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"text/css" href=
"opengl-man.css" /><title>interpolateAtOffset - 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=
"interpolateAtOffset"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>interpolateAtOffset — sample a varying at specified offset from the center of a pixel
</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">interpolateAtOffset
</b>(
</code></td><td>float
</td><td><var class=
"pdparam">interpolant
</var>,
</td></tr><tr><td> </td><td>vec2
</td><td><var class=
"pdparam">offset
</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">interpolateAtOffset
</b>(
</code></td><td>vec2
</td><td><var class=
"pdparam">interpolant
</var>,
</td></tr><tr><td> </td><td>vec2
</td><td><var class=
"pdparam">offset
</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">interpolateAtOffset
</b>(
</code></td><td>vec3
</td><td><var class=
"pdparam">interpolant
</var>,
</td></tr><tr><td> </td><td>vec2
</td><td><var class=
"pdparam">offset
</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">interpolateAtOffset
</b>(
</code></td><td>vec4
</td><td><var class=
"pdparam">interpolant
</var>,
</td></tr><tr><td> </td><td>vec2
</td><td><var class=
"pdparam">offset
</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 specified offset.
6 </p></dd><dt><span class=
"term"><em class=
"parameter"><code>offset
</code></em></span></dt><dd><p>
7 Specifies the offset from the center of the pixel at which 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">interpolateAtOffset
</code> returns the value of the input varying
<em class=
"parameter"><code>interpolant
</code></em>
10 sampled at an offset from the center of the pixel specified by
<em class=
"parameter"><code>offset
</code></em>. The two floating-point
11 components of
<em class=
"parameter"><code>offset
</code></em> give the offset in pixels in the
<span class=
"emphasis"><em>x
</em></span> and
<span class=
"emphasis"><em>y
</em></span>
12 directions from the center of the pixel, respectively. An offset of (
0,
0) identifies the center of the pixel. The range and granularity of
13 offsets supported by this function is implementation-dependent.
14 </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">interpolateAtoOffset
</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>
15 <a href=
"interpolateAtCentroid.xml"><span class=
"citerefentry"><span class=
"refentrytitle">interpolateAtCentroid
</span></span></a>,
16 <a href=
"interpolateAtSample.xml"><span class=
"citerefentry"><span class=
"refentrytitle">interpolateAtSample
</span></span></a>
17 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
18 Copyright
<span class=
"trademark"></span>©
2011 Khronos Group.
19 This material may be distributed subject to the terms and conditions set forth in
20 the Open Publication License, v
1.0,
8 June
1999.
21 <a href=
"http://opencontent.org/openpub/" target=
"_top">http://opencontent.org/openpub/
</a>.
22 </p></div></div></body></html>
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