{

public:

// Input system overrides TBD

// Something like this

//virtual void AddMessageHandler( int wm_message, bool (*pfnCallback)( int wm_message, int wParam, int lParam ) ) = 0;

//virtual void RemoveMessageHanlder( int wm_message, bool (*pfnCallbackToRemove)( int wm_message, int wParam, int lParam ) ) = 0;

// Helpers for implementing a tool switching UI

virtual int GetToolCount() const = 0;

virtual char const *GetToolName( int index ) const = 0;

virtual void SwitchToTool( int index ) = 0;

virtual bool IsTopmostTool( const IToolSystem *sys ) const = 0;

virtual const IToolSystem *GetToolSystem( int index ) const = 0;

virtual IToolSystem *GetTopmostTool() = 0;

// Take over input

virtual void ShowCursor( bool show ) = 0;

virtual bool IsCursorVisible() const = 0;

{

public:

virtual void GetServerFactory( CreateInterfaceFn& factory ) = 0;

virtual void GetClientFactory( CreateInterfaceFn& factory ) = 0;

virtual float GetSoundDuration( const char *pszName ) = 0;

virtual bool IsSoundStillPlaying( int guid ) = 0;

// Returns the guid of the sound

virtual int StartSound(

int iUserData,

bool staticsound,

int iEntIndex,

int iChannel,

const char *pSample,

float flVolume,

soundlevel_t iSoundlevel,

const Vector& origin,

const Vector& direction,

int iFlags = 0,

int iPitch = PITCH_NORM,

bool bUpdatePositions = true,

float delay = 0.0f,

int speakerentity = -1 ) = 0;

virtual void StopSoundByGuid( int guid ) = 0;

// Returns how long the sound is

virtual float GetSoundDuration( int guid ) = 0;

// Returns if the sound is looping

virtual bool IsLoopingSound( int guid ) = 0;

virtual void ReloadSound( const char *pSample ) = 0;

virtual void StopAllSounds( ) = 0;

virtual float GetMono16Samples( const char *pszName, CUtlVector< short >& sampleList ) = 0;

virtual void SetAudioState( const AudioState_t &audioState ) = 0;

// Issue a console command

virtual void Command( char const *cmd ) = 0;

// Flush console command buffer right away

virtual void Execute() = 0;

virtual char const *GetCurrentMap() = 0;

virtual void ChangeToMap( char const *mapname ) = 0;

virtual bool IsMapValid( char const *mapname ) = 0;

// Method for causing engine to call client to render scene with no view model or overlays

// See cdll_int.h for enum RenderViewInfo_t for specifying whatToRender

virtual void RenderView( CViewSetup &view, int nFlags, int whatToRender ) = 0;

// Returns true if the player is fully connected and active in game (i.e, not still loading)

virtual bool IsInGame() = 0;

// Returns true if the player is connected, but not necessarily active in game (could still be loading)

virtual bool IsConnected() = 0;

virtual int GetMaxClients() = 0; // Tools might want to ensure single player, e.g.

virtual bool IsGamePaused() = 0;

virtual void SetGamePaused( bool paused ) = 0;

virtual float GetTimescale() = 0; // Could do this via ConVar system, too

virtual void SetTimescale( float scale ) = 0;

// Real time is unscaled, but is updated once per frame

virtual float GetRealTime() = 0;

virtual float GetRealFrameTime() = 0; // unscaled

// Get high precision timer (for profiling?)

virtual float Time() = 0;

// Host time is scaled

virtual float HostFrameTime() = 0; // host_frametime

virtual float HostTime() = 0; // host_time

virtual int HostTick() = 0; // host_tickcount

virtual int HostFrameCount() = 0; // total famecount

virtual float ServerTime() = 0; // gpGlobals->curtime on server

virtual float ServerFrameTime() = 0; // gpGlobals->frametime on server

virtual int ServerTick() = 0; // gpGlobals->tickcount on server

virtual float ServerTickInterval() = 0; // tick interval on server

virtual float ClientTime() = 0; // gpGlobals->curtime on client

virtual float ClientFrameTime() = 0; // gpGlobals->frametime on client

virtual int ClientTick() = 0; // gpGlobals->tickcount on client

virtual void SetClientFrameTime( float frametime ) = 0; // gpGlobals->frametime on client

// Currently the engine doesn't like to do networking when it's paused, but if a tool changes entity state, it can be useful to force

// a network update to get that state over to the client

virtual void ForceUpdateDuringPause() = 0;

// Maybe through modelcache???

virtual model_t *GetModel( HTOOLHANDLE hEntity ) = 0;

// Get the .mdl file used by entity (if it's a cbaseanimating)

virtual studiohdr_t *GetStudioModel( HTOOLHANDLE hEntity ) = 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, PRINTF_FORMAT_STRING 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, PRINTF_FORMAT_STRING const char *fmt, ... ) = 0;

// Get the current game directory (hl2, tf2, hl1, cstrike, etc.)

virtual void GetGameDir( char *szGetGameDir, int maxlength ) = 0;

// Do we need separate rects for the 3d "viewport" vs. the tools surface??? and can we control viewports from

virtual void GetScreenSize( int& width, int &height ) = 0;

// GetRootPanel(VPANEL)

// Sets the location of the main view

virtual void SetMainView( const Vector &vecOrigin, const QAngle &angles ) = 0;

// Gets the player view

virtual bool GetPlayerView( CViewSetup &playerView, int x, int y, int w, int h ) = 0;

// From a location on the screen, figure out the vector into the world

virtual void CreatePickingRay( const CViewSetup &viewSetup, int x, int y, Vector& org, Vector& forward ) = 0;

// precache methods

virtual bool PrecacheSound( const char *pName, bool bPreload = false ) = 0;

virtual bool PrecacheModel( const char *pName, bool bPreload = false ) = 0;

virtual void InstallQuitHandler( void *pvUserData, FnQuitHandler func ) = 0;

virtual void TakeTGAScreenShot( char const *filename, int width, int height ) = 0;

// Even if game is paused, force networking to update to get new server state down to client

virtual void ForceSend() = 0;

virtual bool IsRecordingMovie() = 0;

// NOTE: Params can contain file name, frame rate, output avi, output raw, and duration

virtual void StartMovieRecording( KeyValues *pMovieParams ) = 0;

virtual void EndMovieRecording() = 0;

virtual void CancelMovieRecording() = 0;

virtual IVideoRecorder *GetActiveVideoRecorder() = 0;

virtual void StartRecordingVoiceToFile( char const *filename, char const *pPathID = 0 ) = 0;

virtual void StopRecordingVoiceToFile() = 0;

virtual bool IsVoiceRecording() = 0;

// A version that simply accepts a ray (can work as a traceline or tracehull)

virtual void TraceRay( const Ray_t &ray, unsigned int fMask, ITraceFilter *pTraceFilter, CBaseTrace *pTrace ) = 0; // client version

virtual void TraceRayServer( const Ray_t &ray, unsigned int fMask, ITraceFilter *pTraceFilter, CBaseTrace *pTrace ) = 0;

virtual bool IsConsoleVisible() = 0;

virtual int GetPointContents( const Vector &vecPosition ) = 0;

virtual int GetActiveDLights( dlight_t *pList[MAX_DLIGHTS] ) = 0;

virtual int GetLightingConditions( const Vector &vecPosition, Vector *pColors, int nMaxLocalLights, LightDesc_t *pLocalLights ) = 0;

virtual void GetWorldToScreenMatrixForView( const CViewSetup &view, VMatrix *pVMatrix ) = 0;

// Collision support

virtual SpatialPartitionHandle_t CreatePartitionHandle( IHandleEntity *pEntity,

SpatialPartitionListMask_t listMask, const Vector& mins, const Vector& maxs ) = 0;

virtual void DestroyPartitionHandle( SpatialPartitionHandle_t hPartition ) = 0;

virtual void InstallPartitionQueryCallback( IPartitionQueryCallback *pQuery ) = 0;

virtual void RemovePartitionQueryCallback( IPartitionQueryCallback *pQuery ) = 0;

virtual void ElementMoved( SpatialPartitionHandle_t handle,

const Vector& mins, const Vector& maxs ) = 0;