void UGripMotionControllerComponent::FViewExtension::GatherLateUpdatePrimitives(USceneComponent* Component, TArray<LateUpdatePrimitiveInfo>& Primitives)
{
// If a scene proxy is present, cache it
UPrimitiveComponent* PrimitiveComponent = dynamic_cast<UPrimitiveComponent*>(Component);
if (PrimitiveComponent && PrimitiveComponent->SceneProxy)
{
FPrimitiveSceneInfo* PrimitiveSceneInfo = PrimitiveComponent->SceneProxy->GetPrimitiveSceneInfo();
if (PrimitiveSceneInfo)
{
LateUpdatePrimitiveInfo PrimitiveInfo;
PrimitiveInfo.IndexAddress = PrimitiveSceneInfo->GetIndexAddress();
PrimitiveInfo.SceneInfo = PrimitiveSceneInfo;
Primitives.Add(PrimitiveInfo);
}
}
// Gather children proxies
const int32 ChildCount = Component->GetNumChildrenComponents();
for (int32 ChildIndex = 0; ChildIndex < ChildCount; ++ChildIndex)
{
USceneComponent* ChildComponent = Component->GetChildComponent(ChildIndex);
if (!ChildComponent)
{
continue;
}
GatherLateUpdatePrimitives(ChildComponent, Primitives);
}
}
//=============================================================================
void UMotionControllerComponent::FViewExtension::BeginRenderViewFamily(FSceneViewFamily& InViewFamily)
{
if (!MotionControllerComponent)
{
return;
}
FScopeLock ScopeLock(&CritSect);
if (!MotionControllerComponent || MotionControllerComponent->bDisableLowLatencyUpdate || !CVarEnableMotionControllerLateUpdate.GetValueOnGameThread())
{
return;
}
LateUpdatePrimitives.Reset();
GatherLateUpdatePrimitives(MotionControllerComponent, LateUpdatePrimitives);
}
void UGripMotionControllerComponent::FViewExtension::BeginRenderViewFamily(FSceneViewFamily& InViewFamily)
{
if (!MotionControllerComponent)
{
return;
}
FScopeLock ScopeLock(&CritSect);
if (MotionControllerComponent->bDisableLowLatencyUpdate || !CVarEnableMotionControllerLateUpdate->GetValueOnGameThread())
{
return;
}
LateUpdatePrimitives.Reset();
GatherLateUpdatePrimitives(MotionControllerComponent, LateUpdatePrimitives);
// Loop through gripped actors
for (FBPActorGripInformation actor : MotionControllerComponent->GrippedActors)
{
// Attached actors will already register as is above, so skipping GripWithAttachTo actors
if (actor.bTurnOffLateUpdateWhenColliding && actor.bColliding)
continue;
if (actor.Actor)
{
// Get primitive components attached to the actor and update them with the late motion controller offset
TInlineComponentArray<UPrimitiveComponent*> PrimComps(actor.Actor);
for (UPrimitiveComponent * PrimitiveComponent : PrimComps)
{
GatherLateGripUpdatePrimitives(PrimitiveComponent, LateUpdatePrimitives);
}
}
else if (actor.Component)
{
GatherLateGripUpdatePrimitives(actor.Component, LateUpdatePrimitives);
}
}
}
void IHeadMountedDisplay::SetupLateUpdate(const FTransform& ParentToWorld, USceneComponent* Component)
{
LateUpdateParentToWorld = ParentToWorld;
LateUpdatePrimitives.Reset();
GatherLateUpdatePrimitives(Component, LateUpdatePrimitives);
}
