} // private void LabelIsolatedEdges( int thisIndex, int targetIndex )
/// <summary>
/// Label an isolated edge of a graph with its relationship to the target geometry.
/// If the target has dim 2 or 1, the edge can either be in the interior or the exterior.
/// If the target has dim 0, the edge must be in the exterior.
/// </summary>
/// <param name="e"></param>
/// <param name="targetIndex"></param>
/// <param name="target"></param>
private void LabelIsolatedEdge(Edge e, int targetIndex, Geometry target)
{
// this won't work for GeometryCollections with both dim 2 and 1 geoms
if ( target.GetDimension() > 0)
{
// since edge is not in boundary, may not need the full generality of PointLocator?
// Possibly should use ptInArea locator instead? We probably know here
// that the edge does not touch the bdy of the target Geometry
int loc = _ptLocator.Locate( e.GetCoordinate(), target );
e.Label.SetAllLocations( targetIndex, loc );
} // if ( target.Dimension > 0)
else
{
e.Label.SetAllLocations( targetIndex, Location.Exterior );
}
//Trace.WriteLine( e.Label.ToString() );
} // private void LabelIsolatedEdge(Edge e, int targetIndex, Geometry target)
///<summary>
/// Returns true if the DE-9IM intersection matrix for the two Geometrys is T*F**FFF*.
///</summary>
///<remarks>EqualsTopology is a topological relationship, and does not imply that the Geometries have
///the same points or even that they are of the same class. This more restrictive form of equality
///is implemented in the Equals method. Two geometries are topologically equal if and only iff their interiors
///intersect and no part of the interior or boundary of one geomtry intersects the exterior of the other.
///</remarks>
///<param name="geometry">The Geometry with which to compare this Geometry.</param>
///<returns>Returns true if the two Geometrys are equal.</returns>
public virtual bool EqualsTopology(Geometry geometry)
{
return Relate( geometry ).IsEquals( GetDimension(), geometry.GetDimension() );
} // public virtual bool Equals(Geometry geometry)
///<summary>
/// Returns true if the DE-9IM intersection matrix for the two Geometrys is: T*T****** for a point
/// and a curve, a point and an area or a line and an area, 0******** for two curves.
///</summary>
///<param name="geometry">The Geometry with which to compare this Geometry.</param>
///<returns>Returns true if the two Geometrys cross. For this function to return true, the Geometry's
/// must be a point and a curve; a point and a surface; two curves; or a curve and a surface.</returns>
public virtual bool Crosses(Geometry geometry)
{
return Relate(geometry).IsCrosses( GetDimension(), geometry.GetDimension() );
}
///<summary>
/// Returns true if the DE-9IM intersection matrix for the two Geometrys is: <br>
/// T*T***T** (for two points or two surfaces) <br>
/// 1*T***T** (for two curves)
///</summary>
///<param name="geometry">The Geometry with which to compare this Geometry.</param>
///<returns>
/// Returns true if the two Geometrys overlap. For this function to return true,
/// the Geometry s must be two points, two curves or two surfaces.
///</returns>
public virtual bool Overlaps(Geometry geometry)
{
return Relate(geometry).IsOverlaps( GetDimension(), geometry.GetDimension() );
}
///<summary>
/// Returns true if the DE-9IM intersection matrix for the two
/// Geometrys is FT*******, F**T***** or F***T****.
///</summary>
///<param name="geometry">The Geometry with which to compare this Geometry.</param>
///<returns>Returns true if the two Geometrys touch; Returns false if both Geometrys are points.</returns>
public virtual bool Touches(Geometry geometry)
{
return Relate(geometry).IsTouches( GetDimension(), geometry.GetDimension() );
}