MgGeometry Class Reference
[MgGeometry]

Inherits MgGeometricEntity.

Inherited by MgAggregateGeometry, MgCurve, MgPoint, and MgRegion.

List of all members.

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Detailed Description

MgGeometry is an abstract base class for all of the geometry types.

Remarks:

All of the geometries are constructed by calling non-static methods on an instance of MgGeometryFactory and are immutable once constructed.

Note:

The following analysis functions would throw MgGeometryException if called on an instance of MgMultiGeometry:

1. Intersection
2. Union
3. Difference
4. SymetricDifference
5. Disjoint
6. Touches
7. Intersects
8. Crosses
9. Within
10. Contains
11. Overlaps
12. Equals

Public Member Functions
virtual MgGeometry *	Boundary ()
	Remarks:
virtual MgGeometry *	Buffer (double distance, MgMeasure *measure)
	Returns a geometry that represents all points whose distance from this geometric entity is less than or equal to a given distance. By default, the distance computation is done using a linear algorithm unless a custom measure is supplied.
virtual bool	Contains (MgGeometry *other)
virtual MgGeometry *	ConvexHull ()
	Remarks: In section 12.4.2 [JTS1.4 ] states: "The convex hull of a Geometry is the smallest convex Polygon that contains all the points in the Geometry. If the convex hull contains fewer than 3 points, a lower dimension Geometry is returned, specified as follows:
virtual bool	Crosses (MgGeometry *other)
	Given 2 geometries a and b, a.Crosses(b) is true if and only if the dimension of the intersection of the interior of a and the interior of b is less than the greater of the dimension of the interior of a and the dimension of the interior of b and the intersection of a and b is neither a nor b.
virtual MgGeometry *	Difference (MgGeometry *other)
	Returns a geometry that represents a point set difference between this geometric entity and another.
virtual bool	Disjoint (MgGeometry *other)
	Given 2 geometries a and b, a.Disjoint(b)is true if and only if the intersection of a and b is empty.
virtual double	Distance (MgGeometry *other, MgMeasure *measure)
	Returns the shortest distance between this geometry and another. By default distance computation is done using a linear algorithm unless a custom measure is supplied.
virtual bool	Equals (MgGeometry *other)
	Given 2 geometries a and b, a.Equals(b) is true if the 2 geometries are spatially equal.
virtual INT32	GetGeometryType ()=0
	Gets the type of this geometry.
virtual MgGeometry *	Intersection (MgGeometry *other)
	Returns a geometry that represents the point set intersection of this geometry and another.
virtual bool	Intersects (MgGeometry *other)
	This is a convenience method. Given 2 geometries a and b, a.Intersects(b) is true if and only if a.Disjoint (b) is false.
virtual bool	Overlaps (MgGeometry *other)
	Given 2 geometries a and b, a.Overlaps(b) is true if and only if the dimension of the interior of a equals the dimension of the interior of b equals the dimension of the intersection of the interior of a and the interior of b and the intersection of a and b is neither a nor b.
virtual MgGeometry *	SymetricDifference (MgGeometry *other)
	Returns a geometry that represents the point set symmetric difference of this geometry with another.
virtual bool	Touches (MgGeometry *other)
	Given 2 geometries a and b, a.Touches(b) is true if and only if the intersection of the interior of a and the interior of b is empty and the intersection of a and b is not empty.
virtual MgGeometry *	Union (MgGeometry *other)
	Returns a geometry that represents the point set union of this geometry with another.
virtual bool	Within (MgGeometry *other)
	Given 2 geometries a and b, a.Within(b) is true if and only if the intersection of a and b is a and the intersection of the interior of a and the interior of b is not empty.

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