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<title>Intel® Threading Building Blocks. Fractal sample</title>
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<h1 class="title">Intel® Threading Building Blocks.<br>Fractal sample</h1>
</div>
<p>
The example calculates two classical Mandelbrot fractals with different concurrency levels.
<br><br>
The application window is divided into two areas where fractals are rendered.
The example also has the console mode.
</p>
<div class="changes">
<div class="h3-alike">System Requirements</div>
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<p>
For the most up to date system requirements, see the <a href="http://software.intel.com/en-us/articles/intel-threading-building-blocks-release-notes">release notes.</a>
</p>
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<div class="h3-alike">Files</div>
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<dl>
<dt><a href="main.cpp">main.cpp</a>
<dd>Main program which parses command line options and runs the fractals calculation in GUI or Console mode.
<dt><a href="fractal.h">fractal.h</a>
<dd>Interfaces of fractal and fractal_group classes.
<dt><a href="fractal.cpp">fractal.cpp</a>
<dd>Implementations of fractal and fractal_group classes.
<dt><a href="fractal_video.h">fractal_video.h</a>
<dd>GUI mode support interface.
<dt><a href="Makefile">Makefile</a>
<dd>Makefile for building the example.
</dl>
</div>
</div>
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<div class="h3-alike">Directories</div>
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<dl>
<dt><a href="msvs/">msvs</a>
<dd>Contains Microsoft* Visual Studio* workspace for building and running the example (Windows* systems only).
<dt><a href="xcode/">xcode</a>
<dd>Contains Xcode* IDE workspace for building and running the example (macOS* systems only).
</dl>
<p>For information about the minimum supported version of IDE, see <a href="http://software.intel.com/en-us/articles/intel-threading-building-blocks-release-notes">release notes.</a></p>
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<div class="h3-alike">Build instructions</div>
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<p>General build directions can be found <a href="../../index.html">here</a>.</p>
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<div class="h3-alike">Usage</div>
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<dl>
<dt><tt>fractal <i>-h</i></tt>
<dd>Prints the help for command line options
<dt><tt>fractal [<i>n-of-threads=value</i>] [<i>n-of-frames=value</i>] [<i>max-of-iterations=value</i>] [<i>grain-size=value</i>] [<i>silent</i>] [<i>single</i>]</tt>
<dt><tt>fractal [<i>n-of-threads</i> [<i>n-of-frames</i> [<i>max-of-iterations</i> [<i>grain-size</i>]]]] [<i>silent</i>] [<i>single</i>]</tt>
<dd><i>n-of-threads</i> is the number of threads to use; a range of the form <i>low</i>[:<i>high</i>], where low and optional high are non-negative integers or 'auto' for a platform-specific default number.<br>
<i>n-of-frames</i> is a number of frames the example processes internally.<br>
<i>max-of-iterations</i> is a maximum number of the fractal iterations.<br>
<i>grain-size</i> is an optional grain size, must be a positive integer. <br>
<i>use-auto-partitioner</i> - use tbb::auto_partitioner.<br>
<i>silent</i> - no output except elapsed time.<br>
<i>single</i> - process only one fractal.<br>
<dt>To run a short version of this example, e.g., for use with Intel® Parallel Inspector:
<dd>Build a <i>debug</i> version of the example
(see the <a href="../../index.html">build instructions</a>).
<br>Run it with a small fractal iterations number and the desired number of threads, e.g., <tt>fractal 4 1 10000</tt>.
</dl>
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<div class="h3-alike">Hot keys</div>
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<p>
The following hot keys can be used in interactive execution mode when the example is compiled with the graphical user interface:
</p>
<dl>
<dt><left mouse button>
<dd>Make the fractal active
<dt><w>
<dd>Move the active fractal up
<dt><a>
<dd>Move the active fractal to the left
<dt><s>
<dd>Move the active fractal down
<dt><d>
<dd>Move the active fractal to the right
<dt><q>
<dd>Zoom in the active fractal
<dt><e>
<dd>Zoom out the active fractal
<dt><r>
<dd>Increase quality (count of iterations for each pixel) the active fractal
<dt><f>
<dd>Decrease quality (count of iterations for each pixel) the active fractal
<dt><esc>
<dd>Stop execution.
</dl>
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Intel and the Intel logo are trademarks of Intel Corporation in the U.S. and/or other countries.
<br>* Other names and brands may be claimed as the property of others.
<br>© 2020, Intel Corporation
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