private void ExpandCluster(ScanPoint corePoint, List <ScanPoint> nearPoint, int clusterNum, double radius, int minPts)
{
corePoint.PointType = PointType.Core;
corePoint.ClusterNum = clusterNum;
foreach (var p in nearPoint)
{
if (p.VisitedType == VisitedType.Unvisited)
{
p.VisitedType = VisitedType.Visited;
List <ScanPoint> neighborPoints = GetRegionPoints(p, radius);
if (neighborPoints.Count >= minPts)
{
ExpandCluster(p, neighborPoints, clusterNum, radius, minPts);
}
else
{
p.PointType = PointType.Edge;
p.ClusterNum = clusterNum;
}
}
else
{
if (p.ClusterNum < 0)
{
p.PointType = PointType.Edge;
p.ClusterNum = clusterNum;
}
}
}
}
private List <ScanPoint> GetRegionPoints(ScanPoint corePoint, double radius)
{
List <ScanPoint> result = new List <ScanPoint>();
List <ScanPoint> otherPoints = _allPoints.Except(new List <ScanPoint>()
{
corePoint
}).ToList();
foreach (var p in otherPoints)
{
if (_calculateDistance(corePoint, p) <= radius)
{
result.Add(p);
}
}
return(result);
}