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  40. <a href="#func-members">Functions</a>  </div>
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  42. <div class="title">Floating-Point Pack and Unpack Functions<div class="ingroups"><a class="el" href="a00160.html">GLM Core</a></div></div>  </div>
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  46. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
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  47. Functions</h2></td></tr>
    48. 

  48. <tr class="memitem:gaa916ca426b2bb0343ba17e3753e245c2"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00155.html#gaa916ca426b2bb0343ba17e3753e245c2">packDouble2x32</a> (uvec2 const &amp;v)</td></tr>
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  50. <tr class="memitem:ga20f134b07db3a3d3a38efb2617388c92"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL uint&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00155.html#ga20f134b07db3a3d3a38efb2617388c92">packHalf2x16</a> (vec2 const &amp;v)</td></tr>
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  52. <tr class="memitem:ga977ab172da5494e5ac63e952afacfbe2"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL uint&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00155.html#ga977ab172da5494e5ac63e952afacfbe2">packSnorm2x16</a> (vec2 const &amp;v)</td></tr>
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  54. <tr class="memitem:ga85e8f17627516445026ab7a9c2e3531a"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL uint&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00155.html#ga85e8f17627516445026ab7a9c2e3531a">packSnorm4x8</a> (vec4 const &amp;v)</td></tr>
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  56. <tr class="memitem:ga0e2d107039fe608a209497af867b85fb"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL uint&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00155.html#ga0e2d107039fe608a209497af867b85fb">packUnorm2x16</a> (vec2 const &amp;v)</td></tr>
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  58. <tr class="memitem:gaf7d2f7341a9eeb4a436929d6f9ad08f2"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL uint&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00155.html#gaf7d2f7341a9eeb4a436929d6f9ad08f2">packUnorm4x8</a> (vec4 const &amp;v)</td></tr>
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  59. <tr class="separator:gaf7d2f7341a9eeb4a436929d6f9ad08f2"><td class="memSeparator" colspan="2">&#160;</td></tr>
    60. 

  60. <tr class="memitem:gaafb099c61f00a002d975a5b67e1e8eb1"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL uvec2&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00155.html#gaafb099c61f00a002d975a5b67e1e8eb1">unpackDouble2x32</a> (double const &amp;v)</td></tr>
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  61. <tr class="separator:gaafb099c61f00a002d975a5b67e1e8eb1"><td class="memSeparator" colspan="2">&#160;</td></tr>
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  62. <tr class="memitem:ga8d431ee6df169088a08f4464976925d9"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL vec2&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00155.html#ga8d431ee6df169088a08f4464976925d9">unpackHalf2x16</a> (uint const &amp;v)</td></tr>
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  64. <tr class="memitem:ga77a35a82ffa538f921379c362bbeb017"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL vec2&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00155.html#ga77a35a82ffa538f921379c362bbeb017">unpackSnorm2x16</a> (uint const &amp;p)</td></tr>
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  65. <tr class="separator:ga77a35a82ffa538f921379c362bbeb017"><td class="memSeparator" colspan="2">&#160;</td></tr>
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  66. <tr class="memitem:ga0ae75b1ab2ff410274fc0b7d8d5b6c7d"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL vec4&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00155.html#ga0ae75b1ab2ff410274fc0b7d8d5b6c7d">unpackSnorm4x8</a> (uint const &amp;p)</td></tr>
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  68. <tr class="memitem:ga7203eea0c2c897acddee6936c9bd5343"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL vec2&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00155.html#ga7203eea0c2c897acddee6936c9bd5343">unpackUnorm2x16</a> (uint const &amp;p)</td></tr>
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  69. <tr class="separator:ga7203eea0c2c897acddee6936c9bd5343"><td class="memSeparator" colspan="2">&#160;</td></tr>
    70. 

  70. <tr class="memitem:gaa2dee2a1ff4707d710d90c17985d0b40"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL vec4&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00155.html#gaa2dee2a1ff4707d710d90c17985d0b40">unpackUnorm4x8</a> (uint const &amp;p)</td></tr>
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  72. </table>
    73. 

  73. <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
    74. 

  74. <p>These functions do not operate component-wise, rather as described in each case. </p>
    75. 

  75. <h2 class="groupheader">Function Documentation</h2>
    76. 

  76. <a class="anchor" id="gaa916ca426b2bb0343ba17e3753e245c2"></a>
    77. 

  77. <div class="memitem">
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  78. <div class="memproto">
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  79.       <table class="memname">
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  80.         <tr>
    81. 

  81.           <td class="memname">GLM_FUNC_DECL double glm::packDouble2x32 </td>
    82. 

  82.           <td>(</td>
    83. 

  83.           <td class="paramtype">uvec2 const &amp;&#160;</td>
    84. 

  84.           <td class="paramname"><em>v</em></td><td>)</td>
    85. 

  85.           <td></td>
    86. 

  86.         </tr>
    87. 

  87.       </table>
    88. 

  88. </div><div class="memdoc">
    89. 

  89. 

  90. <p>Returns a double-precision value obtained by packing the components of v into a 64-bit value. </p>
    91. 

  91. <p>If an IEEE 754 Inf or NaN is created, it will not signal, and the resulting floating point value is unspecified. Otherwise, the bit- level representation of v is preserved. The first vector component specifies the 32 least significant bits; the second component specifies the 32 most significant bits.</p>
    92. 

  92. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/packDouble2x32.xml">GLSL packDouble2x32 man page</a> </dd>
    93. 

  93. <dd>
    94. 

  94. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions</a> </dd></dl>
    95. 

  95. 

  96. </div>
    97. 

  97. </div>
    98. 

  98. <a class="anchor" id="ga20f134b07db3a3d3a38efb2617388c92"></a>
    99. 

  99. <div class="memitem">
    100. 

  100. <div class="memproto">
    101. 

  101.       <table class="memname">
    102. 

  102.         <tr>
    103. 

  103.           <td class="memname">GLM_FUNC_DECL uint glm::packHalf2x16 </td>
    104. 

  104.           <td>(</td>
    105. 

  105.           <td class="paramtype">vec2 const &amp;&#160;</td>
    106. 

  106.           <td class="paramname"><em>v</em></td><td>)</td>
    107. 

  107.           <td></td>
    108. 

  108.         </tr>
    109. 

  109.       </table>
    110. 

  110. </div><div class="memdoc">
    111. 

  111. 

  112. <p>Returns an unsigned integer obtained by converting the components of a two-component floating-point vector to the 16-bit floating-point representation found in the OpenGL Specification, and then packing these two 16- bit integers into a 32-bit unsigned integer. </p>
    113. 

  113. <p>The first vector component specifies the 16 least-significant bits of the result; the second component specifies the 16 most-significant bits.</p>
    114. 

  114. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/packHalf2x16.xml">GLSL packHalf2x16 man page</a> </dd>
    115. 

  115. <dd>
    116. 

  116. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions</a> </dd></dl>
    117. 

  117. 

  118. </div>
    119. 

  119. </div>
    120. 

  120. <a class="anchor" id="ga977ab172da5494e5ac63e952afacfbe2"></a>
    121. 

  121. <div class="memitem">
    122. 

  122. <div class="memproto">
    123. 

  123.       <table class="memname">
    124. 

  124.         <tr>
    125. 

  125.           <td class="memname">GLM_FUNC_DECL uint glm::packSnorm2x16 </td>
    126. 

  126.           <td>(</td>
    127. 

  127.           <td class="paramtype">vec2 const &amp;&#160;</td>
    128. 

  128.           <td class="paramname"><em>v</em></td><td>)</td>
    129. 

  129.           <td></td>
    130. 

  130.         </tr>
    131. 

  131.       </table>
    132. 

  132. </div><div class="memdoc">
    133. 

  133. 

  134. <p>First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. </p>
    135. 

  135. <p>Then, the results are packed into the returned 32-bit unsigned integer.</p>
    136. 

  136. <p>The conversion for component c of v to fixed point is done as follows: packSnorm2x16: round(clamp(v, -1, +1) * 32767.0)</p>
    137. 

  137. <p>The first component of the vector will be written to the least significant bits of the output; the last component will be written to the most significant bits.</p>
    138. 

  138. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/packSnorm2x16.xml">GLSL packSnorm2x16 man page</a> </dd>
    139. 

  139. <dd>
    140. 

  140. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions</a> </dd></dl>
    141. 

  141. 

  142. </div>
    143. 

  143. </div>
    144. 

  144. <a class="anchor" id="ga85e8f17627516445026ab7a9c2e3531a"></a>
    145. 

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

  146. <div class="memproto">
    147. 

  147.       <table class="memname">
    148. 

  148.         <tr>
    149. 

  149.           <td class="memname">GLM_FUNC_DECL uint glm::packSnorm4x8 </td>
    150. 

  150.           <td>(</td>
    151. 

  151.           <td class="paramtype">vec4 const &amp;&#160;</td>
    152. 

  152.           <td class="paramname"><em>v</em></td><td>)</td>
    153. 

  153.           <td></td>
    154. 

  154.         </tr>
    155. 

  155.       </table>
    156. 

  156. </div><div class="memdoc">
    157. 

  157. 

  158. <p>First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. </p>
    159. 

  159. <p>Then, the results are packed into the returned 32-bit unsigned integer.</p>
    160. 

  160. <p>The conversion for component c of v to fixed point is done as follows: packSnorm4x8: round(clamp(c, -1, +1) * 127.0)</p>
    161. 

  161. <p>The first component of the vector will be written to the least significant bits of the output; the last component will be written to the most significant bits.</p>
    162. 

  162. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/packSnorm4x8.xml">GLSL packSnorm4x8 man page</a> </dd>
    163. 

  163. <dd>
    164. 

  164. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions</a> </dd></dl>
    165. 

  165. 

  166. </div>
    167. 

  167. </div>
    168. 

  168. <a class="anchor" id="ga0e2d107039fe608a209497af867b85fb"></a>
    169. 

  169. <div class="memitem">
    170. 

  170. <div class="memproto">
    171. 

  171.       <table class="memname">
    172. 

  172.         <tr>
    173. 

  173.           <td class="memname">GLM_FUNC_DECL uint glm::packUnorm2x16 </td>
    174. 

  174.           <td>(</td>
    175. 

  175.           <td class="paramtype">vec2 const &amp;&#160;</td>
    176. 

  176.           <td class="paramname"><em>v</em></td><td>)</td>
    177. 

  177.           <td></td>
    178. 

  178.         </tr>
    179. 

  179.       </table>
    180. 

  180. </div><div class="memdoc">
    181. 

  181. 

  182. <p>First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. </p>
    183. 

  183. <p>Then, the results are packed into the returned 32-bit unsigned integer.</p>
    184. 

  184. <p>The conversion for component c of v to fixed point is done as follows: packUnorm2x16: round(clamp(c, 0, +1) * 65535.0)</p>
    185. 

  185. <p>The first component of the vector will be written to the least significant bits of the output; the last component will be written to the most significant bits.</p>
    186. 

  186. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/packUnorm2x16.xml">GLSL packUnorm2x16 man page</a> </dd>
    187. 

  187. <dd>
    188. 

  188. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions</a> </dd></dl>
    189. 

  189. 

  190. </div>
    191. 

  191. </div>
    192. 

  192. <a class="anchor" id="gaf7d2f7341a9eeb4a436929d6f9ad08f2"></a>
    193. 

  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 uint glm::packUnorm4x8 </td>
    198. 

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

  199.           <td class="paramtype">vec4 const &amp;&#160;</td>
    200. 

  200.           <td class="paramname"><em>v</em></td><td>)</td>
    201. 

  201.           <td></td>
    202. 

  202.         </tr>
    203. 

  203.       </table>
    204. 

  204. </div><div class="memdoc">
    205. 

  205. 

  206. <p>First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. </p>
    207. 

  207. <p>Then, the results are packed into the returned 32-bit unsigned integer.</p>
    208. 

  208. <p>The conversion for component c of v to fixed point is done as follows: packUnorm4x8: round(clamp(c, 0, +1) * 255.0)</p>
    209. 

  209. <p>The first component of the vector will be written to the least significant bits of the output; the last component will be written to the most significant bits.</p>
    210. 

  210. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/packUnorm4x8.xml">GLSL packUnorm4x8 man page</a> </dd>
    211. 

  211. <dd>
    212. 

  212. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions</a> </dd></dl>
    213. 

  213. 

  214. </div>
    215. 

  215. </div>
    216. 

  216. <a class="anchor" id="gaafb099c61f00a002d975a5b67e1e8eb1"></a>
    217. 

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

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

  221.           <td class="memname">GLM_FUNC_DECL uvec2 glm::unpackDouble2x32 </td>
    222. 

  222.           <td>(</td>
    223. 

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

  224.           <td class="paramname"><em>v</em></td><td>)</td>
    225. 

  225.           <td></td>
    226. 

  226.         </tr>
    227. 

  227.       </table>
    228. 

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

  229. 

  230. <p>Returns a two-component unsigned integer vector representation of v. </p>
    231. 

  231. <p>The bit-level representation of v is preserved. The first component of the vector contains the 32 least significant bits of the double; the second component consists the 32 most significant bits.</p>
    232. 

  232. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/unpackDouble2x32.xml">GLSL unpackDouble2x32 man page</a> </dd>
    233. 

  233. <dd>
    234. 

  234. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions</a> </dd></dl>
    235. 

  235. 

  236. </div>
    237. 

  237. </div>
    238. 

  238. <a class="anchor" id="ga8d431ee6df169088a08f4464976925d9"></a>
    239. 

  239. <div class="memitem">
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  240. <div class="memproto">
    241. 

  241.       <table class="memname">
    242. 

  242.         <tr>
    243. 

  243.           <td class="memname">GLM_FUNC_DECL vec2 glm::unpackHalf2x16 </td>
    244. 

  244.           <td>(</td>
    245. 

  245.           <td class="paramtype">uint const &amp;&#160;</td>
    246. 

  246.           <td class="paramname"><em>v</em></td><td>)</td>
    247. 

  247.           <td></td>
    248. 

  248.         </tr>
    249. 

  249.       </table>
    250. 

  250. </div><div class="memdoc">
    251. 

  251. 

  252. <p>Returns a two-component floating-point vector with components obtained by unpacking a 32-bit unsigned integer into a pair of 16-bit values, interpreting those values as 16-bit floating-point numbers according to the OpenGL Specification, and converting them to 32-bit floating-point values. </p>
    253. 

  253. <p>The first component of the vector is obtained from the 16 least-significant bits of v; the second component is obtained from the 16 most-significant bits of v.</p>
    254. 

  254. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/unpackHalf2x16.xml">GLSL unpackHalf2x16 man page</a> </dd>
    255. 

  255. <dd>
    256. 

  256. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions</a> </dd></dl>
    257. 

  257. 

  258. </div>
    259. 

  259. </div>
    260. 

  260. <a class="anchor" id="ga77a35a82ffa538f921379c362bbeb017"></a>
    261. 

  261. <div class="memitem">
    262. 

  262. <div class="memproto">
    263. 

  263.       <table class="memname">
    264. 

  264.         <tr>
    265. 

  265.           <td class="memname">GLM_FUNC_DECL vec2 glm::unpackSnorm2x16 </td>
    266. 

  266.           <td>(</td>
    267. 

  267.           <td class="paramtype">uint const &amp;&#160;</td>
    268. 

  268.           <td class="paramname"><em>p</em></td><td>)</td>
    269. 

  269.           <td></td>
    270. 

  270.         </tr>
    271. 

  271.       </table>
    272. 

  272. </div><div class="memdoc">
    273. 

  273. 

  274. <p>First, unpacks a single 32-bit unsigned integer p into a pair of 16-bit unsigned integers, four 8-bit unsigned integers, or four 8-bit signed integers. </p>
    275. 

  275. <p>Then, each component is converted to a normalized floating-point value to generate the returned two- or four-component vector.</p>
    276. 

  276. <p>The conversion for unpacked fixed-point value f to floating point is done as follows: unpackSnorm2x16: clamp(f / 32767.0, -1, +1)</p>
    277. 

  277. <p>The first component of the returned vector will be extracted from the least significant bits of the input; the last component will be extracted from the most significant bits.</p>
    278. 

  278. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/unpackSnorm2x16.xml">GLSL unpackSnorm2x16 man page</a> </dd>
    279. 

  279. <dd>
    280. 

  280. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions</a> </dd></dl>
    281. 

  281. 

  282. </div>
    283. 

  283. </div>
    284. 

  284. <a class="anchor" id="ga0ae75b1ab2ff410274fc0b7d8d5b6c7d"></a>
    285. 

  285. <div class="memitem">
    286. 

  286. <div class="memproto">
    287. 

  287.       <table class="memname">
    288. 

  288.         <tr>
    289. 

  289.           <td class="memname">GLM_FUNC_DECL vec4 glm::unpackSnorm4x8 </td>
    290. 

  290.           <td>(</td>
    291. 

  291.           <td class="paramtype">uint const &amp;&#160;</td>
    292. 

  292.           <td class="paramname"><em>p</em></td><td>)</td>
    293. 

  293.           <td></td>
    294. 

  294.         </tr>
    295. 

  295.       </table>
    296. 

  296. </div><div class="memdoc">
    297. 

  297. 

  298. <p>First, unpacks a single 32-bit unsigned integer p into a pair of 16-bit unsigned integers, four 8-bit unsigned integers, or four 8-bit signed integers. </p>
    299. 

  299. <p>Then, each component is converted to a normalized floating-point value to generate the returned two- or four-component vector.</p>
    300. 

  300. <p>The conversion for unpacked fixed-point value f to floating point is done as follows: unpackSnorm4x8: clamp(f / 127.0, -1, +1)</p>
    301. 

  301. <p>The first component of the returned vector will be extracted from the least significant bits of the input; the last component will be extracted from the most significant bits.</p>
    302. 

  302. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/unpackSnorm4x8.xml">GLSL unpackSnorm4x8 man page</a> </dd>
    303. 

  303. <dd>
    304. 

  304. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions</a> </dd></dl>
    305. 

  305. 

  306. </div>
    307. 

  307. </div>
    308. 

  308. <a class="anchor" id="ga7203eea0c2c897acddee6936c9bd5343"></a>
    309. 

  309. <div class="memitem">
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  310. <div class="memproto">
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    312. 

  312.         <tr>
    313. 

  313.           <td class="memname">GLM_FUNC_DECL vec2 glm::unpackUnorm2x16 </td>
    314. 

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

  315.           <td class="paramtype">uint const &amp;&#160;</td>
    316. 

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

  317.           <td></td>
    318. 

  318.         </tr>
    319. 

  319.       </table>
    320. 

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

  321. 

  322. <p>First, unpacks a single 32-bit unsigned integer p into a pair of 16-bit unsigned integers, four 8-bit unsigned integers, or four 8-bit signed integers. </p>
    323. 

  323. <p>Then, each component is converted to a normalized floating-point value to generate the returned two- or four-component vector.</p>
    324. 

  324. <p>The conversion for unpacked fixed-point value f to floating point is done as follows: unpackUnorm2x16: f / 65535.0</p>
    325. 

  325. <p>The first component of the returned vector will be extracted from the least significant bits of the input; the last component will be extracted from the most significant bits.</p>
    326. 

  326. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/unpackUnorm2x16.xml">GLSL unpackUnorm2x16 man page</a> </dd>
    327. 

  327. <dd>
    328. 

  328. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions</a> </dd></dl>
    329. 

  329. 

  330. </div>
    331. 

  331. </div>
    332. 

  332. <a class="anchor" id="gaa2dee2a1ff4707d710d90c17985d0b40"></a>
    333. 

  333. <div class="memitem">
    334. 

  334. <div class="memproto">
    335. 

  335.       <table class="memname">
    336. 

  336.         <tr>
    337. 

  337.           <td class="memname">GLM_FUNC_DECL vec4 glm::unpackUnorm4x8 </td>
    338. 

  338.           <td>(</td>
    339. 

  339.           <td class="paramtype">uint const &amp;&#160;</td>
    340. 

  340.           <td class="paramname"><em>p</em></td><td>)</td>
    341. 

  341.           <td></td>
    342. 

  342.         </tr>
    343. 

  343.       </table>
    344. 

  344. </div><div class="memdoc">
    345. 

  345. 

  346. <p>First, unpacks a single 32-bit unsigned integer p into a pair of 16-bit unsigned integers, four 8-bit unsigned integers, or four 8-bit signed integers. </p>
    347. 

  347. <p>Then, each component is converted to a normalized floating-point value to generate the returned two- or four-component vector.</p>
    348. 

  348. <p>The conversion for unpacked fixed-point value f to floating point is done as follows: unpackUnorm4x8: f / 255.0</p>
    349. 

  349. <p>The first component of the returned vector will be extracted from the least significant bits of the input; the last component will be extracted from the most significant bits.</p>
    350. 

  350. <dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/unpackUnorm4x8.xml">GLSL unpackUnorm4x8 man page</a> </dd>
    351. 

  351. <dd>
    352. 

  352. <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions</a> </dd></dl>
    353. 

  353. 

  354. </div>
    355. 

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    356. 

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    359. 

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