FSimplifyMedialSkeletonDataflowNode_v2 | Unreal Engine 5.8 Documentation

API > API/Plugins > API/Plugins/GeometryCollectionNodes

Simplify a medial skeleton using the quadric error metric


Name	FSimplifyMedialSkeletonDataflowNode_v2
Type	struct
Header File	/Engine/Plugins/Experimental/GeometryCollectionPlugin/Source/GeometryCollectionNodes/Public/Dataflow/GeometryCollectionSamplingNodes.h
Include Path	#include "Dataflow/GeometryCollectionSamplingNodes.h"

Syntax

USTRUCT (Meta=(DataflowGeometryCollection))  
struct FSimplifyMedialSkeletonDataflowNode_v2 : public FDataflowNode

Inheritance Hierarchy

FSharedFromThisBase → TSharedFromThis → FDataflowNode → FSimplifyMedialSkeletonDataflowNode_v2

Constructors

Name	Remarks	Include Path	Unreal Specifiers
FSimplifyMedialSkeletonDataflowNode_v2 ( const UE::Dataflow::FNodeParameters& InParam, FGuid InGuid )		Dataflow/GeometryCollectionSamplingNodes.h

Variables

Public

Name	Type	Remarks	Include Path	Unreal Specifiers
bOnlySimplifySurfaces	bool	If true, only simplify edges of skeleton surfaces (edges that have triangles associated)	Dataflow/GeometryCollectionSamplingNodes.h	EditAnywhere Category=Options Meta=(DataflowInput)
bPreventEdgeSurfaceIntersections	bool	If true, prevent collapses that would introduce intersections between skeleton edges and the mesh.	Dataflow/GeometryCollectionSamplingNodes.h	EditAnywhere Category=Options Meta=(DataflowInput)
bSplitThinTriEdges	bool	Whether to split edges attached to skinny triangles before simplifying, which can add useful degrees of freedom to the simplifier.	Dataflow/GeometryCollectionSamplingNodes.h	EditAnywhere Category=Options AdvancedDisplay Meta=(DataflowInput)
ClusterRegularizeWeight	float	Regularization weight encouraging skeleton clusters to keep their original positions and radii.	Dataflow/GeometryCollectionSamplingNodes.h
ClusterSkeletonDistanceWt	float	How much the simplifier should attempt to remain close to the initial skeleton, vs keeping medial spheres close to the mesh surface.	Dataflow/GeometryCollectionSamplingNodes.h	EditAnywhere Category=Options Meta=(DataflowInput, ClampMin=0, ClampMax=1, UIMax=.9999)
EdgeLengthThreshold	float	If positive, the maximum edge length to consider for collapse.	Dataflow/GeometryCollectionSamplingNodes.h	EditAnywhere Category=Options Meta=(DataflowInput, ClampMin=0, Units="cm")
MedialSpheres	TArray< FSphere >		Dataflow/GeometryCollectionSamplingNodes.h	Meta=(DataflowOutput, DataflowRenderGroups="None")
MinSpheres	int32	Stop simplifying at this sphere count.	Dataflow/GeometryCollectionSamplingNodes.h	EditAnywhere Category=Options Meta=(DataflowInput, ClampMin=1)
QEMErrorThresholdSqrt	float	If positive, will not collapse edges if it would introduce more quadric error than the square of this threshold.	Dataflow/GeometryCollectionSamplingNodes.h	EditAnywhere Category=Options AdvancedDisplay Meta=(DataflowInput, ClampMin=0, DisplayName="Quadric Error Threshold (Sqrt)")
SphereOverlapThreshold	float	If positive, the minimum medial sphere overlap fraction to consider for collapse so e.g. at 1.0 we will only collapse an edge if its smaller medial sphere is contained in the larger.	Dataflow/GeometryCollectionSamplingNodes.h	EditAnywhere Category=Options Meta=(DataflowInput, ClampMin=0, ClampMax=1)
SphereRadiusThreshold	float	If positive, the maximum sphere radius to consider for collapse. If either cluster's medial sphere on an edge has smaller radii, it is allowed to collapse.	Dataflow/GeometryCollectionSamplingNodes.h	EditAnywhere Category=Options Meta=(DataflowInput, ClampMin=0, Units="cm")
SplitThinTriEdgeAngleThresholdDeg	float	Minimum angle (degrees) at the opposite vertex for an edge to be a split candidate.	Dataflow/GeometryCollectionSamplingNodes.h	EditAnywhere Category=Options AdvancedDisplay Meta=(EditCondition="bSplitThinTriEdges", DataflowInput, ClampMin=90, ClampMax=180)
SplitThinTriEdgePosErrorWt	float	Position error weight used when re-clustering vertices after thin-triangle edge splits.	Dataflow/GeometryCollectionSamplingNodes.h	EditAnywhere Category=Options AdvancedDisplay Meta=(EditCondition="bSplitThinTriEdges", DataflowInput, ClampMin=0, ClampMax=1)
TargetMesh	DATAFLOW_NODE_DEFINE_INTERNAL(FSimplifyMedialSkeletonDataflowNode_v2, "SimplifyMedialSkeleton", "MedialSkeletonSampling", "Reduce") private TObjectPtr< UDataflowMesh >	Medial skeleton to simplify Mesh the skeleton was sampled from, used to compute the error metric	Dataflow/GeometryCollectionSamplingNodes.h	Meta=(DataflowInput, DataflowIntrinsic)

Functions

Public

Public Virtual

Overridden from FDataflowNode

Name	Remarks	Include Path	Unreal Specifiers
virtual void Evaluate ( UE::Dataflow::FContext& Context, const FDataflowOutput* Out ) const		Dataflow/GeometryCollectionSamplingNodes.h

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Syntax

Inheritance Hierarchy

Constructors

Variables

Public

Functions

Public

Public Virtual

Overridden from FDataflowNode