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  3. FNDIHairStrandsData

FNDIHairStrandsData

Data stored per strand base instance

API > API/Plugins > API/Plugins/HairStrandsCore > API/Plugins/HairStrandsCore/Niagara

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

  Type Name Description
Public variable float AirDrag Coefficient between 0 and 1 to be used for the air drag
Public variable FVector AirVelocity Velocity of the surrounding air in cm/s
Public variable float BendDamping Damping for the bend constraint between 0 and 1
Public variable float BendStiffness Stiffness for the bend constraint in GPa
Public variable EHairBindingType BindingType Binding type between the groom asset and the attached skeletal mesh
Public variable FVector3f BoneAngularAcceleration Bone Angular Acceleration
Public variable FVector3f BoneAngularVelocity Bone Angular Velocity
Public variable FVector3f BoneLinearAcceleration Bone Linear Acceleration
Public variable FVector3f BoneLinearVelocity Bone Linear Velocity
Public variable FTransform BoneTransform Bone transform that will be used for local strands simulation
Public variable bool bSkinningTransfer Skinning transfer from a source to a target skelmesh
Public variable float CollisionRadius Radius scale along the strand
Public variable bool ForceReset Force reset simulation
Public variable bool GlobalInterpolation Global Interpolation
Public variable float GravityPreloading Optimisation of the rest state configuration to compensate from the gravity
Public variable FVector GravityVector Acceleration vector in cm/s2 to be used for the gravity
Public variable FIntVector GridDimension Grid Dimension used to compute the viscosity forces
Public variable FHairGroupInstance * HairGroupInstance Hair group instance
Public variable TWeakObjectPtr< class UGroomComponent > HairGroupInstSource Source component of the hair group instance
Public variable FNDIHairStrandsBuffer * HairStrandsBuffer Strands Gpu buffer
Public variable int32 IterationCount Number of iterations for the constraint solver
Public variable float KineticFriction Kinetic friction used for collision against the physics asset
Public variable bool LocalSimulation Check if the simulation is running in local coordinate
Public variable int32 NumStrands Number of strands
Public variable TStaticArray< float, 32 *NumScales > ParamsScale Scales along the strand
Public variable FVector3f PreviousBoneAngularVelocity Bone Previous Angular Velocity
Public variable FVector3f PreviousBoneLinearVelocity Bone Previous Linear Velocity
Public variable FTransform PreviousBoneTransform Bone transform that will be used for local strands simulation
Public variable bool ProjectBend Enable the solve of the bend constraint during the xpbd loop
Public variable bool ProjectCollision Enable ther projection of the collision constraint after the xpbd loop
Public variable bool ProjectStretch Enable the projection of the stretch constraint after the xpbd loop
Public variable uint32 SkeletalMeshes List of all the skel meshes in the hierarchy
Public variable bool SolveBend Velocity of the surrounding air in cm/s
Public variable bool SolveCollision Enable the solve of the collision constraint during the xpbd loop
Public variable bool SolveStretch Enable the solve of the stretch constraint during the xpbd loop
Public variable float StaticFriction Static friction used for collision against the physics asset
Public variable float StrandsDensity Density of the strands in g/cm3
Public variable int32 StrandsSize Strand size
Public variable float StrandsSmoothing Smoothing between 0 and 1 of the incoming guides curves for better stability
Public variable float StrandsThickness Strands thickness in cm that will be used for mass and inertia computation
Public variable float StrandsViscosity Radius that will be used for the collision detection against the physics asset
Public variable float StretchDamping Damping for the stretch constraint between 0 and 1
Public variable float StretchStiffness Stiffness for the stretch constraint in GPa
Public variable int32 SubSteps Number of substeps to be used
Public variable int32 TickCount Tick Count
Public variable ETickingGroup TickingGroup The instance ticking group
Public variable FTransform WorldTransform Cached World transform.

Constructors

  Type Name Description
Public function    

Functions

  Type Name Description
Public function void

CopyDatas ( const FNDIHairStrandsData* OtherDatas
)

  
Public function bool Initialize the buffers
Public function void

Release ()

 Release the buffers
Public function void  
Public function void

Update ( UNiagaraDataInterfaceHairStrands* Interface,
FNiagaraSystemInstance* SystemInstance,
const FHairStrandsBulkData* HairStrandsDatas,
UGroomAsset* GroomAsset,
const int32 GroupIndex,
const int32 LODIndex,
const FTransform& LocalToWorld,
const float DeltaSeconds
)

 Update the buffers

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