Time for action – detecting craters

To detect the craters on the track, perform the following steps:

1. 1. Add the GetTrackSegment() method to Helper Methods region of the MarsTrack class as follows:

   public int GetTrackSegment(float position)
   {
       return track[(int)(position / 30f)];
   }

2. 2. Add a new field to the Fields region of the MarsRunnerPlayScreen class to flag the game as having ended as follows:

   bool gameEnded = false;

3. 3. At the very beginning of the Update() method in the MarsRunnerPlayScreen class, add the following lines of code to return to the main menu if the game has ended:

   if (gameEnded && !otherScreenHasFocus)
   {
       ScreenManager.AddScreen(new BackgroundScreen(), null);
       ScreenManager.AddScreen(new MainMenuScreen(), null);
       ExitScreen();
   }

4. 4. Still in the Update() method, inside the if (IsActive) block, add the following lines of code just after the call to the rover.Update() method:

   if (CheckFallInPit())
   {
       EndGame();
   }

5. 5. Add the checkFallInPit() method to the MarsRunnerPlayScreen...