Update day09.rs #14
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Update day09.rs #14
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Strategy for length heuristic combined with AABB collision detection. This heuristic specializes to the AoC input generation and doesn't generalize to any input shape generation. One of the points is always on a massive horizontal distance compared to adjacent points. If the input were rotated 90 degrees, this solution would stop working. this means we don't need to compare every vertex to every other vertex, we can compare a handful to the others. This idea can probably be taken further yet.
crate unused and included rect_area fn
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| Thanks for the PR! We could go even further, for all input I've seen not only is the notch from from the left (smaller x) so the maximum point is always either the top or bottom of the notch on the right hand side. Also the notch always seem to be always index 248 and 249. For part we could also split the input into above and below the notch, then do a pairwise check between the two halves. This would still be n^2 complexity but with half the n for a 4x speedup. |
maneatingape force-pushed the main branch 3 times, most recently from e6e7b41 to 92f82f8 Compare 
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Strategy for length heuristic combined with AABB collision detection.
This heuristic specializes to the AoC input generation and doesn't generalize to any input shape generation.
One of the points is always on a massive horizontal distance compared to adjacent points. If the input were rotated 90 degrees, this solution would stop working.
this means we don't need to compare every vertex to every other vertex, we can compare a handful to the others.
This idea can probably be taken further yet.