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ArrayList particles;
int maxParticles = 255;
void setup() {
size(window.innerWidth, window.innerHeight);
particles = new ArrayList();
rectMode(CENTER);
}
void draw() {
background(21, 32, 46);
if(particles.size() < maxParticles) {
x = random(0, width);
y = random(0, height);
PVector l = new PVector(x, y);
Particle particle = new Particle(l);
particles.add(particle);
}
for(int i=0; i<particles.size(); i++) {
Particle p = (Particle) particles.get(i);
Particle next;
if(i>1) {
next = (Particle) particles.get(i-1);
stroke(57,219,255,10);
line(next.location.x, next.location.x, p.location.x, p.location.y)
}
// Run the particle
p.run();
if(p.isDead()) {
particles.remove(i);
}
}
}
class Particle {
PVector location;
PVector velocity;
PVector acceleration;
float lifespan;
float rectSize;
Particle(PVector l) {
location = l.get();
velocity = new PVector(random(0,0.05),random(0.02, 0.8));
acceleration = new PVector(random(0, 0.01),random(0,0.01));
lifespan = 255.0;
rectSize = 5;
}
void run() {
display();
update();
}
void display() {
noStroke();
fill(73, 219, 255, lifespan/5);
rect(location.x, location.y, rectSize, rectSize);
}
void update() {
lifespan -= 2;
velocity.add(acceleration);
location.add(velocity);
}
boolean isDead() {
if (lifespan < 0) {
return true;
} else {
return false;
}
}
}
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