Loading Blender animation into libGDX - libgdx

Question

Hi Blender & libGDX Gurus,
I am trying to load an blender animation into libGDX for an android app. So I created an animation using Blenders action editor, I exported this into .fbx format. I then ran the fbx-conv tool to create a .G3DB file. I then proceeded to upload this file into libGDX using the modelLoader.
Everything seems to work fine (I am not receiving any error messages) except that the screen is blank. I can't see any animations or the model.
I have run this code in a Samsung galaxy tablet running kitkat, nexus phone running marshmallow and an emulator, but the same result.
I went thru the tutorials and am using some of the code to upload one of my blender models. I still can't figure this out and I need help figuring this out.
Any help will be greatly appreciated.
Here is the link to the Blender file:
Animated Low-Poly Horse No Lights and no Camera
Here is my code where I am uploading the model in libGDX. I basically am using the code from the tutorials.
#Override
public void create () {
// Create camera sized to screens width/height with Field of View of 75 degrees
camera = new PerspectiveCamera(
75,
Gdx.graphics.getWidth(),
Gdx.graphics.getHeight());
// Move the camera 5 units back along the z-axis and look at the origin
camera.position.set(0f,0f,7f);
camera.lookAt(0f,0f,0f);
// Near and Far (plane) represent the minimum and maximum ranges of the camera in, um, units
camera.near = 0.1f;
camera.far = 300.0f;
camera.update();
// A ModelBatch to batch up geometry for OpenGL
modelBatch = new ModelBatch();
// Model loader needs a binary json reader to decode
UBJsonReader jsonReader = new UBJsonReader();
// Create a model loader passing in our json reader
G3dModelLoader modelLoader = new G3dModelLoader(jsonReader);
// Now load the model by name
// Note, the model (g3db file ) and textures need to be added to the assets folder of the Android proj
model = modelLoader.loadModel(Gdx.files.getFileHandle("AnimatedLowPolyHorseStageFenced_Ver5.g3db", Files.FileType.Internal));
// Now create an instance. Instance holds the positioning data, etc of an instance of your model
modelInstance = new ModelInstance(model);
//fbx-conv is supposed to perform this rotation for you... it doesnt seem to
modelInstance.transform.rotate(1, 0, 0, -90);
//move the model down a bit on the screen ( in a z-up world, down is -z ).
modelInstance.transform.translate(0, 0, -2);
// Finally we want some light, or we wont see our color. The environment gets passed in during
// the rendering process. Create one, then create an Ambient ( non-positioned, non-directional ) light.
environment = new Environment();
environment.set(new ColorAttribute(ColorAttribute.AmbientLight, 0.8f, 0.8f, 0.8f, 1.0f));
environment.add(new DirectionalLight().set(0.8f, 0.8f, 0.8f, -1f, -0.8f, -0.2f));
// You use an AnimationController to um, control animations. Each control is tied to the model instance
controller = new AnimationController(modelInstance);
// Pick the current animation by name
controller.setAnimation("Armature|ArmatureAction",1, new AnimationListener(){
#Override
public void onEnd(AnimationDesc animation) {
// this will be called when the current animation is done.
// queue up another animation called "balloon".
// Passing a negative to loop count loops forever. 1f for speed is normal speed.
//controller.queue("Armature|ArmatureAction",-1,1f,null,0f);
}
#Override
public void onLoop(AnimationDesc animation) {
// TODO Auto-generated method stub
}
});
}
#Override
public void resize(int width, int height) {
super.resize(width, height);
}
#Override
public void render () {
Gdx.gl.glViewport(0, 0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
//Gdx.gl.glClearColor(1, 1, 1, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT | GL20.GL_DEPTH_BUFFER_BIT);
// For some flavor, lets spin our camera around the Y axis by 1 degree each time render is called
// You need to call update on the animation controller so it will advance the animation. Pass in frame delta
controller.update(Gdx.graphics.getDeltaTime());
// Like spriteBatch, just with models! pass in the box Instance and the environment
modelBatch.begin(camera);
modelBatch.render(modelInstance, environment);
modelBatch.end();
}

Answer 1

When converting to G3DB with fbxconv you got a warning,
"Mesh contains vertices with zero bone weights".
Try the following steps:
- Add a a new bone to your blend
- Connect it to non-animated (or all) vertices
- Re-export & convert
If you still get the warning, repeat but connect the new bone to all vertices.
I know this is an old question, but i had a similar problem recently and this worked.