2011

■ Chord - The chord-length method spaces the knots connecting each
component curve to be proportional to the distances between each
associated pair of fit points. An example is the green curve in the
illustration.
■ Square Root - Also called centripetal parameterization, this method spaces
the knots connecting each component curve to be proportional to the
square root of the distance between each associated pair of fit points. This
method usually produces “gentler” curves. An example is the blue curve
in the illustration.
■ Uniform - Also called equidistant, this method spaces the knots of each
component curve to be equal, regardless of the spacing of the fit points.
This method often produces curves that overshoot the fit points. An
example is the magenta curve in the illustration.
Start Tangency Specifies a tangent condition on the starting point of the
spline.
End Tangency Specifies a tangent condition on the ending point of the spline.
990 | Chapter 19 S Commands