Parametric surface $\mathbf{r}(u,v)$ rendered in 3-space with normal-based lighting
This program displays a surface defined by a parametric equation r(u,v) = (x(u,v), y(u,v), z(u,v)), mapping a rectangular parameter domain into R3. Parametric surfaces generalize parametric curves to two dimensions and include spheres, tori, and other surfaces that cannot be expressed as graphs z = f(x,y). The surface is rendered with lighting computed from the normal vector r_u x r_v.
Controls: Click and drag to orbit, scroll to zoom.
