This demo includes three graphical display windows.
The window "Curve: X(t)" displays the curve X(t), and its Frenet Frame.
The window "Unit Tangent (T), Unit Normal (P), and Unit Binormal (B)"
displays the Frenet Frame at the origin,
and B'(t0), the derivative of B(t) evaluated at t0,
with its tail starting at the head of B(t0).
The window "Torsion(t)" graphs the torsion of X(t).
You can change t0 and X(t) in the control window. The
includes a list of functions that you can use for X(t), along with
parameters used to define those functions.
As in previous demos there is a "Show Color Spectrum" checkbox.