funciones

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float posX, posY, velX, velY;

int sz = 20;

int totalRebots = 0;

​

void setup() {

  size(300, 200);

​

  posX = width/2;

  posY = height/2;

  velX = random(8, 15);

  velY = random(8, 15);

}

​

void draw() {

  fill (0, 25);

  rect (0, 0, width, height);

​

  actualizaPosiciones();

  cuentaRebotes();

  dibuijaBola();

}

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void actualizaPosiciones() {

  //actualitzem posicions

  posX = posX+velX;

  posY = posY+velY;

}

​

void  dibuijaBola() {

  //dibuix

  noStroke();

  fill(random(255), random(255), random(255));

  ellipse(posX, posY, totalRebots, totalRebots);

}

​

void cuentaRebotes() {

  //comprobem posX

  if ((posX<0)||(posX>width)) {

    velX = -velX;

    totalRebots ++;

  } 

  //comprobem posY

  if ((posY<0)||(posY>height)) {

    velY = -velY;

    totalRebots ++;

  } 

  fill(127);

  //i finalment, escribim

  text (totalRebots, 15, height-15);

}

​

void mousePressed () {

  velX = 2;

  velY = 2;

}

​

void mouseReleased () {

  velX = random(8, 15);

  velY = random(8, 15);

}

​

​

​