Counting π prajwalsouza.github.io Dark Mode
An interactive based on a 3Blue1Brown video and G Galperin's work "Playing Pool with π"
Also, if interested, Parabolic Pi constant mystery 		Mass 2 Initial Velocity 2 Initial Velocity 1
Velocity Phase Space
Position Phase Space
Transformed Velocity Phase Space
Transformed Position Phase Space
Connections to light bouncing between two mirrors
Worldline Diagram