Function path_get_h_cost

Source/path.cpp:92–102

* @brief heuristic, estimated cost from (sx,sy) to (dx,dy) */

 * @brief heuristic, estimated cost from (sx,sy) to (dx,dy)
 */
int path_get_h_cost(int sx, int sy, int dx, int dy)
{
	int delta_x = abs(sx - dx);
	int delta_y = abs(sy - dy);

	int min = delta_x < delta_y ? delta_x : delta_y;
	int max = delta_x > delta_y ? delta_x : delta_y;

	// see path_check_equal for why this is times 2
	return 2 * (min + max);
}

/**
 * @brief return 2 if pPath is horizontally/vertically aligned with (dx,dy), else 3