MgGeometricEntity Class Reference
[MgGeometricEntity]

Inheritance diagram for MgGeometricEntity:

Detailed Description

MgGeometricEntity is an abstract base class that is the root of all geometry and geometry component classes.

Geometric entities are immutable once constructed.


Public Member Functions
virtual MgGeometricEntity *	Copy ()=0
	Returns a copy of this geometric entity.
virtual MgEnvelope *	Envelope ()
	Gets this geometric entity's bounding box.
virtual double	GetArea ()
	Returns the area for this geometric entity or zero for MgLineString and MgPoint objects. Calculates the area for each MgPolygon in an MgMultiPolygon or for each MgCurvePolygon in an MgMultiCurvePolygon and returns the sum of areas.
virtual MgPoint *	GetCentroid ()
	Calculates and returns the centroid of this geometric entity.
virtual INT32	GetDimension ()=0
	Gets the geometric dimension of this entity, indicating whether the entity is defined by points, curves, or regions, that is, is zero, one, or two dimensional.
virtual double	GetLength ()
	Calculates and returns the length for this geometric entity. Defaults to zero for MgPoint objects.
virtual bool	IsClosed ()=0
	Tests whether the entity's boundary encloses an area.
virtual bool	IsEmpty ()=0
	Tests whether this entity is empty or not.
virtual bool	IsSimple ()
	Tests whether this entity is simple or not. Simple entities do not contain any points of self-tangency or self intersection.
virtual bool	IsValid ()
	Tests whether the coordinates given to construct the entity represent a valid Geometry or GeometryComponent.
virtual MgGeometricEntity *	Transform (MgTransform *transform)=0
	Returns a transformed copy of this geometric entity.