An Interesting Stereographic Projection

This is an interesting stereographic projection that you get when you rotate 90-degree Steiner circles about their axis of symmetry. Animated GIF; you may need to click on it for running: This is an example LaTeX file for a particular value of \animationparameter, that you can run yourself here in the browser: \documentclass[ tikz ,border = 3.14mm ]{standalone} \usepackage{tikz-3dplot}…