Concept
Concept is high level state that the code is trying to convey, such as say hello(TLK_HELLO), answer some question(TLK_ANSWER), or call for help(TLK_HELP_ME), etc.
You can command a NPC to speak based on a concept by using Speak( AIConcept_t concept, const char *modifiers /*= NULL*/ ) method. This is defined in AI_Speech.cpp.
bool CAI_Expresser::Speak( AIConcept_t concept, const char *modifiers /*= NULL*/ )
{
AI_Response *result = SpeakFindResponse( concept, modifiers );
if ( !result )
{
return false;
}
SpeechMsg( GetOuter(), "%s (%x) spoke %s (%f)\n", STRING(GetOuter()->GetEntityName()), GetOuter(), concept, gpGlobals->curtime );
bool spoke = SpeakDispatchResponse( concept, result );
return spoke;
}
It trys to find a response for the concept from Response System scripts. Then if it finds one, trys to dispatch it.
NPC_talker.cpp is a good example integrating concept speaks within tasks and schedules. If you want to make a custom NPC that talks, this would be the best place to start.
You can also make a NPC choose a response via "DispatchResponse" entity input.
Concept List
ai_behavior_lead.h
ai_behavior_lead.h
TLK_LEAD_START
TLK_LEAD_ARRIVAL
TLK_LEAD_SUCCESS
lead_fail
TLK_LEAD_COMINGBACK
TLK_LEAD_CATCHUP
TLK_LEAD_RETRIEVE
TLK_LEAD_ATTRACTPLAYER
TLK_LEAD_WAITOVER
TLK_LEAD_MISSING_WEAPON
ai_playerally.h
TLK_ANSWER
TLK_QUESTION
TLK_IDLE
TLK_STARE
TLK_USE
TLK_STARTFOLLOW
TLK_STOPFOLLOW
TLK_JOINPLAYER
TLK_STOP
TLK_NOSHOOT
TLK_HELLO
TLK_PHELLO
TLK_PIDLE
TLK_PQUESTION
TLK_PLHURT1
TLK_PLHURT2
TLK_PLHURT3
TLK_PLPUSH
TLK_PLRELOAD
TLK_SMELL
TLK_SHOT
TLK_WOUND
TLK_MORTAL
TLK_DANGER
TLK_SEE_COMBINE
TLK_ENEMY_DEAD
TLK_SELECTED // selected by player in command mode.
TLK_COMMANDED // received orders from player in command mode
TLK_COMMAND_FAILED
TLK_BETRAYED // player killed an ally in front of me.
TLK_ALLY_KILLED // witnessed an ally die some other way.
TLK_ATTACKING // about to fire my weapon at a target
TLK_HEAL // healing someone
TLK_GIVEAMMO // giving ammo to someone
TLK_DEATH // Death rattle
TLK_HELP_ME // call out to the player for help
TLK_PLYR_PHYSATK // Player's attacked me with a thrown physics object
TLK_ANSWER_VORT
TLK_ANSWER_CIT
TLK_QUESTION_VORT
TLK_QUESTION_CIT
TLK_NEWWEAPON
TLK_PLDEAD
TLK_HIDEANDRELOAD
TLK_STARTCOMBAT
TLK_WATCHOUT
TLK_RESUME // resume is as I was saying... or anyhow...
TLK_TGSTAYPUT// tourguide stuff
TLK_TGFIND
TLK_TGSEEK
TLK_TGLOSTYOU
TLK_TGCATCHUP
TLK_TGENDTOUR