public static IEnumerable <IEnumerable <IPoint> > GetCoordinates(this IGeometry geometry)
{
List <IPoint[]> points = new List <IPoint[]>();
if (geometry is IPolygon)
{
IPolygon polygon = (IPolygon)geometry;
points.AddRange(polygon.Rings.Select(a => a.Select(b => b).Cast <IPoint>().ToArray()));
}
else if (geometry is IPoint)
{
IPoint point = (IPoint)geometry;
points.Add(new IPoint[] { point });
}
else if (geometry is IMultiPoint)
{
IMultiPoint multipoint = (IMultiPoint)geometry;
points.AddRange(multipoint.Points.Select(a => new IPoint[] { a }));
}
else if (geometry is IMultiLine)
{
IMultiLine polyline = (IMultiLine)geometry;
points.AddRange(polyline.Paths.Select(a => a.Select(b => b).Cast <IPoint>().ToArray()));
}
else if (geometry is LineString)
{
LineString line = (LineString)geometry;
points.Add(line.Coordinates.ToArray());
}
else
{
throw new NotSupportedException();
}
return(points.AsEnumerable());
}
public static bool ExecuteBoolean(IMultiLine line1, IMultiLine line2)
{
IEnumerable <IPoint> intersections = LineIntersect.Execute(line1, line2);
if (intersections != null && intersections.Count() > 0)
{
return(true);
}
return(false);
}
public static IEnumerable <IPoint> Execute(IMultiLine line1, IMultiLine line2)
{
IEnumerable <IPoint> intersections = LineIntersect.Execute(line1, line2);
if (intersections != null && intersections.Count() > 0)
{
return(intersections);
}
return(null);
}
public static bool ExecuteBoolean(IMultiLine lines, IPolygon poly)
{
foreach (IEnumerable <IPoint> line in lines.GetCoordinates())
{
if (ExecuteBoolean(line, poly))
{
return(true);
}
}
return(false);
}
public static IEnumerable <IPoint> Execute(IMultiLine lines, IPolygon poly)
{
foreach (IEnumerable <IPoint> line in lines.GetCoordinates())
{
IEnumerable <IPoint> sharedPoints = Execute(line, poly);
if (sharedPoints != null)
{
foreach (IPoint point in sharedPoints)
{
yield return(point);
}
}
}
}