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SceneSnappingManager: add ::PauseSceneGeometryUpdates() and ::UnPauseSceneGeometryUpdates(), these temporarily disable/re-enable geometry updates (eg BVH rebuilds) on DynamicMeshComponents, for use in live-edit situations where we can't defer mesh updates (because render geometry needs to update) but don't want a per-frame BVH build

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#rb none
#preflight 62ab7bb82804d6adf7f72f97

[CL 20692560 by Ryan Schmidt in ue5-main branch]
This commit is contained in:
Ryan Schmidt
2022-06-16 15:25:58 -04:00
parent f256e02821
commit 636abcceee
2 changed files with 58 additions and 2 deletions
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36
Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Private/Snapping/ModelingSceneSnappingManager.cpp
View File

@@ -250,11 +250,43 @@ void UModelingSceneSnappingManager::HandleGlobalComponentTransformChangedDelegat
void UModelingSceneSnappingManager::HandleDynamicMeshModifiedDelegate(UDynamicMeshComponent* Component)
{
const bool bDeferRebuild = false;
SpatialCache->NotifyGeometryUpdate(Component, bDeferRebuild);
if (bQueueModifiedDynamicMeshUpdates)
{
PendingModifiedDynamicMeshes.Add(Component);
}
else
{
const bool bDeferRebuild = false;
SpatialCache->NotifyGeometryUpdate(Component, bDeferRebuild);
}
}
void UModelingSceneSnappingManager::PauseSceneGeometryUpdates()
{
ensure(bQueueModifiedDynamicMeshUpdates == false);
bQueueModifiedDynamicMeshUpdates = true;
}
void UModelingSceneSnappingManager::UnPauseSceneGeometryUpdates(bool bImmediateRebuilds)
{
if (ensure(bQueueModifiedDynamicMeshUpdates))
{
for (UDynamicMeshComponent* Component : PendingModifiedDynamicMeshes)
{
SpatialCache->NotifyGeometryUpdate(Component, !bImmediateRebuilds);
}
PendingModifiedDynamicMeshes.Reset();
bQueueModifiedDynamicMeshUpdates = false;
}
}
void UModelingSceneSnappingManager::BuildSpatialCacheForWorld(
UWorld* World,
TFunctionRef<bool(AActor*)> ActorFilter,

24
Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Public/Snapping/ModelingSceneSnappingManager.h
View File

@@ -92,6 +92,26 @@ public:
TFunctionRef<bool(AActor*)> ActorFilter,
TFunctionRef<bool(UPrimitiveComponent*)> PrimitiveFilter );
//
// APIs for configuring the SceneSnappingManager behavior
//
public:
/***
* Temporarily disable live updates of any modified Actors/Components. Any changes that are
* detected while updates are paused will be executed on Unpause.
* This is mainly intended for use in interactive operations, eg while live-editing a mesh,
* changes may be posted every frame but the cache BVHs/etc only need to be updated on mouse-up, etc
*/
virtual void PauseSceneGeometryUpdates();
/**
* Re-enable live updates that were prevented by PauseSceneGeometryUpdates(), and execute
* any pending updates that were requested while in the pause state.
* @param bImmediateRebuilds If true (default), things like BVH updates will happen immediately, instead of simply being marked as pending
*/
virtual void UnPauseSceneGeometryUpdates(bool bImmediateRebuilds = true);
protected:
UPROPERTY()
@@ -117,6 +137,10 @@ protected:
TMap<UPrimitiveComponent*, TWeakObjectPtr<UDynamicMeshComponent>> DynamicMeshComponents;
void HandleDynamicMeshModifiedDelegate(UDynamicMeshComponent* Component);
// PauseSceneGeometryUpdates / UnPauseSceneGeometryUpdates support
bool bQueueModifiedDynamicMeshUpdates = false;
TSet<UDynamicMeshComponent*> PendingModifiedDynamicMeshes;
};