void UGripMotionControllerComponent::TickGrip()
{
if (GrippedActors.Num())
{
FTransform WorldTransform;
FTransform InverseTransform = this->GetComponentTransform().Inverse();
for (int i = GrippedActors.Num() - 1; i >= 0; --i)
{
if (GrippedActors[i].Actor || GrippedActors[i].Component)
{
// GetRelativeTransformReverse had some serious f*****g floating point errors associated with it that was f*****g everything up
// Not sure whats wrong with the function but I might want to push a patch out eventually
WorldTransform = GrippedActors[i].RelativeTransform.GetRelativeTransform(InverseTransform);
UPrimitiveComponent *root = GrippedActors[i].Component;
AActor *actor = GrippedActors[i].Actor;
if (!root)
root = Cast<UPrimitiveComponent>(GrippedActors[i].Actor->GetRootComponent());
if (!root)
continue;
if (!actor)
actor = root->GetOwner();
if (!actor)
continue;
if (bIsServer)
{
// Handle collision intersection detection, this is used to intelligently manage some of the networking and late update features.
switch (GrippedActors[i].GripCollisionType.GetValue())
{
case EGripCollisionType::InteractiveCollisionWithPhysics:
case EGripCollisionType::InteractiveHybridCollisionWithSweep:
{
TArray<FOverlapResult> Hits;
FComponentQueryParams Params(NAME_None, this->GetOwner());
Params.bTraceAsyncScene = root->bCheckAsyncSceneOnMove;
Params.AddIgnoredActor(actor);
Params.AddIgnoredActors(root->MoveIgnoreActors);
if(GetWorld()->ComponentOverlapMulti(Hits, root, root->GetComponentLocation(), root->GetComponentQuat(), Params))
{
GrippedActors[i].bColliding = true;
}
else
{
GrippedActors[i].bColliding = false;
}
}
// Skip collision intersects with these types, they dont need it
case EGripCollisionType::PhysicsOnly:
case EGripCollisionType::SweepWithPhysics:
case EGripCollisionType::InteractiveCollisionWithSweep:
default:break;
}
}
// Need to figure out best default behavior
/*if (GrippedActors[i].bHasSecondaryAttachment && GrippedActors[i].SecondaryAttachment)
{
WorldTransform.SetRotation((WorldTransform.GetLocation() - GrippedActors[i].SecondaryAttachment->GetComponentLocation()).ToOrientationRotator().Quaternion());
}*/
if (GrippedActors[i].GripCollisionType == EGripCollisionType::InteractiveCollisionWithPhysics)
{
UpdatePhysicsHandleTransform(GrippedActors[i], WorldTransform);
}
else if (GrippedActors[i].GripCollisionType == EGripCollisionType::InteractiveCollisionWithSweep)
{
if (bIsServer)
{
FHitResult OutHit;
// Need to use without teleport so that the physics velocity is updated for when the actor is released to throw
root->SetWorldTransform(WorldTransform, true, &OutHit);
if (OutHit.bBlockingHit)
{
GrippedActors[i].bColliding = true;
if (!actor->bReplicateMovement)
actor->SetReplicateMovement(true);
}
else
{
GrippedActors[i].bColliding = false;
if (actor->bReplicateMovement)
actor->SetReplicateMovement(false);
}
}
else
{
if (!GrippedActors[i].bColliding)
{
root->SetWorldTransform(WorldTransform, true);
}
}
}
else if (GrippedActors[i].GripCollisionType == EGripCollisionType::InteractiveHybridCollisionWithSweep)
{
// Need to use without teleport so that the physics velocity is updated for when the actor is released to throw
//if (bIsServer)
//{
FBPActorPhysicsHandleInformation * GripHandle = GetPhysicsGrip(GrippedActors[i]);
if (!GrippedActors[i].bColliding)
{
// Make sure that there is no collision on course before turning off collision and snapping to controller
if (bIsServer && actor && actor->bReplicateMovement)
{
FCollisionQueryParams QueryParams(NAME_None, false, this->GetOwner());
FCollisionResponseParams ResponseParam;
root->InitSweepCollisionParams(QueryParams, ResponseParam);
QueryParams.AddIgnoredActor(actor);
QueryParams.AddIgnoredActors(root->MoveIgnoreActors);
if (GetWorld()->SweepTestByChannel(root->GetComponentLocation(), WorldTransform.GetLocation(), root->GetComponentQuat(), ECollisionChannel::ECC_Visibility, root->GetCollisionShape(), QueryParams, ResponseParam))
{
GrippedActors[i].bColliding = true;
}
else
{
GrippedActors[i].bColliding = false;
}
}
// If still not colliding
if (!GrippedActors[i].bColliding)
{
if (bIsServer && actor->bReplicateMovement) // So we don't call on on change event over and over locally
actor->SetReplicateMovement(false);
if (bIsServer && GripHandle)
{
DestroyPhysicsHandle(GrippedActors[i]);
if(GrippedActors[i].Actor)
GrippedActors[i].Actor->DisableComponentsSimulatePhysics();
else
root->SetSimulatePhysics(false);
}
root->SetWorldTransform(WorldTransform, false);
}
else
{
if (bIsServer && GrippedActors[i].bColliding && GripHandle)
UpdatePhysicsHandleTransform(GrippedActors[i], WorldTransform);
}
}
else if (GrippedActors[i].bColliding && !GripHandle)
{
if (bIsServer && !actor->bReplicateMovement)
actor->SetReplicateMovement(true);
root->SetSimulatePhysics(true);
if (bIsServer)
SetUpPhysicsHandle(GrippedActors[i]);
}
else
{
if (bIsServer && GrippedActors[i].bColliding && GripHandle)
UpdatePhysicsHandleTransform(GrippedActors[i], WorldTransform);
}
}
else if (GrippedActors[i].GripCollisionType == EGripCollisionType::SweepWithPhysics)
{
if (bIsServer)
{
FVector OriginalPosition(root->GetComponentLocation());
FRotator OriginalOrientation(root->GetComponentRotation());
FVector NewPosition(WorldTransform.GetTranslation());
FRotator NewOrientation(WorldTransform.GetRotation());
// Now sweep collision separately so we can get hits but not have the location altered
if (bUseWithoutTracking || NewPosition != OriginalPosition || NewOrientation != OriginalOrientation)
{
FVector move = NewPosition - OriginalPosition;
// ComponentSweepMulti does nothing if moving < KINDA_SMALL_NUMBER in distance, so it's important to not try to sweep distances smaller than that.
const float MinMovementDistSq = (FMath::Square(4.f*KINDA_SMALL_NUMBER));
if (bUseWithoutTracking || move.SizeSquared() > MinMovementDistSq || NewOrientation != OriginalOrientation)
{
if (CheckComponentWithSweep(root, move, NewOrientation, false))
{
}
}
}
// Move the actor, we are not offsetting by the hit result anyway
root->SetWorldTransform(WorldTransform, false);
}
else
{
// Move the actor, we are not offsetting by the hit result anyway
root->SetWorldTransform(WorldTransform, false);
}
}
else if (GrippedActors[i].GripCollisionType == EGripCollisionType::PhysicsOnly)
{
// Move the actor, we are not offsetting by the hit result anyway
root->SetWorldTransform(WorldTransform, false);
}
}
else
{
if (bIsServer)
{
DestroyPhysicsHandle(GrippedActors[i]);
GrippedActors.RemoveAt(i); // If it got garbage collected then just remove the pointer, won't happen with new uproperty use, but keeping it here anyway
}
}
}
}
}
bool UGripMotionControllerComponent::CheckComponentWithSweep(UPrimitiveComponent * ComponentToCheck, FVector Move, FRotator newOrientation, bool bSkipSimulatingComponents/*, bool &bHadBlockingHitOut*/)
{
TArray<FHitResult> Hits;
// WARNING: HitResult is only partially initialized in some paths. All data is valid only if bFilledHitResult is true.
FHitResult BlockingHit(NoInit);
BlockingHit.bBlockingHit = false;
BlockingHit.Time = 1.f;
bool bFilledHitResult = false;
bool bMoved = false;
bool bIncludesOverlapsAtEnd = false;
bool bRotationOnly = false;
UPrimitiveComponent *root = ComponentToCheck;
if (!root || !root->IsQueryCollisionEnabled())
return false;
FVector start(root->GetComponentLocation());
const bool bCollisionEnabled = root->IsQueryCollisionEnabled();
if (bCollisionEnabled)
{
#if !(UE_BUILD_SHIPPING || UE_BUILD_TEST)
if (!root->IsRegistered())
{
UE_LOG(LogTemp, Warning, TEXT("MovedComponent %s not initialized in grip motion controller"), *root->GetFullName());
}
#endif
UWorld* const MyWorld = GetWorld();
FComponentQueryParams Params(TEXT("sweep_params"), root->GetOwner());
FCollisionResponseParams ResponseParam;
root->InitSweepCollisionParams(Params, ResponseParam);
bool const bHadBlockingHit = MyWorld->ComponentSweepMulti(Hits, root, start, start + Move, newOrientation, Params);
if (bHadBlockingHit)
{
int32 BlockingHitIndex = INDEX_NONE;
float BlockingHitNormalDotDelta = BIG_NUMBER;
for (int32 HitIdx = 0; HitIdx < Hits.Num(); HitIdx++)
{
const FHitResult& TestHit = Hits[HitIdx];
// Ignore the owning actor to the motion controller
if (TestHit.Actor == this->GetOwner() || (bSkipSimulatingComponents && TestHit.Component->IsSimulatingPhysics()))
{
if (Hits.Num() == 1)
{
//bHadBlockingHitOut = false;
return false;
}
else
continue;
}
if (TestHit.bBlockingHit && TestHit.IsValidBlockingHit())
{
if (TestHit.Time == 0.f)
{
// We may have multiple initial hits, and want to choose the one with the normal most opposed to our movement.
const float NormalDotDelta = (TestHit.ImpactNormal | Move);
if (NormalDotDelta < BlockingHitNormalDotDelta)
{
BlockingHitNormalDotDelta = NormalDotDelta;
BlockingHitIndex = HitIdx;
}
}
else if (BlockingHitIndex == INDEX_NONE)
{
// First non-overlapping blocking hit should be used, if an overlapping hit was not.
// This should be the only non-overlapping blocking hit, and last in the results.
BlockingHitIndex = HitIdx;
break;
}
//}
}
}
// Update blocking hit, if there was a valid one.
if (BlockingHitIndex >= 0)
{
BlockingHit = Hits[BlockingHitIndex];
bFilledHitResult = true;
}
}
}
// Handle blocking hit notifications. Avoid if pending kill (which could happen after overlaps).
if (BlockingHit.bBlockingHit && !root->IsPendingKill())
{
check(bFilledHitResult);
if (root->IsDeferringMovementUpdates())
{
FScopedMovementUpdate* ScopedUpdate = root->GetCurrentScopedMovement();
ScopedUpdate->AppendBlockingHitAfterMove(BlockingHit);
}
else
{
if(root->GetOwner())
root->DispatchBlockingHit(*root->GetOwner(), BlockingHit);
}
return true;
}
return false;
}
