//-----------------------------------------------------------------------------
// Purpose: Check the weapon LOS for an owner at an arbitrary position
// If bSetConditions is true, LOS related conditions will also be set
//-----------------------------------------------------------------------------
bool CBaseCombatWeapon::WeaponLOSCondition( const Vector &ownerPos, const Vector &targetPos, bool bSetConditions )
{
// --------------------
// Check for occlusion
// --------------------
CAI_BaseNPC* npcOwner = m_hOwner.Get()->MyNPCPointer();
// Find its relative shoot position
Vector vecRelativeShootPosition;
VectorSubtract( npcOwner->Weapon_ShootPosition(), npcOwner->GetAbsOrigin(), vecRelativeShootPosition );
Vector barrelPos = ownerPos + vecRelativeShootPosition;
// Use the custom LOS trace filter
CWeaponLOSFilter traceFilter( m_hOwner.Get(), npcOwner->GetEnemy(), COLLISION_GROUP_BREAKABLE_GLASS );
trace_t tr;
UTIL_TraceLine( barrelPos, targetPos, MASK_SHOT, &traceFilter, &tr );
// See if we completed the trace without interruption
if ( tr.fraction == 1.0 )
{
if ( ai_debug_shoot_positions.GetBool() )
{
NDebugOverlay::Line( barrelPos, targetPos, 0, 255, 0, false, 1.0 );
}
return true;
}
CBaseEntity *pHitEnt = tr.m_pEnt;
CBasePlayer *pEnemyPlayer = ToBasePlayer( npcOwner->GetEnemy() );
// is player in a vehicle? if so, verify vehicle is target and return if so (so npc shoots at vehicle)
if ( pEnemyPlayer && pEnemyPlayer->IsInAVehicle() )
{
// Ok, player in vehicle, check if vehicle is target we're looking at, fire if it is
// Also, check to see if the owner of the entity is the vehicle, in which case it's valid too.
// This catches vehicles that use bone followers.
CBaseEntity *pVehicle = pEnemyPlayer->GetVehicle()->GetVehicleEnt();
if ( pHitEnt == pVehicle || pHitEnt->GetOwnerEntity() == pVehicle )
return true;
}
// Hitting our enemy is a success case
if ( pHitEnt == npcOwner->GetEnemy() )
{
if ( ai_debug_shoot_positions.GetBool() )
{
NDebugOverlay::Line( barrelPos, targetPos, 0, 255, 0, false, 1.0 );
}
return true;
}
// If a vehicle is blocking the view, grab its driver and use that as the combat character
CBaseCombatCharacter *pBCC;
IServerVehicle *pVehicle = pHitEnt->GetServerVehicle();
if ( pVehicle )
{
pBCC = pVehicle->GetPassenger( );
}
else
{
pBCC = ToBaseCombatCharacter( pHitEnt );
}
if ( pBCC )
{
if ( npcOwner->IRelationType( pBCC ) == D_HT )
return true;
if ( bSetConditions )
{
npcOwner->SetCondition( COND_WEAPON_BLOCKED_BY_FRIEND );
}
}
else if ( bSetConditions )
{
npcOwner->SetCondition( COND_WEAPON_SIGHT_OCCLUDED );
npcOwner->SetEnemyOccluder( pHitEnt );
if( ai_debug_shoot_positions.GetBool() )
{
NDebugOverlay::Line( tr.startpos, tr.endpos, 255, 0, 0, false, 1.0 );
}
}
return false;
}
