with the argument
    <code class="constant">GL_CLIP_PLANEi</code>, where <code class="constant">i</code> is the
    plane number.</p><p>All clipping planes are initially defined as <code class="constant">(0, 0, 0,
    0)</code> in eye coordinates and are disabled.</p></div><div class="refsect1" title="Notes"><a id="notes"></a><h2>Notes</h2><p>It is always the case that <math overflow="scroll">


          <mi>GL_CLIP_PLANEi</mi>



          <mo>=</mo>



          <mi>GL_CLIP_PLANE0</mi>



          <mo>