pakt16
See /software/p5js/pakt-februari/pakt16/ for a JavaScript version and /software/supercollider/februari-pakt/pakt16/ for accompanying sound code.
use nannou::prelude::*;
fn main() {
nannou::sketch(view).size(640, 480).run();
}
fn view(app: &App, frame: Frame) {
let draw = app.draw();
let win = app.window_rect();
frame.clear(BLACK);
let index = app.time * 60.0;
let radius1 = (index * 0.013).sin() * 0.3 + 0.1;
let radius2 = (index * 0.021).sin() * 0.2 + 0.25;
let radius3 = (index * 0.012).sin() * 0.1 + 0.4;
let ex1 = (index * 0.0052).sin() * 3.0 + 3.0;
let ex2 = (index * 0.0061).sin() * 6.0 + 6.0;
let ex3 = (index * 0.0053).sin() * 2.0 + 2.0;
let n = (index * 0.001).sin() * 40.0 + 50.0;
for i in 0..n as u16 {
let i = i as f32;
let t = (i / n) * PI * 2.0;
let mut builder = geom::path::Builder::new();
builder = builder.move_to(pt2((t + ex1).sin(), (t + ex1).cos()) * radius1 * win.wh());
builder = builder.quadratic_bezier_to(
vec2((t + ex2).sin(), (t + ex2).cos()) * radius2 * win.wh(),
vec2((t + ex3).sin(), (t + ex3).cos()) * radius3 * win.wh(),
);
let a = ((index + (i * (index * 0.008 + (i * (index * 0.013).sin() * 0.01)).sin() * 2.0))
* 0.1)
.sin()
* 0.5
+ 0.5;
let path = builder.build();
draw.scale_axes(vec3(1.0, -1.0, 1.0))
.path()
.stroke()
.color(rgba(1.0, 1.0, 1.0, a))
.weight(1.0)
.events(path.iter());
}
draw.to_frame(app, &frame).unwrap();
}