3D Printing Slicer

A 3D printing slicer built from scratch in Python in 24 hours, taking an STL model and producing the G-code a printer actually runs. It cuts the mesh into layers triangle by triangle, fills each layer with a gyroid infill pattern, and renders the result in a simulator so you can see what the printer will do before committing filament to it. Written with numpy, shapely and Qt, with no slicing library underneath any of it.