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    66. 

  66. <a href="#func-members">Functions</a>  </div>
    67. 

  67.   <div class="headertitle">
    68. 

  68. <div class="title">Geometric functions<div class="ingroups"><a class="el" href="a00898.html">Core features</a></div></div>  </div>
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  69. </div><!--header-->
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  70. <div class="contents">
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  71. <table class="memberdecls">
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  72. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
    73. 

  73. Functions</h2></td></tr>
    74. 

  74. <tr class="memitem:gaefe60743d7f415a33cbdddbe3bcf0258"><td class="memTemplParams" colspan="2">template&lt;typename T , qualifier Q&gt; </td></tr>
    75. 

  75. <tr class="memitem:gaefe60743d7f415a33cbdddbe3bcf0258"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL GLM_CONSTEXPR vec&lt; 3, T, Q &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00897.html#gaefe60743d7f415a33cbdddbe3bcf0258">cross</a> (vec&lt; 3, T, Q &gt; const &amp;x, vec&lt; 3, T, Q &gt; const &amp;y)</td></tr>
    76. 

  76. <tr class="memdesc:gaefe60743d7f415a33cbdddbe3bcf0258"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the cross product of x and y.  <a href="a00897.html#gaefe60743d7f415a33cbdddbe3bcf0258">More...</a><br /></td></tr>
    77. 

  77. <tr class="separator:gaefe60743d7f415a33cbdddbe3bcf0258"><td class="memSeparator" colspan="2">&#160;</td></tr>
    78. 

  78. <tr class="memitem:gaa68de6c53e20dfb2dac2d20197562e3f"><td class="memTemplParams" colspan="2">template&lt;length_t L, typename T , qualifier Q&gt; </td></tr>
    79. 

  79. <tr class="memitem:gaa68de6c53e20dfb2dac2d20197562e3f"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL T&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00897.html#gaa68de6c53e20dfb2dac2d20197562e3f">distance</a> (vec&lt; L, T, Q &gt; const &amp;p0, vec&lt; L, T, Q &gt; const &amp;p1)</td></tr>
    80. 

  80. <tr class="memdesc:gaa68de6c53e20dfb2dac2d20197562e3f"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the distance between p0 and p1, i.e., length(p0 - p1).  <a href="a00897.html#gaa68de6c53e20dfb2dac2d20197562e3f">More...</a><br /></td></tr>
    81. 

  81. <tr class="separator:gaa68de6c53e20dfb2dac2d20197562e3f"><td class="memSeparator" colspan="2">&#160;</td></tr>
    82. 

  82. <tr class="memitem:gaec50c25dd3b13834af0bf6fd2ce3931c"><td class="memTemplParams" colspan="2">template&lt;length_t L, typename T , qualifier Q&gt; </td></tr>
    83. 

  83. <tr class="memitem:gaec50c25dd3b13834af0bf6fd2ce3931c"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL GLM_CONSTEXPR T&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00897.html#gaec50c25dd3b13834af0bf6fd2ce3931c">dot</a> (vec&lt; L, T, Q &gt; const &amp;x, vec&lt; L, T, Q &gt; const &amp;y)</td></tr>
    84. 

  84. <tr class="memdesc:gaec50c25dd3b13834af0bf6fd2ce3931c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the dot product of x and y, i.e., result = x * y.  <a href="a00897.html#gaec50c25dd3b13834af0bf6fd2ce3931c">More...</a><br /></td></tr>
    85. 

  85. <tr class="separator:gaec50c25dd3b13834af0bf6fd2ce3931c"><td class="memSeparator" colspan="2">&#160;</td></tr>
    86. 

  86. <tr class="memitem:ga7aed0a36c738169402404a3a5d54e43b"><td class="memTemplParams" colspan="2">template&lt;length_t L, typename T , qualifier Q&gt; </td></tr>
    87. 

  87. <tr class="memitem:ga7aed0a36c738169402404a3a5d54e43b"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL vec&lt; L, T, Q &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00897.html#ga7aed0a36c738169402404a3a5d54e43b">faceforward</a> (vec&lt; L, T, Q &gt; const &amp;N, vec&lt; L, T, Q &gt; const &amp;I, vec&lt; L, T, Q &gt; const &amp;Nref)</td></tr>
    88. 

  88. <tr class="memdesc:ga7aed0a36c738169402404a3a5d54e43b"><td class="mdescLeft">&#160;</td><td class="mdescRight">If dot(Nref, I) &lt; 0.0, return N, otherwise, return -N.  <a href="a00897.html#ga7aed0a36c738169402404a3a5d54e43b">More...</a><br /></td></tr>
    89. 

  89. <tr class="separator:ga7aed0a36c738169402404a3a5d54e43b"><td class="memSeparator" colspan="2">&#160;</td></tr>
    90. 

  90. <tr class="memitem:ga0cdabbb000834d994a1d6dc56f8f5263"><td class="memTemplParams" colspan="2">template&lt;length_t L, typename T , qualifier Q&gt; </td></tr>
    91. 

  91. <tr class="memitem:ga0cdabbb000834d994a1d6dc56f8f5263"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL T&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00897.html#ga0cdabbb000834d994a1d6dc56f8f5263">length</a> (vec&lt; L, T, Q &gt; const &amp;x)</td></tr>
    92. 

  92. <tr class="memdesc:ga0cdabbb000834d994a1d6dc56f8f5263"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the length of x, i.e., sqrt(x * x).  <a href="a00897.html#ga0cdabbb000834d994a1d6dc56f8f5263">More...</a><br /></td></tr>
    93. 

  93. <tr class="separator:ga0cdabbb000834d994a1d6dc56f8f5263"><td class="memSeparator" colspan="2">&#160;</td></tr>
    94. 

  94. <tr class="memitem:ga3b8d3dcae77870781392ed2902cce597"><td class="memTemplParams" colspan="2">template&lt;length_t L, typename T , qualifier Q&gt; </td></tr>
    95. 

  95. <tr class="memitem:ga3b8d3dcae77870781392ed2902cce597"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL vec&lt; L, T, Q &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00897.html#ga3b8d3dcae77870781392ed2902cce597">normalize</a> (vec&lt; L, T, Q &gt; const &amp;x)</td></tr>
    96. 

  96. <tr class="memdesc:ga3b8d3dcae77870781392ed2902cce597"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns a vector in the same direction as x but with length of 1.  <a href="a00897.html#ga3b8d3dcae77870781392ed2902cce597">More...</a><br /></td></tr>
    97. 

  97. <tr class="separator:ga3b8d3dcae77870781392ed2902cce597"><td class="memSeparator" colspan="2">&#160;</td></tr>
    98. 

  98. <tr class="memitem:ga5631dd1d5618de5450b1ea3cf3e94905"><td class="memTemplParams" colspan="2">template&lt;length_t L, typename T , qualifier Q&gt; </td></tr>
    99. 

  99. <tr class="memitem:ga5631dd1d5618de5450b1ea3cf3e94905"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL vec&lt; L, T, Q &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00897.html#ga5631dd1d5618de5450b1ea3cf3e94905">reflect</a> (vec&lt; L, T, Q &gt; const &amp;I, vec&lt; L, T, Q &gt; const &amp;N)</td></tr>
    100. 

  100. <tr class="memdesc:ga5631dd1d5618de5450b1ea3cf3e94905"><td class="mdescLeft">&#160;</td><td class="mdescRight">For the incident vector I and surface orientation N, returns the reflection direction : result = I - 2.0 * dot(N, I) * N.  <a href="a00897.html#ga5631dd1d5618de5450b1ea3cf3e94905">More...</a><br /></td></tr>
    101. 

  101. <tr class="separator:ga5631dd1d5618de5450b1ea3cf3e94905"><td class="memSeparator" colspan="2">&#160;</td></tr>
    102. 

  102. <tr class="memitem:ga01da3dff9e2ef6b9d4915c3047e22b74"><td class="memTemplParams" colspan="2">template&lt;length_t L, typename T , qualifier Q&gt; </td></tr>
    103. 

  103. <tr class="memitem:ga01da3dff9e2ef6b9d4915c3047e22b74"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL vec&lt; L, T, Q &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00897.html#ga01da3dff9e2ef6b9d4915c3047e22b74">refract</a> (vec&lt; L, T, Q &gt; const &amp;I, vec&lt; L, T, Q &gt; const &amp;N, T eta)</td></tr>
    104. 

  104. <tr class="memdesc:ga01da3dff9e2ef6b9d4915c3047e22b74"><td class="mdescLeft">&#160;</td><td class="mdescRight">For the incident vector I and surface normal N, and the ratio of indices of refraction eta, return the refraction vector.  <a href="a00897.html#ga01da3dff9e2ef6b9d4915c3047e22b74">More...</a><br /></td></tr>
    105. 

  105. <tr class="separator:ga01da3dff9e2ef6b9d4915c3047e22b74"><td class="memSeparator" colspan="2">&#160;</td></tr>
    106. 

  106. </table>
    107. 

  107. <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
    108. 

  108. <p>These operate on vectors as vectors, not component-wise.</p>
    109. 

  109. <p>Include &lt;<a class="el" href="a00527.html" title="Core features">glm/geometric.hpp</a>&gt; to use these core features. </p>
    110. 

  110. <h2 class="groupheader">Function Documentation</h2>
    111. 

  111. <a id="gaefe60743d7f415a33cbdddbe3bcf0258"></a>
    112. 

  112. <h2 class="memtitle"><span class="permalink"><a href="#gaefe60743d7f415a33cbdddbe3bcf0258">&#9670;&nbsp;</a></span>cross()</h2>
    113. 

  113. 

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

  115. <div class="memproto">
    116. 

  116.       <table class="memname">
    117. 

  117.         <tr>
    118. 

  118.           <td class="memname">GLM_FUNC_DECL GLM_CONSTEXPR vec&lt;3, T, Q&gt; glm::cross </td>
    119. 

  119.           <td>(</td>
    120. 

  120.           <td class="paramtype">vec&lt; 3, T, Q &gt; const &amp;&#160;</td>
    121. 

  121.           <td class="paramname"><em>x</em>, </td>
    122. 

  122.         </tr>
    123. 

  123.         <tr>
    124. 

  124.           <td class="paramkey"></td>
    125. 

  125.           <td></td>
    126. 

  126.           <td class="paramtype">vec&lt; 3, T, Q &gt; const &amp;&#160;</td>
    127. 

  127.           <td class="paramname"><em>y</em>&#160;</td>
    128. 

  128.         </tr>
    129. 

  129.         <tr>
    130. 

  130.           <td></td>
    131. 

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

  132.           <td></td><td></td>
    133. 

  133.         </tr>
    134. 

  134.       </table>
    135. 

  135. </div><div class="memdoc">
    136. 

  136. 

  137. <p>Returns the cross product of x and y. </p>
    138. 

  138. <dl class="tparams"><dt>Template Parameters</dt><dd>
    139. 

  139.   <table class="tparams">
    140. 

  140.     <tr><td class="paramname">T</td><td>Floating-point scalar types.</td></tr>
    141. 

  141.   </table>
    142. 

  142.   </dd>
    143. 

  143. </dl>
    144. 

  144. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/cross.xml">GLSL cross man page</a> </dd>
    145. 

  145. <dd>
    146. 

  146. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.5 Geometric Functions</a> </dd></dl>
    147. 

  147. 

  148. </div>
    149. 

  149. </div>
    150. 

  150. <a id="gaa68de6c53e20dfb2dac2d20197562e3f"></a>
    151. 

  151. <h2 class="memtitle"><span class="permalink"><a href="#gaa68de6c53e20dfb2dac2d20197562e3f">&#9670;&nbsp;</a></span>distance()</h2>
    152. 

  152. 

  153. <div class="memitem">
    154. 

  154. <div class="memproto">
    155. 

  155.       <table class="memname">
    156. 

  156.         <tr>
    157. 

  157.           <td class="memname">GLM_FUNC_DECL T glm::distance </td>
    158. 

  158.           <td>(</td>
    159. 

  159.           <td class="paramtype">vec&lt; L, T, Q &gt; const &amp;&#160;</td>
    160. 

  160.           <td class="paramname"><em>p0</em>, </td>
    161. 

  161.         </tr>
    162. 

  162.         <tr>
    163. 

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

  164.           <td></td>
    165. 

  165.           <td class="paramtype">vec&lt; L, T, Q &gt; const &amp;&#160;</td>
    166. 

  166.           <td class="paramname"><em>p1</em>&#160;</td>
    167. 

  167.         </tr>
    168. 

  168.         <tr>
    169. 

  169.           <td></td>
    170. 

  170.           <td>)</td>
    171. 

  171.           <td></td><td></td>
    172. 

  172.         </tr>
    173. 

  173.       </table>
    174. 

  174. </div><div class="memdoc">
    175. 

  175. 

  176. <p>Returns the distance between p0 and p1, i.e., length(p0 - p1). </p>
    177. 

  177. <dl class="tparams"><dt>Template Parameters</dt><dd>
    178. 

  178.   <table class="tparams">
    179. 

  179.     <tr><td class="paramname">L</td><td>An integer between 1 and 4 included that qualify the dimension of the vector. </td></tr>
    180. 

  180.     <tr><td class="paramname">T</td><td>Floating-point scalar types.</td></tr>
    181. 

  181.   </table>
    182. 

  182.   </dd>
    183. 

  183. </dl>
    184. 

  184. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/distance.xml">GLSL distance man page</a> </dd>
    185. 

  185. <dd>
    186. 

  186. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.5 Geometric Functions</a> </dd></dl>
    187. 

  187. 

  188. </div>
    189. 

  189. </div>
    190. 

  190. <a id="gaec50c25dd3b13834af0bf6fd2ce3931c"></a>
    191. 

  191. <h2 class="memtitle"><span class="permalink"><a href="#gaec50c25dd3b13834af0bf6fd2ce3931c">&#9670;&nbsp;</a></span>dot()</h2>
    192. 

  192. 

  193. <div class="memitem">
    194. 

  194. <div class="memproto">
    195. 

  195.       <table class="memname">
    196. 

  196.         <tr>
    197. 

  197.           <td class="memname">GLM_FUNC_DECL GLM_CONSTEXPR T glm::dot </td>
    198. 

  198.           <td>(</td>
    199. 

  199.           <td class="paramtype">vec&lt; L, T, Q &gt; const &amp;&#160;</td>
    200. 

  200.           <td class="paramname"><em>x</em>, </td>
    201. 

  201.         </tr>
    202. 

  202.         <tr>
    203. 

  203.           <td class="paramkey"></td>
    204. 

  204.           <td></td>
    205. 

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

  206.           <td class="paramname"><em>y</em>&#160;</td>
    207. 

  207.         </tr>
    208. 

  208.         <tr>
    209. 

  209.           <td></td>
    210. 

  210.           <td>)</td>
    211. 

  211.           <td></td><td></td>
    212. 

  212.         </tr>
    213. 

  213.       </table>
    214. 

  214. </div><div class="memdoc">
    215. 

  215. 

  216. <p>Returns the dot product of x and y, i.e., result = x * y. </p>
    217. 

  217. <dl class="tparams"><dt>Template Parameters</dt><dd>
    218. 

  218.   <table class="tparams">
    219. 

  219.     <tr><td class="paramname">L</td><td>An integer between 1 and 4 included that qualify the dimension of the vector. </td></tr>
    220. 

  220.     <tr><td class="paramname">T</td><td>Floating-point scalar types.</td></tr>
    221. 

  221.   </table>
    222. 

  222.   </dd>
    223. 

  223. </dl>
    224. 

  224. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/dot.xml">GLSL dot man page</a> </dd>
    225. 

  225. <dd>
    226. 

  226. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.5 Geometric Functions</a> </dd></dl>
    227. 

  227. 

  228. </div>
    229. 

  229. </div>
    230. 

  230. <a id="ga7aed0a36c738169402404a3a5d54e43b"></a>
    231. 

  231. <h2 class="memtitle"><span class="permalink"><a href="#ga7aed0a36c738169402404a3a5d54e43b">&#9670;&nbsp;</a></span>faceforward()</h2>
    232. 

  232. 

  233. <div class="memitem">
    234. 

  234. <div class="memproto">
    235. 

  235.       <table class="memname">
    236. 

  236.         <tr>
    237. 

  237.           <td class="memname">GLM_FUNC_DECL vec&lt;L, T, Q&gt; glm::faceforward </td>
    238. 

  238.           <td>(</td>
    239. 

  239.           <td class="paramtype">vec&lt; L, T, Q &gt; const &amp;&#160;</td>
    240. 

  240.           <td class="paramname"><em>N</em>, </td>
    241. 

  241.         </tr>
    242. 

  242.         <tr>
    243. 

  243.           <td class="paramkey"></td>
    244. 

  244.           <td></td>
    245. 

  245.           <td class="paramtype">vec&lt; L, T, Q &gt; const &amp;&#160;</td>
    246. 

  246.           <td class="paramname"><em>I</em>, </td>
    247. 

  247.         </tr>
    248. 

  248.         <tr>
    249. 

  249.           <td class="paramkey"></td>
    250. 

  250.           <td></td>
    251. 

  251.           <td class="paramtype">vec&lt; L, T, Q &gt; const &amp;&#160;</td>
    252. 

  252.           <td class="paramname"><em>Nref</em>&#160;</td>
    253. 

  253.         </tr>
    254. 

  254.         <tr>
    255. 

  255.           <td></td>
    256. 

  256.           <td>)</td>
    257. 

  257.           <td></td><td></td>
    258. 

  258.         </tr>
    259. 

  259.       </table>
    260. 

  260. </div><div class="memdoc">
    261. 

  261. 

  262. <p>If dot(Nref, I) &lt; 0.0, return N, otherwise, return -N. </p>
    263. 

  263. <dl class="tparams"><dt>Template Parameters</dt><dd>
    264. 

  264.   <table class="tparams">
    265. 

  265.     <tr><td class="paramname">L</td><td>An integer between 1 and 4 included that qualify the dimension of the vector. </td></tr>
    266. 

  266.     <tr><td class="paramname">T</td><td>Floating-point scalar types.</td></tr>
    267. 

  267.   </table>
    268. 

  268.   </dd>
    269. 

  269. </dl>
    270. 

  270. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/faceforward.xml">GLSL faceforward man page</a> </dd>
    271. 

  271. <dd>
    272. 

  272. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.5 Geometric Functions</a> </dd></dl>
    273. 

  273. 

  274. </div>
    275. 

  275. </div>
    276. 

  276. <a id="ga0cdabbb000834d994a1d6dc56f8f5263"></a>
    277. 

  277. <h2 class="memtitle"><span class="permalink"><a href="#ga0cdabbb000834d994a1d6dc56f8f5263">&#9670;&nbsp;</a></span>length()</h2>
    278. 

  278. 

  279. <div class="memitem">
    280. 

  280. <div class="memproto">
    281. 

  281.       <table class="memname">
    282. 

  282.         <tr>
    283. 

  283.           <td class="memname">GLM_FUNC_DECL T glm::length </td>
    284. 

  284.           <td>(</td>
    285. 

  285.           <td class="paramtype">vec&lt; L, T, Q &gt; const &amp;&#160;</td>
    286. 

  286.           <td class="paramname"><em>x</em></td><td>)</td>
    287. 

  287.           <td></td>
    288. 

  288.         </tr>
    289. 

  289.       </table>
    290. 

  290. </div><div class="memdoc">
    291. 

  291. 

  292. <p>Returns the length of x, i.e., sqrt(x * x). </p>
    293. 

  293. <dl class="tparams"><dt>Template Parameters</dt><dd>
    294. 

  294.   <table class="tparams">
    295. 

  295.     <tr><td class="paramname">L</td><td>An integer between 1 and 4 included that qualify the dimension of the vector. </td></tr>
    296. 

  296.     <tr><td class="paramname">T</td><td>Floating-point scalar types.</td></tr>
    297. 

  297.   </table>
    298. 

  298.   </dd>
    299. 

  299. </dl>
    300. 

  300. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/length.xml">GLSL length man page</a> </dd>
    301. 

  301. <dd>
    302. 

  302. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.5 Geometric Functions</a> </dd></dl>
    303. 

  303. 

  304. </div>
    305. 

  305. </div>
    306. 

  306. <a id="ga3b8d3dcae77870781392ed2902cce597"></a>
    307. 

  307. <h2 class="memtitle"><span class="permalink"><a href="#ga3b8d3dcae77870781392ed2902cce597">&#9670;&nbsp;</a></span>normalize()</h2>
    308. 

  308. 

  309. <div class="memitem">
    310. 

  310. <div class="memproto">
    311. 

  311.       <table class="memname">
    312. 

  312.         <tr>
    313. 

  313.           <td class="memname">GLM_FUNC_DECL vec&lt;L, T, Q&gt; glm::normalize </td>
    314. 

  314.           <td>(</td>
    315. 

  315.           <td class="paramtype">vec&lt; L, T, Q &gt; const &amp;&#160;</td>
    316. 

  316.           <td class="paramname"><em>x</em></td><td>)</td>
    317. 

  317.           <td></td>
    318. 

  318.         </tr>
    319. 

  319.       </table>
    320. 

  320. </div><div class="memdoc">
    321. 

  321. 

  322. <p>Returns a vector in the same direction as x but with length of 1. </p>
    323. 

  323. <p>According to issue 10 GLSL 1.10 specification, if length(x) == 0 then result is undefined and generate an error.</p>
    324. 

  324. <dl class="tparams"><dt>Template Parameters</dt><dd>
    325. 

  325.   <table class="tparams">
    326. 

  326.     <tr><td class="paramname">L</td><td>An integer between 1 and 4 included that qualify the dimension of the vector. </td></tr>
    327. 

  327.     <tr><td class="paramname">T</td><td>Floating-point scalar types.</td></tr>
    328. 

  328.   </table>
    329. 

  329.   </dd>
    330. 

  330. </dl>
    331. 

  331. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/normalize.xml">GLSL normalize man page</a> </dd>
    332. 

  332. <dd>
    333. 

  333. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.5 Geometric Functions</a> </dd></dl>
    334. 

  334. 

  335. </div>
    336. 

  336. </div>
    337. 

  337. <a id="ga5631dd1d5618de5450b1ea3cf3e94905"></a>
    338. 

  338. <h2 class="memtitle"><span class="permalink"><a href="#ga5631dd1d5618de5450b1ea3cf3e94905">&#9670;&nbsp;</a></span>reflect()</h2>
    339. 

  339. 

  340. <div class="memitem">
    341. 

  341. <div class="memproto">
    342. 

  342.       <table class="memname">
    343. 

  343.         <tr>
    344. 

  344.           <td class="memname">GLM_FUNC_DECL vec&lt;L, T, Q&gt; glm::reflect </td>
    345. 

  345.           <td>(</td>
    346. 

  346.           <td class="paramtype">vec&lt; L, T, Q &gt; const &amp;&#160;</td>
    347. 

  347.           <td class="paramname"><em>I</em>, </td>
    348. 

  348.         </tr>
    349. 

  349.         <tr>
    350. 

  350.           <td class="paramkey"></td>
    351. 

  351.           <td></td>
    352. 

  352.           <td class="paramtype">vec&lt; L, T, Q &gt; const &amp;&#160;</td>
    353. 

  353.           <td class="paramname"><em>N</em>&#160;</td>
    354. 

  354.         </tr>
    355. 

  355.         <tr>
    356. 

  356.           <td></td>
    357. 

  357.           <td>)</td>
    358. 

  358.           <td></td><td></td>
    359. 

  359.         </tr>
    360. 

  360.       </table>
    361. 

  361. </div><div class="memdoc">
    362. 

  362. 

  363. <p>For the incident vector I and surface orientation N, returns the reflection direction : result = I - 2.0 * dot(N, I) * N. </p>
    364. 

  364. <dl class="tparams"><dt>Template Parameters</dt><dd>
    365. 

  365.   <table class="tparams">
    366. 

  366.     <tr><td class="paramname">L</td><td>An integer between 1 and 4 included that qualify the dimension of the vector. </td></tr>
    367. 

  367.     <tr><td class="paramname">T</td><td>Floating-point scalar types.</td></tr>
    368. 

  368.   </table>
    369. 

  369.   </dd>
    370. 

  370. </dl>
    371. 

  371. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/reflect.xml">GLSL reflect man page</a> </dd>
    372. 

  372. <dd>
    373. 

  373. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.5 Geometric Functions</a> </dd></dl>
    374. 

  374. 

  375. </div>
    376. 

  376. </div>
    377. 

  377. <a id="ga01da3dff9e2ef6b9d4915c3047e22b74"></a>
    378. 

  378. <h2 class="memtitle"><span class="permalink"><a href="#ga01da3dff9e2ef6b9d4915c3047e22b74">&#9670;&nbsp;</a></span>refract()</h2>
    379. 

  379. 

  380. <div class="memitem">
    381. 

  381. <div class="memproto">
    382. 

  382.       <table class="memname">
    383. 

  383.         <tr>
    384. 

  384.           <td class="memname">GLM_FUNC_DECL vec&lt;L, T, Q&gt; glm::refract </td>
    385. 

  385.           <td>(</td>
    386. 

  386.           <td class="paramtype">vec&lt; L, T, Q &gt; const &amp;&#160;</td>
    387. 

  387.           <td class="paramname"><em>I</em>, </td>
    388. 

  388.         </tr>
    389. 

  389.         <tr>
    390. 

  390.           <td class="paramkey"></td>
    391. 

  391.           <td></td>
    392. 

  392.           <td class="paramtype">vec&lt; L, T, Q &gt; const &amp;&#160;</td>
    393. 

  393.           <td class="paramname"><em>N</em>, </td>
    394. 

  394.         </tr>
    395. 

  395.         <tr>
    396. 

  396.           <td class="paramkey"></td>
    397. 

  397.           <td></td>
    398. 

  398.           <td class="paramtype">T&#160;</td>
    399. 

  399.           <td class="paramname"><em>eta</em>&#160;</td>
    400. 

  400.         </tr>
    401. 

  401.         <tr>
    402. 

  402.           <td></td>
    403. 

  403.           <td>)</td>
    404. 

  404.           <td></td><td></td>
    405. 

  405.         </tr>
    406. 

  406.       </table>
    407. 

  407. </div><div class="memdoc">
    408. 

  408. 

  409. <p>For the incident vector I and surface normal N, and the ratio of indices of refraction eta, return the refraction vector. </p>
    410. 

  410. <dl class="tparams"><dt>Template Parameters</dt><dd>
    411. 

  411.   <table class="tparams">
    412. 

  412.     <tr><td class="paramname">L</td><td>An integer between 1 and 4 included that qualify the dimension of the vector. </td></tr>
    413. 

  413.     <tr><td class="paramname">T</td><td>Floating-point scalar types.</td></tr>
    414. 

  414.   </table>
    415. 

  415.   </dd>
    416. 

  416. </dl>
    417. 

  417. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/refract.xml">GLSL refract man page</a> </dd>
    418. 

  418. <dd>
    419. 

  419. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.5 Geometric Functions</a> </dd></dl>
    420. 

  420. 

  421. </div>
    422. 

  422. </div>
    423. 

  423. </div><!-- contents -->
    424. 

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    425. 

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    426. 

  426. Generated by &#160;<a href="http://www.doxygen.org/index.html">
    427. 

  427. <img class="footer" src="doxygen.png" alt="doxygen"/>
    428. 

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    429. 

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    430. 

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    432.