Five Easy Pieces

Rotating truncation of the tetrahedron.

@shonk Super smooth animation, striking color choice... and it's not every day I see "Haversine" in use. (In fact, I'm not sure I've ever seen haversine anywhere except rather old textbooks and tables of trigonometric values)

@jsiehler Haversine is actually surprisingly useful if you want to smoothly interpolate between $$f(0)=0, f'(0)=0$$ and $$f(a)=1,f'(a)=0$$.

I also sometimes use the polynomial smoothstep/smootherstep/smootheststep functions: en.wikipedia.org/wiki/Smoothst

A Mastodon instance for maths people. The kind of people who make $$\pi z^2 \times a$$ jokes. Use $$ and $$ for inline LaTeX, and $ and $ for display mode.