book

Learning AndEngine

Name: Learning AndEngine
Author: Martin Varga
ISBN: 9781783985968

by Martin Varga

September 2014

Beginner

286 pages

6h 16m

English

Packt Publishing

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Learning AndEngine
Table of Contents
Learning AndEngine
Credits
About the Author
Acknowledgments
About the Reviewers
www.PacktPub.com
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Preface
What this book covers
What you need for this book

Who this book is for
Conventions
Reader feedback
Customer support
Downloading the example codeDownloading the color images of this bookErrataPiracyQuestions
1. Setting Up an AndEngine Project
Prerequisites
Downloading and installing the required software
Downloading the Android SDKInstalling the Android SDKConfiguring the Eclipse IDE
Getting the AndEngine libraries
Selecting the correct branchAndEngine repositoriesDownloading the sourcesAdding AndEngine to the Eclipse IDE
Creating a new application
Creating a simple Android applicationDevice configurationBefore HoneycombHoneycomb until Ice Cream SandwichJelly Bean and laterRunning the applicationAdding AndEngineAdding the required projectsChanging the GameActivity to an AndEngine activityUnderstanding the activity lifecycleThe BaseGameActivity classThe onCreateEngineOptions methodThe onCreateResources methodThe onCreateScene methodThe onPopulateScene methodRunning the application
Understanding resolution policies
FixedResolutionPolicyFillResolutionPolicyRelativeResolutionPolicyRatioResolutionPolicyCropResolutionPolicy
Summary
2. Game Concept and Assets
The game conceptIdentifying the basic entities
Getting the assets
GraphicsGraphic formatsThe main characterThe enemyPlatform and cloudsPutting it all togetherSounds and musicAudio file formatsSound effectsMusic
Scene diagram
Summary
3. From Assets to Entities
Managing resourcesLoading graphicsBitmap texture formatTexture optionsInterpolationNearest-neighbor interpolationBilinear interpolationRepeatingAlpha channel settingsCreating the regionsBuilding the atlasTexture and alpha bleedingTexture bleedingAlpha bleedingUnloading graphicsLoading sounds and musicUnloading sounds and musicLoading fontsUnloading fontsPutting it all together
Entities
SceneAbstractSceneGameSceneBackgroundSprite, tiled sprite, and animated spriteMain characterPlayer classPlayerFactory classUsing the new entity and its factoryPlatforms and enemiesRunning the code
Summary
4. HUD and Text Display
Fonts and textStoring the font on a textureStoring special characters and international alphabetsCharacters from European languagesKorean, Chinese, Japanese, and other similar writing systemsOther writing systemsWorkaround for unsupported languagesOther limitations of the font texture
Writing text
HUD
Working with toasts
Localization
Debug output
Logging to LogCat from AndEngineLogging best practices
Summary
5. Basic Interactions
A simple animationAn animated spriteEntity modifiers
User input
TouchscreenTouch eventsThe scene touch listenerThe entity touch areaTouch area bindingsAccelerometerPausing and resuming the accelerometer
Collision detection
Handling collisionsCollision handlersThe collidesWith method
Using correct threads to perform actions
Summary
6. Physics
The physics engineBasic termsBody typesFixturesShapesDensityFrictionElasticitySensorThe physics worldForces and impulsesJoints
Adding physics
Adding a physics worldIntroducing a collidable entityRelation between physics bodies and entitiesAdding a physics body to the player entityAdding platformsControlling the player characterChanging the gravity vectorUsing forcesUsing impulsesSetting the velocity directly
Summary
7. Detecting Collisions and Reacting to Events
CollisionsDetecting collisionsThe player-platform collisionThe player-enemy collisionThe Enemy class and EnemyFactoryAdding enemies to the sceneUpdating the contact listener
Game events
The chase cameraAdding and removing platforms and enemiesDetecting the player character's deathScoreWrapping the world aroundRestarting the game after a player diesShowing a message on game overRestarting the game on tap
Playing sounds on events
Playing the jump soundPlaying the fall sound when the player's character dies
Summary
8. Advanced Physics
The Box2D Debug Draw extensionAdding Debug Draw to our AndEngine projectUsing Debug Draw in a game
Assembling bodies from fixtures
Creating an empty bodyThe head fixtureCreating the torsoCreating the legsAssembling the body
Collision filtering
CategoryThe category maskExample of categories and masksGroup index
Joints
The revolute jointThe distance jointThe prismatic jointThe line jointThe weld jointThe friction jointThe pulley jointThe gear jointThe mouse jointImplementing a revolute joint
Summary
9. Adding a Menu and Splash Scene
Managing multiple scenesA splash sceneUpdating the resource managerCreating the sceneThe menu sceneThe loading sceneThe scene managerPlugging in the SceneManager class
Storing values
Using preferencesSettingsPlaying sound according to the settingsHigh score
Summary
10. Polishing the Game
What is polishing?
Adding music
Life cycle of the media player
Adding animations using entity modifiers
Chaining modifiersModifiersEase functionsUsing the modifier callback hooks
Particle systems
Creating a flying in the clouds effectCreating a fire and smoke effect
Parallax background
VerticalParallaxEntityCreating a parallax background
Shaders
Summary
11. Testing, Publishing, and What's Next
Creating a production APK
Testing with the production APK
Testing on multiple devices
Using an emulator
Getting in touch with the community
Publishing the game to the Google Play store
Publishing to the beta stage firstCreating the applicationCrash reportsDebugging crashesPublishing to production
Promotion
Next steps
The first weekThe first month
Summary
Index

Content preview from Learning AndEngine

Joints

When we need to connect two bodies together in Box2D, we use joints. Joints always connect two bodies and never more. Multiple joints are then required to link more bodies together. A joint always connects a dynamic body with another body that can be either static, kinematic, or dynamic. Joints between kinematic and static bodies are allowed but have no effect.

Note

Joints update the body positions and rotations based on the type of joint. You can define two bodies in an arbitrary location and rotation, but if the joint restricts the position, for example, the bodies will immediately transform to the proper position after the simulation starts.

A joint can also specify whether the connected bodies should collide or not. We are going to see ...

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Publisher Resources

ISBN: 9781783985968

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Learning AndEngine

by Martin Varga

Joints

Note

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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