LTBOOL CAISenseSeeEnemyFootprint::Update(HOBJECT hStimulus, LTFLOAT fTimeDelta)
{
if ( !IsCharacter(hStimulus) ) return LTFALSE;
CCharacter* pChar = (CCharacter*)g_pLTServer->HandleToObject(hStimulus);
CTList<CharFootprintInfo*>* plistFootprints = pChar->GetFootprints();
CharFootprintInfo** ppFootprint = plistFootprints->GetItem(TLIT_FIRST);
while ( ppFootprint && *ppFootprint )
{
CharFootprintInfo* pFootprint = *ppFootprint;
if ( m_pAI->IsPositionVisibleFromEye(CAI::DefaultFilterFn, NULL, pFootprint->vPos, (m_fDistanceSqr), LTTRUE) )
{
React();
// Record the Timestamp
m_fTimestamp = pFootprint->fTimeStamp;
return LTTRUE;
}
ppFootprint = plistFootprints->GetItem(TLIT_NEXT);
}
return LTFALSE;
}
void CCharacterMgr::CallForBackupInList(BaseAI* pInTrouble, CTList<CBaseCharacter*> & list)
{
if (!g_pServerDE || !pInTrouble) return;
DVector vTroublePos, vHelperPos;
g_pServerDE->GetObjectPos(pInTrouble->m_hObject, &vTroublePos);
CBaseCharacter** pCur = DNULL;
BaseAI* pAI = DNULL;
pCur = list.GetItem(TLIT_FIRST);
while (pCur)
{
pAI = (BaseAI*)*pCur;
if (pAI && !pAI->IsDead())
{
g_pServerDE->GetObjectPos(pAI->m_hObject, &vHelperPos);
if (VEC_DIST(vTroublePos, vHelperPos) < 500.0f)
{
if (!pAI->m_hTarget)
{
pAI->SetNewTarget(pInTrouble->m_hLastDamager);
pAI->TargetObject(pInTrouble->m_hLastDamager);
}
}
}
pCur = list.GetItem(TLIT_NEXT);
}
}
HOBJECT CCharacterMgr::CanHearEnemyFireInList(BaseAI* pTargeter, CTList<CBaseCharacter*> & list)
{
CBaseCharacter** pCur = DNULL;
CBaseCharacter* pChar = DNULL;
pCur = list.GetItem(TLIT_FIRST);
HOBJECT hObj = DNULL;
while (pCur)
{
pChar = *pCur;
if (pChar && !pChar->IsDead())
{
hObj = pTargeter->CanAIHearWeaponFire(pChar);
if (hObj)
{
return hObj;
}
}
pCur = list.GetItem(TLIT_NEXT);
}
return DNULL;
}
void CAIMgr::UpdateAISensors()
{
CTList<CCharacter*>* plstChars = g_pCharacterMgr->GetCharacterList( CCharacterMgr::kList_AIs );
CCharacter** pNext;
CAI* pCurAI;
// No AI exist.
if( plstChars->GetLength() == 0 )
{
return;
}
// Find the next AI to update.
// AI update round robin, so everyone gets the opportunity to
// do a distributed update.
pNext = plstChars->GetItem( TLIT_FIRST );
while( m_hNextAI && ( (*pNext)->m_hObject != m_hNextAI ) )
{
pNext = plstChars->GetItem( TLIT_NEXT );
}
if( !pNext )
{
pNext = plstChars->GetItem( TLIT_FIRST );
}
HOBJECT hFirstToUpdate = (*pNext)->m_hObject;
// Iterate over all existing AI.
bool bWrapped = false;
bool bUpdateDistributedSensors = true;
while( true )
{
// Bail once we have updated everyone.
if( bWrapped )
{
break;
}
// Look ahead at the next AI to update, and flag if we've wrapped.
pCurAI = (CAI*)*pNext;
pNext = plstChars->GetItem( TLIT_NEXT );
if( !pNext )
{
pNext = plstChars->GetItem( TLIT_FIRST );
}
if( (*pNext)->m_hObject == hFirstToUpdate )
{
bWrapped = true;
}
// Do not update sensors of dead AI.
if( pCurAI->GetDestructible()->IsDead() )
{
continue;
}
// Update all AI's sensors.
// Stop updating distributed sensors once someone has performed
// an expensive update.
if( pCurAI->GetAISensorMgr()->UpdateSensors( bUpdateDistributedSensors ) )
{
#if DISTRIBUTE_SENSORS
m_hNextAI = (*pNext)->m_hObject;
bUpdateDistributedSensors = false;
#endif
}
}
}
void CAIMovement::AvoidDynamicObstacles(LTVector* pvNewPos, EnumAnimMovement eMovementType)
{
LTFLOAT fRadius = 128.f;
LTFLOAT fRadiusSqr = fRadius * fRadius;
LTVector vMyPos = m_pAI->GetPosition();
// Calculate the horizontal velocity.
LTVector vVel = *pvNewPos - vMyPos;
vVel.y = 0.f;
// Bail if no velocity.
if( ( vVel.x == 0.f ) && ( vVel.z == 0.f ) )
{
return;
}
LTFLOAT fMag = vVel.Mag();
LTVector vTotalForce(0.f, 0.f, 0.f);
LTVector vObstaclePos;
LTFLOAT fDistSqr;
LTFLOAT fForce;
LTVector vForce;
CTList<CCharacter*>* lstChars = LTNULL;
CCharacter** pCur = LTNULL;
// Iterate over all characters in the world.
int cCharLists = g_pCharacterMgr->GetNumCharacterLists();
for ( int iList = 0 ; iList < cCharLists ; ++iList )
{
lstChars = g_pCharacterMgr->GetCharacterList(iList);
pCur = lstChars->GetItem(TLIT_FIRST);
while( pCur )
{
CCharacter* pChar = (CCharacter*)*pCur;
pCur = lstChars->GetItem(TLIT_NEXT);
// Ignore myself.
if( pChar == m_pAI )
{
continue;
}
// Ignore characters that are too close to our dest.
// The pathfinding system requires AIs to reach waypoints.
g_pLTServer->GetObjectPos( pChar->m_hObject, &vObstaclePos );
if( vObstaclePos.DistSqr( m_vDest ) <= fRadiusSqr )
{
continue;
}
// Only characters within radius have forces that affect me.
fDistSqr = vObstaclePos.DistSqr( vMyPos );
if( fDistSqr >= fRadiusSqr )
{
continue;
}
// Calculate the force vector from the obstacle to myself.
fForce = fRadius - (LTFLOAT)sqrt( fDistSqr );
fForce /= fRadius;
fForce *= fForce;
fForce *= ( 2.f * fMag );
vForce = vMyPos - vObstaclePos;
vForce.y = 0.f;
vForce.Normalize();
vForce *= fForce;
// Accumulate the total force from all obstacles.
vTotalForce += vForce;
}
}
// Bail if no forces are affecting me.
if( ( vTotalForce.x == 0.f ) && ( vTotalForce.z == 0.f ) )
{
return;
}
// Calculate a new velocity vector.
LTVector vNewVel = vVel + vTotalForce;
// Constrain velocity so that is never deviates more than
// 90 degrees in either direction. This prevents AIs from ever
// reversing their direction when the forces are stronger than
// the initial velocity.
if( vNewVel.Dot( vVel ) < 0.f )
{
vVel.Normalize();
LTVector vUp( 0.f, 1.f, 0.f );
LTVector vRight = vUp.Cross( vVel );
if( vRight.Dot( vNewVel ) < 0.f )
{
vNewVel = -vRight;
}
else {
vNewVel = vRight;
}
}
// Keep magnitude of velocity constant.
vNewVel.Normalize();
vNewVel *= fMag;
// Calculate new position.
// Bail if new position is out of volumes.
// Bail if new position is in wrong volume.
LTVector vNewPos = vMyPos + vNewVel;
if( !m_pDestVolume->Inside2d( vNewPos, m_pAI->GetRadius() ) )
{
return;
}
// Move toward new position.
*pvNewPos = vNewPos;
if( eMovementType == kAM_Encode_GB )
{
m_pAI->FacePosMoving( m_pAI->GetPosition() );
}
else {
m_pAI->FacePosMoving( vNewPos );
}
}