lots 		 x-pos y-pos x-vel y-vel
<BR>
pattern-size window-size
<BR>
x-win y-win window window-margin
<BR>
update threshold half-pattern correlation 
</TT></PRE>
<BR>
<BR>

<DL COMPACT>
<DT> 
<DD>This class defines tracking window.
</DD>
</DL>
<BR>
<BR>

<P>

<A NAME="40166"></A>
<B>:correlation</B> [method]

<DL COMPACT>
<DT> 
<DD> 
returns correlation between window-image and this image.
</DD>
</DL>
<BR>
<BR>

<A NAME="40176"></A>
<B>:grab</B> <EM>&amp;optional (x x-pos) (y y-pos) (sampling 2) </EM>[method]