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pakt17

See /software/p5js/pakt-februari/pakt17/ for a JavaScript version and /software/supercollider/februari-pakt/pakt17/ for accompanying sound code.

use nannou::prelude::*;

const N: u16 = 45;

fn main() {
    nannou::sketch(view).size(640, 480).run();
}

fn view(app: &App, frame: Frame) {
    let draw = app.draw();
    let win = app.window_rect();
    
    let index = app.time * 60.0;
    let spread = (index * 0.004).sin() * 5.0 + 6.0;
    
    draw.background().color(BLACK);
    
    for i in 0..N {
        let i = i as f32;
        let ii = i * spread + index;
        let a = (ii * (index * 0.0050 + (index * 0.0074 + 1.0).sin() + 1.0).sin() * 0.0075 + 1.0).sin() * 0.25 + 0.5;
        let b = (ii * (index * 0.0051 + (index * 0.0073 + 2.0).sin() + 2.0).sin() * 0.0075 + 2.0).sin() * 0.25 + 0.5;
        let c = (ii * (index * 0.0052 + (index * 0.0072 + 3.0).sin() + 3.0).sin() * 0.0075 + 3.0).sin() * 0.25 + 0.5;
        let d = (ii * (index * 0.0053 + (index * 0.0071 + 4.0).sin() + 4.0).sin() * 0.0075 + 4.0).sin() * 0.25 + 0.5;
        draw.scale_axes(vec3(1.0, -1.0, 1.0)).translate(vec3(win.w(), win.h(), 0.0) * -0.5)
        .rect().xy(pt2(a, b) * win.wh()).wh(pt2(c - a, d - b) * win.wh()).color(rgba(a, b, c, d));
    }
    
    draw.to_frame(app, &frame).unwrap();
}