From 32b166669e6028839f34b97fbbf3b0240d98f4be Mon Sep 17 00:00:00 2001
From: Eidolon <furyhunter600@gmail.com>
Date: Tue, 17 May 2022 19:57:31 -0500
Subject: [PATCH] Don't interpolate during net lag

---
 src/d_clisrv.c | 16 ++++++++++++++++
 src/d_clisrv.h |  3 +++
 src/d_main.c   |  2 +-
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/d_clisrv.c b/src/d_clisrv.c
index 3068f2314..4cd6333c5 100644
--- a/src/d_clisrv.c
+++ b/src/d_clisrv.c
@@ -114,6 +114,9 @@ static INT16 consistancy[BACKUPTICS];
 static UINT8 player_joining = false;
 UINT8 hu_redownloadinggamestate = 0;
 
+// true when a player is connecting or disconnecting so that the gameplay has stopped in its tracks
+boolean hu_stopped = false;
+
 UINT8 adminpassmd5[16];
 boolean adminpasswordset = false;
 
@@ -5259,8 +5262,16 @@ boolean TryRunTics(tic_t realtics)
 
 	ticking = neededtic > gametic;
 
+	if (ticking)
+	{
+		if (realtics)
+			hu_stopped = false;
+	}
+
 	if (player_joining)
 	{
+		if (realtics)
+			hu_stopped = true;
 		return false;
 	}
 
@@ -5300,6 +5311,11 @@ boolean TryRunTics(tic_t realtics)
 					break;
 			}
 	}
+	else
+	{
+		if (realtics)
+			hu_stopped = true;
+	}
 
 	return ticking;
 }
diff --git a/src/d_clisrv.h b/src/d_clisrv.h
index c75f7f0bf..e07864122 100644
--- a/src/d_clisrv.h
+++ b/src/d_clisrv.h
@@ -458,4 +458,7 @@ extern UINT8 hu_redownloadinggamestate;
 
 extern UINT8 adminpassmd5[16];
 extern boolean adminpasswordset;
+
+extern boolean hu_stopped;
+
 #endif
diff --git a/src/d_main.c b/src/d_main.c
index 3786efd07..0ae48c927 100644
--- a/src/d_main.c
+++ b/src/d_main.c
@@ -853,7 +853,7 @@ void D_SRB2Loop(void)
 
 			renderdeltatics = FLOAT_TO_FIXED(deltatics);
 
-			if (!(paused || P_AutoPause()))
+			if (!(paused || P_AutoPause()) && !hu_stopped)
 			{
 				rendertimefrac = g_time.timefrac;
 			}