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Add NOFRICTION and NOFRICTIONBOUNCE flags

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NOFRICTION disables all friction effects on the thing it's set on
(including the speed cap from water/crouching), and NOFRICTIONBOUNCE
disables the "bounce off walls on an icy floor" effect on the thing
it's set on.
This commit is contained in:
Ijon 2018-11-17 17:34:27 -06:00 committed by Christoph Oelckers
parent 1bb2bb31d4
commit d2d684a35a
5 changed files with 13 additions and 4 deletions
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2
src/actor.h
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@ -405,6 +405,8 @@ enum ActorFlag8
MF8_BLOCKASPLAYER = 0x00000004, // actor is blocked by player-blocking lines even if not a player
MF8_DONTFACETALKER = 0x00000008, // don't alter the angle to face the player in conversations
MF8_HITOWNER = 0x00000010, // projectile can hit the actor that fired it
MF8_NOFRICTION = 0x00000020, // friction doesn't apply to the actor at all
MF8_NOFRICTIONBOUNCE = 0x00000040, // don't bounce off walls when on icy floors
};
// --- mobj.renderflags ---

2
src/p_enemy.cpp
View file

@ -464,7 +464,7 @@ int P_Move (AActor *actor)
// [RH] I'm not so sure this is such a good idea
// [GZ] That's why it's compat-optioned.
if (compatflags & COMPATF_MBFMONSTERMOVE)
if (compatflags & COMPATF_MBFMONSTERMOVE && !(actor->flags8 & MF8_NOFRICTION))
{
// killough 10/98: make monsters get affected by ice and sludge too:
movefactor = P_GetMoveFactor (actor, &friction);

1
src/p_map.cpp
View file

@ -2812,6 +2812,7 @@ void FSlide::HitSlideLine(line_t* ld)
// killough 10/98: only bounce if hit hard (prevents wobbling)
icyfloor =
!(slidemo->flags8 & MF8_NOFRICTIONBOUNCE) &&
tmmove.LengthSquared() > 4*4 &&
var_friction && // killough 8/28/98: calc friction on demand
slidemo->Z() <= slidemo->floorz &&

10
src/p_mobj.cpp
View file

@ -1865,8 +1865,12 @@ double P_XYMovement (AActor *mo, DVector2 scroll)
// that large thrusts can't propel an actor through a wall, because wall
// running depends on the player's original movement continuing even after
// it gets blocked.
if ((mo->player != NULL && (i_compatflags & COMPATF_WALLRUN)) || (mo->waterlevel >= 1) ||
(mo->player != NULL && mo->player->crouchfactor < 0.75))
//
// [anon] When friction is turned off, turn off the crouching and water
// speed caps as well, since it is a sort of friction, and the modders
// most likely want to deal with that themselves.
if ((mo->player != NULL && (i_compatflags & COMPATF_WALLRUN)) || ((mo->waterlevel >= 1 ||
(mo->player != NULL && mo->player->crouchfactor < 0.75)) && !(mo->flags8 & MF8_NOFRICTION)))
{
// preserve the direction instead of clamping x and y independently.
double cx = mo->Vel.X == 0 ? 1. : clamp(mo->Vel.X, -maxmove, maxmove) / mo->Vel.X;
@ -2255,7 +2259,7 @@ explode:
return Oldfloorz;
}
if (mo->flags & (MF_MISSILE | MF_SKULLFLY))
if (mo->flags & (MF_MISSILE | MF_SKULLFLY) || mo->flags8 & MF8_NOFRICTION)
{ // no friction for missiles
return Oldfloorz;
}

2
src/scripting/thingdef_data.cpp
View file

@ -319,6 +319,8 @@ static FFlagDef ActorFlagDefs[]=
DEFINE_FLAG(MF8, BLOCKASPLAYER, AActor, flags8),
DEFINE_FLAG(MF8, DONTFACETALKER, AActor, flags8),
DEFINE_FLAG(MF8, HITOWNER, AActor, flags8),
DEFINE_FLAG(MF8, NOFRICTION, AActor, flags8),
DEFINE_FLAG(MF8, NOFRICTIONBOUNCE, AActor, flags8),
// Effect flags
DEFINE_FLAG(FX, VISIBILITYPULSE, AActor, effects),