From 9ac6d4c6e4eda02d37043f8d53a8db23ef8531f0 Mon Sep 17 00:00:00 2001
From: Kamay Xutax <admin@xutaxkamay.com>
Date: Tue, 23 Jan 2024 14:32:02 +0100
Subject: [PATCH] Add weapon_accuracy_nospread & posparam lagcomp

---
 game/server/player_lagcompensation.cpp   | 47 ++++++++++++++++++++++++
 game/shared/cstrike/cs_player_shared.cpp |  7 ++++
 2 files changed, 54 insertions(+)

diff --git a/game/server/player_lagcompensation.cpp b/game/server/player_lagcompensation.cpp
index 1bec034dc8..fcee4bbc42 100644
--- a/game/server/player_lagcompensation.cpp
+++ b/game/server/player_lagcompensation.cpp
@@ -24,6 +24,7 @@
 #define LC_ANGLES_CHANGED	(1<<9)
 #define LC_SIZE_CHANGED		(1<<10)
 #define LC_ANIMATION_CHANGED (1<<11)
+#define LC_POSE_PARAMS_CHANGED (1<<12)
 
 static ConVar sv_lagcompensation_teleport_dist( "sv_lagcompensation_teleport_dist", "64", FCVAR_DEVELOPMENTONLY | FCVAR_CHEAT, "How far a player got moved by game code before we can't lag compensate their position back" );
 #define LAG_COMPENSATION_EPS_SQR ( 0.1f * 0.1f )
@@ -41,6 +42,7 @@ ConVar sv_unlag_fixstuck( "sv_unlag_fixstuck", "0", FCVAR_DEVELOPMENTONLY, "Disa
 // Purpose: 
 //-----------------------------------------------------------------------------
 #define MAX_LAYER_RECORDS (CBaseAnimatingOverlay::MAX_OVERLAYS)
+#define MAX_POSE_PARAMETERS (CBaseAnimating::NUM_POSEPAREMETERS)
 
 struct LayerRecord
 {
@@ -112,6 +114,7 @@ public:
 	LayerRecord				m_layerRecords[MAX_LAYER_RECORDS];
 	int						m_masterSequence;
 	float					m_masterCycle;
+	float					m_poseParameters[MAX_POSE_PARAMETERS];
 };
 
 
@@ -313,6 +316,15 @@ void CLagCompensationManager::FrameUpdatePostEntityThink()
 		}
 		record.m_masterSequence = pPlayer->GetSequence();
 		record.m_masterCycle = pPlayer->GetCycle();
+
+		CStudioHdr *hdr = pPlayer->GetModelPtr();
+		if( hdr )
+		{
+			for( int paramIndex = 0; paramIndex < hdr->GetNumPoseParameters(); paramIndex++ )
+			{
+				record.m_poseParameters[paramIndex] = pPlayer->GetPoseParameter( paramIndex );
+			}
+		}
 	}
 
 	//Clear the current player.
@@ -704,6 +716,27 @@ void CLagCompensationManager::BacktrackPlayer( CBasePlayer *pPlayer, float flTar
 		}
 	}
 	
+	// Now do pose parameters
+	CStudioHdr *hdr = pPlayer->GetModelPtr();
+	if( hdr )
+	{
+		for( int paramIndex = 0; paramIndex < hdr->GetNumPoseParameters(); paramIndex++ )
+		{
+			float poseParameter = record->m_poseParameters[paramIndex];
+			if( (frac > 0.0f)  &&  interpolationAllowed )
+			{
+				// These could wrap like cycles, but there's no way to know. In the most common case
+				// (move_x/move_y) it's correct to just lerp. Interpolation almost never happens anyways.
+				float prevPoseParameter = prevRecord->m_poseParameters[paramIndex];
+				pPlayer->SetPoseParameter( paramIndex, Lerp( frac, poseParameter, prevPoseParameter ) );
+			}
+			else
+			{
+				pPlayer->SetPoseParameter( paramIndex, poseParameter );
+			}
+		}
+	}
+
 	if ( !flags )
 		return; // we didn't change anything
 
@@ -823,6 +856,20 @@ void CLagCompensationManager::FinishLagCompensation( CBasePlayer *player )
 			}
 		}
 
+		if( restore->m_fFlags & LC_POSE_PARAMS_CHANGED )
+		{
+			restoreSimulationTime = true;
+
+			CStudioHdr *hdr = pPlayer->GetModelPtr();
+			if( hdr )
+			{
+				for( int paramIndex = 0; paramIndex < hdr->GetNumPoseParameters(); paramIndex++ )
+				{
+					pPlayer->SetPoseParameter( paramIndex, restore->m_poseParameters[paramIndex] );
+				}
+			}
+		}
+
 		if ( restoreSimulationTime )
 		{
 			pPlayer->SetSimulationTime( restore->m_flSimulationTime );
diff --git a/game/shared/cstrike/cs_player_shared.cpp b/game/shared/cstrike/cs_player_shared.cpp
index e0f3d91d63..c35a4da46e 100644
--- a/game/shared/cstrike/cs_player_shared.cpp
+++ b/game/shared/cstrike/cs_player_shared.cpp
@@ -34,6 +34,7 @@
 
 ConVar sv_showimpacts("sv_showimpacts", "0", FCVAR_REPLICATED, "Shows client (red) and server (blue) bullet impact point (1=both, 2=client-only, 3=server-only)" );
 ConVar sv_showplayerhitboxes( "sv_showplayerhitboxes", "0", FCVAR_REPLICATED, "Show lag compensated hitboxes for the specified player index whenever a player fires." );
+ConVar weapon_accuracy_nospread( "weapon_accuracy_nospread", "0", FCVAR_REPLICATED );
 
 #define	CS_MASK_SHOOT (MASK_SOLID|CONTENTS_DEBRIS)
 
@@ -354,6 +355,12 @@ void CCSPlayer::FireBullet(
 	if ( !pevAttacker )
 		pevAttacker = this;  // the default attacker is ourselves
 
+	if ( weapon_accuracy_nospread.GetBool() )
+	{
+		xSpread = 0.0f;
+		ySpread = 0.0f;
+	}
+
 	// add the spray
 	Vector vecDir = vecDirShooting + xSpread * vecRight + ySpread * vecUp;