Crash when using capsule in SweepSingleByChannel

Development World Creation
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1

Hello I am using UE 4.15.2. I have a first person C++ template project with an added Tick event. The code below is used in the tick event. When using a single line trace or a sphere in SweepSingleByChannel, it works correctly (code below)

FHitResult HitResult2(ForceInit);
FCollisionQueryParams TraceParams(FName(TEXT("DashTrace")), true, this);
TraceParams.bTraceComplex = true;
GetWorld()->DebugDrawTraceTag = FName(TEXT("DashTrace"));
if (GetWorld()->SweepSingleByChannel(HitResult2, GetActorLocation(), GetActorLocation()+GetActorForwardVector()*100.0f, FQuat(), ECollisionChannel::ECC_Visibility, FCollisionShape::MakeSphere(55.0f), TraceParams))
{
	GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red, TEXT("TRACE HIT"));
}

However, if the shape is made a capsule instead, the editor will crash when you attempt to play the game.

FHitResult HitResult2(ForceInit);
FCollisionQueryParams TraceParams(FName(TEXT("DashTrace")), true, this);
TraceParams.bTraceComplex = true;
GetWorld()->DebugDrawTraceTag = FName(TEXT("DashTrace"));
if (GetWorld()->SweepSingleByChannel(HitResult2, GetActorLocation(), GetActorLocation()+GetActorForwardVector()*100.0f, FQuat(), ECollisionChannel::ECC_Visibility, FCollisionShape::MakeCapsule(55.0f, 96.0f), TraceParams))
{
	GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red, TEXT("TRACE HIT"));
}

I cannot figure out if this is an engine bug or what. Any ideas? I would like to do a capsule trace…

2

hi,
if you have a player and want to have a capsule that fits him try this:

FCollisionQueryParams TraceParams;
TraceParams.bTraceComplex = true;
//Ignore Actors
TraceParams.AddIgnoredActor(this);
TraceParams.AddIgnoredActor(player);
//Re-initialize hit info
FHitResult HitOut = FHitResult(ForceInit);
FCollisionShape collisionShape = player->GetCapsuleComponent()->GetCollisionShape();
FQuat quatTest = FQuat::Identity;	
if (GetWorld()->SweepSingleByChannel(hitOut, start, end, quatTest, ECollisionChannel::ECC_Visibility, collisionShape, TraceParams))
{
	// it hitt
}
else
{
	// it didn't hit
{

I hope this helps you : )