[crossfire] Lighting changes.

[Mark Wedel]

Mitch Obrian wrote:
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      One thing about light not going through walls. What if
     
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      the lightsource is under the wall? (I use this to
     
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      illuminate certain points in the underground area of
     
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      the Dark Elf lord's castle in MLAB). 
     
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      /me also uses darkness and likes the
     
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      change-to-brightness at load.... so he dosn't have to
     
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      change the files :P
     
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      Lighting looks great now, hope it goes into CVS soon.
     
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      Perhapse being able to set the light color next
     
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      (default is white... unless you set color (hexcode)?
     
     
  light sources under walls would certainly cause problems.

  Checking for light propogation would probably start checking for spaces away 
from the light source.  But if you have a case like:

----L----

  (where L is the light source, and also the place of a wall) - having light 
propogate to north, south, northwest, etc, could easily work fine.  But the 
problem is true east/west - space next would be blocked, so light wouldn't go 
there, so the wall itself wouldn't be properly lit.

  And this case may not be that uncommon, and thus hard to handle.

  However, if light values increase, this is probably something that would need 
to be fixed, even if it does break some maps.  That is because if you do have 
brighter light sources, they'd obviously go farther, and that'd probably create 
bad effects - imagine a player with a light source two rooms away illuminating 
where the player is.