/* util.h - Don Yang (uguu.org)

   06/07/03
                                                                           */

#ifndef UTIL_H__
#define UTIL_H__


#define Random(min, max)      \
   (((double)(rand() & 4095) / 4095.0) * ((max) - (min)) + (min))

void Cross(double ax, double ay, double az,
           double bx, double by, double bz,
           /*@out@*/double *ox, /*@out@*/double *oy, /*@out@*/double *oz);
void Normalize(double *x, double *y, double *z, double unit);
void RotatePoint(double theta, double phi, double *x, double *y, double *z);


#endif