AEyeXActorBase* AEyeXPlayerController::FindBySweep(FHitResult& OutHit, const FSceneView* const View, const FVector2D& GazePoint,
const FCollisionQueryParams& TraceParams, const FCollisionObjectQueryParams& ObjectParams)
{
if (SweepIntervals <= 1)
{
UE_LOG(LogEyeX, Warning, TEXT("Invalid value for SweepIntervals: %i. Must be greater than 0."), SweepIntervals);
return nullptr;
}
UWorld* World = GetWorld();
if (!World) return nullptr;
FVector Start, Direction;
View->DeprojectFVector2D(GazePoint, Start, Direction);
const float TanFOVScaled = GetTanOfFOVAngleScaled();
// Perform sweeps
const float DeltaDistance = MaxDistance / SweepIntervals;
const FVector DeltaDirection = DeltaDistance * Direction;
float CurrentDistance = DeltaDistance / 2;
FCollisionShape Shape;
AEyeXActorBase* EyeXActor = nullptr;
for (int i = 0; i < SweepIntervals; ++i)
{
const FVector End = Start + DeltaDirection;
const float Radius = (i == 0) ? 0.0f : TanFOVScaled * CurrentDistance; // Depends on the view frustrum, size of the screen and the distance.
Shape.SetSphere(Radius);
if (World->SweepSingle(OutHit, Start, End, FQuat::Identity, Shape, TraceParams, ObjectParams))
{
EyeXActor = Cast<AEyeXActorBase>(OutHit.GetActor());
break;
}
Start = End;
CurrentDistance += DeltaDistance;
}
VisualizeHit(bVisualizeDetection, World, OutHit, Shape.GetSphereRadius());
VisualizeGazePoint(bVisualizeDetection, World, Start);
return EyeXActor;
}
bool AGameplayAbilityTargetActor_GroundTrace::AdjustCollisionResultForShape(const FVector OriginalStartPoint, const FVector OriginalEndPoint, const FCollisionQueryParams Params, FHitResult& OutHitResult) const
{
UWorld *ThisWorld = GetWorld();
//Pull back toward player to find a better spot, accounting for the width of our object
FVector Movement = (OriginalEndPoint - OriginalStartPoint);
FVector MovementDirection = Movement.SafeNormal();
float MovementMagnitude2D = Movement.Size2D();
if (bDebug)
{
if (CollisionHeight > 0.0f)
{
DrawDebugCapsule(ThisWorld, OriginalEndPoint, CollisionHeight * 0.5f, CollisionRadius, FQuat::Identity, FColor::Black);
}
else
{
DrawDebugSphere(ThisWorld, OriginalEndPoint, CollisionRadius, 8, FColor::Black);
}
}
if ((MovementMagnitude2D < (CollisionRadius * 2.0f)) || (CollisionRadius <= 1.0f))
{
return false; //Bad case!
}
float IncrementSize = FMath::Clamp<float>(CollisionRadius * 0.5f, 25.0f, 250.0f);
float LerpIncrement = IncrementSize / MovementMagnitude2D;
FHitResult LocalResult;
FVector TraceStart;
FVector TraceEnd;
//This needs to ramp up - the first few increments should be small, then we should start moving in larger steps.
for (float LerpValue = CollisionRadius / MovementMagnitude2D; LerpValue < 1.0f; LerpValue += LerpIncrement)
{
TraceEnd = TraceStart = OriginalEndPoint - (LerpValue * Movement);
TraceEnd.Z -= 99999.0f;
ThisWorld->SweepSingle(LocalResult, TraceStart, TraceEnd, FQuat::Identity, TraceChannel, CollisionShape, Params);
if (!LocalResult.bStartPenetrating)
{
if (!LocalResult.bBlockingHit)
{
//This is probably off the map and should not be considered valid. This should not happen in a non-debug map.
if (bDebug)
{
if (CollisionHeight > 0.0f)
{
DrawDebugCapsule(ThisWorld, LocalResult.Location, CollisionHeight * 0.5f, CollisionRadius, FQuat::Identity, FColor::Yellow);
}
else
{
DrawDebugSphere(ThisWorld, LocalResult.Location, CollisionRadius, 8, FColor::Yellow);
}
}
continue;
//LocalResult.Location = TraceStart;
}
if (bDebug)
{
if (CollisionHeight > 0.0f)
{
DrawDebugCapsule(ThisWorld, LocalResult.Location, CollisionHeight * 0.5f, CollisionRadius, FQuat::Identity, FColor::Green);
}
else
{
DrawDebugSphere(ThisWorld, LocalResult.Location, CollisionRadius, 8, FColor::Green);
}
}
OutHitResult = LocalResult;
return true;
}
if (bDebug)
{
if (CollisionHeight > 0.0f)
{
DrawDebugCapsule(ThisWorld, TraceStart, CollisionHeight * 0.5f, CollisionRadius, FQuat::Identity, FColor::Red);
}
else
{
DrawDebugSphere(ThisWorld, TraceStart, CollisionRadius, 8, FColor::Red);
}
}
}
return false;
}
FORCEINLINE_DEBUGGABLE FVector RunBoxTrace(const FVector& StartPos, const FVector& EndPos)
{
FHitResult OutHit;
const bool bHit = World->SweepSingle(OutHit, StartPos, EndPos, FQuat((EndPos - StartPos).Rotation()), Channel, FCollisionShape::MakeBox(Extent), Params);
return bHit ? OutHit.ImpactPoint : EndPos;
}
FORCEINLINE_DEBUGGABLE FVector RunCapsuleTrace(const FVector& StartPos, const FVector& EndPos)
{
FHitResult OutHit;
const bool bHit = World->SweepSingle(OutHit, StartPos, EndPos, FQuat::Identity, Channel, FCollisionShape::MakeCapsule(Extent.X, Extent.Z), Params);
return bHit ? OutHit.ImpactPoint : EndPos;
}