pakt19

See /software/p5js/pakt-februari/pakt19/ for a JavaScript version and /software/supercollider/februari-pakt/pakt19/ for accompanying sound code.

use nannou::prelude::*;

const N: usize = 200;

fn main() {
  nannou::app(model)
    .update(update)
    .simple_window(view)
    .size(640, 480)
    .run();
}
struct Model {
  index: f32,
  rad: f32,
  bubbles: Vec<Vec3>,
}
fn model(_app: &App) -> Model {
  let index = 0.0;
  let rad = 25.0;
  let mut bubbles = vec![];
  for _i in 0..N {
    bubbles.push(vec3(0.0, 0.0, 1.0));
  }
  Model {
    index,
    rad,
    bubbles,
  }
}
fn update(app: &App, model: &mut Model, _update: Update) {
  model.index = app.time * 60.0;
  let speed = (model.index * 0.02).sin() * 0.01 + 0.065;
  let disorder = (model.index * 0.0022).sin() * 25.0 + 25.0;
  for (i, b) in model.bubbles.iter_mut().enumerate() {
    let i = i as f32;
    let dxyz = (((i * speed * disorder + model.index) * 0.01).sin() * 0.1 + 0.15) * speed;
    b.x = (b.x + dxyz) % 1.0;
    b.y = (b.y + dxyz) % 1.0;
    b.z = (b.z + dxyz) % 1.0;
  }
}
fn view(app: &App, model: &Model, frame: Frame) {
  let draw = app.draw();
  let win = app.window_rect();
  frame.clear(BLACK);

  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(1.0, 0.3, 0.3)));

    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, b) in model.bubbles.iter().enumerate() {
    let i = i as f32;
    let theta = ((i / N as f32) + (model.index * 0.0001).sin()) * PI * 2.0;
    let p = pt2(
      (theta + ((model.index * 0.0008).sin() * 0.25 + 1.0) * i).sin() * b.x,
      (theta + ((model.index * 0.0012).sin() * 0.25 + 1.0) * i).cos() * b.y,
    ) * win.wh()
      * 0.4;
    let r = model.rad * b.z * 2.0;
    draw.scale_axes(vec3(1.0, -1.0, 1.0))
      .ellipse()
      .xy(p)
      .w_h(r, r)
      .color(rgba(1.0, 1.0, 1.0, 1.0 - b.z));
  }

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