Exemple #1
0
        public static VNode ProcessCircleEvent(VCircleEvent e, VNode root, VoronoiGraph vg, out VDataNode[] circleCheckList)
        {
            VEdgeNode eo;
            VDataNode b = e.NodeN;
            VDataNode a = LeftDataNode(b);
            VDataNode c = RightDataNode(b);
            if (a == null || b.Parent == null || c == null || !a.DataPoint.Equals(e.NodeL.DataPoint) || !c.DataPoint.Equals(e.NodeR.DataPoint))
            {
                circleCheckList = new VDataNode[] { };
                return root; // Abbruch da sich der Graph verändert hat
            }
            VEdgeNode eu = (VEdgeNode)b.Parent;
            circleCheckList = new[] { a, c };
            //1. Create the new Vertex
            Vector2 vNew = new Vector2(e.Center.X, e.Center.Y);
            //			VNew[0] = Fortune.ParabolicCut(a.DataPoint[0],a.DataPoint[1],c.DataPoint[0],c.DataPoint[1],ys);
            //			VNew[1] = (ys + a.DataPoint[1])/2 - 1/(2*(ys-a.DataPoint[1]))*(VNew[0]-a.DataPoint[0])*(VNew[0]-a.DataPoint[0]);
            vg.Vertices.Add(vNew);
            //2. Find out if a or c are in a distand part of the tree (the other is then b's sibling) and assign the new vertex
            if (eu.Left == b) // c is sibling
            {
                eo = EdgeToRightDataNode(a);

                // replace eu by eu's Right
                eu.Parent.Replace(eu, eu.Right);
            }
            else // a is sibling
            {
                eo = EdgeToRightDataNode(b);

                // replace eu by eu's Left
                eu.Parent.Replace(eu, eu.Left);
            }
            eu.Edge.AddVertex(vNew);
            //			///////////////////// uncertain
            //			if(eo==eu)
            //				return root;
            //			/////////////////////
            eo.Edge.AddVertex(vNew);
            //2. Replace eo by new Edge
            VoronoiEdge ve = new VoronoiEdge();
            ve.LeftData = a.DataPoint;
            ve.RightData = c.DataPoint;
            ve.AddVertex(vNew);
            vg.Edges.Add(ve);

            VEdgeNode ven = new VEdgeNode(ve, false);
            ven.Left = eo.Left;
            ven.Right = eo.Right;
            if (eo.Parent == null)
                return ven;
            eo.Parent.Replace(eo, ven);
            return root;
        }
Exemple #2
0
 public VEdgeNode(VoronoiEdge e, bool flipped)
 {
     Edge = e;
     Flipped = flipped;
 }
Exemple #3
0
        /// <summary>
        /// Will return the new root (unchanged except in start-up)
        /// </summary>
        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 };
                return root;
            }
            //1. Find the node to be replaced
            VNode c = FindDataNode(root, ys, e.DataPoint.X);
            //2. Create the subtree (ONE Edge, but two VEdgeNodes)
            VoronoiEdge ve = new VoronoiEdge();
            ve.LeftData = ((VDataNode)c).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, (VDataNode)subRoot.Right };
            }
            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, (VDataNode)subRoot.Right.Left, (VDataNode)subRoot.Right.Right };
            }

            //3. Apply subtree
            if (c.Parent == null)
                return subRoot;
            c.Parent.Replace(c, subRoot);
            return root;
        }