Function GetDirection

Source/engine.cpp:858–897

* @brief Calculate the best fit direction between two points * @param x1 Tile coordinate * @param y1 Tile coordinate * @param x2 Tile coordinate * @param y2 Tile coordinate * @return A value from the direction enum */

 * @return A value from the direction enum
 */
int GetDirection(int x1, int y1, int x2, int y2)
{
	int mx, my;
	int md, ny;

	mx = x2 - x1;
	my = y2 - y1;

	if (mx >= 0) {
		if (my >= 0) {
			md = DIR_S;
			if (2 * mx < my)
				md = DIR_SW;
		} else {
			my = -my;
			md = DIR_E;
			if (2 * mx < my)
				md = DIR_NE;
		}
		if (2 * my < mx)
			return DIR_SE;
	} else {
		if (my >= 0) {
			ny = -mx;
			md = DIR_W;
			if (2 * ny < my)
				md = DIR_SW;
		} else {
			ny = -mx;
			my = -my;
			md = DIR_N;
			if (2 * ny < my)
				md = DIR_NE;
		}
		if (2 * my < ny)
			return DIR_NW;
	}

	return md;
}

/**
 * @brief Set the RNG seed