LodGenerator - reduction of vertices

Hello everyone,
I tried to use the LodGenerator to reduce the vertices of meshes
but it was not successfull . Here is my code :

                Geometry geometry = (Geometry) node;
		Mesh mesh = geometry.getMesh();

		System.out.println("mesh.getVertexCount()=" + mesh.getVertexCount());
		System.out.println("mesh.getIndexBuffer().size()="
				+ mesh.getIndexBuffer().size());
		System.out.println("mesh.indexbuffer.getNumElements()="
				+ mesh.getBuffer(VertexBuffer.Type.Index).getNumElements());
		System.out.println("mesh.indexbuffer.getNumComponents())="
				+ mesh.getBuffer(VertexBuffer.Type.Index).getNumComponents());
		

		LodGenerator lodGenerator = new LodGenerator(geometry);
		VertexBuffer[] reducedMesh = lodGenerator.computeLods(
				LodGenerator.TriangleReductionMethod.PROPORTIONAL, 0.5f);
		System.out.println("reducedMesh.length=" + reducedMesh.length);
		VertexBuffer newIndexBuffer = reducedMesh[0];
		Buffer b = newIndexBuffer.getData();
		
		

		mesh.clearBuffer(newIndexBuffer.getBufferType());
		mesh.setBuffer(newIndexBuffer);
		

		System.out.println("NEU:");
	
		System.out.println("mesh.getIndexBuffer().size()="
				+ mesh.getIndexBuffer().size());
		System.out.println("new mesh.getVertexCount()="
				+ mesh.getVertexCount());
		System.out.println("newIndexBuffer.getNumElements()="
				+ newIndexBuffer.getNumElements());
		System.out.println("mesh.indexbuffer.getNumElements()="
				+ mesh.getBuffer(VertexBuffer.Type.Index).getNumElements());
		System.out.println("mesh.indexbuffer.getNumComponents()="
				+ mesh.getBuffer(VertexBuffer.Type.Index).getNumComponents());

And this is what i get as system output :

                                    mesh.getVertexCount()=17768
                                    mesh.getIndexBuffer().size()=39888
                                    mesh.indexbuffer.getNumElements()=13296
                                    mesh.indexbuffer.getNumComponents())=3
                                    reducedMesh.length=2
                                    NEU:
                                    mesh.getIndexBuffer().size()=39888
                                    new mesh.getVertexCount()=17768
                                    newIndexBuffer.getNumElements()=13296
                                    mesh.indexbuffer.getNumElements()=13296
                                    mesh.indexbuffer.getNumComponents()=3

it looks as if the old and new index buffers are the same.
What i am doing wrong? :frowning:

Please try to not double post.
see my answer here Brand new Lod Generator - #54 by nehon