struct PK_section_r_s
    {
    PK_BODY_array_t front_bodies;  --- Bodies in front of section
    PK_BODY_array_t back_bodies;   --- Bodies behind section
    PK_FACE_array_t front_faces;   --- Faces in front of section
    PK_FACE_array_t back_faces;    --- Faces behind section
    };
typedef struct PK_section_r_s PK_section_r_t;




This structure contains the results of a section operation for bodies
or faces.


The arrays of entities are returned under the control of the fence
field of an options structure, and will be set to (NULL, 0) if not
requested, or empty (length of zero).

The function PK_section_r_f may be used to free associated memory.

Description of fields:



front_bodies           The array of resultant bodies in front of the
                         sectioning tool.


back_bodies            The array of resultant bodies behind the
                         sectioning tool.


front_faces            The array of new faces of the resultant bodies
                         in front of the sectioning tool.


back_faces             The array of new faces of the resultant bodies
                         behind the sectioning tool.