GMU:Actors, Traces, Collectives/SS17/Balls

Ball[] ballArray = new Ball[50];

void setup() {
  size(600, 600);
  for (int i =0;i<50;i++){
   ballArray[i] = new Ball(random(6),random(6));
  }
}

void draw() {
  background(255);
    for (int i =0;i<50;i++){
      ballArray[i].update();
      ballArray[i].display(color(200,0,150),color(100,0,150));
    }
}

class Ball {
  PVector position;
  PVector velocity;

  Ball(float vx, float vy) {
    position = new PVector(100, 100);
    velocity = new PVector(vx, vy);
  }

  void update() {
    // Add the current speed to the position.
    position.add(velocity);
    if ((position.x > width) || (position.x < 0)) {
      velocity.x = velocity.x * -1;
    }
    if ((position.y > height) || (position.y < 0)) {
      velocity.y = velocity.y * -1;
    }
  }
  void display(color a, color b){
    stroke(a);
    fill(b);
    ellipse(position.x, position.y, 16, 16);
  }
}