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<title>GLM_GTX_fast_square_root: Fast square root functions</title>
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<a href="#func-members">Functions</a> </div>
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<h1>GLM_GTX_fast_square_root: Fast square root functions</h1> </div>
<div class="ingroups"><a class="el" href="a00152.html">GTX Extensions (Experimental)</a></div></div>
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<p>Fast but less accurate implementations of square root based functions.
<a href="#_details">More...</a></p>
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Functions</h2></td></tr>
<tr><td class="memTemplParams" colspan="2">template&lt;typename genType &gt; </td></tr>
<tr><td class="memTemplItemLeft" align="right" valign="top">genType::value_type&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00183.html#gaa576cf70903b0bc1631fa32ebadd0134">fastDistance</a> (genType const &amp;x, genType const &amp;y)</td></tr>
<tr><td class="memTemplParams" colspan="2">template&lt;typename genType &gt; </td></tr>
<tr><td class="memTemplItemLeft" align="right" valign="top">genType&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00183.html#gad8adfc67c842b9f2fa9dc1b251cfc097">fastInverseSqrt</a> (genType const &amp;x)</td></tr>
<tr><td class="memTemplParams" colspan="2">template&lt;typename genType &gt; </td></tr>
<tr><td class="memTemplItemLeft" align="right" valign="top">genType::value_type&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00183.html#ga7653f1b39ef2ee1b6633842238bef911">fastLength</a> (genType const &amp;x)</td></tr>
<tr><td class="memTemplParams" colspan="2">template&lt;typename genType &gt; </td></tr>
<tr><td class="memTemplItemLeft" align="right" valign="top">genType&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00183.html#gafa857a1f03e384286b9509b91e3fec1b">fastNormalize</a> (genType const &amp;x)</td></tr>
<tr><td class="memTemplParams" colspan="2">template&lt;typename genType &gt; </td></tr>
<tr><td class="memTemplItemLeft" align="right" valign="top">genType&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00183.html#gab351f0ee922133ec048453e133ea8c8a">fastSqrt</a> (genType const &amp;x)</td></tr>
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<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>Fast but less accurate implementations of square root based functions. </p>
<ul>
<li>Sqrt optimisation based on Newton's method, www.gamedev.net/community/forums/topic.asp?topic id=139956</li>
</ul>
<p>&lt;<a class="el" href="a00039.html" title="OpenGL Mathematics (glm.g-truc.net)">glm/gtx/fast_square_root.hpp</a>&gt; need to be included to use these functionalities. </p>
<hr/><h2>Function Documentation</h2>
<a class="anchor" id="gaa576cf70903b0bc1631fa32ebadd0134"></a><!-- doxytag: member="glm::fastDistance" ref="gaa576cf70903b0bc1631fa32ebadd0134" args="(genType const &amp;x, genType const &amp;y)" -->
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<td class="memname">genType::value_type glm::fastDistance </td>
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<td class="paramtype">genType const &amp;&#160;</td>
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<p>Faster than the common distance function but less accurate. </p>
<p>From GLM_GTX_fast_square_root extension. </p>
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<a class="anchor" id="gad8adfc67c842b9f2fa9dc1b251cfc097"></a><!-- doxytag: member="glm::fastInverseSqrt" ref="gad8adfc67c842b9f2fa9dc1b251cfc097" args="(genType const &amp;x)" -->
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<td class="memname">genType glm::fastInverseSqrt </td>
<td>(</td>
<td class="paramtype">genType const &amp;&#160;</td>
<td class="paramname"><em>x</em></td><td>)</td>
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<p>Faster than the common inversesqrt function but less accurate. </p>
<p>From GLM_GTX_fast_square_root extension. </p>
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<a class="anchor" id="ga7653f1b39ef2ee1b6633842238bef911"></a><!-- doxytag: member="glm::fastLength" ref="ga7653f1b39ef2ee1b6633842238bef911" args="(genType const &amp;x)" -->
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<td class="memname">genType::value_type glm::fastLength </td>
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<p>Faster than the common length function but less accurate. </p>
<p>From GLM_GTX_fast_square_root extension. </p>
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</div>
<a class="anchor" id="gafa857a1f03e384286b9509b91e3fec1b"></a><!-- doxytag: member="glm::fastNormalize" ref="gafa857a1f03e384286b9509b91e3fec1b" args="(genType const &amp;x)" -->
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<td class="memname">genType glm::fastNormalize </td>
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<td class="paramname"><em>x</em></td><td>)</td>
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<p>Faster than the common normalize function but less accurate. </p>
<p>From GLM_GTX_fast_square_root extension. </p>
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<a class="anchor" id="gab351f0ee922133ec048453e133ea8c8a"></a><!-- doxytag: member="glm::fastSqrt" ref="gab351f0ee922133ec048453e133ea8c8a" args="(genType const &amp;x)" -->
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<td class="memname">genType glm::fastSqrt </td>
<td>(</td>
<td class="paramtype">genType const &amp;&#160;</td>
<td class="paramname"><em>x</em></td><td>)</td>
<td></td>
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<p>Faster than the common sqrt function but less accurate. </p>
<p>From GLM_GTX_fast_square_root extension. </p>
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