- move D_LoadWadSettings to keysections.cpp.
- made some more data reloadable.
- data structures filled by P_SetupLevel should be cleared before loading the level. They can remain non-empty in case of an error. There's probably more to fix here...
- fixed: MidiDevices and MusicAliases were not cleared before reloading local SNDINFOs.
- fixed signed/unsigned warnings in AddSwitchPair for real (GCC really allows -1u? MSVC prints a warning for that.)
SVN r3036 (trunk)
* the sprite used for 'pause'.
* the factor with which a monster's health is multiplied to decide if it's supposed to be gibbed,
* the decision to make monsters run faster in nightmare mode.
- moved the hard coded lock messages for lock types 102 and 103 into the language lump.
- fixed: Raven's fast monsters could become slower in Nightmare if they had very short walking states.
SVN r2834 (trunk)
- merged all places where secrets are credited into one common function.
- added the Doom64 COUNTSECRET actor flag.
- fixed: AInventory::CreateCopy did not clear the COUNTITEM flag.
- fixed: Dropping an item did not increase the item count but the dropped item could still have the COUNTITEM flag. Now this flag gets cleared when the item gets picked up so that dropped items don't count a second time.
SVN r2826 (trunk)
- add a GetReplacement method to PClass to clean up some really ugly code
- Who wrote the 'kill' CCMD? The way it checked if two classes were identical was horrendously overcomplicated.
SVN r2601 (trunk)
- fixed: All blood spawning functions checked the ALLOWPARTICLES flag on the class defaults before actor replacement instead of after.
SVN r2563 (trunk)
- Added new sprite #### and frame character # to specify the behavior of sprite ---- on a
per-sprite and per-frame basis respectively.
SVN r2291 (trunk)
- fixed memory leaks in SBARINFO and WAD loading code.
- added GetBloodColor and GetBloodType inline functions to AActor to wrap the GetMeta calls used for this.
SVN r2234 (trunk)
they are both created by the first-stage Sigil. AlienSpectre3 should have also been
immune to them but was not. In addition, Macil1 was erroneously immune to V1, when he should
not be immune to any spectral damage. (Though, since he's immortal, all that really amounts to
is that he can enter his pain state.)
SVN r2106 (trunk)
because it exposed a design flaw in the thinker system:
Having every single actor default to the highest available statnum means that
nothing can be placed in a slot where it is guaranteed to be run after all actors
have ticked. But this is required for any thinker that moves an actor
(i.e. AActorMover and DSectorEffect.) With DSectorEffect it just went unnoticed
because they were added at the end of the list so almost nothing they moved was
behind them in a thinker list. However, when an actor was spawned on a moving
floor it did not move smoothly. The default statnum is now 100 so that there's
sufficient slots above where such thinkers can be placed.
SVN r2060 (trunk)
it happened outside the moved actor's Tick function. This got particularly
obvious with moving skybox viewpoints (See Daedalus's MAP21 intro for a good
example.)
SVN r2059 (trunk)
player does not immediately activate switches. oldbuttons was not usable
for this. This also required that CopyPlayer preserves this info.
- Fixed: When restarting the music there was a NULL pointer check missing
so it crashed when the game was started wi
- Fixed: If the Use key is used to respawn the player it must be cleared
so that it doesn't trigger any subsequent actions after respawning.
- Fixed: Resurrecting a monster did not restore flags5 and flags6.
- Fixed: Projectiles which killed a non-monster were unable to determine
what precisely they hit because MF_CORPSE is only valid for monsters.
A new flag, MF6_KILLED that gets set for all objects that die, was added
for this case.
- Added a generic A_Weave function that exposes all possible options of
A_BishopMissileWeave and A_CStaffMissileSlither. These 2 functions are
no longer needed from DECORATE and therefore deprecated.
SVN r2045 (trunk)
But that's insufficient because it doesn't factor in any subsequent velocity
change that happens between the damaging and the next call to A_FreezeDeathChunks.
- fixed: The TimeFreezer did not freeze other players' controls in a
multiplayer game.
- fixed: DECORATE's 'gravity' property incorrectly messed around with the
NOGRAVITY flag.
- fixed: Hitscan attacks didn't check the puff's replacement for damage types.
SVN r2026 (trunk)
changing game code.
- made SpawningMapThing an argument of AActor::StaticSpawn instead of a global
variable.
- added a stub to the DECORATE parser for defining dynamic lights directly
in DECORATE. This is needed so that ZDoom remains compatible with any DECORATE
which uses this GZDoom feature in the future.
SVN r1935 (trunk)
A_SetUserVar/SetUserVariable/GetUserVariable now take a variable name
instead of an array index. A_SetUserArray/SetUserArray/GetUserArray
have been added to access elements in user-defined arrays.
SVN r1933 (trunk)
- fixed: When a blasted actor collided with another one this other actor's
DONTBLAST flag was not checked.
- added a global DamageFactor actor property. All damage this actor takes is multiplied
by this factor in addition to damage type specific damage factors.
SVN r1915 (trunk)
BOUNCE_MBF and BOUNCE_UseSeeSound, too, when clearing one of these flags.
- Fixed: When adding the AVOIDMELEE code the code was accidentally changed so that
friendly monsters could no longer acquire targets by themselves.
- Renamed WIF_BOT_MELEE to WIF_MELEEWEAPON because it's no longer a bot only flag.
- Added MBF's monster_backing feature as an actor flag: AVOIDMELEE.
SVN r1848 (trunk)
- Cleaned up A_LookEx code and merged most of it with the base functions.
The major difference was a common piece of code that was repeated 5 times
throughout the code so I moved it into a subfunction.
- Changed P_BlockmapSearch to pass a user parameter to its callback so that
A_LookEx does not need to store its info inside the actor itself.
SVN r1846 (trunk)
- added thing activation types for BUMPSPECIAL and USESPECIAL. Also added
a new ClearSpecial flag to the activation type.
- added MBF's code for dogs jumping down, controlled by the MF6_JUMPDOWN
flag.
SVN r1835 (trunk)
* MBF's dog (definition only, no sprites yet.)
* User variables. There's an array of 10. They can be set and checked in both DECORATE and ACS.
* Made the tag name changeable but eliminated the redundancy of having both the meta property and the individual actor's one. Having one is fully sufficient. TO BE FIXED: Names are case insensitive but this should better be case sensitive. Unfortunately there's currently nothing better than FName to store a string inside an actor without severely complicating matters. Also bumped savegame version to avoid problems with this change.
SVN r1823 (trunk)
- Added more things from Gez's experimental build:
* MBF grenade and bouncing code.
* Arch Vile ghosts emulation (only for compatibility.txt.)
* Several MBF related compatibility options.
SVN r1821 (trunk)
* info CCMD to print extended actor information (not fully implemented yet)
* summonmbf CCMD.
* Beta BFG code pointer (but not the related missiles yet.)
* PowerInvisibility enhancements.
* ScoreItem with one significant change: Added a score variable that can be
checked through ACS and DECORATE. The engine itself will do nothing with it.
* Nailgun option for A_Explode.
* A_PrintBold and A_Log.
* A_SetSpecial.
SVN r1819 (trunk)
the various bounce-related flags spread across the different Actor flags
field into a single BounceFlags field.
- Fixed: P_BounceWall() should calculate the XY velocity using a real
square root and not P_AproxDistance(), because the latter can cause
them to speed up or slow down.
SVN r1796 (trunk)
velocity, and now it's known as such. The actor variables momx/momy/momz
are now known as velx/vely/velz, and the ACS functions GetActorMomX/Y/Z
are now known as GetActorVelX/Y/Z. For compatibility, momx/momy/momz will
continue to work as aliases from DECORATE. The ACS functions, however,
require you to use the new name, since they never saw an official release
yet.
SVN r1689 (trunk)
a Minotaur couldn't spawn floor flames when standing in water having its
feet clipped.
- added vid_vsync to display options.
- fixed: Animations of type 'Range' must be disabled if the textures don't
come from the same definition unit (i.e both containing file and use type
are identical.)
- changed: Item pushing is now only done once per P_XYMovement call.
- Increased the push factor of Heretic's pod to 0.5 so that its behavior
more closely matches the original which depended on several bugs in the engine.
- Removed damage thrust clamping in P_DamageMobj and changed the thrust calculation
to use floats to prevent overflows. The prevention of the overflows was the
only reason the clamping was done.
- Added Raven's dagger-like vector sprite for the player to the automap code.
SVN r1668 (trunk)
* BUMPSPECIAL flag: actors with this flag will run their special if collided on by a player
* WEAPON.NOAUTOAIM flag, though it is restricted to attacks that spawn a missile (it will not affect autoaim settings for a hitscan or railgun, and that's deliberate)
* A_FireSTGrenade codepointer, extended to be parameterizable
* The grenade (as the default actor for A_FireSTGrenade)
* Protective armors à la RedArmor: they work with a DamageFactor; for example to recreate the RedArmor from Skulltag, copy its code from skulltag.pk3 but remove the "native" keyword and add DamageFactor "Fire" 0.1 to its properties.
SVN r1661 (trunk)
- Added MF6_NOFEAR flag.
- Added A_MonsterRefire(probability, jumptarget).
- Added A_JumpIfTargetInSight(state) action function.
- Changed: Puffs set their angle to face the originator of the attack.
- Strife's burning hands originally make the level view fullbright.
changed in ZDoom to do partial brightening.
SVN r1642 (trunk)
regardless of pain chance.
- Changed screenblocks CVAR to be settable per game.
- Added SpawnSpotForced and SpawnSpotFacingForced ACS functions.
- Added pushfactor actor property.
SVN r1638 (trunk)
the game has finished.
- Added NOBOSSRIP flag. Note: we are now at flags6!
- Added SetSkyScrollSpeed(int skyplane, fixed speed) ACS function.
- Added THRUACTORS flag that disables all actor<->actor collision detection.
- Added DONTSEEKINVISIBLE flag for missiles that can't home in on invisible
targets.
- Added SFX_TRANSFERPITCH flag to A_SpawnItemEx.
- Added Ultimate Freedoom IWAD detection.
- Added GetAirSupply and SetAirSupply functions to ACS.
- Fixed: The *surface sound was not played when drowning was switched off
by setting the level's air supply to 0.
SVN r1619 (trunk)
- Changed bounce flags into a property and added real bouncing sound properties.
Compatibility modes to preserve use of the SeeSound are present and the old
flags map to these.
SVN r1599 (trunk)
so it contained an invalid pointer. There were also a few other places that
simply assumed that the second chip is set to something valid.
- Fixed: NPCs which are engaged in a conversation should not move.
- Fixed: Player movement animation was not stopped when starting a conversation.
SVN r1439 (trunk)
certain actors and added an option to APowerInvisibility to set this
flag when active.
- Added map specific automap backgrounds.
- Fixed: Voodoo dolls did not play a sound when dying.
- Added colorized error messages to DECORATE and made a few more error
conditions that do not block further parsing not immediately abort.
- Made all errors in CreateNewActor not immediately fatal so that the
rest of the DECORATE lump can be parsed normally to look for more errors.
- Fixed: Defining classes with the same name as their immediate base class
was legal. It should not be allowed that a class has another one with the
same name in its ancestry.
- Fixed: Formatting of the intermission screen on Heretic, Hexen and Strife
was broken. Changed it to use WI_Drawpercent which does it properly and
also allows showing percentage in these games now.
- Fixed: The MAPINFO parser ignored missing terminating braces of the last
block in the file.
SVN r1425 (trunk)
- added a new compatmode CVAR which allows setting some generic compatibility
flag combinations:
Doom: sets the options needed to make most Doom.exe compatible map play without
errors.
Doom (strict): Same as above but sets a few more options. Please note that this
does not mean full Doom.exe behavior emulation.
Boom: Sets all options that consider differences between ZDoom and Boom.
ZDoom 2.0.63: Sets only the COMPATF_SOUNDTARGET option which is needed for
many older ZDoom maps.
- added new COMPAT_CROSSDROPOFF option to block monsters from being pushed over
dropoffs by damage kickback.
- fixed: AFastProjectile::Tick must call Effect only 8 times per tic, regardless
of the amount of steps taken.
- fixed: momentum checks in AFastProjectile did not use absolute values.
SVN r1369 (trunk)
failed to start the demo.
- Added a MF5_BRIGHT flag to always render an actor fullbright.
- Fixed: Calling Door_Animated with a non-zero tag created a new thinker
for each two-sided line of the sector.
- Added Karate Chris's submission for making 'spray' a cheat.
- Added CO2's default parameter additions for several Doom code pointers
submission.
- Added CO2's A_RemoveMaster/A_RemoveChildren submission.
- Added Blzut3's SBARINFO replacement for the Doom statusbar.
- Fixed: SBarInfo still displayed the wrong bar for height 0
- Added A_KillSiblings and A_DamageSiblings code pointers.
- added MaxAbsorb and MaxFullAbsorb properties for Armor.
SVN r1304 (trunk)
two-entry array for passing to the main FindState() routine, but did
not actually pass it, passing the original primary label instead.
SVN r1261 (trunk)
against decorations without breaking anything newer:
Added a new 'projectilepassheight' property that defines an alternative height
that is only used when checking a projectile's movement against this actor.
If the value is positive it is used regardless of other settings, if it is
negative, its absolute will be used if a new compatibility option is enabled
and if it is 0 the normal height will be used.
SVN r1253 (trunk)
the NextState parameter is. The code did some rather unsafe checks with it
to determine its type.
- moved all state related code into a new file: p_states.cpp.
- merged all FindState functions. All the different variations are now inlined
and call the same function to do the real work.
SVN r1243 (trunk)
some changes to the MAPINFO parser which tried to access the texture manager
to check if the level name patches exist. That check had to be moved to
where the intermission screen is set up.
- Fixed: 'bloodcolor' ignored the first parameter value when given a list
of integers.
Please note that this creates an incompatibility between old and new
versions so if you want to create something that works with both 2.2.0
and current versions better use the string format version for the color
parameter!
- Rewrote the DECORATE property parser so that the parser is completely
separated from the property handlers. This should allow reuse of all
the handler code for a new format if Doomscript requires one.
- Fixed: PClass::InitializeActorInfo copied too many bytes if a subclass's
defaults were larger than the parent's.
- Moved A_ChangeFlag to thingdef_codeptr.cpp.
- Moved translation related code from thingdef_properties.cpp to r_translate.cpp
and rewrote the translation parser to use FScanner instead of strtol.
- replaced DECORATE's 'alpha default' by 'defaultalpha' for consistency.
Since this was never used outside zdoom.pk3 it's not critical.
- Removed support for game specific pickup messages because the only thing
this was ever used for - Raven's invulnerability item - has already been
split up into a Heretic and Hexen version.
SVN r1240 (trunk)
internal actor classes which no longer exist.
- Changed the state structure so that the Tics value doesn't need to be hacked
into misc1 with SF_BIGTIC anymore.
- Changed sprite processing so that sprite names are converted to indices
during parsing so that an additional postprocessing step is no longer needed.
- Fixed: Sprite names in DECORATE were case sensitive.
- Exported AActor's defaults to DECORATE and removed all code for the
internal property parser which is no longer needed.
SVN r1146 (trunk)
- Made the speed a parameter to A_RaiseMobj and A_SinkMobj and deleted
GetRaiseSpeed and GetSinkSpeed.
- Added some remaining DECORATE conversions for Hexen by Karate Chris.
SVN r1144 (trunk)
- AActor::PreExplode is gone now that the last item that was using it has been converted.
- Converted the Sigil and the remaining things in a_strifeitems.cpp to DECORATE.
SVN r1132 (trunk)
- Fixed: AStalker::CheckMeleeRange did not perform all checks of AActor::CheckMeleeRange.
I replaced this virtual override with a new flag MF5_NOVERTICALMELEERANGE so that
this feature can also be used by other actors.
- Converted Strife's Stalker to DECORATE.
- Converted ArtiTeleport to DECORATE.
SVN r1126 (trunk)
occurences in the code that depended on it were changed accordingly.
Invulnerability colormaps are now being set by the items exclusively.
- Changed many checks for the friendly Minotaur to a new flag MF5_SUMMONEDMONSTER
so that it can hopefully be generalized to be usable elsewhere later.
- Added Gez's submission for converting the Minotaur to DECORATE.
SVN r1120 (trunk)
that animated icons can be done with it.
- Changed FImageCollection to use a TArray to hold its data.
- Fixed: SetChanHeadSettings did an assignment instead of comparing
the channel ID witg CHAN_CEILING.
- Changed sound sequence names for animated doors to FNames.
- Automatically fixed: DCeiling didn't properly serialize its texture id.
- Replaced integers as texture ID representation with a specific new type
to track down all potentially incorrect uses and remaining WORDs used
for texture IDs so that more than 32767 or 65535 textures can be defined.
SVN r1036 (trunk)
consideration the size and shape of the sector producing the sound. See
the lifts on Doom 2 MAP30 and compare with previous versions.
- Fixed: The stop sound for sector-based sound sequences was not played with
the CHAN_AREA flag.
- Removed the distinction between S_Sound() and S_SoundID() functions. Use
S_Sound() for both names and IDs from now on.
SVN r1034 (trunk)
- Changed: Players don't telefrag when they are spawned now but after all
actors have been spawned to avoid accidental voodoo doll telefragging.
- Fixed: ACS scripts for non-existent maps were started on the current one.
- Added a 'wallbouncefactor' property to AActor.
- Reverted forceunderwater change from r1026 and fixed the problem for real:
SECF_FORCEDUNDERWATER only has meaning when coming from the heightsec.
So the initial check of the current sector in AActor::UpdateWaterLevel
must only check for SECF_UNDERWATER, not SECF_UNDERWATERMASK.
SVN r1027 (trunk)
They are not needed anywhere else.
- Changed the HackHack hack for corrupt 256 pixel high textures that
FMultiPatchTexture only calls a virtual function instead of doing any
type checks of the patch itself.
- Cleaned up the constant definitions in doomdata.h.
- Moved the TEXTUREx structures from doomdata.h to multipatchtexture.cpp
because they are used only in this one file.
- Removed some more typedefs from r_defs.h and doomdata.h
- Moved local polyobject data definitions from p_local.h to po_man.cpp.
SVN r1012 (trunk)
- Separated mapthing2_t into mapthinghexen_t and the internal FMapThing so
that it is easier to add new features in the UDMF map format.
- Added some initial code to read UDMF maps.
SVN r956 (trunk)
- Removed FRadiusThingsIterator after discovering that VC++ misoptimized
it in P_CheckPosition. Now FBlockThingsIterator is used with the distance
check being done manually.
SVN r914 (trunk)
and P_TryMove. Moved BlockingLine and BlockingMobj into AActor because
the global variables can be easily overwritten with certain DECORATE
constructs.
SVN r894 (trunk)
line.
- Fixed: P_SpawnPuff assumed that all melee attacks have the same range
(MELEERANGE) and didn't set the puff to its melee state if the range
was different. Even worse, it checked a global variable for this so
the behavior was undefined when P_SpawnPuff was called from anywhere
else but P_LineAttack. To reduce the amount of parameters I combined
this information with the hitthing and temporary parameters into one
flags parameter. Also changed P_LineAttack so that it gets passed
an additional parameter that specifies whether the attack is a melee
attack or not and set this to true in all calls that are to be considered
melee attacks. I couldn't use the damage type because A_CustomPunch
and A_CustomMeleeAttack allow passing any damage type they want.
- Added a sprite option as an alternative of particles for FX_ROCKET
and FX_GRENADE.
SVN r879 (trunk)
DECORATE was wrong (2 instead of 1.)
- Changed: Hexen set every cluster to be a hub if it hadn't been defined before
a level using this cluster. Now it will only do that if HexenHack is true,
i.e. when original Hexen format MAPINFOs are parsed. For ZDoom format
MAPINFOs it will now be the same as for the other games which means that
'hub' has to be declared explicitly.
- Added an Idle state that is entered in place of the spawn state if a monster
has to return to its inactive state if it can't find any more targets.
- Added MF5_NOINTERACTION flag which completely disables all physics related
code for any actor with this flag. Mostly useful for particle effects where
the actors just move a certain distance and then disappear.
- Removed the last remains of the antialias precalculation code from
am_map.cpp because it was no longer used.
- Fixed: Two-sided lines bordering a secret sector were not drawn in the
proper color
- Fixed: The automap didn't check ACS_LockedExecuteDoor for its lock color.
SVN r876 (trunk)
- Fixed: Heretic linetype translations included the wrong file.
- Removed all 2D sound positioning code from s_sound.cpp. Everything uses
FMOD's 3D engine now.
- Removed all the channel selection code from s_sound.cpp. FMOD has code to
handle this sort of thing, so let's use it.
- Replaced S_StopSoundID() with S_CheckSingular(). There is no longer a limit
on the number of copies of a particular sound that can be playing at once,
aside from Strife's special singular sounds. (Sorry, Heretic and Hexen.)
Consequently, the SNDINFO $limit command is now ignored.
- Removed ATTN_SURROUND, since FMOD Ex doesn't exactly support it, and it
only worked as intended on stereo speakers anyway.
- Cleaned out ancient crud from i_sound.cpp.
SVN r826 (trunk)
it is 1-based.
- added MF5_DONTRIP flag.
- added CheckActorFloorTexture, CheckActorCeilingTexture and
GetActorLightLevel ACS functions.
- added IF_ADDITIVETIME flag to create powerups that add their duration
to the one of the currently active item of the same type.
- fixed: bouncecount wasn't decreased when bouncing on walls.
- Added MF5_ALWAYSRESPAWN and MF5_NEVERRESPAWN flags that selectively
enable or disable monster respawning regardless of skill setting.
- Prettified deprecated flag handling.
SVN r780 (trunk)
- Added .txt files to the list of types (wad, zip, and pk3) that can be
loaded without listing them after -file.
- Fonts that are created by the ACS setfont command to wrap a texture now
support animated textures.
- FON2 fonts can now use their full palette for CR_UNTRANSLATED when drawn
with the hardware 2D path instead of being restricted to the game palette.
- Fixed: Toggling vid_vsync would reset the displayed fullscreen gamma to 1
on a Radeon 9000.
- Added back the off-by-one palette handling, but in a much more limited
scope than before. The skipped entry is assumed to always be at 248, and
it is assumed that all Shader Model 1.4 cards suffer from this. That's
because all SM1.4 cards are based on variants of the ATI R200 core, and the
RV250 in a Radeon 9000 craps up like this. I see no reason to assume that
other flavors of the R200 are any different. (Interesting note: With the
Radeon 9000, D3DTADDRESS_CLAMP is an invalid address mode when using the
debug Direct3D 9 runtime, but it works perfectly fine with the retail
Direct3D 9 runtime.) (Insight: The R200 probably uses bytes for all its
math inside pixel shaders. That would explain perfectly why I can't use
constants greater than 1 with PS1.4 and why it can't do an exact mapping to
every entry in the color palette.
- Fixed: The software shaded drawer did not work for 2D, because its selected
"color"map was replaced with the identitymap before being used.
- Fixed: I cannot use Printf to output messages before the framebuffer was
completely setup, meaning that Shader Model 1.4 cards could not change
resolution.
- I have decided to let remap palettes specify variable alpha values for
their colors. D3DFB no longer forces them to 255.
- Updated re2c to version 0.12.3.
- Fixed: A_Wander used threshold as a timer, when it should have used
reactiontime.
- Fixed: A_CustomRailgun would not fire at all for actors without a target
when the aim parameter was disabled.
- Made the warp command work in multiplayer, again courtesy of Karate Chris.
- Fixed: Trying to spawn a bot while not in a game made for a crashing time.
(Patch courtesy of Karate Chris.)
- Removed some floating point math from hu_scores.cpp that somebody's GCC
gave warnings for (not mine, though).
- Fixed: The SBarInfo drawbar command crashed if the sprite image was
unavailable.
- Fixed: FString::operator=(const char *) did not release its old buffer when
being assigned to the null string.
- The scanner no longer has an upper limit on the length of strings it
accepts, though short strings will be faster than long ones.
- Moved all the text scanning functions into a class. Mainly, this means that
multiple script scanner states can be stored without being forced to do so
recursively. I think I might be taking advantage of that in the near
future. Possibly. Maybe.
- Removed some potential buffer overflows from the decal parser.
- Applied Blzut3's SBARINFO update #9:
* Fixed: When using even length values in drawnumber it would cap to a 98
value instead of a 99 as intended.
* The SBarInfo parser can now accept negatives for coordinates. This
doesn't allow much right now, but later I plan to add better fullscreen
hud support in which the negatives will be more useful. This also cleans
up the source a bit since all calls for (x, y) coordinates are with the
function getCoordinates().
- Added support for stencilling actors.
- Added support for non-black colors specified with DTA_ColorOverlay to the
software renderer.
- Fixed: The inverse, gold, red, and green fixed colormaps each allocated
space for 32 different colormaps, even though each only used the first one.
- Added two new blending flags to make reverse subtract blending more useful:
STYLEF_InvertSource and STYLEF_InvertOverlay. These invert the color that
gets blended with the background, since that seems like a good idea for
reverse subtraction. They also work with the other two blending operations.
- Added subtract and reverse subtract blending operations to the renderer.
Since the ERenderStyle enumeration was getting rather unwieldy, I converted
it into a new FRenderStyle structure that lets each parameter of the
blending equation be set separately. This simplified the set up for the
blend quite a bit, and it means a number of new combinations are available
by setting the parameters properly.
SVN r710 (trunk)
