Sphere Trace For Objects in C++

Development Programming & Scripting C++
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11

There is no need to import the kismet library, just invoke what it does. and use SweepMultiByObjectType. It’s pretty nice to dive through these methods and learn how these things work. Sometimes it is worth it or necessary to just import a thing from kismet, I don’t think that is the case here.

     TArray<FHitResult> HitResults;

FVector Start = GetActorLocation();  // Center of the sphere
FVector End = Start;                 // No movement, just a sphere test
float Radius = 500.f;                // Your sphere radius

FCollisionObjectQueryParams ObjectQueryParams;
ObjectQueryParams.AddObjectTypesToQuery(ECC_Pawn); // Example: looking for Pawns, add more as needed
ObjectQueryParams.AddObjectTypesToQuery(ECC_WorldDynamic);

FCollisionShape CollisionShape = FCollisionShape::MakeSphere(Radius);

bool bHit = GetWorld()->SweepMultiByObjectType(
    HitResults,
    Start,
    End,
    FQuat::Identity,
    ObjectQueryParams,
    CollisionShape
);

if (bHit)
{
    for (const FHitResult& Hit : HitResults)
    {
        AActor* HitActor = Hit.GetActor();
        if (HitActor)
        {
            UE_LOG(LogTemp, Warning, TEXT("Hit Actor: %s"), *HitActor->GetName());
        }
    }
}