Fast C++ Code Library

satchmo

I found this code on a Korean site last night. Seems like some very handy stuff (especially for graphics/games - see the Quake 3 reciprocal square root below, mmm...) - although I haven't actually used any of these yet, so use at your own risk.

(It's too big to post up here... FastCodeLibrary.h)

Example:
[PHP]// Fast reciprocal square root (Quake 3 game code)
__inline float RSqrt(float number)
{
long i;
float x2, y;
const float threehalfs = 1.5f;

x2 = number * 0.5f;
y = number;
i = * (long *) &y; // evil floating point bit level hacking
i = 0x5f3759df - (i >> 1); // what the f*ck?
y = * (float *) &i;
y = y * (threehalfs - (x2 * y * y)); // 1st iteration

return y;
}[/PHP]

Mr.StRiPe

Nice one keith I was actuall looking for code like that. Hows the postgrad going?

satchmo

It's goin great except for Charlie 'Fuckwit' McCreevy cutting practically the whole project equipment budget for the next year, along with a number of other projects. How the hell am I meant to build a CAVE with no bloody equipment, eh?!