/********************************/
/*	fastradius		*/
/*				*/
/*	Fast radius lookup	*/
/********************************/
#include "misc.h"
#define		MAX	20

static float    r[MAX][MAX];

setr () {
    int     i, j;

    for (i = 0; i < MAX; i++)
	for (j = 0; j <= i; j++) {
	    r[i][j] = r[j][i] = sqrt ((float) (i * i + j * j));
	}
}

float
        fastr (x, y)
int     x, y;
{
    register int    i, j;

    i = abs (x);
    j = abs (y);
    if ((i < MAX) && (j < MAX))
	return (r[i][j]);
    return (sqrt ((float) (i * i + j * j)));
}