wcoords) 
</TT></PRE>
<BR>
<BR>

<DL COMPACT>
<DT> 
<DD>defines the viewing transformation.
</DD>
</DL>
<BR>
<BR>

<P>

<A NAME="36271"></A>
<B>:viewpoint</B> [method]

<DL COMPACT>
<DT> 
<DD> 
returns the position vector of the origin of this viewing.
</DD>
</DL>
<BR>
<BR>

<P>

<A NAME="36281"></A>
<B>:view-direction</B> [method]

<DL COMPACT>
<DT> 
<DD> 
returns the vector from the origin of the viewing to the center of screen.
This is the z-axis direction of the viewing coordinates.
</DD>
</DL>
<BR>
<BR