public RoadNode(int thickness, InnerDirection flowDirection, InnerDirection crossDirection, Point position)
{
Thickness = thickness;
FlowDirection = flowDirection;
CrossDirection = crossDirection;
Position = position;
}
/// <summary>
/// Gets the dir.
/// </summary>
/// <param name="dir">The dir.</param>
/// <param name="n">The n.</param>
/// <returns></returns>
private static InnerDirection GetDirection(this InnerDirection dir, int n)
{
var v = (int)dir + n;
if (v < 0)
{
v += dirLength;
}
else if (v >= dirLength)
{
v -= dirLength;
}
return((InnerDirection)v);
}
/// <summary>
/// Gets the point.
/// </summary>
/// <param name="dir">The dir.</param>
/// <returns>Point.</returns>
public Point GetInnerPoint(InnerDirection dir)
{
switch (dir)
{
case InnerDirection.up:
return(up);
case InnerDirection.right:
return(right);
case InnerDirection.down:
return(down);
case InnerDirection.left:
return(left);
}
return(zero);
}
/// <summary>
/// Gets the inverse.
/// </summary>
/// <param name="dir">The dir.</param>
/// <param name="inverse">if set to <c>true</c> [inverse].</param>
/// <returns></returns>
public static InnerDirection GetInverse(this InnerDirection dir, bool inverse = false)
{
// down ==> up
// right ==> left
return(GetDirection(dir, inverse ? -2 : 2));
}
/// <summary>
/// Gets the perpendicular.
/// </summary>
/// <param name="dir">The dir.</param>
/// <returns>Direction.</returns>
public static InnerDirection GetPerpendicular(this InnerDirection dir, bool inverse = false)
{
// left ==> up
// down ==> left ...
return(GetDirection(dir, inverse ? -1 : 1));
}
/// <summary>
/// Nexts the direction.
/// </summary>
/// <param name="lastDirection">The last direction.</param>
/// <returns></returns>
public Point NextDirection(ref InnerDirection lastDirection)
{
lastDirection = lastDirection.GetPerpendicular();
return(GetInnerPoint(lastDirection));
}
/// <summary>
/// News the position.
/// </summary>
/// <param name="dir">The dir.</param>
/// <returns>Point.</returns>
public Point NewInnerPos(InnerDirection dir)
{
return(this + GetInnerPoint(dir));
}
private Direction(InnerDirection direction)
{
this.direction = direction;
}
private Direction(uint dir)
{
this.direction = (InnerDirection)dir;
}
