrip *strip;
	int a;
	char *str;
	
	unlink_controllers(&ob->controllers);
	unlink_actuators(&ob->actuators);
	
	/* check all objects: parents en bevels and fields */
	obt= G.main->object.first;
	while(obt) {
		if(obt->id.lib) {
			if(obt->proxy==ob)
				obt->proxy= NULL;
		}
		else  {
			
			if(obt->parent==ob) {
				obt->parent= NULL;
				obt->recalc |= OB_RECALC;
			}
			
			if(obt->track==ob) {
				obt->track= NULL;
				obt->recalc |= OB_RECALC_OB;
			}
			
			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;
				}
				if(cu->taperobj==ob) {
					cu->taperobj= NULL;
					obt->recalc |= OB_RECALC;
				}
				if(cu->textoncurve==ob) {
					cu->textoncurve= NULL;
					obt->recalc |= OB_RECALC;
				}
			}
			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) {
						if(ob==get_constraint_target(con, &str)) {
							set_constraint_target(con, NULL, NULL);
							obt->recalc |= OB_RECALC_DATA;
						}
					}
					if(pchan->custom==ob)
						pchan->custom= NULL;
				}
			}
			
			sca_remove_ob_poin(obt, ob);
			
			for (con = obt->constraints.first; con; con=con->next) {
				if(ob==get_constraint_target(con, &str)) {
					set_constraint_target(con, NULL, NULL);
					obt->recalc |= OB_RECALC_OB;
				}
			}
			
			/* object is deflector or field */
			if(ob->pd) {
				if(give_parteff(obt))
					obt->recalc |= OB_RECALC_DATA;
				else if(obt->soft)
					obt->recalc |= OB_RECALC_DATA;
			}
			
			/* strips */
			for(strip= ob->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;
				}
			}
		}
		obt= obt->id.next;
	}
	
	/* materials */
	mat= G.main->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 */
	tex= G.main->tex.first;
	while(tex) {
		if(tex->env) {
			if(tex->env->object == ob) tex->env->object= NULL;
		}
		tex= tex->id.next;
	}
	
	/* mballs */
	if(ob->type==OB_MBALL) {
		obt= find_basis_mball(ob);
		if(obt) freedisplist(&obt->disp);
	}
	
	/* worlds */
	wrld= G.main->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= G.main->scene.first;
	while(sce) {
		if(sce->id.lib==NULL) {
			if(sce->camera==ob) sce->camera= NULL;
		}
		sce= sce->id.next;
	}
	/* ipos */
	ipo= G.main->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;
	}
	
	/* screens */
	sc= G.main->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;

					if(v3d->camera==ob) {
						v3d->camera= NULL;
						if(v3d->persp>1) v3d->persp= 1;
					}
					if(v3d->localvd && v3d->localvd->camera==ob ) {
						v3d->localvd->camera= NULL;
						if(v3d->localvd->persp>1) v3d->localvd->persp= 1;
					}
				}
				else if(sl->spacetype==SPACE_IPO) {
					SpaceIpo *sipo= (SpaceIpo *)sl;
					if(sipo->from == (ID *)ob) sipo->from= NULL;
				}
				else if(sl->spacetype==SPACE_OOPS) {
					SpaceOops *so= (SpaceOops *)sl;
					Oops *oops;

					oops= so->oops.first;
					while(oops) {
						if(oops->id==(ID *)ob) oops->id= NULL;
						oops= oops->next;
					}
					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;
						}
					}
					so->lockpoin= NULL;
				}
			}

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

	/* groups */
	group= G.main->group.first;
	while(group) {
		rem_from_group(group, ob);
		group= group->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()
{
	Camera *cam;
	
	cam=  alloc_libblock(&G.main->camera, ID_CA, "Camera");

	cam->lens= 35.0f;
	cam->clipsta= 0.1f;
	cam->clipend= 100.0f;
	cam->drawsize= 0.5f;
	cam->ortho_scale= 6.0;
	cam->flag |= CAM_SHOWTITLESAFE;
	cam->passepartalpha = 0.2f;
	
	return cam;
}

Camera *copy_camera(Camera *cam)
{
	Camera *camn;
	
	camn= copy_libblock(cam);
	id_us_plus((ID *)camn->ipo);

	BPY_copy_scriptlink(&camn->scriptlink);
	
	return camn;
}



void make_local_camera(Camera *cam)
{
	Object *ob;
	Camera *camn;
	int local=0, lib=0;

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



void *add_lamp(void)
{
	Lamp *la;
	
	la=  alloc_libblock(&G.main->lamp, ID_LA, "Lamp");
	
	la->r= la->g= la->b= la->k= 1.0;
	la->haint= la->energy= 1.0;
	la->dist= 20.0;
	la->spotsize= 45.0;
	la->spotblend= 0.15;
	la->att2= 1.0;
	la->mode= LA_SHAD_BUF;
	la->bufsize= 512;
	la->clipsta= 0.5;
	la->clipend= 40.0;
	la->shadspotsize= 45.0;
	la->samp= 3;
	la->bias= 1.0;
	la->soft= 3.0;
	la->ray_samp= la->ray_sampy= la->ray_sampz= 1; 
	la->area_size=la->area_sizey=la->area_sizez= 1.0; 
	la->buffers= 1;
	la->buftype= LA_SHADBUF_HALFWAY;
	
	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);
		}
	}
	
	id_us_plus((ID *)lan->ipo);

	BPY_copy_scriptlink(&la->scriptlink);
	
	return lan;
}

void make_local_lamp(Lamp *la)
{
	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==0) return;
	if(la->id.us==1) {
		la->id.lib= 0;
		la->id.flag= LIB_LOCAL;
		new_id(0, (ID *)la, 0);
		return;
	}
	
	ob= G.main->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= 0;
		la->id.flag= LIB_LOCAL;
		new_id(0, (ID *)la, 0);
	}
	else if(local && lib) {
		lan= copy_lamp(la);
		lan->id.us= 0;
		
		ob= G.main->object.first;
		while(ob) {
			if(ob->data==la) {
				
				if(ob->id.lib==0) {
					ob->data= lan;
					lan->id.us++;
					la->id.us--;
				}
			}
			ob= ob->id.next;
		}
	}
}

void free_camera(Camera *ca)
{
	BPY_free_scriptlink(&ca->scriptlink);
}

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

	/* scriptlinks */
		
	BPY_free_scriptlink(&la->scriptlink);
	
	for(a=0; a<MAX_MTEX; a++) {
		mtex= la->mtex[a];
		if(mtex && mtex->tex) mtex->tex->id.us--;
		if(mtex) MEM_freeN(mtex);
	}
	la->ipo= 0;

	BKE_icon_delete(&la->id);
	la->id.icon_id = 0;
}

void *add_wave()
{
	return 0;
}


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

static void *add_obdata_from_type(int type)
{
	switch (type) {
	case OB_MESH: G.totmesh++; return add_mesh();
	case OB_CURVE: G.totcurve++; return add_curve(OB_CURVE);
	case OB_SURF: G.totcurve++; return add_curve(OB_SURF);
	case OB_FONT: return add_curve(OB_FONT);
	case OB_MBALL: return add_mball();
	case OB_CAMERA: return add_camera();
	case OB_LAMP: G.totlamp++; return add_lamp();
	case OB_LATTICE: return add_lattice();
	case OB_WAVE: return add_wave();
	case OB_ARMATURE: return add_armature();
	case OB_EMPTY: return NULL;
	default:
		printf("add_obdata_from_type: Internal error, bad type: %d\n", type);
		return NULL;
	}
}

static 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 "Font";
	case OB_MBALL: return "Mball";
	case OB_CAMERA: return "Camera";
	case OB_LAMP: return "Lamp";
	case OB_LATTICE: return "Lattice";
	case OB_WAVE: return "Wave";
	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, char *name)
{
	Object *ob;

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

	/* default object vars */
	ob->type= type;
	/* ob->transflag= OB_QUAT; */

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

	ob->col[0]= ob->col[1]= ob->col[2]= 0.0;
	ob->col[3]= 1.0;

	ob->loc[0]= ob->loc[1]= ob->loc[2]= 0.0;
	ob->rot[0]= ob->rot[1]= ob->rot[2]= 0.0;
	ob->size[0]= ob->size[1]= ob->size[2]= 1.0;

	Mat4One(ob->parentinv);
	Mat4One(ob->obmat);
	ob->dt= OB_SHADED;
	if(U.flag & USER_MAT_ON_OB) ob->colbits= -1;
	ob->empty_drawtype= OB_ARROWS;
	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->ipoflag = OB_OFFS_OB+OB_OFFS_PARENT;
	ob->ipowin= ID_OB;	/* the ipowin shown */
	ob->dupon= 1; ob->dupoff= 0;
	ob->dupsta= 1; ob->dupend= 100;

	/* 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;

	/* NT fluid sim defaults */
	ob->fluidsimFlag = 0;
	ob->fluidsimSettings = NULL;

	return ob;
}

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

	strcpy(name, get_obdata_defname(type));
	ob = add_only_object(type, name);

	ob->data= add_obdata_from_type(type);

	ob->lay= G.scene->lay;

	base= scene_add_base(G.scene, ob);
	scene_select_base(G.scene, base);
	ob->recalc |= OB_RECALC;

	return ob;
}

void base_init_from_view3d(Base *base, View3D *v3d)
{
	Object *ob= base->object;

	if (v3d->localview) {
		base->lay= ob->lay= v3d->layact + v3d->lay;
		VECCOPY(ob->loc, v3d->cursor);
	} else {
		base->lay= ob->lay= v3d->layact;
		VECCOPY(ob->loc, G.scene->cursor);
	}

	v3d->viewquat[0]= -v3d->viewquat[0];
	if (ob->transflag & OB_QUAT) {
		QUATCOPY(ob->quat, v3d->viewquat);
	} else {
		QuatToEul(v3d->viewquat, ob->rot);
	}
	v3d->viewquat[0]= -v3d->viewquat[0];
}

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->ctime= 0.0f;
	
	sbn->keys= NULL;
	sbn->totkey= sbn->totpointkey= 0;
	
	sbn->scratch= NULL;
	return sbn;
}

static void copy_object_pose(Object *obn, Object *ob)
{
	bPoseChannel *chan;
	
	copy_pose(&obn->pose, ob->pose, 1);

	for (chan = obn->pose->chanbase.first; chan; chan=chan->next){
		bConstraint *con;
		char *str;
		chan->flag &= ~(POSE_LOC|POSE_ROT|POSE_SIZE);
		for(con= chan->constraints.first; con; con= con->next) {
			if(ob==get_constraint_target(con, &str))
				set_constraint_target(con, obn, NULL);
		}
	}
}

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

	obn= copy_libblock(ob);
	
	if(ob->totcol) {
		obn->mat= MEM_dupallocN(ob->mat);
	}
	
	if(ob->bb) obn->bb= MEM_dupallocN(ob->bb);
	obn->path= NULL;
	obn->proxy= NULL;
	obn->flag &= ~OB_FROMGROUP;
	
	copy_effects(&obn->effect, &ob->effect);
	obn->modifiers.first = obn->modifiers.last= NULL;
	
	for (md=ob->modifiers.first; md; md=md->next) {
		ModifierData *nmd = modifier_new(md->type);
		modifier_copyData(md, nmd);
		BLI_addtail(&obn->modifiers, nmd);
	}
	
	obn->network.first= obn->network.last= 0;
	
	BPY_copy_scriptlink(&ob->scriptlink);
	
	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);
	}
	copy_defgroups(&obn->defbase, &ob->defbase);
	copy_nlastrips(&obn->nlastrips, &ob->nlastrips);
	copy_constraints (&obn->constraints, &ob->constraints);

	clone_constraint_channels (&obn->constraintChannels, &ob->constraintChannels);

	/* increase user numbers */
	id_us_plus((ID *)obn->data);
	id_us_plus((ID *)obn->ipo);
	id_us_plus((ID *)obn->action);
	id_us_plus((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);
	obn->soft= copy_softbody(ob->soft);

	/* NT copy fluid sim setting memory */
	if(obn->fluidsimSettings) {
		obn->fluidsimSettings = fluidsimSettingsCopy(ob->fluidsimSettings);
		/* copying might fail... */
		if(obn->fluidsimSettings) {
			obn->fluidsimSettings->orgMesh = (Mesh *)obn->data;
		}
	}
	
	obn->derivedDeform = NULL;
	obn->derivedFinal = NULL;

#ifdef WITH_VERSE
	obn->vnode = NULL;
#endif


	return obn;
}

void expand_local_object(Object *ob)
{
	bActionStrip *strip;
	int a;
	
	id_lib_extern((ID *)ob->action);
	id_lib_extern((ID *)ob->ipo);
	id_lib_extern((ID *)ob->data);
	
	for(a=0; a<ob->totcol; a++) {
		id_lib_extern((ID *)ob->mat[a]);
	}
	for (strip=ob->nlastrips.first; strip; strip=strip->next) {
		id_lib_extern((ID *)strip->act);
	}

}

void make_local_object(Object *ob)
{
	Object *obn;
	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;
	if(ob->proxy) return;
	
	if(ob->id.us==1) {
		ob->id.lib= NULL;
		ob->id.flag= LIB_LOCAL;
		new_id(0, (ID *)ob, 0);

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

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

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

void object_make_proxy(Object *ob, Object *target)
{
	/* paranoia checks */
	if(ob->id.lib || target->id.lib==NULL) {
		printf("cannot make proxy\n");
		return;
	}
	
	ob->proxy= target;
	target->proxy= ob;
	
	ob->recalc= target->recalc= OB_RECALC;
	
	/* copy transform */
	VECCOPY(ob->loc, target->loc);
	VECCOPY(ob->rot, target->rot);
	VECCOPY(ob->size, target->size);
	
	ob->parent= target->parent;	/* libdata */
	Mat4CpyMat4(ob->parentinv, target->parentinv);
	ob->ipo= target->ipo;		/* libdata */
	
	/* skip constraints, constraintchannels, nla? */
	
	ob->type= target->type;
	ob->data= target->data;
	id_us_plus((ID *)ob->data);		/* ensures lib data becomes LIB_EXTERN */
	
	/* 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 */
	}
}


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

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

float bluroffs= 0.0f, fieldoffs= 0.0f;
int no_speed_curve= 0;

/* ugly calls from render */
void set_mblur_offs(float blur)
{
	bluroffs= blur;
}

void set_field_offs(float field)
{
	fieldoffs= field;
}

void disable_speed_curve(int val)
{
	no_speed_curve= val;
}

/* ob can be NULL */
float bsystem_time(Object *ob, Object *par, float cfra, float ofs)
{
	/* returns float ( see frame_to_float in ipo.c) */

	cfra+= bluroffs+fieldoffs;

	/* global time */
	cfra*= G.scene->r.framelen;	
	
	if(no_speed_curve==0) if(ob && ob->ipo) cfra= calc_ipo_time(ob->ipo, cfra);
	
	/* ofset frames */
	if(ob && (ob->ipoflag & OB_OFFS_PARENT)) {
		if((ob->partype & PARSLOW)==0) cfra-= ob->sf;
	}
	
	cfra-= ofs;

	return cfra;
}

void object_to_mat3(Object *ob, float mat[][3])	/* no parent */
{
	float smat[3][3], vec[3];
	float rmat[3][3];
	float q1[4];
	
	/* size */
	if(ob->ipo) {
		vec[0]= ob->size[0]+ob->dsize[0];
		vec[1]= ob->size[1]+ob->dsize[1];
		vec[2]= ob->size[2]+ob->dsize[2];
		SizeToMat3(vec, smat);
	}
	else {
		SizeToMat3(ob->size, smat);
	}

	/* rot */
	if(ob->transflag & OB_QUAT) {
		if(ob->ipo) {
			QuatMul(q1, ob->quat, ob->dquat);
			QuatToMat3(q1, rmat);
		}
		else {
			QuatToMat3(ob->quat, rmat);
		}
	}
	else {
		if(ob->ipo) {
			vec[0]= ob->rot[0]+ob->drot[0];
			vec[1]= ob->rot[1]+ob->drot[1];
			vec[2]= ob->rot[2]+ob->drot[2];
			EulToMat3(vec, rmat);
		}
		else {
			EulToMat3(ob->rot, rmat);
		}
	}
	Mat3MulMat3(mat, rmat, smat);
}

void object_to_mat4(Object *ob, float mat[][4])
{
	float tmat[3][3];
	
	object_to_mat3(ob, tmat);
	
	Mat4CpyMat3(mat, tmat);
	
	VECCOPY(mat[3], ob->loc);
	if(ob->ipo) {
		mat[3][0]+= ob->dloc[0];
		mat[3][1]+= ob->dloc[1];
		mat[3][2]+= ob->dloc[2];
	}
}

int enable_cu_speed= 1;

static void ob_parcurve(Object *ob, Object *par, float mat[][4])
{
	Curve *cu;
	float q[4], vec[4], dir[3], *quat, x1, ctime;
	float timeoffs= 0.0;
	
	Mat4One(mat);
	
	cu= par->data;
	if(cu->path==NULL || cu->path->data==NULL) /* only happens on reload file, but violates depsgraph still... fix! */
		makeDispListCurveTypes(par, 0);
	if(cu->path==NULL) return;
	
	/* exception, timeoffset is regarded as distance offset */
	if(cu->flag & CU_OFFS_PATHDIST) {
		SWAP(float, timeoffs, 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= bsystem_time(ob, par, (float)G.scene->r.cfra, 0.0);
		
		if(calc_ipo_spec(cu->ipo, CU_SPEED, &ctime)==0) {
			ctime /= cu->pathlen;
			CLAMP(ctime, 0.0, 1.0);
		}
	}
	else {
		ctime= G.scene->r.cfra - ob->sf;
		ctime /= cu->pathlen;
		
		CLAMP(ctime, 0.0, 1.0);
	}
	
	/* time calculus is correct, now apply distance offset */
	if(cu->flag & CU_OFFS_PATHDIST) {
		ctime += timeoffs/cu->path->totdist;

		/* restore */
		SWAP(float, timeoffs, ob->sf);
	}
	
	
	/* vec: 4 items! */
 	if( where_on_path(par, ctime, vec, dir) ) {

		if(cu->flag & CU_FOLLOW) {
			quat= vectoquat(dir, ob->trackflag, ob->upflag);
			
			/* the tilt */
			Normalise(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];
			QuatMul(quat, q, quat);
			
			QuatToMat4(quat, mat);
		}
		
		VECCOPY(mat[3], vec);
		
	}
}

static void ob_parbone(Object *ob, Object *par, float mat[][4])
{	
	bPoseChannel *pchan;
	bArmature *arm;
	float vec[3];
	
	arm=get_armature(par);
	if (!arm) {
		Mat4One(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);
		Mat4One(mat);
		return;
	}

	/* get bone transform */
	Mat4CpyMat4(mat, pchan->pose_mat);

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

static void give_parvert(Object *par, int nr, float *vec)
{
	int a, count;
	
	vec[0]=vec[1]=vec[2]= 0.0f;
	
	if(par->type==OB_MESH) {
		if(G.obedit && (par->data==G.obedit->data)) {
			EditMesh *em = G.editMesh;
			EditVert *eve;
			
			if(nr >= G.totvert) nr= 0;

			count= 0;
			for(eve= em->verts.first; eve; eve= eve->next, count++) {
				if(count==nr) {
					memcpy(vec, eve->co, 12);
					break;
				}
			}
		}
		else {
			/* maybe this is against the derivedmesh philosphy, but where_is_object is called
			   by code that is called by build_mesh... (when ob->sf!=0.0) so it can cycle eternally */
			DerivedMesh *dm = par->derivedDeform; //mesh_get_derived_deform(par, &needsFree);
			
			if(dm) {
				int tot= dm->getNumVerts(dm);
				if(tot) {
					if(nr >= tot) nr= 0;
					dm->getVertCo(dm, nr, vec);
				}
			}
		}
	}
	else if ELEM(par->type, OB_CURVE, OB_SURF) {
		Nurb *nu;
		Curve *cu;
		BPoint *bp;
		BezTriple *bezt;
		
		cu= par->data;
		nu= cu->nurb.first;
		if(par==G.obedit) nu= editNurb.first;
		
		count= 0;
		while(nu) {
			if((nu->type & 7)==CU_BEZIER) {
				bezt= nu->bezt;
				a= nu->pntsu;
				while(a--) {
					if(count==nr) {
						VECCOPY(vec, bezt->vec[1]);
						break;
					}
					count++;
					bezt++;
				}
			}
			else {
				bp= nu->bp;
				a= nu->pntsu*nu->pntsv;
				while(a--) {
					if(count==nr) {
						memcpy(vec, bp->vec, 12);
						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(par==G.obedit) latt= editLatt;
		
		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 */
	Mat4One(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);
				
		triatoquat(v1, v2, v3, q);
		QuatToMat3(q, cmat);
		Mat4CpyMat3(mat, cmat);
		
		if(ob->type==OB_CURVE) {
			VECCOPY(mat[3], v1);
		}
		else {
			VecAddf(mat[3], v1, v2);
			VecAddf(mat[3], mat[3], v3);
			VecMulf(mat[3], 0.3333333f);
		}
	}
}

static int no_parent_ipo=0;
void set_no_parent_ipo(int val)
{
	no_parent_ipo= val;
}

static int during_script_flag=0;
void disable_where_script(short on)
{
	during_script_flag= on;
}

int during_script(void) {
	return during_script_flag;
}

static int during_scriptlink_flag=0;
void disable_where_scriptlink(short on)
{
	during_scriptlink_flag= on;
}

int during_scriptlink(void) {
	return during_scriptlink_flag;
}

void where_is_object_time(Object *ob, float ctime)
{
	float *fp1, *fp2, slowmat[4][4] = MAT4_UNITY;
	float stime, fac1, fac2, vec[3];
	int a;
	int pop; 
	
	/* 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;
	
	/* this is needed to be able to grab objects with ipos, otherwise it always freezes them */
	stime= bsystem_time(ob, 0, ctime, 0.0);
	if(stime != ob->ctime) {
		
		ob->ctime= stime;
		
		if(ob->ipo) {
			calc_ipo(ob->ipo, stime);
			execute_ipo((ID *)ob, ob->ipo);
		}
		else 
			do_all_object_actions(ob);
		
		/* do constraint ipos ..., note it needs stime */
		do_constraint_channels(&ob->constraints, &ob->constraintChannels, stime);
	}
	else {
		/* but, the drivers have to be done */
		if(ob->ipo) do_ob_ipodrivers(ob, ob->ipo, stime);
	}
	
	if(ob->parent) {
		Object *par= ob->parent;
		
		if(ob->ipoflag & OB_OFFS_PARENT) ctime-= ob->sf;
		
		/* hurms, code below conflicts with depgraph... (ton) */
		/* and even worse, it gives bad effects for NLA stride too (try ctime != par->ctime, with MBlur) */
		pop= 0;
		if(no_parent_ipo==0 && stime != par->ctime) {
		
			// only for ipo systems? 
			pushdata(par, sizeof(Object));
			pop= 1;
			
			if(par->id.lib && par->proxy);	// was a copied matrix, no where_is! bad...
			else where_is_object_time(par, ctime);
		}
		
		solve_parenting(ob, par, ob->obmat, slowmat, 0);

		if(pop) {
			poplast(par);
		}
		
		if(ob->partype & PARSLOW) {
			// include framerate

			fac1= (1.0f/(1.0f+ fabs(ob->sf)));
			if(fac1>=1.0) 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);
	}

	/* Handle tracking */
	if(ob->track) {
		if( ctime != ob->track->ctime) where_is_object_time(ob->track, ctime);
		solve_tracking (ob, ob->track->obmat);
		
	}

	/* constraints need ctime, not stime. it calls where_is_object_time and bsystem_time */
	solve_constraints (ob, TARGET_OBJECT, NULL, ctime);

	if(ob->scriptlink.totscript && !during_script()) {
		if (G.f & G_DOSCRIPTLINKS) BPY_do_pyscript((ID *)ob, SCRIPT_REDRAW);
	}
	
	/* set negative scale flag in object */
	Crossf(vec, ob->obmat[0], ob->obmat[1]);
	if( Inpf(vec, ob->obmat[2]) < 0.0 ) ob->transflag |= OB_NEG_SCALE;
	else ob->transflag &= ~OB_NEG_SCALE;
}

static void solve_parenting (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) Mat4CpyMat4(slowmat, obmat);
	

	switch(ob->partype & PARTYPE) {
	case PAROBJECT:
		ok= 0;
		if(par->type==OB_CURVE) {
			if( ((Curve *)par->data)->flag & CU_PATH ) {
				ob_parcurve(ob, par, tmat);
				ok= 1;
			}
		}
		
		if(ok) Mat4MulSerie(totmat, par->obmat, tmat, 
			NULL, NULL, NULL, NULL, NULL, NULL);
		else Mat4CpyMat4(totmat, par->obmat);
		
		break;
	case PARBONE:
		ob_parbone(ob, par, tmat);
		Mat4MulSerie(totmat, par->obmat, tmat,         
			NULL, NULL, NULL, NULL, NULL, NULL);
		break;
		
	case PARVERT1:
		Mat4One(totmat);
		if (simul){
			VECCOPY(totmat[3], par->obmat[3]);
		}
		else{
			give_parvert(par, ob->par1, vec);
			VecMat4MulVecfl(totmat[3], par->obmat, vec);
		}
		break;
	case PARVERT3:
		ob_parvert3(ob, par, tmat);
		
		Mat4MulSerie(totmat, par->obmat, tmat,         
			NULL, NULL, NULL, NULL, NULL, NULL);
		break;
		
	case PARSKEL:
		Mat4CpyMat4(totmat, par->obmat);
		break;
	}
	
	// total 
	Mat4MulSerie(tmat, totmat, ob->parentinv,         
		NULL, NULL, NULL, NULL, NULL, NULL);
	Mat4MulSerie(obmat, tmat, locmat,         
		NULL, NULL, NULL, NULL, NULL, NULL);
	
	if (simul) {

	}
	else{
		// external usable originmat 
		Mat3CpyMat4(originmat, tmat);
		
		// origin, voor help line
		if( (ob->partype & 15)==PARSKEL ) {
			VECCOPY(ob->orig, par->obmat[3]);
		}
		else {
			VECCOPY(ob->orig, totmat[3]);
		}
	}

}
void solve_tracking (Object *ob, float targetmat[][4])
{
	float *quat;
	float vec[3];
	float totmat[3][3];
	float tmat[4][4];
	
	VecSubf(vec, ob->obmat[3], targetmat[3]);
	quat= vectoquat(vec, ob->trackflag, ob->upflag);
	QuatToMat3(quat, totmat);
	
	if(ob->parent && (ob->transflag & OB_POWERTRACK)) {
		/* 'temporal' : clear parent info */
		object_to_mat4(ob, tmat);
		tmat[0][3]= ob->obmat[0][3];
		tmat[1][3]= ob->obmat[1][3];
		tmat[2][3]= ob->obmat[2][3];
		tmat[3][0]= ob->obmat[3][0];
		tmat[3][1]= ob->obmat[3][1];
		tmat[3][2]= ob->obmat[3][2];
		tmat[3][3]= ob->obmat[3][3];
	}
	else Mat4CpyMat4(tmat, ob->obmat);
	
	Mat4MulMat34(ob->obmat, totmat, tmat);

}

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


void where_is_object_simul(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 */
	
	/* no ipo! (because of dloc and realtime-ipos) */
	ipo= ob->ipo;
	ob->ipo= NULL;

	if(ob->parent) {
		par= ob->parent;
		
		solve_parenting(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);
	}
	
	if(ob->track) 
		solve_tracking(ob, ob->track->obmat);

	solve_constraints(ob, TARGET_OBJECT, NULL, G.scene->r.cfra);
	
	/*  WATCH IT!!! */
	ob->ipo= ipo;
	
}
extern void Mat4BlendMat4(float out[][4], float dst[][4], float src[][4], float srcweight);

void solve_constraints (Object *ob, short obtype, void *obdata, float ctime)
{
	bConstraint *con;
	float tmat[4][4], focusmat[4][4], lastmat[4][4];
	int i, clear=1, tot=0;
	float	a=0;
	float	aquat[4], quat[4];
	float	aloc[3], loc[3];
	float	asize[3], size[3];
	float	oldmat[4][4];
	float	smat[3][3], rmat[3][3], mat[3][3];
	float enf;

	for (con = ob->constraints.first; con; con=con->next) {
		// inverse kinematics is solved seperate 
		if (con->type==CONSTRAINT_TYPE_KINEMATIC) continue;
		// and this we can skip completely
		if (con->flag & CONSTRAINT_DISABLE) continue;
		// local constraints are handled in armature.c only 
		if (con->flag & CONSTRAINT_LOCAL) continue;

		/* Clear accumulators if necessary*/
		if (clear) {
			clear= 0;
			a= 0;
			tot= 0;
			memset(aquat, 0, sizeof(float)*4);
			memset(aloc, 0, sizeof(float)*3);
			memset(asize, 0, sizeof(float)*3);
		}
		
		enf = con->enforce;	// value from ipos (from action channels)

		/* Get the targetmat */
		get_constraint_target_matrix(con, obtype, obdata, tmat, size, ctime);
		
		Mat4CpyMat4(focusmat, tmat);
		
		/* Extract the components & accumulate */
		Mat4ToQuat(focusmat, quat);
		VECCOPY(loc, focusmat[3]);
		Mat3CpyMat4(mat, focusmat);
		Mat3ToSize(mat, size);
		
		a+= enf;
		tot++;
		
		for(i=0; i<3; i++) {
			aquat[i+1]+=(quat[i+1]) * enf;
			aloc[i]+=(loc[i]) * enf;
			asize[i]+=(size[i]-1.0f) * enf;
		}
		aquat[0]+=(quat[0])*enf;
		Mat4CpyMat4(lastmat, focusmat);
		
		/* removed for now, probably becomes option? (ton) */
		
		/* If the next constraint is not the same type (or there isn't one),
		 *	then evaluate the accumulator & request a clear */
		if (TRUE) { //(!con->next)||(con->next && con->next->type!=con->type)) {
			clear= 1;
			Mat4CpyMat4(oldmat, ob->obmat);

			/*	If we have several inputs, do a blend of them */
			if (tot) {
				if (tot>1) {
					if (a) {
						for (i=0; i<3; i++) {
							asize[i]=1.0f + (asize[i]/(a));
							aloc[i]=(aloc[i]/a);
						}
						
						NormalQuat(aquat);
						
						QuatToMat3(aquat, rmat);
						SizeToMat3(asize, smat);
						Mat3MulMat3(mat, rmat, smat);
						Mat4CpyMat3(focusmat, mat);
						VECCOPY(focusmat[3], aloc);

						evaluate_constraint(con, ob, obtype, obdata, focusmat);
					}
					
				}	
				/* If we only have one, blend with the current obmat */
				else {
					float solution[4][4];
					float delta[4][4];
					float imat[4][4];
					float identity[4][4];
					
					if (con->type!=CONSTRAINT_TYPE_KINEMATIC) {
						/* If we're not an IK constraint, solve the constraint then blend it to the previous one */
						evaluate_constraint(con, ob, obtype, obdata, lastmat);
						
						Mat4CpyMat4 (solution, ob->obmat);

						/* Interpolate the enforcement */					
						Mat4Invert (imat, oldmat);
						Mat4MulMat4 (delta, solution, imat);
						
						if (a<1.0) {
							Mat4One(identity);
							Mat4BlendMat4(delta, identity, delta, a);
						}
						Mat4MulMat4 (ob->obmat, delta, oldmat);

					}
				}
			}
		}
	}	
}

/* for calculation of the inverse parent transform, only used for editor */
void what_does_parent(Object *ob)
{

	clear_workob();
	Mat4One(workob.obmat);
	Mat4One(workob.parentinv);
	workob.parent= ob->parent;
	workob.track= ob->track;

	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;

	strcpy (workob.parsubstr, ob->parsubstr); 

	where_is_object(&workob);
}

BoundBox *unit_boundbox()
{
	BoundBox *bb;
	float min[3] = {-1,-1,-1}, max[3] = {-1,-1,-1};

	bb= MEM_mallocN(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->data);
	}
	else if ELEM3(ob->type, OB_CURVE, OB_SURF, OB_FONT) {
		bb= ( (Curve *)ob->data )->bb;
	}
	else if(ob->type==OB_MBALL) {
		bb= ob->bb;
	}
	return bb;
}

void minmax_object(Object *ob, float *min, float *max)
{
	BoundBox bb;
	Mesh *me;
	Curve *cu;
	float vec[3];
	int a;
	
	switch(ob->type) {
		
	case OB_CURVE:
	case OB_FONT:
	case OB_SURF:
		cu= ob->data;
		
		if(cu->bb==NULL) tex_space_curve(cu);
		bb= *(cu->bb);
		
		for(a=0; a<8; a++) {
			Mat4MulVecfl(ob->obmat, bb.vec[a]);
			DO_MINMAX(bb.vec[a], min, max);
		}
		break;
	case OB_ARMATURE:
		if(ob->pose) {
			bPoseChannel *pchan;
			for(pchan= ob->pose->chanbase.first; pchan; pchan= pchan->next) {
				VECCOPY(vec, pchan->pose_head);
				Mat4MulVecfl(ob->obmat, vec);
				DO_MINMAX(vec, min, max);
				VECCOPY(vec, pchan->pose_tail);
				Mat4MulVecfl(ob->obmat, vec);
				DO_MINMAX(vec, min, max);
			}
			break;
		}
		/* no break, get_mesh will give NULL and it passes on to default */
	case OB_MESH:
		me= get_mesh(ob);
		
		if(me) {
			bb = *mesh_get_bb(me);
			
			for(a=0; a<8; a++) {
				Mat4MulVecfl(ob->obmat, bb.vec[a]);
				DO_MINMAX(bb.vec[a], min, max);
			}
		}
		if(min[0] < max[0] ) break;
		
		/* else here no break!!!, mesh can be zero sized */
		
	default:
		DO_MINMAX(ob->obmat[3], min, max);

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

		VECCOPY(vec, ob->obmat[3]);
		VecSubf(vec, vec, ob->size);
		DO_MINMAX(vec, min, max);
		break;
	}
}

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


/* the main object update call, for object matrix, constraints, keys and displist (modifiers) */
/* requires flags to be set! */
void object_handle_update(Object *ob)
{
	if(ob->recalc & OB_RECALC) {
		
		if(ob->recalc & OB_RECALC_OB) {
			if(ob->id.lib && ob->proxy)
				Mat4CpyMat4(ob->obmat, ob->proxy->obmat);
			else
				where_is_object(ob);
		}
		
		if(ob->recalc & OB_RECALC_DATA) {
			
			// printf("recalcdata %s\n", ob->id.name+2);
			
			/* includes all keys and modifiers */
			if(ob->type==OB_MESH) {
				makeDispListMesh(ob);
			}
			else if(ob->type==OB_MBALL) {
				makeDispListMBall(ob);
			} 
			else if(ELEM3(ob->type, OB_CURVE, OB_SURF, OB_FONT)) {
				makeDispListCurveTypes(ob, 0);
			}
			else if(ob->type==OB_LATTICE) {
				lattice_calc_modifiers(ob);
			}
			else if(ob->type==OB_ARMATURE) {
				/* this happens for reading old files and to match library armatures with poses */
				if(ob->pose==NULL || (ob->pose->flag & POSE_RECALC))
					armature_rebuild_pose(ob, ob->data);
				
				if(ob->id.lib && ob->proxy)
					copy_pose_result(ob->pose, ob->proxy->pose);
				else {
					do_all_pose_actions(ob);
					where_is_pose(ob);
				}
			}
		}
	
		if(ob->id.lib==NULL && ob->proxy)
			object_handle_update(ob->proxy);
		
		ob->recalc &= ~OB_RECALC;
	}
}