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**MODEL ENTITY OPERATORS:**
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*GType* **GEnt\_Type**(*PGeomEntity* gent);
Type of a geometric model entity (GREGION, GFACE, GEDGE, GVERTEX,
GUNKNOWN). Typically can be used in conjunction with the operator to
get mesh entity classification. So one can get the model entity a mesh
vertex is on, query what type it is and do something based on the
response (e.g. reposition the vertex only if it is classified in a
model region).
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*int* **GEnt\_Number**(*PGeomEntity* gent);
ID Number of geometric model entity. Can be called instead of
GR\_Number, GF\_Number, GE\_Number and GV\_Number.
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*int* **GEnt\_OnBoundary**(*PGeomEntity* g1, *PGeomEntity* g2);
Check if g2 is on the boundary of g1 (Check if a face is on the
boundary of a region, an edge is on the boundary of a face, a vertex
is on the boundary of a region)
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*int* **GEnts\_Common**(*int* nent, *GType*
*types, *PGeomEntity*
*gents, *int*
*ncm, *GType*
*ctypes, *PGeomEntity*
*cgents)
Given *nent* entitities (the entity pointers given in *gents* and their
types in *types*), find their common entities, *cgents*. The entities
will be of the lowest order possible (but higher than the highest order
of the input entities). For example, if we were given two model edges
connected by one common face, the output would be this common face. On
the other hand if these edges were not connected by a common face but
the faces connected to them are on the boundary of the same model
region, the model region would be returned as a common entity.
Naturally, there may be more than one such common model entity in
general geometric models.
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*int* **GEnt\_OnExtBoundary**(*PGeomEntity* gent)
Check if model entity is on external boundary
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