See Section 25.10.6 for parametric equations in three-dimensional geometry.
The parameq command finds a parametric equation for a curve.
Note that t must be a formal variable, it may be necessary to purge it with purge(t).
parameq(line(-1,i)) |
|
parameq(circle(-1,i)) |
|
normal(parameq(ellipse(-1,1,i))) |
|