          For all other active variables, zero is written to <em class="parameter"><code>params</code></em>.
        </p>
        <p>
            For the property <code class="constant">GL_ATOMIC_COUNTER_BUFFER_INDEX</code>, a single integer identifying
            the index of the active atomic counter buffer containing an active
            variable is written to <em class="parameter"><code>params</code></em>.  If the variable is not an atomic counter
            uniform, the value -1 is written to <em cl