My goal was to make gears with polygons only. The animation is again a rotation of the polygons, no use of images. This is a mathematical "prototype" approach for the simplest case, it's much more complicated in mechanical engeneering (for a first good overview see https://en.wikipedia.org/wiki/Gear).
You can adjust (also while the animation is running)
- N = the num of teeth (2,4,6,8,12,16,24,48) for each of the three gears.
The radius is then set to keep the ratio radius/N = constant (here constant=10).
- the "rotation speed" of millisecs per rotation-step (step is here 48/N degrees).
The average needed times per loop are
- On a Raspberry Pi 2: Around 35|65 ms on LC 6|LC 7,
- On a Raspi B: Around 135|255 ms on LC 6|LC 7.
- On a 2.5 GHz machine: Around 3|7 ms on LC 6|LC 7.
( g*cos(t), g*sin(t) ) where t is the angle ( t=degree*pi/180 )
N2 = N/2 and g = 10*(N2 + tanh(N2*cos(N2*t)*sin(N2*t))) ]
Use it for fun, explore and change the (medium difficult) script.
The stack runs on Mac/Win/Linux using LC 6-8, and on RaspberryPi using (the only available) LC 6.5.1 or 7.0.4