public int Compare(object x, object y)
{
VertexRecord v1 = (VertexRecord)x;
VertexRecord v2 = (VertexRecord)y;
if (v1.Order < v2.Order)
{
return(-1);
}
if (v1.Order > v2.Order)
{
return(1);
}
// v1.Order equals v2.Order. If these orders are > 0, they won't get
// added to the sorted list anyhow, so we'll pretend they're equivalent,
// and return 0. Otherwise, if the nodes' orders are zero, we'll
// consider the secondary sort criteria.
if (v1.Order > 0)
{
return(0);
}
try {
return(v1.Underlying.SortCriteria.CompareTo(v2.Underlying.SortCriteria));
} catch (Exception ex) {
_Debug.WriteLine(ex.Message);
return(0);
}
}
private ArrayList BubbleSort(ArrayList list)
{
// We know that anything out of sequence is only one "bin" off. So as we move down the array, we track the last place
// that the count incremented.
VertexRecord[] va = (VertexRecord[])list.ToArray(typeof(VertexRecord));
int lastStepUp = -1;
int lastOrder = -1;
for (int i = 0; i < va.Length; i++)
{
int thisOrder = va[i].Order;
if (thisOrder > lastOrder)
{
lastStepUp = i;
}
if (thisOrder < lastOrder)
{
VertexRecord tmp = va[lastStepUp];
va[lastStepUp] = va[i];
va[i] = tmp;
lastStepUp++;
}
lastOrder = va[i].Order;
}
return(new ArrayList(va));
}
internal void DecrementParentsChildCount(Hashtable otherVertices)
{
foreach (IDependencyVertex idv in m_underlying.PredecessorList)
{
VertexRecord v = (VertexRecord)otherVertices[idv];
v.Order--;
}
}
internal void EstablishChildRelationships(Hashtable otherVertices)
{
foreach (IDependencyVertex idv in m_underlying.PredecessorList)
{
VertexRecord v = (VertexRecord)otherVertices[idv];
v.Order++;
}
}
private void Simplify()
{
Program.PrintText("Simplification");
int vn = mesh.VertexCount;
// if (vn <= targetVertices) return;
int nextLevel = (int)(vn * simplificationRatio);
if (nextLevel < targetVertices)
{
nextLevel = targetVertices;
}
// copy connectivity
// VertexRecord[] vRec = new VertexRecord[vn];
EdgeRecord[] edgeRec = CreateEdgeCollapseRecords();
List <EdgeRecord> collapseRec = new List <EdgeRecord>();
bool[] collapsed = new bool[vn];
PriorityQueue queue = new PriorityQueue(vn);
for (int i = 0; i < vn; i++)
{
queue.Insert(edgeRec[i]);
collapsed[i] = false;
}
{
Program.PrintText("output mesh level: " + vn);
List <VertexRecord> vRecList = new List <VertexRecord>();
for (int j = 0; j < vn; j++)
{
if (collapsed[j])
{
continue;
}
VertexRecord r = new VertexRecord(j);
foreach (int adj in edgeRec[j].adjV)
{
r.adjV.Add(adj);
}
vRecList.Add(r);
}
simplifiedMeshes.Add(vRecList);
collapseRec.Reverse();
collapsedRecords.Add(collapseRec);
faceRecords.Add((int[])mesh.FaceIndex.Clone());
collapseRec = new List <EdgeRecord>();
}
int count = vn;
for (int i = 0; i < vn - targetVertices; i++)
{
EdgeRecord rec1 = (EdgeRecord)queue.DeleteMin();
EdgeRecord rec2 = edgeRec[rec1.minIndex];
rec2.area += rec1.area;
collapseRec.Add(rec1);
collapsed[rec1.vIndex] = true;
count--;
foreach (int j in rec1.adjV)
{
edgeRec[j].adjV.Remove(rec1.vIndex);
if (j != rec2.vIndex)
{
edgeRec[j].adjV.Add(rec2.vIndex);
edgeRec[rec2.vIndex].adjV.Add(j);
}
}
foreach (int j in rec2.adjV)
{
UpdateEdgeCollapseRecords(queue, edgeRec, j);
}
UpdateEdgeCollapseRecords(queue, edgeRec, rec2.vIndex);
if (count == nextLevel)
{
Program.PrintText("output mesh level: " + count);
List <VertexRecord> vRecList = new List <VertexRecord>();
for (int j = 0; j < vn; j++)
{
if (collapsed[j])
{
continue;
}
VertexRecord r = new VertexRecord(j);
foreach (int adj in edgeRec[j].adjV)
{
r.adjV.Add(adj);
}
vRecList.Add(r);
}
simplifiedMeshes.Add(vRecList);
int[] fr = BuildCollapsedFaceIndex(faceRecords[faceRecords.Count - 1], collapseRec);
faceRecords.Add(fr);
collapseRec.Reverse();
collapsedRecords.Add(collapseRec);
collapseRec = new List <EdgeRecord>();
nextLevel = (int)(nextLevel * simplificationRatio);
if (nextLevel < targetVertices)
{
nextLevel = targetVertices;
}
}
}
simplifiedMeshes.Reverse();
collapsedRecords.Reverse();
faceRecords.Reverse();
}
/// <summary>
/// Recalculates the service sequence.
/// </summary>
protected void RecalculateServiceSequence()
{
m_serviceSequenceList = new ArrayList();
// First we create the list of vertex data and a hashtable to find
// the vertex from the underlying.
ArrayList lstVerts = new ArrayList();
Hashtable htVerts = new Hashtable();
//_Debug.WriteLine("Calculating Service Sequence.");
foreach (IDependencyVertex idv in m_vertices)
{
VertexRecord v = new VertexRecord(idv);
if (s_diagnostics)
{
_Debug.WriteLine("Parents of " + v.Underlying);
foreach (IDependencyVertex idv2 in v.Underlying.PredecessorList)
{
_Debug.WriteLine("\t" + idv2);
}
}
lstVerts.Add(v);
htVerts.Add(idv, v);
if (s_diagnostics)
{
_Debug.WriteLine(String.Format("New vertex, {0} with {1} dependents.", idv, idv.PredecessorList.Count));
}
}
// Each underlying knows who it depends on - we need each vertex to
// know, rather, who depends on IT.
foreach (VertexRecord v in lstVerts)
{
v.EstablishChildRelationships(htVerts);
}
try {
bool bResortNeeded = true;
int numAffectedLastAdjustment = lstVerts.Count;
// We will repeat the following until all nodes have been evaluated.
while (lstVerts.Count > 0)
{
//if ( lstVerts.Count%100 == 0 ) Console.WriteLine("%%%" + lstVerts.Count);
// Sort remaining vertices by the provided Comparer. (defaults to
// sorting first by nOrder, then by the vertices' provided comparator.
// See below for an explanation of the 'bResortNeeded' boolean.
if (bResortNeeded)
{
if (numAffectedLastAdjustment > lstVerts.Count * 0.02)
{
lstVerts.Sort(GetVertexComparer());
}
else
{
lstVerts = BubbleSort(lstVerts);
}
}
// Dumps the sort order as it progresses...
//foreach ( Vertex v in lstVerts ) _Debug.WriteLine(v.Underlying + " : " + v.Order);
// Move the least vertex to the ServiceOrder list.
VertexRecord next = (VertexRecord)lstVerts[0];
lstVerts.RemoveAt(0);
m_serviceSequenceList.Add(next.Underlying);
// If the vertex we just removed had no parents, then the sort order
// that was valid in the preceding step is still valid. Nobody had
// their child-count reduced, so no one's position in the sort will
// have had a reason to change. We just move on to the next one...
numAffectedLastAdjustment = next.Underlying.PredecessorList.Count;
bResortNeeded = (numAffectedLastAdjustment > 0);
if (next.Order != 0)
{
IDependencyVertex root = next.Underlying;
ArrayList members = new ArrayList();
members.Add(root);
Stack stack = new Stack();
foreach (IDependencyVertex parent in root.PredecessorList)
{
if (!FindCycle(root, parent, ref members, ref stack))
{
break;
}
}
throw new GraphCycleException(members);
}
// Decrement the Order of all vertices that this one depended on.
next.DecrementParentsChildCount(htVerts);
}
} catch (StackOverflowException soe) {
throw new ApplicationException("The GraphSequencer has detected a probable dependency cycle in the initialization sequence of this model. For details, set the GraphSequencer.StackCheck key to true in the modeler's app.config file.", soe);
}
#region Diagnostics
if (s_diagnostics)
{
_Debug.WriteLine("Dependency Solver determines sequence to be:");
foreach (IDependencyVertex idv in m_serviceSequenceList)
{
_Debug.WriteLine("\t" + idv);
}
}
#endregion Diagnostics
}
