pakt03

See /software/p5js/pakt-februari/pakt03/ for a JavaScript version and /software/supercollider/februari-pakt/pakt03/ for accompanying sound code.

use nannou::prelude::*;

const N: u16 = 50;

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 spreadx = (index * 0.005).sin();
  let spready = (index * 0.011).sin();
  let phaseshift = (index * 0.001).sin() * PI * 2.0;
  let wx = win.w() * 0.4 * ((index * 0.004).sin() * 0.45 + 0.55);
  let hy = win.h() * 0.4 * ((index * 0.004).sin() * 0.45 + 0.55);

  let rad = win.h();
  for angle in 0..360 {
    let angle = angle as f32;
    let mut points = Vec::with_capacity(3);
    points.push((pt2(0.0, 0.0), rgb(0.7, 0.6, 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);
  }

  for i in 0..N {
    let i = i as f32;
    let r = (i / N as f32 * 30.0 + 1.0) * 2.0;

    let mut p = 0.0;
    let x = ((index + (i * spreadx)) * 0.05 + p).sin() * wx;
    let y = ((index + (i * spready)) * 0.05 + p).cos() * hy;
    draw.scale_axes(vec3(1.0, -1.0, 1.0))
      .ellipse()
      .x_y(x, y)
      .w_h(r, r)
      .color(rgba(1.0, 1.0, 1.0, 0.5));

    p += phaseshift;
    let x = ((index + (i * spreadx)) * 0.05 + p).sin() * wx;
    let y = ((index + (i * spready)) * 0.05 + p).cos() * hy;
    draw.scale_axes(vec3(1.0, -1.0, 1.0))
      .ellipse()
      .x_y(x, y)
      .w_h(r, r)
      .color(rgba(0.0, 0.0, 1.0, 0.5));

    /*
    p += phaseshift;
    let x = ((index + (i * spreadx)) * 0.05 + p).sin() * wx;
    let y = ((index + (i * spready)) * 0.05 + p).cos() * hy;
    draw.scale_axes(vec3(1.0, -1.0, 1.0))
    .ellipse().x_y(x, y).w_h(r, r).color(rgba(0.0, 1.0, 0.0, 0.5));

    p += phaseshift;
    let x = ((index + (i * spreadx)) * 0.05 + p).sin() * wx;
    let y = ((index + (i * spready)) * 0.05 + p).cos() * hy;
    draw.scale_axes(vec3(1.0, -1.0, 1.0))
    .ellipse().x_y(x, y).w_h(r, r).color(rgba(1.0, 0.0, 0.0, 0.5));

    p += phaseshift;
    let x = ((index + (i * spreadx)) * 0.05 + p).sin() * wx;
    let y = ((index + (i * spready)) * 0.05 + p).cos() * hy;
    draw.scale_axes(vec3(1.0, -1.0, 1.0))
    .ellipse().x_y(x, y).w_h(r, r).color(rgba(0.0, 0.0, 0.0, 0.5));
    */
  }

  draw.to_frame(app, &frame).unwrap();
}