/// <summary>
/// If this edge is the edge(v0, v1)
/// </summary>
/// <param name="v0"></param>
/// <param name="v1"></param>
/// <returns>True if this edge's vertices are v0 & v1</returns>
public bool EqualEdge(DualSite v0, DualSite v1)
{
if ((Vertex0 == v0 && Vertex1 == v1) || (Vertex1 == v0 && Vertex0 == v1))
{
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Set the neighboring triangular faces (convex hull)
/// </summary>
/// <param name="neighbor">the neighboring triangular face</param>
/// <param name="v1">a vertex of the shared edge</param>
/// <param name="v2">the other vertex</param>
public void SetNeighbor(TriangularFace neighbor, DualSite v1, DualSite v2)
{
Edge edge1 = this.GetEdge(v1, v2);
if (edge1 != null)
{
edge1.SetFace(neighbor);
Edge edge2 = neighbor.GetEdge(v1, v2);
edge2.SetFace(this);
}
}
/// <summary>
/// If v is outside of the face (refer to normal vector)
/// </summary>
/// <param name="v">he vertex to be tested</param>
/// <returns>True if v is outside of the face (refer to normal vector) </returns>
public bool VOutFace(DualSite v)
{
if (Vector3D.DotProduct(Normal, v.Coordinate - Vertex0.Coordinate) > Eps)
{
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Repersents a triangular face in 3-D space
/// </summary>
/// <param name="v0">vertices in counter-clockwise order</param>
/// <param name="v1"></param>
/// <param name="v2"></param>
public TriangularFace(DualSite v0, DualSite v1, DualSite v2)
{
this.Vertex0 = v0;
this.Vertex1 = v1;
this.Vertex2 = v2;
this.Edge0 = new Edge(v0, v1);
this.Edge1 = new Edge(v1, v2);
this.Edge2 = new Edge(v2, v0);
this.Edge0.NextEdge = this.Edge1;
this.Edge1.NextEdge = this.Edge2;
this.Edge2.NextEdge = this.Edge0;
this.Normal = Vector3D.CrossProduct(v1.Coordinate - v0.Coordinate, v2.Coordinate - v0.Coordinate);
this.Normal.Normalize();
this.DualPoint = new Vector();
this.Valid = true;
}
/// <summary>
/// Get the edge of this face with vertices v1, v2
/// </summary>
/// <param name="v1">a vertex of the edge</param>
/// <param name="v2">the other vertex</param>
/// <returns>null if it cannot be found</returns>
public Edge GetEdge(DualSite v1, DualSite v2)
{
if (Edge0.EqualEdge(v1, v2))
{
return(Edge0);
}
else if (Edge1.EqualEdge(v1, v2))
{
return(Edge1);
}
else if (Edge2.EqualEdge(v1, v2))
{
return(Edge2);
}
else
{
return(null);
}
}
public Edge(DualSite v0, DualSite v1)
{
this.Vertex0 = v0;
this.Vertex1 = v1;
}