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  38. <div class="header">
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  39.   <div class="summary">
    40. 

  40. <a href="#func-members">Functions</a>  </div>
    41. 

  41.   <div class="headertitle">
    42. 

  42. <div class="title">GLM_GTX_fast_square_root<div class="ingroups"><a class="el" href="a00161.html">GTX Extensions (Experimental)</a></div></div>  </div>
    43. 

  43. </div><!--header-->
    44. 

  44. <div class="contents">
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  45. <table class="memberdecls">
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  46. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
    47. 

  47. Functions</h2></td></tr>
    48. 

  48. <tr class="memitem:gaac333418d0c4e0cc6d3d219ed606c238"><td class="memTemplParams" colspan="2">template&lt;typename genType &gt; </td></tr>
    49. 

  49. <tr class="memitem:gaac333418d0c4e0cc6d3d219ed606c238"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL genType&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00198.html#gaac333418d0c4e0cc6d3d219ed606c238">fastDistance</a> (genType x, genType y)</td></tr>
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  50. <tr class="separator:gaac333418d0c4e0cc6d3d219ed606c238"><td class="memSeparator" colspan="2">&#160;</td></tr>
    51. 

  51. <tr class="memitem:ga6d1ac559cd77d69119e30c3aca0e14b5"><td class="memTemplParams" colspan="2">template&lt;typename T , precision P, template&lt; typename, precision &gt; class vecType&gt; </td></tr>
    52. 

  52. <tr class="memitem:ga6d1ac559cd77d69119e30c3aca0e14b5"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL T&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00198.html#ga6d1ac559cd77d69119e30c3aca0e14b5">fastDistance</a> (vecType&lt; T, P &gt; const &amp;x, vecType&lt; T, P &gt; const &amp;y)</td></tr>
    53. 

  53. <tr class="separator:ga6d1ac559cd77d69119e30c3aca0e14b5"><td class="memSeparator" colspan="2">&#160;</td></tr>
    54. 

  54. <tr class="memitem:ga7f081b14d9c7035c8714eba5f7f75a8f"><td class="memTemplParams" colspan="2">template&lt;typename genType &gt; </td></tr>
    55. 

  55. <tr class="memitem:ga7f081b14d9c7035c8714eba5f7f75a8f"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL genType&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00198.html#ga7f081b14d9c7035c8714eba5f7f75a8f">fastInverseSqrt</a> (genType x)</td></tr>
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  56. <tr class="separator:ga7f081b14d9c7035c8714eba5f7f75a8f"><td class="memSeparator" colspan="2">&#160;</td></tr>
    57. 

  57. <tr class="memitem:ga903878071f92e51e551791e584a171a1"><td class="memTemplParams" colspan="2">template&lt;typename T , precision P, template&lt; typename, precision &gt; class vecType&gt; </td></tr>
    58. 

  58. <tr class="memitem:ga903878071f92e51e551791e584a171a1"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL vecType&lt; T, P &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00198.html#ga903878071f92e51e551791e584a171a1">fastInverseSqrt</a> (vecType&lt; T, P &gt; const &amp;x)</td></tr>
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  59. <tr class="separator:ga903878071f92e51e551791e584a171a1"><td class="memSeparator" colspan="2">&#160;</td></tr>
    60. 

  60. <tr class="memitem:gafe697d6287719538346bbdf8b1367c59"><td class="memTemplParams" colspan="2">template&lt;typename genType &gt; </td></tr>
    61. 

  61. <tr class="memitem:gafe697d6287719538346bbdf8b1367c59"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL genType&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00198.html#gafe697d6287719538346bbdf8b1367c59">fastLength</a> (genType x)</td></tr>
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  62. <tr class="separator:gafe697d6287719538346bbdf8b1367c59"><td class="memSeparator" colspan="2">&#160;</td></tr>
    63. 

  63. <tr class="memitem:gae28a3099cbd6404a4ea8ef22147ed7b0"><td class="memTemplParams" colspan="2">template&lt;typename T , precision P, template&lt; typename, precision &gt; class vecType&gt; </td></tr>
    64. 

  64. <tr class="memitem:gae28a3099cbd6404a4ea8ef22147ed7b0"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL T&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00198.html#gae28a3099cbd6404a4ea8ef22147ed7b0">fastLength</a> (vecType&lt; T, P &gt; const &amp;x)</td></tr>
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  66. <tr class="memitem:ga3b02c1d6e0c754144e2f1e110bf9f16c"><td class="memTemplParams" colspan="2">template&lt;typename genType &gt; </td></tr>
    67. 

  67. <tr class="memitem:ga3b02c1d6e0c754144e2f1e110bf9f16c"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL genType&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00198.html#ga3b02c1d6e0c754144e2f1e110bf9f16c">fastNormalize</a> (genType const &amp;x)</td></tr>
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    69. 

  69. <tr class="memitem:ga6c460e9414a50b2fc455c8f64c86cdc9"><td class="memTemplParams" colspan="2">template&lt;typename genType &gt; </td></tr>
    70. 

  70. <tr class="memitem:ga6c460e9414a50b2fc455c8f64c86cdc9"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL genType&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00198.html#ga6c460e9414a50b2fc455c8f64c86cdc9">fastSqrt</a> (genType x)</td></tr>
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  71. <tr class="separator:ga6c460e9414a50b2fc455c8f64c86cdc9"><td class="memSeparator" colspan="2">&#160;</td></tr>
    72. 

  72. <tr class="memitem:gaad9f601bbc3faa04dda384e4c4e1592c"><td class="memTemplParams" colspan="2">template&lt;typename T , precision P, template&lt; typename, precision &gt; class vecType&gt; </td></tr>
    73. 

  73. <tr class="memitem:gaad9f601bbc3faa04dda384e4c4e1592c"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL vecType&lt; T, P &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00198.html#gaad9f601bbc3faa04dda384e4c4e1592c">fastSqrt</a> (vecType&lt; T, P &gt; const &amp;x)</td></tr>
    74. 

  74. <tr class="separator:gaad9f601bbc3faa04dda384e4c4e1592c"><td class="memSeparator" colspan="2">&#160;</td></tr>
    75. 

  75. </table>
    76. 

  76. <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
    77. 

  77. <p>Fast but less accurate implementations of square root based functions. </p>
    78. 

  78. <ul>
    79. 

  79. <li>Sqrt optimisation based on Newton's method, www.gamedev.net/community/forums/topic.asp?topic id=139956</li>
    80. 

  80. </ul>
    81. 

  81. <p>&lt;<a class="el" href="a00027.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>
    82. 

  82. <h2 class="groupheader">Function Documentation</h2>
    83. 

  83. <a class="anchor" id="gaac333418d0c4e0cc6d3d219ed606c238"></a>
    84. 

  84. <div class="memitem">
    85. 

  85. <div class="memproto">
    86. 

  86.       <table class="memname">
    87. 

  87.         <tr>
    88. 

  88.           <td class="memname">GLM_FUNC_DECL genType glm::fastDistance </td>
    89. 

  89.           <td>(</td>
    90. 

  90.           <td class="paramtype">genType&#160;</td>
    91. 

  91.           <td class="paramname"><em>x</em>, </td>
    92. 

  92.         </tr>
    93. 

  93.         <tr>
    94. 

  94.           <td class="paramkey"></td>
    95. 

  95.           <td></td>
    96. 

  96.           <td class="paramtype">genType&#160;</td>
    97. 

  97.           <td class="paramname"><em>y</em>&#160;</td>
    98. 

  98.         </tr>
    99. 

  99.         <tr>
    100. 

  100.           <td></td>
    101. 

  101.           <td>)</td>
    102. 

  102.           <td></td><td></td>
    103. 

  103.         </tr>
    104. 

  104.       </table>
    105. 

  105. </div><div class="memdoc">
    106. 

  106. 

  107. <p>Faster than the common distance function but less accurate. </p>
    108. 

  108. <dl class="section see"><dt>See also</dt><dd><a class="el" href="a00198.html" title="Fast but less accurate implementations of square root based functions. ">GLM_GTX_fast_square_root</a> extension. </dd></dl>
    109. 

  109. 

  110. </div>
    111. 

  111. </div>
    112. 

  112. <a class="anchor" id="ga6d1ac559cd77d69119e30c3aca0e14b5"></a>
    113. 

  113. <div class="memitem">
    114. 

  114. <div class="memproto">
    115. 

  115.       <table class="memname">
    116. 

  116.         <tr>
    117. 

  117.           <td class="memname">GLM_FUNC_DECL T glm::fastDistance </td>
    118. 

  118.           <td>(</td>
    119. 

  119.           <td class="paramtype">vecType&lt; T, P &gt; const &amp;&#160;</td>
    120. 

  120.           <td class="paramname"><em>x</em>, </td>
    121. 

  121.         </tr>
    122. 

  122.         <tr>
    123. 

  123.           <td class="paramkey"></td>
    124. 

  124.           <td></td>
    125. 

  125.           <td class="paramtype">vecType&lt; T, P &gt; const &amp;&#160;</td>
    126. 

  126.           <td class="paramname"><em>y</em>&#160;</td>
    127. 

  127.         </tr>
    128. 

  128.         <tr>
    129. 

  129.           <td></td>
    130. 

  130.           <td>)</td>
    131. 

  131.           <td></td><td></td>
    132. 

  132.         </tr>
    133. 

  133.       </table>
    134. 

  134. </div><div class="memdoc">
    135. 

  135. 

  136. <p>Faster than the common distance function but less accurate. </p>
    137. 

  137. <dl class="section see"><dt>See also</dt><dd><a class="el" href="a00198.html" title="Fast but less accurate implementations of square root based functions. ">GLM_GTX_fast_square_root</a> extension. </dd></dl>
    138. 

  138. 

  139. </div>
    140. 

  140. </div>
    141. 

  141. <a class="anchor" id="ga7f081b14d9c7035c8714eba5f7f75a8f"></a>
    142. 

  142. <div class="memitem">
    143. 

  143. <div class="memproto">
    144. 

  144.       <table class="memname">
    145. 

  145.         <tr>
    146. 

  146.           <td class="memname">GLM_FUNC_DECL genType glm::fastInverseSqrt </td>
    147. 

  147.           <td>(</td>
    148. 

  148.           <td class="paramtype">genType&#160;</td>
    149. 

  149.           <td class="paramname"><em>x</em></td><td>)</td>
    150. 

  150.           <td></td>
    151. 

  151.         </tr>
    152. 

  152.       </table>
    153. 

  153. </div><div class="memdoc">
    154. 

  154. 

  155. <p>Faster than the common inversesqrt function but less accurate. </p>
    156. 

  156. <dl class="section see"><dt>See also</dt><dd><a class="el" href="a00198.html" title="Fast but less accurate implementations of square root based functions. ">GLM_GTX_fast_square_root</a> extension. </dd></dl>
    157. 

  157. 

  158. </div>
    159. 

  159. </div>
    160. 

  160. <a class="anchor" id="ga903878071f92e51e551791e584a171a1"></a>
    161. 

  161. <div class="memitem">
    162. 

  162. <div class="memproto">
    163. 

  163.       <table class="memname">
    164. 

  164.         <tr>
    165. 

  165.           <td class="memname">GLM_FUNC_DECL vecType&lt;T, P&gt; glm::fastInverseSqrt </td>
    166. 

  166.           <td>(</td>
    167. 

  167.           <td class="paramtype">vecType&lt; T, P &gt; const &amp;&#160;</td>
    168. 

  168.           <td class="paramname"><em>x</em></td><td>)</td>
    169. 

  169.           <td></td>
    170. 

  170.         </tr>
    171. 

  171.       </table>
    172. 

  172. </div><div class="memdoc">
    173. 

  173. 

  174. <p>Faster than the common inversesqrt function but less accurate. </p>
    175. 

  175. <dl class="section see"><dt>See also</dt><dd><a class="el" href="a00198.html" title="Fast but less accurate implementations of square root based functions. ">GLM_GTX_fast_square_root</a> extension. </dd></dl>
    176. 

  176. 

  177. </div>
    178. 

  178. </div>
    179. 

  179. <a class="anchor" id="gafe697d6287719538346bbdf8b1367c59"></a>
    180. 

  180. <div class="memitem">
    181. 

  181. <div class="memproto">
    182. 

  182.       <table class="memname">
    183. 

  183.         <tr>
    184. 

  184.           <td class="memname">GLM_FUNC_DECL genType glm::fastLength </td>
    185. 

  185.           <td>(</td>
    186. 

  186.           <td class="paramtype">genType&#160;</td>
    187. 

  187.           <td class="paramname"><em>x</em></td><td>)</td>
    188. 

  188.           <td></td>
    189. 

  189.         </tr>
    190. 

  190.       </table>
    191. 

  191. </div><div class="memdoc">
    192. 

  192. 

  193. <p>Faster than the common length function but less accurate. </p>
    194. 

  194. <dl class="section see"><dt>See also</dt><dd><a class="el" href="a00198.html" title="Fast but less accurate implementations of square root based functions. ">GLM_GTX_fast_square_root</a> extension. </dd></dl>
    195. 

  195. 

  196. </div>
    197. 

  197. </div>
    198. 

  198. <a class="anchor" id="gae28a3099cbd6404a4ea8ef22147ed7b0"></a>
    199. 

  199. <div class="memitem">
    200. 

  200. <div class="memproto">
    201. 

  201.       <table class="memname">
    202. 

  202.         <tr>
    203. 

  203.           <td class="memname">GLM_FUNC_DECL T glm::fastLength </td>
    204. 

  204.           <td>(</td>
    205. 

  205.           <td class="paramtype">vecType&lt; T, P &gt; const &amp;&#160;</td>
    206. 

  206.           <td class="paramname"><em>x</em></td><td>)</td>
    207. 

  207.           <td></td>
    208. 

  208.         </tr>
    209. 

  209.       </table>
    210. 

  210. </div><div class="memdoc">
    211. 

  211. 

  212. <p>Faster than the common length function but less accurate. </p>
    213. 

  213. <dl class="section see"><dt>See also</dt><dd><a class="el" href="a00198.html" title="Fast but less accurate implementations of square root based functions. ">GLM_GTX_fast_square_root</a> extension. </dd></dl>
    214. 

  214. 

  215. </div>
    216. 

  216. </div>
    217. 

  217. <a class="anchor" id="ga3b02c1d6e0c754144e2f1e110bf9f16c"></a>
    218. 

  218. <div class="memitem">
    219. 

  219. <div class="memproto">
    220. 

  220.       <table class="memname">
    221. 

  221.         <tr>
    222. 

  222.           <td class="memname">GLM_FUNC_DECL genType glm::fastNormalize </td>
    223. 

  223.           <td>(</td>
    224. 

  224.           <td class="paramtype">genType const &amp;&#160;</td>
    225. 

  225.           <td class="paramname"><em>x</em></td><td>)</td>
    226. 

  226.           <td></td>
    227. 

  227.         </tr>
    228. 

  228.       </table>
    229. 

  229. </div><div class="memdoc">
    230. 

  230. 

  231. <p>Faster than the common normalize function but less accurate. </p>
    232. 

  232. <dl class="section see"><dt>See also</dt><dd><a class="el" href="a00198.html" title="Fast but less accurate implementations of square root based functions. ">GLM_GTX_fast_square_root</a> extension. </dd></dl>
    233. 

  233. 

  234. </div>
    235. 

  235. </div>
    236. 

  236. <a class="anchor" id="ga6c460e9414a50b2fc455c8f64c86cdc9"></a>
    237. 

  237. <div class="memitem">
    238. 

  238. <div class="memproto">
    239. 

  239.       <table class="memname">
    240. 

  240.         <tr>
    241. 

  241.           <td class="memname">GLM_FUNC_DECL genType glm::fastSqrt </td>
    242. 

  242.           <td>(</td>
    243. 

  243.           <td class="paramtype">genType&#160;</td>
    244. 

  244.           <td class="paramname"><em>x</em></td><td>)</td>
    245. 

  245.           <td></td>
    246. 

  246.         </tr>
    247. 

  247.       </table>
    248. 

  248. </div><div class="memdoc">
    249. 

  249. 

  250. <p>Faster than the common sqrt function but less accurate. </p>
    251. 

  251. <dl class="section see"><dt>See also</dt><dd><a class="el" href="a00198.html" title="Fast but less accurate implementations of square root based functions. ">GLM_GTX_fast_square_root</a> extension. </dd></dl>
    252. 

  252. 

  253. </div>
    254. 

  254. </div>
    255. 

  255. <a class="anchor" id="gaad9f601bbc3faa04dda384e4c4e1592c"></a>
    256. 

  256. <div class="memitem">
    257. 

  257. <div class="memproto">
    258. 

  258.       <table class="memname">
    259. 

  259.         <tr>
    260. 

  260.           <td class="memname">GLM_FUNC_DECL vecType&lt;T, P&gt; glm::fastSqrt </td>
    261. 

  261.           <td>(</td>
    262. 

  262.           <td class="paramtype">vecType&lt; T, P &gt; const &amp;&#160;</td>
    263. 

  263.           <td class="paramname"><em>x</em></td><td>)</td>
    264. 

  264.           <td></td>
    265. 

  265.         </tr>
    266. 

  266.       </table>
    267. 

  267. </div><div class="memdoc">
    268. 

  268. 

  269. <p>Faster than the common sqrt function but less accurate. </p>
    270. 

  270. <dl class="section see"><dt>See also</dt><dd><a class="el" href="a00198.html" title="Fast but less accurate implementations of square root based functions. ">GLM_GTX_fast_square_root</a> extension. </dd></dl>
    271. 

  271. 

  272. </div>
    273. 

  273. </div>
    274. 

  274. </div><!-- contents -->
    275. 

  275. <!-- start footer part -->
    276. 

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    277. 

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  278. <img class="footer" src="doxygen.png" alt="doxygen"/>
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  279. </a> 1.8.10
    280. 

  280. </small></address>
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  282. </html>
    283.