76 lines
2.3 KiB
Rust
76 lines
2.3 KiB
Rust
use anyhow::{Context, Result};
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use enkou_shaders::Coefficients2;
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use enkou_shaders::camera::Camera;
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use enkou_shaders::chaos_game::ChaosGame;
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use enkou_shaders::transform::Transform;
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use glam::{Affine2, Vec2, uvec2, UVec2};
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use image::{GrayImage, Luma};
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use rand::SeedableRng;
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use rand_xoshiro::Xoshiro256StarStar;
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use std::mem;
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use std::process::Command;
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use tempfile::{NamedTempFile};
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const ITERATIONS: u32 = 50_000;
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const ITERATIONS_DISCARD: u32 = 20;
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const IMAGE_DIMENSION: UVec2 = uvec2(600, 600);
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pub fn main() -> Result<()> {
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let seed: u64 = 4; // chosen by fair dice roll
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let mut rng = Xoshiro256StarStar::seed_from_u64(seed);
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let transforms = [
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// F_0: (x / 2, y / 2)
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Transform::new(Affine2::from_coefficients(0.5, 0.0, 0.0, 0.0, 0.5, 0.0)),
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// F_1: ((x + 1) / 2, y / 2)
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Transform::new(Affine2::from_coefficients(0.5, 0.0, 0.5, 0.0, 0.5, 0.0)),
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// F_2: (x / 2, (y + 1) / 2)
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Transform::new(Affine2::from_coefficients(0.5, 0.0, 0.0, 0.0, 0.5, 0.5)),
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];
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let weights = [1.0 / 3.0, 1.0 / 3.0, 1.0 / 3.0];
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let mut image = GrayImage::new(IMAGE_DIMENSION.x, IMAGE_DIMENSION.y);
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// The gasket is defined on the range [0, 1] for both X and Y
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let camera = Camera::new(
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IMAGE_DIMENSION,
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Vec2::ONE * 0.5,
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0.0,
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Vec2::ZERO,
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IMAGE_DIMENSION.as_vec2(),
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);
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let mut chaos_game = ChaosGame::new(&mut rng, &transforms, &weights);
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for i in 0..ITERATIONS {
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let next_point = chaos_game.next().unwrap();
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if i < ITERATIONS_DISCARD {
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continue;
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}
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if let Some(next_point) = camera.transform_point_to_image(next_point) {
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image.put_pixel(next_point.x, next_point.y, Luma([255u8]))
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}
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}
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let temp = NamedTempFile::with_suffix(".png").context("Unable to create file for image")?;
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image.save(temp.path()).context("Unable to save image")?;
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let open_program = cfg_select! {
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unix => "xdg-open",
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_ => panic!("Unknown system"),
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};
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Command::new(open_program)
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.arg(temp.path())
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.spawn()?
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.wait()?;
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// In case the image viewer forks and gives control back prior to reading the file,
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// drop it and don't run the constructor
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mem::forget(temp);
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Ok(())
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}
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