struct PK_BODY_loft_matches_s
    {
    int                           n_mappings;
    PK_BODY_profile_match_t *mappings;
    };

typedef struct PK_BODY_loft_matches_s PK_BODY_loft_matches_t;



This structure holds an array of mappings, each of which describes associations
between the vertices of a profile of the loft and those of its immediate
following neighbour.


The matching structure has the following fields :

n_mappings        The number of mappings held in the structure. When
                    mappings are provided his must equal to the number of
                    profiles for a loft that is periodic, and one less than
                    that for a loft that is not periodic.
                    A value of zero for this field indicates no mappings are
                    provided.

mappings          An array of mappings, each of which describes
                    associations between the vertices of a profile of the
                    loft and those of its immediately following neighbour.