From b289de26a6a21f911e31e592149070c95b6e50b0 Mon Sep 17 00:00:00 2001
From: SNMetamorph <25657591+SNMetamorph@users.noreply.github.com>
Date: Tue, 4 May 2021 13:11:55 +0400
Subject: [PATCH] engine: client: added cvar cl_nointerp for disabling
 interpolation

---
 engine/client/cl_frame.c | 10 ++++++++++
 engine/client/cl_main.c  |  4 +++-
 engine/client/client.h   |  1 +
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/engine/client/cl_frame.c b/engine/client/cl_frame.c
index e16eaea1..2bb6a9c2 100644
--- a/engine/client/cl_frame.c
+++ b/engine/client/cl_frame.c
@@ -131,6 +131,9 @@ some ents will be ignore lerping
 */
 qboolean CL_EntityIgnoreLerp( cl_entity_t *e )
 {
+	if( cl_nointerp->value > 0.f )
+		return true;
+
 	if( e->model && e->model->type == mod_alias )
 		return false;
 
@@ -529,6 +532,13 @@ void CL_ComputePlayerOrigin( cl_entity_t *ent )
 	if( !ent->player || ent->index == ( cl.playernum + 1 ))
 		return;
 
+	if( cl_nointerp->value > 0.f )
+	{
+		VectorCopy( ent->curstate.angles, ent->angles );
+		VectorCopy( ent->curstate.origin, ent->origin );
+		return;
+	}
+
 	if( cls.demoplayback == DEMO_QUAKE1 )
 	{
 		// quake lerping is easy
diff --git a/engine/client/cl_main.c b/engine/client/cl_main.c
index d8c3bc9a..0e475b4d 100644
--- a/engine/client/cl_main.c
+++ b/engine/client/cl_main.c
@@ -63,6 +63,7 @@ convar_t	*cl_updaterate;
 convar_t	*cl_showevents;
 convar_t	*cl_cmdrate;
 convar_t	*cl_interp;
+convar_t	*cl_nointerp;
 convar_t	*cl_dlmax;
 convar_t	*cl_upmax;
 
@@ -2844,7 +2845,8 @@ void CL_InitLocal( void )
 	Cvar_Get( "team", "", FCVAR_USERINFO, "player team" );
 	Cvar_Get( "skin", "", FCVAR_USERINFO, "player skin" );
 
-	cl_nosmooth = Cvar_Get( "cl_nosmooth", "0", FCVAR_ARCHIVE, "disable smooth up stair climbing and interpolate position in multiplayer" );
+	cl_nosmooth = Cvar_Get( "cl_nosmooth", "0", FCVAR_ARCHIVE, "disable smooth up stair climbing" );
+	cl_nointerp = Cvar_Get( "cl_nointerp", "0", FCVAR_CLIENTDLL, "disable interpolation of entities and players" );
 	cl_smoothtime = Cvar_Get( "cl_smoothtime", "0", FCVAR_ARCHIVE, "time to smooth up" );
 	cl_cmdbackup = Cvar_Get( "cl_cmdbackup", "10", FCVAR_ARCHIVE, "how many additional history commands are sent" );
 	cl_cmdrate = Cvar_Get( "cl_cmdrate", "30", FCVAR_ARCHIVE, "Max number of command packets sent to server per second" );
diff --git a/engine/client/client.h b/engine/client/client.h
index 4db8f29a..4dcdd6dd 100644
--- a/engine/client/client.h
+++ b/engine/client/client.h
@@ -658,6 +658,7 @@ extern convar_t	*cl_nopred;
 extern convar_t	*cl_timeout;
 extern convar_t	*cl_nodelta;
 extern convar_t	*cl_interp;
+extern convar_t *cl_nointerp;
 extern convar_t	*cl_showerror;
 extern convar_t	*cl_nosmooth;
 extern convar_t	*cl_smoothtime;