code/__DEFINES/math.dm

SIGN	Gets the sign of x, returns -1 if negative, 0 if 0, 1 if positive
WRAP_UP	Increments a value and wraps it if it exceeds some value. Can be used to circularly iterate through a list through `idx = WRAP_UP(idx, length_of_list)`.
TOBITSHIFT	Gets shift x that would be required the bitflag (1<<x) We need the round because log has floating-point inaccuracy, and if we undershoot at all on list indexing we'll get the wrong index.
SPT_PROB_RATE	Converts a probability/second chance to probability/seconds_per_tick chance For example, if you want an event to happen with a 10% per second chance, but your proc only runs every 5 seconds, do `if(prob(100*SPT_PROB_RATE(0.1, 5)))`
SPT_PROB	Like SPT_PROB_RATE but easier to use, simply put `if(SPT_PROB(10, 5))`
DIAMOND_AREA	The number of cells in a taxicab circle (rasterized diamond) of radius X.
randfloat	rand() but for floats, returns a random floating point number between L and H
IS_IN_BOUNDS	Tests if the value is in the given range.

Define Details

#define
DIAMOND_AREA
(X)

The number of cells in a taxicab circle (rasterized diamond) of radius X.

#define
IS_IN_BOUNDS
(val, lower, upper)

Tests if the value is in the given range.

#define
SIGN
(x)

Gets the sign of x, returns -1 if negative, 0 if 0, 1 if positive

#define
SPT_PROB
(prob_per_second_percent, seconds_per_tick)

Like SPT_PROB_RATE but easier to use, simply put if(SPT_PROB(10, 5))

#define
SPT_PROB_RATE
(prob_per_second, seconds_per_tick)

Converts a probability/second chance to probability/seconds_per_tick chance For example, if you want an event to happen with a 10% per second chance, but your proc only runs every 5 seconds, do if(prob(100*SPT_PROB_RATE(0.1, 5)))

#define
TOBITSHIFT
(bit)

Gets shift x that would be required the bitflag (1<<x) We need the round because log has floating-point inaccuracy, and if we undershoot at all on list indexing we'll get the wrong index.

#define
WRAP_UP
(val, max)

Increments a value and wraps it if it exceeds some value. Can be used to circularly iterate through a list through idx = WRAP_UP(idx, length_of_list).

#define
randfloat
(L, H)

rand() but for floats, returns a random floating point number between L and H

code/__DEFINES/math.dm

Define Details

#define DIAMOND_AREA(X)

#define IS_IN_BOUNDS(val, lower, upper)

#define SIGN(x)

#define SPT_PROB(prob_per_second_percent, seconds_per_tick)

#define SPT_PROB_RATE(prob_per_second, seconds_per_tick)

#define TOBITSHIFT(bit)

#define WRAP_UP(val, max)

#define randfloat(L, H)