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<a href="#func-members">Functions</a> </div>
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<div class="title">Floating-Point Pack and Unpack Functions<div class="ingroups"><a class="el" href="a00148.html">Core features</a></div></div> </div>
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<p>Include &lt;<a class="el" href="a00078.html" title="Core features ">glm/packing.hpp</a>&gt; to use these core features.
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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="a00239.html#gaa916ca426b2bb0343ba17e3753e245c2">packDouble2x32</a> (uvec2 const &amp;v)</td></tr>
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<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="a00239.html#ga20f134b07db3a3d3a38efb2617388c92">More...</a><br /></td></tr>
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<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="a00239.html#ga2db488646d48b7c43d3218954523fe82">More...</a><br /></td></tr>
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typedef float&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00681.html#gaacdc525d6f7bddb3ae95d5c311bd06a1">float32</a></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>Include &lt;<a class="el" href="a00078.html" title="Core features ">glm/packing.hpp</a>&gt; to use these core features. </p>
<p>These functions do not operate component-wise, rather as described in each case. </p>
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<div class="textblock"><p><a class="el" href="a00681.html">GLM_EXT_scalar_float_sized</a> </p>
<p>Returns a double-qualifier 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>
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<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>
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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: 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>
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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: 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>
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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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<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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<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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<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="paramtype"><a class="el" href="a00150.html#ga91ad9478d81a7aaf2593e8d9c3d06a14">uint</a>&#160;</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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<td class="paramtype"><a class="el" href="a00150.html#ga91ad9478d81a7aaf2593e8d9c3d06a14">uint</a>&#160;</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: 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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<p class="definition">Definition in file <a class="el" href="a00239_source.html">scalar_float_sized.hpp</a>.</p>
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