class Ball{
  int col;
  Particle me;
  Ball(){
    col = int(random(2));
    me = physics.makeParticle(1.0, width / 2, 0, 0);
  }
  void draw(){
    update();
    noStroke();
    fill(colorTable[col]);
    ellipse(me.position().x(), me.position().y() - 20, 20, 20);
    fill(0);
    ellipse(me.position().x(), me.position().y() - 20, 10, 10);
  }
  void update(){
    //figure which column the ball is in -
    int column = constrain((int)me.position().x() / graph.columnWidth, 0, graph.columns - 1);
    if(me.position().y() > graph.blanket[column].position().y()){
      me.moveTo(me.position().x(), graph.blanket[column].position().y() - 1, 0);
      me.setVelocity(me.velocity().x(), -me.velocity().y() / 2, 0);
    
    }
    int rightColumn = constrain(column + 1, 0, graph.columns - 1);
    int leftColumn = constrain(column - 1, 0, graph.columns - 1);
    //roll code
    if(graph.blanket[rightColumn].position().y() < graph.blanket[column].position().y()){
      float yDelta = abs(graph.blanket[rightColumn].position().y() - graph.blanket[column].position().y());
      float xDelta = columnWidth;
      float gradient = yDelta / xDelta;
      me.addVelocity(constrain(-gradient,-1.5,1.5),0,0);
    }
    if(graph.blanket[leftColumn].position().y() < graph.blanket[column].position().y()){
      float yDelta = abs(graph.blanket[leftColumn].position().y() - graph.blanket[column].position().y());
      float xDelta = columnWidth;
      float gradient = yDelta / xDelta;
      me.addVelocity(constrain(gradient,-1.5,1.5),0,0);
    }
    if(column == 0){
      if(col == 0){
        score++;
      } 
      else {
        score--;
      }
    col = int(random(2));
    me = physics.makeParticle(1.0, width / 2, 0, 0);
    sound.stop();
    sound.play();
      println(score);
    }
    if(column == graph.columns - 1){
      if(col == 1){
        score++;
      } 
      else {
        score--;
      }
    col = int(random(2));
    me = physics.makeParticle(1.0, width / 2, 0, 0);
    sound.stop();
    sound.play();
      println(score);
    }
  }
}

void initColors(){
  colorTable = new color[2];
  colorTable[0] = color(255, 0, 0);
  colorTable[1] = color(0, 0, 255);
}