IVEngineServer

This article has no links to other VDC articles. Please help improve this article by adding links that are relevant to the context within the existing text.
January 2024

This interface allows various important functions to be called on the server.

//-----------------------------------------------------------------------------
// Purpose: Interface the engine exposes to the game DLL
//-----------------------------------------------------------------------------
abstract_class IVEngineServer
{
public:
	// Tell engine to change level ( "changelevel s1\n" or "changelevel2 s1 s2\n" )
	virtual void		ChangeLevel( const char *s1, const char *s2 ) = 0;
	
	// Ask engine whether the specified map is a valid map file (exists and has valid version number).
	virtual int			IsMapValid( const char *filename ) = 0;
	
	// Is this a dedicated server?
	virtual bool		IsDedicatedServer( void ) = 0;
	
	// Is in Hammer editing mode?
	virtual int			IsInEditMode( void ) = 0;
	
	// Add to the server/client lookup/precache table, the specified string is given a unique index
	// NOTE: The indices for PrecacheModel are 1 based
	//  a 0 returned from those methods indicates the model or sound was not correctly precached
	// However, generic and decal are 0 based
	// If preload is specified, the file is loaded into the server/client's cache memory before level startup, otherwise
	//  it'll only load when actually used (which can cause a disk i/o hitch if it occurs during play of a level).
	virtual int			PrecacheModel( const char *s, bool preload = false ) = 0;
	virtual int			PrecacheSentenceFile( const char *s, bool preload = false ) = 0;
	virtual int			PrecacheDecal( const char *name, bool preload = false ) = 0;
	virtual int			PrecacheGeneric( const char *s, bool preload = false ) = 0;

	// Check's if the name is precached, but doesn't actually precache the name if not...
	virtual bool		IsModelPrecached( char const *s ) const = 0;
	virtual bool		IsDecalPrecached( char const *s ) const = 0;
	virtual bool		IsGenericPrecached( char const *s ) const = 0;

	// Note that sounds are precached using the IEngineSound interface

	// Special purpose PVS checking
	// Get the cluster # for the specified position
	virtual int			GetClusterForOrigin( const Vector &org ) = 0;
	// Get the PVS bits for a specified cluster and copy the bits into outputpvs.  Returns the number of bytes needed to pack the PVS
	virtual int			GetPVSForCluster( int cluster, int outputpvslength, unsigned char *outputpvs ) = 0;
	// Check whether the specified origin is inside the specified PVS
	virtual bool		CheckOriginInPVS( const Vector &org, const unsigned char *checkpvs, int checkpvssize ) = 0;
	// Check whether the specified worldspace bounding box is inside the specified PVS
	virtual bool		CheckBoxInPVS( const Vector &mins, const Vector &maxs, const unsigned char *checkpvs, int checkpvssize ) = 0;

	// Returns the server assigned userid for this player.  Useful for logging frags, etc.  
	//  returns -1 if the edict couldn't be found in the list of players.
	virtual int			GetPlayerUserId( const edict_t *e ) = 0; 
	virtual const char	*GetPlayerNetworkIDString( const edict_t *e ) = 0;

	// Return the current number of used edict slots
	virtual int			GetEntityCount( void ) = 0;
	// Given an edict, returns the entity index
	virtual int			IndexOfEdict( const edict_t *pEdict ) = 0;
	// Given and entity index, returns the corresponding edict pointer
	virtual edict_t		*PEntityOfEntIndex( int iEntIndex ) = 0;
	
	// Get stats info interface for a client netchannel
	virtual INetChannelInfo* GetPlayerNetInfo( int playerIndex ) = 0;
	
	// Allocate space for string and return index/offset of string in global string list
	// If iForceEdictIndex is not -1, then it will return the edict with that index. If that edict index
	// is already used, it'll return null.
	virtual edict_t		*CreateEdict( int iForceEdictIndex = -1 ) = 0;
	// Remove the specified edict and place back into the free edict list
	virtual void		RemoveEdict( edict_t *e ) = 0;
	
	// Memory allocation for entity class data
	virtual void		*PvAllocEntPrivateData( long cb ) = 0;
	virtual void		FreeEntPrivateData( void *pEntity ) = 0;

	// Save/restore uses a special memory allocator (which zeroes newly allocated memory, etc.)
	virtual void		*SaveAllocMemory( size_t num, size_t size ) = 0;
	virtual void		SaveFreeMemory( void *pSaveMem ) = 0;
	
	// Emit an ambient sound associated with the specified entity
	virtual void		EmitAmbientSound( int entindex, const Vector &pos, const char *samp, float vol, soundlevel_t soundlevel, int fFlags, int pitch, float delay = 0.0f ) = 0;

	// Fade out the client's volume level toward silence (or fadePercent)
	virtual void        FadeClientVolume( const edict_t *pEdict, float fadePercent, float fadeOutSeconds, float holdTime, float fadeInSeconds ) = 0;
	
	// Sentences / sentence groups
	virtual int			SentenceGroupPick( int groupIndex, char *name, int nameBufLen ) = 0;
	virtual int			SentenceGroupPickSequential( int groupIndex, char *name, int nameBufLen, int sentenceIndex, int reset ) = 0;
	virtual int			SentenceIndexFromName( const char *pSentenceName ) = 0;
	virtual const char *SentenceNameFromIndex( int sentenceIndex ) = 0;
	virtual int			SentenceGroupIndexFromName( const char *pGroupName ) = 0;
	virtual const char *SentenceGroupNameFromIndex( int groupIndex ) = 0;
	virtual float		SentenceLength( int sentenceIndex ) = 0;

	// Issue a command to the command parser as if it was typed at the server console.	
	virtual void		ServerCommand( const char *str ) = 0;
	// Execute any commands currently in the command parser immediately (instead of once per frame)
	virtual void		ServerExecute( void ) = 0;
	// Issue the specified command to the specified client (mimics that client typing the command at the console).
	virtual void		ClientCommand( edict_t *pEdict, const char *szFmt, ... ) = 0;

	// Set the lightstyle to the specified value and network the change to any connected clients.  Note that val must not 
	//  change place in memory (use MAKE_STRING) for anything that's not compiled into your mod.
	virtual void		LightStyle( int style, const char *val ) = 0;

	// Project a static decal onto the specified entity / model (for level placed decals in the .bsp)
	virtual void		StaticDecal( const Vector &originInEntitySpace, int decalIndex, int entityIndex, int modelIndex, bool lowpriority ) = 0;
	
	// Given the current PVS(or PAS) and origin, determine which players should hear/receive the message
	virtual void		Message_DetermineMulticastRecipients( bool usepas, const Vector& origin, CBitVec< ABSOLUTE_PLAYER_LIMIT >& playerbits ) = 0;

	// Begin a message from a server side entity to its client side counterpart (func_breakable glass, e.g.)
	virtual bf_write	*EntityMessageBegin( int ent_index, ServerClass * ent_class, bool reliable ) = 0;
	// Begin a usermessage from the server to the client .dll
	virtual bf_write	*UserMessageBegin( IRecipientFilter *filter, int msg_type ) = 0;
	// Finish the Entity or UserMessage and dispatch to network layer
	virtual void		MessageEnd( void ) = 0;

	// Print szMsg to the client console.
	virtual void		ClientPrintf( edict_t *pEdict, const char *szMsg ) = 0;

	// SINGLE PLAYER/LISTEN SERVER ONLY (just matching the client .dll api for this)
	// Prints the formatted string to the notification area of the screen ( down the right hand edge
	//  numbered lines starting at position 0
	virtual void		Con_NPrintf( int pos, const char *fmt, ... ) = 0;
	// SINGLE PLAYER/LISTEN SERVER ONLY(just matching the client .dll api for this)
	// Similar to Con_NPrintf, but allows specifying custom text color and duration information
	virtual void		Con_NXPrintf( const struct con_nprint_s *info, const char *fmt, ... ) = 0;

	// For ConCommand parsing or parsing client commands issued by players typing at their console
	// Retrieves the raw command string (untokenized)
	virtual const char	*Cmd_Args( void ) = 0;		
	// Returns the number of tokens in the command string
	virtual int			Cmd_Argc( void ) = 0;		
	// Retrieves a specified token
	virtual char		*Cmd_Argv( int argc ) = 0;	 

	// Change a specified player's "view entity" (i.e., use the view entity position/orientation for rendering the client view)
	virtual void		SetView( const edict_t *pClient, const edict_t *pViewent ) = 0;

	// Get a high precision timer for doing profiling work
	virtual float		Time( void ) = 0;

	// Set the player's crosshair angle
	virtual void		CrosshairAngle( const edict_t *pClient, float pitch, float yaw ) = 0;

	// Get the current game directory (hl2, tf2, hl1, cstrike, etc.)
	virtual void        GetGameDir( char *szGetGameDir, int maxlength ) = 0;

	// Used by AI node graph code to determine if .bsp and .ain files are out of date
	virtual int 		CompareFileTime( const char *filename1, const char *filename2, int *iCompare ) = 0;

	// Locks/unlocks the network string tables (.e.g, when adding bots to server, this needs to happen).
	// Be sure to reset the lock after executing your code!!!
	virtual bool		LockNetworkStringTables( bool lock ) = 0;

	// Create a bot with the given name.  Returns NULL if fake client can't be created
	virtual edict_t		*CreateFakeClient( const char *netname ) = 0;	

	// Get a convar keyvalue for s specified client
	virtual const char	*GetClientConVarValue( int clientIndex, const char *name ) = 0;
	
	// Parse a token from a file
	virtual const char	*ParseFile( const char *data, char *token, int maxlen ) = 0;
	// Copies a file
	virtual bool		CopyFile( const char *source, const char *destination ) = 0;

	// Reset the pvs, pvssize is the size in bytes of the buffer pointed to by pvs.
	// This should be called right before any calls to AddOriginToPVS
	virtual void		ResetPVS( byte *pvs, int pvssize ) = 0;
	// Merge the pvs bits into the current accumulated pvs based on the specified origin ( not that each pvs origin has an 8 world unit fudge factor )
	virtual void		AddOriginToPVS( const Vector &origin ) = 0;
	
	// Mark a specified area portal as open/closed.
	// Use SetAreaPortalStates if you want to set a bunch of them at a time.
	virtual void		SetAreaPortalState( int portalNumber, int isOpen ) = 0;
	
	// Queue a temp entity for transmission
	virtual void		PlaybackTempEntity( IRecipientFilter& filter, float delay, const void *pSender, const SendTable *pST, int classID  ) = 0;
	// Given a node number and the specified PVS, return with the node is in the PVS
	virtual int			CheckHeadnodeVisible( int nodenum, const byte *pvs, int vissize ) = 0;
	// Using area bits, cheeck whether area1 flows into area2 and vice versa (depends on area portal state)
	virtual int			CheckAreasConnected( int area1, int area2 ) = 0;
	// Given an origin, determine which area index the origin is within
	virtual int			GetArea( const Vector &origin ) = 0;
	// Get area portal bit set
	virtual void		GetAreaBits( int area, unsigned char *bits, int buflen ) = 0;
	// Given a view origin (which tells us the area to start looking in) and a portal key,
	// fill in the plane that leads out of this area (it points into whatever area it leads to).
	virtual bool		GetAreaPortalPlane( Vector const &vViewOrigin, int portalKey, VPlane *pPlane ) = 0;

	// Apply a modification to the terrain.
	virtual void		ApplyTerrainMod( TerrainModType type, CTerrainModParams const &params ) = 0;

	// Save/restore wrapper - FIXME:  At some point we should move this to it's own interface
	virtual bool		LoadGameState( char const *pMapName, bool createPlayers ) = 0;
	virtual void		LoadAdjacentEnts( const char *pOldLevel, const char *pLandmarkName ) = 0;
	virtual void		ClearSaveDir() = 0;

	// Get the pristine map entity lump string.  (e.g., used by CS to reload the map entities when restarting a round.)
	virtual const char*	GetMapEntitiesString() = 0;

	// Text message system -- lookup the text message of the specified name
	virtual client_textmessage_t *TextMessageGet( const char *pName ) = 0;

	// Print a message to the server log file
	virtual void		LogPrint( const char *msg ) = 0;

	// Builds PVS information for an entity
	virtual void		BuildEntityClusterList( edict_t *pEdict, PVSInfo_t *pPVSInfo ) = 0;

	// A solid entity moved, update spatial partition
	virtual void SolidMoved( edict_t *pSolidEnt, ICollideable *pSolidCollide, const Vector* pPrevAbsOrigin ) = 0;
	// A trigger entity moved, update spatial partition
	virtual void TriggerMoved( edict_t *pTriggerEnt ) = 0;
	
	// Create/destroy a custom spatial partition
	virtual ISpatialPartition *CreateSpatialPartition( const Vector& worldmin, const Vector& worldmax ) = 0;
	virtual void 		DestroySpatialPartition( ISpatialPartition * ) = 0;

	// Draw the brush geometry in the map into the scratch pad.
	// Flags is currently unused.
	virtual void		DrawMapToScratchPad( IScratchPad3D *pPad, unsigned long iFlags ) = 0;

	// This returns which entities, to the best of the server's knowledge, the client currently knows about.
	// This is really which entities were in the snapshot that this client last acked.
	// This returns a bit vector with one bit for each entity.
	//
	// USE WITH CARE. Whatever tick the client is really currently on is subject to timing and
	// ordering differences, so you should account for about a quarter-second discrepancy in here.
	// Also, this will return NULL if the client doesn't exist or if this client hasn't acked any frames yet.
	// 
	// iClientIndex is the CLIENT index, so if you use pPlayer->entindex(), subtract 1.
	virtual const CBitVec<MAX_EDICTS>* GetEntityTransmitBitsForClient( int iClientIndex ) = 0;
	
	// Is the game paused?
	virtual bool IsPaused() = 0;
	
	// Marks the filename for consistency checking.  This should be called after precaching the file.
	virtual void		ForceExactFile( const char *s ) = 0;
	virtual void		ForceModelBounds( const char *s, const Vector &mins, const Vector &maxs ) = 0;
	virtual void		ClearSaveDirAfterClientLoad() = 0;

	// Sets a USERINFO client ConVar for a fakeclient
	virtual void SetFakeClientConVarValue( edict_t *pEntity, const char *cvar, const char *value ) = 0;
	
	virtual void InsertServerCommand( const char *str ) = 0;

	// Marks the material (vmt file) for consistency checking.  If the client and server have different
	// contents for the file, the client's vmt can only use the VertexLitGeneric shader, and can only
	// contain $baseTexture and $bumpmap vars.
	virtual void		ForceSimpleMaterial( const char *s ) = 0;

	// Is the engine in Commentary mode?
	virtual int			IsInCommentaryMode( void ) = 0;
	

	// Mark some area portals as open/closed. It's more efficient to use this
	// than a bunch of individual SetAreaPortalState calls.
	virtual void		SetAreaPortalStates( const int *portalNumbers, const int *isOpen, int nPortals ) = 0;

	// Called when relevant edict state flags change.
	virtual void		NotifyEdictFlagsChange( int iEdict ) = 0;
	
	// Only valid during CheckTransmit. Also, only the PVS, networked areas, and
	// m_pTransmitInfo are valid in the returned strucutre.
	virtual const CCheckTransmitInfo* GetPrevCheckTransmitInfo( edict_t *pPlayerEdict ) = 0;
	
	virtual CSharedEdictChangeInfo* GetSharedEdictChangeInfo() = 0;

	// Tells the engine we can immdiately re-use all edict indices
	// even though we may not have waited enough time
	virtual void			AllowImmediateEdictReuse( ) = 0;

	// Returns true if the engine is an internal build. i.e. is using the internal bugreporter.
	virtual bool		IsInternalBuild( void ) = 0;

	virtual IChangeInfoAccessor *GetChangeAccessor( const edict_t *pEdict ) = 0;	
};