PK_ERROR_code_t     PK_EDGE_find_blend_topol
(
--- received arguments ---
PK_EDGE_t           edge,           --- edge on which to
                                    --- find blend

--- returned arguments ---
int                *const n_edges,  --- number of affected edges
PK_EDGE_t         **const edges,    --- affected edges
int                *const n_faces,  --- number of affected faces
PK_FACE_t         **const faces     --- affected faces
)


This function finds the edges and faces affected by the blend on
the given edge.


Specific Errors:
    PK_ERROR_general_body       edge is from a general body
    PK_ERROR_not blended        bo blend on given edge
    PK_ERROR_bad_blend_bound    illegal blend boundary


Finds lists of edges and faces that are affected by the blending surface on
the given edge. The faces in faces and edges in edges are those partially
or completely overlapped by the blending surface.

The array edges will always contain the original edge edge.

This function is not supported for edges on general bodies.