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 – letting the player move


  1. 1. Add the following fields to the declarations area of the CubeChaserGame class:

    float moveScale = 1.5f;
    float rotateScale = MathHelper.PiOver2;
  2. 2. Add the following to the Update() method of the CubeChaserGame class:

    float elapsed = (float)gameTime.ElapsedGameTime.TotalSeconds;
    KeyboardState keyState = Keyboard.GetState();
    float moveAmount = 0;
                
    if (keyState.IsKeyDown(Keys.Right))
    {
        camera.Rotation = MathHelper.WrapAngle(
            camera.Rotation - (rotateScale * elapsed));
    }
    
    if (keyState.IsKeyDown(Keys.Left))
    {
        camera.Rotation = MathHelper.WrapAngle(
            camera.Rotation + (rotateScale * elapsed));
    }
    
    if (keyState.IsKeyDown(Keys.Up))
    {
        //camera.MoveForward(moveScale * elapsed);
        moveAmount = moveScale * elapsed;
    }
    
    if (keyState.IsKeyDown(Keys.Down))
    {
        //camera.MoveForward(-moveScale * elapsed);
        moveAmount = -moveScale * elapsed;
    }
    
    if (moveAmount != 0)
    {
        Vector3 newLocation = camera.PreviewMove(moveAmount...