Returns the 3d curve representing the specified intersection and the status of the intersection.
A pointer to OdGeCurve3d.
If the intersection is not a 3d curve, returns NULL. If some intersection is queried more than once, returns NULL and sets status to kXXUnknown.
Possible values for status are as follows:
untitled table kXXOk kXXIndexOutOfRange kXXWrongDimensionAtIndex kXXUnknown