/// <summary>
/// Exhaustive search to update neighbor pointers
/// </summary>
public void MarkNeighbor(DelaunayTriangle t)
{
if (t.Contains(Points[1], Points[2]))
{
Neighbors[0] = t;
t.MarkNeighbor(Points[1], Points[2], this);
}
else if (t.Contains(Points[0], Points[2]))
{
Neighbors[1] = t;
t.MarkNeighbor(Points[0], Points[2], this);
}
else if (t.Contains(Points[0], Points[1]))
{
Neighbors[2] = t;
t.MarkNeighbor(Points[0], Points[1], this);
}
else
{
Debug.WriteLine("markNeighbor failed");
}
}
private static AdvancingFrontNode NewFrontTriangle(DTSweepContext tcx, TriangulationPoint point, AdvancingFrontNode node)
{
DelaunayTriangle delaunayTriangle = new DelaunayTriangle(point, node.Point, node.Next.Point);
delaunayTriangle.MarkNeighbor(node.Triangle);
tcx.Triangles.Add(delaunayTriangle);
AdvancingFrontNode advancingFrontNode = new AdvancingFrontNode(point);
advancingFrontNode.Next = node.Next;
advancingFrontNode.Prev = node;
node.Next.Prev = advancingFrontNode;
node.Next = advancingFrontNode;
tcx.AddNode(advancingFrontNode);
bool flag = !DTSweep.Legalize(tcx, delaunayTriangle);
if (flag)
{
tcx.MapTriangleToNodes(delaunayTriangle);
}
return(advancingFrontNode);
}
/// <summary>
/// Creates a new front triangle and legalize it
/// </summary>
private static AdvancingFrontNode NewFrontTriangle(DTSweepContext tcx, TriangulationPoint point, AdvancingFrontNode node)
{
DelaunayTriangle triangle = new DelaunayTriangle(point, node.Point, node.Next.Point);
triangle.MarkNeighbor(node.Triangle);
tcx.Triangles.Add(triangle);
AdvancingFrontNode newNode = new AdvancingFrontNode(point);
newNode.Next = node.Next;
newNode.Prev = node;
node.Next.Prev = newNode;
node.Next = newNode;
tcx.AddNode(newNode); // XXX: BST
if (!Legalize(tcx, triangle))
{
tcx.MapTriangleToNodes(triangle);
}
return(newNode);
}