- A torus is specified in the control window.
- The torus is displayed along with parallels on the torus in the "Torus Parallels" window.
- The torus parallels may be changed by changing the value of v0 in the control window.
- Changing the value of t0 chooses a point on the chosen torus parallel.
- The tangent vector T is displayed in red at the chosen point. The normal vector is displayed in blue at the chosen point. The U vector is displayed in magenta at the chosen point.
- The normal curvature along the whole curve is displayed in pink in the "Kn(t)" window.
- The geodesic curvature along the whole curve is displayed in orange in the "Kg(t)" window.
- The geodesic torsion along the whole curve is displayed in cyan in the "Tg(t)" window.
- Readouts in the control window display the normal curvature, geodesic curvature, and geodesic torsion at the chosen point.
- Readouts in the control wind display the total normal curvature,
geodesic curvature, and geodesic torsion along the whole curve.