obj/machinery/atmospherics/pipe/simple/heat_exchanging
	icon = 'icons/atmos/heat.dmi'
	icon_state = "intact"
	pipe_icon = "hepipe"
	color = "#404040"
	level = 2
	connect_types = CONNECT_TYPE_HE
	layer = 2.41
	var/initialize_directions_he
	var/surface = 2	//surface area in m^2
	var/icon_temperature = T20C //stop small changes in temperature causing an icon refresh

	minimum_temperature_difference = 20
	thermal_conductivity = OPEN_HEAT_TRANSFER_COEFFICIENT

	buckle_lying = 1

	// BubbleWrap
	New()
		..()
		initialize_directions_he = initialize_directions	// The auto-detection from /pipe is good enough for a simple HE pipe
	// BubbleWrap END
		color = "#404040" //we don't make use of the fancy overlay system for colours, use this to set the default.

	initialize()
		normalize_dir()
		var/node1_dir
		var/node2_dir

		for(var/direction in cardinal)
			if(direction&initialize_directions_he)
				if (!node1_dir)
					node1_dir = direction
				else if (!node2_dir)
					node2_dir = direction

		for(var/obj/machinery/atmospherics/pipe/simple/heat_exchanging/target in get_step(src,node1_dir))
			if(target.initialize_directions_he & get_dir(target,src))
				node1 = target
				break
		for(var/obj/machinery/atmospherics/pipe/simple/heat_exchanging/target in get_step(src,node2_dir))
			if(target.initialize_directions_he & get_dir(target,src))
				node2 = target
				break
		if(!node1 && !node2)
			qdel(src)
			return

		update_icon()
		return


	process()
		if(!parent)
			..()
		else
			var/datum/gas_mixture/pipe_air = return_air()
			if(istype(loc, /turf/simulated/))
				var/environment_temperature = 0
				if(loc:blocks_air)
					environment_temperature = loc:temperature
				else
					var/datum/gas_mixture/environment = loc.return_air()
					environment_temperature = environment.temperature
				if(abs(environment_temperature-pipe_air.temperature) > minimum_temperature_difference)
					parent.temperature_interact(loc, volume, thermal_conductivity)
			else if(istype(loc, /turf/space/))
				parent.radiate_heat_to_space(surface, 1)

			if(buckled_mob)
				var/hc = pipe_air.heat_capacity()
				var/avg_temp = (pipe_air.temperature * hc + buckled_mob.bodytemperature * 3500) / (hc + 3500)
				pipe_air.temperature = avg_temp
				buckled_mob.bodytemperature = avg_temp

				var/heat_limit = 1000

				var/mob/living/carbon/human/H = buckled_mob
				if(istype(H) && H.species)
					heat_limit = H.species.heat_level_3

				if(pipe_air.temperature > heat_limit + 1)
					buckled_mob.apply_damage(4 * log(pipe_air.temperature - heat_limit), BURN, "chest", used_weapon = "Excessive Heat")

			//fancy radiation glowing
			if(pipe_air.temperature && (icon_temperature > 500 || pipe_air.temperature > 500)) //start glowing at 500K
				if(abs(pipe_air.temperature - icon_temperature) > 10)
					icon_temperature = pipe_air.temperature

					var/h_r = heat2color_r(icon_temperature)
					var/h_g = heat2color_g(icon_temperature)
					var/h_b = heat2color_b(icon_temperature)

					if(icon_temperature < 2000) //scale up overlay until 2000K
						var/scale = (icon_temperature - 500) / 1500
						h_r = 64 + (h_r - 64)*scale
						h_g = 64 + (h_g - 64)*scale
						h_b = 64 + (h_b - 64)*scale

					animate(src, color = rgb(h_r, h_g, h_b), time = 20, easing = SINE_EASING)




obj/machinery/atmospherics/pipe/simple/heat_exchanging/junction
	icon = 'icons/atmos/junction.dmi'
	icon_state = "intact"
	pipe_icon = "hejunction"
	level = 2
	connect_types = CONNECT_TYPE_REGULAR|CONNECT_TYPE_HE
	minimum_temperature_difference = 300
	thermal_conductivity = WALL_HEAT_TRANSFER_COEFFICIENT

	// BubbleWrap
	New()
		.. ()
		switch ( dir )
			if ( SOUTH )
				initialize_directions = NORTH
				initialize_directions_he = SOUTH
			if ( NORTH )
				initialize_directions = SOUTH
				initialize_directions_he = NORTH
			if ( EAST )
				initialize_directions = WEST
				initialize_directions_he = EAST
			if ( WEST )
				initialize_directions = EAST
				initialize_directions_he = WEST
	// BubbleWrap END

	initialize()
		for(var/obj/machinery/atmospherics/target in get_step(src,initialize_directions))
			if(target.initialize_directions & get_dir(target,src))
				node1 = target
				break
		for(var/obj/machinery/atmospherics/pipe/simple/heat_exchanging/target in get_step(src,initialize_directions_he))
			if(target.initialize_directions_he & get_dir(target,src))
				node2 = target
				break

		if(!node1&&!node2)
			qdel(src)
			return

		update_icon()
		return