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<div class="refentry" title="xscanmap">
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<h2>
<span class="refentrytitle">xscanmap</span>
</h2>
<p>xscanmap —
Allows the position and velocity of a node in a scanned process to be read.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp54331720"></a>
<h2>Description</h2>
<p>
Allows the position and velocity of a node in a scanned process to be read.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp54318520"></a>
<h2>Syntax</h2>
<pre class="synopsis">kpos, kvel <span class="command"><strong>xscanmap</strong></span> iscan, kamp, kvamp [, iwhich]</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp54319576"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>iscan</em></span> -- which scan process to read
</p>
<p>
<span class="emphasis"><em>iwhich</em></span> (optional) -- which node to sense. The default is 0.
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp54370064"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kamp</em></span> -- amount to amplify the <span class="emphasis"><em>kpos</em></span> value.
</p>
<p>
<span class="emphasis"><em>kvamp</em></span> -- amount to amplify the <span class="emphasis"><em>kvel</em></span> value.
</p>
<p>
The internal state of a node is read. This includes its position and velocity. They are amplified by the <span class="emphasis"><em>kamp</em></span> and <span class="emphasis"><em>kvamp</em></span> values.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp54372528"></a>
<h2>Examples</h2>
<p>
Here is an example of the xscanmap opcode. It uses the file <a class="ulink" href="examples/xscanmap.csd" target="_top"><em class="citetitle">xscanmap.csd</em></a>.
</p>
<div class="example">
<a id="idp54373512"></a>
<p class="title">
<strong>Example 1002. Example of the xscanmap 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>
-odac <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o xscanmap.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
<span class="comment">;the matrices can be found in /manual/examples</span>
<span class="oblock">instr</span> 1 <span class="comment">; Plain scanned syntnesis</span>
<span class="comment">; note - scanu display is turned off</span>
a0 <span class="op">=</span> 0
<span class="opc">xscanu</span> 1, .01, 6, 2, "128<span class="op">-</span>stringcircularX", 4, 5, 2, .1, .1, <span class="op">-</span>.01, .1, .5, 0, 0, a0, 0, 0
a1 <span class="opc">xscans</span> p4, <span class="opc">cpspch</span>(p5), 7, 0, 3
k1,k2 <span class="opc">xscanmap</span> 0, 1000, 1000, 64
<span class="opc">display</span> k1, .25 <span class="comment">; note - display is updated every second</span>
<span class="opc">outs</span> a1, a1
<span class="oblock">endin</span>
<span class="oblock">instr</span> 2 <span class="comment">; Scan synthesis with audio injection and dual scan paths</span>
<span class="comment">; note - scanu display is turned off</span>
ain <span class="opc">diskin2</span> "fox.wav",1,0,1
ain <span class="opc">in</span>
a0 <span class="op">=</span> ain<span class="op">/</span>10000
<span class="opc">xscanu</span> 1, .01, 6, 2, "128,8<span class="op">-</span>gridX", 14, 5, 2, .01, .05, <span class="op">-</span>.05, .1, .5, 0, 0, a0, 0, 0
a1 <span class="opc">xscans</span> p4, <span class="opc">cpspch</span>(p5), 7, 0, 2
a2 <span class="opc">xscans</span> p4, <span class="opc">cpspch</span>(p6), 77, 0, 3
k1,k2 <span class="opc">xscanmap</span> 0, 1000, 1000, 127
<span class="opc">display</span> k2, .5 <span class="comment">; note - display is updated ever 500ms</span>
<span class="opc">outs</span> a1,a2
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; Initial condition</span>
<span class="comment">;f1 0 16 7 0 8 1 8 0</span>
<span class="stamnt">f</span>1 0 128 7 0 64 1 64 0
<span class="comment">; Masses</span>
<span class="stamnt">f</span>2 0 128 -7 1 128 1
<span class="comment">; Centering force</span>
<span class="stamnt">f</span>4 0 128 -7 0 128 2
<span class="stamnt">f</span>14 0 128 -7 2 64 0 64 2
<span class="comment">; Damping</span>
<span class="stamnt">f</span>5 0 128 -7 1 128 1
<span class="comment">; Initial velocity</span>
<span class="stamnt">f</span>6 0 128 -7 -.0 128 .0
<span class="comment">; Trajectories</span>
<span class="stamnt">f</span>7 0 128 -5 .001 128 128
<span class="stamnt">f</span>77 0 128 -23 "128-spiral-8,16,128,2,1over2"
<span class="comment">; Sine</span>
<span class="stamnt">f</span>9 0 1024 10 1
<span class="comment">;--------------------------------</span>
<span class="comment">; Note list</span>
<span class="stamnt">i</span>1 0 10 .9 7.00
<span class="stamnt">s</span>
<span class="stamnt">i</span>2 0 10 1 8.00 6.00
<span class="stamnt">i</span>2 0 10 1 7.00 8.05
<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="See Also">
<a id="idp54375792"></a>
<h2>See Also</h2>
<p>
More information on Scanned Synthesis (as well as several other matrices) is available on the <a class="ulink" href="http://www.csounds.com/scanned/" target="_top"><em class="citetitle">Scanned Synthesis page</em></a> at cSounds.com.
</p>
<p> Also an article on these opcodes: <a class="ulink" href="http://www.csounds.com/stevenyi/scanned/yi_scannedSynthesis.html" target="_top"><em class="citetitle">http://www.csounds.com/stevenyi/scanned/yi_scannedSynthesis.html</em></a> , written by Steven Yi </p>
</div>
<div class="refsect1" title="Credits">
<a id="idp54377736"></a>
<h2>Credits</h2>
<p>Author: John ffitch</p>
<p>New in version 4.20</p>
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