I was wondering if anyone had a good macro or inline function for randomizing a floating point number. Like for numbers between 0.0f and 1.0f or 0.0f and -1.0f. [edited by - tylerbingham on September 5, 2002 4:51:03 PM]

You could use: (float) rand() / (float) RAND_MAX

I use this for my particle engine :

float speed[]={0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9};//and so on..
//and also use this :
srand(GetTickCount());
or
#include <time.h>
srand((unsigned)time(NULL));
Particle.life=speed[rand()%9];//since they are 9 numbers...

Plenty of random number generators and distribution functions there.

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