public void setInverseTranslation(float[] translation) {
        if (translation.length != 3) {
            throw new IllegalArgumentException(
                    "Translation size must be 3.");
        }
        m03 = -translation[0];
        m13 = -translation[1];
        m23 = -translation[2];
    }
Alter the inverse-translation component of this 3-D coordinate transform.

@param translation the desired inverse translation (not null, length=3,
unaffected)
@throws IllegalArgumentException if translation doesn't have length=3.
jme3-core/src/main/java/com/jme3/math/Matrix4f.java