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+<!DOCTYPE html>
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+<html>
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+ <head>
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+ <meta charset="utf-8">
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+ <meta name="viewport" content="width=device-width, initial-scale=1">
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+ <title>Gravity: System</title>
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+ <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css" />
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+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
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+ <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:400,700,800">
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+ <link rel="stylesheet" href="scripts/highlight/styles/github-gist.css">
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+ <link rel="stylesheet" href="stylesheets/styles.css">
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+ </head>
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+ <body>
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+
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+ <!-- BEGIN NAVIGATION BAR -->
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+ <nav class="navbar navbar-default navbar-fixed-top">
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+ <div class="container">
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+ <div class="navbar-header">
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+ <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
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+ <span class="sr-only">Toggle navigation</span>
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+ <span class="icon-bar"></span>
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+ <span class="icon-bar"></span>
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+ <span class="icon-bar"></span>
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+ </button>
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+ <a class="navbar-brand" href="http://gravity-lang.org"><img src="images/logo.png" width="32px" height="36px"></a>
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+ </div>
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+ <div id="navbar" class="navbar-collapse collapse">
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+ <ul class="nav navbar-nav navbar-right">
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+ <li class="active"><a href="index.html">Gravity</a></li>
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+ <li><a href="internals/index.html">Internals</a></li>
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+ <li><a href="https://github.com/marcobambini/gravity">GitHub</a></li>
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+ </ul>
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+ </div><!--/.nav-collapse -->
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+ </div>
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+ </nav>
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+ <!-- END NAVIGATION BAR -->
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+
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+ <div class="container body-container">
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+ <div class="main-content">
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+ <div class="row">
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+
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+ <!-- BEGIN SIDEBAR -->
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+ <div class="col-sm-3 border-right section-left">
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+ <div saveheight="1" class="sidebar-nav">
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+ <h4>INTRODUCTION</h4>
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+ <ul>
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+ <li><a href="index.html"><span>Introduction</span></a></li>
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+ <li><a href="getting-started.html"><span>Getting Started</span></a></li>
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+ </ul>
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+ <h4>LANGUAGE GUIDE</h4>
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+ <ul>
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+ <li><a href="syntax.html"><span>Syntax</span></a></li>
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+ <li><a href="operators.html"><span>Operators</span></a></li>
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+ <li><a href="types.html"><span>Types</span></a></li>
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+ <li><a href="lists.html"><span>Lists</span></a></li>
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+ <li><a href="maps.html"><span>Maps</span></a></li>
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+ <li><a href="enum.html"><span>Enum</span></a></li>
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+ <li><a href="functions.html"><span>Functions</span></a></li>
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+ <li><a href="closures.html"><span>Closures</span></a></li>
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+ <li><a href="classes.html"><span>Classes</span></a></li>
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+ <li><a href="control-flow.html"><span>Control Flow</span></a></li>
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+ <li><a href="loops.html"><span>Loops</span></a></li>
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+ <li><a href="fibers.html"><span>Fibers</span></a></li>
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+ </ul>
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+ <h4>ADVANCED</h4>
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+ <ul>
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+ <li><a href="api.html"><span>Embedding API</span></a></li>
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+ <li><a href="system.html"><span>System class</span></a></li>
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+ <li><a href="math.html" class="active"><span>Math class</span></a></li>
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+ <li><a href="unit-test.html"><span>Unit test</span></a></li>
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+ <li><a href="contributing.html"><span>Contributing</span></a></li>
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+ </ul>
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+ </div>
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+ </div>
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+ <!-- END SIDEBAR -->
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+
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+ <!-- BEGIN CONTENT -->
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+ <div class="col-sm-9 border-left section-right">
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+ <h1 class="section-header">Math</h1><hr>
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+ <p class="section-content">The Math class is a class in Gravity that offers various methods for calculating more complex mathematics than the standard +,-,/, and *.</p>
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+ <h4 class="section-h4">Mathematical Constants</h4>
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+ <pre><code class="swift">
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+ Math.PI; // pi (~3.141593)
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+ Math.E; // e (~2.718282)
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+ Math.LN2; // natural log of 2 (ie. Math.log(2) = ~0.693147)
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+ Math.LN10; // natural log of 10 (ie. Math.log(10) = ~2.302585)
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+ Math.LOG2E; // log base 2 of e (~1.442695)
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+ Math.LOG10E; // log base 10 of e (~0.434294)
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+ Math.SQRT2; // sqrt of 2 (ie. Math.sqrt(2) = ~1.414214)
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+ Math.SQRT1_2; // sqrt of 0.5 (ie. Math.sqrt(0.5) = ~0.707107)
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+ </code></pre>
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+
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+ <h4 class="section-h4">Absolute Values</h4>
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+ <strong>Math.abs()</strong> is a method that returns the absolute value of an integer of float.
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+ <pre><code class="swift">
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+ Math.abs(-10); // returns 10
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+ Math.abs(10); // also returns 10
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+ </code></pre>
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+
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+ <h4 class="section-h4">Trig Functions</h4>
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+ <p>The Math class also contains several Trigonometric Functions. All
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+ values that represent angles are in radians for these methods, and they
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+ all expect radians for inputs.</p>
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+ <pre><code class="swift">
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+ Math.acos(-1); // returns pi
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+ Math.asin(0.5); // returns 0.523599 ( = pi/6)
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+ Math.atan(1); // returns 0.785398 ( = pi/4 )
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+ Math.atan2(-1,-1); // returns -2.356194 ( = -3pi/4 )
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+
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+ Math.cos(Math.PI); // returns -1
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+ Math.sin(Math.PI); // returns 0
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+ Math.tan(Math.PI/4); // returns 1
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+ </code></pre>
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+
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+ <h4 class="section-h4">Ceiling, Floor, and Rounding</h4>
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+ <pre><code class="swift">
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+ Math.ceil(4.1) // returns 5
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+ Math.floor(4.1) // returns 4
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+ Math.round(4.1) // returns 4
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+ Math.round(4.5) // returns 5
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+ </code></pre>
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+
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+ <h4 class="section-h4">Exponents and Radicals</h4>
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+ <pre><code class="swift">
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+ // e to the power of x
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+ Math.exp(1) // returns 2.718282 (e)
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+ Math.exp(2) // returns 7.389056 (e^2)
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+
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+ // x to the power of y
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+ Math.pow(2,3); // returns 8
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+
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+ Math.sqrt(9); // 3
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+ </code></pre>
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+
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+ <h4 class="section-h4">Logarithms</h4>
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+ <pre><code class="swift">
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+ // log base e
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+ Math.log(Math.E) // returns 1
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+ </code></pre>
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+
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+ <h4 class="section-h4">Max and Min</h4>
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+ <pre><code class="swift">
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+ Math.max(-1,10,2); // Returns 10
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+ Math.min(-1,10,2); // Returns -1
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+ </code></pre>
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+
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+ <h4 class="section-h4">Random Number</h4>
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+ <pre><code class="swift">
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+ Math.random() // Returns a random number between 0 and 1
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+ </code></pre>
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+ </div>
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+ <!-- END CONTENT -->
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+
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+ </div> <!-- /row -->
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+ </div> <!-- /main-content -->
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+ </div> <!-- /container -->
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+
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+ <!-- BEGIN FOOTER -->
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+ <footer class="navbar-fixed-bottom">
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+ <div class="container footer">
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+ <p>
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+ </p>
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+ </div>
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+ </footer>
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+ <!-- END FOOTER -->
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+
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+ <script>hljs.initHighlightingOnLoad();</script>
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+
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+ </body>
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+</html>
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Steven Hall