Pendulum oscillation

seen from Dominican Republic
seen from China
seen from Israel

seen from Singapore
seen from Germany

seen from United States
seen from United States
seen from United Kingdom
seen from Senegal
seen from United States
seen from Denmark
seen from Indonesia

seen from Australia
seen from China
seen from United States
seen from China
seen from China
seen from United States

seen from Dominican Republic

seen from United Kingdom
Pendulum oscillation
Silly captions only please.
Two 2D perspectives of a 3D plot of a motion of a ball on a string with alternating string length - shaping a motion track like a distorted "8"...
I am not finished. It's a rough sketch/doodle...It may have errors as well.
I might go into detail at explaining how I find the 3d coordinate points via my pen and paper and imagination method. This is a bit tricky. I will explain it once my focus and ability to form coherent thoughts and sentences is better again.
Understanding math through the act of drawing function plots is another level of satisfaction.
I could write a short script for the calculations of these parametric equations or choose between hundreds of other faster digital options, but I prefer the old-school method of pen and paper - also helps with my poor working memory - so, "two flies catched with one trap", as this idiom goes...
I love 3-dimensional function plots!
(Also: I often choose weird/unconventional ways to portray the concepts, often as result of spontaneous playing with patterns and accompanied occasional eureka-moments.)
Some quick 3d function plot
Title: "Schrödinger's cat chasing the transcending feedback-loop in the moon"
The ingredients:
- toroidal helix wire model
- a broken glass bowl
- lamp
- cat (not included)
Lamp + broken glass bowl:
Lamp + broken glass bowl + toroidal helix wire model:
... plus catto:
... plus catto in motion: