/// <summary>
/// Computes the set-theoretic intersection of two <c>Geometry</c>s, using enhanced precision.
/// </summary>
/// <param name="geom0">The first Geometry.</param>
/// <param name="geom1">The second Geometry.</param>
/// <returns>The Geometry representing the set-theoretic intersection of the input Geometries.</returns>
public static IGeometry Intersection(IGeometry geom0, IGeometry geom1)
{
ApplicationException originalEx = null;
try
{
IGeometry result = geom0.Intersection(geom1);
return result;
}
catch (ApplicationException ex)
{
originalEx = ex;
}
/*
* If we are here, the original op encountered a precision problem
* (or some other problem). Retry the operation with
* enhanced precision to see if it succeeds
*/
try
{
CommonBitsOp cbo = new CommonBitsOp(true);
IGeometry resultEP = cbo.Intersection(geom0, geom1);
// check that result is a valid point after the reshift to orginal precision
if (!resultEP.IsValid)
throw originalEx;
return resultEP;
}
catch(ApplicationException)
{
throw originalEx;
}
}
public void TestPackedCoordinateSequence()
{
var pcsFactory = new GeometryFactory(PackedCoordinateSequenceFactory.DoubleFactory);
var geom0 = Read(pcsFactory, "POLYGON ((210 210, 210 220, 220 220, 220 210, 210 210))");
var geom1 = Read("POLYGON ((225 225, 225 215, 215 215, 215 225, 225 225))");
var cbo = new CommonBitsOp(true);
var result = cbo.Intersection(geom0, geom1);
var expected = geom0.Intersection(geom1);
//Geometry expected = read("POLYGON ((220 215, 215 215, 215 220, 220 220, 220 215))");
CheckEqual(expected, result);
}
