 current by calling
    <a class="citerefentry" href="glUseProgram"><span class="citerefentry"><span class="refentrytitle">glUseProgram</span></span></a>,
    the generic vertex attributes are tracked in such a way that the
    same values will be observed by attributes in the new program
    object that are also bound to
    <em class="parameter"><code>index</code></em>.</p><p>Attribute variable
    name-to-generic attribute index bindings for a program object
    can be explicitly assigned at any time by 