/* object.c
 *
 * 
 * $Id: object.c 16836 2008-09-29 23:46:01Z campbellbarton $
 *
 * ***** 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., 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 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_meta_types.h"
#include "DNA_curve_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_particle_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_bullet.h"
#include "BKE_colortools.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_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_particle.h"
#include "BKE_pointcache.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"

#include "GPU_material.h"

#include "blendef.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_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);
}

/* 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);
}

/* 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->poselib) ob->poselib->id.us--;
	if(ob->dup_group) ob->dup_group->id.us--;
	if(ob->defbase.first)
		BLI_freelistN(&ob->defbase);
	if(ob->pose)
		free_pose(ob->pose);
	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){
		if(ob->pd->tex)
			ob->pd->tex->id.us--;
		MEM_freeN(ob->pd);
	}
	if(ob->soft) sbFree(ob->soft);
	if(ob->bsoft) bsbFree(ob->bsoft);
	if(ob->gpulamp.first) GPU_lamp_free(ob);
}

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;
	Camera *camera;
	bConstraint *con;
	bActionStrip *strip;
	ModifierData *md;
	int a;
	
	unlink_controllers(&ob->controllers);
	unlink_actuators(&ob->actuators);
	
	/* check all objects: parents en bevels and fields, also from libraries */
	obt= G.main->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;
		}
		
		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) {
					bConstraintTypeInfo *cti= constraint_get_typeinfo(con);
					ListBase targets = {NULL, NULL};
					bConstraintTarget *ct;
					
					if (cti && cti->get_constraint_targets) {
						cti->get_constraint_targets(con, &targets);
						
						for (ct= targets.first; ct; ct= ct->next) {
							if (ct->tar == ob) {
								ct->tar = NULL;
								strcpy(ct->subtarget, "");
								obt->recalc |= OB_RECALC_DATA;
							}
						}
						
						if (cti->flush_constraint_targets)
							cti->flush_constraint_targets(con, &targets, 0);
					}
				}
				if(pchan->custom==ob)
					pchan->custom= NULL;
			}
		}
		
		sca_remove_ob_poin(obt, ob);
		
		for (con = obt->constraints.first; con; con=con->next) {
			bConstraintTypeInfo *cti= constraint_get_typeinfo(con);
			ListBase targets = {NULL, NULL};
			bConstraintTarget *ct;
			
			if (cti && cti->get_constraint_targets) {
				cti->get_constraint_targets(con, &targets);
				
				for (ct= targets.first; ct; ct= ct->next) {
					if (ct->tar == ob) {
						ct->tar = NULL;
						strcpy(ct->subtarget, "");
						obt->recalc |= OB_RECALC_DATA;
					}
				}
				
				if (cti->flush_constraint_targets)
					cti->flush_constraint_targets(con, &targets, 0);
			}
		}
		
		/* object is deflector or field */
		if(ob->pd) {
			if(obt->soft)
				obt->recalc |= OB_RECALC_DATA;

			/* cloth */
			for(md=obt->modifiers.first; md; md=md->next)
				if(md->type == eModifierType_Cloth)
					obt->recalc |= OB_RECALC_DATA;
		}
		
		/* strips */
		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;
			}
		}

		/* particle systems */
		if(obt->particlesystem.first) {
			ParticleSystem *tpsys= obt->particlesystem.first;
			for(; tpsys; tpsys=tpsys->next) {
				if(tpsys->keyed_ob==ob) {
					ParticleSystem *psys= BLI_findlink(&ob->particlesystem,tpsys->keyed_psys-1);

					if(psys && psys->keyed_ob) {
						tpsys->keyed_ob= psys->keyed_ob;
						tpsys->keyed_psys= psys->keyed_psys;
					}
					else
						tpsys->keyed_ob= NULL;

					obt->recalc |= OB_RECALC_DATA;
				}

				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->flag&PART_STICKY) {
					ParticleData *pa;
					int p;

					for(p=0,pa=tpsys->particles; p<tpsys->totpart; p++,pa++) {
						if(pa->stick_ob==ob) {
							pa->stick_ob= 0;
							pa->flag &= ~PARS_STICKY;
						}
					}
				}
			}
			if(ob->pd)
				obt->recalc |= OB_RECALC_DATA;
		}

		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==V3D_CAMOB) v3d->persp= V3D_PERSP;
					}
					if(v3d->localvd && v3d->localvd->camera==ob ) {
						v3d->localvd->camera= NULL;
						if(v3d->localvd->persp==V3D_CAMOB) v3d->localvd->persp= V3D_PERSP;
					}
				}
				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;
	}
	
	/* cameras */
	camera= G.main->camera.first;
	while(camera) {
		if (camera->dof_ob==ob) {
			camera->dof_ob = NULL;
		}
		camera= camera->id.next;
	}
}

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

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

	cam->lens= 35.0f;
	cam->angle= 49.14f;
	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;
		}
	}
}

/* get the camera's dof value, takes the dof object into account */
float dof_camera(Object *ob)
{
	Camera *cam = (Camera *)ob->data; 
	if (ob->type != OB_CAMERA)
		return 0.0;
	if (cam->dof_ob) {	
		/* too simple, better to return the distance on the view axis only
		 * return VecLenf(ob->obmat[3], cam->dof_ob->obmat[3]); */
		float mat[4][4], obmat[4][4];
		
		Mat4CpyMat4(obmat, ob->obmat);
		Mat4Ortho(obmat);
		Mat4Invert(ob->imat, obmat);
		Mat4MulMat4(mat, cam->dof_ob->obmat, ob->imat);
		return fabs(mat[3][2]);
	}
	return cam->YF_dofdist;
}

void *add_lamp(char *name)
{
	Lamp *la;
	
	la=  alloc_libblock(&G.main->lamp, ID_LA, name);
	
	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;
	la->ray_samp_method = LA_SAMP_HALTON;
	la->adapt_thresh = 0.001;
	la->preview=NULL;
	la->falloff_type = LA_FALLOFF_INVLINEAR;
	la->curfalloff = curvemapping_add(1, 0.0f, 1.0f, 1.0f, 0.0f);
	la->sun_effect_type = 0;
	la->horizon_brightness = 1.0;
	la->spread = 1.0;
	la->sun_brightness = 1.0;
	la->sun_size = 1.0;
	la->backscattered_light = 1.0;
	la->atm_turbidity = 2.0;
	la->atm_inscattering_factor = 1.0;
	la->atm_extinction_factor = 1.0;
	la->atm_distance_factor = 1.0;
	la->sun_intensity = 1.0;
	la->skyblendtype= MA_RAMP_ADD;
	la->skyblendfac= 1.0f;
	la->sky_colorspace= BLI_CS_CIE;
	la->sky_exposure= 1.0f;
	
	curvemapping_initialize(la->curfalloff);
	return la;
}

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

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

	if (la->preview) lan->preview = BKE_previewimg_copy(la->preview);

	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;

	curvemapping_free(la->curfalloff);
	
	BKE_previewimg_free(&la->preview);
	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("Mesh");
	case OB_CURVE: G.totcurve++; return add_curve("Curve", OB_CURVE);
	case OB_SURF: G.totcurve++; 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: G.totlamp++; return add_lamp("Lamp");
	case OB_LATTICE: return add_lattice("Lattice");
	case OB_WAVE: return add_wave();
	case OB_ARMATURE: return add_armature("Armature");
	case OB_EMPTY: return NULL;
	default:
		printf("add_obdata_from_type: Internal error, bad type: %d\n", type);
		return NULL;
	}
}

static 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; */

#if 0 /* not used yet */
	QuatOne(ob->quat);
	QuatOne(ob->dquat);
#endif 

	ob->col[0]= ob->col[1]= ob->col[2]= 1.0;
	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->constinv);
	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;
	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;
	
	/* 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) {
		/* no 3d view, this wont happen often */
		base->lay = 1;
		VECCOPY(ob->loc, G.scene->cursor);
		
		/* return now because v3d->viewquat isnt available */
		return;
	} else 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);
	}

	if (U.flag & USER_ADD_VIEWALIGNED) {
		v3d->viewquat[0]= -v3d->viewquat[0];

		/* Quats arnt used yet */
		/*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->keys= NULL;
	sbn->totkey= sbn->totpointkey= 0;
	
	sbn->scratch= NULL;

	sbn->pointcache= BKE_ptcache_copy(sb->pointcache);

	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;
}

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

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

	for(a=0, pa=psysn->particles; a<psysn->totpart; a++, pa++) {
		if(pa->hair)
			pa->hair= MEM_dupallocN(pa->hair);
		if(pa->keys)
			pa->keys= MEM_dupallocN(pa->keys);
	}

	if(psys->soft) {
		psysn->soft= copy_softbody(psys->soft);
		psysn->soft->particles = psysn;
	}
	
	psysn->pathcache= NULL;
	psysn->childcache= NULL;
	psysn->edit= NULL;
	psysn->effectors.first= psysn->effectors.last= 0;
	
	psysn->pathcachebufs.first = psysn->pathcachebufs.last = NULL;
	psysn->childcachebufs.first = psysn->childcachebufs.last = NULL;
	psysn->reactevents.first = psysn->reactevents.last = NULL;
	psysn->renderdata = NULL;
	
	psysn->pointcache= BKE_ptcache_copy(psys->pointcache);

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

	return psysn;
}

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

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

		BLI_addtail(&obn->particlesystem, npsys);

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

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

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

	for (chan = obn->pose->chanbase.first; chan; chan=chan->next){
		bConstraint *con;
		
		chan->flag &= ~(POSE_LOC|POSE_ROT|POSE_SIZE);
		
		for (con= chan->constraints.first; con; con= con->next) {
			bConstraintTypeInfo *cti= constraint_get_typeinfo(con);
			ListBase targets = {NULL, NULL};
			bConstraintTarget *ct;
			
			if(con->ipo) {
				IpoCurve *icu;
				for(icu= con->ipo->curve.first; icu; icu= icu->next) {
					if(icu->driver && icu->driver->ob==ob)
						icu->driver->ob= obn;
				}
			}
			
			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);
			}
		}
	}
}

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->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);
		modifier_copyData(md, nmd);
		BLI_addtail(&obn->modifiers, nmd);
	}
	
	BPY_copy_scriptlink(&ob->scriptlink);
	
	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);
	}
	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);
		if(obn->pd->tex)
			id_us_plus(&(obn->pd->tex->id));
	}
	obn->soft= copy_softbody(ob->soft);
	obn->bsoft = copy_bulletsoftbody(ob->bsoft);

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

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

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

	return obn;
}

void expand_local_object(Object *ob)
{
	bActionStrip *strip;
	ParticleSystem *psys;
	int a;
	
	id_lib_extern((ID *)ob->action);
	id_lib_extern((ID *)ob->ipo);
	id_lib_extern((ID *)ob->data);
	id_lib_extern((ID *)ob->dup_group);
	
	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);
	}
	for(psys=ob->particlesystem.first; psys; psys=psys->next)
		id_lib_extern((ID *)psys->part);
}

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;
	
	ob->proxy= ob->proxy_from= NULL;
	
	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 **************** */

/* when you make proxy, ensure the exposed layers are extern */
void armature_set_id_extern(Object *ob)
{
	bArmature *arm= ob->data;
	bPoseChannel *pchan;
	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);
	}
			
}

/* 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;
	
	/* copy transform */
	if(gob) {
		VECCOPY(ob->loc, gob->loc);
		VECCOPY(ob->rot, gob->rot);
		VECCOPY(ob->size, gob->size);
		
		group_tag_recalc(gob->dup_group);
	}
	else {
		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? */
	
	/* 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);
	ob->mat = NULL;
	if ((target->totcol) && (target->mat) && OB_SUPPORT_MATERIAL(ob)) {
		int i;
		ob->colbits = target->colbits;
		
		ob->actcol= target->actcol;
		ob->totcol= target->totcol;
		
		ob->mat = MEM_dupallocN(target->mat);
		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);
	}
}


/* *************** 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, float cfra, float ofs)
{
	/* returns float ( see frame_to_float in ipo.c) */
	
	/* bluroffs and fieldoffs are ugly globals that are set by render */
	cfra+= bluroffs+fieldoffs;

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

	return cfra;
}

void object_scale_to_mat3(Object *ob, float mat[][3])
{
	float vec[3];
	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, mat);
	}
	else {
		SizeToMat3(ob->size, mat);
	}
}

void object_rot_to_mat3(Object *ob, float mat[][3])
{
	float vec[3];
	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, mat);
	}
	else {
		EulToMat3(ob->rot, mat);
	}
}

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 */
	/* Quats arnt used yet */
	/*if(ob->transflag & OB_QUAT) {
		if(ob->ipo) {
			QuatMul(q1, ob->quat, ob->dquat);
			QuatToMat3(q1, rmat);
		}
		else {
			QuatToMat3(ob->quat, rmat);
		}
	}
	else {*/
		object_rot_to_mat3(ob, 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[4], x1, ctime;
	float timeoffs = 0.0, sf_orig = 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) {
		timeoffs = give_timeoffset(ob);
		SWAP(float, sf_orig, ob->sf);
	}
	
	/* catch exceptions: feature for nla stride editing */
	if(ob->ipoflag & OB_DISABLE_PATH) {
		ctime= 0.0f;
	}
	/* catch exceptions: curve paths used as a duplicator */
	else if(enable_cu_speed) {
		ctime= bsystem_time(ob, (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 - give_timeoffset(ob);
		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, sf_orig, ob->sf);
	}
	
	
	/* vec: 4 items! */
 	if( where_on_path(par, ctime, vec, dir) ) {

		if(cu->flag & CU_FOLLOW) {
			vectoquat(dir, ob->trackflag, ob->upflag, quat);
			
			/* the tilt */
			Normalize(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;
			
			for(eve= em->verts.first; eve; eve= eve->next) {
				if(eve->keyindex==nr) {
					memcpy(vec, eve->co, sizeof(float)*3);
					break;
				}
			}
		}
		else {
			DerivedMesh *dm = par->derivedFinal;
			
			if(dm) {
				int i, count = 0, numVerts = dm->getNumVerts(dm);
				int *index = (int *)dm->getVertDataArray(dm, CD_ORIGINDEX);
				float co[3];

				/* get the average of all verts with (original index == nr) */
				for(i = 0; i < numVerts; ++i, ++index) {
					if(*index == nr) {
						dm->getVertCo(dm, i, co);
						VecAddf(vec, vec, co);
						count++;
					}
				}

				if (count==0) {
					/* keep as 0,0,0 */
				} else if(count > 0) {
					VecMulf(vec, 1.0f / count);
				} else {
					/* use first index if its out of range */
					dm->getVertCo(dm, 0, vec);
				}
			}
		}
	}
	else if ELEM(par->type, OB_CURVE, OB_SURF) {
		Nurb *nu;
		Curve *cu;
		BPoint *bp;
		BezTriple *bezt;
		int found= 0;
		
		cu= par->data;
		nu= cu->nurb.first;
		if(par==G.obedit) nu= editNurb.first;
		
		count= 0;
		while(nu && !found) {
			if((nu->type & 7)==CU_BEZIER) {
				bezt= nu->bezt;
				a= nu->pntsu;
				while(a--) {
					if(count==nr) {
						found= 1;
						VECCOPY(vec, bezt->vec[1]);
						break;
					}
					count++;
					bezt++;
				}
			}
			else {
				bp= nu->bp;
				a= nu->pntsu*nu->pntsv;
				while(a--) {
					if(count==nr) {
						found= 1;
						memcpy(vec, bp->vec, sizeof(float)*3);
						break;
					}
					count++;
					bp++;
				}
			}
			nu= nu->next;
		}

	}
	else if(par->type==OB_LATTICE) {
		Lattice *latt= par->data;
		BPoint *bp;
		DispList *dl = find_displist(&par->disp, DL_VERTS);
		float *co = dl?dl->verts:NULL;
		
		if(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, 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 (0 = all ipos) */
		do_constraint_channels(&ob->constraints, &ob->constraintChannels, stime, 0);
	}
	else {
		/* but, the drivers have to be done */
		if(ob->ipo) do_ob_ipodrivers(ob, ob->ipo, stime);
		/* do constraint ipos ..., note it needs stime (1 = only drivers ipos) */
		do_constraint_channels(&ob->constraints, &ob->constraintChannels, stime, 1);
	}
	
	if(ob->parent) {
		Object *par= ob->parent;
		
		if(ob->ipoflag & OB_OFFS_PARENT) ctime-= give_timeoffset(ob);
		
		/* hurms, code below conflicts with depgraph... (ton) */
		/* and even worse, it gives bad effects for NLA stride too (try ctime != par->ctime, with MBlur) */
		pop= 0;
		if(no_parent_ipo==0 && stime != par->ctime) {
		
			// only for ipo systems? 
			pushdata(par, sizeof(Object));
			pop= 1;
			
			if(par->proxy_from);	// 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(give_timeoffset(ob))));
			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);
		
	}

	/* solve constraints */
	if (ob->constraints.first) {
		bConstraintOb *cob;
		
		cob= constraints_make_evalob(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);
	}
	
	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[4];
	float vec[3];
	float totmat[3][3];
	float tmat[4][4];
	
	VecSubf(vec, ob->obmat[3], targetmat[3]);
	vectoquat(vec, ob->trackflag, ob->upflag, quat);
	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(give_timeoffset(ob))));
			fac2= 1.0f-fac1;
			fp1= ob->obmat[0];
			fp2= slowmat[0];
			for(a=0; a<16; a++, fp1++, fp2++) {
				fp1[0]= fac1*fp1[0] + fac2*fp2[0];
			}
		}
		
	}
	else {
		object_to_mat4(ob, ob->obmat);
	}
	
	if(ob->track) 
		solve_tracking(ob, ob->track->obmat);

	/* solve constraints */
	if (ob->constraints.first) {
		bConstraintOb *cob;
		
		cob= constraints_make_evalob(ob, NULL, CONSTRAINT_OBTYPE_OBJECT);
		solve_constraints (&ob->constraints, cob, G.scene->r.cfra);
		constraints_clear_evalob(cob);
	}
	
	/*  WATCH IT!!! */
	ob->ipo= ipo;
}

/* 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);
	Mat4One(workob.constinv);
	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_callocN(sizeof(BoundBox), "bb");
	boundbox_set_from_min_max(bb, min, max);
	
	return bb;
}

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

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

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

/* TODO - use dupli objects bounding boxes */
void minmax_object_duplis(Object *ob, float *min, float *max)
{
	if ((ob->transflag & OB_DUPLI)==0) {
		return;
	} else {
		ListBase *lb;
		DupliObject *dob;
		
		lb= object_duplilist(G.scene, ob);
		for(dob= lb->first; dob; dob= dob->next) {
			if(dob->no_draw);
			else {
				/* should really use bound box of dup object */
				DO_MINMAX(dob->mat[3], min, max);
			}
		}
		free_object_duplilist(lb);	/* does restore */
	}
}


/* 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(Object *ob)
{
	if(ob->recalc & OB_RECALC) {
		
		if(ob->recalc & OB_RECALC_OB) {

			// 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;
					Mat4Invert(obg->imat, obg->obmat);
					Mat4MulMat4(ob->obmat, ob->proxy_from->obmat, obg->imat);
				}
				else
					Mat4CpyMat4(ob->obmat, ob->proxy_from->obmat);
			}
			else
				where_is_object(ob);
			if (G.f & G_DOSCRIPTLINKS) BPY_do_pyscript((ID *)ob, SCRIPT_OBJECTUPDATE);
		}
		
		if(ob->recalc & OB_RECALC_DATA) {
			
			// printf("recalcdata %s\n", ob->id.name+2);
			
			/* includes all keys and modifiers */
			if(ob->type==OB_MESH) {
				makeDerivedMesh(ob, get_viewedit_datamask());
			}
			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_CAMERA) {
				Camera *cam = (Camera *)ob->data;
				calc_ipo(cam->ipo, frame_to_float(G.scene->r.cfra));
				execute_ipo(&cam->id, cam->ipo);
			}
			else if(ob->type==OB_LAMP) {
				Lamp *la = (Lamp *)ob->data;
				calc_ipo(la->ipo, frame_to_float(G.scene->r.cfra));
				execute_ipo(&la->id, la->ipo);
			}
			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_from) {
					copy_pose_result(ob->pose, ob->proxy_from->pose);
					// printf("pose proxy copy, lib ob %s proxy %s\n", ob->id.name, ob->proxy_from->id.name);
				}
				else {
					do_all_pose_actions(ob);
					where_is_pose(ob);
				}
			}

			if(ob->particlesystem.first) {
				ParticleSystem *tpsys, *psys;
				DerivedMesh *dm;
				
				psys= ob->particlesystem.first;
				while(psys) {
					if(psys_check_enabled(ob, psys)) {
						particle_system_update(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(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;
				}
			}
			if (G.f & G_DOSCRIPTLINKS) BPY_do_pyscript((ID *)ob, SCRIPT_OBDATAUPDATE);
		}

		/* 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(ob->proxy);
		}
	
		ob->recalc &= ~OB_RECALC;
	}

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

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

int give_obdata_texspace(Object *ob, int **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 = RayIntersectsTriangle(ray_start, ray_normal, bb->vec[v1], bb->vec[v2], bb->vec[v3], &lambda, NULL);
	}
	
	return result;
}
