From c0eb39ec728dbae4b495f26e87777c6d30af8596 Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <c.oelckers@zdoom.fake>
Date: Tue, 10 Feb 2015 23:09:57 +0100
Subject: [PATCH 1/2] - fixed: The exploding ArtiTimeBomb must disable movement
 interpolation for its position change needed to display the explosion frames
 correctly.

---
 src/g_heretic/a_hereticartifacts.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/g_heretic/a_hereticartifacts.cpp b/src/g_heretic/a_hereticartifacts.cpp
index 1c9df572c..651e3609c 100644
--- a/src/g_heretic/a_hereticartifacts.cpp
+++ b/src/g_heretic/a_hereticartifacts.cpp
@@ -48,6 +48,7 @@ bool AArtiTomeOfPower::Use (bool pickup)
 DEFINE_ACTION_FUNCTION(AActor, A_TimeBomb)
 {
 	self->z += 32*FRACUNIT;
+	self->PrevZ = self->z;	// no interpolation!
 	self->RenderStyle = STYLE_Add;
 	self->alpha = FRACUNIT;
 	P_RadiusAttack (self, self->target, 128, 128, self->DamageType, RADF_HURTSOURCE);

From 337682934cb1017b26059abdd53ba6f132626fdd Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <c.oelckers@zdoom.fake>
Date: Tue, 10 Feb 2015 23:40:53 +0100
Subject: [PATCH 2/2] - fixed: CF_FLY cannot be part of the player_t structure
 and be tracked properly. It needs to be part of the actor itself that has
 MF2_FLY set so it got moved to flags7. - removed some fudging code that tried
 to work around the shortcomings of CF_FLY but was ultimately causing more
 problems than it solved.

---
 src/actor.h                  | 1 +
 src/g_level.cpp              | 9 ---------
 src/g_shared/a_artifacts.cpp | 3 ++-
 src/m_cheat.cpp              | 3 +--
 src/p_lnspec.cpp             | 4 +++-
 src/p_mobj.cpp               | 2 +-
 6 files changed, 8 insertions(+), 14 deletions(-)

diff --git a/src/actor.h b/src/actor.h
index 0ab589107..b7a8614a7 100644
--- a/src/actor.h
+++ b/src/actor.h
@@ -353,6 +353,7 @@ enum
 	MF7_HITTARGET		= 0x00004000,	// The actor the projectile dies on is set to target, provided it's targetable anyway.
 	MF7_HITMASTER		= 0x00008000,	// Same as HITTARGET, except it's master instead of target.
 	MF7_HITTRACER		= 0x00010000,	// Same as HITTARGET, but for tracer.
+	MF7_FLYCHEAT		= 0x00020000,	// must be part of the actor so that it can be tracked properly
 
 
 
diff --git a/src/g_level.cpp b/src/g_level.cpp
index b6cc1cd84..2d44bfc27 100644
--- a/src/g_level.cpp
+++ b/src/g_level.cpp
@@ -1235,15 +1235,6 @@ void G_FinishTravel ()
 			pawn->AddToHash ();
 			pawn->SetState(pawn->SpawnState);
 			pawn->player->SendPitchLimits();
-			// Sync the FLY flags.
-			if (pawn->flags2 & MF2_FLY)
-			{
-				pawn->player->cheats |= CF_FLY;
-			}
-			else
-			{
-				pawn->player->cheats &= ~CF_FLY;
-			}
 
 			for (inv = pawn->Inventory; inv != NULL; inv = inv->Inventory)
 			{
diff --git a/src/g_shared/a_artifacts.cpp b/src/g_shared/a_artifacts.cpp
index 21006776e..14b270435 100644
--- a/src/g_shared/a_artifacts.cpp
+++ b/src/g_shared/a_artifacts.cpp
@@ -997,7 +997,8 @@ void APowerFlight::EndEffect ()
 	{
 		return;
 	}
-	if (!(Owner->player->cheats & CF_FLY))
+
+	if (!(Owner->flags7 & MF7_FLYCHEAT))
 	{
 		if (Owner->z != Owner->floorz)
 		{
diff --git a/src/m_cheat.cpp b/src/m_cheat.cpp
index e48b79980..f60131c8e 100644
--- a/src/m_cheat.cpp
+++ b/src/m_cheat.cpp
@@ -149,8 +149,7 @@ void cht_DoCheat (player_t *player, int cheat)
 	case CHT_FLY:
 		if (player->mo != NULL)
 		{
-			player->cheats ^= CF_FLY;
-			if (player->cheats & CF_FLY)
+			if ((player->mo->flags7 ^= MF7_FLYCHEAT) != 0)
 			{
 				player->mo->flags |= MF_NOGRAVITY;
 				player->mo->flags2 |= MF2_FLY;
diff --git a/src/p_lnspec.cpp b/src/p_lnspec.cpp
index c170cacd3..b550eeb77 100644
--- a/src/p_lnspec.cpp
+++ b/src/p_lnspec.cpp
@@ -2800,7 +2800,7 @@ FUNC(LS_SetPlayerProperty)
 		mask = CF_INSTANTWEAPSWITCH;
 		break;
 	case PROP_FLY:
-		mask = CF_FLY;
+		//mask = CF_FLY;
 		break;
 	case PROP_TOTALLYFROZEN:
 		mask = CF_TOTALLYFROZEN;
@@ -2814,6 +2814,7 @@ FUNC(LS_SetPlayerProperty)
 			it->player->cheats |= mask;
 			if (arg2 == PROP_FLY)
 			{
+				it->flags7 |= MF7_FLYCHEAT;
 				it->flags2 |= MF2_FLY;
 				it->flags |= MF_NOGRAVITY;
 			}
@@ -2823,6 +2824,7 @@ FUNC(LS_SetPlayerProperty)
 			it->player->cheats &= ~mask;
 			if (arg2 == PROP_FLY)
 			{
+				it->flags7 &= ~MF7_FLYCHEAT;
 				it->flags2 &= ~MF2_FLY;
 				it->flags &= ~MF_NOGRAVITY;
 			}
diff --git a/src/p_mobj.cpp b/src/p_mobj.cpp
index ce9fe722a..b27c79d91 100644
--- a/src/p_mobj.cpp
+++ b/src/p_mobj.cpp
@@ -4477,7 +4477,7 @@ APlayerPawn *P_SpawnPlayer (FPlayerStart *mthing, int playernum, int flags)
 	p->mo->ResetAirSupply(false);
 	p->Uncrouch();
 	p->MinPitch = p->MaxPitch = 0;	// will be filled in by PostBeginPlay()/netcode
-	p->cheats &= ~CF_FLY;
+
 
 	p->velx = p->vely = 0;		// killough 10/98: initialize bobbing to 0.