Cocos2d-x Cookbook

Book Image

Cocos2d-x Cookbook

By : Akihiro Matsuura

Book Image

Cocos2d-x Cookbook

By: Akihiro Matsuura

Overview of this book

Cocos2d-x Cookbook

Cocos2d-x Cookbook

Credits

About the Author

About the Author

About the Reviewers

About the Reviewers

www.PacktPub.com

www.PacktPub.com

Preface

Free Chapter

Getting Started with Cocos2d-x

Getting Started with Cocos2d-x

Setting up our Android Environment

Installing Cocos2d-x

Using the Cocos command

Building the project using Xcode

Building the project using Eclipse

Implementing multi-resolution support

Preparing your original game

Creating Sprites

Creating Sprites

Creating sprites

Getting the sprite's position and size

Manipulating sprites

Creating animations

Creating actions

Controlling actions

Calling functions with actions

Using a texture atlas

Using a batch node

Using 3D modals

Detecting collisions

Drawing a shape

Working with Labels

Working with Labels

Creating system font labels

Creating true type font labels

Creating bitmap font labels

Creating rich text

Building Scenes and Layers

Building Scenes and Layers

Creating scenes

Transitioning between scenes

Transitioning scenes with effects

Making original transitions for replacing scenes

Making original transitions for popping scenes

Creating layers

Creating modal layers

Creating GUIs

Creating buttons

Creating checkboxes

Creating loading bars

Creating sliders

Creating text fields

Creating scroll views

Creating page views

Creating list views

Playing Sounds

Playing background music

Playing a sound effect

Controlling volume, pitch, and balance

Pausing and resuming background music

Pausing and resuming sound effects

Playing background music and a sound effect by using AudioEngine

Working with Resource Files

Working with Resource Files

Selecting resource files

Managing resource files

Using .xml files

Using .plist files

Using .json files

Working with Hardware

Working with Hardware

Using native code

Changing the processing using the platform

Using the acceleration sensor

Keeping the screen on

Getting the maximum texture size

Controlling Physics

Controlling Physics

Using the physics engine

Detecting collisions

Changing gravity by using the acceleration sensor

Improving Games with Extra Features

Improving Games with Extra Features

Using Texture Packer

Using Tiled Map Editor

Getting the property of the object in the tiled map

Using Physics Editor

Using Glyph Designer

Taking Advantages

Taking Advantages

Using encrypted sprite sheets

Using encrypted zip files

Using encrypted SQLite files

Creating Observer Pattern

Networking with HTTP

Index

Customer Reviews

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Detecting collisions

When a collision between physics objects occurs, you want to take action against the physics bodies, for example, showing an explosion and showing a particle. In this recipe, you learn how to detect a collision in the physics world.

How to do it...

Firstly, you have to create the event listener in the init method as follows:

auto contactListener = 
EventListenerPhysicsContact::create();
contactListener->onContactBegin = [](PhysicsContact& contact){
    CCLOG("contact begin");
    auto shapeA = contact.getShapeA();
    auto bodyA = shapeA->getBody();
        
    auto shapeB = contact.getShapeB();
    auto bodyB = shapeB->getBody();
    return true;
};
this->getEventDispatcher()->addEventListenerWithSceneGraphPriority(contactListener, this);

Next, you have to set the contact test bit mask to the physics bodies that you want to check the collisions for. In this recipe, you set the wall body and the sprite body as follows:
```
auto wallBody = PhysicsBody::createEdgeBox...
```