HOW TO DRAW PAPPUS CHAIN
Mouse click inside the canvas to alter the inner outer circle ratio.
SHOW circle stack and inversion circle
HIDE Pappus Chain
The nth circle center is n diameters above the center line. Pop in a few numbers and tap "reinvert". Set to 0 to switch off.
Use to control rotation
This is a Pappus Chain. To draw it you draw a circle stack between 2 lines. Then do a geometric inversion. The lines become the two major circles and the circles become the chain. You can see these with the buttons and hack my code for the inversion. Better still look up the links. The Wikipedia article is fantastic.
MathWorld article on Inversion
MathWorld article on Pappus Chain
Wikipedia article on Pappus Chain
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