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+# ndoom
+
+An experiment in seeing how far a shell script can be pushed: a Wolfenstein-style raycaster written entirely in zsh, doing its trigonometry through `bc -l` and rendering the result as ASCII art in the terminal.
+
+`ndoom.sh` casts 91 rays across a fixed 8x8 hardcoded map, walking each one out step by step and writing its hit distance to a plain file called `distances`. `render.sh` reads that file back and draws one ASCII frame from it — closer walls as `#`, a floor tint below a `height` line, and blank sky above it. It's a single-frame renderer rather than a live game: the loop that would tie the two scripts together into an actual playable frame-by-frame walk is written but commented out in `ndoom.sh`, so right now it's run as two separate steps by hand.
+
+Mostly just curious to see whether shell arithmetic and `bc` could stand in for the floating-point trig a raycaster needs — turns out yes, just very, very slowly.
+
+## Running
+
+```sh
+./ndoom.sh      # casts rays, writes ./distances
+./render.sh     # reads ./distances, draws one ASCII frame
+```
+
+Needs `zsh` and `bc`.