scad 1.2.2

A crate for generating OpenSCAD models using rust
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<h1 class='fqn'><span class='in-band'>Function <a href='index.html'>rand</a>::<wbr><a class='fn' href=''>random</a></span><span class='out-of-band'><span id='render-detail'>
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                       [<span class='inner'>&#x2212;</span>]
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               </span><a id='src-1721' class='srclink' href='../src/rand/lib.rs.html#945-947' title='goto source code'>[src]</a></span></h1>
<pre class='rust fn'>pub fn random&lt;T:&nbsp;<a class='trait' href='../rand/trait.Rand.html' title='rand::Rand'>Rand</a>&gt;() -&gt; T</pre><div class='docblock'><p>Generates a random value using the thread-local random number generator.</p>

<p><code>random()</code> can generate various types of random things, and so may require
type hinting to generate the specific type you want.</p>

<p>This function uses the thread local random number generator. This means
that if you&#39;re calling <code>random()</code> in a loop, caching the generator can
increase performance. An example is shown below.</p>

<h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1>
<pre class='rust rust-example-rendered'>
<span class='kw'>let</span> <span class='ident'>x</span> <span class='op'>=</span> <span class='ident'>rand</span>::<span class='ident'>random</span>::<span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>();
<span class='macro'>println</span><span class='macro'>!</span>(<span class='string'>&quot;{}&quot;</span>, <span class='ident'>x</span>);

<span class='kw'>let</span> <span class='ident'>y</span> <span class='op'>=</span> <span class='ident'>rand</span>::<span class='ident'>random</span>::<span class='op'>&lt;</span><span class='ident'>f64</span><span class='op'>&gt;</span>();
<span class='macro'>println</span><span class='macro'>!</span>(<span class='string'>&quot;{}&quot;</span>, <span class='ident'>y</span>);

<span class='kw'>if</span> <span class='ident'>rand</span>::<span class='ident'>random</span>() { <span class='comment'>// generates a boolean</span>
    <span class='macro'>println</span><span class='macro'>!</span>(<span class='string'>&quot;Better lucky than good!&quot;</span>);
}<a class='test-arrow' target='_blank' href=''>Run</a></pre>

<p>Caching the thread local random number generator:</p>

<pre class='rust rust-example-rendered'>
<span class='kw'>use</span> <span class='ident'>rand</span>::<span class='ident'>Rng</span>;

<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>v</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[<span class='number'>1</span>, <span class='number'>2</span>, <span class='number'>3</span>];

<span class='kw'>for</span> <span class='ident'>x</span> <span class='kw'>in</span> <span class='ident'>v</span>.<span class='ident'>iter_mut</span>() {
    <span class='op'>*</span><span class='ident'>x</span> <span class='op'>=</span> <span class='ident'>rand</span>::<span class='ident'>random</span>()
}

<span class='comment'>// would be faster as</span>

<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>rng</span> <span class='op'>=</span> <span class='ident'>rand</span>::<span class='ident'>thread_rng</span>();

<span class='kw'>for</span> <span class='ident'>x</span> <span class='kw'>in</span> <span class='ident'>v</span>.<span class='ident'>iter_mut</span>() {
    <span class='op'>*</span><span class='ident'>x</span> <span class='op'>=</span> <span class='ident'>rng</span>.<span class='ident'>gen</span>();
}<a class='test-arrow' target='_blank' href=''>Run</a></pre>
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