ake-projection</B> [method]

<DL COMPACT>
<DT> 
<DD>  
</DD>
</DL>
<BR>
<BR>

<A NAME="36531"></A>
<B>:ray</B> <EM>u v </EM>[method]

<DL COMPACT>
<DT> 
<DD> 
returns the normalized direction-vector pointing (u,v) on
the normalized screen from the viewpoint.
</DD>
</DL>
<BR>
<BR>

<A NAME="36541"></A>
<B>:viewdistance</B> <EM>&amp;optional vd </EM>[method]

<DL COMPACT>
<DT> 
<DD> 
Viewdistance is the distance between viewpoint and the screen.
If <EM>vd</EM> is given, it is set to viewdistance.
The viewdist