internal static com.epl.geometry.Geometry PolylineMinusArea_(com.epl.geometry.Geometry geometry, com.epl.geometry.Geometry area, int area_type, com.epl.geometry.SpatialReference sr, com.epl.geometry.ProgressTracker progress_tracker)
{
// construct the complement of the Polygon (or Envelope)
com.epl.geometry.Envelope envelope = new com.epl.geometry.Envelope();
geometry.QueryEnvelope(envelope);
com.epl.geometry.Envelope2D env_2D = new com.epl.geometry.Envelope2D();
area.QueryEnvelope2D(env_2D);
envelope.Merge(env_2D);
double dw = 0.1 * envelope.GetWidth();
double dh = 0.1 * envelope.GetHeight();
envelope.Inflate(dw, dh);
com.epl.geometry.Polygon complement = new com.epl.geometry.Polygon();
complement.AddEnvelope(envelope, false);
com.epl.geometry.MultiPathImpl complementImpl = (com.epl.geometry.MultiPathImpl)(complement._getImpl());
if (area_type == com.epl.geometry.Geometry.GeometryType.Polygon)
{
com.epl.geometry.MultiPathImpl polygonImpl = (com.epl.geometry.MultiPathImpl)(area._getImpl());
complementImpl.Add(polygonImpl, true);
}
else
{
complementImpl.AddEnvelope((com.epl.geometry.Envelope)(area), true);
}
com.epl.geometry.OperatorFactoryLocal projEnv = com.epl.geometry.OperatorFactoryLocal.GetInstance();
com.epl.geometry.OperatorIntersection operatorIntersection = (com.epl.geometry.OperatorIntersection)projEnv.GetOperator(com.epl.geometry.Operator.Type.Intersection);
com.epl.geometry.Geometry difference = operatorIntersection.Execute(geometry, complement, sr, progress_tracker);
return(difference);
}