mirror/glm
1
0
Fork 0
mirror of https://github.com/g-truc/glm.git synced 2024-11-22 17:04:35 +00:00
Code Issues Packages Projects Releases Wiki Activity
c9831664c9
glm/doc/api/a00157.html
Christophe Riccio 10c3d324a3 updated API
2015-08-02 10:23:00 +02:00

365 lines
23 KiB
HTML
Raw Blame History

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<meta name="generator" content="Doxygen 1.8.10"/>
<title>0.9.7: Floating-Point Pack and Unpack Functions</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td id="projectlogo"><img alt="Logo" src="logo.png"/></td>
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">0.9.7
</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.8.10 -->
<div id="navrow1" class="tabs">
<ul class="tablist">
<li><a href="index.html"><span>Main&#160;Page</span></a></li>
<li><a href="modules.html"><span>Modules</span></a></li>
<li><a href="files.html"><span>Files</span></a></li>
</ul>
</div>
</div><!-- top -->
<div class="header">
<div class="summary">
<a href="#func-members">Functions</a> </div>
<div class="headertitle">
<div class="title">Floating-Point Pack and Unpack Functions<div class="ingroups"><a class="el" href="a00162.html">GLM Core</a></div></div> </div>
</div><!--header-->
<div class="contents">
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<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="a00157.html#gaa916ca426b2bb0343ba17e3753e245c2">packDouble2x32</a> (uvec2 const &amp;v)</td></tr>
<tr class="separator:gaa916ca426b2bb0343ba17e3753e245c2"><td class="memSeparator" colspan="2">&#160;</td></tr>
<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="a00157.html#ga20f134b07db3a3d3a38efb2617388c92">packHalf2x16</a> (vec2 const &amp;v)</td></tr>
<tr class="separator:ga20f134b07db3a3d3a38efb2617388c92"><td class="memSeparator" colspan="2">&#160;</td></tr>
<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="a00157.html#ga977ab172da5494e5ac63e952afacfbe2">packSnorm2x16</a> (vec2 const &amp;v)</td></tr>
<tr class="separator:ga977ab172da5494e5ac63e952afacfbe2"><td class="memSeparator" colspan="2">&#160;</td></tr>
<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="a00157.html#ga85e8f17627516445026ab7a9c2e3531a">packSnorm4x8</a> (vec4 const &amp;v)</td></tr>
<tr class="separator:ga85e8f17627516445026ab7a9c2e3531a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<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="a00157.html#ga0e2d107039fe608a209497af867b85fb">packUnorm2x16</a> (vec2 const &amp;v)</td></tr>
<tr class="separator:ga0e2d107039fe608a209497af867b85fb"><td class="memSeparator" colspan="2">&#160;</td></tr>
<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="a00157.html#gaf7d2f7341a9eeb4a436929d6f9ad08f2">packUnorm4x8</a> (vec4 const &amp;v)</td></tr>
<tr class="separator:gaf7d2f7341a9eeb4a436929d6f9ad08f2"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga5f4296dc5f12f0aa67ac05b8bb322483"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL uvec2&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00157.html#ga5f4296dc5f12f0aa67ac05b8bb322483">unpackDouble2x32</a> (double v)</td></tr>
<tr class="separator:ga5f4296dc5f12f0aa67ac05b8bb322483"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gaf59b52e6b28da9335322c4ae19b5d745"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL vec2&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00157.html#gaf59b52e6b28da9335322c4ae19b5d745">unpackHalf2x16</a> (uint v)</td></tr>
<tr class="separator:gaf59b52e6b28da9335322c4ae19b5d745"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gacd8f8971a3fe28418be0d0fa1f786b38"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL vec2&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00157.html#gacd8f8971a3fe28418be0d0fa1f786b38">unpackSnorm2x16</a> (uint p)</td></tr>
<tr class="separator:gacd8f8971a3fe28418be0d0fa1f786b38"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga2db488646d48b7c43d3218954523fe82"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL vec4&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00157.html#ga2db488646d48b7c43d3218954523fe82">unpackSnorm4x8</a> (uint p)</td></tr>
<tr class="separator:ga2db488646d48b7c43d3218954523fe82"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga1f66188e5d65afeb9ffba1ad971e4007"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL vec2&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00157.html#ga1f66188e5d65afeb9ffba1ad971e4007">unpackUnorm2x16</a> (uint p)</td></tr>
<tr class="separator:ga1f66188e5d65afeb9ffba1ad971e4007"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga7f903259150b67e9466f5f8edffcd197"><td class="memItemLeft" align="right" valign="top">GLM_FUNC_DECL vec4&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00157.html#ga7f903259150b67e9466f5f8edffcd197">unpackUnorm4x8</a> (uint p)</td></tr>
<tr class="separator:ga7f903259150b67e9466f5f8edffcd197"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>These functions do not operate component-wise, rather as described in each case. </p>
<h2 class="groupheader">Function Documentation</h2>
<a class="anchor" id="gaa916ca426b2bb0343ba17e3753e245c2"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLM_FUNC_DECL double glm::packDouble2x32 </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00163.html#ga9bcffa2d49f28d16f680757b5c0e7c84">uvec2</a> const &amp;&#160;</td>
<td class="paramname"><em>v</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Returns a double-precision value obtained by packing the components of v into a 64-bit value. </p>
<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>
<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>
<dd>
<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>
</div>
</div>
<a class="anchor" id="ga20f134b07db3a3d3a38efb2617388c92"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLM_FUNC_DECL uint glm::packHalf2x16 </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00163.html#ga09d0200e8ff86391d8804b4fefd5f1da">vec2</a> const &amp;&#160;</td>
<td class="paramname"><em>v</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<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>
<p>The first vector component specifies the 16 least-significant bits of the result; the second component specifies the 16 most-significant bits.</p>
<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>
<dd>
<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>
</div>
</div>
<a class="anchor" id="ga977ab172da5494e5ac63e952afacfbe2"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLM_FUNC_DECL uint glm::packSnorm2x16 </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00163.html#ga09d0200e8ff86391d8804b4fefd5f1da">vec2</a> const &amp;&#160;</td>
<td class="paramname"><em>v</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. </p>
<p>Then, the results are packed into the returned 32-bit unsigned integer.</p>
<p>The conversion for component c of v to fixed point is done as follows: packSnorm2x16: round(clamp(v, -1, +1) * 32767.0)</p>
<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>
<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>
<dd>
<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>
</div>
</div>
<a class="anchor" id="ga85e8f17627516445026ab7a9c2e3531a"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLM_FUNC_DECL uint glm::packSnorm4x8 </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00163.html#gafbab23070ca47932487d25332adc7d7c">vec4</a> const &amp;&#160;</td>
<td class="paramname"><em>v</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. </p>
<p>Then, the results are packed into the returned 32-bit unsigned integer.</p>
<p>The conversion for component c of v to fixed point is done as follows: packSnorm4x8: round(clamp(c, -1, +1) * 127.0)</p>
<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>
<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>
<dd>
<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>
</div>
</div>
<a class="anchor" id="ga0e2d107039fe608a209497af867b85fb"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLM_FUNC_DECL uint glm::packUnorm2x16 </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00163.html#ga09d0200e8ff86391d8804b4fefd5f1da">vec2</a> const &amp;&#160;</td>
<td class="paramname"><em>v</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. </p>
<p>Then, the results are packed into the returned 32-bit unsigned integer.</p>
<p>The conversion for component c of v to fixed point is done as follows: packUnorm2x16: round(clamp(c, 0, +1) * 65535.0)</p>
<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>
<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>
<dd>
<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>
</div>
</div>
<a class="anchor" id="gaf7d2f7341a9eeb4a436929d6f9ad08f2"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLM_FUNC_DECL uint glm::packUnorm4x8 </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00163.html#gafbab23070ca47932487d25332adc7d7c">vec4</a> const &amp;&#160;</td>
<td class="paramname"><em>v</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. </p>
<p>Then, the results are packed into the returned 32-bit unsigned integer.</p>
<p>The conversion for component c of v to fixed point is done as follows: packUnorm4x8: round(clamp(c, 0, +1) * 255.0)</p>
<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>
<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>
<dd>
<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>
</div>
</div>
<a class="anchor" id="ga5f4296dc5f12f0aa67ac05b8bb322483"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLM_FUNC_DECL uvec2 glm::unpackDouble2x32 </td>
<td>(</td>
<td class="paramtype">double&#160;</td>
<td class="paramname"><em>v</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Returns a two-component unsigned integer vector representation of v. </p>
<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>
<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>
<dd>
<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>
</div>
</div>
<a class="anchor" id="gaf59b52e6b28da9335322c4ae19b5d745"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLM_FUNC_DECL vec2 glm::unpackHalf2x16 </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00164.html#ga91ad9478d81a7aaf2593e8d9c3d06a14">uint</a>&#160;</td>
<td class="paramname"><em>v</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<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>
<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>
<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>
<dd>
<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>
</div>
</div>
<a class="anchor" id="gacd8f8971a3fe28418be0d0fa1f786b38"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLM_FUNC_DECL vec2 glm::unpackSnorm2x16 </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00164.html#ga91ad9478d81a7aaf2593e8d9c3d06a14">uint</a>&#160;</td>
<td class="paramname"><em>p</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<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>
<p>Then, each component is converted to a normalized floating-point value to generate the returned two- or four-component vector.</p>
<p>The conversion for unpacked fixed-point value f to floating point is done as follows: unpackSnorm2x16: clamp(f / 32767.0, -1, +1)</p>
<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>
<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>
<dd>
<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>
</div>
</div>
<a class="anchor" id="ga2db488646d48b7c43d3218954523fe82"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLM_FUNC_DECL vec4 glm::unpackSnorm4x8 </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00164.html#ga91ad9478d81a7aaf2593e8d9c3d06a14">uint</a>&#160;</td>
<td class="paramname"><em>p</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<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>
<p>Then, each component is converted to a normalized floating-point value to generate the returned two- or four-component vector.</p>
<p>The conversion for unpacked fixed-point value f to floating point is done as follows: unpackSnorm4x8: clamp(f / 127.0, -1, +1)</p>
<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>
<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>
<dd>
<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>
</div>
</div>
<a class="anchor" id="ga1f66188e5d65afeb9ffba1ad971e4007"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLM_FUNC_DECL vec2 glm::unpackUnorm2x16 </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00164.html#ga91ad9478d81a7aaf2593e8d9c3d06a14">uint</a>&#160;</td>
<td class="paramname"><em>p</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<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>
<p>Then, each component is converted to a normalized floating-point value to generate the returned two- or four-component vector.</p>
<p>The conversion for unpacked fixed-point value f to floating point is done as follows: unpackUnorm2x16: f / 65535.0</p>
<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>
<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>
<dd>
<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>
</div>
</div>
<a class="anchor" id="ga7f903259150b67e9466f5f8edffcd197"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLM_FUNC_DECL vec4 glm::unpackUnorm4x8 </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00164.html#ga91ad9478d81a7aaf2593e8d9c3d06a14">uint</a>&#160;</td>
<td class="paramname"><em>p</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<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>
<p>Then, each component is converted to a normalized floating-point value to generate the returned two- or four-component vector.</p>
<p>The conversion for unpacked fixed-point value f to floating point is done as follows: unpackUnorm4x8: f / 255.0</p>
<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>
<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>
<dd>
<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>
</div>
</div>
</div><!-- contents -->
<!-- start footer part -->
<hr class="footer"/><address class="footer"><small>
Generated by &#160;<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/>
</a> 1.8.10
</small></address>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink