I would like to draw figures in 2D…
for example, the parametric equations of a circle…
x=r* cos t
y=r *sin t
you can obtain the Cartesian coordinates which can be given by
x^2+y^2 < r^2
and then for each (x,y) coordinates which obey the last formula you draw a circle in a plain.
With the cone I know…
The circular base has z=0,x2+y2<r2. The curved surface has x2+y2=(r-(rz/h))2, for z in the range [0, h].
x = ((h-u)/h) * r * cos theta
y = ((h-u)/h) * r * sin theta
z = u
where u (0,h) y theta (0,2pi)
The question how can I obtain a formula/s in Cartesian coordinates that allows me to draw it?
It is a good challenge…