Why does SweepSingleByChannel not work with a Box?

Development World Creation
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1

FCollisionShape StructureCollision = StructureMesh->GetCollisionShape();

FHitResult Hit; 
    
FVector CollisionLocation;
CollisionLocation = GetActorLocation();
CollisionLocation.Z += StructureCollision.GetBox().Z;
    
bool bHasHit = GetWorld()->SweepSingleByChannel(Hit, CollisionLocation, CollisionLocation, FQuat::Identity, ECollisionChannel::ECC_GameTraceChannel2, StructureCollision); //<--
    
DrawDebugBox(GetWorld(), CollisionLocation, StructureCollision.GetExtent(), (bHasHit ? FColor::Green : FColor::Red), true, 5.f);

What I am expecting: When StructureMesh (Static Mesh) is overlapping with another actor in the scene that respons to the appropriate channel (and this code is called) the debug box should be green.

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What happens instead: The debug box does not turn green and therefore no hit results are generated.
But replacing

bool bHasHit = GetWorld()->SweepSingleByChannel(Hit, CollisionLocation, CollisionLocation, FQuat::Identity, ECollisionChannel::ECC_GameTraceChannel2, StructureCollision);

with

bool bHasHit = GetWorld()->SweepSingleByChannel(Hit, CollisionLocation, CollisionLocation, FQuat::Identity, ECollisionChannel::ECC_GameTraceChannel2, FCollisionShape::MakeSphere(300.f));

does lead to the debug color turning green.

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Note: Using FCollisionShape::MakeBox(300.f, 300.f, 300.f) doesn’t work either.

How can I fix this?

2

I think box collision is working now (4.17), I have made some testing with foliage collision and it seems to be working.

3

I have used blueprint as a workaround for this. In 4.17. I haven’t encountered it so far.

4

start and end location need to be different. add a small increment (0.001f) to the Z-axis on the start location, and then set that as the end. good luck

5

It actually worked for me

6

You are my savior. I have been trying to figure out for weeks, why sweep with box would not work.