// Bryan Blackford - bblackfo@ucsc.edu

// Train is a container class for traincars
class Train {
int x=0;
int y=0;
int cars=0; // number of cars in train
int carlength=30; // length of each car

Traincar[] carArr; // car array

// initialize train
Train(int X,int Y,int Cars) {
  x=X;
  y=Y;
  cars=Cars;
  // create cars
  carArr = new Traincar[cars];
  for (int c = 0;c < cars;++c)
  {
    carArr[c] = new Traincar(x+(carlength*c)+1,y,carlength); 
  }
}

void update() 
{  // update each car
  for (int c = 0;c < cars;++c)
  {
    carArr[c].update();
  }
  // check if train has moved off screen
  if (cars > 0) {
    //print(cars); // debug
   if (carArr[cars-1].xpos < -carlength) // last car has moved off screen
    cars = 0;  // frees train for reuse
  }
}


}