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pakt11

See /software/p5js/pakt-februari/pakt11/ for a JavaScript version and /software/supercollider/februari-pakt/pakt11/ for accompanying sound code.

use nannou::prelude::*;

fn main() {
    nannou::app(model).update(update).simple_window(view).size(640, 480).run();
}
struct Model {
    index: f32,
    rows_mid: f32,
    cols_mid: f32,
}
fn model(_app: &App) -> Model {
    let index = 0.0;
    let rows_mid = 22.0;
    let cols_mid = 20.0;
    Model { index, rows_mid, cols_mid }
}
fn update(app: &App, model: &mut Model, _update: Update) {
    model.index = app.time * 60.0;
}
fn view(app: &App, model: &Model, frame: Frame) {
    let draw = app.draw();
    let win = app.window_rect();
    
    let rad = win.h();
    for angle in 0..360 {
        let angle = angle as f32;
        let mut points = Vec::new();
        points.push((pt2(0.0, 0.0), rgb(0.6, 0.5, 0.5)));
        
        let vx = angle.to_radians().cos();
        let vy = angle.to_radians().sin();
        points.push((pt2(vx, vy) * rad, rgb(0.0, 0.0, 0.0)));
        
        let next_vx = (angle + 1.0).to_radians().cos();
        let next_vy = (angle + 1.0).to_radians().sin();
        points.push((pt2(next_vx, next_vy) * rad, rgb(0.0, 0.0, 0.0)));
        
        draw.polygon().points_colored(points);
    }
    
    let rows = model.rows_mid + ((model.index * 0.0015).sin() * 10.0);
    let cols = model.cols_mid + ((model.index * 0.0024).sin() * 10.0);
    let mut builder = geom::path::Builder::new();
    builder = builder.move_to(pt2(0.0, 0.0));
    for y in 0..=rows as u32 {
        let y = y as f32;
        for x in 0..=cols as u32 {
            let x = x as f32;
            
            let p = pt2(
                (x / rows * win.w()) + (model.index + (x * y) * 32.0).sin(),
                (y / cols * win.h()) + (model.index + (x * y) * 24.0).cos(),
            );
            builder = builder.line_to(p);
            
            let p = pt2(
                (x / cols * win.w()) + (model.index + (x * y) * 32.0).sin(),
                (y / rows * win.h()) + (model.index + (x * y) * 24.0).cos(),
            );
            builder = builder.line_to(p);
        }
    }
    let path = builder.build();
    draw.scale_axes(vec3(0.96, -0.96, 1.0)).translate(vec3(win.w() * -0.5 - 5.0, win.h() * -0.5 - 5.0, 0.0))
    .path().fill().color(WHITE).events(path.iter());
    
    draw.to_frame(app, &frame).unwrap();
}