PK_knot_type_t

typedef int PK_knot_type_t;

Used in:

PK_BCURVE_sf_t
PK_BSURF_sf_t
PK_LAW_sf_t

This field can take any one of the following values.
    'PK_knot_unset_c'            : The type has not been calculated.
    'PK_knot_non_uniform_c'      : The knot set is general non uniform.
    'PK_knot_uniform_c'          : The knots are uniformly spaced.
    'PK_knot_quasi_uniform_c'    : The first and last knots have
                                   multiplicity degree+1, and the
                                   remainder have multiplicity 1, with
                                   equal spacing.
    'PK_knot_piecewise_bezier_c' : The first and last knots have
                                   multiplicity degree+1 and the
                                   remainder have multiplicity degree,
                                   with equal spacing.
    'PK_knot_bezier_ends_c'      : The first and last knots have
                                   multiplicity degree+1.  In other
                                   respects the knot set is non uniform.
    'PK_knot_smooth_seam_c'      : Applicable only to PK_BCURVE_create.
                                   Modifications will be made to the curve
                                   input data to guarantee the end and start
                                   of the curve meet sufficiently smoothly to
                                   ensure periodic parameterisation. The first
                                   knot multiplicity must equal 1 and the sum
                                   of knot multiplicities must equal
                                   n_vertices+1. The multiplicity of the
                                   periodic knot is defined by the last knot
                                   multiplicity and must be less than degree+1.
                                   The algorithm will then ensure sufficient
                                   smoothness is achieved by repeating the
                                   first n vertices at the end and by matching
                                   knot intervals, where n equals the order
                                   less periodic knot multiplicity.