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<refentry id="pindex">
<indexterm id="IndexPindex"><primary>pindex</primary></indexterm>
<refentryinfo><title>Instrument Control:Sensing and Control</title></refentryinfo>
<refmeta>
<refentrytitle>pindex</refentrytitle>
</refmeta>
<refnamediv>
<refname>pindex</refname>
<refpurpose>
Returns the value of a specified pfield.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
<emphasis>pindex</emphasis> returns the value of a specified pfield.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis>ivalue <command>pindex</command> ipfieldIndex</synopsis>
</refsect1>
<refsect1>
<title>Initialization</title>
<para>
<emphasis>ipfieldIndex</emphasis> - pfield number to query.
</para>
<para>
<emphasis>ivalue</emphasis> - value of the pfield.
</para>
</refsect1>
<!-- <refsect1>
<title>Performance</title>
</refsect1>-->
<refsect1>
<title>Examples</title>
<para>
Here is an example of the pindex opcode. It uses the file <ulink url="examples/pindex.csd"><citetitle>pindex.csd</citetitle></ulink>.
<example>
<title>Example of the pindex opcode.</title>
<para>See the sections <link linkend="UsingRealTime"><citetitle>Real-time Audio</citetitle></link> and <link linkend="CommandFlags"><citetitle>Command Line Flags</citetitle></link> for more information on using command line flags.</para>
<xi:include href="examples-xml/pindex.csd.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
</example>
</para>
<para>
The example will produce the following output:
<screen>
new alloc for instr 1:
WARNING: instr 1 uses 3 p-fields but is given 5
p1 = 1.000000
p2 = 0.000000
p3 = 3.000000
p4 = 40.000000
p5 = 50.000000
instr 1: inum = 5.000
B 0.000 .. 1.000 T 1.000 TT 1.000 M: 0.0
new alloc for instr 1:
WARNING: instr 1 uses 3 p-fields but is given 5
p1 = 1.000000
p2 = 1.000000
p3 = 2.000000
p4 = 80.000000
p5 = 50.000000
instr 1: inum = 5.000
B 1.000 .. 2.000 T 2.000 TT 2.000 M: 0.0
new alloc for instr 1:
WARNING: instr 1 uses 3 p-fields but is given 7
p1 = 1.000000
p2 = 2.000000
p3 = 1.000000
p4 = 40.000000
p5 = 50.000000
p6 = 60.000000
p7 = 70.000000
instr 1: inum = 7.000
</screen>
The warnings can be ignored, because the pfields are used indirectly through pindex instead of explicitly through p4, p5, etc.
</para>
<para>
Here is another example of the pindex opcode. It uses the file <ulink url="examples/pindex-2.csd"><citetitle>pindex-2.csd</citetitle></ulink>.
<example>
<title>Second example of the pindex opcode.</title>
<xi:include href="examples-xml/pindex-2.csd.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
</example>
</para>
<para>
The example will produce the following output:
<screen>
WARNING: instr 1 uses 3 p-fields but is given 8
B 0.000 .. 2.000 T 2.000 TT 2.000 M: 0.49966 0.49966
WARNING: instr 1 uses 3 p-fields but is given 10
B 2.000 .. 4.000 T 4.000 TT 4.000 M: 0.50000 0.50000
WARNING: instr 1 uses 3 p-fields but is given 10
B 4.000 .. 6.000 T 6.000 TT 6.000 M: 0.49943 0.49943
WARNING: instr 1 uses 3 p-fields but is given 6
B 6.000 .. 8.000 T 8.000 TT 8.000 M: 0.00000 0.00000
WARNING: instr 1 uses 3 p-fields but is given 20
B 8.000 .. 18.000 T 18.000 TT 18.000 M: 0.49994 0.49994
</screen>
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<link linkend="pcount"><citetitle>pcount</citetitle></link>
</para>
</refsect1>
<refsect1>
<title>Credits</title>
<para>Example by: Anthony Kozar</para>
<para>Dec. 2006</para>
</refsect1>
</refentry>
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