# Synopsis

PDX_MSGT gdx_RefineKnotsCurve(long option, T_GDX_NURB_CURVE *cur, double *ref_vec, double knot_tol, int r)

# Purpose

Refine a curve's knot vector.

# Description

Refine a curve's knot vector; ie. insert the new knots and compute the new set of control points. The pointer cur does not change, but the original curve is destroyed (new control points and knots are allocated).

# Input

## option

Options (not used).

## cur

Pointer to the GDX NURB Curve whose knot vector is to be refined.

## ref_vec

Array containing all the new knots to be inserted.

## knot_tol

Knot coincidence tolerance.

## r

r+1 is the number of knots in ref_vec.

# Output

## cur

Pointer not changed, but contents of structure pointed to by cur are changed.

# Return

          GDX_NOERR
          Low level error code.
          .fi