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"stylesheet" type=
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"opengl-man.css" /><title>interpolateAtSample - OpenGL Shading Language (GLSL)
</title><meta name=
"generator" content=
"DocBook XSL Stylesheets V1.69.1" /></head><body><div class=
"refentry" lang=
"en" xml:
lang=
"en"><a id=
"interpolateAtSample"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>interpolateAtSample — sample a varying at the location of a specified sample
</p></div><div class=
"refsynopsisdiv"><h2>Declaration
</h2><div class=
"funcsynopsis"><table border=
"0" summary=
"Function synopsis" cellspacing=
"0" cellpadding=
"0" style=
"padding-bottom: 1em"><tr><td><code class=
"funcdef">float
<b class=
"fsfunc">interpolateAtSample
</b>(
</code></td><td>float
</td><td><var class=
"pdparam">interpolant
</var>,
</td></tr><tr><td> </td><td>int
</td><td><var class=
"pdparam">sample
</var><code>)
</code>;
</td></tr></table><table border=
"0" summary=
"Function synopsis" cellspacing=
"0" cellpadding=
"0" style=
"padding-bottom: 1em"><tr><td><code class=
"funcdef">vec2
<b class=
"fsfunc">interpolateAtSample
</b>(
</code></td><td>vec2
</td><td><var class=
"pdparam">interpolant
</var>,
</td></tr><tr><td> </td><td>int
</td><td><var class=
"pdparam">sample
</var><code>)
</code>;
</td></tr></table><table border=
"0" summary=
"Function synopsis" cellspacing=
"0" cellpadding=
"0" style=
"padding-bottom: 1em"><tr><td><code class=
"funcdef">vec3
<b class=
"fsfunc">interpolateAtSample
</b>(
</code></td><td>vec3
</td><td><var class=
"pdparam">interpolant
</var>,
</td></tr><tr><td> </td><td>int
</td><td><var class=
"pdparam">sample
</var><code>)
</code>;
</td></tr></table><table border=
"0" summary=
"Function synopsis" cellspacing=
"0" cellpadding=
"0"><tr><td><code class=
"funcdef">vec4
<b class=
"fsfunc">interpolateAtSample
</b>(
</code></td><td>vec4
</td><td><var class=
"pdparam">interpolant
</var>,
</td></tr><tr><td> </td><td>int
</td><td><var class=
"pdparam">sample
</var><code>)
</code>;
</td></tr></table></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"parameters"></a><h2>Parameters
</h2><div class=
"variablelist"><dl><dt><span class=
"term"><em class=
"parameter"><code>interpolant
</code></em></span></dt><dd><p>
5 Specifies the interpolant to be sampled at the location of sample
<em class=
"parameter"><code>sample
</code></em>.
6 </p></dd><dt><span class=
"term"><em class=
"parameter"><code>sample
</code></em></span></dt><dd><p>
7 Specifies the index of the sample whose location will be used to sample
<em class=
"parameter"><code>interpolant
</code></em>.
8 </p></dd></dl></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"description"></a><h2>Description
</h2><p>
9 <code class=
"function">interpolateAtSample
</code> returns the value of the input varying
<em class=
"parameter"><code>interpolant
</code></em>
10 sampled at the location of sample number
<em class=
"parameter"><code>sample
</code></em>. If multisample buffers are not available,
11 the input varying will be evaluated at the center of the pixel. If sample
<em class=
"parameter"><code>sample
</code></em> does not
12 exist, the position used to interpolate the input varying is undefined.
13 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"versions"></a><h2>Version Support
</h2><div class=
"informaltable"><table border=
"1"><colgroup><col align=
"left" /><col align=
"center" /><col align=
"center" /><col align=
"center" /><col align=
"center" /><col align=
"center" /><col align=
"center" /><col align=
"center" /><col align=
"center" /><col align=
"center" /><col align=
"center" /></colgroup><thead><tr><th align=
"left"><span class=
"bold"><strong>Function
</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
1.10</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
1.20</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
1.30</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
1.40</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
1.50</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
3.30</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
4.00</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
4.10</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
4.20</strong></span></th><th align=
"center"><span class=
"bold"><strong>Version
4.30</strong></span></th></tr><tr><th align=
"left">interpolateAtSample
</th><th align=
"center"><span class=
"emphasis"><em>-
</em></span></th><th align=
"center"><span class=
"emphasis"><em>-
</em></span></th><th align=
"center"><span class=
"emphasis"><em>-
</em></span></th><th align=
"center"><span class=
"emphasis"><em>-
</em></span></th><th align=
"center"><span class=
"emphasis"><em>-
</em></span></th><th align=
"center"><span class=
"emphasis"><em>-
</em></span></th><th align=
"center"><span class=
"emphasis"><em>Y
</em></span></th><th align=
"center"><span class=
"emphasis"><em>Y
</em></span></th><th align=
"center"><span class=
"emphasis"><em>Y
</em></span></th><th align=
"center"><span class=
"emphasis"><em>Y
</em></span></th></tr></thead></table></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"seealso"></a><h2>See Also
</h2><p>
14 <a href=
"interpolateAtCentroid.xml"><span class=
"citerefentry"><span class=
"refentrytitle">interpolateAtCentroid
</span></span></a>,
15 <a href=
"interpolateAtOffset.xml"><span class=
"citerefentry"><span class=
"refentrytitle">interpolateAtOffset
</span></span></a>
16 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
17 Copyright
<span class=
"trademark"></span>©
2011 Khronos Group.
18 This material may be distributed subject to the terms and conditions set forth in
19 the Open Publication License, v
1.0,
8 June
1999.
20 <a href=
"http://opencontent.org/openpub/" target=
"_top">http://opencontent.org/openpub/
</a>.
21 </p></div></div></body></html>