And many "circles" aren't circles either, but 2D torus approximations. The edge of a true circle is made of infinitesimally small points so would be invisible when drawn. And even if you consider a filled circle, how could you be sure you aren't looking at a 1-torus with an infinitessimally small hole? Or an approximation of all the set of all points within a circle?
Titles like this annoy me. If you have something interesting to say - which is the case here - say what it is. No need to obfuscate the topic. It wastes time for everyone.
Anyway, it's kinda hilarious that the only way to make a proper circle in PDFs is with line caps. What a bizarre format. I hope it's succeeded by something better sooner rather than later, I can't think of any time they haven't been a pain to work with.
You should have seen my face when I discovered that it even supports 3D graphics, but you can probably count the functional readers on your fingers... and they're all proprietary.
Honestly not surprised, PDF feels like a taped together format that is at the whims of Adobe, supporting all those exotic features would be hell and I would not want to be in the position of the person who takes care of that. At this point it feels like a shittier website without responsiveness
I've been saying this for years! If properties of a shape cannot be expressed with finite precision then how can that shape exist in a universe with clunky restrictions like the planck length?