/atom
	layer = 2
	var/level = 2
	var/flags = 0
	var/list/fingerprints
	var/list/fingerprintshidden
	var/fingerprintslast = null
	var/list/blood_DNA
	var/blood_color
	var/last_bumped = 0
	var/pass_flags = 0
	var/throwpass = 0
	var/germ_level = GERM_LEVEL_AMBIENT // The higher the germ level, the more germ on the atom.
	var/simulated = 1 //filter for actions - used by lighting overlays

	///Chemistry.
	var/datum/reagents/reagents = null

	//var/chem_is_open_container = 0
	// replaced by OPENCONTAINER flags and atom/proc/is_open_container()
	///Chemistry.


	//Value used to increment ex_act() if reactionary_explosions is on
	var/explosion_block = 0

	//Detective Work, used for the duplicate data points kept in the scanners
	var/list/original_atom

	var/allow_spin = 1 //Set this to 1 for a _target_ that is being thrown at; if an atom has this set to 1 then atoms thrown AT it will not spin; currently used for the singularity. -Fox

/atom/Destroy()
	if(reagents)
		qdel(reagents)
		reagents = null
	set_opacity(0)
	invisibility = 101
	return ..()

/atom/proc/CheckParts()
	return

/atom/proc/assume_air(datum/gas_mixture/giver)
	return null

/atom/proc/remove_air(amount)
	return null

/atom/proc/return_air()
	if(loc)
		return loc.return_air()
	else
		return null

/atom/proc/check_eye(user as mob)
	if (istype(user, /mob/living/silicon/ai)) // WHYYYY
		return 1
	return

/atom/proc/on_reagent_change()
	return

/atom/proc/Bumped(AM as mob|obj)
	return

// Convenience proc to see if a container is open for chemistry handling
// returns true if open
// false if closed
/atom/proc/is_open_container()
	return flags & OPENCONTAINER

/*//Convenience proc to see whether a container can be accessed in a certain way.

	proc/can_subract_container()
		return flags & EXTRACT_CONTAINER

	proc/can_add_container()
		return flags & INSERT_CONTAINER
*/



/atom/proc/allow_drop()
	return 1

/atom/proc/CheckExit()
	return 1

/atom/proc/HasProximity(atom/movable/AM as mob|obj)
	return

/atom/proc/emp_act(var/severity)
	return

/atom/proc/bullet_act(var/obj/item/projectile/Proj, def_zone)
	Proj.on_hit(src, 0, def_zone)
	return 0

/atom/proc/in_contents_of(container)//can take class or object instance as argument
	if(ispath(container))
		if(istype(src.loc, container))
			return 1
	else if(src in container)
		return 1
	return

/*
 *	atom/proc/search_contents_for(path,list/filter_path=null)
 * Recursevly searches all atom contens (including contents contents and so on).
 *
 * ARGS: path - search atom contents for atoms of this type
 *	   list/filter_path - if set, contents of atoms not of types in this list are excluded from search.
 *
 * RETURNS: list of found atoms
 */

/atom/proc/search_contents_for(path,list/filter_path=null)
	var/list/found = list()
	for(var/atom/A in src)
		if(istype(A, path))
			found += A
		if(filter_path)
			var/pass = 0
			for(var/type in filter_path)
				pass |= istype(A, type)
			if(!pass)
				continue
		if(A.contents.len)
			found += A.search_contents_for(path,filter_path)
	return found




/*
Beam code by Gunbuddy

Beam() proc will only allow one beam to come from a source at a time.  Attempting to call it more than
once at a time per source will cause graphical errors.
Also, the icon used for the beam will have to be vertical and 32x32.
The math involved assumes that the icon is vertical to begin with so unless you want to adjust the math,
its easier to just keep the beam vertical.
*/
/atom/proc/Beam(atom/BeamTarget,icon_state="b_beam",icon='icons/effects/beam.dmi',time=50, maxdistance=10)
	//BeamTarget represents the target for the beam, basically just means the other end.
	//Time is the duration to draw the beam
	//Icon is obviously which icon to use for the beam, default is beam.dmi
	//Icon_state is what icon state is used. Default is b_beam which is a blue beam.
	//Maxdistance is the longest range the beam will persist before it gives up.
	var/EndTime=world.time+time
	var/broken = 0
	var/obj/item/projectile/beam/lightning/light = new
	while(BeamTarget&&world.time<EndTime&&get_dist(src,BeamTarget)<maxdistance&&z==BeamTarget.z)
	//If the BeamTarget gets deleted, the time expires, or the BeamTarget gets out
	//of range or to another z-level, then the beam will stop.  Otherwise it will
	//continue to draw.


		//dir=get_dir(src,BeamTarget)	//Causes the source of the beam to rotate to continuosly face the BeamTarget.

		for(var/obj/effect/overlay/beam/O in orange(10,src))	//This section erases the previously drawn beam because I found it was easier to
			if(O.BeamSource==src)				//just draw another instance of the beam instead of trying to manipulate all the
				qdel(O)							//pieces to a new orientation.
		var/Angle=round(Get_Angle(src,BeamTarget))
		var/icon/I=new(icon,icon_state)
		I.Turn(Angle)
		var/DX=(32*BeamTarget.x+BeamTarget.pixel_x)-(32*x+pixel_x)
		var/DY=(32*BeamTarget.y+BeamTarget.pixel_y)-(32*y+pixel_y)
		var/N=0
		var/length=round(sqrt((DX)**2+(DY)**2))
		for(N,N<length,N+=32)
			var/obj/effect/overlay/beam/X=new(loc)
			X.BeamSource=src
			if(N+32>length)
				var/icon/II=new(icon,icon_state)
				II.DrawBox(null,1,(length-N),32,32)
				II.Turn(Angle)
				X.icon=II
			else X.icon=I
			var/Pixel_x=round(sin(Angle)+32*sin(Angle)*(N+16)/32)
			var/Pixel_y=round(cos(Angle)+32*cos(Angle)*(N+16)/32)
			if(DX==0) Pixel_x=0
			if(DY==0) Pixel_y=0
			if(Pixel_x>32)
				for(var/a=0, a<=Pixel_x,a+=32)
					X.x++
					Pixel_x-=32
			if(Pixel_x<-32)
				for(var/a=0, a>=Pixel_x,a-=32)
					X.x--
					Pixel_x+=32
			if(Pixel_y>32)
				for(var/a=0, a<=Pixel_y,a+=32)
					X.y++
					Pixel_y-=32
			if(Pixel_y<-32)
				for(var/a=0, a>=Pixel_y,a-=32)
					X.y--
					Pixel_y+=32
			X.pixel_x=Pixel_x
			X.pixel_y=Pixel_y
			var/turf/TT = get_turf(X.loc)
			if(TT.density)
				qdel(X)
				break
			for(var/obj/O in TT)
				if(!O.CanPass(light))
					broken = 1
					break
				else if(O.density)
					broken = 1
					break
			if(broken)
				qdel(X)
				break
		sleep(3)	//Changing this to a lower value will cause the beam to follow more smoothly with movement, but it will also be more laggy.
					//I've found that 3 ticks provided a nice balance for my use.
	for(var/obj/effect/overlay/beam/O in orange(10,src)) if(O.BeamSource==src) qdel(O)


//All atoms
/atom/verb/examine()
	set name = "Examine"
	set category = "IC"
	set src in view(usr.client) //If it can be seen, it can be examined.
	set popup_menu = 0

	if (!( usr ))
		return
	usr << "That's \a [src]." //changed to "That's" from "This is" because "This is some metal sheets" sounds dumb compared to "That's some metal sheets" ~Carn
	usr << desc
	// *****RM
	//usr << "[name]: Dn:[density] dir:[dir] cont:[contents] icon:[icon] is:[icon_state] loc:[loc]"
	return

/atom/proc/relaymove()
	return

//called to set the atom's dir and used to add behaviour to dir-changes - Not fully used (yet)
/atom/proc/set_dir(new_dir)
	. = new_dir != dir
	dir = new_dir

/atom/proc/ex_act()
	return

/atom/proc/blob_act()
	return

/atom/proc/fire_act()
	return

/atom/proc/emag_act()
	return

/atom/proc/hitby(atom/movable/AM as mob|obj)
	if (density)
		AM.throwing = 0
	return

/atom/proc/add_hiddenprint(mob/living/M as mob)
	if(isnull(M)) return
	if(isnull(M.key)) return
	if(ishuman(M))
		var/mob/living/carbon/human/H = M
		if(!istype(H.dna, /datum/dna))
			return 0
		if(H.gloves)
			if(fingerprintslast != H.ckey)
				//Add the list if it does not exist.
				if(!fingerprintshidden)
					fingerprintshidden = list()
				fingerprintshidden += text("\[[time_stamp()]\] (Wearing gloves). Real name: [], Key: []",H.real_name, H.key)
				fingerprintslast = H.ckey
			return 0
		if(!( fingerprints ))
			if(fingerprintslast != H.ckey)
				//Add the list if it does not exist.
				if(!fingerprintshidden)
					fingerprintshidden = list()
				fingerprintshidden += text("\[[time_stamp()]\] Real name: [], Key: []",H.real_name, H.key)
				fingerprintslast = H.ckey
			return 1
	else
		if(fingerprintslast != M.ckey)
			//Add the list if it does not exist.
			if(!fingerprintshidden)
				fingerprintshidden = list()
			fingerprintshidden += text("\[[time_stamp()]\] Real name: [], Key: []",M.real_name, M.key)
			fingerprintslast = M.ckey
	return


//Set ignoregloves to add prints irrespective of the mob having gloves on.
/atom/proc/add_fingerprint(mob/living/M as mob, ignoregloves = 0)
	if(isnull(M)) return
	if(isnull(M.key)) return
	if(ishuman(M))
		//Add the list if it does not exist.
		if(!fingerprintshidden)
			fingerprintshidden = list()

		//Fibers~
		add_fibers(M)

		//He has no prints!
		if (FINGERPRINTS in M.mutations)
			if(fingerprintslast != M.key)
				fingerprintshidden += "(Has no fingerprints) Real name: [M.real_name], Key: [M.key]"
				fingerprintslast = M.key
			return 0		//Now, lets get to the dirty work.
		//First, make sure their DNA makes sense.
		var/mob/living/carbon/human/H = M
		if (!istype(H.dna, /datum/dna) || !H.dna.uni_identity || (length(H.dna.uni_identity) != 32))
			if(!istype(H.dna, /datum/dna))
				H.dna = new /datum/dna(null)
				H.dna.real_name = H.real_name
		H.check_dna()

		//Check if the gloves (if any) hide fingerprints
		if(H.gloves)
			var/obj/item/clothing/gloves/G = H.gloves
			if(G.transfer_prints)
				ignoregloves = 1

		//Now, deal with gloves.
		if(!ignoregloves)
			if(H.gloves && H.gloves != src)
				if(fingerprintslast != H.ckey)
					fingerprintshidden += text("\[[]\](Wearing gloves). Real name: [], Key: []",time_stamp(), H.real_name, H.key)
					fingerprintslast = H.ckey
				H.gloves.add_fingerprint(M)
				return 0

		//More adminstuffz
		if(fingerprintslast != H.ckey)
			fingerprintshidden += text("\[[]\]Real name: [], Key: []",time_stamp(), H.real_name, H.key)
			fingerprintslast = H.ckey

		//Make the list if it does not exist.
		if(!fingerprints)
			fingerprints = list()

		//Hash this shit.
		var/full_print = md5(H.dna.uni_identity)

		// Add the fingerprints
		fingerprints[full_print] = full_print

		return 1
	else
		//Smudge up dem prints some
		if(fingerprintslast != M.ckey)
			fingerprintshidden += text("\[[]\]Real name: [], Key: []",time_stamp(), M.real_name, M.key)
			fingerprintslast = M.ckey

	return


/atom/proc/transfer_fingerprints_to(var/atom/A)

	// Make sure everything are lists.
	if(!islist(A.fingerprints))
		A.fingerprints = list()
	if(!islist(A.fingerprintshidden))
		A.fingerprintshidden = list()

	if(!islist(fingerprints))
		fingerprints = list()
	if(!islist(fingerprintshidden))
		fingerprintshidden = list()

	// Transfer
	if(fingerprints)
		A.fingerprints |= fingerprints.Copy()            //detective
	if(fingerprintshidden)
		A.fingerprintshidden |= fingerprintshidden.Copy()    //admin
	A.fingerprintslast = fingerprintslast


//returns 1 if made bloody, returns 0 otherwise
/atom/proc/add_blood(mob/living/carbon/human/M as mob)

	if(flags & NOBLOODY)
		return 0

	if(!blood_DNA || !istype(blood_DNA, /list))	//if our list of DNA doesn't exist yet (or isn't a list) initialise it.
		blood_DNA = list()

	blood_color = "#A10808"
	if(istype(M))
		if (!istype(M.dna, /datum/dna))
			M.dna = new /datum/dna(null)
			M.dna.real_name = M.real_name
		M.check_dna()
		if (M.species)
			blood_color = M.species.blood_color
	. = 1
	return 1


/atom/proc/clean_blood()
	src.germ_level = 0
	if(istype(blood_DNA, /list))
		qdel(blood_DNA)
		return 1

/atom/proc/add_vomit_floor(mob/living/carbon/M as mob, var/toxvomit = 0)
	if( istype(src, /turf/simulated) )
		var/obj/effect/decal/cleanable/vomit/this = new /obj/effect/decal/cleanable/vomit(src)

		// Make toxins vomit look different
		if(toxvomit)
			this.icon_state = "vomittox_[pick(1,4)]"

/atom/proc/add_poop_floor(mob/living/carbon/M as mob)
	if( istype(src, /turf/simulated) )
		new /obj/effect/decal/cleanable/poop(src)


/atom/proc/get_global_map_pos()
	if(!islist(global_map) || isemptylist(global_map)) return
	var/cur_x = null
	var/cur_y = null
	var/list/y_arr = null
	for(cur_x=1,cur_x<=global_map.len,cur_x++)
		y_arr = global_map[cur_x]
		cur_y = y_arr.Find(src.z)
		if(cur_y)
			break
//	world << "X = [cur_x]; Y = [cur_y]"
	if(cur_x && cur_y)
		return list("x"=cur_x,"y"=cur_y)
	else
		return 0

/atom/proc/checkpass(passflag)
	return pass_flags&passflag

/atom/proc/isinspace()
	if(istype(get_turf(src), /turf/space))
		return 1
	else
		return 0

/atom/proc/singularity_act()
	return

/atom/proc/singularity_pull()
	return

/atom/proc/narsie_act()
	return