libgdx-liquidfun

An integration of Liquidfun to Libgdx. Based on previous integrations:

• gdx-liquidfun
• gdx-liquidfun-extension

Fluid simulations are CPU-intensive operations. This is why Liquidfun is implemented in C++. The JNI is used to make the link between Java and C++. A few setup steps are therefore required before being able to use Liquidfun inside your Libgdx project.

Installation

Adapted from here

These instructions only consider the desktop (Linux 32 bits & 64 bits) and android platforms.

Please refer to the build section for other platforms.

Step1: removing Box2D

This extension already includes all the code for Box2D. So if you are currently using Box2D in your project you have to remove it to keep everything clean. If you're not using Box2D you can skip this and continue with the second step.

To remove the Box2D dependecies you have to open up the build.gradle file in your root directory. Here are the dependencies you have to remove:

Core Dependency:

compile "com.badlogicgames.gdx:gdx-box2d:$gdxVersion"

Desktop Dependency:

compile "com.badlogicgames.gdx:gdx-box2d-platform:$gdxVersion:natives-desktop"

Android Dependency:

compile "com.badlogicgames.gdx:gdx-box2d:$gdxVersion"
natives "com.badlogicgames.gdx:gdx-box2d-platform:$gdxVersion:natives-armeabi"
natives "com.badlogicgames.gdx:gdx-box2d-platform:$gdxVersion:natives-armeabi-v7a"
natives "com.badlogicgames.gdx:gdx-box2d-platform:$gdxVersion:natives-x86"

Step 2: Adding new dependecies

Now you have to add the new dependencies for the new files. Those are the lines you have to add:

Core Dependency:

compile fileTree(dir: 'libs', include: '*.jar')

Desktop Dependency:

compile fileTree(dir: '../core/libs', include: '*.jar')
compile fileTree(dir: 'libs', include: '*.so')

Android Dependency:

compile fileTree(dir: '../core/libs', include: '*.jar')
compile fileTree(dir: 'libs', include: '*.so')

Step 3: Adding the files

Finaly, you need to add the actual files. You can find them inside the libs folder of this repository. Place the files as follows (create the libs folders if needed):

gdx-liquidfun.jar into core/libs

gdx-liquidfun-natives.jar into desktop/libs

libgdx-liquidfun.so from libs/arm64-v8a into android/libs/arm64-v8a

libgdx-liquidfun.so from libs/armeabi into android/libs/armeabi

libgdx-liquidfun.so from libs/armeabi-v7a into android/libs/armeabi-v7a

libgdx-liquidfun.so from libs/x86 into android/libs/x86

libgdx-liquidfun.so from libs/x86_64 into android/libs/x86_64

NB: you can also remove the libgdx-box2d.so files from those directories

Step 4: Testing

Rebuild your project and try the code: demo/Demo.java

More platforms

HTML

It is not possible to use this extension in an HTML project, because of the native code (C++).

iOS

You have to generate the .a file, see below

Windows

You have to generate the .ddl file, see below

Build

The extensions files of the libs folder can be built from the sources. This allows you to build this extension for other platforms (e.g. iOS and Windows). To do so, you need to use ant to generate the libs files from the jni sources. Here is how to proceed:

• Go to the jni folder
• Configure Application.mk (specify the supported Android architectures by listing them on the first line)
• Configure build.xml (add/remove platform targets)
• Configure the individual builder-*.xml files. For instance, set the path of the Android NDK in builder-android32.xml. If you have installed the NDK from Android studio, the path should look like ~/Android/Sdk/ndk-bundle
• Run the command ant

The extensions files are generated in the libs folder.