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Home > Programming > Programming Language > L÷VE for Lua Game Programming
L÷VE for Lua Game Programming
L÷VE for Lua Game Programming

L÷VE for Lua Game Programming: If you want to create 2D games for Windows, Linux, and OS X, this guide to the L?ñVE framework is a must. Written for hobbyists and professionals, it will help you leverage Lua for fast and easy game development.

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L÷VE for Lua Game Programming

Chapter 1. Getting Started with LÖVE

LÖVE is a fantastic framework that leverages the Lua scripting language for developing 2D games; it is open source, free to use, and licensed under zlib/libpng. You can learn more about Lua programming at www.lua.org.

In this chapter we'll go through the following:

  • All we need to get started with LÖVE

  • How to install LÖVE

  • How to run a LÖVE game

  • Choosing the editors

And a step further to understand the basic structure that makes a LÖVE game.

Downloading LÖVE

Before we build our game, we need a copy of LÖVE's engine running on our computer; a copy of the framework installed will help the computer to interpret the code we will be writing.

Direct your web browser to www.love2d.org, scroll to the download section of the site and choose the installer that is compatible with your computer.

It is advisable that we download an installer instead of the source codes, except for when we want to be geeky and build it ourselves.

For Windows users

When you are through with downloading the installer, run the setup and follow the instructions.

When your installation is complete, run the program; you should see a the window displaying a beautiful animation on the screen.

For Linux users

Linux users are required to download the .deb install file by clicking on build number of their operating system; users running Precise Pangolin Ubuntu OS should click on the 12.04 link. Run the install program and follow the instructions. If the LÖVE framework is fully installed, you can double-click on a .love file to run it.

For Mac users

Mac users should visit the LÖVE wiki (https://www.love2d.org/wiki/Getting_Started) page for instructions on how to install LÖVE and run a packaged game.

Choosing your editor

In choosing a suitable editor, you can use any text editor that supports the Lua programming language; we recommend Notepad++; it is free and has a clean and non-confusing GUI.

Running a LÖVE game

First of all, we assume we do not have any LÖVE game yet. OK, then let's just write a simple "Hello World!" program and run it with LÖVE. Open up a text editor and write the following Lua code:

--create a display

function love.draw()
--display a text on a 800 by 600 screen in the positions x= 400, and --y=300
   love.graphics.print('hello world!', 400, 300)

end

Now save this code as main.lua. Open a folder for your game project, put your main.lua file inside the folder, and compress the content of the folder. Change the .zip extension to .love. You'll notice a change in the icon of the compressed file; it changes to a LÖVE logo. Now that we've done all that, we can run our game. If you follow the instructions correctly, you should see a screen similar to the following screenshot:

If you do not compress the file properly, you will get the following blue screen displaying error information:

Note that it is the content of your game folder that should be compressed and not the folder itself, and make sure the main.lua file is at the top level.

Basic structure of LÖVE

There are three basic functions that make up a LÖVE game that are essential in most of the games you will be designing with LÖVE. For now, the following are the basics to make a small game:

  • love.load(): This preloads all the necessary assets we need to make our game.

  • love.update(dt): This is where we do most of our maths, where we deal with events; it is called before a frame is drawn. dt is the time it takes to draw a frame (in seconds).

  • love.draw(): This draws all that we want to display on the screen.

Examples

The basic structure of the game is done as you can see in the following code:

--load our assets
function love.load()
   --load all assets here
end




--update event
function love.update(dt)
--do the maths
end


--draw display
function love.draw()
--describe how you want/what to draw.
end

That's just it, well... maybe! So let's play with these chunks one more time.

Now let's edit main.lua to enable loading sample assets that we want to use within the game:

function love.load()

   local myfont = love.graphics.newFont(45)

   love.graphics.setFont(myfont)

   love.graphics.setColor(0,0,0,225)

   love.graphics.setBackgroundColor(255,153,0)
end


function love.update()



end

function love.draw()

   love.graphics.print('Hello World!', 200, 200)

end

Conf.lua

Before you go on and start coding your game, you need to give your video game some specs such as window width, window height, and window title. So set up a new file named conf.lua; inside it you can then create your game specs as shown in the following code snippet:

function love.conf(w)

w.screen.width = 1024 

w.screen.height = 768

w.screen.title = "Goofy's Adventure"

end

You can manipulate the figures and titles any way and also change that w to whatever variable you want.

The preceding code does the following:

  • Loads our font

  • Sets the font color

  • Sets the background color

  • Draws text on the screen

  • Configures the screen size

Basically we are using the love.graphics module; it can be used to draw (in the real sense) texts, images, and any drawable object in the scene. In the previous code snippets, we defined our fonts with the love.graphics.newFont(45) that formats our text by declaring the size of the font as 45. setFont() loads the font we defined as myfont, setColor() colors the text in the RGB format, and setBackgroundColor() sets the background.

Then we printed text using the love.graphics.print('text', x, y) function in the draw function with three parameters parsed in it: the text and the x and y coordinates. We are not going to do anything in the love.update() function yet, because we are not dealing with scene events.

So let's load our game as a .love file and see what it displays:

Summary

Now we can grab a mug of cappuccino with Ray-Bans on and smile; we have installed the LÖVE game engine, text editor, and Visual tile-level editor (Tiled). We have also got a quick look at the basic structure for writing our game in Lua and displayed "Hello World!" in a colored background window. Next we'll go through how to draw 2D objects, move objects, and animate character sprites.

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Page 1 of 6

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Key benefits

  • Discover the L?ñVE framework and build games easily and efficiently
  • Learn how to utilize the L?ñVE framework's tools to create a 2D game world
  • A step-by-step approach to learning game development

Description

L?ñVE is a game development framework for making 2D games using the Lua programming language. L?ñVE is totally free, and can be used in anything from friendly open-source hobby projects, to closed-source commercial ones. Using the Lua programming framework, one can use L?ñVE2D to make any sort of interesting games. L?ñVE for Lua Game Programming will quickly and efficiently guide you through how to develop a video game from idea to prototype. Even if you are new to game programming, with this book, you will soon be able to create as many game titles as you wish without stress. The L?ñVE framework is the quickest and easiest way to build fully-functional 2D video games. It leverages the Lua programming language, which is known to be one of the easiest game development languages to learn and use. With this book, you will master how to develop multi-platform games for Windows, Linux, and Mac OS X. After downloading and installing L?ñVE, you will learn by example how to draw 2D objects, animate characters using sprites, and how to create game physics and game world maps. L?ñVE for Lua Game Programming makes it easier and quicker for you to learn everything you need to know about game programming. If you're interested in game programming, then this book is exactly what you've been looking for.

Who is this book for?

L?ñVE for Lua Game Programming is for anyone who is interested in learning about desktop game development.

What you will learn

  • Create different environments to make your games more interesting
  • Add sound and music to your games
  • Apply game physics and real-time particle collisions
  • Animate game characters using sprites
  • Deploy your games to Windows, Linux, and Mac platforms

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Publication date : Sep 25, 2013
Length: 106 pages
Edition : 1st
Language : English
ISBN-13 : 9781782161615
Category :
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Languages :
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Concepts :
Programming Language

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ISBN-13 : 9781782161615
Category :
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Languages :
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Concepts :
Programming Language

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L÷VE for Lua Game Programming
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Table of Contents

8 Chapters
Getting Started with LÖVE Chevron down icon Chevron up icon
Getting Started with LÖVE
Downloading LÖVE
For Windows users
For Linux users
For Mac users
Summary
LÖving Up! Chevron down icon Chevron up icon
LÖving Up!
Drawing 2D objects
Moving objects
Sprites
Animation
Summary
Before You Build a Game Chevron down icon Chevron up icon
Before You Build a Game
Planning your game
Summary
Making Your First Game Chevron down icon Chevron up icon
Making Your First Game
Basic level design
Getting started with Tiled
Exporting your tile map
Loading the game level
Conf.lua
Summary
More About Making the Game Chevron down icon Chevron up icon
More About Making the Game
Bump on it!
Loading solid tiles into the bump
Loading the character objects (player and enemy)
A player character
The anim8 library
Summary
Meeting the Bad Guy! Chevron down icon Chevron up icon
Meeting the Bad Guy!
Bad guy
Updating the enemy position and animation
Enemy collision configuration
Enemy death function
Drawing the enemy character to the screen
Summary
Pickups and Head-Up Display and Sounds Chevron down icon Chevron up icon
Pickups and Head-Up Display and Sounds
Pickups
Audio system
Head-Up Display (HUD)
Life HUD
Score HUD
Summary
Packaging and Distributing Your Game Chevron down icon Chevron up icon
Packaging and Distributing Your Game
Windows executable
Mac apps
Linux
LÖVE on browsers
LÖVE on Android mobile phones
Summary

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Full star icon Full star icon Half star icon Empty star icon Empty star icon 2.7
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PAUL Lionel Mar 15, 2020
Full star icon Full star icon Full star icon Full star icon Full star icon 5
This book motivate the reader to explore the game development with a ease step by step point of view. I recommend this book for those who to learn 2d game development
Amazon Verified review Amazon
Mr Steve M Jarman Nov 21, 2013
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
LÖVE is a really fun technology that let's aspiring game developers make a quick start on getting their core skills up to scratch. This book turned out to be a surprisingly good introduction to both LÖVE and Lua, though I'd definitely recommend studying some additional Lua specific material.The author takes us through the process of building a really neat little platform game. It's fun, looks great (as far as textbook "sample projects" go), and contains all of the essential elements that should help a reader to move from this book directly into a project of their own.There's also some good (albiet short) sections on general game design principles. Nice to see this sort of "theory" information included.If you're new to game design and want to dive straight in at a level that's not going to have you tearing your hair out, then LÖVE could be just the right technology for you. This book is short, but in a way, that's exactly what you need - it will get you straight into the action and take you just far enough to show you what you're capable of.Overall - a really good read.
Amazon Verified review Amazon
KK Hoey Jan 22, 2014
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
This is a great beginner/advanced book if you want to start programming games using Lua. The book is great at taking you step by step and explaining the process. I think Lua is one of the best languages for beginners because of its great syntax. This book is great if you are an experienced programmer or have done no code before.
Amazon Verified review Amazon
ts71rarrarrar Dec 30, 2013
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
This is a great book for learning how to program in Lua and making a game at the same time. It won't take long at all to actually have something moving around your screen that resembles a working game. I thought it was well thought out and really easy to follow, ie. you don't have to be a rocket scientist to program! Starts off with the basics but doesn't dwell on things that won't help you make a cool game. I liked it.
Amazon Verified review Amazon
CPallini Dec 01, 2013
Full star icon Full star icon Full star icon Empty star icon Empty star icon 3
The title is unfortunate: do not to expect to master LÖVE or Lua reading it.However you will able to follow the development of a complete platform game (another title flawn: strategy games are not covered at all) using Lua and the LÖVE framework.If you need a quick kick start on LÖVE framework and can tolerate some minor pitfalls then consider buying it.
Amazon Verified review Amazon

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