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> Unreal Engine API Reference > Plugins > HairStrandsCore > Niagara > FNDIHairStrandsData

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FNDIHairStrandsData

Data stored per strand base instance

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References

Module	HairStrandsCore
Header	/Engine/Plugins/Runtime/HairStrands/Source/HairStrandsCore/Public/Niagara/NiagaraDataInterfaceHairStrands.h
Include	#include "Niagara/NiagaraDataInterfaceHairStrands.h"

Syntax

struct FNDIHairStrandsData

Remarks

Data stored per strand base instance

Variables

	Name	Description
float	AirDrag	Coefficient between 0 and 1 to be used for the air drag
FVector	AirVelocity	Velocity of the surrounding air in cm/s
float	BendDamping	Damping for the bend constraint between 0 and 1
float	BendStiffness	Stiffness for the bend constraint in GPa
float	CollisionRadius	Radius scale along the strand
bool	ForceReset	Force reset simulation
bool	GlobalInterpolation	Global Interpolation
FVector	GravityVector	Acceleration vector in cm/s2 to be used for the gravity
FIntVector	GridDimension	Grid Dimension used to compute the viscosity forces
FNDIHairStrands...	HairStrandsBuffer	Strands Gpu buffer
int32	IterationCount	Number of iterations for the constraint solver
float	KineticFriction	Kinetic friction used for collision against the physics asset
int32	NumStrands	Number of strands
TStaticArray< f...	ParamsScale	Scales along the strand
bool	ProjectBend	Enable the solve of the bend constraint during the xpbd loop
bool	ProjectCollision	Enable ther projection of the collision constraint after the xpbd loop
bool	ProjectStretch	Enable the projection of the stretch constraint after the xpbd loop
uint32	SkeletalMeshes	List of all the skel meshes in the hierarchy
bool	SolveBend	Velocity of the surrounding air in cm/s
bool	SolveCollision	Enable the solve of the collision constraint during the xpbd loop
bool	SolveStretch	Enable the solve of the stretch constraint during the xpbd loop
float	StaticFriction	Static friction used for collision against the physics asset
float	StrandsDensity	Density of the strands in g/cm3
int32	StrandsSize	Strand size
float	StrandsSmoothing	Smoothing between 0 and 1 of the incoming guides curves for better stability
float	StrandsThickness	Strands thickness in cm that will be used for mass and inertia computation
float	StrandsViscosity	Radius that will be used for the collision detection against the physics asset
float	StretchDamping	Damping for the stretch constraint between 0 and 1
float	StretchStiffness	Stiffness for the stretch constraint in GPa
int32	SubSteps	Number of substeps to be used
int32	TickCount	Tick Count
ETickingGroup	TickingGroup	The instance ticking group
FTransform	WorldTransform	Cached World transform.

Constructors

	Name	Description
	FNDIHairStrandsData()

Functions

	Name	Description
void	CopyDatas ( const FNDIHairStrandsData* Oth... )
bool	Init ( UNiagaraDataInterfaceHairStrands&#..., FNiagaraSystemInstance* System... )	Initialize the buffers
void	Release()	Release the buffers
void	ResetDatas()
void	Update ( UNiagaraDataInterfaceHairStrands&#..., FNiagaraSystemInstance* System..., const FHairStrandsDatas* HairS..., UGroomAsset* GroomAsset, const int32 GroupIndex, const FTransform& LocalToWorld )	Update the buffers

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