struct PK_EDGE_attach_curve_nmnl_o_s
    {
    int                 o_t_version;    --- version number of option structure
    PK_LOGICAL_t        have_interval;  --- t_int is set (PK_LOGICAL_false)
    PK_INTERVAL_t       t_int;          --- Parametric interval of edge (0,1)
    };

typedef struct PK_EDGE_attach_curve_nmnl_o_s PK_EDGE_attach_curve_nmnl_o_t;



This options structure holds optional controls for PK_EDGE_attach_curve_nmnl.


 Description of fields:

have_interval         Indicates whether or not a parametric interval is
                        being passed in through the t_int parameter.

t_int                 If have_interval is set to PK_LOGICAL_true, t_int
                        should contain the parametric interval of the edge
                        argument to PK_EDGE_attach_curve_nmnl on the curve
                        supplied. In this case, the points on the curve
                        corresponding to the ends of the interval must lie
                        within the vertex precision of the points at the edge's
                        bounding vertices, or the call will fail with
                        PK_ERROR_bad_interval.