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  6. <title>GLM_GTX_ulp: Accuracy measurement</title>
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  37.       <li><a href="index.html"><span>Main&#160;Page</span></a></li>
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  45. <div class="header">
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  47. <a href="#func-members">Functions</a>  </div>
    48. 

  48.   <div class="headertitle">
    49. 

  49. <div class="title">GLM_GTX_ulp: Accuracy measurement</div>  </div>
    50. 

  50. <div class="ingroups"><a class="el" href="a00137.html">GTX Extensions (Experimental)</a></div></div>
    51. 

  51. <div class="contents">
    52. 

  52. <table class="memberdecls">
    53. 

  53. <tr><td colspan="2"><h2><a name="func-members"></a>
    54. 

  54. Functions</h2></td></tr>
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  55. <tr><td class="memTemplParams" colspan="2">template&lt;typename T &gt; </td></tr>
    56. 

  56. <tr><td class="memTemplItemLeft" align="right" valign="top">uint&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00207.html#ga0c49c371f6b2adf02d03661e0f2499c9">float_distance</a> (T const &amp;x, T const &amp;y)</td></tr>
    57. 

  57. <tr><td class="memTemplParams" colspan="2">template&lt;typename T , template&lt; typename &gt; class vecType&gt; </td></tr>
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  58. <tr><td class="memTemplItemLeft" align="right" valign="top">vecType&lt; uint &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00207.html#ga9b2de9eb54e59f20b20f7eccd40d435e">float_distance</a> (vecType&lt; T &gt; const &amp;x, vecType&lt; T &gt; const &amp;y)</td></tr>
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  59. <tr><td class="memTemplParams" colspan="2">template&lt;typename genType &gt; </td></tr>
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  60. <tr><td class="memTemplItemLeft" align="right" valign="top">genType&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00207.html#ga3be6de2d954fb457ff88085128e4b521">next_float</a> (genType const &amp;x)</td></tr>
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  61. <tr><td class="memTemplParams" colspan="2">template&lt;typename genType &gt; </td></tr>
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  62. <tr><td class="memTemplItemLeft" align="right" valign="top">genType&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00207.html#ga27752f3f7a9a79a50e95a9ed42800ca7">next_float</a> (genType const &amp;x, uint const &amp;Distance)</td></tr>
    63. 

  63. <tr><td class="memTemplParams" colspan="2">template&lt;typename genType &gt; </td></tr>
    64. 

  64. <tr><td class="memTemplItemLeft" align="right" valign="top">genType&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00207.html#ga2a0122b31c643ca1546635fe8e4f9f74">prev_float</a> (genType const &amp;x)</td></tr>
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  65. <tr><td class="memTemplParams" colspan="2">template&lt;typename genType &gt; </td></tr>
    66. 

  66. <tr><td class="memTemplItemLeft" align="right" valign="top">genType&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00207.html#gae506d2fb08aff01e00763d7ed76fe117">prev_float</a> (genType const &amp;x, uint const &amp;Distance)</td></tr>
    67. 

  67. </table>
    68. 

  68. <hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
    69. 

  69. <p>Allow the measurement of the accuracy of a function against a reference implementation. </p>
    70. 

  70. <p>This extension works on floating-point data and provide results in ULP. &lt;<a class="el" href="a00115.html" title="OpenGL Mathematics (glm.g-truc.net)">glm/gtx/ulp.hpp</a>&gt; need to be included to use these functionalities. </p>
    71. 

  71. <hr/><h2>Function Documentation</h2>
    72. 

  72. <a class="anchor" id="ga0c49c371f6b2adf02d03661e0f2499c9"></a><!-- doxytag: member="glm::float_distance" ref="ga0c49c371f6b2adf02d03661e0f2499c9" args="(T const &amp;x, T const &amp;y)" -->
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  73. <div class="memitem">
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  74. <div class="memproto">
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  76.         <tr>
    77. 

  77.           <td class="memname">uint glm::float_distance </td>
    78. 

  78.           <td>(</td>
    79. 

  79.           <td class="paramtype">T const &amp;&#160;</td>
    80. 

  80.           <td class="paramname"><em>x</em>, </td>
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  81.         </tr>
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  82.         <tr>
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  83.           <td class="paramkey"></td>
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  84.           <td></td>
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  85.           <td class="paramtype">T const &amp;&#160;</td>
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  86.           <td class="paramname"><em>y</em>&#160;</td>
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  88.         <tr>
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  89.           <td></td>
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  90.           <td>)</td>
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  94. </div>
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  95. <div class="memdoc">
    96. 

  96. 

  97. <p>Return the distance in the number of ULP between 2 scalars. </p>
    98. 

  98. <p>From GLM_GTX_ulp extension. </p>
    99. 

  99. 

  100. </div>
    101. 

  101. </div>
    102. 

  102. <a class="anchor" id="ga9b2de9eb54e59f20b20f7eccd40d435e"></a><!-- doxytag: member="glm::float_distance" ref="ga9b2de9eb54e59f20b20f7eccd40d435e" args="(vecType&lt; T &gt; const &amp;x, vecType&lt; T &gt; const &amp;y)" -->
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  107.           <td class="memname">vecType&lt;uint&gt; glm::float_distance </td>
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  108.           <td>(</td>
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  109.           <td class="paramtype">vecType&lt; T &gt; const &amp;&#160;</td>
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  110.           <td class="paramname"><em>x</em>, </td>
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  113.           <td class="paramkey"></td>
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  117.         </tr>
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  124. </div>
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  125. <div class="memdoc">
    126. 

  126. 

  127. <p>Return the distance in the number of ULP between 2 vectors. </p>
    128. 

  128. <p>From GLM_GTX_ulp extension. </p>
    129. 

  129. 

  130. </div>
    131. 

  131. </div>
    132. 

  132. <a class="anchor" id="ga3be6de2d954fb457ff88085128e4b521"></a><!-- doxytag: member="glm::next_float" ref="ga3be6de2d954fb457ff88085128e4b521" args="(genType const &amp;x)" -->
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  138.           <td>(</td>
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  141.           <td></td>
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  142.         </tr>
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  143.       </table>
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  144. </div>
    145. 

  145. <div class="memdoc">
    146. 

  146. 

  147. <p>Return the next ULP value(s) after the input value(s). </p>
    148. 

  148. <p>From GLM_GTX_ulp extension. </p>
    149. 

  149. 

  150. </div>
    151. 

  151. </div>
    152. 

  152. <a class="anchor" id="ga27752f3f7a9a79a50e95a9ed42800ca7"></a><!-- doxytag: member="glm::next_float" ref="ga27752f3f7a9a79a50e95a9ed42800ca7" args="(genType const &amp;x, uint const &amp;Distance)" -->
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  153. <div class="memitem">
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  154. <div class="memproto">
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  155.       <table class="memname">
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  156.         <tr>
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  157.           <td class="memname">genType glm::next_float </td>
    158. 

  158.           <td>(</td>
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  159.           <td class="paramtype">genType const &amp;&#160;</td>
    160. 

  160.           <td class="paramname"><em>x</em>, </td>
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  161.         </tr>
    162. 

  162.         <tr>
    163. 

  163.           <td class="paramkey"></td>
    164. 

  164.           <td></td>
    165. 

  165.           <td class="paramtype">uint const &amp;&#160;</td>
    166. 

  166.           <td class="paramname"><em>Distance</em>&#160;</td>
    167. 

  167.         </tr>
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  168.         <tr>
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  169.           <td></td>
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  170.           <td>)</td>
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  175. <div class="memdoc">
    176. 

  176. 

  177. <p>Return the value(s) ULP distance after the input value(s). </p>
    178. 

  178. <p>From GLM_GTX_ulp extension. </p>
    179. 

  179. 

  180. </div>
    181. 

  181. </div>
    182. 

  182. <a class="anchor" id="ga2a0122b31c643ca1546635fe8e4f9f74"></a><!-- doxytag: member="glm::prev_float" ref="ga2a0122b31c643ca1546635fe8e4f9f74" args="(genType const &amp;x)" -->
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  187.           <td class="memname">genType glm::prev_float </td>
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  188.           <td>(</td>
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  191.           <td></td>
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  193.       </table>
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  195. <div class="memdoc">
    196. 

  196. 

  197. <p>Return the previous ULP value(s) before the input value(s). </p>
    198. 

  198. <p>From GLM_GTX_ulp extension. </p>
    199. 

  199. 

  200. </div>
    201. 

  201. </div>
    202. 

  202. <a class="anchor" id="gae506d2fb08aff01e00763d7ed76fe117"></a><!-- doxytag: member="glm::prev_float" ref="gae506d2fb08aff01e00763d7ed76fe117" args="(genType const &amp;x, uint const &amp;Distance)" -->
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  203. <div class="memitem">
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  204. <div class="memproto">
    205. 

  205.       <table class="memname">
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  206.         <tr>
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  207.           <td class="memname">genType glm::prev_float </td>
    208. 

  208.           <td>(</td>
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  209.           <td class="paramtype">genType const &amp;&#160;</td>
    210. 

  210.           <td class="paramname"><em>x</em>, </td>
    211. 

  211.         </tr>
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  212.         <tr>
    213. 

  213.           <td class="paramkey"></td>
    214. 

  214.           <td></td>
    215. 

  215.           <td class="paramtype">uint const &amp;&#160;</td>
    216. 

  216.           <td class="paramname"><em>Distance</em>&#160;</td>
    217. 

  217.         </tr>
    218. 

  218.         <tr>
    219. 

  219.           <td></td>
    220. 

  220.           <td>)</td>
    221. 

  221.           <td></td><td></td>
    222. 

  222.         </tr>
    223. 

  223.       </table>
    224. 

  224. </div>
    225. 

  225. <div class="memdoc">
    226. 

  226. 

  227. <p>Return the value(s) ULP distance before the input value(s). </p>
    228. 

  228. <p>From GLM_GTX_ulp extension. </p>
    229. 

  229. 

  230. </div>
    231. 

  231. </div>
    232. 

  232. </div>
    233. 

  233. 

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    237. 

  237. <img class="footer" src="doxygen.png" alt="doxygen"/>
    238. 

  238. </a> 1.7.5.1
    239. 

  239. </small></address>
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  240. 

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