/// <summary> /// Does one iterations in which a miniminum spanning tree is /// determined on the delaunay triangulation and finally the tree is exanded to resolve the overlaps. /// </summary> /// <param name="nodePositions"></param> /// <param name="nodeSizes"></param> /// <param name="scanlinePhase"></param> /// <returns></returns> bool OneIteration(Point[] nodePositions, Size[] nodeSizes, bool scanlinePhase) { var cdt = new Cdt(nodePositions.Select((p, index) => Tuple.Create(p, (object) index))); cdt.Run(); var siteIndex = new Dictionary<CdtSite, int>(); for (int i = 0; i < nodePositions.Length; i++) siteIndex[cdt.PointsToSites[nodePositions[i]]] = i; int numCrossings = 0; List<Tuple<int, int, double, double, double>> proximityEdges = new List<Tuple<int, int, double, double, double>>(); foreach (var site in cdt.PointsToSites.Values) foreach (var edge in site.Edges) { Point point1 = edge.upperSite.Point; Point point2 = edge.lowerSite.Point; var nodeId1 = siteIndex[edge.upperSite]; var nodeId2 = siteIndex[edge.lowerSite]; Debug.Assert(ApproximateComparer.Close(point1, nodePositions[nodeId1])); Debug.Assert(ApproximateComparer.Close(point2, nodePositions[nodeId2])); var tuple = GetIdealEdgeLength(nodeId1, nodeId2, point1, point2, nodeSizes, _overlapForLayers); proximityEdges.Add(tuple); if (tuple.Item3 > 1) numCrossings++; } if (numCrossings == 0 || scanlinePhase) { int additionalCrossings = FindProximityEdgesWithSweepLine(proximityEdges, nodeSizes, nodePositions); if (numCrossings == 0 && additionalCrossings == 0) { // if(nodeSizes.Length>100) // ShowAndMoveBoxesRemoveLater(null, proximityEdges, nodeSizes, nodePositions, -1); return false; } if (numCrossings == 0 && !scanlinePhase) return false; } var treeEdges = MstOnDelaunayTriangulation.GetMstOnTuple(proximityEdges, nodePositions.Length); int rootId = treeEdges.First().Item1; // if (nodeSizes.Length > 100) // ShowAndMoveBoxesRemoveLater(treeEdges, proximityEdges, nodeSizes, nodePositions, rootId); MoveNodePositions(treeEdges, nodePositions, rootId); return true; }