Chaos game: Difference between revisions

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=={{header|Rust}}==

Dependencies: image, rand

<lang rust>~~extern crate image;~~

extern crate image;

extern crate rand;

use ~~std~~::fs::~~File~~;

use rand::prelude::*;

use rand::Rng;

use std::f32;

fn main() {

let max_iterations = ~~50_000u32~~;

let max_iterations = 50_000;

let img_side = ~~800u32~~;

let img_side = 800;

let tri_size = ~~400f32~~;

let tri_size = 400.0;

// Create a new ImgBuf

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// Create triangle vertices

let mut vertices: [[f32; 2]; 3] = [[~~0f32~~, ~~0f32~~]; 3];

let mut vertices: [[f32; 2]; 3] = [[0.0, 0.0]; 3];

for i in 0..vertices.len() {

vertices[i][0] =

vertices[i][0] = (img_side as f32 / 2.0)

~~(img_side as f32 / 2.)~~ + (tri_size / 2.) * (f32::consts::PI * i as f32 * 2. / 3.).cos();

+ (tri_size / 2.0) * (f32::consts::PI * i as f32 * 2.0 / 3.0).cos();

vertices[i][1] =

vertices[i][1] = (img_side as f32 / 2.0)

~~(img_side as f32 / 2.)~~ + (tri_size / 2.) * (f32::consts::PI * i as f32 * 2. / 3.).sin();

+ (tri_size / 2.0) * (f32::consts::PI * i as f32 * 2.0 / 3.0).sin();

}

for v in &vertices {

imgbuf.put_pixel(v[0] as u32, v[1] as u32, image::Luma([255u8]));

}

println!("Verticies: {:?}", vertices);

// Iterate chaos game

let mut rng = rand::~~weak_rng~~();

let mut rng = rand::thread_rng();

let mut x = img_side as f32 / 2.;

let mut x = img_side as f32 / 2.0;

let mut y = img_side as f32 / 2.;

let mut y = img_side as f32 / 2.0;

for _ in 0..max_iterations {

let choice = rng.gen_range(0, vertices.len());

let choice = rng.gen_range(0..vertices.len());

x = (x + vertices[choice][0]) / 2.;

x = (x + vertices[choice][0]) / 2.0;

y = (y + vertices[choice][1]) / 2.;

y = (y + vertices[choice][1]) / 2.0;

imgbuf.put_pixel(x as u32, y as u32, image::Luma([255u8]));

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// Save image

~~let fout = &mut File::create~~("fractal.png").unwrap();

imgbuf.save("fractal.png").unwrap();

}

image::ImageLuma8(imgbuf).save(fout, image::PNG).unwrap();

}</lang>

</lang>

=={{header|Scala}}==