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k-d forests

An implementation of k-d forests.

This code generates images containing every possible color, in the style of this Code Golf answer by József Fejes. Colors are placed on the image one by one, next to the closest pixel already filled in.

Images

The full 24-bit, 4096×4096 image is generated by default, which takes a while:

$ cargo run --release
Generating a 4096x4096 image (16777216 pixels)
100.00%  |  159 kpx/s  | max frontier size: 267592

To try it out quickly, generate an image with reduced bit depth:

$ cargo run --release -- -b19
Generating a 1024x512 image (524288 pixels)
100.00%  |  285 kpx/s  | max frontier size: 18719

There are many flags that control the order colors are placed, and how the location for each color is selected. Pass --help to see the available options.

Video

To make a video of the generation process, pass the -a/--animate flag, and pipe the output into ffmpeg. For example:

$ cargo run --release -- -b23 -w3840 -h2160 -a | ffmpeg -f image2pipe -r 60 -i - -c:v libx265 -x265-params lossless=1 kd-forest.mkv

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An implementation of k-d forests

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