gen_nurbs_interp — Create control data of a NURBS curve that interpolates given points.
gen_nurbs_interp creates the NURBS control data
CtrlRows, CtrlCols, and Knots of a NURBS
curve that interpolates the input points (Rows, Cols).
If the input point list is not closed (i.e., the first point is identical to
the last point), the tangents of the first and last point must be given
in Tangents in the order [drow_0,dcol_0,drow_n-1,dcol_n-1]
(for closed point lists, Tangents must be an empty tuple).
Furthermore the Degree of the NURBS curve must be specified.
The output of gen_nurbs_interp can be used directly with
gen_contour_nurbs_xld with the weights vector set to
'auto'.
See the documentation of gen_contour_nurbs_xld for more information
on NURBS curves.
Rows (input_control) coordinates.y-array → (real)
Row coordinates of input point list.
Number of elements: Rows == Cols
Cols (input_control) coordinates.x-array → (real)
Column coordinates of input point list.
Number of elements: Cols == Rows
Tangents (input_control) real-array → (real)
Tangents at first and last point.
Default value: []
Degree (input_control) integer → (integer)
Order of the output curve.
Default value: 3
Suggested values: 2, 3, 4, 5
Restriction: Degree >= 2
CtrlRows (output_control) coordinates.y-array → (real)
Row coordinates of the control polygon.
CtrlCols (output_control) coordinates.x-array → (real)
Column coordinates of the control polygon.
Number of elements: Cols == Rows
Knots (output_control) real-array → (real)
The knot vector of the output curve.
If all input parameters are correct gen_nurbs_interp returns the
value 2 (H_MSG_TRUE).
draw_nurbs_interp,
draw_nurbs_interp_mod
L. Piegl, W. Tiller: ”The NURBS Book”, 2nd Edition, Springer, 1997.
Foundation