/// <summary>
/// Computes the transformation of the source geometry graph.
/// </summary>
/// <param name="source">The source geometry graph.</param>
/// <returns>The geometry graph in the specified reference system.</returns>
private IGeometryGraph Compute(IGeometryGraph source)
{
IGeometryGraph graph = _factory.CreateGraph(source.VertexComparer, source.EdgeComparer, _metadataPreservation ? source.Metadata : null);
Dictionary <IGraphVertex, IGraphVertex> vertexMapping = new Dictionary <IGraphVertex, IGraphVertex>();
foreach (IGraphVertex vertex in source.Vertices)
{
vertexMapping.Add(vertex, graph.AddVertex(Compute(vertex.Coordinate), _metadataPreservation ? vertex.Metadata : null));
}
foreach (IGraphVertex vertex in source.Vertices)
{
foreach (IGraphEdge edge in source.OutEdges(vertex))
{
graph.AddEdge(vertexMapping[edge.Source], vertexMapping[edge.Target], _metadataPreservation ? edge.Metadata : null);
}
}
return(graph);
}
