/// <summary>
/// This Constructor Doesnt do anything special. It just treats the layer as a graph.
/// </summary>
/// <param name="theLayer">The Layer</param>
public GraphFactory(VectorLayer theLayer)
{
_geomFactory = GeoAPI.GeometryServiceProvider.Instance.CreateGeometryFactory(theLayer.SRID);
var featureCount = theLayer.DataSource.GetFeatureCount();
System.Diagnostics.Debug.WriteLine("Feature Count: = " + featureCount);
theLayer.DataSource.Open();
var featureIds = theLayer.DataSource.GetObjectIDsInView(theLayer.Envelope);
_edgeCost = new Dictionary<Edge<Coordinate>, double>();
_listOfEndPoints = new List<LineEndPoints>();
foreach (uint featureID in featureIds)
{
var feature = theLayer.DataSource.GetGeometryByID(featureID);
// We need this incase the lines are multistring.
if (feature.OgcGeometryType == OgcGeometryType.LineString)
{
var ls = (ILineString)feature;
//var numberOfPoints = ls.NumPoints;
// We need a copy of the feature so we can display it. Or perhaps we dont who knows.
_theLineStrings.Add(featureIds[(int)featureID], (ILineString)feature);
var pp = new LineEndPoints(ls.StartPoint.Coordinate, ls.EndPoint.Coordinate, ls.Length);
_listOfEndPoints.Add(pp);
if (!_graph.ContainsVertex(ls.StartPoint.Coordinate))
_graph.AddVertex(ls.StartPoint.Coordinate);
if (!_graph.ContainsVertex(ls.EndPoint.Coordinate))
_graph.AddVertex(ls.EndPoint.Coordinate);
var theEdge = new Edge<Coordinate>(ls.StartPoint.Coordinate, ls.EndPoint.Coordinate);
_graph.AddEdge(theEdge);
_edgeCost.Add(theEdge,ls.Length);
var theReverseEdge = new Edge<Coordinate>(ls.EndPoint.Coordinate, ls.StartPoint.Coordinate);
_graph.AddEdge(theReverseEdge);
_edgeCost.Add(theReverseEdge, ls.Length);
}
else if (feature.OgcGeometryType == OgcGeometryType.MultiLineString)
{
var mls = (IMultiLineString)feature;
for(var i = 0; i < mls.NumGeometries; i++)
{
var ls = (ILineString) mls.GetGeometryN(i);
// We need a copy of the feature so we can display it. Or perhaps we dont who knows.
_theLineStrings.Add(featureIds[(int)featureID], (ILineString)feature);
var pp = new LineEndPoints(ls.StartPoint.Coordinate, ls.EndPoint.Coordinate, ls.Length);
_listOfEndPoints.Add(pp);
if (!_graph.ContainsVertex(ls.StartPoint.Coordinate))
_graph.AddVertex(ls.StartPoint.Coordinate);
if (!_graph.ContainsVertex(ls.EndPoint.Coordinate))
_graph.AddVertex(ls.EndPoint.Coordinate);
var theEdge = new Edge<Coordinate>(ls.StartPoint.Coordinate, ls.EndPoint.Coordinate);
_graph.AddEdge(theEdge);
_edgeCost.Add(theEdge, ls.Length);
var theReverseEdge = new Edge<Coordinate>(ls.EndPoint.Coordinate, ls.StartPoint.Coordinate);
_graph.AddEdge(theReverseEdge);
_edgeCost.Add(theReverseEdge, ls.Length);
}
}
}
System.Diagnostics.Debug.WriteLine("Graph Stats:" + _graph.EdgeCount + " , " + _graph.VertexCount);
}
/// <summary>
/// This Constructor Doesnt do anything special. It just treats the layer as a graph.
/// </summary>
/// <param name="theLayer">The Layer</param>
public GraphFactory(VectorLayer theLayer)
{
_geomFactory = GeoAPI.GeometryServiceProvider.Instance.CreateGeometryFactory(theLayer.SRID);
var featureCount = theLayer.DataSource.GetFeatureCount();
System.Diagnostics.Debug.WriteLine("Feature Count: = " + featureCount);
theLayer.DataSource.Open();
var featureIds = theLayer.DataSource.GetObjectIDsInView(theLayer.Envelope);
_edgeCost = new Dictionary <Edge <Coordinate>, double>();
_listOfEndPoints = new List <LineEndPoints>();
foreach (uint featureID in featureIds)
{
var feature = theLayer.DataSource.GetGeometryByID(featureID);
// We need this incase the lines are multistring.
if (feature.OgcGeometryType == OgcGeometryType.LineString)
{
var ls = (ILineString)feature;
//var numberOfPoints = ls.NumPoints;
// We need a copy of the feature so we can display it. Or perhaps we dont who knows.
_theLineStrings.Add(featureIds[(int)featureID], (ILineString)feature);
var pp = new LineEndPoints(ls.StartPoint.Coordinate, ls.EndPoint.Coordinate, ls.Length);
_listOfEndPoints.Add(pp);
if (!_graph.ContainsVertex(ls.StartPoint.Coordinate))
{
_graph.AddVertex(ls.StartPoint.Coordinate);
}
if (!_graph.ContainsVertex(ls.EndPoint.Coordinate))
{
_graph.AddVertex(ls.EndPoint.Coordinate);
}
var theEdge = new Edge <Coordinate>(ls.StartPoint.Coordinate, ls.EndPoint.Coordinate);
_graph.AddEdge(theEdge);
_edgeCost.Add(theEdge, ls.Length);
var theReverseEdge = new Edge <Coordinate>(ls.EndPoint.Coordinate, ls.StartPoint.Coordinate);
_graph.AddEdge(theReverseEdge);
_edgeCost.Add(theReverseEdge, ls.Length);
}
else if (feature.OgcGeometryType == OgcGeometryType.MultiLineString)
{
var mls = (IMultiLineString)feature;
for (var i = 0; i < mls.NumGeometries; i++)
{
var ls = (ILineString)mls.GetGeometryN(i);
// We need a copy of the feature so we can display it. Or perhaps we dont who knows.
_theLineStrings.Add(featureIds[(int)featureID], (ILineString)feature);
var pp = new LineEndPoints(ls.StartPoint.Coordinate, ls.EndPoint.Coordinate, ls.Length);
_listOfEndPoints.Add(pp);
if (!_graph.ContainsVertex(ls.StartPoint.Coordinate))
{
_graph.AddVertex(ls.StartPoint.Coordinate);
}
if (!_graph.ContainsVertex(ls.EndPoint.Coordinate))
{
_graph.AddVertex(ls.EndPoint.Coordinate);
}
var theEdge = new Edge <Coordinate>(ls.StartPoint.Coordinate, ls.EndPoint.Coordinate);
_graph.AddEdge(theEdge);
_edgeCost.Add(theEdge, ls.Length);
var theReverseEdge = new Edge <Coordinate>(ls.EndPoint.Coordinate, ls.StartPoint.Coordinate);
_graph.AddEdge(theReverseEdge);
_edgeCost.Add(theReverseEdge, ls.Length);
}
}
}
System.Diagnostics.Debug.WriteLine("Graph Stats:" + _graph.EdgeCount + " , " + _graph.VertexCount);
}