struct PK_BCURVE_fit_eval_data_s
    {
    PK_POINTER_t            external_data;--- for external evaluator (NULL)

    PK_BCURVE_fit_chain_t   chain_data;   --- for internal chain-of-curves
                                          --- evaluator
    };

typedef struct PK_BCURVE_fit_eval_data_s PK_BCURVE_fit_eval_data_t;



This structure contains the data for the fitting evaluator functions.



This structure contains the following fields:

external_data     This field is to contain data for a user-supplied
                    evaluator function.  It will be passed to the function
                    whenever that function is called.  Parasolid will not
                    examine this data.

chain_data        This field is to contain data for the internal
                    PK_BCURVE_fit_eval_chain_c evaluator function.