/// <summary>
/// Adds an area / polygon to the mapdata in <see cref="graph"/>.
/// It is saved according to <see cref="IGraph.AddArea(List{Vector2}, bool)"/>.
/// </summary>
/// <param name="corner">List of points that are the corners of the polygon.</param>
/// <param name="isObstacle">true of the polygon should be treaded as an obstacle, otherwise false.</param>
public void AddArea(List <Vector2> corner, bool isObstacle)
{
graph.AddArea(corner, isObstacle);
}