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XNA 4 3D Game Development by Example: Beginner's Guide

You're reading from   XNA 4 3D Game Development by Example: Beginner's Guide Create action-packed 3D games with the Microsoft XNA Framework with this book and ebook.

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Product type Paperback
Published in Sep 2012
Publisher Packt
ISBN-13 9781849687089
Length 322 pages
Edition 1st Edition
Languages
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Author (1):
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Kurt Jaegers Kurt Jaegers
Author Profile Icon Kurt Jaegers
Kurt Jaegers
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Table of Contents (16) Chapters Close

XNA 4 3D Game Development by Example Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
1. Introduction to XNA FREE CHAPTER 2. Cube Chaser – A Flat 3D World 3. Cube Chaser – It's A-Mazing! 4. Cube Chaser – Finding Your Way 5. Tank Battles – A War-torn Land 6. Tank Battles – The Big Guns 7. Tank Battles – Shooting Things 8. Tank Battles – Ending the War 9. Mars Runner 10. Mars Runner – Reaching the Finish Line

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...

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