>
<BR>

<A NAME="36006"></A>
<B>:width</B> <EM>&amp;optional width </EM>[method]

<DL COMPACT>
<DT> 
<DD> width of this viewport.
</DD>
</DL>
<BR>
<BR>

<A NAME="36016"></A>
<B>:height</B> <EM>&amp;optional height </EM>[method]

<DL COMPACT>
<DT> 
<DD> height of this viewport.
</DD>
</DL>
<BR>
<BR>

<A NAME="36026"></A>
<B>:screen-point-to-ndc</B> <EM>p </EM>[method]

<DL COMPACT>
<DT> 
<DD> 
<EM>p</EM> is a float-vector representing the location in the physical screen.
<EM>p</EM> is transformed into the re