typedef int PK_intersect_fc_t;
This datatype contains information that classifies how a face intersects
a bounded curve.
One of these values:
PK_intersect_fc_simple_c The curve passes through the surface of the
face at a single point.
PK_intersect_fc_tangent_c The curve touches the surface of the face at
single point but does not pass through it.
PK_intersect_fc_out_in_c The curve passes from being outside the face
to the interior of the face.
PK_intersect_fc_in_out_c The curve passes from being in the interior
of the face to the outside of the face.
PK_intersect_fc_out_coi_c The curve passes from being outside the face
to a region of coincidence with the boundary
of the face.
PK_intersect_fc_coi_out_c The curve passes from a region of coincidence
with the boundary of the face to being
outside the face.
PK_intersect_fc_coi_in_c The curve passes from a region of coincidence
with the boundary of the face to being inside
the interior of the face.
PK_intersect_fc_in_coi_c The curve passes from being inside the
interior of the face to a region of
coincidence with the boundary of the face.
PK_intersect_fc_in_tangent_c The curve is tangent to the inside of an edge
or passes through a vertex, but remains
outside the face.
PK_intersect_fc_out_tangent_c The curve is tangent to the outside of an
edge or passes through a vertex, but remains
outside the face.
PK_intersect_fc_in_c The start or end of the curve is inside the
face or lies in its boundary.
PK_intersect_fc_start_c The curve enters the face at the start of a
region of coincidence with the surface.
PK_intersect_fc_end_c The curve leaves the face at the end of a
region of coincidence with the surface.
PK_intersect_fc_simple_c and PK_intersect_fc_tangent_c are used only when
curve and the surface of the face intersect at a single point. All other
values are used when all or part of the curve lies in the surface.
