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"text/html; charset=UTF-8" /><link rel=
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"text/css" href=
"opengl-man.css" /><title>mix - 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=
"mix"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>mix — linearly interpolate between two values
</p></div><div class=
"refsynopsisdiv"><h2>Declaration
</h2><div class=
"funcsynopsis"><p><code class=
"funcdef">genType
<b class=
"fsfunc">mix
</b>(
</code>genType
<var class=
"pdparam">x
</var>, genType
<var class=
"pdparam">y
</var>, genType
<var class=
"pdparam">a
</var><code>)
</code>;
</p></div><div class=
"funcsynopsis"><p><code class=
"funcdef">genType
<b class=
"fsfunc">mix
</b>(
</code>genType
<var class=
"pdparam">x
</var>, genType
<var class=
"pdparam">y
</var>, float
<var class=
"pdparam">a
</var><code>)
</code>;
</p></div><div class=
"funcsynopsis"><table border=
"0" summary=
"Function synopsis" cellspacing=
"0" cellpadding=
"0"><tr><td><code class=
"funcdef">genDType
<b class=
"fsfunc">mix
</b>(
</code></td><td>genDType
</td><td><var class=
"pdparam">x
</var>,
</td></tr><tr><td> </td><td>genDType
</td><td><var class=
"pdparam">y
</var>,
</td></tr><tr><td> </td><td>genDType
</td><td><var class=
"pdparam">a
</var><code>)
</code>;
</td></tr></table></div><div class=
"funcsynopsis"><p><code class=
"funcdef">genDType
<b class=
"fsfunc">mix
</b>(
</code>genDType
<var class=
"pdparam">x
</var>, genDType
<var class=
"pdparam">y
</var>, double
<var class=
"pdparam">a
</var><code>)
</code>;
</p></div><div class=
"funcsynopsis"><p><code class=
"funcdef">genType
<b class=
"fsfunc">mix
</b>(
</code>genType
<var class=
"pdparam">x
</var>, genType
<var class=
"pdparam">y
</var>, genBType
<var class=
"pdparam">a
</var><code>)
</code>;
</p></div><div class=
"funcsynopsis"><table border=
"0" summary=
"Function synopsis" cellspacing=
"0" cellpadding=
"0"><tr><td><code class=
"funcdef">genDType
<b class=
"fsfunc">mix
</b>(
</code></td><td>genDType
</td><td><var class=
"pdparam">x
</var>,
</td></tr><tr><td> </td><td>genDType
</td><td><var class=
"pdparam">y
</var>,
</td></tr><tr><td> </td><td>genBType
</td><td><var class=
"pdparam">a
</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>x
</code></em></span></dt><dd><p>
5 Specify the start of the range in which to interpolate.
6 </p></dd><dt><span class=
"term"><em class=
"parameter"><code>y
</code></em></span></dt><dd><p>
7 Specify the end of the range in which to interpolate.
8 </p></dd><dt><span class=
"term"><em class=
"parameter"><code>a
</code></em></span></dt><dd><p>
9 Specify the value to use to interpolate between
<em class=
"parameter"><code>x
</code></em> and
<em class=
"parameter"><code>y
</code></em>.
10 </p></dd></dl></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"description"></a><h2>Description
</h2><p>
11 <code class=
"function">mix
</code> performs a linear interpolation between
<em class=
"parameter"><code>x
</code></em>
12 and
<em class=
"parameter"><code>y
</code></em> using
<em class=
"parameter"><code>a
</code></em> to weight between them. The return value
13 is computed as follows:
14 <mml:math xmlns:
mml=
"http://www.w3.org/1998/Math/MathML" overflow=
"scroll">
16 <mml:mo lspace=
"2px" rspace=
"2px">⋅
</mml:mo>
17 <mml:mo stretchy=
"false">(
</mml:mo>
21 <mml:mo stretchy=
"false">)
</mml:mo>
24 <mml:mo lspace=
"2px" rspace=
"2px">⋅
</mml:mo>
28 For the variants of
<code class=
"function">mix
</code> where
<em class=
"parameter"><code>a
</code></em> is
<code class=
"constant">genBType
</code>,
29 elements for which
<em class=
"parameter"><code>a
</code></em>[
<span class=
"emphasis"><em>i
</em></span>] is
<code class=
"constant">false
</code>, the result for that
30 element is taken from
<em class=
"parameter"><code>x
</code></em>, and where
<em class=
"parameter"><code>a
</code></em>[
<span class=
"emphasis"><em>i
</em></span>] is
31 <code class=
"constant">true
</code>, it will be taken from
<em class=
"parameter"><code>y
</code></em>.
32 </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">mix (genType)
</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><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><th align=
"center"><span class=
"emphasis"><em>Y
</em></span></th><th align=
"center"><span class=
"emphasis"><em>Y
</em></span></th></tr><tr><th align=
"left">mix (genDType)
</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>
33 <a href=
"min.xml"><span class=
"citerefentry"><span class=
"refentrytitle">min
</span></span></a>,
34 <a href=
"max.xml"><span class=
"citerefentry"><span class=
"refentrytitle">max
</span></span></a>
35 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
36 Copyright
<span class=
"trademark"></span>©
2011 Khronos Group.
37 This material may be distributed subject to the terms and conditions set forth in
38 the Open Publication License, v
1.0,
8 June
1999.
39 <a href=
"http://opencontent.org/openpub/" target=
"_top">http://opencontent.org/openpub/
</a>.
40 </p></div></div></body></html>