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<H4> 4.2.2.3 Value Commands </H4>
<!--docid::SEC141::-->
<P>
A value command has some value associated with it. Typing the command without
arguments will show the current value. Just type the value after the command
to change it. Using a `<SAMP>++</SAMP>' or `<SAMP>--</SAMP>' operator before the value will
increase or decrease the value with the given amount. Example:
</P><P>
<UL>
<LI>
`<SAMP>gamma</SAMP>': show current gamma value
<P>
<LI>
`<SAMP>gamma 1.5</SAMP>': set gamma to 1.5
<P>
<LI>
`<SAMP>gamma ++0.05</SAMP>': increase gamma with 0.05
<P>
<LI>
`<SAMP>gamma --0.05</SAMP>': decrease gamma with 0.05
</UL>
<P>
The following value commands are available:
</P><P>
<DL COMPACT>
<DT><CODE>db_maxpol</CODE>
<DD>Set/get the maximum number of polygons that is drawn every frame. Normally
this is set to a very high number so that this maximum is never reached
(2000000000 polygons every frame should suit everones need for the near
future :-) You can reduce this number for debugging purposes. In
combination with `<SAMP>fclear</SAMP>' and binding keys to `<SAMP>db_maxpol ++1</SAMP>' and
`<SAMP>db_maxpol --1</SAMP>' you can get the effect of drawing one polygon at a time.
<P>
<DT><CODE>db_procpol</CODE>
<DD>Set/get the maximum number of polygons that is considered by the culling
routines every frame. Normally this is set to a very high number so that
this maximum is never reached (2000000000 polygons every frame should suit
everones need for the near future :-) You can reduce this number for
debugging purposes.
<P>
<DT><CODE>db_octree</CODE>
<DD>Set/get the level of the octree to show on screen. This is useful to see
where octree nodes are. If 0 then nothing will be shown (default). If
1 then the root level will be shown. And so on. If -1 is given then all
leaves will be shown.
<P>
<DT><CODE>gamma</CODE>
<DD>Control the gamma value of the display. A gamma of 1.00 is neutral. 2.00
(for example) is lighter and 0.5 is darker. Press <KBD>g</KBD> or <KBD>SHF-g</KBD> to
experiment with this value at render time. This command corresponds with
the <CODE>-gamma</CODE> commandline option and with the GAMMA configuration
option.
<P>
<DT><CODE>fov</CODE>
<DD>Control the FOV (Field Of Vision) of the display. By default this is equal
to the height (in pixels) of the current display. Press <KBD>f</KBD> or
<KBD>SHF-f</KBD> to experiment with this value at render time. This command
corresponds with the <CODE>-fov</CODE> commandline option and with the FOV
configuration option.
<P>
<DT><CODE>fovangle</CODE>
<DD>Control the FOV (Field Of Vision) of the display in angles (degrees).
<P>
<DT><CODE>cosfact</CODE>
<DD>Control the cosinus factor (default 0) used for lighting. For details,
See section <A HREF="cs_50.html#SEC126">3.2.3 Engine Configuration</A>.
<P>
<DT><CODE>p_alpha</CODE>
<DD>Change the alpha transparency for a selected portal. You can select a
portal by clicking on it (only if it already has alpha transparency) or
else by using the `<SAMP>hi</SAMP>' command. Legal values for p_alpha are between 0
and 100.
<P>
<DT><CODE>snd_volume</CODE>
<DD>Change the master volume. Value between 0 and 1.
<P>
<DT><CODE>lod</CODE>
<DD>Change the global LOD setting for sprite. 1 is full detail, 0 is no detail
at all (i.e. you will not see the sprite). -1 is disabled. Any value
between 0 and 1 is legal. Default is 1.
</DL>
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