HL SDK 2.3
In this version of the Half-Life engine and SDK, we have added the ability for players to speak to each other while playing on a server. MOD authors have full control over which players are allowed to speak to each other.
There are two new functions in enginefuncs_s you can use to find out which players are allowed to talk to each other and to change who can talk to each other.
qboolean (*pfnVoice_GetClientListening)(int iReceiver, int iSender);
Use pfnVoice_GetClientListening to ask the engine if a certain player is currently allowed to hear another player’s speech.
qboolean (*pfnVoice_SetClientListening)(int iReceiver, int iSender, qboolean bListen);
Use pfnVoice_SetClientListening to tell the engine if a certain player is allowed to hear another player’s speech.
These two functions are all that the engine exposes to the MOD to control voice. Most of the code involved in adding voice to a MOD is in the form of HUD elements and such. A good way to add voice to your mod and have its functionality appear familiar to players is to use the code we have for Half-Life Deathmatch in the SDK. We describe the UI code below.
On the client, there is a new function a MOD can implement that takes this form:
void DLLEXPORT HUD_VoiceStatus(int entindex, qboolean bTalking)
The engine calls this when it detects that players in the game have started or stopped talking. Entity indices are usually passed into this function, but there are two special entity indices that are passed in.
SDK MOD Code
This section describes the SDK code that is available to MOD authors to use as a starting point for adding voice to their MOD.
In the MOD game DLL, we have a manager class called CVoiceGameMgr in the game_shared/voice_gamemgr.h file which:
To use CVoiceGameMgr, derive a class from IVoiceGameMgrHelper and implement the CanPlayerHearPlayer function so CVoiceGameMgr can ask your MOD which players are allowed to hear each other. Then call its Update, ClientConnected, and ClientCommand functions from your CGameRules class in the corresponding callbacks (Update corresponds to Think).
Most of the game code that we have added to the SDK deals with presentation of UI elements for players to control who they want to hear. The core of this code is in the CVoiceStatus class in the game_shared/voice_status.h file. CVoiceStatus manages a list of who is currently speaking in the game and displays icons for the speakers on the screen. It also manages, saves, and loads a list of which players the local player has banned from hearing. This allows people to completely turn off players that abuse the voice functionality.
Use GetClientVoiceMgr() to get a pointer to a global instance of this class. Then call its member functions from the appropriate places in the rest of your client DLL code. You can find all the places CVoiceStatus is called from other code by doing a Find In Files through the client DLL files and searching for “GetClientVoiceMgr”.
CVoiceStatus makes use of several resources for the HUD display if they exist:
Console Variables and Commands of Interest
Server Console Variables/Commands
Client Console Variables/Commands
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