The window "Curve: X(t)" displays the curve X(t) with its Frenet Frame, the osculating sphere to the curve at X(t

The windows "Curvature(t)" and "Torsion(t)" graph the curvature and torsion, respectively, of X(t). Note the dependence of the radius of the sphere on these two quantities.

You can change t

As in previous demos there is "Show Color Spectrum" checkbox.