LibGDX Cross platform Development Cookbook电子书

Libgdx Cross-platform Game Development Cookbook

Table of Contents

Libgdx Cross-platform Game Development Cookbook

Credits

About the Authors

About the Reviewers

www.PacktPub.com

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Why Subscribe?

Free Access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Downloading the color images of this book

Errata

Piracy

Questions

1. Diving into Libgdx

Introduction

Setting up a cross-platform development environment

Getting ready

How to do it…

Java Development Kit

Windows and Mac users

GNU/Linux users

Eclipse

Android SDK

Mac users

GNU/Linux users

All users

Eclipse plugins

XCode

Fixing character encoding and line endings

Making sure everything is in order

How it works…

There's more…

See also

Creating a cross-platform project

Getting ready

How to do it…

How it works…

There's more…

See also

Understanding the project structure and application life cycle

Getting ready

How to do it…

Using logging to get to know the application life cycle

Starter classes and configuration

Desktop starter

Android starter

HTML starter

iOS starter

How it works…

There's more…

Living comfortably with ApplicationAdapter

Managing a multiscreen application with Game

See also

Updating and managing project dependencies

Getting ready

How to do it…

Gradle build file primer

Updating existing dependencies

Adding Libgdx extensions

Bullet

Core

Desktop

Android

iOS

FreeTypeFont

Core

Desktop

Android

iOS

Controllers

Core

Desktop

Android

HTML5

Box2D

Core

Desktop

Android

iOS

HTML5

Tools

Core

Desktop

AI

Core

Android

HTML

Adding external repositories

Adding additional file dependencies

Managing GWT dependencies

There's more…

See also

Using source control on a Libgdx project with Git

Getting ready

How to do it…

How it works…

Basic operations

Git branches

Gitignore files

There's more…

See also

Importing and running the Libgdx official demos

Getting ready

How to do it…

How it works…

There's more…

2. Working with 2D Graphics

Introduction

Texture rendering with SpriteBatch

Getting ready

How to do it…

How it works…

2D rendering using 3D techniques

Coordinate system and camera setup

Assets location in Libgdx

Draw order

Texture filters

There's more…

See also

More effective rendering with regions and atlases

Getting ready

How to do it…

Packing PNG files into an atlas

Rendering regions of an atlas

How it works…

Atlas file format

How SpriteBatch works

A note on texture size limitations

There's more…

See also

Taking advantage of Libgdx sprites

Getting ready

How to do it…

How it works…

There's more…

Using bounds for collision detection

See also

Rendering sprite-sheet-based animations

Getting ready

How to do it…

How it works…

There's more…

Using different play modes

Checking when an animation has finished

Handling a character with many animations

See also

Understanding orthographic cameras

Getting ready

How to do it…

How it works…

There's more…

Rendering UI on top of the game world

Split screen

See also

Using ShapeRenderer for debug graphics

Getting ready

How to do it…

Rendering lines

Rendering circles

Rendering rectangles

Rendering points

Rendering triangles

How it works…

There's more…

See also

Handling multiple screen sizes with viewports

Getting ready

How to do it…

How it works…

There's more…

Getting the most out of Viewport

Working with two cameras and viewports

Floating elements

Build your own Viewport implementation

See also

3. Advanced 2D Graphics

Introduction

Achieving juicy effects with particles

Getting ready

How to do it…

The basics of Particle Editor

Rendering particle effects with Libgdx

How it works…

There's more…

See also

Frame buffers and image composition

Getting ready

How to do it…

How it works…

There's more…

Welcome to the world of shaders

Getting ready

How to do it…

How it works…

Data types

Vertex attributes

Uniforms

OpenGL ES precision specifiers

There's more…

The sepia effect

Inverted colors

Passing parameters into shader programs

Getting ready

How to do it…

How it works…

There's more…

Detecting shader compiler errors

More efficient uniform settings

2D depth of field shader

Getting ready

How to do it…

There's more…

See also

Embedding a Libgdx window into a Java desktop application

Getting ready

How to do it…

How it works…

There's more…

See also

4. Detecting User Input

Introduction

Detecting user input via event polling

Getting ready

How to do it…

How it works…

There's more…

Checking input availability

Showing the on-screen keyboard

Detecting user input via event listening

Getting ready

How to do it…

Event polling versus event listening

How it works…

There's more…

Managing multiple listeners at once

Getting ready

How to do it…

How it works…

See also

Detecting more complex gestures

Getting ready

How to do it…

How it works…

There's more…

Gesture polling

Introducing the controllers API

Getting ready

How to do it…

Including the controllers extension

Enumerating controllers

Controller state polling

Controller event listening

How it works…

There's more…

Controller mappings

Handling disconnections

See also

Input mapping for cross-platform development

Getting ready

How to do it…

Input contexts

Input profiles

Event notifications with InputActionListener

Input mapping in action

How it works…

There's more…

5. Audio and File I/O

Introduction

Playing short sound effects

Getting ready

How to do it…

How it works…

There's more…

Handling sounds individually

Changing the volume

Creating looping sounds

Managing effect priorities

See also

Audio streaming for background music

Getting ready

How to do it…

How it works…

There's more…

Checking the playback state

Looping the background music

See also

Optimizing audio files to reduce download sizes

Getting ready

How to do it…

How it works…

There's more…

See also

Procedural audio generators

Getting ready

How to do it…

How it works…

There's more…

See also

Engine sounds with dynamic audio

Getting ready

How to do it…

How it works…

There's more…

Controlling direction through panning

Music transitions

See also

The 2D space sound system

Getting ready

How to do it…

How it works…

There's more…

See also

The first approach to file handling in Libgdx

Getting ready

How to do it…

Retrieving basic information from files

Traversing tree structures

Writing to and reading from files

Copying and deleting files and directories

How it works…

There's more…

Creating temporary files

Filtering directory listings

File streaming

See also

Using preferences to store game states and options

Getting ready

How to do it…

How it works…

There's more…

See also

The XML parsing primer

Getting ready

How to do it…

How it works…

There's more…

See also

JSON serialization and deserialization

Getting ready

How to do it…

Reading objects from JSON

Writing objects to JSON

Manual JSON parsing

How it works…

There's more…

The Serializable interface

The Serializer interface

See also

6. Font Rendering

Introduction

Generating and rendering bitmap fonts

Getting ready

How to do it…

Using Hiero to generate bitmap font files

Rendering bitmap font files with Libgdx

How it works…

There's more…

See also

Baking effects into fonts using Hiero

Getting ready

How to do it…

How it works…

See also

Scaling friendly font rendering with distance fields

Getting ready

How to do it…

Generating distance field fonts with Hiero

Distance field fonts shader

Rendering distance field fonts in Libgdx

How it works…

There's more…

Dynamic font effects using distance fields

Getting ready

How to do it…

How it works…

There's more…

7. Asset Management

Introduction

Getting to know AssetManager

Getting ready

How to do it…

How it works…

There's more…

See also

Asynchronous asset loading

Getting ready

How to do it…

How it works…

There's more…

See also

Creating custom asset loaders

Getting ready

How to do it…

Writing our own asset type

Writing our own asset loader

Summarizing...

How it works…

There's more…

See also

Managing groups of assets for bigger games

Getting ready

How to do it…

Giving shape to the idea

Empowering AssetManager

How it works…

There's more…

See also

8. User Interfaces with Scene2D

Introduction

Introducing the Scene2D API

Getting ready

How to do it…

Creating a custom actor

Rendering your custom actor

Manipulating an actor

Simple actions

Complex actions

How it works…

There's more…

See also

Widget collection overview

Getting ready

How to do it…

Label

Image

Button

TextButton

ImageButton

ImageTextButton

CheckBox

TextField

List

ScrollPane

SelectBox

ProgressBar

Slider

Touchpad

Stack

Tree

SplitPane

Window

Dialog

How it works…

There's more…

See also

Creating a basic menu screen using tables

Getting ready

How to do it…

How it works…

Expand

Fill

Uniform

Sizing

Padding and spacing

Alignment

Columns and rows

Defaults

There's more…

See also

Skin customization

Getting ready

How to do it…

How it works…

There's more…

See also

Creating new widgets

Getting ready

How to do it…

Creating a widget

Using a widget

How it works…

There's more…

9. The 2D Maps API

Introduction

Creating maps with Tiled and loading them into Libgdx

Getting ready

How to do it…

Creating a basic map with Tiled

Loading and rendering a Tiled map in Libgdx

How it works…

There's more…

Adding and querying map metadata

Getting ready

How to do it…

Object layers and properties in Tiled

Querying map metadata from Libgdx

How it works…

There's more…

See also

Developing your own map loaders and renderers

Getting ready

How to do it…

There's more…

10. Rigid Body Physics with Box2D

Introduction

Introducing Box2D

Getting ready

How to do it…

How it works…

There's more…

See also

Introducing more complex shapes

Getting ready

How to do it…

Generating JSON shape data

Loading JSON shape data into Libgdx

How it works…

There's more…

See also

Introducing joints

Getting ready

How to do it…

WeldJoint

DistanceJoint

RopeJoint

FrictionJoint

RevoluteJoint

PrismaticJoint

PulleyJoint

GearJoint

WheelJoint

There's more…

See also

Real-life joints example – bike simulator

Getting ready

How to do it…

There's more…

Reacting to collisions

Getting ready

How to do it…


How it works…

There's more…

See also

Sensors and collision filtering

Getting ready

How to do it…

Sensors

Group collision filtering

Flexible collision filtering

How it works…

There's more…

See also

Querying the world

Getting ready

How to do it…

Raycasting

Area querying

How it works…

There's more…

See also

Building a physics world from level data

Getting ready

How to do it…

Defining materials

Generating the physics metadata

Populating your world

How it works…

There's more…

See also

Implementing a deferred raycaster

Getting ready

How to do it…

The RayCastManager class

Using RayCastManager

How it works…

There's more…

See also

The fixed timestep approach

Getting ready

How to do it…

Variable timestep

Fixed timestep

Fixed timestep with interpolation

There's more…

See also

11. Third-party Libraries and Extras

Introduction

Making libraries compatible with GWT

Getting ready

How to do it…

There's more…

See also

Managing platform-specific code

Getting ready

How to do it…

There's more…

Smooth animations with Universal Tween Engine

Getting ready

How to do it…

Creating your accessor

Library usage

Tween – a core class

Organizing tweens

How it works…

Dynamic 2D lighting with Box2DLights

Getting ready

How to do it…

How it works…

RayHandler

Types of lights

There's more…

Adding support for localization

Getting ready

How to do it…

Creating language files

Managing languages

Usage example

There's more…

See also

Finite state machine and messaging

Getting ready

How to do it…

Creating the agents

Usage example

How it works…

There's more…

Component-based entity systems with Ashley

Getting ready

How to do it…

How it works…

There's more…

See also

Skeletal animations with Spine

Getting ready

How to do it…

How it works…

There's more…

12. Performance and Optimizations

Introduction

Profiling your application with VisualVM

Getting ready

How to do it…

Installing VisualVM

Changing the launcher

Monitoring and profiling

How it works…

There's more…

Using Libgdx features to avoid garbage collection

Getting ready

How to do it…

Collections

Caching

Object pooling

There's more…

Avoiding unnecessary render calls with frustum culling

Getting ready

How to do it…

How it works…

There's more…

13. Giving Back

Introduction

Releasing your Libgdx game on desktop

Getting ready

How to do it…

There's more…

See also

Releasing your Libgdx game on Android

Getting ready

How to do it…

There's more…

Releasing your Libgdx game on iOS

Getting ready

How to do it…

There's more…

Releasing your Libgdx game on browsers

Getting ready

How to do it…

There's more…

Working from sources

Getting ready

How to do it…

How it works…

See also

Creating a new test for your fresh feature

Getting ready

How to do it…

Sending a pull request on GitHub

Getting ready

How to do it…

There's more…

See also

Index