bool UMovementComponent::ResolvePenetrationImpl(const FVector& ProposedAdjustment, const FHitResult& Hit, const FQuat& NewRotationQuat)
{
// SceneComponent can't be in penetration, so this function really only applies to PrimitiveComponent.
const FVector Adjustment = ConstrainDirectionToPlane(ProposedAdjustment);
if (!Adjustment.IsZero() && UpdatedPrimitive)
{
// See if we can fit at the adjusted location without overlapping anything.
AActor* ActorOwner = UpdatedComponent->GetOwner();
if (!ActorOwner)
{
return false;
}
UE_LOG(LogMovement, Verbose, TEXT("ResolvePenetration: %s.%s at location %s inside %s.%s at location %s by %.3f (netmode: %d)"),
*ActorOwner->GetName(),
*UpdatedComponent->GetName(),
*UpdatedComponent->GetComponentLocation().ToString(),
*GetNameSafe(Hit.GetActor()),
*GetNameSafe(Hit.GetComponent()),
Hit.Component.IsValid() ? *Hit.GetComponent()->GetComponentLocation().ToString() : TEXT("<unknown>"),
Hit.PenetrationDepth,
(uint32)GetNetMode());
// We really want to make sure that precision differences or differences between the overlap test and sweep tests don't put us into another overlap,
// so make the overlap test a bit more restrictive.
const float OverlapInflation = CVarPenetrationOverlapCheckInflation.GetValueOnGameThread();
bool bEncroached = OverlapTest(Hit.TraceStart + Adjustment, NewRotationQuat, UpdatedPrimitive->GetCollisionObjectType(), UpdatedPrimitive->GetCollisionShape(OverlapInflation), ActorOwner);
if (!bEncroached)
{
// Move without sweeping.
MoveUpdatedComponent(Adjustment, NewRotationQuat, false, nullptr, ETeleportType::TeleportPhysics);
UE_LOG(LogMovement, Verbose, TEXT("ResolvePenetration: teleport by %s"), *Adjustment.ToString());
return true;
}
else
{
// Disable MOVECOMP_NeverIgnoreBlockingOverlaps if it is enabled, otherwise we wouldn't be able to sweep out of the object to fix the penetration.
TGuardValue<EMoveComponentFlags> ScopedFlagRestore(MoveComponentFlags, EMoveComponentFlags(MoveComponentFlags & (~MOVECOMP_NeverIgnoreBlockingOverlaps)));
// Try sweeping as far as possible...
FHitResult SweepOutHit(1.f);
bool bMoved = MoveUpdatedComponent(Adjustment, NewRotationQuat, true, &SweepOutHit, ETeleportType::TeleportPhysics);
UE_LOG(LogMovement, Verbose, TEXT("ResolvePenetration: sweep by %s (success = %d)"), *Adjustment.ToString(), bMoved);
// Still stuck?
if (!bMoved && SweepOutHit.bStartPenetrating)
{
// Combine two MTD results to get a new direction that gets out of multiple surfaces.
const FVector SecondMTD = GetPenetrationAdjustment(SweepOutHit);
const FVector CombinedMTD = Adjustment + SecondMTD;
if (SecondMTD != Adjustment && !CombinedMTD.IsZero())
{
bMoved = MoveUpdatedComponent(CombinedMTD, NewRotationQuat, true, nullptr, ETeleportType::TeleportPhysics);
UE_LOG(LogMovement, Verbose, TEXT("ResolvePenetration: sweep by %s (MTD combo success = %d)"), *CombinedMTD.ToString(), bMoved);
}
}
// Still stuck?
if (!bMoved)
{
// Try moving the proposed adjustment plus the attempted move direction. This can sometimes get out of penetrations with multiple objects
const FVector MoveDelta = ConstrainDirectionToPlane(Hit.TraceEnd - Hit.TraceStart);
if (!MoveDelta.IsZero())
{
bMoved = MoveUpdatedComponent(Adjustment + MoveDelta, NewRotationQuat, true, nullptr, ETeleportType::TeleportPhysics);
UE_LOG(LogMovement, Verbose, TEXT("ResolvePenetration: sweep by %s (adjusted attempt success = %d)"), *(Adjustment + MoveDelta).ToString(), bMoved);
}
}
return bMoved;
}
}
return false;
}
void UProjectileMovementComponent::TickComponent(float DeltaTime, enum ELevelTick TickType, FActorComponentTickFunction *ThisTickFunction)
{
QUICK_SCOPE_CYCLE_COUNTER( STAT_ProjectileMovementComponent_TickComponent );
// skip if don't want component updated when not rendered or updated component can't move
if (HasStoppedSimulation() || ShouldSkipUpdate(DeltaTime))
{
return;
}
Super::TickComponent(DeltaTime, TickType, ThisTickFunction);
AActor* ActorOwner = UpdatedComponent->GetOwner();
if ( !ActorOwner || !CheckStillInWorld() )
{
return;
}
if (UpdatedComponent->IsSimulatingPhysics())
{
return;
}
float RemainingTime = DeltaTime;
uint32 NumBounces = 0;
int32 Iterations = 0;
FHitResult Hit(1.f);
while( RemainingTime >= MIN_TICK_TIME && (Iterations < MaxSimulationIterations) && !ActorOwner->IsPendingKill() && !HasStoppedSimulation() )
{
Iterations++;
// subdivide long ticks to more closely follow parabolic trajectory
const float TimeTick = ShouldUseSubStepping() ? GetSimulationTimeStep(RemainingTime, Iterations) : RemainingTime;
RemainingTime -= TimeTick;
Hit.Time = 1.f;
const FVector OldVelocity = Velocity;
const FVector MoveDelta = ComputeMoveDelta(OldVelocity, TimeTick);
const FRotator NewRotation = (bRotationFollowsVelocity && !OldVelocity.IsNearlyZero(0.01f)) ? OldVelocity.Rotation() : ActorOwner->GetActorRotation();
// Move the component
if (bShouldBounce)
{
// If we can bounce, we are allowed to move out of penetrations, so use SafeMoveUpdatedComponent which does that automatically.
SafeMoveUpdatedComponent( MoveDelta, NewRotation, true, Hit );
}
else
{
// If we can't bounce, then we shouldn't adjust if initially penetrating, because that should be a blocking hit that causes a hit event and stop simulation.
TGuardValue<EMoveComponentFlags> ScopedFlagRestore(MoveComponentFlags, MoveComponentFlags | MOVECOMP_NeverIgnoreBlockingOverlaps);
MoveUpdatedComponent(MoveDelta, NewRotation, true, &Hit );
}
// If we hit a trigger that destroyed us, abort.
if( ActorOwner->IsPendingKill() || HasStoppedSimulation() )
{
return;
}
// Handle hit result after movement
if( !Hit.bBlockingHit )
{
PreviousHitTime = 1.f;
bIsSliding = false;
// Only calculate new velocity if events didn't change it during the movement update.
if (Velocity == OldVelocity)
{
Velocity = ComputeVelocity(Velocity, TimeTick);
}
}
else
{
// Only calculate new velocity if events didn't change it during the movement update.
if (Velocity == OldVelocity)
{
// re-calculate end velocity for partial time
Velocity = (Hit.Time > KINDA_SMALL_NUMBER) ? ComputeVelocity(OldVelocity, TimeTick * Hit.Time) : OldVelocity;
}
// Handle blocking hit
float SubTickTimeRemaining = TimeTick * (1.f - Hit.Time);
const EHandleBlockingHitResult HandleBlockingResult = HandleBlockingHit(Hit, TimeTick, MoveDelta, SubTickTimeRemaining);
if (HandleBlockingResult == EHandleBlockingHitResult::Abort || HasStoppedSimulation())
{
break;
}
else if (HandleBlockingResult == EHandleBlockingHitResult::Deflect)
{
NumBounces++;
HandleDeflection(Hit, OldVelocity, NumBounces, SubTickTimeRemaining);
PreviousHitTime = Hit.Time;
PreviousHitNormal = ConstrainNormalToPlane(Hit.Normal);
}
else if (HandleBlockingResult == EHandleBlockingHitResult::AdvanceNextSubstep)
{
// Reset deflection logic to ignore this hit
PreviousHitTime = 1.f;
}
else
{
// Unhandled EHandleBlockingHitResult
checkNoEntry();
}
// A few initial bounces should add more time and iterations to complete most of the simulation.
if (NumBounces <= 2 && SubTickTimeRemaining >= MIN_TICK_TIME)
{
RemainingTime += SubTickTimeRemaining;
Iterations--;
}
}
}
UpdateComponentVelocity();
}
void UInterpToMovementComponent::TickComponent(float DeltaTime, enum ELevelTick TickType, FActorComponentTickFunction *ThisTickFunction)
{
QUICK_SCOPE_CYCLE_COUNTER(STAT_InterpToMovementComponent_TickComponent);
Super::TickComponent(DeltaTime, TickType, ThisTickFunction);
// skip if don't want component updated when not rendered or updated component can't move
if (!UpdatedComponent || ShouldSkipUpdate(DeltaTime))
{
return;
}
AActor* ActorOwner = UpdatedComponent->GetOwner();
if (!ActorOwner || !CheckStillInWorld())
{
return;
}
if (UpdatedComponent->IsSimulatingPhysics())
{
return;
}
if((bStopped == true ) || ( ActorOwner->IsPendingKill() ) )
{
return;
}
if( ControlPoints.Num()== 0 )
{
return;
}
// This will update any control points coordinates that are linked to actors.
UpdateControlPoints(false);
float RemainingTime = DeltaTime;
int32 NumBounces = 0;
int32 Iterations = 0;
FHitResult Hit(1.f);
FVector WaitPos = FVector::ZeroVector;
if (bIsWaiting == true)
{
WaitPos = UpdatedComponent->GetComponentLocation();
}
while (RemainingTime >= MIN_TICK_TIME && (Iterations < MaxSimulationIterations) && !ActorOwner->IsPendingKill() && UpdatedComponent)
{
Iterations++;
const float TimeTick = ShouldUseSubStepping() ? GetSimulationTimeStep(RemainingTime, Iterations) : RemainingTime;
RemainingTime -= TimeTick;
// Calculate the current time with this tick iteration
float Time = FMath::Clamp(CurrentTime + ((DeltaTime*TimeMultiplier)*CurrentDirection),0.0f,1.0f);
FVector MoveDelta = ComputeMoveDelta(Time);
// Update the rotation on the spline if required
FRotator CurrentRotation = UpdatedComponent->GetComponentRotation();
// Move the component
if ((bPauseOnImpact == false ) && (BehaviourType != EInterpToBehaviourType::OneShot))
{
// If we can bounce, we are allowed to move out of penetrations, so use SafeMoveUpdatedComponent which does that automatically.
SafeMoveUpdatedComponent(MoveDelta, CurrentRotation, true, Hit);
}
else
{
// If we can't bounce, then we shouldn't adjust if initially penetrating, because that should be a blocking hit that causes a hit event and stop simulation.
TGuardValue<EMoveComponentFlags> ScopedFlagRestore(MoveComponentFlags, MoveComponentFlags | MOVECOMP_NeverIgnoreBlockingOverlaps);
MoveUpdatedComponent(MoveDelta, CurrentRotation, true, &Hit);
}
//DrawDebugPoint(GetWorld(), UpdatedComponent->GetComponentLocation(), 16, FColor::White,true,5.0f);
// If we hit a trigger that destroyed us, abort.
if (ActorOwner->IsPendingKill() || !UpdatedComponent)
{
return;
}
// Handle hit result after movement
if (!Hit.bBlockingHit)
{
// If we were 'waiting' were not any more - broadcast we are off again
if( bIsWaiting == true )
{
OnWaitEndDelegate.Broadcast(Hit, Time);
bIsWaiting = false;
}
else
{
CalculateNewTime(CurrentTime, TimeTick, Hit, true, bStopped);
if (bStopped == true)
{
return;
}
}
}
else
{
if (HandleHitWall(Hit, TimeTick, MoveDelta))
{
break;
}
NumBounces++;
float SubTickTimeRemaining = TimeTick * (1.f - Hit.Time);
// A few initial bounces should add more time and iterations to complete most of the simulation.
if (NumBounces <= 2 && SubTickTimeRemaining >= MIN_TICK_TIME)
{
RemainingTime += SubTickTimeRemaining;
Iterations--;
}
}
}
if( bIsWaiting == false )
{
FHitResult DummyHit;
CurrentTime = CalculateNewTime(CurrentTime, DeltaTime, DummyHit, false, bStopped);
}
UpdateComponentVelocity();
}
