#include <math.h>

#include "hexagon.h"

#include "ctap.h"

#define EPS 0.00000001

int main(void) {
	int x, y;
	struct HL_hex start;
	struct HL_point center;
	double stride;

	stride = 1.5 / sqrt(3.0);

	plan(6);

	x = 0; y = 0;
	start = HL_hex_xy(x,y);
	center = HL_hexcenter(start);
	is_double(center.x, x * stride, EPS, "%d %d center X", x, y);
	is_double(center.y, 0.0, EPS, "%d %d center Y", x, y);

	x = 1; y = 1;
	start = HL_hex_xy(x,y);
	center = HL_hexcenter(start);
	is_double(center.x, x * stride, EPS, "%d %d center X", x, y);
	is_double(center.y, 0.5, EPS, "%d %d center Y", x, y);


	x = 2; y = 2;
	start = HL_hex_xy(x,y);
	center = HL_hexcenter(start);
	is_double(center.x, x * stride, EPS, "%d %d center X", x, y);
	is_double(center.y, 2.0, EPS, "%d %d center Y", x, y);

	return 0;
}