Class Hierarchy
AcRxObject AcDbGeomRef AcDbPathRef AcDbSubentRef
C++
class AcDbGeomRef : public AcRxObject;
File
AcDbGeomRef.h
Description
Base class for the concrete derived classes like AcDbEdgeRef, AcDbPathRef and AcDbVertexRef. These are simple classes that keep a reference to a subentity of an entity and can represent this subentity information in various ways. They are used mainly to pass around information about geometry of a subentity or of an entity, not to keep this information.
The subentity references are non-presistent. Anytime the referenced entity is changed or re-evaluated, the subentity reference becomes invalid. Persistent references can be established using AcDbAssocEdgeActionParam, AcDbAssocPathActionParam, AcDbAssocVertexActionParam, or directly using AcDbAssocGeomDependencies.