#include "defs.h"


/* compute distance between two points in pinvec[]
 * ip can be off the lower end of pinvec
 * Lp can be off the higher end of pinvec
 */

distance(ip, Lp)
	DPIN ip, Lp;
{
	REG PIN j, k;
	REG r;
	INT sum;

	if (ip < &pinvec[0] || Lp >= &pinvec[npins]) 
		return(0);
	j = ip->pinp;
	k = Lp->pinp;
	r = j->x - k->x;
	sum = (r < 0)? -r : r;
	r = j->y - k->y;
	if (r < 0) return(sum - r);
	else return(sum + r);
}