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51 lines
2.3 KiB
Plaintext
51 lines
2.3 KiB
Plaintext
/*#######################################################
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LEGACY FILE, USE code\__DEFINES\maths.dm INSTEAD!
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########################################################*/
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// Math constants.
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#define M_PI 3.14159
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#define NUM_E 2.71828183
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#define R_IDEAL_GAS_EQUATION 8.31 // kPa*L/(K*mol).
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#define ONE_ATMOSPHERE 101.325 // kPa.
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#define IDEAL_GAS_ENTROPY_CONSTANT 1164 // (mol^3 * s^3) / (kg^3 * L).
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// Radiation constants.
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#define STEFAN_BOLTZMANN_CONSTANT 5.6704e-8 // W/(m^2*K^4).
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#define COSMIC_RADIATION_TEMPERATURE 3.15 // K.
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#define AVERAGE_SOLAR_RADIATION 200 // W/m^2. Kind of arbitrary. Really this should depend on the sun position much like solars.
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#define RADIATOR_OPTIMUM_PRESSURE 3771 // kPa at 20 C. This should be higher as gases aren't great conductors until they are dense. Used the critical pressure for air.
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#define GAS_CRITICAL_TEMPERATURE 132.65 // K. The critical point temperature for air.
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#define RADIATOR_EXPOSED_SURFACE_AREA_RATIO 0.04 // (3 cm + 100 cm * sin(3deg))/(2*(3+100 cm)). Unitless ratio.
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#define HUMAN_EXPOSED_SURFACE_AREA 5.2 //m^2, surface area of 1.7m (H) x 0.46m (D) cylinder
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/// 0.0 Degrees celsius, in Kelvin
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#define T0C 273.15
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/// 20.0 Degrees celsius, in Kelvin
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#define T20C 293.15
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/// -270.3 degrees celsius, in Kelvin
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#define TCMB 2.7
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#define QUANTIZE(variable) (round(variable,0.0001))
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#define INFINITY 1.#INF
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// A neat little helper to convert the value X, that's between imin and imax, into a value
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// that's proportionally scaled and in range of omin and omax.
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#define MAP(x, imin, imax, omin, omax) ((x - imin) * (omax - omin) / (imax - imin) + omin)
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#define RAND_F(LOW, HIGH) (rand()*(HIGH-LOW) + LOW)
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//time of day but automatically adjusts to the server going into the next day within the same round.
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//for when you need a reliable time number that doesn't depend on byond time.
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#define REALTIMEOFDAY (world.timeofday + (MIDNIGHT_ROLLOVER * MIDNIGHT_ROLLOVER_CHECK))
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#define MIDNIGHT_ROLLOVER_CHECK ( rollovercheck_last_timeofday != world.timeofday ? update_midnight_rollover() : midnight_rollovers )
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#define round_duration_in_ticks (round_start_time ? world.time - round_start_time : 0)
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#define station_time_in_ticks (roundstart_hour HOURS + round_duration_in_ticks)
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#define SIMPLE_SIGN(X) ((X) < 0 ? -1 : 1)
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