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187 lines
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<title>GLM: GLM_GTX_fast_square_root</title>
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<div id="projectname">GLM
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 <span id="projectnumber">0.9.5</span>
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<div class="header">
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<div class="summary">
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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="a00165.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:ga646eee2633e9de7274de9bc6f5af92b5"><td class="memTemplParams" colspan="2">template<typename genType > </td></tr>
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<tr class="memitem:ga646eee2633e9de7274de9bc6f5af92b5"><td class="memTemplItemLeft" align="right" valign="top">genType::value_type </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00197.html#ga646eee2633e9de7274de9bc6f5af92b5">fastDistance</a> (genType const &x, genType const &y)</td></tr>
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<tr class="separator:ga646eee2633e9de7274de9bc6f5af92b5"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga49dd9caa2853398474e5aae377259a22"><td class="memTemplParams" colspan="2">template<typename genType > </td></tr>
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<tr class="memitem:ga49dd9caa2853398474e5aae377259a22"><td class="memTemplItemLeft" align="right" valign="top">genType </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00197.html#ga49dd9caa2853398474e5aae377259a22">fastInverseSqrt</a> (genType const &x)</td></tr>
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<tr class="separator:ga49dd9caa2853398474e5aae377259a22"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga2e726cc8b9f02b7c09910858ea1afac6"><td class="memTemplParams" colspan="2">template<typename genType > </td></tr>
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<tr class="memitem:ga2e726cc8b9f02b7c09910858ea1afac6"><td class="memTemplItemLeft" align="right" valign="top">genType::value_type </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00197.html#ga2e726cc8b9f02b7c09910858ea1afac6">fastLength</a> (genType const &x)</td></tr>
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<tr class="separator:ga2e726cc8b9f02b7c09910858ea1afac6"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga2953e7426a420bb2b33affce7360ef40"><td class="memTemplParams" colspan="2">template<typename genType > </td></tr>
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<tr class="memitem:ga2953e7426a420bb2b33affce7360ef40"><td class="memTemplItemLeft" align="right" valign="top">genType </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00197.html#ga2953e7426a420bb2b33affce7360ef40">fastNormalize</a> (genType const &x)</td></tr>
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<tr class="separator:ga2953e7426a420bb2b33affce7360ef40"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gad57c343d2362c1469043adedeb8ef8eb"><td class="memTemplParams" colspan="2">template<typename genType > </td></tr>
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<tr class="memitem:gad57c343d2362c1469043adedeb8ef8eb"><td class="memTemplItemLeft" align="right" valign="top">genType </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00197.html#gad57c343d2362c1469043adedeb8ef8eb">fastSqrt</a> (genType const &x)</td></tr>
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<tr class="separator:gad57c343d2362c1469043adedeb8ef8eb"><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="a00030.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="ga646eee2633e9de7274de9bc6f5af92b5"></a>
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<div class="memitem">
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<table class="memname">
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<td class="memname">genType::value_type glm::fastDistance </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>
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<td class="paramkey"></td>
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<td class="paramtype">genType 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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</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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<a class="anchor" id="ga49dd9caa2853398474e5aae377259a22"></a>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">genType glm::fastInverseSqrt </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 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="ga2e726cc8b9f02b7c09910858ea1afac6"></a>
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<div class="memitem">
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<div class="memproto">
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<td class="memname">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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</tr>
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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="ga2953e7426a420bb2b33affce7360ef40"></a>
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<div class="memitem">
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<table class="memname">
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<td class="memname">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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</tr>
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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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</div>
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<a class="anchor" id="gad57c343d2362c1469043adedeb8ef8eb"></a>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">genType glm::fastSqrt </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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</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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