private void FindTerminusForSequence(ref IGSForwardStar FwdStar, int StartNodeId,
ref int TerminusPoint, int iInfinityChecker)
{
if (TerminusPoint > -1)
{
return;
}
//iInfinityChecker++;
if (iInfinityChecker++ > 5000)
{
return;
}
ILongArray iLngArr = FwdStar.get_ToNodes(StartNodeId);
int iCnt2 = 0;
iCnt2 = iLngArr.Count;
IGSLine pGSLine = null;
for (int i = 0; i < iCnt2; i++)
{
int i2 = iLngArr.get_Element(i);
bool bIsReversed = FwdStar.GetLine(StartNodeId, i2, ref pGSLine);
if (iCnt2 == 1) //this is a terminus/end-line
{
TerminusPoint = StartNodeId;
}
FindTerminusForSequence(ref FwdStar, i2, ref TerminusPoint, iInfinityChecker);
}
}
private bool TraceLines(ref IGSForwardStar FwdStar, int StartNodeId, ref int BranchCount,
ref int TracedLinesCount, ref int LoopCount, ref int TerminusCount, ref List<string> FromToLine,
ref List<int> FromList, ref List<int> ToList, int iInfinityChecker)
{
iInfinityChecker++;
if (iInfinityChecker > 5000)
return false;
//(This is a self-calling function.) In this context 5000 downstream lines is like infinity,
//so exit gracefully, and avoid probable endless loop.
//Possible cause of endless loop? Corrupted data; example, a line with the same from and to point id
IVector3D vect = new Vector3DClass();
try
{
ILongArray iLngArr = FwdStar.get_ToNodes(StartNodeId);
//get_ToNodes returns an array of radiated points, not "TO" points in the fabric data model sense
int iCnt2 = 0;
iCnt2 = iLngArr.Count;
if (iCnt2 == 1)
TerminusCount++;
IGSLine pGSLine = null;
for (int i = 0; i < iCnt2; i++)
{
int i2 = iLngArr.get_Element(i);
string sFromTo = StartNodeId.ToString() + "," + i2.ToString();
string sToFrom = i2.ToString() + "," + StartNodeId.ToString();
if (FromToLine.Contains(sFromTo) || FromToLine.Contains(sToFrom))
{
if (FromToLine.Contains(sFromTo))
LoopCount++;
continue;
}
if (iCnt2 > 2)
BranchCount++;
TracedLinesCount++;
FromToLine.Add(StartNodeId.ToString() + "," + i2.ToString());
bool bIsReversed = FwdStar.GetLine(StartNodeId, i2, ref pGSLine);
if (bIsReversed)
{
FromList.Add(-StartNodeId);
ToList.Add(-i2);
vect.PolarSet(pGSLine.Bearing + Math.PI, 0, pGSLine.Distance); //Azimuth of IVector3D is north azimuth radians zero degrees north
}
else
{
FromList.Add(StartNodeId);
ToList.Add(i2);
vect.PolarSet(pGSLine.Bearing, 0, pGSLine.Distance); //Azimuth of IVector3D is north azimuth radians zero degrees north
}
if (!TraceLines(ref FwdStar, i2, ref BranchCount, ref TracedLinesCount,ref LoopCount, ref TerminusCount,
ref FromToLine,ref FromList, ref ToList, iInfinityChecker))
return false;
}
return true;
}
catch
{
return false;
}
}
private bool TraceLines(ref IGSForwardStar FwdStar, int StartNodeId, ref int BranchCount,
ref int TracedLinesCount, ref int LoopCount, ref int TerminusCount, ref List <string> FromToLine,
ref List <int> FromList, ref List <int> ToList, int iInfinityChecker)
{
iInfinityChecker++;
if (iInfinityChecker > 5000)
{
return(false);
}
//(This is a self-calling function.) In this context 5000 downstream lines is like infinity,
//so exit gracefully, and avoid probable endless loop.
//Possible cause of endless loop? Corrupted data; example, a line with the same from and to point id
IVector3D vect = new Vector3DClass();
try
{
ILongArray iLngArr = FwdStar.get_ToNodes(StartNodeId);
//get_ToNodes returns an array of radiated points, not "TO" points in the fabric data model sense
int iCnt2 = 0;
iCnt2 = iLngArr.Count;
if (iCnt2 == 1)
{
TerminusCount++;
}
IGSLine pGSLine = null;
for (int i = 0; i < iCnt2; i++)
{
int i2 = iLngArr.get_Element(i);
string sFromTo = StartNodeId.ToString() + "," + i2.ToString();
string sToFrom = i2.ToString() + "," + StartNodeId.ToString();
if (FromToLine.Contains(sFromTo) || FromToLine.Contains(sToFrom))
{
if (FromToLine.Contains(sFromTo))
{
LoopCount++;
}
continue;
}
if (iCnt2 > 2)
{
BranchCount++;
}
TracedLinesCount++;
FromToLine.Add(StartNodeId.ToString() + "," + i2.ToString());
bool bIsReversed = FwdStar.GetLine(StartNodeId, i2, ref pGSLine);
if (bIsReversed)
{
FromList.Add(-StartNodeId);
ToList.Add(-i2);
vect.PolarSet(pGSLine.Bearing + Math.PI, 0, pGSLine.Distance); //Azimuth of IVector3D is north azimuth radians zero degrees north
}
else
{
FromList.Add(StartNodeId);
ToList.Add(i2);
vect.PolarSet(pGSLine.Bearing, 0, pGSLine.Distance); //Azimuth of IVector3D is north azimuth radians zero degrees north
}
if (!TraceLines(ref FwdStar, i2, ref BranchCount, ref TracedLinesCount, ref LoopCount, ref TerminusCount,
ref FromToLine, ref FromList, ref ToList, iInfinityChecker))
{
return(false);
}
}
return(true);
}
catch
{
return(false);
}
}
private void FindTerminusForSequence(ref IGSForwardStar FwdStar, int StartNodeId,
ref int TerminusPoint, int iInfinityChecker)
{
if (TerminusPoint > -1)
return;
//iInfinityChecker++;
if (iInfinityChecker++ > 5000)
return;
ILongArray iLngArr = FwdStar.get_ToNodes(StartNodeId);
int iCnt2 = 0;
iCnt2 = iLngArr.Count;
IGSLine pGSLine = null;
for (int i = 0; i < iCnt2; i++)
{
int i2 = iLngArr.get_Element(i);
bool bIsReversed = FwdStar.GetLine(StartNodeId, i2, ref pGSLine);
if (iCnt2 == 1) //this is a terminus/end-line
TerminusPoint = StartNodeId;
FindTerminusForSequence(ref FwdStar, i2, ref TerminusPoint, iInfinityChecker);
}
}