Add notes about new holdaim

rehlds/engine/sv_user.cpp

@@ -1042,6 +1042,63 @@ void SV_RunCmd(usercmd_t *ucmd, int random_seed)
 
 	if (!host_client->fakeclient)
 		SV_RestoreMove(host_client);
+
+	// If we have to restore the view angle then do so right now
+
+	// TODO: Implement: in `player.h` & `player.cpp`
+	/*
+		QAngle	m_qangLockViewangles;
+		int		m_iLockViewanglesTickNumber;
+
+		int		GetLockViewanglesTickNumber() const { return m_iLockViewanglesTickNumber; }
+		QAngle	GetLockViewanglesData() const { return m_qangLockViewangles; }
+
+	////////////
+		void CCSPlayer::NoteWeaponFired()
+		{
+			Assert( m_pCurrentCommand );
+			if( m_pCurrentCommand )
+			{
+				m_iLastWeaponFireUsercmd = m_pCurrentCommand->command_number;
+			}
+
+			// Remember the tickcount when the weapon was fired and lock viewangles here!
+			if ( m_iLockViewanglesTickNumber != gpGlobals->tickcount )
+			{
+				m_iLockViewanglesTickNumber = gpGlobals->tickcount;
+				m_qangLockViewangles = pl.v_angle;
+			}
+		}
+	*/
+
+	/**
+	Implement in CCSPlayer::FireBullet:
+	
+	// Let the player remember the usercmd he fired a weapon on. Assists in making decisions about lag compensation.
+	if ( pPlayer )
+		pPlayer->NoteWeaponFired();
+
+
+	if ( bBulletHitPlayer && !bShotHitTeammate )
+	{	// Guarantee that the bullet that hit an enemy trumps the player viewangles
+		// that are locked in for the duration of the server simulation ticks
+		m_iLockViewanglesTickNumber = gpGlobals->tickcount;
+		m_qangLockViewangles = pl.v_angle;
+	}
+	*/
+
+	/* 
+	Implement in SV_RunCmd():
+
+	// player->IsBot() == sv_player->fakeclient
+	// tickcount == m_System->GetTick()
+
+	if ( !player->IsBot() &&
+	( gpGlobals->tickcount - player->GetLockViewanglesTickNumber() < sv_maxusrcmdprocessticks_holdaim.value ) )
+	{
+		player->pl.v_angle = player->GetLockViewanglesData();
+	}
+	*/
 }
 
 int SV_ValidateClientCommand(char *pszCommand)