void ASWeaponInstant::SimulateInstantHit(const FVector& Origin)
{
const FVector StartTrace = Origin;
const FVector AimDir = GetAdjustedAim();
const FVector EndTrace = StartTrace + (AimDir * WeaponRange);
const FHitResult Impact = WeaponTrace(StartTrace, EndTrace);
if (Impact.bBlockingHit)
{
SpawnImpactEffects(Impact);
SpawnTrailEffects(Impact.ImpactPoint);
}
else
{
SpawnTrailEffects(EndTrace);
}
// Do not spawn near-hit if we actually hit a pawn
if (Impact.GetActor() && Impact.GetActor()->IsA(ASCharacter::StaticClass()))
{
return;
}
for (FConstPawnIterator It = GetWorld()->GetPawnIterator(); It; It++)
{
// Find a locally controlled pawn that is not the instigator of the hit.
ASCharacter* OtherPawn = Cast<ASCharacter>(*It);
if (OtherPawn && OtherPawn != GetPawnOwner() && OtherPawn->IsLocallyControlled())
{
// Calculate shortest distance to point. (using the estimated eye height)
const float DistanceToPawn = FVector::CrossProduct(AimDir, OtherPawn->GetActorLocation() - Origin).Size();
/* Owner can be lost before client gets to simulate the hit. */
ASCharacter* P = GetPawnOwner();
if (P)
{
FVector LookAt = (OtherPawn->GetActorLocation() - GetPawnOwner()->GetActorLocation());
LookAt.Normalize();
float LookDot = FVector::DotProduct(AimDir, LookAt);
if (DistanceToPawn < NearHitMaxDistance && LookDot > 0)
{
// TODO: Play at nearest "almost" hit location.
const FVector SoundLocation = Origin + (AimDir * DistanceToPawn);
// Volume is based on distance to missed shot
float Volume = FMath::Clamp(1 - (DistanceToPawn / NearHitMaxDistance), 0.1f, 1.0f);
UGameplayStatics::PlaySoundAtLocation(this, NearHitSound, /*SoundLocation*/ OtherPawn->GetActorLocation(), Volume);
}
}
}
}
}
void ASWeaponInstant::SpawnTrailEffects(const FVector& EndPoint)
{
// Keep local count for effects
BulletsShotCount++;
const FVector Origin = GetMuzzleLocation();
FVector ShootDir = EndPoint - Origin;
// Only spawn if a minimum distance is satisfied.
if (ShootDir.Size() < MinimumProjectileSpawnDistance)
{
return;
}
if (BulletsShotCount % TracerRoundInterval == 0)
{
if (TracerFX)
{
ShootDir.Normalize();
UGameplayStatics::SpawnEmitterAtLocation(this, TracerFX, Origin, ShootDir.Rotation());
}
}
else
{
// Only create trails FX by other players.
ASCharacter* OwningPawn = GetPawnOwner();
if (OwningPawn && OwningPawn->IsLocallyControlled())
{
return;
}
if (TrailFX)
{
UParticleSystemComponent* TrailPSC = UGameplayStatics::SpawnEmitterAtLocation(this, TrailFX, Origin);
if (TrailPSC)
{
TrailPSC->SetVectorParameter(TrailTargetParam, EndPoint);
}
}
}
}
