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Like Pythagoras, Descartes was a mathematician-philosopher; perhaps his most lasting legacy was a mathematical invention—what we now call Cartesian coordinates.

It was on one such morning—as the story goes—while dreamily watching the path of a fly flitting around on the ceiling, that he came up with the xy plane of Cartesian coordinates.

Instead of using stodgy Cartesian coordinates, Black Rock City is organized along polar coordinates, making its coordinate system unique among massive fire-themed desert art festivals.

By tracking, he means that every robot has a camera underneath it, pointing down at a surface made up of tiny, intricate circles that are part of a Cartesian coordinate system.

In particular, he taught his dad that the first step in making a graph is to draw what's called Cartesian coordinates.