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Christophe Riccio
2014-11-30 21:57:58 +01:00
parent a1e34d02ff
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<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
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<title>0.9.6: Geometric functions</title>
<title>0.9.6: Integer functions</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
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<div class="summary">
<a href="#func-members">Functions</a> </div>
<div class="headertitle">
<div class="title">Geometric functions<div class="ingroups"><a class="el" href="a00161.html">GLM Core</a></div></div> </div>
<div class="title">Integer functions<div class="ingroups"><a class="el" href="a00160.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:gafe2cae8cb26fd44be62aee97369d0af8"><td class="memTemplParams" colspan="2">template&lt;typename T , precision P&gt; </td></tr>
<tr class="memitem:gafe2cae8cb26fd44be62aee97369d0af8"><td class="memTemplItemLeft" align="right" valign="top">GLM_FUNC_DECL tvec3&lt; T, P &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a00152.html#gafe2cae8cb26fd44be62aee97369d0af8">cross</a> (tvec3&lt; T, P &gt; const &amp;x, tvec3&lt; T, P &gt; const &amp;y)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>These operate on vectors as vectors, not component-wise. </p>
<p>These all operate component-wise. </p>
<p>The description is per component. The notation [a, b] means the set of bits from bit-number a through bit-number b, inclusive. The lowest-order bit is bit 0. </p>
<h2 class="groupheader">Function Documentation</h2>
<a class="anchor" id="gafe2cae8cb26fd44be62aee97369d0af8"></a>
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<td class="memname">GLM_FUNC_DECL tvec3&lt;T, P&gt; glm::cross </td>
<td class="memname">GLM_FUNC_DECL int glm::bitCount </td>
<td>(</td>
<td class="paramtype">tvec3&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>x</em>, </td>
<td class="paramtype">genType&#160;</td>
<td class="paramname"><em>v</em></td><td>)</td>
<td></td>
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<p>Returns the number of bits set to 1 in the binary representation of value. </p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">T</td><td>Signed or unsigned integer scalar or vector 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/bitCount.xml">GLSL bitCount man page</a> </dd>
<dd>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8 Integer Functions</a> </dd></dl>
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<td>(</td>
<td class="paramtype">vecType&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>v</em></td><td>)</td>
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<p>Returns the number of bits set to 1 in the binary representation of value. </p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">T</td><td>Signed or unsigned integer scalar or vector 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/bitCount.xml">GLSL bitCount man page</a> </dd>
<dd>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8 Integer Functions</a> </dd></dl>
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<td class="memname">GLM_FUNC_DECL vecType&lt;T, P&gt; glm::bitfieldExtract </td>
<td>(</td>
<td class="paramtype">vecType&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>Value</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">tvec3&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>y</em>&#160;</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>Offset</em>, </td>
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@@ -97,34 +173,48 @@ Functions</h2></td></tr>
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<p>Returns the cross product of x and y. </p>
<p>Extracts bits [offset, offset + bits - 1] from value, returning them in the least significant bits of the result. </p>
<p>For unsigned data types, the most significant bits of the result will be set to zero. For signed data types, the most significant bits will be set to the value of bit offset + base - 1.</p>
<p>If bits is zero, the result will be zero. The result will be undefined if offset or bits is negative, or if the sum of offset and bits is greater than the number of bits used to store the operand.</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>
<tr><td class="paramname">T</td><td>Signed or unsigned integer scalar or vector types.</td></tr>
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</dd>
</dl>
<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>
<dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/bitfieldExtract.xml">GLSL bitfieldExtract man page</a> </dd>
<dd>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.5 Geometric Functions</a> </dd></dl>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8 Integer Functions</a> </dd></dl>
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<td class="memname">GLM_FUNC_DECL T glm::distance </td>
<td class="memname">GLM_FUNC_DECL vecType&lt;T, P&gt; glm::bitfieldInsert </td>
<td>(</td>
<td class="paramtype">vecType&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>p0</em>, </td>
<td class="paramname"><em>Base</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">vecType&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>p1</em>&#160;</td>
<td class="paramname"><em>Insert</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>Offset</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>Bits</em>&#160;</td>
</tr>
<tr>
<td></td>
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<p>Returns the distance betwwen p0 and p1, i.e., length(p0 - p1). </p>
<p>Returns the insertion the bits least-significant bits of insert into base. </p>
<p>The result will have bits [offset, offset + bits - 1] taken from bits [0, bits - 1] of insert, and all other bits taken directly from the corresponding bits of base. If bits is zero, the result will simply be base. The result will be undefined if offset or bits is negative, or if the sum of offset and bits is greater than the number of bits used to store the operand.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">genType</td><td>Floating-point vector types.</td></tr>
<tr><td class="paramname">T</td><td>Signed or unsigned integer scalar or vector 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/distance.xml">GLSL distance man page</a> </dd>
<dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/bitfieldInsert.xml">GLSL bitfieldInsert man page</a> </dd>
<dd>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.5 Geometric Functions</a> </dd></dl>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8 Integer Functions</a> </dd></dl>
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<td class="memname">GLM_FUNC_DECL T glm::dot </td>
<td class="memname">GLM_FUNC_DECL vecType&lt;T, P&gt; glm::bitfieldReverse </td>
<td>(</td>
<td class="paramtype">vecType&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>x</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td class="paramname"><em>v</em></td><td>)</td>
<td></td>
<td class="paramtype">vecType&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>y</em>&#160;</td>
</tr>
<tr>
<td></td>
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<p>Returns the dot product of x and y, i.e., result = x * y. </p>
<p>Returns the reversal of the bits of value. </p>
<p>The bit numbered n of the result will be taken from bit (bits - 1) - n of value, where bits is the total number of bits used to represent value.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">genType</td><td>Floating-point vector types.</td></tr>
<tr><td class="paramname">T</td><td>Signed or unsigned integer scalar or vector 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/dot.xml">GLSL dot man page</a> </dd>
<dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/bitfieldReverse.xml">GLSL bitfieldReverse man page</a> </dd>
<dd>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.5 Geometric Functions</a> </dd></dl>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8 Integer Functions</a> </dd></dl>
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<td class="memname">GLM_FUNC_DECL genType glm::faceforward </td>
<td class="memname">GLM_FUNC_DECL int glm::findLSB </td>
<td>(</td>
<td class="paramtype">genType const &amp;&#160;</td>
<td class="paramname"><em>N</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">genType const &amp;&#160;</td>
<td class="paramname"><em>I</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">genType const &amp;&#160;</td>
<td class="paramname"><em>Nref</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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</table>
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<p>If dot(Nref, I) &lt; 0.0, return N, otherwise, return -N. </p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">genType</td><td>Floating-point vector 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/faceforward.xml">GLSL faceforward man page</a> </dd>
<dd>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.5 Geometric Functions</a> </dd></dl>
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<td class="memname">GLM_FUNC_DECL T glm::length </td>
<td>(</td>
<td class="paramtype">vecType&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramtype">genIUType&#160;</td>
<td class="paramname"><em>x</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Returns the length of x, i.e., sqrt(x * x). </p>
<p>Returns the bit number of the least significant bit set to 1 in the binary representation of value. </p>
<p>If value is zero, -1 will be returned.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">genType</td><td>Floating-point vector types.</td></tr>
<tr><td class="paramname">T</td><td>Signed or unsigned integer 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/length.xml">GLSL length man page</a> </dd>
<dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/findLSB.xml">GLSL findLSB man page</a> </dd>
<dd>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.5 Geometric Functions</a> </dd></dl>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8 Integer Functions</a> </dd></dl>
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<td class="memname">GLM_FUNC_DECL vecType&lt;T, P&gt; glm::normalize </td>
<td class="memname">GLM_FUNC_DECL vecType&lt;int, P&gt; glm::findLSB </td>
<td>(</td>
<td class="paramtype">vecType&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>v</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Returns the bit number of the least significant bit set to 1 in the binary representation of value. </p>
<p>If value is zero, -1 will be returned.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">T</td><td>Signed or unsigned integer 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/findLSB.xml">GLSL findLSB man page</a> </dd>
<dd>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8 Integer Functions</a> </dd></dl>
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<td class="memname">GLM_FUNC_DECL int glm::findMSB </td>
<td>(</td>
<td class="paramtype">genIUType&#160;</td>
<td class="paramname"><em>x</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Returns a vector in the same direction as x but with length of 1. </p>
<p>According to issue 10 GLSL 1.10 specification, if length(x) == 0 then result is undefined and generate an error.</p>
<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>
<p>Returns the bit number of the most significant bit in the binary representation of value. </p>
<p>For positive integers, the result will be the bit number of the most significant bit set to 1. For negative integers, the result will be the bit number of the most significant bit set to 0. For a value of zero or negative one, -1 will be returned.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">T</td><td>Signed or unsigned integer 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/findMSB.xml">GLSL findMSB man page</a> </dd>
<dd>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.5 Geometric Functions</a> </dd></dl>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8 Integer Functions</a> </dd></dl>
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<td class="memname">GLM_FUNC_DECL genType glm::reflect </td>
<td class="memname">GLM_FUNC_DECL vecType&lt;int, P&gt; glm::findMSB </td>
<td>(</td>
<td class="paramtype">genType const &amp;&#160;</td>
<td class="paramname"><em>I</em>, </td>
<td class="paramtype">vecType&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>v</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Returns the bit number of the most significant bit in the binary representation of value. </p>
<p>For positive integers, the result will be the bit number of the most significant bit set to 1. For negative integers, the result will be the bit number of the most significant bit set to 0. For a value of zero or negative one, -1 will be returned.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">T</td><td>Signed or unsigned integer 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/findMSB.xml">GLSL findMSB man page</a> </dd>
<dd>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8 Integer Functions</a> </dd></dl>
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<td class="memname">GLM_FUNC_DECL void glm::imulExtended </td>
<td>(</td>
<td class="paramtype">vecType&lt; int, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>x</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">genType const &amp;&#160;</td>
<td class="paramname"><em>N</em>&#160;</td>
<td class="paramtype">vecType&lt; int, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>y</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">vecType&lt; int, P &gt; &amp;&#160;</td>
<td class="paramname"><em>msb</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">vecType&lt; int, P &gt; &amp;&#160;</td>
<td class="paramname"><em>lsb</em>&#160;</td>
</tr>
<tr>
<td></td>
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<p>For the incident vector I and surface orientation N, returns the reflection direction : result = I - 2.0 * dot(N, I) * N. </p>
<p>Multiplies 32-bit integers x and y, producing a 64-bit result. </p>
<p>The 32 least-significant bits are returned in lsb. The 32 most-significant bits are returned in msb.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">genType</td><td>Floating-point vector types.</td></tr>
<tr><td class="paramname">genIType</td><td>Signed integer scalar or vector 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/reflect.xml">GLSL reflect man page</a> </dd>
<dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/imulExtended.xml">GLSL imulExtended man page</a> </dd>
<dd>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.5 Geometric Functions</a> </dd></dl>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8 Integer Functions</a> </dd></dl>
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<td class="memname">GLM_FUNC_DECL vecType&lt;T, P&gt; glm::refract </td>
<td class="memname">GLM_FUNC_DECL vecType&lt;uint, P&gt; glm::uaddCarry </td>
<td>(</td>
<td class="paramtype">vecType&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>I</em>, </td>
<td class="paramtype">vecType&lt; uint, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>x</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">vecType&lt; T, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>N</em>, </td>
<td class="paramtype">vecType&lt; uint, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>y</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">T&#160;</td>
<td class="paramname"><em>eta</em>&#160;</td>
<td class="paramtype">vecType&lt; uint, P &gt; &amp;&#160;</td>
<td class="paramname"><em>carry</em>&#160;</td>
</tr>
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<p>For the incident vector I and surface normal N, and the ratio of indices of refraction eta, return the refraction vector. </p>
<p>Adds 32-bit unsigned integer x and y, returning the sum modulo pow(2, 32). </p>
<p>The value carry is set to 0 if the sum was less than pow(2, 32), or to 1 otherwise.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">genType</td><td>Floating-point vector types.</td></tr>
<tr><td class="paramname">genUType</td><td>Unsigned integer scalar or vector 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/refract.xml">GLSL refract man page</a> </dd>
<dl class="section see"><dt>See also</dt><dd><a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/uaddCarry.xml">GLSL uaddCarry man page</a> </dd>
<dd>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.5 Geometric Functions</a> </dd></dl>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8 Integer Functions</a> </dd></dl>
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<td>(</td>
<td class="paramtype">vecType&lt; uint, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>x</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">vecType&lt; uint, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>y</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">vecType&lt; uint, P &gt; &amp;&#160;</td>
<td class="paramname"><em>msb</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">vecType&lt; uint, P &gt; &amp;&#160;</td>
<td class="paramname"><em>lsb</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
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<p>Multiplies 32-bit integers x and y, producing a 64-bit result. </p>
<p>The 32 least-significant bits are returned in lsb. The 32 most-significant bits are returned in msb.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">genUType</td><td>Unsigned integer scalar or vector 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/umulExtended.xml">GLSL umulExtended man page</a> </dd>
<dd>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8 Integer Functions</a> </dd></dl>
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<td class="memname">GLM_FUNC_DECL vecType&lt;uint, P&gt; glm::usubBorrow </td>
<td>(</td>
<td class="paramtype">vecType&lt; uint, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>x</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">vecType&lt; uint, P &gt; const &amp;&#160;</td>
<td class="paramname"><em>y</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">vecType&lt; uint, P &gt; &amp;&#160;</td>
<td class="paramname"><em>borrow</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
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<p>Subtracts the 32-bit unsigned integer y from x, returning the difference if non-negative, or pow(2, 32) plus the difference otherwise. </p>
<p>The value borrow is set to 0 if x &gt;= y, or to 1 otherwise.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">genUType</td><td>Unsigned integer scalar or vector 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/usubBorrow.xml">GLSL usubBorrow man page</a> </dd>
<dd>
<a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8 Integer Functions</a> </dd></dl>
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