Anders Englöf Ytterström
b681e5cdb7
Got completely stuck on part 2. Tried some polygon area calculations, but none provided the correct answer, most likely due to the unorthodox polygon points. I also tried _shoelace method_ without any luck. Had not heard about that one earlier, it was a good learning experience even though I vould not use it here. By the subreddit, several people had had luck using the ray method. > Part 2 using one of my favorite facts from > graphics engineering: lets say you have an > enclosed shape, and you want to color every > pixel inside of it. How do you know if a given > pixel is inside the shape or not? Well, it > turns out: if you shoot a ray in any direction > from the pixel and it crosses the boundary an > _odd number_ of times, it's _inside_. if it crosses > an even number of times, it's outside. Works > for all enclosed shapes, even self-intersecting > and non-convex ones. |
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Advent of Code 2023
Solutions for #aoc2023 in Python 3 (3.11.5).
Help scripts
Display all solved puzzles:
python aoc.py
To bootstrap a new puzzle (creates input/<day_no>.txt and output/day_<day_no>.py):
python aoc.py <day_no> <puzzle_name>
Manually copy the puzzle input from https://adventofcode.com and paste it in input/<day_no>.txt
to start coding.
wl-paste > input/<day_no>.txt
Solve separate puzzle (replace XX with the puzzle number):
python -m output.day_XX
Solve separate puzzle using stdin (replace XX with the puzzle number):
wl-paste | python -m output.day_XX
cat tmpfile | python -m output.day_XX
Execute separate puzzle on file save (replace XX with the puzzle number):
ls output/*.py | entr -c -s 'xclip -selection clipboard -o | python -m output.day_XX'
ls output/*.py | entr -c -s 'cat tmpfile | python -m output.day_XX'
ls output/*.py | entr -c -r python -m output.day_XX
(requires entr and wl-paste, Mac users can instead use pbpaste. If you
prefer X at Linux, use xclip -selection clipboard -o).