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

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.

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

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

Credits

About the Author

About the Author

About the Reviewers

About the Reviewers

www.PacktPub.com

www.PacktPub.com

Preface

Free Chapter

Introduction to XNA

Introduction to XNA

System requirements

Installing the Windows Phone SDK

Time for action – installing Windows Phone SDK

Speller – Our first XNA game

Time for action – creating an XNA project

Managing content

Time for action – creating content assets

Member variables

Time for action – declaring new member variables

The Game1 constructor

Time for action – customizing the Initialize() method

Loading content

Time for action – creating a square texture

Time for action – customizing the Update() method

The Draw() method

Time for action – drawing Speller

Time for action – words and letters

Time for action – completing the Speller project

Cube Chaser – A Flat 3D World

Cube Chaser – A Flat 3D World

Designing the game

Creating the project

Time for action – creating the Cube Chaser project

Our view of the world

Time for action – beginning the Camera class

The Projection matrix

Looking at something

Time for action – implementing a look-at point

The View matrix

Time for action – the View matrix

From the ground up

Time for action – creating the Maze classes

Drawing the floor

Time for action – drawing the floor

Time for action – expanding the Camera

Time for action – letting the player move

Cube Chaser – It's A-Mazing!

Cube Chaser – It's A-Mazing!

Maze generation

Time for action – defining a MazeCell

Time for action – generating the Maze class

Constructing the walls

Time for action – building walls

Time for action – drawing the walls

Time for action – bouncing off the walls

Cube Chaser – Finding Your Way

Cube Chaser – Finding Your Way

Time for action – placing the cube

Time for action – rotating the cube

Matrices – big scary math things?

Positioning the cube

Time for action – randomly positioning the cube

Catching the cube

Time for action – catching the cube

Tank Battles – A War-torn Land

Tank Battles – A War-torn Land

Creating the project

Time for action – creating the Tank Battles project

An arc-ball camera

Time for action – the ArcBallCamera class – part 1

Time for action – finishing the ArcBallCamera class

Building the playfield

Time for action – generating the terrain

Time for action – adding the ReadHeightMap() method

Time for action – adding the BuildVertexBuffer() method

Time for action – the buildIndexBuffer() method

Let's see the terrain already!

Time for action – drawing the terrain

Adding texture – a gentle introduction to HLSL

Time for action – HLSL declarations

Time for action – Vertex Shader Input and Output definition

Time for action – the vertex shader

Time for action – the pixel shader

Time for action – utilizing Terrain.fx

Moving the camera

Time for action – moving the camera with the mouse

Tank Battles – The Big Guns

Tank Battles – The Big Guns

Adding the tank model

Time for action – adding the tank model

Time for action – building the Tank class

Time for action – terrain heights

Time for action – tank animation

Time for action – positioning tanks

Tank Battles – Shooting Things

Tank Battles – Shooting Things

Interface components

Time for action – creating the UIWidget class

Time for action – creating UITextblocks

Time for action – creating buttons

Time for action – adding the UIHelper class

Time for action – creating the UI

Time for action – responding to events

Time for action – ShotManager-part 1

Time for action – the Particle class-part 1

Time for action – finishing the Particle class

Time for action – the ParticleManager class

Time for action – building Particles.fx

Time for action – implementing particles

Tank Battles – Ending the War

Tank Battles – Ending the War

Managing game states

Time for action – implementing a title screen

Time for action – detecting hits

Time for action – managing turns

Visual improvements

Time for action – computing normals

Time for action – HLSL for lighting

Time for action – using ambient light

Time for action – multitexturing

Mars Runner

Design of Mars Runner

Getting started with the GSM sample

Time for action – creating the Mars Runner solution

Time for action – customizing the BackgroundScreen class

Time for action – updating the menu

Time for action – creating the MarsRunnerPlayScreen class

Time for action – the stationary camera

Creating the background

Time for action – creating a skybox

Building the Martian surface

Time for action – beginning the MarsTrack class

Time for action – generating the track

Time for action – drawing the track

Mars Runner – Reaching the Finish Line

Mars Runner – Reaching the Finish Line

Abstracting support for 3D models

Time for action – the GameEntity class

Building the rover

Time for action –building the rover

Time for action – accepting user input

Animating the planet

Time for action – moving the world

Animating the rover

Time for action – animating the rover

Crashing into craters

Time for action – detecting craters

Adding an enemy

Time for action – the basic flying saucer

Time for action – flying the saucer

Shots and collisions

Time for action – Shot classes

Time for action – the ShotManager class

Time for action – enemy shots

Time for action – player shots versus aliens

Time for action – enemy shots versus the rover

Time for action – scoring

Time for action – the GameOver screen

Time for action – building the SFXManager class

Time for action – playing sound effects

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Time for action – accepting user input

To add support for handling user input to the MarsRunnerPlayScreen class, perform the following steps:

1. In the Fields region of the MarsRunnerPlayScreen class, add two new fields to track the player's desired movement direction and the base movement speed as follows:
```
int moveState = 0;
int moveSpeed = 8;
```

2. Add the HandleInput() override method to the MarsRunnerPlayScreen class as follows:

#region Handle Input
public override void HandleInput(InputState input)
{
    moveState = 0;
    if (
        (input.CurrentKeyboardStates[0].IsKeyDown(Keys.Left)) ||
        (input.CurrentGamePadStates[0].ThumbSticks.Left.X < -0.3f)
        )
    {
        moveState = 1;
    }

    if (
        (input.CurrentKeyboardStates[0].IsKeyDown(Keys.Right)) ||
        (input.CurrentGamePadStates[0].ThumbSticks.Left.X > 0.3f)
        )
    {
        moveState = 2;
    }

    if (
        (input.CurrentKeyboardStates[0].IsKeyDown(Keys.Up)) ||
        (input.CurrentGamePadStates...