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Writing Toy Software Is a Joy

You should write more toy programs

Additional challenges include writing an in-memory filesystem, user mode and process isolation, loading ELF executables, and supporting enough video hardware to render a GUI. Additional complexity involves properly implementing clipping, a Z-buffer, N-gon rasterisation, perspective-correct texture-mapping, Phong or Gouraud shading, shadow-mapping, etc. Additional complexity comes with implementing more precise and faster integration methods, accounting for relativistic effects, and plugging in real numbers from NASA to predict the next high tide or full moon.

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