public Matrix3f adjoint(Matrix3f store) {
        if (store == null) {
            store = new Matrix3f();
        }

        store.m00 = m11 * m22 - m12 * m21;
        store.m01 = m02 * m21 - m01 * m22;
        store.m02 = m01 * m12 - m02 * m11;
        store.m10 = m12 * m20 - m10 * m22;
        store.m11 = m00 * m22 - m02 * m20;
        store.m12 = m02 * m10 - m00 * m12;
        store.m20 = m10 * m21 - m11 * m20;
        store.m21 = m01 * m20 - m00 * m21;
        store.m22 = m00 * m11 - m01 * m10;

        return store;
    }
Returns the adjoint in the specified storage. The current instance is
unaffected.

<p>If {@code this} and {@code store} are the same object, the result is
undefined.

@param store storage for the result, or null for a new Matrix3f
@return either {@code store} or a new Matrix3f
jme3-core/src/main/java/com/jme3/math/Matrix3f.java