interference/src/tools.c

#include "tools.h"
#include <math.h>
#include <stdlib.h>

int
sign(int x)
{
	return (x > 0) - (x < 0); /* from jtmm2 */
}

int
length(struct Vec2 *a, struct Vec2 *b)
{
	const int dist_x = abs(a->x - b->x);
	const int dist_y = abs(a->y - b->y);
	const float dist = sqrt(dist_x * dist_x + dist_y * dist_y);
	return dist;
}