libs/qvm/doc/mat_index_write.html


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<h1>QVM: Quaternions, Vectors, Matrices</h1>
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<!-- Copyright (c) 2008-2016 Emil Dotchevski and Reverge Studios, Inc. -->
<!-- Distributed under the Boost Software License, Version 1.0. (See accompanying -->
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
<div class="RenoIncludeDIV"><div class="RenoAutoDIV"><h3>mat_index_write</h3>
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<div class="RenoIncludeDIV"><p><span class="RenoEscape">&#35;<!--<wiki>`&#35;</wiki>--></span>include &lt;<span class="RenoLink"><a href="boost_qvm_mat_index_hpp.html">boost/qvm/mat_index.hpp</a></span>&gt;</p>
<pre>namespace boost
{
    namespace <span class="RenoLink"><a href="qvm.html">qvm</a></span>
    {
<span class="RenoIncludeSPAN">        //Only <span class="RenoLink"><a href="SFINAE_enable_if.html">enabled if</a></span>:
        //  <span class="RenoLink"><a href="is_mat.html">is_mat</a></span>&lt;A&gt;::value
        template &lt;class A&gt;
        typename <span class="RenoLink"><a href="mat_traits.html">mat_traits</a></span>&lt;A&gt;::<span class="RenoLink"><a href="mat_traits_M_scalar_type.html">scalar_type</a></span> &amp;
        <span class="RenoLink">mat_index_write</span>( A &amp; a, int r, int c );</span>
    }
}</pre>
</div><h4>Returns:</h4>
<p>A mutable reference to the element of <i>a</i> at row <i>r</i> and column <i>c</i>.</p>
<h4>Preconditions:</h4>
<p><i>r &gt;= 0 &amp;&amp; r &lt; <span class="RenoLink"><a href="mat_traits.html">mat_traits</a></span>&lt;A&gt;::<span class="RenoLink"><a href="mat_traits_Matrix_rows.html">rows</a></span> &amp;&amp; c &gt;= 0 &amp;&amp; c &lt; <span class="RenoLink"><a href="mat_traits.html">mat_traits</a></span>&lt;A&gt;::<span class="RenoLink"><a href="mat_traits_Matrix_cols.html">cols</a></span></i>.</p>
<h4>Note:</h4>
<p>This function uses template metaprogramming and can be used even if the optional access function <i><span class="RenoLink"><a href="mat_traits.html">mat_traits</a></span>&lt;A&gt;::<span class="RenoLink"><a href="mat_traits_M_write_element_idx.html">write_element_idx</a></span></i> is not available.</p>
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See also: <span class="RenoPageList"><a href="boost_qvm_mat_index_hpp.html">boost/qvm/mat_index.hpp</a></span>
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