Voxel/Blocky Spheres (Bán kính 1-12)

A nice way to see how a sphere can be approximated with a lot of squares. Also a good method to understand coordinates in a matrix.

I made these spheres by using a python program I made (https://github.com/mosselini1/Matrix_to_STL) to generate STL files from a Matrix representing a cube arrangement (ideal to make stl files for models made out of blocks) and with a sphere function by norok2 on stackoverflow (https://stackoverflow.com/questions/46626267/how-to-generate-a-sphere-in-3d-numpy-array).