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<title>0.9.6: GLM_GTX_fast_square_root</title>
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<div id="projectname">0.9.6
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<a href="#func-members">Functions</a> </div>
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<div class="headertitle">
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<div class="title">GLM_GTX_fast_square_root<div class="ingroups"><a class="el" href="a00160.html">GTX Extensions (Experimental)</a></div></div> </div>
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<div class="contents">
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
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Functions</h2></td></tr>
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<tr class="memitem:gaac333418d0c4e0cc6d3d219ed606c238"><td class="memTemplParams" colspan="2">template<typename genType > </td></tr>
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<tr class="memitem:gaac333418d0c4e0cc6d3d219ed606c238"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL genType </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00196.html#gaac333418d0c4e0cc6d3d219ed606c238">fastDistance</a> (genType x, genType y)</td></tr>
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<tr class="separator:gaac333418d0c4e0cc6d3d219ed606c238"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga6d1ac559cd77d69119e30c3aca0e14b5"><td class="memTemplParams" colspan="2">template<typename T , precision P, template< typename, precision > class vecType> </td></tr>
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<tr class="memitem:ga6d1ac559cd77d69119e30c3aca0e14b5"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL T </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00196.html#ga6d1ac559cd77d69119e30c3aca0e14b5">fastDistance</a> (vecType< T, P > const &x, vecType< T, P > const &y)</td></tr>
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<tr class="separator:ga6d1ac559cd77d69119e30c3aca0e14b5"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga7f081b14d9c7035c8714eba5f7f75a8f"><td class="memTemplParams" colspan="2">template<typename genType > </td></tr>
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<tr class="memitem:ga7f081b14d9c7035c8714eba5f7f75a8f"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL genType </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00196.html#ga7f081b14d9c7035c8714eba5f7f75a8f">fastInverseSqrt</a> (genType x)</td></tr>
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<tr class="separator:ga7f081b14d9c7035c8714eba5f7f75a8f"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga903878071f92e51e551791e584a171a1"><td class="memTemplParams" colspan="2">template<typename T , precision P, template< typename, precision > class vecType> </td></tr>
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<tr class="memitem:ga903878071f92e51e551791e584a171a1"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL vecType< T, P > </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00196.html#ga903878071f92e51e551791e584a171a1">fastInverseSqrt</a> (vecType< T, P > const &x)</td></tr>
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<tr class="separator:ga903878071f92e51e551791e584a171a1"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga70aa3c80d8bb22e021c6c3ebdcf8e3ee"><td class="memTemplParams" colspan="2">template<typename genType > </td></tr>
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<tr class="memitem:ga70aa3c80d8bb22e021c6c3ebdcf8e3ee"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL genType::value_type </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00196.html#ga70aa3c80d8bb22e021c6c3ebdcf8e3ee">fastLength</a> (genType const &x)</td></tr>
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<tr class="separator:ga70aa3c80d8bb22e021c6c3ebdcf8e3ee"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga3b02c1d6e0c754144e2f1e110bf9f16c"><td class="memTemplParams" colspan="2">template<typename genType > </td></tr>
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<tr class="memitem:ga3b02c1d6e0c754144e2f1e110bf9f16c"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL genType </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00196.html#ga3b02c1d6e0c754144e2f1e110bf9f16c">fastNormalize</a> (genType const &x)</td></tr>
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<tr class="separator:ga3b02c1d6e0c754144e2f1e110bf9f16c"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga6c460e9414a50b2fc455c8f64c86cdc9"><td class="memTemplParams" colspan="2">template<typename genType > </td></tr>
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<tr class="memitem:ga6c460e9414a50b2fc455c8f64c86cdc9"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL genType </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00196.html#ga6c460e9414a50b2fc455c8f64c86cdc9">fastSqrt</a> (genType x)</td></tr>
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<tr class="separator:ga6c460e9414a50b2fc455c8f64c86cdc9"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<p>Fast but less accurate implementations of square root based functions. </p>
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<ul>
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<li>Sqrt optimisation based on Newton's method, www.gamedev.net/community/forums/topic.asp?topic id=139956</li>
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</ul>
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<p><<a class="el" href="a00026.html" title="OpenGL Mathematics (glm.g-truc.net) ">glm/gtx/fast_square_root.hpp</a>> need to be included to use these functionalities. </p>
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<h2 class="groupheader">Function Documentation</h2>
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<a class="anchor" id="gaac333418d0c4e0cc6d3d219ed606c238"></a>
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<td class="memname">GLM_FUNC_DECL genType glm::fastDistance </td>
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<td>(</td>
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<td class="paramtype">genType </td>
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<td class="paramname"><em>x</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">genType </td>
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<td class="paramname"><em>y</em> </td>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</div><div class="memdoc">
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<p>Faster than the common distance function but less accurate. </p>
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<p>From GLM_GTX_fast_square_root extension. </p>
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</div>
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<a class="anchor" id="ga6d1ac559cd77d69119e30c3aca0e14b5"></a>
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<td class="memname">GLM_FUNC_DECL T glm::fastDistance </td>
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<td>(</td>
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<td class="paramtype">vecType< T, P > const & </td>
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<td class="paramname"><em>x</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">vecType< T, P > const & </td>
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<td class="paramname"><em>y</em> </td>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Faster than the common distance function but less accurate. </p>
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<p>From GLM_GTX_fast_square_root extension. </p>
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</div>
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</div>
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<a class="anchor" id="ga7f081b14d9c7035c8714eba5f7f75a8f"></a>
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<td class="memname">GLM_FUNC_DECL genType glm::fastInverseSqrt </td>
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<td>(</td>
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<td class="paramtype">genType </td>
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<td class="paramname"><em>x</em></td><td>)</td>
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<td></td>
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</table>
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</div><div class="memdoc">
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<p>Faster than the common inversesqrt function but less accurate. </p>
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<p>From GLM_GTX_fast_square_root extension. </p>
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</div>
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<a class="anchor" id="ga903878071f92e51e551791e584a171a1"></a>
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<td class="memname">GLM_FUNC_DECL vecType<T, P> glm::fastInverseSqrt </td>
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<td>(</td>
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<td class="paramtype">vecType< T, P > const & </td>
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<td class="paramname"><em>x</em></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Faster than the common inversesqrt function but less accurate. </p>
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<p>From GLM_GTX_fast_square_root extension. </p>
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</div>
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</div>
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<a class="anchor" id="ga70aa3c80d8bb22e021c6c3ebdcf8e3ee"></a>
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<td class="memname">GLM_FUNC_DECL genType::value_type glm::fastLength </td>
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<td>(</td>
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<td class="paramtype">genType const & </td>
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<td class="paramname"><em>x</em></td><td>)</td>
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<td></td>
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</table>
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</div><div class="memdoc">
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<p>Faster than the common length function but less accurate. </p>
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<p>From GLM_GTX_fast_square_root extension. </p>
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</div>
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</div>
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<a class="anchor" id="ga3b02c1d6e0c754144e2f1e110bf9f16c"></a>
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<div class="memproto">
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<table class="memname">
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<td class="memname">GLM_FUNC_DECL genType glm::fastNormalize </td>
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<td>(</td>
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<td class="paramtype">genType const & </td>
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<td class="paramname"><em>x</em></td><td>)</td>
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<td></td>
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</table>
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</div><div class="memdoc">
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<p>Faster than the common normalize function but less accurate. </p>
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<p>From GLM_GTX_fast_square_root extension. </p>
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</div>
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<a class="anchor" id="ga6c460e9414a50b2fc455c8f64c86cdc9"></a>
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<div class="memitem">
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<div class="memproto">
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<td class="memname">GLM_FUNC_DECL genType glm::fastSqrt </td>
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<td>(</td>
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<td class="paramtype">genType </td>
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<td class="paramname"><em>x</em></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Faster than the common sqrt function but less accurate. </p>
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<p>From GLM_GTX_fast_square_root extension. </p>
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</div>
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</div>
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