/atom
	layer = 2
	var/level = 2
	var/flags = 0
	var/list/fingerprints
	var/list/fingerprintshidden
	var/fingerprintslast = null
	var/list/blood_DNA
	var/list/other_DNA
	var/other_DNA_type = null
	var/was_bloodied
	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
	var/fluorescent // Shows up under a UV light.

	///Chemistry.
	var/datum/reagents/reagents = null
	var/list/reagents_to_add
	var/list/reagent_data

	var/list/atom_colours	 //used to store the different colors on an atom
							//its inherent color, the colored paint applied on it, special color effect etc...

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

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

	var/gfi_layer_rotation = GFI_ROTATION_DEFAULT

/atom/proc/reveal_blood()
	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

//return flags that should be added to the viewer's sight var.
//Otherwise return a negative number to indicate that the view should be cancelled.
/atom/proc/check_eye(user as mob)
	if (istype(user, /mob/living/silicon/ai)) // WHYYYY
		return 0
	return -1

/atom/proc/additional_sight_flags()
	return 0

/atom/proc/additional_see_invisible()
	return 0

/atom/proc/on_reagent_change()
	return

// This is called when AM collides with us.
/atom/proc/CollidedWith(atom/movable/AM)
	set waitfor = FALSE
	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/CheckExit()
	return 1

// If you want to use this, the atom must have the PROXMOVE flag, and the moving
// atom must also have the PROXMOVE flag currently to help with lag. ~ ComicIronic
/atom/proc/HasProximity(atom/movable/AM as mob|obj)
	return

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


/atom/proc/bullet_act(obj/item/projectile/P, def_zone)
	P.on_hit(src, 0, def_zone)
	. = 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


//All atoms
/atom/proc/examine(mob/user, var/distance = -1, var/infix = "", var/suffix = "")
	//This reformat names to get a/an properly working on item descriptions when they are bloody
	var/f_name = "\a [src][infix]."
	if(src.blood_DNA && !istype(src, /obj/effect/decal))
		if(gender == PLURAL)
			f_name = "some "
		else
			f_name = "a "
		if(blood_color != "#030303")
			f_name += "<span class='danger'>blood-stained</span> [name][infix]!"
		else
			f_name += "oil-stained [name][infix]."

	to_chat(user, "[icon2html(src, user)] That's [f_name] [suffix]")
	to_chat(user, desc)

	if(ishuman(user))
		var/mob/living/carbon/human/H = user
		if(H.glasses)
			H.glasses.glasses_examine_atom(src, H)

	if(description_cult && (user.mind?.special_role == "Cultist" || isobserver(src)))
		to_chat(user, FONT_SMALL(SPAN_CULT(description_cult)))
	if(desc_info || desc_fluff)
		to_chat(user, SPAN_NOTICE("This item has additional examine info. <a href=?src=\ref[src];examine=fluff>\[View\]</a>"))
	if(desc_antag && player_is_antag(user.mind))
		to_chat(user, SPAN_NOTICE("This item has additional antag info. <a href=?src=\ref[src];examine=fluff>\[View\]</a>"))

	return distance == -1 || (get_dist(src, user) <= distance)

/atom/Topic(href,href_list[])
	. = ..()
	if (.)
		return

	switch(href_list["examine"])
		if("fluff")
			usr.client.statpanel = "Examine"

// called by mobs when e.g. having the atom as their machine, pulledby, loc (AKA mob being inside the atom) or buckled var set.
// see code/modules/mob/mob_movement.dm for more.
/atom/proc/relaymove()
	return

//called to set the atom's dir and used to add behaviour to dir-changes
/atom/proc/set_dir(new_dir)
	. = new_dir != dir
	dir = new_dir

	// Lighting
	if (.)
		var/datum/light_source/L
		for (var/thing in light_sources)
			L = thing
			if (L.light_angle)
				L.source_atom.update_light()

/atom/proc/ex_act()
	set waitfor = FALSE
	return

/atom/proc/emag_act(var/remaining_charges, var/mob/user, var/emag_source)
	return NO_EMAG_ACT

/atom/proc/fire_act()
	return

/atom/proc/melt()
	return

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

/atom/proc/add_hiddenprint(mob/living/M)
	if(isnull(M)) return
	if(!istype(M, /mob)) 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(src.fingerprintslast != H.key)
				src.fingerprintshidden += text("\[[time_stamp()]\] (Wearing gloves). Real name: [], Key: []",H.real_name, H.key)
				src.fingerprintslast = H.key
			return 0
		if (!( src.fingerprints ))
			if(src.fingerprintslast != H.key)
				src.fingerprintshidden += text("\[[time_stamp()]\] Real name: [], Key: []",H.real_name, H.key)
				src.fingerprintslast = H.key
			return 1
	else
		if(src.fingerprintslast != M.key)
			src.fingerprintshidden += text("\[[time_stamp()]\] Real name: [], Key: []",M.real_name, M.key)
			src.fingerprintslast = M.key
	return

/atom/proc/add_fingerprint(mob/living/M, ignoregloves = 0)
	if(isnull(M)) return
	if(!istype(M, /mob)) return
	if(isAI(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 (mFingerprints 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()

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

		//Deal with gloves the pass finger/palm prints.
		if(!ignoregloves)
			if(istype(H.gloves, /obj/item/clothing/gloves) && H.gloves != src)
				var/obj/item/clothing/gloves/G = H.gloves
				if(!prob(G.fingerprint_chance))
					return 0

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

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

		//Hash this shit.
		var/full_print = H.get_full_print()

		// Add the fingerprints
		//
		if(fingerprints[full_print])
			switch(stringpercent(fingerprints[full_print]))		//tells us how many stars are in the current prints.

				if(28 to 32)
					if(prob(1))
						fingerprints[full_print] = full_print 		// You rolled a one buddy.
					else
						fingerprints[full_print] = stars(full_print, rand(0,40)) // 24 to 32

				if(24 to 27)
					if(prob(3))
						fingerprints[full_print] = full_print     	//Sucks to be you.
					else
						fingerprints[full_print] = stars(full_print, rand(15, 55)) // 20 to 29

				if(20 to 23)
					if(prob(5))
						fingerprints[full_print] = full_print		//Had a good run didn't ya.
					else
						fingerprints[full_print] = stars(full_print, rand(30, 70)) // 15 to 25

				if(16 to 19)
					if(prob(5))
						fingerprints[full_print] = full_print		//Welp.
					else
						fingerprints[full_print]  = stars(full_print, rand(40, 100))  // 0 to 21

				if(0 to 15)
					if(prob(5))
						fingerprints[full_print] = stars(full_print, rand(0,50)) 	// small chance you can smudge.
					else
						fingerprints[full_print] = full_print

		else
			fingerprints[full_print] = stars(full_print, rand(0, 20))	//Initial touch, not leaving much evidence the first time.


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

	//Cleaning up shit.
	if(fingerprints && !fingerprints.len)
		qdel(fingerprints)
	return


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

	if(!istype(A.fingerprints,/list))
		A.fingerprints = list()

	if(!istype(A.fingerprintshidden,/list))
		A.fingerprintshidden = list()

	if(!istype(fingerprintshidden, /list))
		fingerprintshidden = list()

	//skytodo
	//A.fingerprints |= fingerprints            //detective
	//A.fingerprintshidden |= fingerprintshidden    //admin
	if(A.fingerprints && fingerprints)
		A.fingerprints |= fingerprints.Copy()            //detective
	if(A.fingerprintshidden && 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)

	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()

	was_bloodied = 1
	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

//For any objects that may require additional handling when swabbed, e.g. a beaker may need to provide information about its contents, not just itself
//Children must return additional_evidence list
/atom/proc/get_additional_forensics_swab_info()
	SHOULD_CALL_PARENT(TRUE)
	var/list/additional_evidence = list(
		"type" = "",
		"dna" = list(),
		"gsr" = "",
		"sample_type" = "",
		"sample_message" = ""
	)

	return additional_evidence

/atom/proc/add_vomit_floor(var/mob/living/carbon/M, var/toxvomit = 0, var/datum/reagents/inject_reagents)
	if(istype(src, /turf/simulated))
		var/obj/effect/decal/cleanable/vomit/this = new /obj/effect/decal/cleanable/vomit(src)
		if(istype(inject_reagents) && inject_reagents.total_volume)
			inject_reagents.trans_to_obj(this, min(15, inject_reagents.total_volume))
			this.reagents.add_reagent(/datum/reagent/acid/stomach, 5)

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

/mob/living/proc/handle_additional_vomit_reagents(var/obj/effect/decal/cleanable/vomit/vomit)
	vomit.reagents.add_reagent(/datum/reagent/acid/stomach, 5)

/atom/proc/clean_blood()
	if(!simulated)
		return
	fluorescent = 0
	src.germ_level = 0
	if(istype(blood_DNA, /list))
		blood_DNA = null
		return TRUE

/atom/proc/on_rag_wipe(var/obj/item/reagent_containers/glass/rag/R)
	clean_blood()
	R.reagents.splash(src, 1)

/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

	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

// Show a message to all mobs and objects in sight of this atom
// Use for objects performing visible actions
// message is output to anyone who can see, e.g. "The [src] does something!"
// blind_message (optional) is what blind people will hear e.g. "You hear something!"
/atom/proc/visible_message(var/message, var/blind_message, var/range = world.view)
	var/turf/T = get_turf(src)
	var/list/mobs = list()
	var/list/objs = list()
	get_mobs_and_objs_in_view_fast(T,range, mobs, objs, ONLY_GHOSTS_IN_VIEW)

	for(var/o in objs)
		var/obj/O = o
		O.show_message(message,1,blind_message,2)

	for(var/m in mobs)
		var/mob/M = m
		if(M.see_invisible >= invisibility)
			M.show_message(message,1,blind_message,2)
		else if(blind_message)
			M.show_message(blind_message, 2)

// Show a message to all mobs and objects in earshot of this atom
// Use for objects performing audible actions
// message is the message output to anyone who can hear.
// deaf_message (optional) is what deaf people will see.
// hearing_distance (optional) is the range, how many tiles away the message can be heard.
/atom/proc/audible_message(var/message, var/deaf_message, var/hearing_distance)

	var/range = world.view
	if(hearing_distance)
		range = hearing_distance
	var/turf/T = get_turf(src)
	var/list/mobs = list()
	var/list/objs = list()
	get_mobs_and_objs_in_view_fast(T,range, mobs, objs, ONLY_GHOSTS_IN_VIEW)

	for(var/m in mobs)
		var/mob/M = m
		M.show_message(message,2,deaf_message,1)
	for(var/o in objs)
		var/obj/O = o
		O.show_message(message,2,deaf_message,1)

/atom/proc/change_area(var/area/oldarea, var/area/newarea)
	change_area_name(oldarea.name, newarea.name)

/atom/proc/change_area_name(var/oldname, var/newname)
	name = replacetext(name,oldname,newname)

/atom/movable/proc/dropInto(var/atom/destination)
	while(istype(destination))
		var/atom/drop_destination = destination.onDropInto(src)
		if(!istype(drop_destination) || drop_destination == destination)
			return forceMove(destination)
		destination = drop_destination
	return forceMove(null)

/atom/proc/onDropInto(var/atom/movable/AM)
	return // If onDropInto returns null, then dropInto will forceMove AM into us.

/atom/movable/onDropInto(var/atom/movable/AM)
	return loc // If onDropInto returns something, then dropInto will attempt to drop AM there.