#define R_IDEAL_GAS_EQUATION	8.31 //kPa*L/(K*mol)
#define ONE_ATMOSPHERE		101.325	//kPa

#define CELL_VOLUME 2500	//liters in a cell
#define MOLES_CELLSTANDARD (ONE_ATMOSPHERE*CELL_VOLUME/(T20C*R_IDEAL_GAS_EQUATION))	//moles in a 2.5 m^3 cell at 101.325 Pa and 20 degC

#define O2STANDARD 0.21
#define N2STANDARD 0.79

#define MOLES_O2STANDARD MOLES_CELLSTANDARD*O2STANDARD	// O2 standard value (21%)
#define MOLES_N2STANDARD MOLES_CELLSTANDARD*N2STANDARD	// N2 standard value (79%)

#define MOLES_PLASMA_VISIBLE	0.5 //Moles in a standard cell after which plasma is visible

#define BREATH_VOLUME 0.5	//liters in a normal breath
//#define BREATH_VOLUME 500 // Buffing to increase the rate at which air is consumed. Used to be 0.5 -- TLE
#define BREATH_PERCENTAGE BREATH_VOLUME/CELL_VOLUME
	//Amount of air to take a from a tile
#define HUMAN_NEEDED_OXYGEN	MOLES_CELLSTANDARD*BREATH_PERCENTAGE*0.16
	//Amount of air needed before pass out/suffocation commences


#define MINIMUM_AIR_RATIO_TO_SUSPEND 0.1 // Was 0.05 -- TLE
	//Minimum ratio of air that must move to/from a tile to suspend group processing
#define MINIMUM_AIR_TO_SUSPEND MOLES_CELLSTANDARD*MINIMUM_AIR_RATIO_TO_SUSPEND
	//Minimum amount of air that has to move before a group processing can be suspended

#define MINIMUM_MOLES_DELTA_TO_MOVE MOLES_CELLSTANDARD*MINIMUM_AIR_RATIO_TO_SUSPEND //Either this must be active
#define MINIMUM_TEMPERATURE_TO_MOVE	T20C+100 		  //or this (or both, obviously)

#define MINIMUM_TEMPERATURE_RATIO_TO_SUSPEND 0.1 // Was 0.012 -- TLE
#define MINIMUM_TEMPERATURE_DELTA_TO_SUSPEND 4
	//Minimum temperature difference before group processing is suspended
#define MINIMUM_TEMPERATURE_DELTA_TO_CONSIDER 0.5
	//Minimum temperature difference before the gas temperatures are just set to be equal

#define MINIMUM_TEMPERATURE_FOR_SUPERCONDUCTION		T20C+10
#define MINIMUM_TEMPERATURE_START_SUPERCONDUCTION	T20C+200

#define FLOOR_HEAT_TRANSFER_COEFFICIENT 0.08
#define WALL_HEAT_TRANSFER_COEFFICIENT 0.03
#define SPACE_HEAT_TRANSFER_COEFFICIENT 0.20 //a hack to partly simulate radiative heat
#define OPEN_HEAT_TRANSFER_COEFFICIENT 0.40
#define WINDOW_HEAT_TRANSFER_COEFFICIENT 0.10 //a hack for now
	//Must be between 0 and 1. Values closer to 1 equalize temperature faster
	//Should not exceed 0.4 else strange heat flow occur

#define FIRE_MINIMUM_TEMPERATURE_TO_SPREAD	150+T0C
#define FIRE_MINIMUM_TEMPERATURE_TO_EXIST	100+T0C
#define FIRE_SPREAD_RADIOSITY_SCALE		0.85
#define FIRE_CARBON_ENERGY_RELEASED	  500000 //Amount of heat released per mole of burnt carbon into the tile
#define FIRE_PLASMA_ENERGY_RELEASED	 3000000 //Amount of heat released per mole of burnt plasma into the tile
#define FIRE_GROWTH_RATE			25000 //For small fires

//Plasma fire properties
#define PLASMA_MINIMUM_BURN_TEMPERATURE		100+T0C
#define PLASMA_UPPER_TEMPERATURE			1370+T0C
#define PLASMA_MINIMUM_OXYGEN_NEEDED		2
#define PLASMA_MINIMUM_OXYGEN_PLASMA_RATIO	30
#define PLASMA_OXYGEN_FULLBURN				10

#define T0C 273.15					// 0degC
#define T20C 293.15					// 20degC
#define TCMB 2.7					// -270.3degC

#define TANK_LEAK_PRESSURE		(30.*ONE_ATMOSPHERE)	// Tank starts leaking
#define TANK_RUPTURE_PRESSURE	(40.*ONE_ATMOSPHERE) // Tank spills all contents into atmosphere

#define TANK_FRAGMENT_PRESSURE	(50.*ONE_ATMOSPHERE) // Boom 3x3 base explosion
#define TANK_FRAGMENT_SCALE	    (10.*ONE_ATMOSPHERE) // +1 for each SCALE kPa aboe threshold
								// was 2 atm
#define MAX_EXPLOSION_RANGE		14					// Defaults to 12 (was 8) -- TLE


#define NORMPIPERATE 30					//pipe-insulation rate divisor
#define HEATPIPERATE 8					//heat-exch pipe insulation

#define FLOWFRAC 0.99				// fraction of gas transfered per process


//FLAGS BITMASK
#define ONBACK 1			// can be put in back slot
#define TABLEPASS 2			// can pass by a table or rack
#define HALFMASK 4			// mask only gets 1/2 of air supply from internals

#define HEADSPACE 4			// head wear protects against space

#define MASKINTERNALS 8		// mask allows internals
#define SUITSPACE 8			// suit protects against space

#define USEDELAY 16			// 1 second extra delay on use
#define NOSHIELD 32			// weapon not affected by shield
#define CONDUCT 64			// conducts electricity (metal etc.)
#define ONBELT 128			// can be put in belt slot
#define FPRINT 256			// takes a fingerprint
#define ON_BORDER 512		// item has priority to check when entering or leaving

#define GLASSESCOVERSEYES 1024
#define MASKCOVERSEYES 1024		// get rid of some of the other retardation in these flags
#define HEADCOVERSEYES 1024		// feel free to realloc these numbers for other purposes
#define MASKCOVERSMOUTH 2048		// on other items, these are just for mask/head
#define HEADCOVERSMOUTH 2048

#define OPENCONTAINER	4096	// is an open container for chemistry purposes

#define ONESIZEFITSALL	8192	// can be worn by fatties (or children? ugh)


// bitflags for clothing parts
#define HEAD			1
#define UPPER_TORSO		2
#define LOWER_TORSO		4
#define LEGS			8
#define FEET			16
#define ARMS			32
#define HANDS			64

// channel numbers for power

#define EQUIP 1
#define LIGHT 2
#define ENVIRON 3
#define TOTAL 4	//for total power used only

// bitflags for machine stat variable
#define BROKEN 1
#define NOPOWER 2
#define POWEROFF 4		// tbd
#define MAINT 8			// under maintaince

#define ENGINE_EJECT_Z 3

var/const
	GAS_O2 = 1 << 0
	GAS_N2 = 1 << 1
	GAS_PL = 1 << 2
	GAS_CO2 = 1 << 3
	GAS_N2O = 1 << 4