95 lines
2.4 KiB
JavaScript
95 lines
2.4 KiB
JavaScript
let count = 1000;
|
|
|
|
var particles_a = [];
|
|
var particles_b = [];
|
|
var particles_c = [];
|
|
var fade = 200;
|
|
var radius = 3;
|
|
|
|
const w = window.innerWidth;
|
|
const h = 600;
|
|
|
|
let noiseScale = 10;
|
|
let noiseStrength = 1.2;
|
|
|
|
function setup() {
|
|
createCanvas(windowWidth, windowHeight);
|
|
noStroke();
|
|
|
|
for (let i=0; i<count; i++) {
|
|
let loc_a = createVector(random(w) + windowWidth*0.5 - w*0.5, random(h) + windowHeight*0.5 -h*0.5, 2);
|
|
let angle_a = random(TWO_PI);
|
|
let dir_a = createVector(cos(angle_a), sin(angle_a));
|
|
|
|
let loc_b = createVector(random(w) + windowWidth*0.5 - w*0.5, random(h) + windowHeight*0.5-h*0.5, 2);
|
|
let angle_b = random(TWO_PI);
|
|
let dir_b = createVector(cos(angle_b), sin(angle_b));
|
|
|
|
let loc_c = createVector(random(w) + windowWidth*0.5 - w*0.5, random(h) + windowHeight*0.5-h*0.5, 2);
|
|
let angle_c = random(TWO_PI);
|
|
let dir_c = createVector(cos(angle_c), sin(angle_c));
|
|
|
|
particles_a[i] = new Particle(loc_a, dir_a, 0.5);
|
|
particles_b[i] = new Particle(loc_b, dir_b,0.6);
|
|
particles_c[i] = new Particle(loc_c, dir_c, 0.75);
|
|
}
|
|
}
|
|
|
|
|
|
function draw() {
|
|
fill(0,5);
|
|
noStroke();
|
|
rect(0,0,width, height);
|
|
|
|
for (let i=0; i<count; i++) {
|
|
|
|
fill(191, 19, 99, fade);
|
|
particles_a[i].move();
|
|
particles_a[i].update(radius);
|
|
particles_a[i].checkEdges();
|
|
|
|
fill (57,166,163, fade);
|
|
particles_b[i].move();
|
|
particles_b[i].update(radius);
|
|
particles_b[i].checkEdges();
|
|
|
|
fill(222,238,234,fade);
|
|
particles_c[i].move();
|
|
particles_c[i].update(radius);
|
|
particles_c[i].checkEdges();
|
|
}
|
|
}
|
|
|
|
let Particle = function(loc_, dir_, speed_) {
|
|
this.loc = loc_;
|
|
this.dir = dir_;
|
|
this.speed = speed_;
|
|
this.d = 1;
|
|
}
|
|
|
|
Particle.prototype.run = function() {
|
|
this.move();
|
|
this.checkEdges();
|
|
this.update();
|
|
}
|
|
|
|
Particle.prototype.update = function(r) {
|
|
ellipse(this.loc.x, this.loc.y, r);
|
|
}
|
|
|
|
Particle.prototype.checkEdges = function() {
|
|
if (this.loc.x < 0 || this.loc.x > width || this.loc.y < 0 || this.loc.y > height) {
|
|
this.loc.x = random(w) + windowWidth*0.5 - w*0.5;
|
|
this.loc.y = random(h) + windowHeight*0.5 - h*0.5;
|
|
}
|
|
}
|
|
|
|
Particle.prototype.move = function() {
|
|
this.angle = noise(this.loc.x/noiseScale, this.loc.y/noiseScale, frameCount/noiseScale) * TWO_PI*noiseStrength;
|
|
this.dir.x = cos(this.angle) + sin(this.angle) - sin(this.angle);
|
|
this.dir.y = sin(this.angle) - cos(this.angle)*sin(this.angle);
|
|
this.vel = this.dir.copy();
|
|
this.vel.mult(this.speed*this.d);
|
|
this.loc.add(this.vel);
|
|
}
|