public static Visibility ConnectGraphs(List <Visibility> visibilityGraphs, List <DSGeom.Line> lines)
{
if (visibilityGraphs == null)
{
throw new ArgumentNullException("visibilityGraphs");
}
List <VisibilityGraph> visGraphs = visibilityGraphs.Select(vg => (VisibilityGraph)vg.graph).ToList();
VisibilityGraph mergedGraph = VisibilityGraph.Merge(visGraphs);
var edges = lines.Select(l => l.ToEdge()).ToList();
return(new Visibility()
{
graph = VisibilityGraph.AddEdges(mergedGraph, edges)
});
}