MgGeometricEntity Class Reference
[MgGeometricEntity]
Inherits MgSerializable.
Inherited by MgGeometry, and MgGeometryComponent.
Detailed Description
MgGeometricEntity is an abstract base class that is the root of all geometry and geometry component classes.
- Remarks:
- 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 () |
| 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 () |
| virtual bool | IsClosed ()=0 |
| Tests whether the entity's boundary encloses an area. | |
| virtual bool | IsEmpty ()=0 |
| 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. | |