paramete.spad line 110 [edit on github]
ParametricSurface is used for plotting parametric surfaces in affine 3-space.
coordinate(s, i)
returns a coordinate function of s
using 1-based indexing according to i
. This indicates what the function for the coordinate component, i
, of the surface is.
surface(c1, c2, c3)
creates a surface from 3 parametric component functions c1
, c2
, and c3
.