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Lua Game Development Cookbook

You're reading from   Lua Game Development Cookbook Over 70 recipes that will help you master the elements and best practices required to build a modern game engine using Lua

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Product type Paperback
Published in Jul 2015
Publisher
ISBN-13 9781849515504
Length 360 pages
Edition 1st Edition
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Author (1):
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Mário Kašuba Mário Kašuba
Author Profile Icon Mário Kašuba
Mário Kašuba
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Toc

Table of Contents (11) Chapters Close

Preface 1. Basics of the Game Engine 2. Events FREE CHAPTER 3. Graphics – Common Methods 4. Graphics – Legacy Method with OpenGL 1.x–2.1 5. Graphics – Modern Method with OpenGL 3.0+ 6. The User Interface 7. Physics and Game Mechanics 8. Artificial Intelligence 9. Sounds and Networking Index

Using OpenGL extensions with GLEW and Lua


The GLEW library handles the correct mapping of the OpenGL function's entry points. This way you won't have issues with calling nonexistent extension functions if that extension is not available on the current system.

Getting ready

Support for the GLEW library is included in the OpenGL wrapper module called GL. First, you need to include this library in the Lua environment with the following code:

local gl = require 'luagl'

The GLEW library is initialized with the call of the gl.InitGLEW function.

How to do it…

With the GLEW library initialized, you are able to query for the presence of the specified extension or the OpenGL version. To do this, you'll need to call the gl.IsSupported function. The only parameter of this function is an extension name or the GL_VERSION_{version} string. This function also accepts more than one string parameter delimited with space. It will return true if such a combination is supported on the current system, otherwise it...

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