EM>:view-direction</EM> instead of <EM>:target</EM> to get the
same effect.
If you give <EM>:view-up</EM> or <EM>:view-right</EM> parameter in addition to
<EM>:target</EM> or <EM>:view-direction</EM>,
you can determine all the three rotation parameters by yourself.
</DD>
</DL>
<BR>
<BR>

<P>
             <P>

<H2><A NAME="SECTION03052000000000000000">
Projection</A>
</H2>

<P>
Class <B>parallel-projection and perspective-projection</B> process
projection transformation, which is represented with a 4X4 matri