/// <summary>
/// Enlarges the boundary of the Envelope so that it contains other.
/// </summary>
/// <remarks>Does nothing if other is wholly on or within the boundaries.</remarks>
/// <param name="other">The Envelope to merge with</param>
public void ExpandToInclude(Envelope other)
{
if (other.IsNull())
{
return;
}
if (IsNull())
{
_minX = other.MinX;
_maxX = other.MaxX;
_minY = other.MinY;
_maxY = other.MaxY;
}
else
{
if (other._minX < _minX)
{
_minX = other._minX;
}
if (other._maxX > _maxX)
{
_maxX = other._maxX;
}
if (other._minY < _minY)
{
_minY = other._minY;
}
if (other._maxY > _maxY)
{
_maxY = other._maxY;
}
}
}
/// <summary>
/// Converts an envnelope to a geometry.
/// </summary>
/// <param name="envelope">The Envelope to convert to a Geometry.</param>
/// <param name="precisionModel">The specification of the grid of allowable points for the new Geometry.</param>
/// <param name="SRID">The ID of the Spatial Reference System used by the Envelope.</param>
/// <returns>an empty Point (for null Envelopes), a Point (when min x = max x and min y = max y)
/// or a Polygon (in all other cases)</returns>
/// <exception cref="TopologyException"> if coordinates is not a closed linestring, that is, if the
/// first and last coordinates are not equal.</exception>
public static Geometry ToGeometry(Envelope envelope, PrecisionModel precisionModel, int SRID)
{
if (envelope.IsNull())
{
return(new Point(null, precisionModel, SRID));
}
if (envelope.MinX == envelope.MaxX && envelope.MinY == envelope.MaxY)
{
return(new Point(new Coordinate(envelope.MinX, envelope.MinY), precisionModel, SRID));
}
Coordinates coords = new Coordinates();
coords.Add(new Coordinate(envelope.MinX, envelope.MinY));
coords.Add(new Coordinate(envelope.MaxX, envelope.MinY));
coords.Add(new Coordinate(envelope.MaxX, envelope.MaxY));
coords.Add(new Coordinate(envelope.MinX, envelope.MaxY));
coords.Add(new Coordinate(envelope.MinX, envelope.MinY));
return(new Polygon(new LinearRing(coords, precisionModel, SRID), precisionModel, SRID));
}
/// <summary>
/// Determines if the two objects are of the same type and if they contain the elements.
/// </summary>
/// <param name="other">The other object to be compared.</param>
/// <returns>A bool containing either true of false based on the equality of the two objects.</returns>
public override bool Equals(Object other)
{
bool returnValue = false;
Envelope env = other as Envelope;
if (env != null)
{
if (IsNull())
{
returnValue = env.IsNull();
}
else
{
returnValue = _maxX == env.MaxX &&
_maxY == env.MaxY &&
_minX == env.MinX &&
_minY == env.MinY;
}
}
return(returnValue);
}
/// <summary>
/// Gets the extents of the Geometry.
/// </summary>
/// <param name="minX">The minimum X value.</param>
/// <param name="minY">The minimum Y value.</param>
/// <param name="maxX">The maximum X value.</param>
/// <param name="maxY">The maximum Y value.</param>
public virtual void Extent2D(out double minX, out double minY, out double maxX, out double maxY)
{
//If the member variable is null get the Envelope
if(_envelope == null)
{
GetEnvelopeInternal();
}
//if the envelope is null get all zeros
if(!_envelope.IsNull())
{
minX = _envelope.MinX;
minY = _envelope.MinY;
maxX = _envelope.MaxX;
maxY = _envelope.MaxY;
}
else
{
minX = 0;
minY = 0;
maxX = 0;
maxY = 0;
}
}
public void Insert( Envelope itemEnv, object item )
{
if ( itemEnv.IsNull() ) { return; }
base.Insert( itemEnv, item );
}
/// <summary>
/// Enlarges the boundary of the Envelope so that it contains other.
/// </summary>
/// <remarks>Does nothing if other is wholly on or within the boundaries.</remarks>
/// <param name="other">The Envelope to merge with</param>
public void ExpandToInclude(Envelope other)
{
if (other.IsNull())
{
return;
}
if (IsNull())
{
_minX = other.MinX;
_maxX = other.MaxX;
_minY = other.MinY;
_maxY = other.MaxY;
}
else
{
if (other._minX < _minX)
{
_minX = other._minX;
}
if (other._maxX > _maxX)
{
_maxX = other._maxX;
}
if (other._minY < _minY)
{
_minY = other._minY;
}
if (other._maxY > _maxY)
{
_maxY = other._maxY;
}
}
}
/// <summary>
/// Converts an envnelope to a geometry.
/// </summary>
/// <param name="envelope">The Envelope to convert to a Geometry.</param>
/// <param name="precisionModel">The specification of the grid of allowable points for the new Geometry.</param>
/// <param name="SRID">The ID of the Spatial Reference System used by the Envelope.</param>
/// <returns>an empty Point (for null Envelopes), a Point (when min x = max x and min y = max y)
/// or a Polygon (in all other cases)</returns>
/// <exception cref="TopologyException"> if coordinates is not a closed linestring, that is, if the
/// first and last coordinates are not equal.</exception>
public static Geometry ToGeometry(Envelope envelope, PrecisionModel precisionModel, int SRID)
{
if ( envelope.IsNull() )
{
return new Point( null, precisionModel, SRID );
}
if ( envelope.MinX == envelope.MaxX && envelope.MinY == envelope.MaxY )
{
return new Point( new Coordinate(envelope.MinX, envelope.MinY), precisionModel, SRID );
}
Coordinates coords = new Coordinates();
coords.Add( new Coordinate( envelope.MinX, envelope.MinY ) );
coords.Add( new Coordinate( envelope.MaxX, envelope.MinY ) );
coords.Add( new Coordinate( envelope.MaxX, envelope.MaxY ) );
coords.Add( new Coordinate( envelope.MinX, envelope.MaxY ) );
coords.Add( new Coordinate( envelope.MinX, envelope.MinY ) );
return new Polygon( new LinearRing( coords, precisionModel, SRID), precisionModel, SRID);
}