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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
Languages
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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

Surfaces manipulation

The basic surface manipulation usually consists of filling the part or whole surface with color, which can be in fact clearing the surface, and copying the surface content into another surface. As you already know, the surface can also represent the screen content. With these two groups of operations you can do almost anything.

Getting ready

In this recipe, you'll be working with routines that require a definition of a rectangular area over which the operation will occur. The libSDL library uses its own SDL_Rect object to define such a rectangular area. You can create this object either with SDL.SDL_Rect_new or SDL.SDL_Rect_local. The second one is preferred because it contains an automatic garbage collection routine, so you don't have to explicitly call the SDL.SDL_Rect_delete function to delete the object. The only downside of this is that you can't set the position nor the size of rectangle in the constructor. This means that you have to set all the...

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