random.txt

来自「Lachesis an IRCRPG combat engine written」· 文本 代码 · 共 29 行

TF Random_Roll(unsigned long count, unsigned long magnitude, long floor,
               long **rolls);
	Uses the ISO C rand() function, which should be fine for ordinary
	dice rolls. count is the number of dice to roll, magnitude is the
	number of sides per die, floor is the smallest value on the die (may
	be nonpositive). rolls should have a length of count + 1, the result
	is stored here. rolls[0] contains the sum total of all rolls,
	rolls[1] through rolls[count] contain the results of individual
	die rolls.
	Note: Because we are using a random number up to a power of two and
	then dividing it to a suitable amount, there is an asymmetry whenever
	magnitude is not a power of two, making the highest value less likely
	to appear. We deal with this by dividing such that the highest value
	is one greater than we allow; if we get this value, we reroll. This
	does not occur if magnitude is a power of 2, since our 'excess'
	measure isn't rounded down. (excess = RAND_MAX / magnitude)
TF Random_WRoll(unsigned long count, unsigned long threshold, long **rolls);
	Random number generation is done along the same line as Random_Roll,
	but in this case we calculate 'successes' a la White Wolf games.
	10 is used as magnitude, 1 as floor, threshold is the minimum roll
	value that counts as a success and must be in the range from 2 to 10.
	rolls[0] contains a count of successes, 0 for failure, or a negative
	value for a botch. Other values in rolls are done the same way as
	Random_Roll. If WROLL_USES_SUCC_FLAG is defined, a negative value
	for rolls[0] will not occur unless no single roll was successful.
	(Revised Edition rules)

@(#) $Id: random.txt,v 1.1.1.1 2004/01/16 07:28:15 lachesis Exp $