/// <summary>
/// Modifies a 2D vector to slide along this wall
/// Based on projection.
/// </summary>
/// <param name="Begin"></param>
/// <param name="End"></param>
/// <returns></returns>
public V2 SlideAlong(V2 Begin, V2 End)
{
V2 diff = End - Begin;
V2 projection = diff.GetProjection(GetP1P2());
return(Begin + projection);
}
