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  <refentry id="function.swf-polarview">
   <refnamediv>
    <refname>swf_polarview</refname>
    <refpurpose>
     Define the viewer's position with polar coordinates
    </refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <methodsynopsis>
      <type>void</type><methodname>swf_polarview</methodname>
      <methodparam><type>float</type><parameter>dist</parameter></methodparam>
      <methodparam><type>float</type><parameter>azimuth</parameter></methodparam>
      <methodparam><type>float</type><parameter>incidence</parameter></methodparam>
      <methodparam><type>float</type><parameter>twist</parameter></methodparam>
     </methodsynopsis>
    <para>
     The <function>swf_polarview</function> function defines the
     viewer's position in polar coordinates.  The
     <parameter>dist</parameter> parameter gives the distance between
     the viewpoint to the world space origin.  The
     <parameter>azimuth</parameter> parameter defines the azimuthal
     angle in the x,y coordinate plane, measured in distance from the
     y axis.  The <parameter>incidence</parameter> parameter defines
     the angle of incidence in the y,z plane, measured in distance
     from the z axis.  The incidence angle is defined as the angle of
     the viewport relative to the z axis.  Finally the
     <parameter>twist</parameter> specifies the amount that the
     viewpoint is to be rotated about the line of sight using the
     right hand rule.
    </para>
   </refsect1>
  </refentry>

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