Objetos: ejemplo coche vertical

Car myCar1;

Car myCar2; // Two objects!

void setup() {

  size(800,600);

  // Parameters go inside the parentheses when the object is constructed.

  myCar1 = new Car(color(255,0,0),500,400,-5);

  myCar2 = new Car(color(0,0,255),300,300,5);

}

void draw() {

  background(255);

  myCar1.drive();

  myCar1.display();

  text(myCar1.ypos,400,200);

  myCar2.drive();

  myCar2.display();

}

// Even though there are multiple objects, we still only need one class.

// No matter how many cookies we make, only one cookie cutter is needed.

class Car {

  color c;

  float xpos;

  float ypos;

  float yspeed;

  // The Constructor is defined with arguments.

  Car(color tempC, float tempXpos, float tempYpos, float tempYspeed) {

    c = tempC;

    xpos = tempXpos;

    ypos = tempYpos;

    yspeed = tempYspeed;

  }

  void display() {

    stroke(0);

    fill(c);

    rectMode(CENTER);

    rect(xpos,ypos,20,10);

  }

  void drive() {

    ypos = ypos + yspeed;

    if (ypos > height && yspeed>0) {

      ypos = 0;

    }

    ypos = ypos + yspeed;

    if (ypos < 0 && yspeed<0) {

      ypos = 600;

    }

  }

}