%PDF- %PDF-
Mini Shell

Mini Shell

Direktori : /usr/share/doc/imath-devel/html/functions/
Upload File :
Create Path :
Current File : //usr/share/doc/imath-devel/html/functions/random.html


<!doctype html>

<html>
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Random Numbers &#8212; Imath Documentation</title>
    <link rel="stylesheet" href="../_static/pygments.css" type="text/css" />
    <link rel="stylesheet" href="../_static/bizstyle.css" type="text/css" />
    
    <script id="documentation_options" data-url_root="../" src="../_static/documentation_options.js"></script>
    <script src="../_static/jquery.js"></script>
    <script src="../_static/underscore.js"></script>
    <script src="../_static/doctools.js"></script>
    <script async="async" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.7/latest.js?config=TeX-AMS-MML_HTMLorMML"></script>
    <script src="../_static/bizstyle.js"></script>
    <link rel="index" title="Index" href="../genindex.html" />
    <link rel="search" title="Search" href="../search.html" />
    <link rel="next" title="Roots" href="roots.html" />
    <link rel="prev" title="Matrix Functions" href="matrix.html" />
    <meta name="viewport" content="width=device-width,initial-scale=1.0" />
    <!--[if lt IE 9]>
    <script src="_static/css3-mediaqueries.js"></script>
    <![endif]-->
  </head><body>
    <div class="related" role="navigation" aria-label="related navigation">
      <h3>Navigation</h3>
      <ul>
        <li class="right" style="margin-right: 10px">
          <a href="../genindex.html" title="General Index"
             accesskey="I">index</a></li>
        <li class="right" >
          <a href="roots.html" title="Roots"
             accesskey="N">next</a> |</li>
        <li class="right" >
          <a href="matrix.html" title="Matrix Functions"
             accesskey="P">previous</a> |</li>
        <li class="nav-item nav-item-0"><a href="../index.html">Imath</a> &#187;</li>
        <li class="nav-item nav-item-this"><a href="">Random Numbers</a></li> 
      </ul>
    </div>  

    <div class="document">
      <div class="documentwrapper">
        <div class="bodywrapper">
          <div class="body" role="main">
            
  <div class="section" id="random-numbers">
<span id="random-number-functions"></span><h1>Random Numbers<a class="headerlink" href="#random-numbers" title="Permalink to this headline">¶</a></h1>
<p>Functions to compute pseudo-random numbers.</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="c1">#include &lt;Imath/ImathRandom.h&gt;</span>
</pre></div>
</div>
<dl class="cpp function">
<dt id="_CPPv4I00EN5Imath15solidSphereRandE3VecR4Rand">
<span id="_CPPv3I00EN5Imath15solidSphereRandER4Rand"></span><span id="_CPPv2I00EN5Imath15solidSphereRandER4Rand"></span>template&lt;class <code class="sig-name descname">Vec</code>, class <code class="sig-name descname">Rand</code>&gt;<br /><span class="target" id="_imath_random_8h_1a728165955aab4514228f3dd575989708"></span><a class="reference internal" href="#_CPPv4I00EN5Imath15solidSphereRandE3VecR4Rand" title="Imath::solidSphereRand::Vec">Vec</a> <code class="sig-prename descclassname">Imath<code class="sig-prename descclassname">::</code></code><code class="sig-name descname">solidSphereRand</code><span class="sig-paren">(</span><a class="reference internal" href="#_CPPv4I00EN5Imath15solidSphereRandE3VecR4Rand" title="Imath::solidSphereRand::Rand">Rand</a> &amp;<em>rand</em><span class="sig-paren">)</span><a class="headerlink" href="#_CPPv4I00EN5Imath15solidSphereRandE3VecR4Rand" title="Permalink to this definition">¶</a><br /></dt>
<dd><p>Return random points uniformly distributed in a sphere with radius 1 around the origin (distance from origin &lt;= 1). </p>
</dd></dl>

<dl class="cpp function">
<dt id="_CPPv4I00EN5Imath16hollowSphereRandE3VecR4Rand">
<span id="_CPPv3I00EN5Imath16hollowSphereRandER4Rand"></span><span id="_CPPv2I00EN5Imath16hollowSphereRandER4Rand"></span>template&lt;class <code class="sig-name descname">Vec</code>, class <code class="sig-name descname">Rand</code>&gt;<br /><span class="target" id="_imath_random_8h_1a47224d5f3bb441f8189380796c124515"></span><a class="reference internal" href="#_CPPv4I00EN5Imath16hollowSphereRandE3VecR4Rand" title="Imath::hollowSphereRand::Vec">Vec</a> <code class="sig-prename descclassname">Imath<code class="sig-prename descclassname">::</code></code><code class="sig-name descname">hollowSphereRand</code><span class="sig-paren">(</span><a class="reference internal" href="#_CPPv4I00EN5Imath16hollowSphereRandE3VecR4Rand" title="Imath::hollowSphereRand::Rand">Rand</a> &amp;<em>rand</em><span class="sig-paren">)</span><a class="headerlink" href="#_CPPv4I00EN5Imath16hollowSphereRandE3VecR4Rand" title="Permalink to this definition">¶</a><br /></dt>
<dd><p>Return random points uniformly distributed on the surface of a sphere with radius 1 around the origin. </p>
</dd></dl>

<dl class="cpp function">
<dt id="_CPPv4I00EN5Imath15gaussSphereRandE3VecR4Rand">
<span id="_CPPv3I00EN5Imath15gaussSphereRandER4Rand"></span><span id="_CPPv2I00EN5Imath15gaussSphereRandER4Rand"></span>template&lt;class <code class="sig-name descname">Vec</code>, class <code class="sig-name descname">Rand</code>&gt;<br /><span class="target" id="_imath_random_8h_1acacc168a034c5f7e28a1ba0c2cb2efe6"></span><a class="reference internal" href="#_CPPv4I00EN5Imath15gaussSphereRandE3VecR4Rand" title="Imath::gaussSphereRand::Vec">Vec</a> <code class="sig-prename descclassname">Imath<code class="sig-prename descclassname">::</code></code><code class="sig-name descname">gaussSphereRand</code><span class="sig-paren">(</span><a class="reference internal" href="#_CPPv4I00EN5Imath15gaussSphereRandE3VecR4Rand" title="Imath::gaussSphereRand::Rand">Rand</a> &amp;<em>rand</em><span class="sig-paren">)</span><a class="headerlink" href="#_CPPv4I00EN5Imath15gaussSphereRandE3VecR4Rand" title="Permalink to this definition">¶</a><br /></dt>
<dd><p>Return random points whose distance from the origin has a normal (Gaussian) distribution with zero mean and unit variance. </p>
</dd></dl>

<dl class="cpp function">
<dt id="_CPPv4I0EN5Imath9gaussRandEfR4Rand">
<span id="_CPPv3I0EN5Imath9gaussRandER4Rand"></span><span id="_CPPv2I0EN5Imath9gaussRandER4Rand"></span>template&lt;class <code class="sig-name descname">Rand</code>&gt;<br /><span class="target" id="_imath_random_8h_1adce42f5564e474038333702a07c0f8c3"></span>float <code class="sig-prename descclassname">Imath<code class="sig-prename descclassname">::</code></code><code class="sig-name descname">gaussRand</code><span class="sig-paren">(</span><a class="reference internal" href="#_CPPv4I0EN5Imath9gaussRandEfR4Rand" title="Imath::gaussRand::Rand">Rand</a> &amp;<em>rand</em><span class="sig-paren">)</span><a class="headerlink" href="#_CPPv4I0EN5Imath9gaussRandEfR4Rand" title="Permalink to this definition">¶</a><br /></dt>
<dd><p>Return random numbers with a normal (Gaussian) distribution with zero mean and unit variance. </p>
</dd></dl>

<dl class="cpp function">
<dt id="_CPPv4N5Imath7erand48EAL3E_t">
<span id="_CPPv3N5Imath7erand48EAL3E_t"></span><span id="_CPPv2N5Imath7erand48EA3_t"></span><span id="Imath::erand48__unsigned-shortA"></span><span class="target" id="_imath_random_8cpp_1a594f35373e91ff6bf458a21945bdfd98"></span>double <code class="sig-prename descclassname">Imath<code class="sig-prename descclassname">::</code></code><code class="sig-name descname">erand48</code><span class="sig-paren">(</span>unsigned short <em>state</em>[3]<span class="sig-paren">)</span><a class="headerlink" href="#_CPPv4N5Imath7erand48EAL3E_t" title="Permalink to this definition">¶</a><br /></dt>
<dd><p>Generate double-precision floating-point values between 0.0 and 1.0: </p>
<p>The exponent is set to 0x3ff, which indicates a value greater than or equal to 1.0, and less than 2.0. The 48 most significant bits of the significand (mantissa) are filled with pseudo-random bits generated by rand48Next(). The remaining 4 bits are a copy of the 4 most significant bits of the significand. This results in bit patterns between 0x3ff0000000000000 and 0x3fffffffffffffff, which correspond to uniformly distributed floating-point values between 1.0 and 1.99999999999999978. Subtracting 1.0 from those values produces numbers between 0.0 and 0.99999999999999978, that is, between 0.0 and 1.0-DBL_EPSILON. </p>
</dd></dl>

<dl class="cpp function">
<dt id="_CPPv4N5Imath7drand48Ev">
<span id="_CPPv3N5Imath7drand48Ev"></span><span id="_CPPv2N5Imath7drand48Ev"></span><span id="Imath::drand48"></span><span class="target" id="_imath_random_8cpp_1ac1b4990880eb2501d8188a227556a961"></span>double <code class="sig-prename descclassname">Imath<code class="sig-prename descclassname">::</code></code><code class="sig-name descname">drand48</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#_CPPv4N5Imath7drand48Ev" title="Permalink to this definition">¶</a><br /></dt>
<dd><p>Return erand48() </p>
</dd></dl>

<dl class="cpp function">
<dt id="_CPPv4N5Imath7nrand48EAL3E_t">
<span id="_CPPv3N5Imath7nrand48EAL3E_t"></span><span id="_CPPv2N5Imath7nrand48EA3_t"></span><span id="Imath::nrand48__unsigned-shortA"></span><span class="target" id="_imath_random_8cpp_1af831329f78a9cf9899a7492fe329614e"></span>long int <code class="sig-prename descclassname">Imath<code class="sig-prename descclassname">::</code></code><code class="sig-name descname">nrand48</code><span class="sig-paren">(</span>unsigned short <em>state</em>[3]<span class="sig-paren">)</span><a class="headerlink" href="#_CPPv4N5Imath7nrand48EAL3E_t" title="Permalink to this definition">¶</a><br /></dt>
<dd><p>Generate uniformly distributed integers between 0 and 0x7fffffff. </p>
</dd></dl>

<dl class="cpp function">
<dt id="_CPPv4N5Imath7lrand48Ev">
<span id="_CPPv3N5Imath7lrand48Ev"></span><span id="_CPPv2N5Imath7lrand48Ev"></span><span id="Imath::lrand48"></span><span class="target" id="_imath_random_8cpp_1ae4c805082320328fb15c35ae9fb33fbe"></span>long int <code class="sig-prename descclassname">Imath<code class="sig-prename descclassname">::</code></code><code class="sig-name descname">lrand48</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#_CPPv4N5Imath7lrand48Ev" title="Permalink to this definition">¶</a><br /></dt>
<dd><p>Return nrand48() </p>
</dd></dl>

<dl class="cpp function">
<dt id="_CPPv4N5Imath7srand48El">
<span id="_CPPv3N5Imath7srand48El"></span><span id="_CPPv2N5Imath7srand48El"></span><span id="Imath::srand48__l-i"></span><span class="target" id="_imath_random_8cpp_1aa1caeb3c23b570b36e399ef772272502"></span>void <code class="sig-prename descclassname">Imath<code class="sig-prename descclassname">::</code></code><code class="sig-name descname">srand48</code><span class="sig-paren">(</span>long int <em>seed</em><span class="sig-paren">)</span><a class="headerlink" href="#_CPPv4N5Imath7srand48El" title="Permalink to this definition">¶</a><br /></dt>
<dd></dd></dl>

</div>


            <div class="clearer"></div>
          </div>
        </div>
      </div>
      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
        <div class="sphinxsidebarwrapper">
            <p class="logo"><a href="../index.html">
              <img class="logo" src="../_static/imath-logo-blue.png" alt="Logo"/>
            </a></p>
  <h4>Previous topic</h4>
  <p class="topless"><a href="matrix.html"
                        title="previous chapter">Matrix Functions</a></p>
  <h4>Next topic</h4>
  <p class="topless"><a href="roots.html"
                        title="next chapter">Roots</a></p>
  <div role="note" aria-label="source link">
    <h3>This Page</h3>
    <ul class="this-page-menu">
      <li><a href="../_sources/functions/random.rst.txt"
            rel="nofollow">Show Source</a></li>
    </ul>
   </div>
<div id="searchbox" style="display: none" role="search">
  <h3 id="searchlabel">Quick search</h3>
    <div class="searchformwrapper">
    <form class="search" action="../search.html" method="get">
      <input type="text" name="q" aria-labelledby="searchlabel" />
      <input type="submit" value="Go" />
    </form>
    </div>
</div>
<script>$('#searchbox').show(0);</script>
        </div>
      </div>
      <div class="clearer"></div>
    </div>
    <div class="related" role="navigation" aria-label="related navigation">
      <h3>Navigation</h3>
      <ul>
        <li class="right" style="margin-right: 10px">
          <a href="../genindex.html" title="General Index"
             >index</a></li>
        <li class="right" >
          <a href="roots.html" title="Roots"
             >next</a> |</li>
        <li class="right" >
          <a href="matrix.html" title="Matrix Functions"
             >previous</a> |</li>
        <li class="nav-item nav-item-0"><a href="../index.html">Imath</a> &#187;</li>
        <li class="nav-item nav-item-this"><a href="">Random Numbers</a></li> 
      </ul>
    </div>
    <div class="footer" role="contentinfo">
        &#169; Copyright 2021, Contributors to the OpenEXR Project.
      Created using <a href="https://www.sphinx-doc.org/">Sphinx</a> 3.4.3.
    </div>
  </body>
</html>

Zerion Mini Shell 1.0