PK_pick_approximate_t   


typedef int PK_pick_approximate_t;


The 'pick_approx' option can be set to one of the following values:

PK_pick_approximate_yes_c           Curves are approximated by a sequence
                                    of straight line chords.

PK_pick_approximate_no_c            Accurate curve geometry is used when
                                    checking whether the ray intersects
                                    a face.

The default value is PK_pick_approximate_yes_c and it is recommended for
interactive picking operations.