Added silent line teleport prediction

- Allow activation of line teleport specials during prediction
- Moved prediction functions to improve uncapped framerates

src/d_main.cpp

@@ -756,9 +756,9 @@ void D_Display ()
 			}
 			screen->SetBlendingRect(viewwindowx, viewwindowy,
 				viewwindowx + viewwidth, viewwindowy + viewheight);
-			P_PredictPlayer(&players[consoleplayer]);
+			//P_PredictPlayer(&players[consoleplayer]);
 			Renderer->RenderView(&players[consoleplayer]);
-			P_UnPredictPlayer();
+			//P_UnPredictPlayer();
 			if ((hw2d = screen->Begin2D(viewactive)))
 			{
 				// Redraw everything every frame when using 2D accel

src/p_map.cpp

@@ -380,7 +380,9 @@ bool P_TeleportMove(AActor *thing, fixed_t x, fixed_t y, fixed_t z, bool telefra
 		// ... and some items can never be telefragged while others will be telefragged by everything that teleports upon them.
 		if ((StompAlwaysFrags && !(th->flags6 & MF6_NOTELEFRAG)) || (th->flags7 & MF7_ALWAYSTELEFRAG))
 		{
-			P_DamageMobj(th, thing, thing, TELEFRAG_DAMAGE, NAME_Telefrag, DMG_THRUSTLESS);
+			// Don't actually damage if predicting a teleport
+			if (thing->player == NULL || !(thing->player->cheats & CF_PREDICTING))
+				P_DamageMobj(th, thing, thing, TELEFRAG_DAMAGE, NAME_Telefrag, DMG_THRUSTLESS);
 			continue;
 		}
 		return false;
@@ -1981,13 +1983,6 @@ bool P_TryMove(AActor *thing, fixed_t x, fixed_t y,
 		thing->AdjustFloorClip();
 	}
 
-	// [RH] Don't activate anything if just predicting
-	if (thing->player && (thing->player->cheats & CF_PREDICTING))
-	{
-		thing->flags6 &= ~MF6_INTRYMOVE;
-		return true;
-	}
-
 	// if any special lines were hit, do the effect
 	if (!(thing->flags & (MF_TELEPORT | MF_NOCLIP)))
 	{
@@ -1998,7 +1993,11 @@ bool P_TryMove(AActor *thing, fixed_t x, fixed_t y,
 			oldside = P_PointOnLineSide(oldx, oldy, ld);
 			if (side != oldside && ld->special && !(thing->flags6 & MF6_NOTRIGGER))
 			{
-				if (thing->player)
+				if (thing->player && (thing->player->cheats & CF_PREDICTING))
+				{
+					P_PredictLine(ld, thing, oldside, SPAC_Cross);
+				}
+				else if (thing->player)
 				{
 					P_ActivateLine(ld, thing, oldside, SPAC_Cross);
 				}
@@ -2024,6 +2023,13 @@ bool P_TryMove(AActor *thing, fixed_t x, fixed_t y,
 		}
 	}
 
+	// [RH] Don't activate anything if just predicting
+	if (thing->player && (thing->player->cheats & CF_PREDICTING))
+	{
+		thing->flags6 &= ~MF6_INTRYMOVE;
+		return true;
+	}
+
 	// [RH] Check for crossing fake floor/ceiling
 	newsec = thing->Sector;
 	if (newsec->heightsec && oldsec->heightsec && newsec->SecActTarget)

src/p_spec.cpp

@@ -73,6 +73,7 @@
 static FRandom pr_playerinspecialsector ("PlayerInSpecialSector");
 void P_SetupPortals();
 
+EXTERN_CVAR(Bool, cl_predict_specials)
 
 IMPLEMENT_POINTY_CLASS (DScroller)
  DECLARE_POINTER (m_Interpolations[0])
@@ -408,6 +409,47 @@ bool P_TestActivateLine (line_t *line, AActor *mo, int side, int activationType)
 	return true;
 }
 
+//============================================================================
+//
+// P_PredictLine
+//
+//============================================================================
+
+bool P_PredictLine(line_t *line, AActor *mo, int side, int activationType)
+{
+	int lineActivation;
+	INTBOOL buttonSuccess;
+	BYTE special;
+
+	// Only predict a very specifc section of specials
+	if (line->special != Teleport_Line)
+	{
+		return false;
+	}
+
+	if (!P_TestActivateLine(line, mo, side, activationType) || !cl_predict_specials)
+	{
+		return false;
+	}
+
+	if (line->locknumber > 0) return false;
+	lineActivation = line->activation;
+	buttonSuccess = false;
+	buttonSuccess = P_ExecuteSpecial(line->special,
+		line, mo, side == 1, line->args[0],
+		line->args[1], line->args[2],
+		line->args[3], line->args[4]);
+
+	special = line->special;
+
+	// end of changed code
+	if (developer && buttonSuccess)
+	{
+		Printf("Line special %d predicted on line %i\n", special, int(line - lines));
+	}
+	return true;
+}
+
 //
 // P_PlayerInSpecialSector
 // Called every tic frame

src/p_spec.h

@@ -166,6 +166,7 @@ void	P_UpdateSpecials (void);
 // when needed
 bool	P_ActivateLine (line_t *ld, AActor *mo, int side, int activationType);
 bool	P_TestActivateLine (line_t *ld, AActor *mo, int side, int activationType);
+bool	P_PredictLine (line_t *ld, AActor *mo, int side, int activationType);
 
 void 	P_PlayerInSpecialSector (player_t *player, sector_t * sector=NULL);
 void	P_PlayerOnSpecialFlat (player_t *player, int floorType);

src/p_user.cpp

@@ -62,6 +62,7 @@ static FRandom pr_skullpop ("SkullPop");
 
 // Variables for prediction
 CVAR (Bool, cl_noprediction, false, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
+CVAR(Bool, cl_predict_specials, true, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
 static player_t PredictionPlayerBackup;
 static BYTE PredictionActorBackup[sizeof(AActor)];
 static TArray<sector_t *> PredictionTouchingSectorsBackup;
@@ -2722,14 +2723,16 @@ void P_PredictPlayer (player_t *player)
 	}
 	act->BlockNode = NULL;
 
+	bool NoInterpolateOld = R_GetViewInterpolationStatus();
 	for (int i = gametic; i < maxtic; ++i)
 	{
+		if (!NoInterpolateOld)
+			R_RebuildViewInterpolation(player);
+
 		player->cmd = localcmds[i % LOCALCMDTICS];
 		P_PlayerThink (player);
 		player->mo->Tick ();
 	}
-
-	S_UpdateSounds(players[consoleplayer].camera);	// move positional sounds
 }
 
 extern msecnode_t *P_AddSecnode (sector_t *s, AActor *thing, msecnode_t *nextnode);

src/r_utility.cpp

@@ -729,6 +729,46 @@ void R_ClearPastViewer (AActor *actor)
 	}
 }
 
+//==========================================================================
+//
+// R_RebuildViewInterpolation
+//
+//==========================================================================
+
+void R_RebuildViewInterpolation(player_t *player)
+{
+	InterpolationViewer *iview;
+	if (NoInterpolateView)
+	{
+		if (player != NULL && player->camera != NULL)
+		{
+			iview = FindPastViewer(player->camera);
+		}
+
+		if (iview == NULL)
+			return;
+
+		NoInterpolateView = false;
+		iview->oviewx = iview->nviewx;
+		iview->oviewy = iview->nviewy;
+		iview->oviewz = iview->nviewz;
+		iview->oviewpitch = iview->nviewpitch;
+		iview->oviewangle = iview->nviewangle;
+	}
+}
+
+//==========================================================================
+//
+// R_GetViewInterpolationStatus
+//
+//==========================================================================
+
+bool R_GetViewInterpolationStatus()
+{
+	return NoInterpolateView;
+}
+
+
 //==========================================================================
 //
 // R_SetupFrame

src/r_utility.h

@@ -61,6 +61,8 @@ inline angle_t R_PointToAngle (fixed_t x, fixed_t y) { return R_PointToAngle2 (v
 subsector_t *R_PointInSubsector (fixed_t x, fixed_t y);
 fixed_t R_PointToDist2 (fixed_t dx, fixed_t dy);
 void R_ResetViewInterpolation ();
+void R_RebuildViewInterpolation(player_t *player);
+bool R_GetViewInterpolationStatus();
 void R_SetViewSize (int blocks);
 void R_SetFOV (float fov);
 float R_GetFOV ();