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<?xml version="1.0"?>
<!DOCTYPE ladspa SYSTEM "ladspa-swh.dtd">
<?xml-stylesheet href="ladspa.css" type="text/css"?>
<ladspa>
<global>
<meta name="maker" value="Steve Harris <steve@plugin.org.uk>"/>
<meta name="copyright" value="GPL"/>
<meta name="properties" value="HARD_RT_CAPABLE"/>
</global>
<plugin label="waveTerrain" id="1412" class="OscillatorPlugin">
<name>Wave Terrain Oscillator</name>
<p>A Wave Terrain oscillator, taken from Curtis Roads' example in {\em The Computer Music Tutorial}.</p>
<p>Inputs x and y move the cursor around on a 2D landscape "wavetable" that is used to generate the output. The function used is z = (x - y) * (x - 1) * (x + 1) * (y - 1) * (y + 1).</p>
<callback event="run"><![CDATA[
unsigned long pos;
float x, y;
for (pos = 0; pos < sample_count; pos++) {
x = xb[pos];
y = yb[pos];
zb[pos] = (x - y) * (x - 1.0f) * (x + 1.0f) * (y - 1.0f) * (y + 1.0f);
}
]]></callback>
<port label="xb" dir="input" type="audio" hint="default_0">
<name>x</name>
</port>
<port label="yb" dir="input" type="audio" hint="default_0">
<name>y</name>
</port>
<port label="zb" dir="output" type="audio">
<name>z</name>
</port>
</plugin>
</ladspa>
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