Hacker News new | ask | show | jobs
by chris_va 3618 days ago
If you had a specific design in mind, it might actually be more satisfying to generate the STL triangles directly. You can fit your parabola in 2D (by, say, computing reflection angle to a fixed focal point), then just rotate and dump out STL.

The wiki has a nice intro to the subject:

https://en.wikipedia.org/wiki/Parabolic_reflector