used to construct an array, <code class="varname">gl_out[]</code>, whose members become
            available as inputs to the subsequent tessellation evaluation shader.
        </p>
        <p>
            The value of <code class="varname">gl_PointSize</code> (or the <code class="varname">gl_PointSize</code> member of the <code class="varname">gl_out[]</code>
            array, in the case of the tessellation control shader)
            is undefined after the vertex, tessellation control, and tessellation