179 lines
7.8 KiB
HTML
179 lines
7.8 KiB
HTML
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<title>>> (right shift) \ Language (API) \ Processing 2+</title>
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<meta name="Author" content="Processing Foundation" />
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<meta name="Publisher" content="Processing Foundation" />
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<meta name="Keywords" content="Processing, Sketchbook, Programming, Coding, Code, Art, Design" />
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<meta name="Description" content="Processing is a flexible software sketchbook and a language for learning how to code within the context of the visual arts. Since 2001, Processing has promoted software literacy within the visual arts and visual literacy within technology." />
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<meta name="Copyright" content="All contents copyright the Processing Foundation, Ben Fry, Casey Reas, and the MIT Media Laboratory" />
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<body id="Langauge-en" onload="" >
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<li class="highlight"><a href="http://processing.org/">Processing</a></li>
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<li><a href="http://p5js.org/">p5.js</a></li>
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<li><a href="http://py.processing.org/">Processing.py</a></li>
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<li><a href="http://android.processing.org/">Processing for Android</a></li>
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<a href="index.html" class='active'>Language</a><br>
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<a href="libraries/index.html" >Libraries</a><br>
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<a href="tools/index.html">Tools</a><br>
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<a href="environment/index.html">Environment</a><br>
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<script> document.querySelectorAll(".processing-logo")[0].className = "processing-logo"; </script>
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<!-- ==================================== CONTENT - Headers ============================ -->
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<div class="content">
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<p class="ref-notice">This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, <a href="https://github.com/processing/processing-docs/issues?state=open">please let us know</a>. If you prefer a more technical reference, visit the <a href="http://processing.github.io/processing-javadocs/core/">Processing Core Javadoc</a> and <a href="http://processing.github.io/processing-javadocs/libraries/">Libraries Javadoc</a>.</p>
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<table cellpadding="0" cellspacing="0" border="0" class="ref-item">
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<tr class="name-row">
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<th scope="row">Name</th>
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<td><h3>>> (right shift)</h3></td>
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</tr>
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<tr class="">
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<tr class=""><th scope="row">Examples</th><td><div class="example"><pre >
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int m = 8 >> 3; // In binary: 1000 to 1
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println(m); // Prints "1"
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int n = 256 >> 6; // In binary: 100000000 to 100
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println(n); // Prints "4"
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int o = 16 >> 3; // In binary: 10000 to 10
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println(o); // Prints "2"
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int p = 26 >> 1; // In binary: 11010 to 1101
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println(p); // Prints "13"
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</pre></div>
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<hr class="noshade" noshade="noshade" size="1">
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<div class="example"><pre >
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// Using "right shift" as a faster technique than red(), green(), and blue()
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color argb = color(204, 204, 51, 255);
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int a = (argb >> 24) & 0xFF;
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int r = (argb >> 16) & 0xFF; // Faster way of getting red(argb)
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int g = (argb >> 8) & 0xFF; // Faster way of getting green(argb)
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int b = argb & 0xFF; // Faster way of getting blue(argb)
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fill(r, g, b, a);
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rect(30, 20, 55, 55);
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</pre></div>
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</td></tr>
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<tr class="">
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<th scope="row">Description</th>
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<td>
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Shifts bits to the right. The number to the left of the operator is shifted the number of places specified by the number to the right. Each shift to the right halves the number, therefore each left shift divides the original number by 2. Use the right shift for fast divisions or to extract an individual number from a packed number. Right shifting only works with integers or numbers which automatically convert to an integer such at byte and char.
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<br /> <br />
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Bit shifting is helpful when using the <b>color</b> data type. A right shift can extract red, green, blue, and alpha values from a color. A left shift can be used to quickly reassemble a color value (more quickly than the <b>color()</b> function).
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</td>
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</tr>
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<tr class=""><th scope="row">Syntax</th><td><pre>
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value >> n
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</pre></td></tr>
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<tr class=""> <th scope="row">Parameters</th><td><table cellpadding="0" cellspacing="0" border="0"><tr class="">
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<th scope="row" class="code">value</th>
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<td>int: the value to shift</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">n</th>
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<td>int: the number of places to shift right</td>
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</tr></table></td> </tr>
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<tr class=""><th scope="row">Related</th><td><a class="code" href="leftshift.html"><< (left shift)</a><br /></td></tr>
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</table>
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Updated on April 30, 2017 02:33:23pm EDT<br /><br />
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