PK_FACE_intersect_face

PK_ERROR_code_t                   PK_FACE_intersect_face
(
--- received arguments ---
PK_FACE_t                         face_1,     --- first face
PK_FACE_t                         face_2,     --- second face
const PK_FACE_intersect_face_o_t *options,    --- options structure [PF]

--- returned arguments ---
int                        *const n_vectors,  --- number of point intersections
PK_VECTOR_t               **const vectors,    --- posns of point intersections
int                        *const n_curves,   --- number of intersection curves
PK_CURVE_t                **const curves,     --- intersection curves
PK_INTERVAL_t             **const bounds,     --- bounds of curves
PK_intersect_curve_t      **const types       --- types of intersections
)


PK_FACE_intersect_face finds the intersections between two faces.

This function offers partial support for facet geometry [PF]


Specific Errors:
    PK_ERROR_bad_option_data    (MILD)    bad option structure data given
    PK_ERROR_missing_geom       (MILD)    face has no attached geometry
    PK_ERROR_bad_combination    (MILD)    a mixture of facet and classic
                                          geometry has been supplied
    PK_ERROR_not_on_curve       (SERIOUS) seed vector provided does not lie on
                                          intersection of faces
    PK_ERROR_cant_do_intersect  (SERIOUS) intersection cannot be done



 PK_FACE_intersect_face finds the intersections between two faces
 ('face_1' and 'face_2'), returning intersection points ('vectors')
 and curves of intersection ('curves').

 If the faces are from the same body any curves returned will be created as
 construction geometry in the body.

 If the faces are from different bodies and any of the curves returned are of
 type intersection curve, then these curves will refer to copies of
 the surfaces of faces.

 No attempt is made to define surface regions of partial coincidence, and
 if the surfaces of faces are fully coincident no intersection data will be
 returned.

 Currently, curves returned from mixed geometry intersections are always
 polylines.

 The returned points ('vectors') will be returned at points where the faces
 make point contact. 'n_vectors' indicates the number of intersection points.

 The curves returned ('curves') will be the basis curves of trimmed curves,
 and their corresponding bound in 'bounds',  'n_curves' indicates
 the number of curves returned.

 'type' classifies curves as being either:

      PK_intersect_curve_simple_c : Simple intersection curves
   or PK_intersect_curve_tangent_c: Tangent intersection curves