3D Galaxy

ArrayList particles = new ArrayList();

​

void setup(){

  size(640, 640, P3D);

  noFill();

  frameRate(20);

}

​

void draw(){

  background(0);

  translate(width/2, height/2);

  rotateX(radians(1+mouseY/3));

  rotateY(radians(1+mouseX/3));

  rotateZ(radians(90));

  for(int i = 0; i < 10; i++){

    float zDiff = random(-0.08, 0.08);

    float xyDiff = random(-50, 50);

    /* Use when it isn't in javascript mode */

    //float xyDiff = noise(i+frameCount)*150;

    particles.add(new Particle(new PVector(sin(radians(xyDiff+frameCount*4))*1.5, zDiff, cos(radians(xyDiff+frameCount*4))*1.5)));

    particles.add(new Particle(new PVector(-sin(radians(xyDiff+frameCount*4))*1.5, zDiff, -cos(radians(xyDiff+frameCount*4))*1.5)));

  }

  for(int i = 0; i < particles.size(); i++){

    Particle p = (Particle) particles.get(i);

    pushMatrix();

    p.draw();

    popMatrix();

    p.move(); 

  }

}

​

class Particle {

  PVector loc, vel;

  float life = random(100, 170);

  float maxLife = life;

  Particle(PVector vel){

    loc = new PVector(0, 0, 0);

    this.vel = vel;

  }

  void draw(){

    translate(loc.x, loc.y, loc.z);

    float gAndA = map(life, 0, maxLife, 0, 255);

    stroke(map(life, 0, maxLife, 150, 255), gAndA, map(life, 0, maxLife, 255, 0), gAndA);

    strokeWeight(map(life, 0, maxLife, 5, 1));

    point(0, 0, 0);

    life--;

    if(life <= 0){

      particles.remove(this); 

    }

  }

  void move(){

    loc.add(vel); 

  }

}

​

​

​