public static UEdge2i FromDirection(Vec2i origin, Directions_Ortho_2D direction)
{
if (direction.IsSingle() == false)
{
throw new System.Exception("direction is not single!");
}
else if (direction == Directions_Ortho_2D.None)
{
throw new System.Exception("direction is None!");
}
if (direction == Directions_Ortho_2D.U)
{
return(new UEdge2i(origin, origin.To_Up()));
}
if (direction == Directions_Ortho_2D.D)
{
return(new UEdge2i(origin, origin.To_Down()));
}
if (direction == Directions_Ortho_2D.L)
{
return(new UEdge2i(origin, origin.To_Left()));
}
if (direction == Directions_Ortho_2D.R)
{
return(new UEdge2i(origin, origin.To_Right()));
}
return(new UEdge2i());
}
