Book Image

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

By : Kurt Jaegers
Book Image

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

By: Kurt Jaegers

Overview of this book

Move beyond the world of flat 2D-based game development and discover how to create your own exciting 3D games with Microsoft XNA 4.0. Create a 3D maze, fire shells at enemy tanks, and drive a rover on the surface of Mars while being attacked by alien saucers."XNA 4 3D Game Development by Example: Beginner's Guide" takes you step-by-step through the creation of three different 3D video games with Microsoft XNA 4.0. Learn by doing as you explore the worlds of 3D graphics and game design.This book takes a step-by-step approach to building 3D games with Microsoft XNA, describing each section of code in depth and explaining the topics and concepts covered in detail. From the basics of a 3D camera system to an introduction to writing DirectX shader code, the games in this book cover a wide variety of both 3D graphics and game design topics. Generate random mazes, load and animate 3D models, create particle-based explosions, and combine 2D and 3D techniques to build a user interface."XNA 4 3D Game Development by Example: Beginner's Guide" will give you the knowledge to bring your own 3D game creations to life.
Table of Contents (16 chapters)
XNA 4 3D Game Development by Example Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface

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...