Difference between revisions of "Random Numbers"
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m (I supposed we should specify our constants...) |
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Latest revision as of 03:53, 30 November 2005
SubSpace uses random numbers primarily in its encryption, generating prizes, and controlling doors.
The following code is used in generating the encrypted keystream, prizes, and doors:
#define MULT_C 0x834E0B5F #define DIV_C 0x1F31D DWORD SS_RNG(DWORD seed) { DWORD nseed, temp; temp = (MULT_C * (unsigned __int64)seed) >> 32; temp = (temp >> 16) + (temp >> 31); //aka the sign bit nseed = (seed % DIV_C) * 16807; nseed -= (temp * 2836); nseed += 123; if (!nseed || nseed > 0x7FFFFFFF) nseed += 0x7FFFFFFF; return nseed; }