Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

621 lines
19 KiB

//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: FIXME: This will ultimately become a more generic implementation
//
//=============================================================================
#include "cbase.h"
#include "ai_memory.h"
#include "ai_speech.h"
#include "ai_behavior.h"
#include "ai_navigator.h"
#include "ai_playerally.h"
#include "ai_behavior_follow.h"
#include "ai_moveprobe.h"
#include "ai_behavior_alyx_injured.h"
ConVar g_debug_injured_follow( "g_debug_injured_follow", "0" );
ConVar injured_help_plee_range( "injured_help_plee_range", "256" );
#define TLK_INJURED_FOLLOW_TOO_FAR "TLK_INJURED_FOLLOW_TOO_FAR"
BEGIN_DATADESC( CAI_BehaviorAlyxInjured )
DEFINE_FIELD( m_flNextWarnTime, FIELD_TIME ),
// m_ActivityMap
END_DATADESC();
Activity ACT_INJURED_COWER;
Activity ACT_GESTURE_INJURED_COWER_FLINCH;
#define COVER_DISTANCE 128.0f // Distance behind target to find cover
#define MIN_ENEMY_MOB 3 // Number of enemies considerd overwhelming
#define MAX_DIST_FROM_FOLLOW_TARGET 256 // If the follow target is farther than this, the NPC will run to it
//=============================================================================
CAI_BehaviorAlyxInjured::CAI_BehaviorAlyxInjured( void ) : m_flNextWarnTime( 0.0f )
{
SetDefLessFunc( m_ActivityMap );
}
struct ActivityMap_t
{
Activity activity;
Activity translation;
};
//-----------------------------------------------------------------------------
// Purpose:
//-----------------------------------------------------------------------------
void CAI_BehaviorAlyxInjured::PopulateActivityMap( void )
{
// Maps one activity to a translated one
ActivityMap_t map[] =
{
// Runs
{ ACT_RUN, ACT_RUN_HURT },
{ ACT_RUN_AIM, ACT_RUN_AIM }, // FIMXE: No appropriate temp anim right now!
{ ACT_RUN_CROUCH, ACT_RUN_HURT },
{ ACT_RUN_CROUCH_AIM, ACT_RUN_HURT },
{ ACT_RUN_PROTECTED, ACT_RUN_HURT },
{ ACT_RUN_RELAXED, ACT_RUN_HURT },
{ ACT_RUN_STIMULATED, ACT_RUN_HURT },
{ ACT_RUN_AGITATED, ACT_RUN_HURT },
{ ACT_RUN_AIM_RELAXED, ACT_RUN_AIM_RELAXED }, // FIMXE: No appropriate temp anim right now!
{ ACT_RUN_AIM_STIMULATED, ACT_RUN_AIM_STIMULATED }, // FIMXE: No appropriate temp anim right now!
{ ACT_RUN_AIM_AGITATED, ACT_RUN_AIM_AGITATED }, // FIMXE: No appropriate temp anim right now!
{ ACT_RUN_HURT, ACT_RUN_HURT },
// Walks
{ ACT_WALK, ACT_WALK_HURT },
{ ACT_WALK_AIM, ACT_WALK_HURT },
{ ACT_WALK_CROUCH, ACT_WALK_HURT },
{ ACT_WALK_CROUCH_AIM, ACT_WALK_HURT },
{ ACT_WALK_RELAXED, ACT_WALK_HURT },
{ ACT_WALK_STIMULATED, ACT_WALK_HURT },
{ ACT_WALK_AGITATED, ACT_WALK_HURT },
{ ACT_WALK_AIM_RELAXED, ACT_WALK_HURT },
{ ACT_WALK_AIM_STIMULATED, ACT_WALK_HURT },
{ ACT_WALK_AIM_AGITATED, ACT_WALK_HURT },
{ ACT_WALK_HURT, ACT_WALK_HURT },
{ ACT_IDLE, ACT_IDLE_HURT },
{ ACT_COVER_LOW, ACT_INJURED_COWER },
{ ACT_COWER, ACT_INJURED_COWER },
};
// Clear the map
m_ActivityMap.RemoveAll();
// Add all translations
for ( int i = 0; i < ARRAYSIZE( map ); i++ )
{
Assert( m_ActivityMap.Find( map[i].activity ) == m_ActivityMap.InvalidIndex() );
m_ActivityMap.Insert( map[i].activity, map[i].translation );
}
}
//-----------------------------------------------------------------------------
// Purpose: Populate the list after save/load
//-----------------------------------------------------------------------------
void CAI_BehaviorAlyxInjured::OnRestore( void )
{
PopulateActivityMap();
}
//-----------------------------------------------------------------------------
// Purpose: Populate the list on spawn
//-----------------------------------------------------------------------------
void CAI_BehaviorAlyxInjured::Spawn( void )
{
PopulateActivityMap();
}
//-----------------------------------------------------------------------------
// Purpose: Get the flinch activity for us to play
// Input : bHeavyDamage -
// bGesture -
// Output : Activity
//-----------------------------------------------------------------------------
Activity CAI_BehaviorAlyxInjured::GetFlinchActivity( bool bHeavyDamage, bool bGesture )
{
//
if ( ( bGesture == false ) || ( GetOuter()->GetActivity() != ACT_COWER ) )
return BaseClass::GetFlinchActivity( bHeavyDamage, bGesture );
// Translate the flinch if we're cowering
return ACT_GESTURE_INJURED_COWER_FLINCH;
}
//-----------------------------------------------------------------------------
// Purpose:
// Input : nActivity -
//-----------------------------------------------------------------------------
Activity CAI_BehaviorAlyxInjured::NPC_TranslateActivity( Activity nActivity )
{
// Find out what the base class wants to do with the activity
Activity nNewActivity = BaseClass::NPC_TranslateActivity( nActivity );
// Look it up in the translation map
int nIndex = m_ActivityMap.Find( nNewActivity );
if ( m_ActivityMap.IsValidIndex( nIndex ) )
return m_ActivityMap[nIndex];
return nNewActivity;
}
//-----------------------------------------------------------------------------
// Purpose: Determines if Alyx should run away from enemies or stay put
// Output : Returns true on success, false on failure.
//-----------------------------------------------------------------------------
bool CAI_BehaviorAlyxInjured::ShouldRunToCover( void )
{
Vector vecRetreatPos;
float flRetreatRadius = 128.0f;
// See how far off from our cover position we are
if ( FindCoverFromEnemyBehindTarget( GetFollowTarget(), flRetreatRadius, &vecRetreatPos ) )
{
float flDestDistSqr = ( GetOuter()->WorldSpaceCenter() - vecRetreatPos ).LengthSqr();
if ( flDestDistSqr > Square( flRetreatRadius ) )
return true;
}
return false;
}
//-----------------------------------------------------------------------------
// Purpose: See if we need to follow our goal
// Output : Returns true on success, false on failure.
//-----------------------------------------------------------------------------
bool CAI_BehaviorAlyxInjured::ShouldRunToFollowGoal( void )
{
// If we're too far from our follow target, we need to chase after them
float flDistToFollowGoalSqr = ( GetOuter()->GetAbsOrigin() - GetFollowTarget()->GetAbsOrigin() ).LengthSqr();
if ( flDistToFollowGoalSqr > Square(MAX_DIST_FROM_FOLLOW_TARGET) )
return true;
return false;
}
//-----------------------------------------------------------------------------
// Purpose: Translate base schedules into overridden forms
//-----------------------------------------------------------------------------
int CAI_BehaviorAlyxInjured::TranslateSchedule( int scheduleType )
{
switch( scheduleType )
{
case SCHED_RUN_FROM_ENEMY:
case SCHED_RUN_FROM_ENEMY_MOB:
{
// Get under cover if we're able to
if ( ShouldRunToCover() )
return SCHED_INJURED_RUN_FROM_ENEMY;
// Run to our follow goal if we're too far away from it
if ( ShouldRunToFollowGoal() )
return SCHED_FOLLOW;
// Cower if surrounded
if ( HasCondition( COND_INJURED_OVERWHELMED ) )
return SCHED_INJURED_COWER;
// Face our enemies
return SCHED_INJURED_FEAR_FACE;
}
break;
case SCHED_RUN_FROM_ENEMY_FALLBACK:
return SCHED_INJURED_COWER;
break;
}
return BaseClass::TranslateSchedule( scheduleType );
}
//-----------------------------------------------------------------------------
// Purpose: Pick up failure cases and handle them
//-----------------------------------------------------------------------------
int CAI_BehaviorAlyxInjured::SelectFailSchedule( int failedSchedule, int failedTask, AI_TaskFailureCode_t taskFailCode )
{
// Failed schedules
switch( failedSchedule )
{
case SCHED_RUN_FROM_ENEMY:
case SCHED_RUN_FROM_ENEMY_MOB:
case SCHED_FOLLOW:
return SCHED_INJURED_COWER;
}
// Failed tasks
switch( failedTask )
{
case TASK_FIND_COVER_FROM_ENEMY:
case TASK_FIND_INJURED_COVER_FROM_ENEMY:
// Only cower if we're already near enough to our follow target
float flDistToFollowTargetSqr = ( GetOuter()->GetAbsOrigin() - GetFollowTarget()->GetAbsOrigin() ).LengthSqr();
if ( flDistToFollowTargetSqr > Square( 256 ) )
return SCHED_FOLLOW;
return SCHED_INJURED_COWER;
break;
}
return BaseClass::SelectFailSchedule( failedSchedule, failedTask, taskFailCode );
}
//-----------------------------------------------------------------------------
// Purpose: Find the general direction enemies are coming towards us at
//-----------------------------------------------------------------------------
bool CAI_BehaviorAlyxInjured::FindThreatDirection2D( const Vector &vecSource, Vector *vecOut )
{
// Find the general direction our threat is coming from
bool bValid = false;
Vector vecScratch;
AIEnemiesIter_t iter;
// Iterate through all known enemies
for( AI_EnemyInfo_t *pMemory = GetOuter()->GetEnemies()->GetFirst(&iter); pMemory != NULL; pMemory = GetOuter()->GetEnemies()->GetNext(&iter) )
{
if ( pMemory == NULL || pMemory->hEnemy == NULL )
continue;
vecScratch = ( vecSource - pMemory->hEnemy->WorldSpaceCenter() );
VectorNormalize( vecScratch );
(*vecOut) += vecScratch;
bValid = true;
}
// Find the general direction
(*vecOut).z = 0.0f;
VectorNormalize( (*vecOut) );
return bValid;
}
//-----------------------------------------------------------------------------
// Purpose: Find a position that hides us from our threats while interposing the
// target entity between us and the threat
// Input : pTarget - entity to hide behind
// flRadius - Radius around the target to search
// *vecOut - position
//-----------------------------------------------------------------------------
bool CAI_BehaviorAlyxInjured::FindCoverFromEnemyBehindTarget( CBaseEntity *pTarget, float flRadius, Vector *vecOut )
{
if ( pTarget == NULL )
return false;
Vector vecTargetPos = pTarget->GetAbsOrigin();
Vector vecThreatDir = vec3_origin;
// Find our threat direction and base our cover on that
if ( FindThreatDirection2D( vecTargetPos, &vecThreatDir ) )
{
// Get a general location for taking cover
Vector vecTestPos = vecTargetPos + ( vecThreatDir * flRadius );
if ( g_debug_injured_follow.GetBool() )
{
NDebugOverlay::HorzArrow( GetOuter()->GetAbsOrigin(), vecTestPos, 8.0f, 255, 255, 0, 32, true, 2.0f );
}
// Make sure we never move towards our threat to get to cover!
Vector vecMoveDir = GetOuter()->GetAbsOrigin() - vecTestPos;
VectorNormalize( vecMoveDir );
float flDotToCover = DotProduct( vecMoveDir, vecThreatDir );
if ( flDotToCover > 0.0f )
{
if ( g_debug_injured_follow.GetBool() )
{
NDebugOverlay::HorzArrow( GetOuter()->GetAbsOrigin(), vecTestPos, 8.0f, 255, 0, 0, 32, true, 2.0f );
}
return false;
}
AIMoveTrace_t moveTrace;
GetOuter()->GetMoveProbe()->MoveLimit( NAV_GROUND,
GetOuter()->GetAbsOrigin(),
vecTestPos,
MASK_SOLID_BRUSHONLY,
NULL,
0,
&moveTrace );
bool bWithinRangeToGoal = ( moveTrace.vEndPosition - vecTestPos ).Length2DSqr() < Square( GetOuter()->GetHullWidth() * 3.0f );
bool bCanStandAtGoal = GetOuter()->GetMoveProbe()->CheckStandPosition( moveTrace.vEndPosition, MASK_SOLID_BRUSHONLY );
if ( bWithinRangeToGoal == false || bCanStandAtGoal == false )
{
if ( g_debug_injured_follow.GetBool() )
{
NDebugOverlay::SweptBox( GetOuter()->GetAbsOrigin(), vecTestPos, GetOuter()->GetHullMins(), GetOuter()->GetHullMaxs(), vec3_angle, 255, 0, 0, 0, 2.0f );
}
return false;
}
// Accept it
*vecOut = moveTrace.vEndPosition;
if ( g_debug_injured_follow.GetBool() )
{
NDebugOverlay::SweptBox( GetOuter()->GetAbsOrigin(), (*vecOut), GetOuter()->GetHullMins(), GetOuter()->GetHullMaxs(), vec3_angle, 0, 255, 0, 0, 2.0f );
}
return true;
}
return false;
}
//-----------------------------------------------------------------------------
// Purpose:
// Input : *pTask -
//-----------------------------------------------------------------------------
void CAI_BehaviorAlyxInjured::StartTask( const Task_t *pTask )
{
switch( pTask->iTask )
{
case TASK_FIND_COVER_FROM_ENEMY:
{
CBaseEntity *pLeader = GetFollowTarget();
if ( !pLeader )
{
BaseClass::StartTask( pTask );
break;
}
// Find a position behind our follow target
Vector coverPos = vec3_invalid;
if ( FindCoverFromEnemyBehindTarget( pLeader, COVER_DISTANCE, &coverPos ) )
{
AI_NavGoal_t goal( GOALTYPE_LOCATION, coverPos, ACT_RUN, AIN_HULL_TOLERANCE, AIN_DEF_FLAGS );
GetOuter()->GetNavigator()->SetGoal( goal );
GetOuter()->m_flMoveWaitFinished = gpGlobals->curtime + pTask->flTaskData;
TaskComplete();
return;
}
// Couldn't find anything
TaskFail( FAIL_NO_COVER );
break;
}
default:
BaseClass::StartTask( pTask );
break;
}
}
//-----------------------------------------------------------------------------
// Purpose: Whether or not Alyx is injured
//-----------------------------------------------------------------------------
bool CAI_BehaviorAlyxInjured::IsInjured( void ) const
{
return IsAlyxInInjuredMode();
}
//-----------------------------------------------------------------------------
// Purpose:
//-----------------------------------------------------------------------------
void CAI_BehaviorAlyxInjured::GatherConditions( void )
{
BaseClass::GatherConditions();
// Always stomp over this
ClearCondition( COND_INJURED_TOO_FAR_FROM_PLAYER );
ClearCondition( COND_INJURED_OVERWHELMED );
// See if we're overwhelmed by foes
if ( NumKnownEnemiesInRadius( GetOuter()->GetAbsOrigin(), COVER_DISTANCE ) >= MIN_ENEMY_MOB )
{
SetCondition( COND_INJURED_OVERWHELMED );
}
// Determines whether we consider ourselves in danger
bool bInDanger = ( HasCondition( COND_LIGHT_DAMAGE ) ||
HasCondition( COND_HEAVY_DAMAGE ) ||
HasCondition( COND_INJURED_OVERWHELMED ) );
// See if we're too far away from the player and in danger
if ( AI_IsSinglePlayer() && bInDanger )
{
bool bWarnPlayer = false;
// This only works in single-player
CBasePlayer *pPlayer = UTIL_PlayerByIndex( 1 );
if ( pPlayer != NULL )
{
// FIXME: This distance may need to be the length of the shortest walked path between the follower and the target
// Get our approximate distance to the player
float flDistToPlayer = UTIL_DistApprox2D( GetOuter()->GetAbsOrigin(), pPlayer->GetAbsOrigin() );
if ( flDistToPlayer > injured_help_plee_range.GetFloat() )
{
bWarnPlayer = true;
}
else if ( flDistToPlayer > (injured_help_plee_range.GetFloat()*0.5f) && HasCondition( COND_SEE_PLAYER ) == false )
{
// Cut our distance in half if we can't see the player
bWarnPlayer = true;
}
}
// Yell for help!
if ( bWarnPlayer )
{
// FIXME: This should be routed through the normal speaking code with a system to emit from the player's suit.
CBasePlayer *pPlayer = UTIL_PlayerByIndex( 1 );
//float flPlayerDistSqr = ( GetOuter()->GetAbsOrigin() - pPlayer->GetAbsOrigin() ).LengthSqr();
// If the player is too far away or we can't see him
//if ( HasCondition( COND_SEE_PLAYER ) == false || flPlayerDistSqr > Square( 128 ) )
{
if ( m_flNextWarnTime < gpGlobals->curtime )
{
pPlayer->EmitSound( "npc_alyx.injured_too_far" );
m_flNextWarnTime = gpGlobals->curtime + random->RandomFloat( 3.0f, 5.0f );
}
}
/*
else
{
SpeakIfAllowed( TLK_INJURED_FOLLOW_TOO_FAR );
m_flNextWarnTime = gpGlobals->curtime + random->RandomFloat( 3.0f, 5.0f );
}
*/
SetCondition( COND_INJURED_TOO_FAR_FROM_PLAYER );
}
}
}
//-----------------------------------------------------------------------------
// Purpose: Speak a concept if we're able to
//-----------------------------------------------------------------------------
void CAI_BehaviorAlyxInjured::SpeakIfAllowed( AIConcept_t concept )
{
CAI_Expresser *pExpresser = GetOuter()->GetExpresser();
if ( pExpresser == NULL )
return;
// Must be able to speak the concept
if ( pExpresser->CanSpeakConcept( concept ) )
{
pExpresser->Speak( concept );
}
}
//-----------------------------------------------------------------------------
// Purpose: Get the number of known enemies within a radius to a point
//-----------------------------------------------------------------------------
int CAI_BehaviorAlyxInjured::NumKnownEnemiesInRadius( const Vector &vecSource, float flRadius )
{
int nNumEnemies = 0;
float flRadiusSqr = Square( flRadius );
AIEnemiesIter_t iter;
// Iterate through all known enemies
for( AI_EnemyInfo_t *pMemory = GetEnemies()->GetFirst(&iter); pMemory != NULL; pMemory = GetEnemies()->GetNext(&iter) )
{
if ( pMemory == NULL || pMemory->hEnemy == NULL )
continue;
// Must hate or fear them
if ( GetOuter()->IRelationType( pMemory->hEnemy ) != D_HT && GetOuter()->IRelationType( pMemory->hEnemy ) != D_FR )
continue;
// Count only the enemies I've seen recently
if ( gpGlobals->curtime - pMemory->timeLastSeen > 0.5f )
continue;
// Must be within the radius we've specified
float flEnemyDistSqr = ( vecSource - pMemory->hEnemy->GetAbsOrigin() ).Length2DSqr();
if ( flEnemyDistSqr < flRadiusSqr )
{
nNumEnemies++;
}
}
return nNumEnemies;
}
// ----------------------------------------------
// Custom AI declarations
// ----------------------------------------------
AI_BEGIN_CUSTOM_SCHEDULE_PROVIDER( CAI_BehaviorAlyxInjured )
{
DECLARE_ACTIVITY( ACT_GESTURE_INJURED_COWER_FLINCH )
DECLARE_ACTIVITY( ACT_INJURED_COWER )
DECLARE_CONDITION( COND_INJURED_TOO_FAR_FROM_PLAYER )
DECLARE_CONDITION( COND_INJURED_OVERWHELMED )
DECLARE_TASK( TASK_FIND_INJURED_COVER_FROM_ENEMY )
DEFINE_SCHEDULE
(
SCHED_INJURED_COWER,
" Tasks"
// TOOD: Announce cower
" TASK_PLAY_SEQUENCE ACTIVITY:ACT_COWER"
" TASK_WAIT 2"
""
" Interrupts"
" COND_GIVE_WAY"
" COND_PLAYER_PUSHING"
)
DEFINE_SCHEDULE
(
SCHED_INJURED_FEAR_FACE,
" Tasks"
" TASK_STOP_MOVING 0"
" TASK_SET_ACTIVITY ACTIVITY:ACT_IDLE" // FIXME: Scared idle?
" TASK_FACE_ENEMY 0"
""
" Interrupts"
" COND_GIVE_WAY"
" COND_PLAYER_PUSHING"
);
DEFINE_SCHEDULE
(
SCHED_INJURED_RUN_FROM_ENEMY,
" Tasks"
" TASK_SET_FAIL_SCHEDULE SCHEDULE:SCHED_INJURED_COWER"
" TASK_STOP_MOVING 0"
" TASK_FIND_COVER_FROM_ENEMY 0"
" TASK_RUN_PATH 0"
" TASK_WAIT_FOR_MOVEMENT 0"
""
" Interrupts"
);
AI_END_CUSTOM_SCHEDULE_PROVIDER()
}
//-----------------------------------------------------------------------------
// CAI_InjuredFollowGoal
//-----------------------------------------------------------------------------
BEGIN_DATADESC( CAI_InjuredFollowGoal )
END_DATADESC()
LINK_ENTITY_TO_CLASS( ai_goal_injured_follow, CAI_InjuredFollowGoal );
//-------------------------------------
void CAI_InjuredFollowGoal::EnableGoal( CAI_BaseNPC *pAI )
{
CAI_BehaviorAlyxInjured *pBehavior;
if ( !pAI->GetBehavior( &pBehavior ) )
return;
if ( GetGoalEntity() == NULL )
return;
pBehavior->SetFollowGoal( this );
}
//-------------------------------------
void CAI_InjuredFollowGoal::DisableGoal( CAI_BaseNPC *pAI )
{
CAI_BehaviorAlyxInjured *pBehavior;
if ( !pAI->GetBehavior( &pBehavior ) )
return;
pBehavior->ClearFollowGoal( this );
}