
CHANGELOG FOR 1.21 (since 1.20)
===============================

(Date: MARCH 28th 2000)

(Unreleased EDGE version)

Bugs fixed:

 - the infamous DJGPP free() crash.
 - textures lacking some texture columns no longer crash the engine.
 - an 'invalid x87 operation' bug caused by uninitialised mem.
 - problems with liquids eating other floors (etc) when moving fixed.
 - DDF/RTS errors now show the contents of the line.
 - textures getting out of sync on switches pressed quickly fixed.
 - starting the game with no weapons now works again.
 - the bug causing missing mid-masked textures in non-Truebsp fixed.
 - alignment of mid-masked textures should be OK in all renderers.
 - GL code now draws non-power-of-2 textures and mid-masked textures.
 - fixed keyboard handling in linux/GL code.
 - fixed textures inadvertently turning odd colours in GL renderer.
 - disappearing walls (at edge of screen) in the GL renderer fixed.
 - issues with translucency in the GL code fixed.
 - SHADOW sprites now supported by the GL code (different though).
 - most problems with MLOOK in the GL code have been rectified.
 
Changes:

 - the VOLUME field of sounds.ddf now uses a percentage.

 - the GRAVITY field of sectors.ddf and lines.ddf now accepts floating
   point values (like 0.5).  The values may be different too, I'm not
   sure what the old value for "normal" gravity was, but the new value
   for normal gravity is 8.0 (or just 8 if you prefer).

 - ACCURACY_ANGLE and ACCURACY_SLOPE are a bit different, now they are
   the absolute maximum error that can occur.  Current values will
   need increasing (I think multiply by 2, but I'm not sure).
 
 - EXTRAFLOOR has changed, and should be considered a moving target
   since I'm not 100% sure yet how it ought to be, but what it changed
   to will be pretty close.  The EXTRAFLOOR and EXTRAFLOOR_SPECIAL
   fields of lines.ddf have been merged into one new field:
   EXTRAFLOOR_TYPE=...  Some examples:

     before:
       EXTRAFLOOR=LIQUID;
       EXTRAFLOOR_SPECIAL=WATER,FLOODER;

     after:
       EXTRAFLOOR_TYPE=LIQUID,WATER,FLOODER;

     before:
       EXTRAFLOOR=THICK;
       EXTRAFLOOR_SPECIAL=SIDE_UPPER;

     after:
       EXTRAFLOOR_TYPE=THICK,SIDE_UPPER;
   
   It is a comma-separated list of tags.  You specify the main type
   (THIN, THICK or LIQUID) and then any other modifiers you want, like
   WATER, FLOODER, SEE_THROUGH, SHOOT_THROUGH, SIDE_UPPER, etc...

   Shootable glass has not been implemented yet, but when it is, you
   will use this:

     EXTRAFLOOR_TYPE=THICK, SEE_THROUGH, ...;
   
   Similiarly liquid boxes (with sides) have not been implemented yet,
   but will look like this:

     EXTRAFLOOR_TYPE=LIQUID, THICK, ...;

   Note that the "LIQUID" tag implies SEE_THROUGH and SHOOT_THROUGH.
   If you wanted a liquid that cannot be shot through, you would have
   to type this:

     EXTRAFLOOR_TYPE=LIQUID, NO_SHOOT_THROUGH, ...;

   (that's the reason I'm not entirely happy with this system).

   Note too that the SEE_THROUGH tag now means players as well as
   monsters -- only extrafloors which have this tag (explicitly or
   implicity via LIQUID) can be translucent, otherwise an error will
   occur.

New features:

 - the linux port now has music code, mostly complete.

 - the linux port now has sound code -- preliminary though.
 
 - VISCOSITY field can now be used in lines.ddf.  It works like the
   GRAVITY and FRICTION fields that were already available: transfers
   the new viscosity into the tagged sector.
 
