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  • Book Overview & Buying Lua Game Development Cookbook
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Lua Game Development Cookbook

Lua Game Development Cookbook

By : Mário Kašuba
4.3 (6)
Buy this Book
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Lua Game Development Cookbook

Lua Game Development Cookbook

4.3 (6)
By: Mário Kašuba
Buy this Book

Overview of this book

This book is for all programmers and game enthusiasts who want to stop dreaming about creating a game, and actually create one from scratch. The reader should know the basics of programming and using the Lua language. Knowledge of the C/C++ programming language is not necessary, but it's strongly recommended in order to write custom Lua modules extending game engine capabilities or to rewrite parts of the Lua code into a more efficient form. Algebra and matrix operations are required in order to understand advanced topics in Chapter 4, Graphics – Legacy Method with OpenGL 1.x-2.1 and Chapter 5, Graphics – Modern Method with OpenGL 3.0+. Sample demonstrations are coupled with binary libraries for Windows and Linux operating systems for convenience.
Table of Contents (11 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Sections
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Conventions
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Reader feedback
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Customer support
Lock Free Chapter
1
1. Basics of the Game Engine
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1. Basics of the Game Engine
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Introduction
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Preparing a basic file structure for the game engine
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Making a stack
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Making a queue
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Making a prioritized queue
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Extending ipairs for use in sparse arrays
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Creating Lua modules
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Handling errors with pcall, xpcall, and assert
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Using Lua with existing projects written in C/C++
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Getting LuaSDL for libSDL 1.2
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Designing the main application loop with LuaSDL
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2. Events
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2. Events
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Introduction
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Processing input events with LuaSDL
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Using the keyboard input
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Using the relative mouse position
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Using the absolute mouse position
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Using timers
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3. Graphics – Common Methods
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3. Graphics – Common Methods
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Introduction
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Creating a window in libSDL
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Creating surfaces
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Surfaces manipulation
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Using colors
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Cursor manipulation
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Initializing the graphics mode with OpenGL
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Getting OpenGL information
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Using OpenGL extensions with GLEW and Lua
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Loading images with SDL_image
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Creating textures
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Loading and using bitmap fonts
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Loading and using TrueType fonts
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Displaying the text
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Creating texture atlas with the rover-design pattern
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Using tiles and tilesets in the game
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4. Graphics – Legacy Method with OpenGL 1.x–2.1
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4. Graphics – Legacy Method with OpenGL 1.x–2.1
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Introduction
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Drawing primitives in immediate mode
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Setting up blending
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Moving, rotating, and scaling objects
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Setting up the orthogonal and perspective cameras
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Setting up materials
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Setting up lighting
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Using display lists
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Setting up the vertex buffer
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5. Graphics – Modern Method with OpenGL 3.0+
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5. Graphics – Modern Method with OpenGL 3.0+
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Introduction
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Loading and using GLSL shaders
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Using uniform variables with shaders
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Writing a vertex shader
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Writing a fragment (pixel) shader
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Drawing primitives using vertex buffers
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Rendering to texture
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Applying highlights and shadows to the scene
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Bumpmapping
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6. The User Interface
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6. The User Interface
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Introduction
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Drawing a simple window
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Moving the window
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Using the window hierarchy
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Showing the part of the window with the stencil test and window content scrolling
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Window controls and interaction
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7. Physics and Game Mechanics
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7. Physics and Game Mechanics
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Introduction
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Using Box2D with Lua
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Using vector math
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Choosing the correct vector scaling for the physics engine
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Creating static and dynamic objects
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Setting up object properties
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Moving objects
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Setting up bullets
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Running the physics simulation
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Detecting object collision
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Setting up object collision filtering
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Setting up object joints
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8. Artificial Intelligence
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8. Artificial Intelligence
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Introduction
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A simple pathfinding algorithm for a maze
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Pathfinding for tile-based environments with obstacles
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Using a fuzzy logic for decision making
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9. Sounds and Networking
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9. Sounds and Networking
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Introduction
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Initializing the audio subsystem
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Playing sound samples
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Playing background music
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Network communication with ZeroMQ
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Creating a basic client-server architecture
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Sending messages to many hosts at once
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Communication between threads
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Index
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Index

Getting LuaSDL for libSDL 1.2

LuaSDL is a binding to the famous libSDL 1.2 multimedia library. LuaSDL provides an interface not only to libSDL itself but also to the SDL_image, SDL_mixer, SDL_net, SDL_ttf, and SDL_gfx libraries.

Getting ready

The LuaSDL module depends on many external libraries. To make the module preparation easier, there's a LuaSDL project repository at GitHub with support for the CMake building system. This project repository contains all the necessary external libraries, which make module building process a breeze.

You'll need to have the following software installed to successfully build the LuaSDL module:

  • The git version control system is available at https://git-scm.com/
  • The CMake building system version 3.1 or newer is available at http://www.cmake.org/
  • The C/C++ compiler, Microsoft Visual Studio, GCC, and clang are supported
  • The Netwide Assembler—NASM (optional) used only for CPU-specific optimizations is available at http://www.nasm.us/

How to do it…

The building process of LuaSDL is the same on both Windows and Linux operating systems with minor differences:

  1. Download the LuaSDL source code with the git command:
    git clone --recursive https://github.com/soulik/LuaSDL.git
  2. You need to create an empty working directory, which will contain the project and binary files:
    mkdir LuaSDL/build
cd LuaSDL/build
  3. Now, you can run the CMake building tool to prepare the project files or to make further changes to the building configuration:
    cmake ..
  4. After successful preparation of the building environment, you can either open the project file in your IDE or simply run the make command to start the compilation depending on the compiler of your choice:
    • For Microsoft Visual Studio—use the luasdl.sln file
    • For Linux users—use the make command
  5. The successful compilation will result in binary files stored in the bin and lib directories.

Note that Microsoft Visual Studio will generate the .dll binary files in the bin directory, whereas, Linux users will find the same binary files in the lib directory. You can copy all the binary files into one directory where your Lua application resides. This will ensure that the Lua interpreter finds all the necessary binary modules.

There's more…

LuaSDL uses libSDL 1.2, which is more than 5 years old. Despite being no longer maintained, the LuaSDL package is considered as stable.

LuaSDL2 is being developed at the time of writing. You can access the source code from GitHub at https://github.com/soulik/LuaSDL-2.0.git.

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