ceph/src/boost/libs/qvm/doc/accessing_matrix_elements.html

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  14 <h1>QVM: Quaternions, Vectors, Matrices</h1>
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  16 <!-- Copyright (c) 2008-2016 Emil Dotchevski and Reverge Studios, Inc. -->
  17 <!-- Distributed under the Boost Software License, Version 1.0. (See accompanying -->
  18 <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
  19 <div class="RenoIncludeDIV"><div class="RenoAutoDIV"><h3>Accessing Matrix Elements</h3>
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  21 <div class="RenoIncludeDIV"><div class="RenoIncludeDIV"><p><span class="RenoEscape">&#35;<!--<wiki>`&#35;</wiki>--></span>include &lt;<span class="RenoLink"><a href="boost_qvm_mat_access_hpp.html">boost/qvm/mat_access.hpp</a></span>&gt;</p>
  22 <pre>namespace boost
  23 {
  24     namespace <span class="RenoLink"><a href="qvm.html">qvm</a></span>
  25     {
  26 <span class="RenoIncludeSPAN">        <span class="RenoIncludeSPAN">//Only <span class="RenoLink"><a href="SFINAE_enable_if.html">enabled if</a></span>:
  27         //  <span class="RenoLink"><a href="is_quat.html">is_quat</a></span>&lt;Q&gt;::value
  28
  29         template &lt;int R,int C,class M&gt; -unspecified-return-type- <span class="RenoLink">A</span>( M &amp; m );
  30
  31         template &lt;class M&gt; -unspecified-return-type- A00( M &amp; m );
  32         template &lt;class M&gt; -unspecified-return-type- A01( M &amp; m );
  33         ...
  34         template &lt;class M&gt; -unspecified-return-type- A09( M &amp; m );
  35         template &lt;class M&gt; -unspecified-return-type- A10( M &amp; m );
  36         ...
  37         template &lt;class M&gt; -unspecified-return-type- A99( M &amp; m );</span></span>
  38     }
  39 }</pre>
  40 </div></div><p>An expression of the form <i><span class="RenoLink">A</span>&lt;R,C&gt;(m)</i> can be used to access the element at row <i>R</i> and column <i>C</i> of a matrix object <i>m</i>. For example, the expression:</p>
  41 <pre><span class="RenoLink">A</span>&lt;4,2&gt;(m) *= 42;</pre>
  42 <p>can be used to multiply the element at row 4 and column 2 of a matrix <i>m</i> by 42.</p>
  43 <p>For convenience, there are also non-template overloads for <i>R</i> from 0 to 9 and <i>C</i> from 0 to 9; an alternative way to write the above expression is:</p>
  44 <pre>A42(m) *= 42;</pre>
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  46 See also: <span class="RenoPageList"><a href="index.html">Boost QVM</a>&nbsp;| <a href="boost_qvm_mat_access_hpp.html">boost/qvm/mat_access.hpp</a>&nbsp;| <a href="known_quirks_and_issues.html">Known Quirks and Issues</a>&nbsp;| <a href="Synopsis.html">Synopsis</a></span>
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  48 <!-- Copyright (c) 2008-2016 Emil Dotchevski and Reverge Studios, Inc. -->
  49 <!-- Distributed under the Boost Software License, Version 1.0. (See accompanying -->
  50 <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
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  55 <small>Copyright (c) 2008-2016 by Emil Dotchevski and Reverge Studios, Inc.<br/>
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