PK_BSURF_lower_degree

PK_ERROR_code_t                  PK_BSURF_lower_degree
(
--- received arguments ---
PK_BSURF_t                       bsurf,        --- b-surf
PK_PARAM_direction_t             u_or_v,       --- the direction in which to
                                               --- reduce the degree
int                              decrement,    --- amount to reduce by
const PK_BSURF_lower_degree_o_t *options       --- options
)


This function modifies the given 'bsurf' by reducing its 'u_or_v' degree
by 'decrement'.


Specific Errors:
    PK_ERROR_cant_make_bspline   degree reduction on the bsurf failed and
                                 the bsurf remains unmodified (SERIOUS)
    PK_ERROR_bad_value           'decrement' is not greater than zero (MILD)
    PK_ERROR_is_attached         'bsurf' is attached to topology or owned by
                                 other geometry (MILD)