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Christophe Riccio
2016-11-13 00:39:32 +01:00
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<title>0.9.8: Matrix functions</title>
<title>0.9.8 API documenation: Floating-Point Pack and Unpack Functions</title>
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<div class="summary">
<a href="#func-members">Functions</a> </div>
<div class="headertitle">
<div class="title">Matrix functions<div class="ingroups"><a class="el" href="a00156.html">GLM Core</a></div></div> </div>
<div class="title">Floating-Point Pack and Unpack Functions<div class="ingroups"><a class="el" href="a00155.html">GLM Core</a></div></div> </div>
</div><!--header-->
<div class="contents">
<p>These functions do not operate component-wise, rather as described in each case.
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga26ea77c574802bc6fc193c40478718d2"><td class="memTemplParams" colspan="2">template&lt;typename T , precision P, template&lt; typename, precision &gt; class matType&gt; </td></tr>
<tr class="memitem:ga26ea77c574802bc6fc193c40478718d2"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL T&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00150.html#ga26ea77c574802bc6fc193c40478718d2">determinant</a> (matType&lt; T, P &gt; const &amp;m)</td></tr>
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<tr class="memitem:gaa7e1d5586cd499126cec76e0f11871e3"><td class="memTemplParams" colspan="2">template&lt;typename T , precision P, template&lt; typename, precision &gt; class matType&gt; </td></tr>
<tr class="memitem:gaa7e1d5586cd499126cec76e0f11871e3"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL matType&lt; T, P &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00150.html#gaa7e1d5586cd499126cec76e0f11871e3">inverse</a> (matType&lt; T, P &gt; const &amp;m)</td></tr>
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<tr class="memitem:ga4a54992e4741188ee624b21e3ba91814"><td class="memTemplParams" colspan="2">template&lt;typename T , precision P, template&lt; typename, precision &gt; class matType&gt; </td></tr>
<tr class="memitem:ga4a54992e4741188ee624b21e3ba91814"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL matType&lt; T, P &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00150.html#ga4a54992e4741188ee624b21e3ba91814">matrixCompMult</a> (matType&lt; T, P &gt; const &amp;x, matType&lt; T, P &gt; const &amp;y)</td></tr>
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<tr class="memitem:gae9f513dc8e4f3ceb993669321b6d0f09"><td class="memTemplParams" colspan="2">template&lt;typename T , precision P, template&lt; typename, precision &gt; class vecTypeA, template&lt; typename, precision &gt; class vecTypeB&gt; </td></tr>
<tr class="memitem:gae9f513dc8e4f3ceb993669321b6d0f09"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL detail::outerProduct_trait&lt; T, P, vecTypeA, vecTypeB &gt;::type&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00150.html#gae9f513dc8e4f3ceb993669321b6d0f09">outerProduct</a> (vecTypeA&lt; T, P &gt; const &amp;c, vecTypeB&lt; T, P &gt; const &amp;r)</td></tr>
<tr class="separator:gae9f513dc8e4f3ceb993669321b6d0f09"><td class="memSeparator" colspan="2">&#160;</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="a00150.html#gaa916ca426b2bb0343ba17e3753e245c2">packDouble2x32</a> (uvec2 const &amp;v)</td></tr>
<tr class="memdesc:gaa916ca426b2bb0343ba17e3753e245c2"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns a double-precision value obtained by packing the components of v into a 64-bit value. <a href="a00150.html#gaa916ca426b2bb0343ba17e3753e245c2">More...</a><br /></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="a00150.html#ga20f134b07db3a3d3a38efb2617388c92">packHalf2x16</a> (vec2 const &amp;v)</td></tr>
<tr class="memdesc:ga20f134b07db3a3d3a38efb2617388c92"><td class="mdescLeft">&#160;</td><td class="mdescRight">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. <a href="a00150.html#ga20f134b07db3a3d3a38efb2617388c92">More...</a><br /></td></tr>
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<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="a00150.html#ga977ab172da5494e5ac63e952afacfbe2">packSnorm2x16</a> (vec2 const &amp;v)</td></tr>
<tr class="memdesc:ga977ab172da5494e5ac63e952afacfbe2"><td class="mdescLeft">&#160;</td><td class="mdescRight">First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. <a href="a00150.html#ga977ab172da5494e5ac63e952afacfbe2">More...</a><br /></td></tr>
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<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="a00150.html#ga85e8f17627516445026ab7a9c2e3531a">packSnorm4x8</a> (vec4 const &amp;v)</td></tr>
<tr class="memdesc:ga85e8f17627516445026ab7a9c2e3531a"><td class="mdescLeft">&#160;</td><td class="mdescRight">First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. <a href="a00150.html#ga85e8f17627516445026ab7a9c2e3531a">More...</a><br /></td></tr>
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<tr class="memdesc:ga0e2d107039fe608a209497af867b85fb"><td class="mdescLeft">&#160;</td><td class="mdescRight">First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. <a href="a00150.html#ga0e2d107039fe608a209497af867b85fb">More...</a><br /></td></tr>
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<tr class="memdesc:gaf7d2f7341a9eeb4a436929d6f9ad08f2"><td class="mdescLeft">&#160;</td><td class="mdescRight">First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. <a href="a00150.html#gaf7d2f7341a9eeb4a436929d6f9ad08f2">More...</a><br /></td></tr>
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<tr class="memdesc:ga5f4296dc5f12f0aa67ac05b8bb322483"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns a two-component unsigned integer vector representation of v. <a href="a00150.html#ga5f4296dc5f12f0aa67ac05b8bb322483">More...</a><br /></td></tr>
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<tr class="memdesc:gaf59b52e6b28da9335322c4ae19b5d745"><td class="mdescLeft">&#160;</td><td class="mdescRight">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. <a href="a00150.html#gaf59b52e6b28da9335322c4ae19b5d745">More...</a><br /></td></tr>
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<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="a00150.html#gacd8f8971a3fe28418be0d0fa1f786b38">unpackSnorm2x16</a> (uint p)</td></tr>
<tr class="memdesc:gacd8f8971a3fe28418be0d0fa1f786b38"><td class="mdescLeft">&#160;</td><td class="mdescRight">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. <a href="a00150.html#gacd8f8971a3fe28418be0d0fa1f786b38">More...</a><br /></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="a00150.html#ga2db488646d48b7c43d3218954523fe82">unpackSnorm4x8</a> (uint p)</td></tr>
<tr class="memdesc:ga2db488646d48b7c43d3218954523fe82"><td class="mdescLeft">&#160;</td><td class="mdescRight">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. <a href="a00150.html#ga2db488646d48b7c43d3218954523fe82">More...</a><br /></td></tr>
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<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="a00150.html#ga1f66188e5d65afeb9ffba1ad971e4007">unpackUnorm2x16</a> (uint p)</td></tr>
<tr class="memdesc:ga1f66188e5d65afeb9ffba1ad971e4007"><td class="mdescLeft">&#160;</td><td class="mdescRight">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. <a href="a00150.html#ga1f66188e5d65afeb9ffba1ad971e4007">More...</a><br /></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="a00150.html#ga7f903259150b67e9466f5f8edffcd197">unpackUnorm4x8</a> (uint p)</td></tr>
<tr class="memdesc:ga7f903259150b67e9466f5f8edffcd197"><td class="mdescLeft">&#160;</td><td class="mdescRight">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. <a href="a00150.html#ga7f903259150b67e9466f5f8edffcd197">More...</a><br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>For each of the following built-in matrix functions, there is both a single-precision floating point version, where all arguments and return values are single precision, and a double-precision floating version, where all arguments and return values are double precision. </p>
<p>Only the single-precision floating point version is shown. </p>
<p>These functions do not operate component-wise, rather as described in each case. </p>
<h2 class="groupheader">Function Documentation</h2>
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<td class="memname">GLM_FUNC_DECL T glm::determinant </td>
<td class="memname">GLM_FUNC_DECL double glm::packDouble2x32 </td>
<td>(</td>
<td class="paramtype">matType&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>m</em></td><td>)</td>
<td class="paramtype"><a class="el" href="a00156.html#ga9bcffa2d49f28d16f680757b5c0e7c84">uvec2</a> const &amp;&#160;</td>
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<p>Returns the transposed matrix of x. </p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">matType</td><td>Floating-point matrix types.</td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/transpose.xml">GLSL transpose man page</a> </dd>
<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 8.6 Matrix Functions</a> Return the determinant of a squared matrix.</dd></dl>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">valType</td><td>Floating-point scalar types.</td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/determinant.xml">GLSL determinant man page</a> </dd>
<dd>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.6 Matrix Functions</a> </dd></dl>
<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>
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<td class="memname">GLM_FUNC_DECL uint glm::packHalf2x16 </td>
<td>(</td>
<td class="paramtype">matType&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>m</em></td><td>)</td>
<td class="paramtype"><a class="el" href="a00156.html#ga09d0200e8ff86391d8804b4fefd5f1da">vec2</a> const &amp;&#160;</td>
<td class="paramname"><em>v</em></td><td>)</td>
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<p>Return the inverse of a squared matrix. </p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">valType</td><td>Floating-point scalar types.</td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/inverse.xml">GLSL inverse man page</a> </dd>
<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 8.6 Matrix Functions</a> </dd></dl>
<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>
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<td class="memname">GLM_FUNC_DECL uint glm::packSnorm2x16 </td>
<td>(</td>
<td class="paramtype">matType&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>x</em>, </td>
</tr>
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<td class="paramkey"></td>
<td class="paramtype"><a class="el" href="a00156.html#ga09d0200e8ff86391d8804b4fefd5f1da">vec2</a> const &amp;&#160;</td>
<td class="paramname"><em>v</em></td><td>)</td>
<td></td>
<td class="paramtype">matType&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>y</em>&#160;</td>
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<p>Multiply matrix x by matrix y component-wise, i.e., result[i][j] is the scalar product of x[i][j] and y[i][j]. </p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">matType</td><td>Floating-point matrix types.</td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/matrixCompMult.xml">GLSL matrixCompMult man page</a> </dd>
<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 8.6 Matrix Functions</a> </dd></dl>
<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>
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<td class="memname">GLM_FUNC_DECL detail::outerProduct_trait&lt;T, P, vecTypeA, vecTypeB&gt;::type glm::outerProduct </td>
<td class="memname">GLM_FUNC_DECL uint glm::packSnorm4x8 </td>
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<td class="paramname"><em>c</em>, </td>
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<td class="paramtype"><a class="el" href="a00156.html#gafbab23070ca47932487d25332adc7d7c">vec4</a> const &amp;&#160;</td>
<td class="paramname"><em>v</em></td><td>)</td>
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<td class="paramtype">vecTypeB&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>r</em>&#160;</td>
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<p>Treats the first parameter c as a column vector and the second parameter r as a row vector and does a linear algebraic matrix multiply c * r. </p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">matType</td><td>Floating-point matrix types.</td></tr>
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</dd>
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<dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/outerProduct.xml">GLSL outerProduct man page</a> </dd>
<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 8.6 Matrix Functions</a> </dd></dl>
<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>
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<td class="memname">GLM_FUNC_DECL uint glm::packUnorm2x16 </td>
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<td class="paramtype"><a class="el" href="a00156.html#ga09d0200e8ff86391d8804b4fefd5f1da">vec2</a> const &amp;&#160;</td>
<td class="paramname"><em>v</em></td><td>)</td>
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<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>
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<td class="memname">GLM_FUNC_DECL uint glm::packUnorm4x8 </td>
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<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>
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<td class="memname">GLM_FUNC_DECL uvec2 glm::unpackDouble2x32 </td>
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<td class="paramname"><em>v</em></td><td>)</td>
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<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>
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<td class="memname">GLM_FUNC_DECL vec2 glm::unpackHalf2x16 </td>
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<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>
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<td class="memname">GLM_FUNC_DECL vec2 glm::unpackSnorm2x16 </td>
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<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>
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<td class="memname">GLM_FUNC_DECL vec4 glm::unpackSnorm4x8 </td>
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<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>
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<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>
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<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>
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