This demo includes three graphical display windows.
The window "Curve: X(t)" displays the curve X(t), the point X(t0),
and the unit tangent and principal normal vectors T(t0) and
P(t0) with their tails at X(t0).
The window "T(t) and P(t)" displays the unit tangent and principal normal
vectors T(t0) and P(t0) and the unit sphere on
which their heads are constrained to lie.
The window "k(t)" displays the graph of k(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.