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<h2>
<span class="refentrytitle">wterrain</span>
</h2>
<p>wterrain —
A simple wave-terrain synthesis opcode.
</p>
</div>
<div class="refsect1">
<a id="idm281472868219064"></a>
<h2>Description</h2>
<p>
A simple wave-terrain synthesis opcode.
</p>
</div>
<div class="refsect1">
<a id="idm281472868217736"></a>
<h2>Syntax</h2>
<pre class="synopsis">aout <span class="command"><strong>wterrain</strong></span> kamp, kpch, k_xcenter, k_ycenter, k_xradius, k_yradius, \
itabx, itaby</pre>
</div>
<div class="refsect1">
<a id="idm281472868153080"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>itabx, itaby</em></span> -- The two tables that define the terrain.
</p>
</div>
<div class="refsect1">
<a id="idm281472868151336"></a>
<h2>Performance</h2>
<p>
The output is the result of drawing an ellipse with axes <span class="emphasis"><em>k_xradius</em></span> and <span class="emphasis"><em>k_yradius</em></span> centered at (<span class="emphasis"><em>k_xcenter</em></span>, <span class="emphasis"><em>k_ycenter</em></span>), and traversing it at frequency <span class="emphasis"><em>kpch</em></span>.
</p>
</div>
<div class="refsect1">
<a id="idm281472868147896"></a>
<h2>Examples</h2>
<p>
Here is an example of the wterrain opcode. It uses the file <a class="ulink" href="examples/wterrain.csd" target="_top"><em class="citetitle">wterrain.csd</em></a>.
</p>
<div class="example">
<a id="idm281472868146040"></a>
<p class="title">
<strong>Example 1136. Example of the wterrain 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>
<div class="refsect1">
<a id="idm281472709635448"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
<span class="c1">; Select audio/midi flags here according to platform</span>
<span class="c1">; Audio out Audio in No messages</span>
-odac -iadc -d <span class="c1">;;;RT audio I/O</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o wterrain.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="c1">; Initialize the global variables.</span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="vg">kr</span> <span class="o">=</span> <span class="mi">4410</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">10</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">1</span>
<span class="kd">instr</span> <span class="nf">1</span>
k<span class="n">dclk</span> <span class="nb">linseg</span> <span class="mi">0</span><span class="p">,</span> <span class="mf">0.01</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="nb">p3</span><span class="o">-</span><span class="mf">0.02</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">0.01</span><span class="p">,</span> <span class="mi">0</span>
k<span class="n">cx</span> <span class="nb">line</span> <span class="mf">0.1</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mf">1.9</span>
k<span class="n">rx</span> <span class="nb">linseg</span> <span class="mf">0.1</span><span class="p">,</span> <span class="nb">p3</span><span class="o">/</span><span class="mi">2</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">,</span> <span class="nb">p3</span><span class="o">/</span><span class="mi">2</span><span class="p">,</span> <span class="mf">0.1</span>
k<span class="n">pch</span> <span class="nb">line</span> <span class="nb">cpspch</span><span class="p">(</span><span class="nb">p4</span><span class="p">),</span> <span class="nb">p3</span><span class="p">,</span> <span class="nb">p5</span> <span class="o">*</span> <span class="nb">cpspch</span><span class="p">(</span><span class="nb">p4</span><span class="p">)</span>
a<span class="n">1</span> <span class="nb">wterrain</span> <span class="mi">10000</span><span class="p">,</span> k<span class="n">pch</span><span class="p">,</span> k<span class="n">cx</span><span class="p">,</span> k<span class="n">cx</span><span class="p">,</span> <span class="o">-</span>k<span class="n">rx</span><span class="p">,</span> k<span class="n">rx</span><span class="p">,</span> <span class="nb">p6</span><span class="p">,</span> <span class="nb">p7</span>
a<span class="n">1</span> <span class="nb">dcblock</span> a<span class="n">1</span>
<span class="nb">out</span> a<span class="n">1</span><span class="o">*</span>k<span class="n">dclk</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">f</span><span class="mi">1</span> <span class="mi">0</span> <span class="mi">8192</span> <span class="mi">10</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mf">0.33</span> <span class="mi">0</span> <span class="mf">0.2</span> <span class="mi">0</span> <span class="mf">0.14</span> <span class="mi">0</span> <span class="mf">0.11</span>
<span class="nb">f</span><span class="mi">2</span> <span class="mi">0</span> <span class="mi">4096</span> <span class="mi">10</span> <span class="mi">1</span>
<span class="nb">i</span><span class="mi">1</span> <span class="mi">0</span> <span class="mi">4</span> <span class="mf">7.00</span> <span class="mi">1</span> <span class="mi">1</span> <span class="mi">1</span>
<span class="nb">i</span><span class="mi">1</span> <span class="mi">4</span> <span class="mi">4</span> <span class="mf">6.07</span> <span class="mi">1</span> <span class="mi">1</span> <span class="mi">2</span>
<span class="nb">i</span><span class="mi">1</span> <span class="mi">8</span> <span class="mi">8</span> <span class="mf">6.00</span> <span class="mi">1</span> <span class="mi">2</span> <span class="mi">2</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
</p>
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<div class="refsect1">
<a id="idm281472868141816"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Matthew Gillard</td>
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<td>New in version 4.19</td>
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