From 9e68983b4469906102b7d810fe02e1756d5a3540 Mon Sep 17 00:00:00 2001
From: Edward Richardson <Edward850@crantime.org>
Date: Tue, 26 Aug 2014 22:29:39 +1200
Subject: [PATCH] Added standard teleports to line prediction

- Added standard teleports to line prediction
- Menudef for line special prediction
---
 src/p_spec.cpp            |  3 ++-
 src/p_teleport.cpp        | 27 +++++++++++++++++----------
 wadsrc/static/menudef.txt |  1 +
 3 files changed, 20 insertions(+), 11 deletions(-)

diff --git a/src/p_spec.cpp b/src/p_spec.cpp
index 4ac1c59d9..d58062a7e 100644
--- a/src/p_spec.cpp
+++ b/src/p_spec.cpp
@@ -422,7 +422,8 @@ bool P_PredictLine(line_t *line, AActor *mo, int side, int activationType)
 	BYTE special;
 
 	// Only predict a very specifc section of specials
-	if (line->special != Teleport_Line)
+	if (line->special != Teleport_Line &&
+		line->special != Teleport)
 	{
 		return false;
 	}
diff --git a/src/p_teleport.cpp b/src/p_teleport.cpp
index 50470d9eb..b64c04a5a 100644
--- a/src/p_teleport.cpp
+++ b/src/p_teleport.cpp
@@ -96,6 +96,8 @@ void P_SpawnTeleportFog(fixed_t x, fixed_t y, fixed_t z, int spawnid)
 bool P_Teleport (AActor *thing, fixed_t x, fixed_t y, fixed_t z, angle_t angle,
 				 bool useFog, bool sourceFog, bool keepOrientation, bool bHaltVelocity, bool keepHeight)
 {
+	bool predicting = (thing->player && (thing->player->cheats & CF_PREDICTING));
+
 	fixed_t oldx;
 	fixed_t oldy;
 	fixed_t oldz;
@@ -181,7 +183,7 @@ bool P_Teleport (AActor *thing, fixed_t x, fixed_t y, fixed_t z, angle_t angle,
 		angle = thing->angle;
 	}
 	// Spawn teleport fog at source and destination
-	if (sourceFog)
+	if (sourceFog && !predicting)
 	{
 		fixed_t fogDelta = thing->flags & MF_MISSILE ? 0 : TELEFOGHEIGHT;
 		AActor *fog = Spawn<ATeleportFog> (oldx, oldy, oldz + fogDelta, ALLOW_REPLACE);
@@ -189,11 +191,14 @@ bool P_Teleport (AActor *thing, fixed_t x, fixed_t y, fixed_t z, angle_t angle,
 	}
 	if (useFog)
 	{
-		fixed_t fogDelta = thing->flags & MF_MISSILE ? 0 : TELEFOGHEIGHT;
-		an = angle >> ANGLETOFINESHIFT;
-		AActor *fog = Spawn<ATeleportFog> (x + 20*finecosine[an],
-			y + 20*finesine[an], thing->z + fogDelta, ALLOW_REPLACE);
-		fog->target = thing;
+		if (!predicting)
+		{
+			fixed_t fogDelta = thing->flags & MF_MISSILE ? 0 : TELEFOGHEIGHT;
+			an = angle >> ANGLETOFINESHIFT;
+			AActor *fog = Spawn<ATeleportFog>(x + 20 * finecosine[an],
+				y + 20 * finesine[an], thing->z + fogDelta, ALLOW_REPLACE);
+			fog->target = thing;
+		}
 		if (thing->player)
 		{
 			// [RH] Zoom player's field of vision
@@ -226,7 +231,7 @@ bool P_Teleport (AActor *thing, fixed_t x, fixed_t y, fixed_t z, angle_t angle,
 	return true;
 }
 
-static AActor *SelectTeleDest (int tid, int tag)
+static AActor *SelectTeleDest (int tid, int tag, bool norandom)
 {
 	AActor *searcher;
 
@@ -276,7 +281,7 @@ static AActor *SelectTeleDest (int tid, int tag)
 		}
 		else
 		{
-			if (count != 1)
+			if (count != 1 && !norandom)
 			{
 				count = 1 + (pr_teleport() % count);
 			}
@@ -323,6 +328,8 @@ static AActor *SelectTeleDest (int tid, int tag)
 bool EV_Teleport (int tid, int tag, line_t *line, int side, AActor *thing, bool fog,
 				  bool sourceFog, bool keepOrientation, bool haltVelocity, bool keepHeight)
 {
+	bool predicting = (thing->player && (thing->player->cheats & CF_PREDICTING));
+
 	AActor *searcher;
 	fixed_t z;
 	angle_t angle = 0;
@@ -342,7 +349,7 @@ bool EV_Teleport (int tid, int tag, line_t *line, int side, AActor *thing, bool
 	{ // Don't teleport if hit back of line, so you can get out of teleporter.
 		return 0;
 	}
-	searcher = SelectTeleDest (tid, tag);
+	searcher = SelectTeleDest(tid, tag, predicting);
 	if (searcher == NULL)
 	{
 		return false;
@@ -390,7 +397,7 @@ bool EV_Teleport (int tid, int tag, line_t *line, int side, AActor *thing, bool
 			thing->velx = FixedMul(velx, c) - FixedMul(vely, s);
 			thing->vely = FixedMul(vely, c) + FixedMul(velx, s);
 		}
-		if ((velx | vely) == 0 && thing->player != NULL && thing->player->mo == thing)
+		if ((velx | vely) == 0 && thing->player != NULL && thing->player->mo == thing && !predicting)
 		{
 			thing->player->mo->PlayIdle ();
 		}
diff --git a/wadsrc/static/menudef.txt b/wadsrc/static/menudef.txt
index 496f1e066..6d313faf1 100644
--- a/wadsrc/static/menudef.txt
+++ b/wadsrc/static/menudef.txt
@@ -1611,6 +1611,7 @@ OptionMenu NetworkOptions
 	Title "NETWORK OPTIONS"
 	StaticText "Local options", 1
 	Option "Movement prediction",		"cl_noprediction", "OffOn"
+	Option "Predict line actions",		"cl_predict_specials", "OnOff"
 	StaticText " "
 	StaticText "Host options", 1
 	Option "Extra Tics",				"net_extratic", "ExtraTicMode"