public Vector4f add(float addX, float addY, float addZ, float addW) {
        return new Vector4f(x + addX, y + addY, z + addZ, w + addW);
    }
<code>add</code> adds the provided values to this vector, creating a
new vector that is then returned.

@param addX
           the x value to add.
@param addY
           the y value to add.
@param addZ
           the z value to add.
@param addW
           the w value to add.
@return the result vector.
jme3-core/src/main/java/com/jme3/math/Vector4f.java