# Tag Info

The link in the comment is excellent. To plot TNB frame to a point you need to a line/arrow from point ($\vec{r}(t)$ to relevant vector, e.g. $\vec{r}(t)+\vec{T}(t)$. There are some indeterminate points (at piecewise junctions but the desired points are well defined). Just for illustration: tang[t_] := r'[t]/Sqrt[r'[t].r'[t]] norm[t_] := ...