private static IPointCollection GetPoints(IPointCollection pointCollection,
IGeometry inArea)
{
if (pointCollection == null ||
pointCollection.PointCount == 0)
{
return(null);
}
if (inArea == null)
{
return(pointCollection);
}
if (GeometryUtils.Disjoint(inArea, (IGeometry)pointCollection))
{
return(null);
}
// because intersecting multipoints with envelope is not implemented:
var withinPolygon = inArea as IPolygon;
withinPolygon = withinPolygon ?? GeometryFactory.CreatePolygon(inArea);
var result =
(IPointCollection)
IntersectionUtils.GetIntersection((IGeometry)pointCollection, withinPolygon);
return(result);
}
