public void loadIdentity() {
        m01 = m02 = m03 = 0.0f;
        m10 = m12 = m13 = 0.0f;
        m20 = m21 = m23 = 0.0f;
        m30 = m31 = m32 = 0.0f;
        m00 = m11 = m22 = m33 = 1.0f;
    }
Configures as an identity matrix (diagonals = 1, other elements = 0).
jme3-core/src/main/java/com/jme3/math/Matrix4f.java