Simon completed the Spherical Geometry Coding Challenge by Daniel Shiffman! In this challenge, he created a sphere in Processing (Java) using spherical coordinates and triangle strips. Simon had already tried doing this challenge before but back then he got stuck with the triangle strips.
He had to work with converting Polar coordinates to Cartesian, which basically means converting from radius r and angle θ to the x and y, which Java can understand. Simon intervenes to type this:
x = r * cos(θ)
y = r * sin(θ)
Here is Simon explaining Polar to Cartesian conversion to Dad last night:
The screenshot above come from another video by Daniel Shiffman, explaining Polar to Cartesian conversion.
Here is how Simon built his sphere step by step: