Unknown macro: {alias}
Name
bsp — B-spline visualization
Syntax
bsp [size] [q | cm | cm2] [lin] [sav [nodraw] ] [nst] [col] ; # draw b-spline
Description
Draw a b-spline curve close to the points in active workspace. The curve will not interpolate the input points, but follows the control polygon that goes between the input points which are the knot points in the curve.
Arguments
size
q
cm
cm2
lin
sav [nodraw]
nst number
col
Examples
Ex.1: Drawing a b-spline curve
# Digitize points and draw a b-spline
rcd ;# digitize 5 points
u ;# stop digitizing
poi ;# display points
pol ;# display line polygons
bsp ;# draw a b-spline
The above example produces this image.
B-spline curve with the control polygon
See also
cur - Curve display, spl - Spline generation, pol - Polygon type display