<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>cell</title>
<link rel="stylesheet" type="text/css" href="csound.css" />
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1" />
<link rel="home" href="index.html" title="The Canonical Csound Reference Manual" />
<link rel="up" href="OpcodesTop.html" title="Orchestra Opcodes and Operators" />
<link rel="prev" href="ceil.html" title="ceil" />
<link rel="next" href="cent.html" title="cent" />
</head>
<body>
<div class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">cell</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="ceil.html">Prev</a> </td>
<th width="60%" align="center">Orchestra Opcodes and Operators</th>
<td width="20%" align="right"> <a accesskey="n" href="cent.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="refentry" title="cell">
<a id="cell"></a>
<div class="titlepage"></div>
<a id="IndexCell" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">cell</span>
</h2>
<p>cell —
Cellular Automaton
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp15295200"></a>
<h2>Description</h2>
<p>
One-Dimensional Cellular Automaton. This opcode is the
modified version of <span class="emphasis"><em>vcella</em></span> by Gabriel Maldonado.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp15296128"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>cell</strong></span> ktrig, kreinit, ioutFunc, initStateFunc, iRuleFunc, ielements</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp15306528"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ioutFunc</em></span> -- number of the table where the state of each cell is stored.
</p>
<p>
<span class="emphasis"><em>initStateFunc</em></span> -- number of the table
containing the inital states of cells.
</p>
<p>
<span class="emphasis"><em>iRuleFunc</em></span> -- number of a lookup table
containing the 8-bit rule.
</p>
<p>
<span class="emphasis"><em>ielements</em></span> -- total number of cells in a row.
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp15308776"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>ktri</em></span> -- trigger signal. Each time it is
non-zero, a new generation of cells is evaluated.
</p>
<p>
<span class="emphasis"><em>kreinit</em></span> -- reset signal. Each time it is
non-zero, state of all cells is forced to be that of
initStateFunc.
</p>
<p>
<span class="emphasis"><em>cell</em></span> models a classical 1D cellular
automaton and stores the state of each cell in the table
identified by <span class="emphasis"><em>ioutFunc</em></span>.
</p>
<p>
<span class="emphasis"><em>initStateFunc</em></span> is an input vector containing
the inital value of the row of cells, while
<span class="emphasis"><em>iRuleFunc</em></span> is an input vector containing the
chosen rule in the binary form (least significant bit first).
</p>
<p>
A new generation of cells is evaluated each time
<span class="emphasis"><em>ktrig</em></span> contains a non-zero value. Also the
status of all cells can be forced to assume the status
corresponding to the contents of
<span class="emphasis"><em>initStateFunc</em></span> each time
<span class="emphasis"><em>kreinit</em></span> contains a non-zero value.
</p>
<p>
Note that each cell is supposed to be in one of two possible
states (1 = "alive", 0 = "dead"), although fractional values
should work too, because truncation is used.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp15344272"></a>
<h2>Examples</h2>
<p>
Here is a simple example of the cell opcode. It uses the file
<a class="ulink" href="examples/cell.csd" target="_top"><em class="citetitle">cell.csd</em></a>.
</p>
<div class="example">
<a id="idp15345248"></a>
<p class="title">
<strong>Example 94. A simple example of the cell opcode.</strong>
</p>
<div class="example-contents">
<p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
<span class="comment">; Select audio/midi flags here according to platform</span>
<span class="comment">;-odac -iadc ;;;RT audio I/O</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o cell.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="comment">; cell.csd by Gleb Rogozinsky</span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">kr</span> <span class="op">=</span> 4410
<span class="ohdr">ksmps</span> <span class="op">=</span> 10
<span class="ohdr">nchnls</span> <span class="op">=</span> 1
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
<span class="comment">; Cellular automaton-driven synthesis in spectral domain</span>
<span class="oblock">instr</span> 1
iatt <span class="op">=</span> p4 <span class="comment">; envelope attack time</span>
isus <span class="op">=</span> p5 <span class="comment">; envelope sustain time</span>
irel <span class="op">=</span> p6 <span class="comment">; envelope release time</span>
ivol <span class="op">=</span> p7 <span class="comment">; overall volume</span>
<span class="comment">; create some white noise</span>
asig <span class="opc">rand</span> 0.8
<span class="comment">; spectral analysis of asig</span>
fsig <span class="opc">pvsanal</span> asig, 2048, 1024, 2048, 0 <span class="comment">; get a vector of magnitudes</span>
<span class="comment">; calculate cellular automaton state</span>
kfreq <span class="opc">line</span> 50, 5, 1 <span class="comment">; variable CA triggering frequency</span>
ktrig <span class="opc">metro</span> kfreq <span class="comment">; trigger the CA to update cells</span>
<span class="opc">cell</span> ktrig, 0, 3, 1, 2, 2048 <span class="comment">; cells are written into ftable 3 </span>
<span class="comment">; use current row of cells in spectral domain</span>
fmas <span class="opc">pvstencil</span> fsig, 0, 1, 3 <span class="comment">; apply spectral mask </span>
aout <span class="opc">pvsynth</span> fmas <span class="comment">; reconstruct time signal </span>
<span class="comment">; apply envelope and out signal</span>
kenv <span class="opc">expseg</span> .001, iatt, 1, isus, 1, irel, .001
<span class="opc">out</span> aout<span class="op">*</span>kenv<span class="op">*</span>ivol
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; This example uses one-dimensional cellular automaton</span>
<span class="comment">; to produce structures in spectral domain</span>
<span class="comment">; We have to prepare initial row of cells.</span>
<span class="comment">; One alive cell is enough to produce a simple fractal,</span>
<span class="comment">; so two alivee cells will make structure more sophisticated</span>
<span class="stamnt">f</span>1 0 2048 7 0 150 0 0 1 1 1 0 0 45 0 0 1 1 1 0 0
<span class="comment">; The CA rule is used as follows:</span>
<span class="comment">; the states (values) of each cell are summed with their neighboring cells.</span>
<span class="comment">; Each sum is used as an index to read a next state of cell</span>
<span class="comment">; from the rule table.</span>
<span class="comment">; Let us try rule # 129 (LSB binary 1 0 0 0 0 0 0 1).</span>
<span class="comment">; This rule will produce a fractal structure for single active cell</span>
<span class="comment">; For more rules see http://mathworld.wolfram.com/ElementaryCellularAutomaton.html</span>
<span class="stamnt">f</span>2 0 8 -2 1 0 0 0 0 0 0 1
<span class="comment">; Try some different rules i.E. 254 (0 1 1 1 1 1 1 1) or 169 (1 0 0 1 0 1 0 1)</span>
<span class="comment">; Prepare the output table of ielements size</span>
<span class="stamnt">f</span>3 0 2048 10 0
<span class="comment">; Time to make it sound!</span>
<span class="stamnt">i</span>1 0 13 0.3 7 3 1
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp15347528"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Gleb Rogozinsky</td>
</tr>
<tr>
<td>October 2011</td>
</tr>
</table>
<p>
</p>
<p>New in Csound version 5.16.6</p>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="ceil.html">Prev</a> </td>
<td width="20%" align="center">
<a accesskey="u" href="OpcodesTop.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="cent.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">ceil </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> cent</td>
</tr>
</table>
</div>
</body>
</html>
distrib
>
Mageia
>
5
>
x86_64
>
media
>
core-release
>
by-pkgid
>
b707d9a4ee443103660a75ccb6e51334
>
files
>
414
