Preface
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Chapter 4, Asteroid Belt Assault – Lost in Space begins developing our second game. This
me we put together a space-based shooter. We will create a basic moving star eld using
a simple parcle system, and introduce frame-based sprite animaon. We will add moving
asteroids to our star eld and examine how to detect collisions between asteroids and make
them respond realiscally. We add a player-controlled spaceship, and enemies that can y
across the screen following pre-dened waypoints.
Chapter 5, Asteroid Belt Assault – Special Eects wraps up Asteroid Belt Assault. We
implement collision detecon between the player, enemies, asteroids, and bullets and create
parcle-based explosions. Finally, we will look at loading and playing sound eects to bring
life to our in-game events.
Chapter 6, Robot Rampage – Mul-Axis Mayhem begins the construcon of a tank-based
game in which the player can move and re independently using either an Xbox 360
controller or the keyboard. We build a le-map based game world and a camera class to view
a screen-sized area of the larger world, and implement player collision with the walls of the
le map.
Chapter 7, Robot Rampage – Lots and Lots of Bullets completes Robot Rampage by
expanding on our parcle-based explosion system, and adding enemies, player goals, and
weapon upgrades to our le map. We allow the player to re at the enemies with several
dierent weapons. Finally, we create an implementaon of the A* path-nding algorithm to
allow the enemy tanks to track down the player.
Chapter 8, Gemstone Hunter – Put on your Plaorm Shoes introduces a side-scrolling,
jump-and-run plaorm game. We start by evolving our le-based mapping system to allow
mulple layers of les, and look at combining XNA and Windows Forms to produce a map
editor for Gemstone Hunter. As part of this process, we will look at building more complex
soluons that contain mulple projects, and separate our game's le engine into a Game
Library project.
Chapter 9, Gemstone Hunter – Standing on Your Own Two Pixels concludes the Gemstone
Hunter project by examining an alternave method for frame-based sprite animaon using
player and enemy graphics from the XNA Plaorm Starter Kit. We implement plaorm
physics and bring the game together by loading levels and reacng to their embedded
code values.
What you need for this book
In order to install and use the Microso XNA 4.0 tools, you will need a Windows PC with
either Microso Windows Vista or Microso Windows 7, and a video card supporng DirectX
9 or later. Shader Model 1.1 is required for XNA, but it is highly recommended that your
video card support Shader Model 2.0 or later, as many of the XNA samples available online
require 2.0 support.
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