public void updateBound() {
        VertexBuffer posBuf = getBuffer(VertexBuffer.Type.Position);
        if (meshBound != null && posBuf != null) {
            meshBound.computeFromPoints((FloatBuffer) posBuf.getData());
        }
    }
Updates the bounding volume of this mesh.
The method does nothing if the mesh has no {@link Type#Position} buffer.
It is expected that the position buffer is a float buffer with 3 components.
jme3-core/src/main/java/com/jme3/scene/Mesh.java