/// <summary>
/// Adds a new intermediate piont to the wire
/// </summary>
/// <param name="point"></param>
public void AddIntermediatePoint(IPlanePosition point)
{
// If there are not enough coords to add intermediate points, throw an exception
if (DefiningPoints.Count < 2)
{
throw new Exception("Can't add an intermediate point to a wire with less than 2 coords");
}
// If the point that we add is already a construction point return
if (ConstructionPoints.FirstOrDefault((position) => position.Equals(point)) != null)
{
return;
}
// If the point is not included in the wire as a construction point but it does lie on the wire
if (FindPrecidingConstructionPoint(point, out int index))
{
// Add it to the wire's construction points
_ConstructionPoints.Insert(index + 1, point);
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(ConstructionPoints)));
return;
}
// Otherwise signal error
throw new Exception("The given position doesn't lie on the wire");
}
/// <summary>
/// Adds a point to the beginning of the wire, adds necessary points to <see cref="_ConstructionPoints"/>
/// </summary>
/// <param name="point"></param>
private void AddPointAtBeginning(IPlanePosition point)
{
_DefiningPoints.Insert(0, point);
if (_ConstructionPoints.Count > 0)
{
_ConstructionPoints.Insert(0, new PlanePosition(point.X, _ConstructionPoints[0].Y));
}
_ConstructionPoints.Insert(0, point);
}
/// <summary>
/// Adds a point to the end of the wire, adds necessary points to <see cref="_ConstructionPoints"/>
/// </summary>
/// <param name="point"></param>
private void AddPointAtEnd(IPlanePosition point)
{
_DefiningPoints.Add(point);
if (_ConstructionPoints.Count > 0)
{
_ConstructionPoints.Add(new PlanePosition(point.X, _ConstructionPoints[_ConstructionPoints.Count - 1].Y));
}
_ConstructionPoints.Add(point);
}
/// <summary>
/// Adds a new point to the wire at beginning/end
/// </summary>
/// <param name="point"></param>
public void AddPoint(IPlanePosition point, bool addAtEnd = true)
{
if (addAtEnd)
{
AddPointAtEnd(point);
}
else
{
AddPointAtBeginning(point);
}
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(ConstructionPoints)));
}
/// <summary>
/// Returns true if the point given by <paramref name="position"/> belongs to wire but is not in construction points yet,
/// assigns the index of its preceding construction point to <paramref name="index"/>. If the point doesn't belong to wire
/// returns false and assigns -1 to <paramref name="index"/>
/// </summary>
/// <param name="position"></param>
/// <param name="index"></param>
/// <returns></returns>
private bool FindPrecidingConstructionPoint(IPlanePosition position, out int index)
{
for (int i = 0; i < ConstructionPoints.Count - 1; ++i)
{
// If the point lies on the line between two subsequent points
if ((ConstructionPoints[i].X == position.X && ConstructionPoints[i + 1].X == position.X &&
(position.Y - ConstructionPoints[i].Y) * (position.Y - ConstructionPoints[i + 1].Y) < 0) ||
(ConstructionPoints[i].Y == position.Y && ConstructionPoints[i + 1].Y == position.Y &&
(position.X - ConstructionPoints[i].X) * (position.X - ConstructionPoints[i + 1].X) < 0))
{
index = i;
return(true);
}
}
index = -1;
return(false);
}
/// <summary>
/// Constructor taking an <see cref="IPlanePosition"/>
/// </summary>
/// <param name="position"></param>
public Node(IPlanePosition position)
{
Position = position;
}
/// <summary> /// Default constructor taking position of the terminal as a parameter /// </summary> public Terminal(IPlanePosition position) => Position = position;
/// <summary> /// Returns true if point given by <paramref name="position"/> belongs to this wire /// </summary> /// <param name="position"></param> /// <returns></returns> public bool BelongsToWire(IPlanePosition position) => FindPrecidingConstructionPoint(position, out var dummy) || ConstructionPoints.FirstOrDefault((constructionPoint) => position.Equals(constructionPoint)) != null;
