/// <summary>
/// Will return the new root (unchanged except in start-up)
/// </summary>
/// <summary>
/// Processes the data event.
/// </summary>
/// <returns>
/// The data event.
/// </returns>
/// <param name='e'>
/// E.
/// </param>
/// <param name='Root'>
/// Root.
/// </param>
/// <param name='VG'>
/// V.
/// </param>
/// <param name='ys'>
/// Ys.
/// </param>
/// <param name='CircleCheckList'>
/// Circle check list.
/// </param>
/// <exception cref='Exception'>
/// Represents errors that occur during application execution.
/// </exception>
public static VNode ProcessDataEvent(VDataEvent e, VNode Root, VoronoiGraph VG, double ys, out VDataNode[] CircleCheckList)
{
if (Root == null)
{
Root = new VDataNode(e.DataPoint);
CircleCheckList = new VDataNode[] { Root as VDataNode };
return(Root);
}
//1. Find the node to be replaced
VNode C = VNode.FindDataNode(Root, ys, e.DataPoint.X);
VDataNode cData = C as VDataNode;
if (cData == null)
{
throw new Exception("Can't cast to data node");
}
//2. Create the subtree (ONE Edge, but two VEdgeNodes)
VoronoiEdge VE = new VoronoiEdge();
VE.LeftData = cData.DataPoint;
VE.RightData = e.DataPoint;
VE.VVertexA = Fortune.VVUnkown;
VE.VVertexB = Fortune.VVUnkown;
VG.Edges.Add(VE);
VNode SubRoot;
if (Math.Abs(VE.LeftData.Y - VE.RightData.Y) < 1e-10)
{
if (VE.LeftData.X < VE.RightData.X)
{
SubRoot = new VEdgeNode(VE, false);
SubRoot.Left = new VDataNode(VE.LeftData);
SubRoot.Right = new VDataNode(VE.RightData);
}
else
{
SubRoot = new VEdgeNode(VE, true);
SubRoot.Left = new VDataNode(VE.RightData);
SubRoot.Right = new VDataNode(VE.LeftData);
}
CircleCheckList = new VDataNode[] { SubRoot.Left as VDataNode, SubRoot.Right as VDataNode };
}
else
{
SubRoot = new VEdgeNode(VE, false);
SubRoot.Left = new VDataNode(VE.LeftData);
SubRoot.Right = new VEdgeNode(VE, true);
SubRoot.Right.Left = new VDataNode(VE.RightData);
SubRoot.Right.Right = new VDataNode(VE.LeftData);
CircleCheckList = new VDataNode[] { SubRoot.Left as VDataNode, SubRoot.Right.Left as VDataNode, SubRoot.Right.Right as VDataNode };
}
//3. Apply subtree
if (C.Parent == null)
{
return(SubRoot);
}
C.Parent.Replace(C, SubRoot);
return(Root);
}
/// <summary>
/// Will return the new root (unchanged except in start-up)
/// </summary>
/// <summary>
/// Processes the data event.
/// </summary>
/// <returns>
/// The data event.
/// </returns>
/// <param name='e'>
/// E.
/// </param>
/// <param name='Root'>
/// Root.
/// </param>
/// <param name='VG'>
/// V.
/// </param>
/// <param name='ys'>
/// Ys.
/// </param>
/// <param name='CircleCheckList'>
/// Circle check list.
/// </param>
/// <exception cref='Exception'>
/// Represents errors that occur during application execution.
/// </exception>
public static VNode ProcessDataEvent( VDataEvent e, VNode Root, VoronoiGraph VG, double ys, out VDataNode[] CircleCheckList )
{
if( Root == null ) {
Root = new VDataNode( e.DataPoint );
CircleCheckList = new VDataNode[] {Root as VDataNode};
return Root;
}
//1. Find the node to be replaced
VNode C = VNode.FindDataNode( Root, ys, e.DataPoint.X );
VDataNode cData = C as VDataNode;
if( cData == null ) {
throw new Exception( "Can't cast to data node" );
}
//2. Create the subtree (ONE Edge, but two VEdgeNodes)
VoronoiEdge VE = new VoronoiEdge();
VE.LeftData = cData.DataPoint;
VE.RightData = e.DataPoint;
VE.VVertexA = Fortune.VVUnkown;
VE.VVertexB = Fortune.VVUnkown;
VG.Edges.Add( VE );
VNode SubRoot;
if( Math.Abs( VE.LeftData.Y - VE.RightData.Y ) < 1e-10 ) {
if( VE.LeftData.X < VE.RightData.X ) {
SubRoot = new VEdgeNode( VE, false );
SubRoot.Left = new VDataNode( VE.LeftData );
SubRoot.Right = new VDataNode( VE.RightData );
} else {
SubRoot = new VEdgeNode( VE, true );
SubRoot.Left = new VDataNode( VE.RightData );
SubRoot.Right = new VDataNode( VE.LeftData );
}
CircleCheckList = new VDataNode[] {SubRoot.Left as VDataNode, SubRoot.Right as VDataNode};
} else {
SubRoot = new VEdgeNode( VE, false );
SubRoot.Left = new VDataNode( VE.LeftData );
SubRoot.Right = new VEdgeNode( VE, true );
SubRoot.Right.Left = new VDataNode( VE.RightData );
SubRoot.Right.Right = new VDataNode( VE.LeftData );
CircleCheckList = new VDataNode[] {SubRoot.Left as VDataNode, SubRoot.Right.Left as VDataNode, SubRoot.Right.Right as VDataNode};
}
//3. Apply subtree
if( C.Parent == null ) {
return SubRoot;
}
C.Parent.Replace( C, SubRoot );
return Root;
}
