} // private int Locate( Coordinate p, LinearRing ring )
private int Locate( Coordinate p, Polygon poly )
{
if ( poly.IsEmpty() )
{
return Location.Exterior;
}
LinearRing shell = (LinearRing) poly.GetExteriorRing();
int shellLoc = Locate( p, shell );
if ( shellLoc == Location.Exterior )
{
return Location.Exterior;
}
if ( shellLoc == Location.Boundary )
{
return Location.Boundary;
}
// now test if the point lies in or on the holes
for ( int i = 0; i < poly.GetNumInteriorRing(); i++ )
{
int holeLoc = Locate( p, poly.GetInteriorRingN( i ) );
if ( holeLoc == Location.Interior )
{
return Location.Exterior;
}
if ( holeLoc == Location.Boundary )
{
return Location.Boundary;
}
} // for ( int i = 0; i < poly.NumInteriorRings; i++ )
return Location.Interior;
} // private int Locate( Coordinate p, Polygon poly )
/// <summary>
/// Converts a Polygon to <Polygon Text> format, then
/// Appends it to the writer.
/// </summary>
/// <param name="polygon">The Polygon to process.</param>
/// <param name="level"></param>
/// <param name="indentFirst"></param>
/// <param name="writer"></param>
protected void AppendPolygonText(Polygon polygon, int level, bool indentFirst, StringWriter writer)
{
if ( polygon.IsEmpty() )
{
writer.Write("EMPTY");
}
else
{
if (indentFirst) Indent(level, writer);
writer.Write("(");
AppendLineStringText(polygon.Shell, level, false, writer);
for (int i = 0; i < polygon.GetNumInteriorRing(); i++)
{
writer.Write(", ");
AppendLineStringText(polygon.Holes[i], level + 1, true, writer);
}
writer.Write(")");
}
}
/// <summary>
/// Converts a Polygon to <Polygon Text> format, then
/// Appends it to the writer.
/// </summary>
/// <param name="polygon">The Polygon to process.</param>
/// <param name="writer"></param>
protected void AppendPolygonText(Polygon polygon, TextWriter writer)
{
if (polygon.IsEmpty())
{
//writer.Write("EMPTY");
}
else
{
AppendLineStringText(polygon.Shell,writer);
for (int i = 0; i < polygon.GetNumInteriorRing(); i++)
{
AppendLineStringText(polygon.Holes[i], writer);
}
writer.Write(" Z ");
}
}
} // private static bool ContainsPoint(Coordinate p, Geometry geom)
private static bool ContainsPointInPolygon(Coordinate p, Polygon poly)
{
if ( poly.IsEmpty() ) return false;
LinearRing shell = (LinearRing) poly.GetExteriorRing();
if ( ! _cga.IsPointInRing( p, shell.GetCoordinates() ) )
{
return false;
}
// now test if the point lies in or on the holes
for (int i = 0; i < poly.GetNumInteriorRing(); i++)
{
LinearRing lr = poly.GetInteriorRingN( i );
if ( _cga.IsPointInRing( p, lr.GetCoordinates() ) )
{
return false;
}
}
return true;
} // private static bool ContainsPointInPolygon(Coordinate p, Polygon poly)
