public class Lab5
{
  public static void main(String[] args)
  {
    // requires images angry.png and green-pig.png in the Lab5 folder
    // (see website for links)

    int x;
    int y;
    int xVelocity;
    int yVelocity;
    int oldx;
    int oldy;
    int targetx;
    int targety;
    boolean winner;

    Draw.window(600,600);
    
    targetx = 375;
    targety = Util.random(0,500);
    Draw.image(targetx,targety,100,100,"green-pig.png");
    winner = false;       // haven't won yet
    
    x = 0;                // starting position of angry bird
    y = 500;
    Draw.image(x,y,100,100,"angry.png");
    Util.pause(0.01);
    Draw.setColor(255,255,255); 
    Draw.setFill(true);
    
    System.out.println("Please input the x velocity:");
    xVelocity = Integer.parseInt(Util.input());
    System.out.println("Please input the y velocity:");
    yVelocity = Integer.parseInt(Util.input());
        
    while (!winner && x <= 600 && y <= 500)
    {
      oldx = x;
      oldy = y;
      x = x + xVelocity;
      y = y - yVelocity;
      yVelocity = yVelocity - 1;
      if (x <= 600 && y <= 500)
      {
        // As long as the new x value isn't completely
        // off the screen to the right and as long as
        // the new y value doesn't make the bird go
        // through the "ground"
        Draw.oval(oldx-8,oldy-8,100+16,100+16);
        Draw.image(targetx,targety,100,100,"green-pig.png");
        Draw.image(x,y,100,100,"angry.png");
        Util.pause(0.01);
        if (x >= targetx - 50 && y >= targety - 50
              && x <= targetx + 50 && y <= targety + 50)
        {
          // If the bird hits at least half of the target
          // then set winner to true which will cause the
          // loop to stop on the next loop check.
          winner = true;
        }
      }
    }
    
    Draw.setFont(144);
    Draw.setColor(0,0,255);
    if (winner) 
    {
      Draw.text(300,300,"5000");
    }
    
  }
}