wiki-moire.rs

1use mrlycore::errors::Result;2use mrlyfig::{ink, save, Board};3use mrlynum::factor::gcd;45const SCALES: (usize, usize) = (5, 7);67fn marks(n: usize) -> Vec<f64> {8    (0..=n).map(|k| k as f64 / n as f64).collect()9}1011fn main() -> Result<()> {12    let (small, large) = SCALES;13    let common = gcd(small, large);14    let shared = marks(common);15    let thin = marks(small);16    let thick = marks(large);17    let mut crossings: Vec<(f64, f64)> = Vec::new();18    for &x in &thin {19        for &y in &thick {20            crossings.push((x, y));21            if !thin.contains(&y) || !thick.contains(&x) {22                crossings.push((y, x));23            }24        }25    }26    assert_eq!(common, 1);27    assert_eq!(shared.len(), 2);28    assert_eq!(crossings.len(), 92);2930    let mut board = Board::square();31    let frame = board.frame(0.10);32    let at = |u: f64, v: f64| (frame.x + u * frame.w, frame.y + v * frame.h);33    for &u in &thin {34        let (x, top) = at(u, 0.0);35        let (left, y) = at(0.0, u);36        board.segment((x, top), (x, top + frame.h), 5.0, ink::blue());37        board.segment((left, y), (left + frame.w, y), 5.0, ink::blue());38    }39    for &u in &thick {40        let (x, top) = at(u, 0.0);41        let (left, y) = at(0.0, u);42        board.segment((x, top), (x, top + frame.h), 5.0, ink::orange());43        board.segment((left, y), (left + frame.w, y), 5.0, ink::orange());44    }45    for &(u, v) in &crossings {46        let (x, y) = at(u, v);47        board.disc(x, y, frame.w * 0.010, ink::fade(ink::dim(), 0.9));48    }49    for &u in &shared {50        for &v in &shared {51            let (x, y) = at(u, v);52            board.disc(x, y, frame.w * 0.035, ink::yellow());53        }54    }55    save("wiki-moire", &board)?;56    Ok(())57}