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    <title>Geometric Built-In Functions</title>
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    <div class="refentry">
      <a id="idm1"></a>
      <div class="titlepage"></div>
      <div xmlns="" class="refnamediv">
        <h1>Geometric Built-In Functions</h1>
        <p>Click an item in the table below for details about that function.</p>
      </div>
      <div class="refsect1">
        <a id="springboard"></a>
        <h2></h2>
        <div class="informaltable">
          <table class="informaltable" border="1">
            <colgroup>
              <col align="left" class="col1" />
              <col align="left" class="col2" />
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            <tbody>
              <tr>
                <td align="left">
                  <a class="citerefentry" href="cross.html">
                    <span class="citerefentry">
                      <span class="refentrytitle">cross</span>
                    </span>
                  </a>
                </td>
                <td align="left">Cross product</td>
              </tr>
              <tr>
                <td align="left">
                  <a class="citerefentry" href="dot.html">
                    <span class="citerefentry">
                      <span class="refentrytitle">dot</span>
                    </span>
                  </a>
                </td>
                <td align="left">Dot product</td>
              </tr>
              <tr>
                <td align="left">
                  <a class="citerefentry" href="distance.html">
                    <span class="citerefentry">
                      <span class="refentrytitle">distance</span>
                    </span>
                  </a>
                </td>
                <td align="left">Vector distance</td>
              </tr>
              <tr>
                <td align="left">
                  <a class="citerefentry" href="length.html">
                    <span class="citerefentry">
                      <span class="refentrytitle">length</span>
                    </span>
                  </a>
                </td>
                <td align="left">Vector length</td>
              </tr>
              <tr>
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                  <a class="citerefentry" href="normalize.html">
                    <span class="citerefentry">
                      <span class="refentrytitle">normalize</span>
                    </span>
                  </a>
                </td>
                <td align="left">Normal vector length 1</td>
              </tr>
              <tr>
                <td align="left">
                  <a class="citerefentry" href="fast_distance.html">
                    <span class="citerefentry">
                      <span class="refentrytitle">fast_distance</span>
                    </span>
                  </a>
                </td>
                <td align="left">Vector distance</td>
              </tr>
              <tr>
                <td align="left">
                  <a class="citerefentry" href="fast_length.html">
                    <span class="citerefentry">
                      <span class="refentrytitle">fast_length</span>
                    </span>
                  </a>
                </td>
                <td align="left">Vector length</td>
              </tr>
              <tr>
                <td align="left">
                  <a class="citerefentry" href="fast_normalize.html">
                    <span class="citerefentry">
                      <span class="refentrytitle">fast_normalize</span>
                    </span>
                  </a>
                </td>
                <td align="left">Normal vector length 1</td>
              </tr>
            </tbody>
          </table>
        </div>
      </div>
      <div class="refsect1">
        <a id="description"></a>
        <h2>Description</h2>
        <p>
			Built-in geometric functions operate component-wise and the description is per-component. The generic type name <span class="type">gentype</span> indicates that the
function can take <span class="type">float</span>, <span class="type">float2</span>, or <span class="type">float4</span>, <span class="type">float8</span> as the type for the arguments.</p>
        <p>The built-in geometric functions are implemented using the round to nearest even rounding mode.
        </p>
        <p>The geometric functions can be implemented using contractions such as <a class="citerefentry" href="mad.html"><span class="citerefentry"><span class="refentrytitle">mad</span></span></a> or <a class="citerefentry" href="fma.html"><span class="citerefentry"><span class="refentrytitle">fma</span></span></a>.
        </p>
        <p> 
		The built-in geometric functions are extended with <a class="citerefentry" href="cl_khr_fp64.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_fp64</span></span></a> to include appropriate versions of functions that take <span class="type">double</span>, and <span class="type">double{2|4|8|16}</span> as arguments and return values. They are also extended with with <a class="citerefentry" href="cl_khr_fp16.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_fp16</span></span></a> to include appropriate versions of functions that take <span class="type">half</span>, and <span class="type">half{2|4|8|16}</span> as arguments and return values. 
		</p>
      </div>
      <div class="refsect1">
        <a id="specification"></a>
        <h2>Specification</h2>
        <p>
            <img src="pdficon_small1.gif" />
                                                 
            <a href="http://www.khronos.org/registry/cl/specs/opencl-1.0.pdf#page=182" target="OpenCL Spec">OpenCL Specification</a>
        </p>
      </div>
      <div xmlns="" class="refsect3" lang="en" xml:lang="en"><a xmlns="http://www.w3.org/1999/xhtml" id="Copyright"></a><h4 xmlns="http://www.w3.org/1999/xhtml"></h4><img xmlns="http://www.w3.org/1999/xhtml" src="KhronosLogo.jpg" /><p xmlns="http://www.w3.org/1999/xhtml"></p>Copyright © 2007-2009 The Khronos Group Inc. 
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and/or associated documentation files (the
"Materials"), to deal in the Materials without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Materials, and to
permit persons to whom the Materials are furnished to do so, subject to
the condition that this copyright notice and permission notice shall be included
in all copies or substantial portions of the Materials. 
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