pan class="emphasis"><em>w</em></span>,
            depth coordinates range from
            <math overflow="scroll">

                <mn>-1</mn>
            </math>
            to 1,
            corresponding to the near and far clipping planes.
            <code class="function">glDepthRangef</code> specifies a linear mapping of the normalized depth coordinates
            in this range to window depth coordinates.
                        If a fixed-point depth representation is used, the parameters <em 