cocos2d-x | Cocos2d-x is a suite of open-source cross-platform | Game Engine library

by cocos2d C++ Version: Current License: No License

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kandi X-RAY | cocos2d-x Summary

cocos2d-x is a C++ library typically used in Gaming, Game Engine applications. cocos2d-x has no bugs, it has no vulnerabilities and it has medium support. You can download it from GitHub.

|Win32|Others| | ----|------| [![Build status](https://ci.appveyor.com/api/projects/status/nlgirox464j6ldg5/branch/v4?svg=true)](![Build Status(https://travis-ci.org/cocos2d/cocos2d-x.svg?branch=v4)](https://travis-ci.org/cocos2d/cocos2d-x). [cocos2d-x][1] is a multi-platform framework for building 2d games, interactive books, demos and other graphical applications. It is based on cocos2d-iphone, but instead of using Objective-C, it uses C++. It works on iOS, Android, macOS, Windows and Linux.

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Quality

Security

License

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cocos2d-x has a medium active ecosystem.
It has 15461 star(s) with 6964 fork(s). There are 1269 watchers for this library.
It had no major release in the last 12 months.
There are 1371 open issues and 3526 have been closed. On average issues are closed in 494 days. There are 189 open pull requests and 0 closed requests.
It has a neutral sentiment in the developer community.
The latest version of cocos2d-x is current.

cocos2d-x Support

Best in #Game Engine

Average in #Game Engine

cocos2d-x Support

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Average in #Game Engine

quality kandi Quality

cocos2d-x has 0 bugs and 0 code smells.

cocos2d-x Quality

Best in #Game Engine

Average in #Game Engine

cocos2d-x Quality

Best in #Game Engine

Average in #Game Engine

security Security

cocos2d-x has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
cocos2d-x code analysis shows 0 unresolved vulnerabilities.
There are 0 security hotspots that need review.

cocos2d-x Security

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cocos2d-x Security

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Average in #Game Engine

license License

cocos2d-x does not have a standard license declared.
Check the repository for any license declaration and review the terms closely.
Without a license, all rights are reserved, and you cannot use the library in your applications.

cocos2d-x License

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cocos2d-x License

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build Reuse

cocos2d-x releases are not available. You will need to build from source code and install.
Installation instructions, examples and code snippets are available.

cocos2d-x Reuse

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cocos2d-x Reuse

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cocos2d-x Key Features

Fast

Free

Easy to use

Community supported

[Cocos2d-x stable versions](http://www.cocos2d-x.org/download)

Scene management (workflow)

Transitions between scenes

Sprites and Sprite Sheets

Effects: Lens, Ripple, Waves, Liquid, etc.

Actions (behaviours):

Transformation Actions: Move, Rotate, Scale, Fade, Tint, etc.

Composable actions: Sequence, Spawn, Repeat, Reverse

Ease Actions: Exp, Sin, Cubic, Elastic, etc.

Misc actions: CallFunc, OrbitCamera, Follow, Tween

Basic menus and buttons

Integrated with physics engines: [Box2d][5] and [Chipmunk][6]

Particle system

Skeleton Animations: [Spine][7] and Armature support

Fonts:

Fast font rendering using Fixed and Variable width fonts

Support for .ttf fonts

Tile Map support: Orthogonal, Isometric and Hexagonal

Parallax scrolling

Motion Streak

Render To Texture

Touch/Accelerometer on mobile devices

Touch/Mouse/Keyboard on desktop

Sound Engine support

Integrated Slow motion/Fast forward

Fast and compressed textures: PVR compressed and uncompressed textures, ETC1 compressed textures, and more

Resolution Independent

Language: C++, with Lua and JavaScript bindings

Open Source Commercial Friendly(MIT): Compatible with open and closed source projects

OpenGL ES 2.0 (mobile) / OpenGL 2.1 (desktop) / metal(macos and iOS) based

cocos2d-x Examples and Code Snippets

See all related Code Snippets

cocos2d-x

Copy

Download

1. Clone the repo from GitHub.

         $ git clone https://github.com/cocos2d/cocos2d-x.git

2. After cloning the repo, please execute `download-deps.py` to download and install dependencies.

         $ cd cocos2d-x
         cocos2d-x $ python download-deps.py

3. After running `download-deps.py`.

         cocos2d-x $ git submodule update --init

Download stable versions

Runtime Requirements

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Should set up environment before starting a new game or running tests

```
$ cd cocos2d-x
$ ./setup.py
$ source FILE_TO_SAVE_SYSTEM_VARIABLE

```

Should invoke this script if using linux system

```
$ cd cocos2d-x
$ ./install-linux-deps.sh
```

Running Tests

How to start a new game

Copy

Download

$ cd cocos2d-x
$ ./setup.py
$ source FILE_TO_SAVE_SYSTEM_VARIABLE
$ cocos new MyGame -p com.your_company.mygame -l cpp -d NEW_PROJECTS_DIR
$ cd NEW_PROJECTS_DIR/MyGame
$ mkdir build
$ cd build
$ cocos run --proj-dir .. -p [mac|win32|android|linux|ios]

Trying to get user input to move sprite in Cocos2D-X

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float playerX = visibleSize.width / 2 + origin.x;
float playerY = visibleSize.height / 2 + origin.y;
    
auto player = Sprite::create("sprites/player.png");
if (player == nullptr)
{
    problemLoading("'sprites/player.png'");
}
else
{
    // position the sprite on the center of the screen
    player->setPosition(Vec2(playerX, playerY));

    // add the sprite as a child to this layer
    this->addChild(player, 0);
}

    // Keyboard events
auto keyboardListener = EventListenerKeyboard::create();

// add mutable specifier
keyboardListener->onKeyPressed = [playerX, playerY, player](EventKeyboard::KeyCode keyCode, Event* event) mutable
{
    switch (keyCode)
    {
    case EventKeyboard::KeyCode::KEY_W:
        playerY += 5.0f;
        break;
    case EventKeyboard::KeyCode::KEY_A:
        playerX -= 5.0f;
        break;
    case EventKeyboard::KeyCode::KEY_S:
        playerY -= 5.0f;
        break;
    case EventKeyboard::KeyCode::KEY_D:
        playerX += 5.0f;
        break;
    case EventKeyboard::KeyCode::KEY_ESCAPE:
        Director::getInstance()->end();
        break;
    }
    
    player->setPosition(playerX, playerY);
};
    _eventDispatcher->addEventListenerWithSceneGraphPriority(keyboardListener, this);

Cocos2d-x app code not allowing volume control buttons to work on iPhone or iPad

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CocosDenshion::SimpleAudioEngine::getInstance()->stopBackgroundMusic();
CocosDenshion::SimpleAudioEngine::getInstance()->playBackgroundMusic("background4.mp3", true);

Which EventDispatcher to use in cocos2d ? Node::EventDispatcher or Director::EventDispatcher?

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_eventDispatcher = _director->getEventDispatcher(); // Check CCNode.cpp

Director::getInstance()->getEventDispatcher()->addEventListenerWith..

this->getEventDispatcher()->addEventListenerWith..

_eventDispatcher->addEventListenerWith..

_eventDispatcher = _director->getEventDispatcher(); // Check CCNode.cpp

Director::getInstance()->getEventDispatcher()->addEventListenerWith..

this->getEventDispatcher()->addEventListenerWith..

_eventDispatcher->addEventListenerWith..

Warning after initializing particle effects in Cocos2dx - "libpng warning: iCCP: known incorrect sRGB profile"

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/* Getting the desired particleEffect position */    
const Vec2& desiredPos = testNode->getChildByName("blablablah")->getPosition();
std::string filePath = "/"; //assign a directory for the .plist

// Avoid exponentiation
if (!testNode->getChildByName("sampleParticle")) {
    auto p1 = ParticleSystemQuad::create(filePath + "/" + "test.plist");
    p1->setPosition(desiredPos);
    p1->resetSystem();
    p1->setName("sampleParticle");
    p1->setVisible(true);
    testNode->addChild(p1);
}

There is no sln file in proj.win32

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cd ProjectName/proj.win32

cmake ..

cd ProjectName/proj.win32

cmake ..

See all related Code Snippets

Community Discussions

Trending Discussions on cocos2d-x

Trying to get user input to move sprite in Cocos2D-X
Android 11 - System.loadLibrary for native C++ library takes 60+ seconds, works perfectly fast on Android 10 and below
Cocos2d-x v4.0 crashing in iPhone Simulator with Xcode 12, Xcode 12.1, Xcode 12.2
Cocos2d-x app code not allowing volume control buttons to work on iPhone or iPad
Which EventDispatcher to use in cocos2d ? Node::EventDispatcher or Director::EventDispatcher?
(Unity 2019.2) iOS build crashes 5 seconds after the application is killed by the user
Tiled map not rendered fully
Warning after initializing particle effects in Cocos2dx - "libpng warning: iCCP: known incorrect sRGB profile"
There is no sln file in proj.win32

Trending Discussions on cocos2d-x

QUESTION

Trying to get user input to move sprite in Cocos2D-X

Asked 2021-Sep-05 at 09:28

I'm trying to make user input of WASD move a sprite around in Cocos2D-X. I'm pretty sure I'm doing everything correct but it gives me this error: expression must be a modifiable lvalue.

Here is my code (Note: I'm new to Cocos2D-X, so it might be a bit messy)

float playerX = visibleSize.width / 2 + origin.x;
float playerY = visibleSize.height / 2 + origin.y;
    
auto player = Sprite::create("sprites/player.png");
if (player == nullptr)
{
    problemLoading("'sprites/player.png'");
}
else
{
    // position the sprite on the center of the screen
    player->setPosition(Vec2(playerX, playerY));

    // add the sprite as a child to this layer
    this->addChild(player, 0);
}

    // Keyboard events
auto keyboardListener = EventListenerKeyboard::create();
keyboardListener->onKeyPressed = [playerX, playerY](EventKeyboard::KeyCode keyCode, Event* event)
{
    switch (keyCode)
    {
    case EventKeyboard::KeyCode::KEY_W:
        playerY += 5.0f;
        break;
    case EventKeyboard::KeyCode::KEY_A:
        playerX -= 5.0f;
        break;
    case EventKeyboard::KeyCode::KEY_S:
        playerY -= 5.0f;
        break;
    case EventKeyboard::KeyCode::KEY_D:
        playerX += 5.0f;
        break;
    case EventKeyboard::KeyCode::KEY_ESCAPE:
        Director::getInstance()->end();
        break;
    }
};
    _eventDispatcher->addEventListenerWithSceneGraphPriority(keyboardListener, this);

There is four of the error and they all point to a different playerX/Y +=/-= 5.0f

ANSWER

Answered 2021-Sep-05 at 09:28

Try to use mutable specifier(which allows lambdas body to modify the objects captured by copy, and to call their non-const member functions):

float playerX = visibleSize.width / 2 + origin.x;
float playerY = visibleSize.height / 2 + origin.y;
    
auto player = Sprite::create("sprites/player.png");
if (player == nullptr)
{
    problemLoading("'sprites/player.png'");
}
else
{
    // position the sprite on the center of the screen
    player->setPosition(Vec2(playerX, playerY));

    // add the sprite as a child to this layer
    this->addChild(player, 0);
}

    // Keyboard events
auto keyboardListener = EventListenerKeyboard::create();

// add mutable specifier
keyboardListener->onKeyPressed = [playerX, playerY, player](EventKeyboard::KeyCode keyCode, Event* event) mutable
{
    switch (keyCode)
    {
    case EventKeyboard::KeyCode::KEY_W:
        playerY += 5.0f;
        break;
    case EventKeyboard::KeyCode::KEY_A:
        playerX -= 5.0f;
        break;
    case EventKeyboard::KeyCode::KEY_S:
        playerY -= 5.0f;
        break;
    case EventKeyboard::KeyCode::KEY_D:
        playerX += 5.0f;
        break;
    case EventKeyboard::KeyCode::KEY_ESCAPE:
        Director::getInstance()->end();
        break;
    }
    
    player->setPosition(playerX, playerY);
};
    _eventDispatcher->addEventListenerWithSceneGraphPriority(keyboardListener, this);

Source https://stackoverflow.com/questions/69061007

QUESTION

Android 11 - System.loadLibrary for native C++ library takes 60+ seconds, works perfectly fast on Android 10 and below

Asked 2020-Dec-14 at 12:42

In our game application for Android which is based on the game engine cocos2d-x, with most of the code being written in C++, we have a very strange and critical issue since Android 11:

When the native library gets loaded in onLoadNativeLibraries it now suddenly takes 60+ seconds. Before Android 11, it all worked fine and it loaded in 0.2-3 seconds. Now when you start the game, you have a 60+ seconds gray screen.

We already figured out that JNI_OnLoad gets called directly after the 60 second stall is over.

Here's the code of the onLoadNativeLibraries function:

protected void onLoadNativeLibraries()
{
    try
    {
        ApplicationInfo ai = getPackageManager().getApplicationInfo(getPackageName(), PackageManager.GET_META_DATA);
        Bundle bundle = ai.metaData;
        String libName = bundle.getString("android.app.lib_name");
        System.loadLibrary(libName); // line of 60 seconds stall
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
}

We already tried time profiling, but without any success. It just hows that it's spending a lot of time on that function. Also pausing via the debugging doesn't lead to any further clues. The native debugger doesn't show anything on the C++ side of the code.

Does anybody have any idea why this is happening or what we could try to figure it out? Any help would be highly appreciated :)

ANSWER

Answered 2020-Oct-29 at 18:06

Short Answer:

It's a bug in Android 11 fixed by google but not deployed yet.

Meanwhile, if you don't care about calling static and thread_local variables destructors in your lib when program is exiting/library is unloaded, pass the flag -fno-c++-static-destructors to the compiler. (see long answer for a more granular solution using clang annotations)

I used this flag on my project (not cocos2d) with no issue and lib is loading even faster than before.

Long Answer:

Unfortunately this is a performance regression introduced in android 11 (R) by the Google team. The issue is being tracked by google here.

To summarize, when System.loadLibrary() is called, the system registers a destructor for each of the C++ global variables contained in the loaded library, using __cxa_atexit()

Since Android 11 (R), the implementation of this function in android has changed:

In Q, __cxa_atexit uses a linked list of chunks, and calls mprotect twice on the single chunk to be modified.

In R, __cxa_atexit calls mprotect twice on a single contiguous array of handlers. Each array entry is 2 pointers.

This change regressed the performance drastically when they are many C++ global variables which seems to be the case in cocos2d so libraries.

Google has already implemented a fix https://android-review.googlesource.com/c/platform/bionic/+/1464716 but as stated in the issue:

this won't be in Android 11 until the March QPR at the earliest, and since this isn't a security issue it won't be mandatory for OEMs to actually take that patch.

Google Team suggests also some workarounds at the app level by removing or skipping the destructors on global variables:

For a particular global variable, the [[clang::no_destroy]] attribute skips the destructor call.

Pass -fno-c++-static-destructors to the compiler to skip the destructors for all static variables. This flag also skips destructors for thread_local variables. If there are thread_local variables with important destructors, those can be annotated with [[clang::always_destroy]] to override the compiler flag.

Pass -Wexit-time-destructors to the compiler to make it warn on every instance of an exit-time destructor, to highlight where the __cxa_atexit registrations are coming from.

Source https://stackoverflow.com/questions/64576236

QUESTION

(Unity 2019.2) iOS build crashes 5 seconds after the application is killed by the user

Asked 2020-Apr-27 at 15:59

Description

The application presents a crash 2~5 seconds after it's terminated by the user (i.e. force kill the app). This happens only on iOS builds on multiple unity versions (see details below). Most of the crashes reports are not arriving on Crashlytics. There are very few crashes on the console, even though we're consistently reproducing this error on a daily basis. The Android builds don't present the same error.

Steps to reproduce

Open the game
Wait until the loading scene is about to finish or until the game scene is fully loaded
Kill the application
Wait 2~5 seconds and see the crash report window

Reproduction rate: 80%
Devices used to test: iPhone SE, iPhone 7, iPhone 8, iPad Mini 4
Also observed the crash on: iPhone XS, iPhone XR

Additional information

The issue is iOS specific. We have the same build on Android working without issues.
Crash reports are not being captured by Crashlytics on most cases (see some of the crashes below).
Crashes happen only on the final steps of the loading, where the external SDKs are being initialized.
On TestFlight, the crash count is 0 for almost all builds, including the ones the users are reporting the crashes.
Using a debug button that calls the Application.Quit() method of Unity doesn't cause the application to crash, even though it takes a while to close.
The crash seems to be invariante to OS version and iOS device.

Technical information

Unity version: 2019.2.17f1. Also reproduced with 2019.2.0f1 and 2019.3.10f1.
External plugins are listed here.
Crash reports

Explorations

Here's a list of all solution attempts without success so far:

Remove GameAnalytics plugin
Remove IronSource plugin
Remove UnityIAP plugin
Workaround on PostProcess iOS
Set minimum OS version to 9.0
Comment all OnApplicationPause/Quit implementations (plugins included)
Enable Bitcode

ANSWER

Answered 2020-Apr-27 at 15:59

Solution

Description: The general problem is to have any piece of code that blocks the Main Thread on iOS when the application is finalizing (see this document for more information). In our case it is happening because of ongoing requests when the player kills the application. As we save the player progress on the server when the application is terminated (using Dispose() method), the request blocked the main thread, causing the crash. The solution is to remove this particular save. We tested a build including this fix and, so far, we have no crashes on 20 attempts of killing the game after the Game Scene is loaded. We haven't thought about this before because this piece of code is there since August of 2019 and it hasn't been touched since then. The problem started to happen only in February of 2020.

More information: Since the piece of problematic code was in the project since August of 2019 and the problem started to happen only on February of 2020, it's possible that the iOS version has something to do with it. We haven't investigate the changelog yet, but the oldest iOS version presenting the crash so far is iOS 13.2, released on October 28th, 2019.

Another possibility is that some change on our backend code caused the request to hang. As we use BestHTTP, by default all requests are aborted when the application is terminated. We haven't investigate if the execution order of Dispose vs. OnDisable/OnApplicationQuit can be the issue. Also, by default, the requests aborted by BestHTTP during Application Quit still call the callbacks. In our case, the callback for that Save Player is null, so this might not be the problem.

Related crashes: We're still facing some crashes on the loading scene. As far as we've seen, they happen when there's a request going on. The reproduction rate of those issues are way lower than the problem on Game Scene.

Hints: We had difficulty to retrieve the logs on Crashlytics, because most of them weren't being send. Here's a step-by-step of how to retrieve the log from the iOS device itself:

Open the Settings app on your iPhone/iPad device
Go to Privacy (appears below Battery on iOS 13)
Scroll to the bottom and open Analytics & Improvements
Open Analytics Data
Find the logs for the desired application

Source https://stackoverflow.com/questions/61435165

QUESTION

Warning after initializing particle effects in Cocos2dx - "libpng warning: iCCP: known incorrect sRGB profile"

Asked 2020-Feb-11 at 21:09

I am trying to load particle effects (in .plist format) in my Cocos2d-x game code, and I am facing the warning: "libpng warning: iCCP: known incorrect sRGB profile", as mentioned in the question. I have done some research on my end, and the other StackOverflow users who asked similar questions had this issue while loading .png files.

However, I am facing the same issue while initializing .plist files instead. Any insight on how to remove this warning would be helpful. Kindly note that I am not facing any issue with loading the .plist file as such, but the warnings are polluting my log streams.

Sample code:

ParticleSystem* testStar = testNode->getChildByName<ParticleSystem*>("star");
testStar->initWithFile(filePath + "/" + "test.plist"); //valid filePath
testStar->setVisible(true);

Also, to confirm that this isn't an issue with the .plist file itself, I tried loading the file manually on my UI editor tool, and that seemed to load it without any issues.

I am ready to provide more details on my environment if necessary. I tried doing the above in a blank project as well, and I was able to reproduce the same warning.

Cocos2d-x version: cocos2d-x-3.14.1

ANSWER

Answered 2020-Feb-11 at 21:09

I was able to solve this by using a sub-class of ParticleSystem instead of ParticleSystem itself. The sub-class I used is ParticleSystemQuad. Additionally, I realized that the initWithFile API was being called multiple times in my code, due to Cocos2D update schedulers. That may have been a cause for this warning.

To fix this warning, I created a fresh variable/system, and assigned a parent to it, while setting the position of the new variable to that of a well-known (desired position) node.

/* Getting the desired particleEffect position */    
const Vec2& desiredPos = testNode->getChildByName("blablablah")->getPosition();
std::string filePath = "/"; //assign a directory for the .plist

// Avoid exponentiation
if (!testNode->getChildByName("sampleParticle")) {
    auto p1 = ParticleSystemQuad::create(filePath + "/" + "test.plist");
    p1->setPosition(desiredPos);
    p1->resetSystem();
    p1->setName("sampleParticle");
    p1->setVisible(true);
    testNode->addChild(p1);
}

Source https://stackoverflow.com/questions/59932421

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install cocos2d-x

Mac OS X 10.7+, Xcode 8+. or Ubuntu 14.04+, CMake 3.1+. or Windows 7+, VS 2015. Python 2.7.5+(NOT Python 3). NDK r16+ is required to build Android games. Android Studio 3.0.0+ to build Android games(tested with 3.0.0). JRE or JDK 1.6+ is required for web publishing.
Mac OS X 10.7+, Xcode 8+
or Ubuntu 14.04+, CMake 3.1+
or Windows 7+, VS 2015
Python 2.7.5+(NOT Python 3)
NDK r16+ is required to build Android games
Android Studio 3.0.0+ to build Android games(tested with 3.0.0)
JRE or JDK 1.6+ is required for web publishing

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .