Car racing_ OOP

// Example: Two Car objects, modified from Daniel Shiffman sample code

Car myCar1;

Car myCar2; // Two objects!

​

void setup() {

  size(400,200);

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

  myCar1 = new Car(color(255,100,100),0,120,2); 

  myCar2 = new Car(color(100,190,255),0,70,1);

}

​

void draw() {

  background(255);

  drawRoad();

  myCar1.drive();

  myCar1.display();

  myCar2.drive();

  myCar2.display();

}

​

void drawRoad() {

 noStroke();

  fill(130,255,180); 

 rect(0,0,width,height);

 fill(140,160,160);

 rect(0,50,width,100);

 fill(255);

 rect(0,98,30,4);

 rect(50,98,30,4);

 rect(100,98,30,4);

 rect(150,98,30,4);

 rect(200,98,30,4);

 rect(250,98,30,4);

 rect(300,98,30,4);

 rect(350,98,30,4);

}

​

// 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 xspeed;

​

  // The Constructor is defined with arguments.

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

    c = tempC;

    xpos = tempXpos;

    ypos = tempYpos;

    xspeed = tempXspeed;

  }

​

  void display() {

    stroke(0);

    fill(c);

    rect(xpos,ypos,20,10);

    rect(xpos+3,ypos,12,10);

  }

​

  void drive() {

    xpos = xpos + xspeed;

    if (xpos > width) {

      xpos = 0;

    }

  }

}