- added Grubber's submission for customizable gravity per actor.

- Fixed: A_Jump didn't work for weapons or CustomInventory items. SVN r456 (trunk)
2007-01-20 14:27:44 +00:00 · 2007-01-20 14:27:44 +00:00 · d0c910fca6
parent 4f845508cc
commit d0c910fca6
23 changed files with 121 additions and 37 deletions
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@ -13,6 +13,12 @@ January 15, 2007
 - Added a GTK+ version of the IWAD selection dialog box. That brings the
  Linux port one step closer to feature parity with the Windows version.

+January 15, 2007 (Changes by Graf Zahl)
+- added Grubber's submission for customizable gravity per actor.
+
+January 14, 2007 (Changes by Graf Zahl)
+- Fixed: A_Jump didn't work for weapons or CustomInventory items.
+
 January 13, 2007 (Changes by Graf Zahl)
 - Adjusted AlterWeaponSprite so that it properly handles multiple
  invisibility powerups at the same time.
--- a/src/actor.h
+++ b/src/actor.h
@ -154,7 +154,6 @@ enum

 // --- mobj.flags2 ---

-	MF2_LOGRAV			= 0x00000001,	// alternate gravity setting
 	MF2_WINDTHRUST		= 0x00000002,	// gets pushed around by the wind specials
 	MF2_BOUNCE1			= 0x00000004,
 	MF2_BLASTED			= 0x00000008,	// actor will temporarily take damage from impact
@ -683,6 +682,7 @@ public:
 	fixed_t			meleerange;
 	fixed_t			bouncefactor;	// Strife's grenades use 50%, Hexen's Flechettes 70.
 	int				bouncecount;	// Strife's grenades only bounce twice before exploding
+	fixed_t			gravity;		// [GRB] Gravity factor

 	// a linked list of sectors where this object appears
 	struct msecnode_s	*touching_sectorlist;				// phares 3/14/98
--- a/src/codepointers.h
+++ b/src/codepointers.h
@ -96,6 +96,7 @@ ACTOR(Respawn)
 ACTOR(BarrelDestroy)
 ACTOR(PlayerSkinCheck)
 ACTOR(QueueCorpse)
+ACTOR(SetGravity)

 // Special code pointers for Strife's player - not to be used elsewhere!
 ACTOR(ItBurnsItBurns)
--- a/src/d_dehacked.cpp
+++ b/src/d_dehacked.cpp
@ -1000,6 +1000,11 @@ static int PatchThing (int thingy)
 						info->DamageType = NAME_Fire;
 						info->flags2 &= ~0x10000;
 					}
+					if (info->flags2 & 1)
+					{
+						info->gravity = FRACUNIT/4;
+						info->flags2 &= ~1;
+					}
 				}
 				if (vchanged[2])
 				{
--- a/src/g_heretic/a_chicken.cpp
+++ b/src/g_heretic/a_chicken.cpp
@ -142,8 +142,9 @@ IMPLEMENT_ACTOR (AChickenPlayer, Heretic, -1, 0)
 	PROP_HeightFixed (24)
 	PROP_PainChance (255)
 	PROP_SpeedFixed (1)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_Flags (MF_SOLID|MF_SHOOTABLE|MF_DROPOFF|MF_NOTDMATCH|MF_FRIENDLY)
-	PROP_Flags2 (MF2_WINDTHRUST|MF2_SLIDE|MF2_PASSMOBJ|MF2_PUSHWALL|MF2_FLOORCLIP|MF2_LOGRAV|MF2_TELESTOMP)
+	PROP_Flags2 (MF2_WINDTHRUST|MF2_SLIDE|MF2_PASSMOBJ|MF2_PUSHWALL|MF2_FLOORCLIP|MF2_TELESTOMP)
 	PROP_Flags3 (MF3_NOBLOCKMONST)
 	PROP_Flags4 (MF4_NOSKIN)

@ -281,8 +282,9 @@ FState AFeather::States[] =
 IMPLEMENT_ACTOR (AFeather, Heretic, -1, 121)
 	PROP_RadiusFixed (2)
 	PROP_HeightFixed (4)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_Flags (MF_MISSILE|MF_DROPOFF)
-	PROP_Flags2 (MF2_NOTELEPORT|MF2_LOGRAV|MF2_CANNOTPUSH|MF2_WINDTHRUST)
+	PROP_Flags2 (MF2_NOTELEPORT|MF2_CANNOTPUSH|MF2_WINDTHRUST)
 	PROP_Flags3 (MF3_DONTSPLASH)

 	PROP_SpawnState (S_FEATHER)
--- a/src/g_heretic/a_hereticmisc.cpp
+++ b/src/g_heretic/a_hereticmisc.cpp
@ -115,8 +115,9 @@ FState APodGoo::States[] =
 IMPLEMENT_ACTOR (APodGoo, Heretic, -1, 0)
 	PROP_RadiusFixed (2)
 	PROP_HeightFixed (4)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_Flags (MF_NOBLOCKMAP|MF_MISSILE|MF_DROPOFF)
-	PROP_Flags2 (MF2_NOTELEPORT|MF2_LOGRAV|MF2_CANNOTPUSH)
+	PROP_Flags2 (MF2_NOTELEPORT|MF2_CANNOTPUSH)

 	PROP_SpawnState (S_PODGOO)
 END_DEFAULTS
@ -421,8 +422,9 @@ IMPLEMENT_ACTOR (AVolcanoBlast, Heretic, -1, 123)
 	PROP_SpeedFixed (2)
 	PROP_Damage (2)
 	PROP_DamageType (NAME_Fire)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_Flags (MF_NOBLOCKMAP|MF_MISSILE|MF_DROPOFF)
-	PROP_Flags2 (MF2_LOGRAV|MF2_NOTELEPORT)
+	PROP_Flags2 (MF2_NOTELEPORT)

 	PROP_SpawnState (S_VOLCANOBALL)
 	PROP_DeathState (S_VOLCANOBALLX)
@ -459,8 +461,9 @@ IMPLEMENT_ACTOR (AVolcanoTBlast, Heretic, -1, 124)
 	PROP_SpeedFixed (2)
 	PROP_Damage (1)
 	PROP_DamageType (NAME_Fire)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_Flags (MF_NOBLOCKMAP|MF_MISSILE|MF_DROPOFF)
-	PROP_Flags2 (MF2_LOGRAV|MF2_NOTELEPORT)
+	PROP_Flags2 (MF2_NOTELEPORT)

 	PROP_SpawnState (S_VOLCANOTBALL)
 	PROP_DeathState (S_VOLCANOTBALLX)
@ -539,7 +542,7 @@ void A_VolcBallImpact (AActor *ball)
 	if (ball->z <= ball->floorz)
 	{
 		ball->flags |= MF_NOGRAVITY;
-		ball->flags2 &= ~MF2_LOGRAV;
+		ball->gravity = FRACUNIT;
 		ball->z += 28*FRACUNIT;
 		//ball->momz = 3*FRACUNIT;
 	}
--- a/src/g_heretic/a_hereticweaps.cpp
+++ b/src/g_heretic/a_hereticweaps.cpp
@ -698,7 +698,7 @@ FState ACrossbowFX4::States[] =

 IMPLEMENT_ACTOR (ACrossbowFX4, Heretic, -1, 0)
 	PROP_Flags (MF_NOBLOCKMAP)
-	PROP_Flags2 (MF2_LOGRAV)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_RenderStyle (STYLE_Add)
 	PROP_SpawnState (S_CRBOWFX4)
 END_DEFAULTS
@ -944,8 +944,9 @@ IMPLEMENT_ACTOR (AMaceFX2, Heretic, -1, 156)
 	PROP_HeightFixed (6)
 	PROP_SpeedFixed (10)
 	PROP_Damage (6)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_Flags (MF_NOBLOCKMAP|MF_MISSILE|MF_DROPOFF)
-	PROP_Flags2 (MF2_LOGRAV|MF2_HERETICBOUNCE|MF2_THRUGHOST|MF2_NOTELEPORT|MF2_PCROSS|MF2_IMPACT)
+	PROP_Flags2 (MF2_HERETICBOUNCE|MF2_THRUGHOST|MF2_NOTELEPORT|MF2_PCROSS|MF2_IMPACT)

 	PROP_SpawnState (S_MACEFX2)
 	PROP_DeathState (S_MACEFXI2)
@ -968,8 +969,9 @@ FState AMaceFX3::States[] =
 IMPLEMENT_ACTOR (AMaceFX3, Heretic, -1, 155)
 	PROP_SpeedFixed (7)
 	PROP_Damage (4)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_Flags (MF_NOBLOCKMAP|MF_MISSILE|MF_DROPOFF)
-	PROP_Flags2 (MF2_LOGRAV|MF2_HERETICBOUNCE|MF2_THRUGHOST|MF2_NOTELEPORT|MF2_PCROSS|MF2_IMPACT)
+	PROP_Flags2 (MF2_HERETICBOUNCE|MF2_THRUGHOST|MF2_NOTELEPORT|MF2_PCROSS|MF2_IMPACT)

 	PROP_SpawnState (S_MACEFX3)
 END_DEFAULTS
@ -997,8 +999,9 @@ IMPLEMENT_ACTOR (AMaceFX4, Heretic, -1, 153)
 	PROP_HeightFixed (6)
 	PROP_SpeedFixed (7)
 	PROP_Damage (18)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_Flags (MF_NOBLOCKMAP|MF_MISSILE|MF_DROPOFF)
-	PROP_Flags2 (MF2_LOGRAV|MF2_HERETICBOUNCE|MF2_THRUGHOST|MF2_TELESTOMP|MF2_PCROSS|MF2_IMPACT)
+	PROP_Flags2 (MF2_HERETICBOUNCE|MF2_THRUGHOST|MF2_TELESTOMP|MF2_PCROSS|MF2_IMPACT)

 	PROP_SpawnState (S_MACEFX4)
 	PROP_DeathState (S_MACEFXI4)
@ -1213,7 +1216,7 @@ void A_MacePL1Check (AActor *ball)
 	}
 	ball->special1 = 0;
 	ball->flags &= ~MF_NOGRAVITY;
-	ball->flags2 |= MF2_LOGRAV;
+	ball->gravity = FRACUNIT/8;
 	// [RH] Avoid some precision loss by scaling the momentum directly
 #if 0
 	angle_t angle = ball->angle>>ANGLETOFINESHIFT;
@ -1249,7 +1252,7 @@ void A_MaceBallImpact (AActor *ball)
 	{ // Explode
 		ball->momx = ball->momy = ball->momz = 0;
 		ball->flags |= MF_NOGRAVITY;
-		ball->flags2 &= ~MF2_LOGRAV;
+		ball->gravity = FRACUNIT;
 		S_Sound (ball, CHAN_BODY, "weapons/macehit", 1, ATTN_NORM);
 	}
 }
@ -1317,7 +1320,8 @@ void A_MaceBallImpact2 (AActor *ball)
 boom:
 		ball->momx = ball->momy = ball->momz = 0;
 		ball->flags |= MF_NOGRAVITY;
-		ball->flags2 &= ~(MF2_LOGRAV|MF2_BOUNCETYPE);
+		ball->flags2 &= ~MF2_BOUNCETYPE;
+		ball->gravity = FRACUNIT;
 	}
 }

@ -1443,7 +1447,7 @@ void A_DeathBallImpact (AActor *ball)
 boom:
 		ball->momx = ball->momy = ball->momz = 0;
 		ball->flags |= MF_NOGRAVITY;
-		ball->flags2 &= ~MF2_LOGRAV;
+		ball->gravity = FRACUNIT;
 		S_Sound (ball, CHAN_BODY, "weapons/maceexplode", 1, ATTN_NORM);
 	}
 }
--- a/src/g_heretic/a_knight.cpp
+++ b/src/g_heretic/a_knight.cpp
@ -191,7 +191,7 @@ void A_DripBlood (AActor *actor)
 	mo = Spawn ("Blood", x, y, actor->z, ALLOW_REPLACE);
 	mo->momx = pr_dripblood.Random2 () << 10;
 	mo->momy = pr_dripblood.Random2 () << 10;
-	mo->flags2 |= MF2_LOGRAV;
+	mo->gravity = FRACUNIT/8;
 }

 //----------------------------------------------------------------------------
--- a/src/g_hexen/a_heresiarch.cpp
+++ b/src/g_hexen/a_heresiarch.cpp
@ -613,8 +613,9 @@ FState ASorcSpark1::States[] =
 IMPLEMENT_ACTOR (ASorcSpark1, Hexen, -1, 0)
 	PROP_RadiusFixed (5)
 	PROP_HeightFixed (5)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_Flags (MF_NOBLOCKMAP|MF_DROPOFF)
-	PROP_Flags2 (MF2_LOGRAV|MF2_NOTELEPORT)
+	PROP_Flags2 (MF2_NOTELEPORT)
 	PROP_RenderStyle (STYLE_Add)

 	PROP_SpawnState (S_SORCSPARK1)
@ -1337,7 +1338,7 @@ void A_SorcBallPop(AActor *actor)
 {
 	S_Sound (actor, CHAN_BODY, "SorcererBallPop", 1, ATTN_NONE);
 	actor->flags &= ~MF_NOGRAVITY;
-	actor->flags2 |= MF2_LOGRAV;
+	actor->gravity = FRACUNIT/8;
 	actor->momx = ((pr_heresiarch()%10)-5) << FRACBITS;
 	actor->momy = ((pr_heresiarch()%10)-5) << FRACBITS;
 	actor->momz = (2+(pr_heresiarch()%3)) << FRACBITS;
--- a/src/g_hexen/a_hexenspecialdecs.cpp
+++ b/src/g_hexen/a_hexenspecialdecs.cpp
@ -313,8 +313,8 @@ FState ACorpseBloodDrip::States[] =
 IMPLEMENT_ACTOR (ACorpseBloodDrip, Hexen, -1, 0)
 	PROP_RadiusFixed (1)
 	PROP_HeightFixed (4)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_Flags (MF_MISSILE)
-	PROP_Flags2 (MF2_LOGRAV)
 	PROP_Flags4 (MF4_NOICEDEATH)

 	PROP_SpawnState (S_CORPSEBLOODDRIP)
@ -480,8 +480,9 @@ FState ALeaf1::States[] =
 IMPLEMENT_ACTOR (ALeaf1, Hexen, -1, 0)
 	PROP_RadiusFixed (2)
 	PROP_HeightFixed (4)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_Flags (MF_NOBLOCKMAP|MF_MISSILE)
-	PROP_Flags2 (MF2_NOTELEPORT|MF2_LOGRAV)
+	PROP_Flags2 (MF2_NOTELEPORT)
 	PROP_Flags3 (MF3_DONTSPLASH)
 	PROP_Flags4 (MF4_NOICEDEATH)

--- a/src/g_hexen/a_iceguy.cpp
+++ b/src/g_hexen/a_iceguy.cpp
@ -170,8 +170,9 @@ IMPLEMENT_ACTOR (AIceGuyFX2, Hexen, -1, 0)
 	PROP_HeightFixed (4)
 	PROP_Damage (1)
 	PROP_DamageType (NAME_Ice)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_Flags (MF_NOBLOCKMAP|MF_DROPOFF|MF_MISSILE)
-	PROP_Flags2 (MF2_LOGRAV|MF2_NOTELEPORT)
+	PROP_Flags2 (MF2_NOTELEPORT)

 	PROP_SpawnState (0)
 END_DEFAULTS
@ -198,8 +199,9 @@ FState AIceGuyBit::States[] =
 IMPLEMENT_ACTOR (AIceGuyBit, Hexen, -1, 0)
 	PROP_RadiusFixed (1)
 	PROP_HeightFixed (1)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_Flags (MF_NOBLOCKMAP|MF_DROPOFF)
-	PROP_Flags2 (MF2_LOGRAV|MF2_NOTELEPORT)
+	PROP_Flags2 (MF2_NOTELEPORT)

 	PROP_SpawnState (0)
 END_DEFAULTS
--- a/src/g_hexen/a_serpent.cpp
+++ b/src/g_hexen/a_serpent.cpp
@ -268,8 +268,8 @@ FState ASerpentHead::States[] =
 IMPLEMENT_ACTOR (ASerpentHead, Hexen, -1, 0)
 	PROP_RadiusFixed (5)
 	PROP_HeightFixed (10)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_Flags (MF_NOBLOCKMAP)
-	PROP_Flags2 (MF2_LOGRAV)

 	PROP_SpawnState (S_SERPENT_HEAD1)
 	PROP_DeathState (S_SERPENT_HEAD_X1)
--- a/src/g_shared/a_action.cpp
+++ b/src/g_shared/a_action.cpp
@ -35,8 +35,9 @@ IMPLEMENT_ACTOR (AIceChunk, Any, -1, 0)
 	PROP_RadiusFixed (3)
 	PROP_HeightFixed (4)
 	PROP_Mass(5)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_Flags (MF_DROPOFF)
-	PROP_Flags2 (MF2_LOGRAV|MF2_CANNOTPUSH|MF2_FLOORCLIP|MF2_NOTELEPORT)
+	PROP_Flags2 (MF2_CANNOTPUSH|MF2_FLOORCLIP|MF2_NOTELEPORT)

 	PROP_SpawnState (0)
 END_DEFAULTS
@ -61,8 +62,9 @@ IMPLEMENT_ACTOR (AIceChunkHead, Any, -1, 0)
 	PROP_HeightFixed (4)
 	PROP_Mass(5)
 	PROP_DamageType (NAME_Ice)
+	PROP_Gravity (FRACUNIT/8)
 	PROP_Flags (MF_DROPOFF)
-	PROP_Flags2 (MF2_LOGRAV|MF2_CANNOTPUSH)
+	PROP_Flags2 (MF2_CANNOTPUSH)

 	PROP_SpawnState (0)
 END_DEFAULTS
@ -545,7 +547,7 @@ void A_NoGravity (AActor *actor)
 void A_Gravity (AActor *actor)
 {
 	actor->flags &= ~MF_NOGRAVITY;
-	actor->flags2 &= ~MF2_LOGRAV;
+	actor->gravity = FRACUNIT;
 }

 //===========================================================================
@ -557,7 +559,7 @@ void A_Gravity (AActor *actor)
 void A_LowGravity (AActor *actor)
 {
 	actor->flags &= ~MF_NOGRAVITY;
-	actor->flags2 |= MF2_LOGRAV;
+	actor->gravity = FRACUNIT/8;
 }

 //===========================================================================
--- a/src/g_shared/a_pickups.h
+++ b/src/g_shared/a_pickups.h
@ -170,7 +170,7 @@ class ACustomInventory : public AInventory
 public:

 	// This is used when an inventory item's use state sequence is executed.
-	static bool CallStateChain (AActor *actor, FState *state);
+	bool CallStateChain (AActor *actor, FState *state);

 	bool TryPickup (AActor *toucher);
 	bool Use (bool pickup);
--- a/src/info.h
+++ b/src/info.h
@ -290,6 +290,7 @@ enum
 	ADEF_FloatSpeed,
 	ADEF_RDFactor,
 	ADEF_FXFlags,
+	ADEF_Gravity,

 	ADEF_SpawnState,
 	ADEF_SeeState,
--- a/src/infodefaults.cpp
+++ b/src/infodefaults.cpp
@ -226,6 +226,7 @@ static void ApplyActorDefault (int defnum, const char *datastr, int dataint)
 	case ADEF_BounceCount:		actor->bouncecount = dataint;		break;
 	case ADEF_RDFactor:			sgClass->Meta.SetMetaFixed (AMETA_RDFactor, dataint); break;
 	case ADEF_FXFlags:			actor->effects = dataint;			break;
+	case ADEF_Gravity:			actor->gravity = dataint;			break;

 	case ADEF_SpawnState:		AddState("Spawn", datastate);		break;
 	case ADEF_SeeState:			AddState("See", datastate);			break;
--- a/src/infomacros.h
+++ b/src/infomacros.h
@ -267,6 +267,7 @@ public:
 #define PROP_BounceCount(x)				ADD_LONG_PROP(ADEF_BounceCount,x)
 #define PROP_RadiusdamageFactor(x)		ADD_LONG_PROP(ADEF_RDFactor,x)
 #define PROP_FXFlags(x)					ADD_LONG_PROP(ADEF_FXFlags,x)
+#define PROP_Gravity(x)					ADD_LONG_PROP(ADEF_Gravity,x)


 #define PROP_SpawnState(x)				ADD_BYTE_PROP(ADEF_SpawnState,x)
--- a/src/p_acs.cpp
+++ b/src/p_acs.cpp
@ -2071,6 +2071,7 @@ void DLevelScript::DoSetFont (int fontnum)
 #define APROP_JumpZ			12	// [GRB]
 #define APROP_ChaseGoal		13
 #define APROP_Frightened	14
+#define APROP_Gravity		15
 #define APROP_SeeSound		5	// Sounds can only be set, not gotten
 #define APROP_AttackSound	6
 #define APROP_PainSound		7
@ -2153,6 +2154,10 @@ void DLevelScript::DoSetActorProperty (AActor *actor, int property, int value)
 		else
 			actor->flags4 &= ~MF4_FRIGHTENED;
 		break;
+		
+	case APROP_Gravity:
+		actor->gravity = value;
+		break;

 	case APROP_SeeSound:
 		actor->SeeSound = S_FindSound (FBehavior::StaticLookupString (value));
@ -2204,6 +2209,7 @@ int DLevelScript::GetActorProperty (int tid, int property)
 	case APROP_Damage:		return actor->Damage;	// Should this call GetMissileDamage() instead?
 	case APROP_Alpha:		return actor->alpha;
 	case APROP_RenderStyle:	return actor->RenderStyle;
+	case APROP_Gravity:		return actor->gravity;
 	case APROP_Ambush:		return !!(actor->flags & MF_AMBUSH);
 	case APROP_ChaseGoal:	return !!(actor->flags5 & MF5_CHASEGOAL);
 	case APROP_Frightened:	return !!(actor->flags4 & MF4_FRIGHTENED);
--- a/src/p_mobj.cpp
+++ b/src/p_mobj.cpp
@ -312,7 +312,8 @@ void AActor::Serialize (FArchive &arc)
 		<< bouncefactor
 		<< bouncecount
 		<< meleerange
-		<< DamageType;
+		<< DamageType
+		<< gravity;

 	if (arc.IsStoring ())
 	{
@ -1843,7 +1844,7 @@ void P_ZMovement (AActor *mo)
 			!(mo->player->cmd.ucmd.forwardmove | mo->player->cmd.ucmd.sidemove)))
 		{
 			mo->momz -= (fixed_t)(level.gravity * mo->Sector->gravity *
-				(mo->flags2 & MF2_LOGRAV ? 10.24 : 81.92));
+				FIXED2FLOAT(mo->gravity) * 81.92);
 		}
 		if (mo->waterlevel > 1)
 		{
@ -3000,7 +3001,8 @@ void A_FreeTargMobj (AActor *mo)
 	mo->z = mo->ceilingz + 4*FRACUNIT;
 	mo->flags &= ~(MF_SHOOTABLE|MF_FLOAT|MF_SKULLFLY|MF_SOLID);
 	mo->flags |= MF_CORPSE|MF_DROPOFF|MF_NOGRAVITY;
-	mo->flags2 &= ~(MF2_PASSMOBJ|MF2_LOGRAV);
+	mo->flags2 &= ~MF2_PASSMOBJ;
+	mo->gravity = FRACUNIT;
 	mo->player = NULL;
 }

@ -3051,6 +3053,7 @@ BEGIN_DEFAULTS (AActor, Any, -1, 0)
 	PROP_BounceFactor(FRACUNIT*7/10)
 	PROP_BounceCount(-1)
 	PROP_FloatSpeed(4)
+	PROP_Gravity(FRACUNIT)
 END_DEFAULTS

 //==========================================================================
--- a/src/p_things.cpp
+++ b/src/p_things.cpp
@ -247,7 +247,7 @@ bool P_Thing_Projectile (int tid, AActor *source, int type, const char * type_na
 						mobj->flags &= ~MF_NOGRAVITY;
 						if (!(mobj->flags3 & MF3_ISMONSTER) && gravity == 1)
 						{
-							mobj->flags2 |= MF2_LOGRAV;
+							mobj->gravity = FRACUNIT/8;
 						}
 					}
 					else
--- a/src/thingdef.cpp
+++ b/src/thingdef.cpp
@ -129,7 +129,6 @@ static flagdef ActorFlags[]=
 	DEFINE_FLAG(MF, NOLIFTDROP, AActor, flags),
 	DEFINE_FLAG(MF, STEALTH, AActor, flags),
 	DEFINE_FLAG(MF, ICECORPSE, AActor, flags),
-	DEFINE_FLAG2(MF2_LOGRAV, LOWGRAVITY, AActor, flags2),
 	DEFINE_FLAG(MF2, WINDTHRUST, AActor, flags2),
 	DEFINE_FLAG(MF2, HERETICBOUNCE , AActor, flags2),
 	DEFINE_FLAG(MF2, BLASTED, AActor, flags2),
@ -3224,6 +3223,22 @@ static void ActorVSpeed (AActor *defaults, Baggage &bag)
 	defaults->momz = fixed_t(sc_Float*FRACUNIT);
 }

+//==========================================================================
+//
+//==========================================================================
+static void ActorGravity (AActor *defaults, Baggage &bag)
+{
+	SC_MustGetFloat ();
+
+	if (sc_Float < 0.f || sc_Float > 1.f)
+		SC_ScriptError ("Gravity must be in the range [0,1]");
+
+	defaults->gravity = FLOAT2FIXED (sc_Float);
+
+	if (sc_Float == 0.f)
+		defaults->flags |= MF_NOGRAVITY;
+}
+
 //==========================================================================
 //
 //==========================================================================
@ -3276,6 +3291,11 @@ static void ActorFlagSetOrReset (AActor *defaults, Baggage &bag)
 		if (mod == '+') defaults->DamageType = NAME_Ice;
 		else defaults->DamageType = NAME_None;
 	}
+	else if (SC_Compare ("LOWGRAVITY"))
+	{
+		if (mod == '+') defaults->gravity = FRACUNIT/8;
+		else defaults->gravity = FRACUNIT;
+	}
 	else
 	{
 		FString part1 = sc_String;
@ -4099,6 +4119,7 @@ static const ActorProps props[] =
 	{ "floatspeed",					ActorFloatSpeed,			RUNTIME_CLASS(AActor) },
 	{ "game",						ActorGame,					RUNTIME_CLASS(AActor) },
 	{ "gibhealth",					ActorGibHealth,				RUNTIME_CLASS(AActor) },
+	{ "gravity",					ActorGravity,				RUNTIME_CLASS(AActor) },
 	{ "heal",						ActorHealState,				RUNTIME_CLASS(AActor) },
 	{ "health",						ActorHealth,				RUNTIME_CLASS(AActor) },
 	{ "health.lowmessage",			(apf)HealthLowMessage,		RUNTIME_CLASS(AHealth) },
--- a/src/thingdef_codeptr.cpp
+++ b/src/thingdef_codeptr.cpp
@ -88,6 +88,7 @@ FState * CallingState;
 struct StateCallData
 {
 	FState * State;
+	AActor * Item;
 	bool Result;
 };

@ -110,6 +111,7 @@ bool ACustomInventory::CallStateChain (AActor *actor, FState * State)
 	int counter = 0;

 	pStateCall = &StateCall;
+	StateCall.Item = this;
 	while (State != NULL)
 	{
 		// Assume success. The code pointer will set this to false if necessary
@ -387,7 +389,7 @@ FState *P_GetState(AActor *self, FState *CallingState, int offset)
 	{
 		return CallingState + offset;
 	}
-	else
+	else if (self != NULL)
 	{
 		offset = -offset;

@ -412,6 +414,7 @@ FState *P_GetState(AActor *self, FState *CallingState, int offset)
 		}
 		return jumpto;
 	}
+	else return NULL;
 }

 //==========================================================================
@ -421,24 +424,29 @@ FState *P_GetState(AActor *self, FState *CallingState, int offset)
 //==========================================================================
 static void DoJump(AActor * self, FState * CallingState, int offset)
 {
-	FState *jumpto = P_GetState(self, CallingState, offset);
-
-	if (jumpto == NULL) return;

 	if (pStateCall != NULL && CallingState == pStateCall->State)
 	{
+		FState *jumpto = P_GetState(pStateCall->Item, CallingState, offset);
+		if (jumpto == NULL) return;
 		pStateCall->State = jumpto;
 	}
 	else if (self->player != NULL && CallingState == self->player->psprites[ps_weapon].state)
 	{
+		FState *jumpto = P_GetState(self->player->ReadyWeapon, CallingState, offset);
+		if (jumpto == NULL) return;
 		P_SetPsprite(self->player, ps_weapon, jumpto);
 	}
 	else if (self->player != NULL && CallingState == self->player->psprites[ps_flash].state)
 	{
+		FState *jumpto = P_GetState(self->player->ReadyWeapon, CallingState, offset);
+		if (jumpto == NULL) return;
 		P_SetPsprite(self->player, ps_flash, jumpto);
 	}
 	else
 	{
+		FState *jumpto = P_GetState(self, CallingState, offset);
+		if (jumpto == NULL) return;
 		self->SetState (jumpto);
 	}
 }
@ -2045,3 +2053,18 @@ void A_PlayerSkinCheck (AActor *actor)
 		}	
 	}
 }
+
+//===========================================================================
+//
+// A_SetGravity
+//
+//===========================================================================
+void A_SetGravity(AActor * self)
+{
+	int index=CheckIndex(1);
+	if (index<0) return;
+	
+	self->gravity = clamp<fixed_t> (EvalExpressionF (StateParameters[index], self), 0, FRACUNIT); 
+}
+
+
--- a/wadsrc/decorate/nativeclasses.txt
+++ b/wadsrc/decorate/nativeclasses.txt
@ -73,6 +73,7 @@ class Actor extends Thinker
 	action native A_NoGravity();
 	action native A_Gravity();
 	action native A_LowGravity();
+	action native A_SetGravity(eval float gravity);
 	action native A_Fall();
 	action native A_SetSolid();
 	action native A_UnsetSolid();