Book Image

OpenGL Game Development By Example

By : Stephen Madsen, Robert Madsen
Book Image

OpenGL Game Development By Example

By: Stephen Madsen, Robert Madsen

Overview of this book

OpenGL is one of the most popular rendering SDKs used to develop games. OpenGL has been used to create everything from 3D masterpieces running on desktop computers to 2D puzzles running on mobile devices. You will learn to apply both 2D and 3D technologies to bring your game idea to life. There is a lot more to making a game than just drawing pictures and that is where this book is unique! It provides a complete tutorial on designing and coding games from the setup of the development environment to final credits screen, through the creation of a 2D and 3D game. The book starts off by showing you how to set up a development environment using Visual Studio, and create a code framework for your game. It then walks you through creation of two games–a 2D platform game called Roboracer 2D and a 3D first-person space shooter game–using OpenGL to render both 2D and 3D graphics using a 2D coordinate system. You'll create sprite classes, render sprites and animation, and navigate and control the characters. You will also learn how to implement input, use audio, and code basic collision and physics systems. From setting up the development environment to creating the final credits screen, the book will take you through the complete journey of creating a game engine that you can extend to create your own games.
Table of Contents (19 chapters)
OpenGL Game Development By Example
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Texture mapping


Until now, all of our shapes and models used color, but a whole new world awaits us when we start applying textures to our models. Adding a 2D texture to a 3D model is known as texture mapping, or in some cases texture wrapping. Let's see what it takes to add a little texture to our 3D models. We are going to start with a simple cube.

First, use your favorite image editing software to create a 256 x 256 pixel square and give it some kind of texture. I will be using the following one:

Save this texture as a bitmap (BMP). We are going to use bitmaps, as opposed to PNGs, for texture mapping because the internal data structure of a bitmap happens to coincide with the data structure that is expected by OpenGL. In other words, it is easier!

I always create a folder called resources for my images. It is also a good idea to include these as resources in the Visual Studio project (right-click on the Resources folder in the Solution Explorer panel and choose Add Existing…, then navigate...