public Matrix4f getViewProjectionMatrix() {
        return viewProjectionMatrix;
    }
Provides access to the view projection matrix.

 @return The result of multiplying the projection matrix by the view
    matrix. This matrix is required for rendering an object. It is
    precomputed to avoid computing it every time an object is rendered.
jme3-core/src/main/java/com/jme3/renderer/Camera.java