47 lines
1.3 KiB
Rust
47 lines
1.3 KiB
Rust
use image::{ImageBuffer, Rgba, RgbaImage};
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use std::f64::consts::PI;
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use std::fs;
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fn chladni(x: f64, y: f64, n: f64, m: f64, eps: f64) -> f64 {
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(n * PI * x).cos() * (m * PI * y).cos() + eps * (m * PI * x).cos() * (n * PI * y).cos()
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}
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fn generate_png(n: u32, m: u32, width: u32, height: u32, eps: f64) {
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let mut img: RgbaImage = ImageBuffer::new(width, height);
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for (x, y, pixel) in img.enumerate_pixels_mut() {
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// Centrage
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let xf = (x as f64 / width as f64) * 2.0 - 1.0;
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let yf = (y as f64 / height as f64) * 2.0 - 1.0;
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let val = chladni(xf, yf, n as f64, m as f64, eps);
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let bright = if val.abs() < 0.08 { 255 } else { 0 }; // Sans variation d'alpha
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// let intensity = val.abs();
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// let bright = (((0.08 - intensity).max(0.0) / 0.08) * 255.0) as u8;
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*pixel = Rgba([0, 0, 0, bright]);
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// *pixel = Rgb([brigh, brigh, brigh]);
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}
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let filename = format!("out/chladni_{}_{}_{}.png", n, m, eps);
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img.save(&filename).unwrap();
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println!("{}", filename);
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}
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fn main() {
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let width = 1000;
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let height = 1000;
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let max_n = 300;
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let max_m = 300;
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fs::create_dir_all("out").expect("Erreur");
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for n in 1..max_n {
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for m in 1..max_m {
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generate_png(n, m, width, height, -1.0);
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generate_png(n, m, width, height, 1.0);
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}
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}
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}
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