pakt07
See /software/p5js/pakt-februari/pakt07/ for a JavaScript version and /software/supercollider/februari-pakt/pakt07/ for accompanying sound code.
use nannou::prelude::*;
const N: u16 = 30;
fn main() {
nannou::app(model)
.update(update)
.simple_window(view)
.size(640, 480)
.run();
}
struct Model {
theta: f32,
speed: f32,
spread: f32,
points: Vec<Vec2>,
}
fn model(_app: &App) -> Model {
let theta = 0.0;
let speed = 0.00002;
let spread = 1.0;
let mut points = vec![];
for _i in 0..N {
points.push(pt2(0.0, 0.0));
}
Model {
theta,
speed,
spread,
points,
}
}
fn update(app: &App, model: &mut Model, _update: Update) {
let win = app.window_rect();
for (i, p) in model.points.iter_mut().enumerate() {
let i = i as f32;
let x = p.x / win.w();
let y = p.y / win.h();
p.x = (((model.theta + (i * 0.001)).cos() * x) - ((model.theta + (i * 0.001)).sin() * y))
* win.w()
+ model.spread;
p.y = (((model.theta + (i * 0.001)).cos() * y) + ((model.theta + (i * 0.001)).sin() * x))
* win.h()
+ model.spread;
model.theta += model.speed;
}
}
fn view(app: &App, model: &Model, frame: Frame) {
let draw = app.draw();
frame.clear(BLACK);
for p in model.points.iter() {
draw.scale_axes(vec3(1.0, -1.0, 1.0))
.color_blend(BLEND_SUBTRACT)
.ellipse()
.xy(*p)
.radius(50.0)
.color(RED);
}
draw.to_frame(app, &frame).unwrap();
}