namespace TriangleNet.Topology.DCEL
{
	public class HalfEdge
	{
		internal int id;

		internal int mark;

		internal Vertex origin;

		internal Face face;

		internal HalfEdge twin;

		internal HalfEdge next;

		public int ID
		{
			get
			{
				return id;
			}
			set
			{
				id = value;
			}
		}

		public int Boundary
		{
			get
			{
				return mark;
			}
			set
			{
				mark = value;
			}
		}

		public Vertex Origin
		{
			get
			{
				return origin;
			}
			set
			{
				origin = value;
			}
		}

		public Face Face
		{
			get
			{
				return face;
			}
			set
			{
				face = value;
			}
		}

		public HalfEdge Twin
		{
			get
			{
				return twin;
			}
			set
			{
				twin = value;
			}
		}

		public HalfEdge Next
		{
			get
			{
				return next;
			}
			set
			{
				next = value;
			}
		}

		public HalfEdge(Vertex origin)
		{
			this.origin = origin;
		}

		public HalfEdge(Vertex origin, Face face)
		{
			this.origin = origin;
			this.face = face;
			if (face != null && face.edge == null)
			{
				face.edge = this;
			}
		}

		public override string ToString()
		{
			return $"HE-ID {id} (Origin = VID-{origin.id})";
		}
	}
}