Parametric Equation - Parametric Surfaces

Parametric Surfaces

A torus with major radius R and minor radius r may be defined parametrically as

where the two parameters t and u both vary between 0 and 2π.

• R=2, r=1/2

As u varies from 0 to 2π the point on the surface moves about a short circle passing through the hole in the torus. As t varies from 0 to 2π the point on the surface moves about a long circle around the hole in the torus.