public Vector4f toVector4f() {
        return new Vector4f(r, g, b, a);
    }
Transform this <code>ColorRGBA</code> to a <code>Vector4f</code> using
x = r, y = g, z = b, w = a.
This method is useful for shader assignments.

@return A <code>Vector4f</code> containing the RGBA value of this <code>ColorRGBA</code>.
jme3-core/src/main/java/com/jme3/math/ColorRGBA.java