Paraboloid of Scad Cylinders

I found some paraboloids on thingiverse, but none that were written in a short way. Though this scad script is only 26 lines long, it makes a smooth paraboloid, but the rendering time is long. That's openscad's fault!

It's just a loop of scad cylinders. scad cylinders can be chopped off cones , which is what we're using here. The radius is proportional to the square root of the height. People should learn how to integrate this way in calc 2.

The main disadvantage of this is that scad is cr