Can we have gltf renderer for Android?

[ravip]

Thanks to KhronosGroup for nice specifications of GLTF, a runtime 3D format.

I can see GLTFSceneKit plugin is available for iOS but there is no extensiion available to support gltf on Andorid. I have seen many people are looking out for good plugin / extension to support gltf on Android, a widely used mobile operating system.

Can we get plugin / extension for 3D rendering of gltf for Android?

[javagl]

There are libraries like jMonkeyEngine that should work on Android ( https://jmonkeyengine.github.io/wiki/jme3/android.html ) and they recently announced that they support glTF ( #1202 ).

(Internally, I started working on a jgltf-viewer-android based on https://github.com/javagl/JglTF , but this will still take some time....)

[nishantdande]

Hi,

We have tried extending https://github.com/javagl/JglTF for android. So, below is our findings -

In Android, I have used all required library which are required to render gltf model. Library as below -
jgltf-impl-v1-2.0.0-SNAPSHOT.jar
jgltf-impl-v2-2.0.0-SNAPSHOT.jar
jgltf-model-2.0.0-SNAPSHOT.jar
jgltf-obj-2.0.0-SNAPSHOT.jar
jgltf-viewer-2.0.0-SNAPSHOT.jar
jgltf-viewer-jogl-2.0.0-SNAPSHOT.jar

After successfully gradle sync, I used AbstractGltfViewer class for android compatibility. But unfortunately I am getting build error as below -
Error:java.lang.ClassNotFoundException: Class de.javagl.obj.ReadableObj not found
Error:Execution failed for task ':app:transformClassesWithDesugarForDebug'.

com.android.build.api.transform.TransformException: java.lang.RuntimeException: java.lang.RuntimeException: com.android.ide.common.process.ProcessException: Error while executing java process with main class com.google.devtools.build.android.desugar.Desugar with arguments {--input C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\3.jar --output C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\desugar\debug\4.jar --input C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\9.jar --output C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\desugar\debug\10.jar --input C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\8.jar --output C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\desugar\debug\9.jar --input C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\2.jar --output C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\desugar\debug\3.jar --input C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\16.jar --output C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\desugar\debug\17.jar --input C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\classes\debug --output C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\desugar\debug\0 --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\classes\debug --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\0.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\1.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\2.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\3.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\4.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\5.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\6.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\7.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\8.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\9.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\10.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\11.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\12.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\13.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\14.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\15.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\16.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\17.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\18.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\19.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\20.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\21.jar --classpath_entry C:\Users\Nishant Dande\Desktop\GLTFModel\app\build\intermediates\transforms\stackFramesFixer\debug\22.jar --bootclasspath_entry D:\nishant\tools\android-sdk_r24.4.1-windows\android-sdk-windows\platforms\android-26\android.jar --bootclasspath_entry D:\nishant\tools\android-sdk_r24.4.1-windows\android-sdk-windows\platforms\android-26\optional\org.apache.http.legacy.jar --bootclasspath_entry C:\Program Files\Android\Android Studio\jre\jre\lib\resources.jar --bootclasspath_entry C:\Program Files\Android\Android Studio\jre\jre\lib\rt.jar --bootclasspath_entry C:\Program Files\Android\Android Studio\jre\jre\lib\jsse.jar --bootclasspath_entry C:\Program Files\Android\Android Studio\jre\jre\lib\jce.jar --bootclasspath_entry C:\Program Files\Android\Android Studio\jre\jre\lib\charsets.jar --min_sdk_version 15 --desugar_try_with_resources_if_needed --desugar_try_with_resources_omit_runtime_classes}
Information:BUILD FAILED in 5s
Information:2 errors
Information:0 warnings
Information:See complete output in console

Please share your view on above error and please let me know how to use Jgltf Java Library in Android?

[javagl]

Note that JglTF is not yet supposed to work "perfectly" with Android. During the update from glTF 1.0 to glTF 2.0 I tried to address some of the issues mentioned in javagl/JglTF#4 , but there may still be some incompatibilites. I'm still working on all this.

However, in this case, the message

Error:java.lang.ClassNotFoundException: Class de.javagl.obj.ReadableObj not found

indicates that it dos not seem to find the OBJ loader. This is one of my other projects, available at https://github.com/javagl/Obj and in Maven Central, and declared as a dependency in the POM at https://github.com/javagl/JglTF/blob/master/jgltf-obj/pom.xml#L39

However, for the viewer itself, you should not need the jgltf-obj library. So for the first tests, you could just omit jgltf-obj.

(I'll try to allocate some more time for getting all this up and running on Android. There really seems to be some demand for that...)

[nishantdande]

Thank you very much. If you have any glTF repo for android, please share with me. So that I will also try to contribute for Android glTF project.

[donmccurdy]

Going to mark this as closed, as we're currently not tracking implementations closely on this repo, but would be excited to hear about progress on Android as well.