a class="citerefentry" href="gluQuadricTexture"><span class="citerefentry"><span class="refentrytitle">gluQuadricTexture</span></span></a>),
            texture coordinates are generated
            linearly such that where
            <math overflow="scroll">

                <mrow>
                    <mi mathvariant="italic">r</mi>
                    <mo>=</mo>
                    <mi mathvariant="italic">outer</mi>
                </mrow>
            </math>,
            the value at (<span class="emph