FGaussSeidelSpringConstraints

Spring constraint for position-based nonlinear Gauss Seidel solver [Chen et al., 2024].

API > API/Runtime > API/Runtime/Chaos

Spring constraint for position-based nonlinear Gauss Seidel solver [Chen et al., 2024].

   
Name FGaussSeidelSpringConstraints
Type struct
Header File /Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/Deformable/GaussSeidelWeakConstraints.h
Include Path #include "Chaos/Deformable/GaussSeidelWeakConstraints.h"

Syntax

struct FGaussSeidelSpringConstraints

Derived Classes

Constructors

Name Remarks Include Path Unreal Specifiers

FGaussSeidelSpringConstraints ( const TArray< TArray< int32 > >& InIndices,
const TArray< TArray< FSolverReal > >& InWeights,
const TArray< FSolverReal >& InStiffness,
const TArray< TArray< int32 > >& InSecondIndices,
const TArray< TArray< FSolverReal > >& InSecondWeights,
const FDeformableXPBDWeightedSpringConstraintParams& InParams,
bool bIsAnisotropic,
bool bIsZeroRestLength
)

 Scalar-bool overload: applies the same bIsAnisotropic and bIsZeroRestLength to all constraints. Chaos/Deformable/GaussSeidelWeakConstraints.h  

FGaussSeidelSpringConstraints ( const TArray< TArray< int32 > >& InIndices,
const TArray< TArray< FSolverReal > >& InWeights,
const TArray< FSolverReal >& InStiffness,
const TArray< TArray< int32 > >& InSecondIndices,
const TArray< TArray< FSolverReal > >& InSecondWeights,
const TArray< bool >& InIsAnisotropic,
const TArray< bool >& InZeroRestLength,
const FDeformableXPBDWeightedSpringConstraintParams& InParams
)

 TODO(Yizhou): Add unittest for Gauss Seidel Weak Constraints. Chaos/Deformable/GaussSeidelWeakConstraints.h  

FGaussSeidelSpringConstraints ( const TArray< TArray< int32 > >& InIndices,
const TArray< TArray< FSolverReal > >& InWeights,
const TArray< FSolverReal >& InStiffness,
const TArray< TArray< int32 > >& InSecondIndices,
const TArray< TArray< FSolverReal > >& InSecondWeights,
const FDeformableXPBDWeightedSpringConstraintParams& InParams
)

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

Destructors

Name Remarks Include Path Unreal Specifiers

virtual ~FGaussSeidelSpringConstraints()

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

Structs

Name Remarks
FGaussSeidelConstraintHandle  

Variables

Protected

Name Type Remarks Include Path Unreal Specifiers
DebugDrawParams FDeformableXPBDWeightedSpringConstraintParams   Chaos/Deformable/GaussSeidelWeakConstraints.h  
InitialWCSize int32   Chaos/Deformable/GaussSeidelWeakConstraints.h  

Functions

Public

Name Remarks Include Path Unreal Specifiers

void AddExtraConstraints ( const TArray< TArray< int32 > >& InIndices,
const TArray< TArray< FSolverReal > >& InWeights,
const TArray< FSolverReal >& InStiffness,
const TArray< TArray< int32 > >& InSecondIndices,
const TArray< TArray< FSolverReal > >& InSecondWeights,
const TArray< bool >& InIsAnisotropic,
const TArray< bool >& InIsZeroRestLength
)

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

void AddWCHessian ( const int32 ParticleIdx,
const FSolverReal Dt,
Chaos::PMatrix< FSolverReal, 3, 3 >& ParticleHessian
) const

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

void AddWCResidual ( const FSolverParticles& InParticles,
const int32 ConstraintIndex,
const int32 LocalIndex,
const FSolverReal Dt,
TVec3< FSolverReal >& ParticleResidual,
Chaos::PMatrix< FSolverReal, 3, 3 >& ParticleHessian
) const

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

void AddWCResidual ( const FSolverParticlesRange& InParticles,
const int32 ConstraintIndex,
const int32 LocalIndex,
const FSolverReal Dt,
TVec3< FSolverReal >& ParticleResidual,
Chaos::PMatrix< FSolverReal, 3, 3 >& ParticleHessian
) const

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

void AddZeroRestLengthWCResidualAndHessian ( const FSolverParticles& InParticles,
const int32 ConstraintIndex,
const int32 LocalIndex,
const FSolverReal Dt,
TVec3< FSolverReal >& ParticleResidual,
Chaos::PMatrix< FSolverReal, 3, 3 >& ParticleHessian
) const

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

void CollisionDetectionBVH ( const FSolverParticles& Particles,
const TArray< TVec3< int32 > >& SurfaceElements,
const TArray< int32 >& ComponentIndex,
float DetectRadius,
float PositionTargetStiffness,
bool UseAnisotropicSpring
)

 CollisionDetectionSpatialHash should be faster than CollisionDetectionBVH. Chaos/Deformable/GaussSeidelWeakConstraints.h  

void CollisionDetectionSpatialHash ( const FSolverParticles& Particles,
const TArray< int32 >& SurfaceVertices,
const FTriangleMesh& TriangleMesh,
const TArray< int32 >& ComponentIndex,
const SpatialAccelerator& Spatial,
float DetectRadius,
float PositionTargetStiffness,
bool UseAnisotropicSpring
)

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

void CollisionDetectionSpatialHashInComponent ( const FSolverParticles& Particles,
const TArray< int32 >& SurfaceVertices,
const FTriangleMesh& TriangleMesh,
const TMap< int32, TSet< int32 > >& ExcludeMap,
const SpatialAccelerator& Spatial,
float DetectRadius,
float PositionTargetStiffness,
bool UseAnisotropicSpring
)

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

void ComputeCollisionWCDataSimplified ( TArray< TArray< int32 > >& ExtraConstraints,
TArray< TArray< int32 > >& ExtraWCIncidentElements,
TArray< TArray< int32 > >& ExtraWCIncidentElementsLocal
)

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

void ComputeInitialWCData ( const FSolverParticles& InParticles
)

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

void ComputeInitialWCData ( const FSolverParticlesRange& InParticles
)

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

const FGaussSeidelSpringConstraintData & GetConstraintsData()

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

TArray< TArray< int32 > > GetDynamicConstraintArrays ( TArray< TArray< int32 > >& IncidentElements,
TArray< TArray< int32 > >& IncidentElementsLocal
) const

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

int32 GetInitialWCSize()

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

const TArray< TArray< int32 > > & GetStaticConstraintArrays ( TArray< TArray< int32 > >& IncidentElements,
TArray< TArray< int32 > >& IncidentElementsLocal
) const

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

const TArray< TArray< int32 > > & GetStaticConstraintArrays ( const TArray< TArray< int32 > >*& OutIncidentElements,
const TArray< TArray< int32 > >*& OutIncidentElementsLocal
) const

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

void Init ( const FSolverParticles& InParticles,
const FSolverReal Dt
)

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

void Init ( const FSolverParticlesRange& InParticles,
const FSolverReal Dt
)

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

Public Virtual

Protected

Name Remarks Include Path Unreal Specifiers

TVec3< FSolverReal > ComputeSpringEdge ( const FSolverParticles& InParticles,
const FSolverParticles& InSecondParticles,
const TArray< int32 >& LocalIndices,
const TArray< int32 >& LocalSecondIndices,
const TArray< FSolverReal >& Weight,
const TArray< FSolverReal >& SecondWeight,
bool bUseParticleX
) const

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

TVec3< FSolverReal > ComputeSpringEdge ( const FSolverParticlesRange& InParticles,
const FSolverParticlesRange& InSecondParticles,
const TArray< int32 >& LocalIndices,
const TArray< int32 >& LocalSecondIndices,
const TArray< FSolverReal >& Weight,
const TArray< FSolverReal >& SecondWeight,
bool bUseParticleX
) const

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

TVec3< FSolverReal > ComputeSpringEdge ( const FSolverParticles& InParticles,
const TArray< int32 >& LocalIndices,
const TArray< int32 >& LocalSecondIndices,
const TArray< FSolverReal >& Weight,
const TArray< FSolverReal >& SecondWeight,
bool bUseParticleX
) const

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

TVec3< FSolverReal > ComputeSpringEdge ( const FSolverParticlesRange& InParticles,
const TArray< int32 >& LocalIndices,
const TArray< int32 >& LocalSecondIndices,
const TArray< FSolverReal >& Weight,
const TArray< FSolverReal >& SecondWeight,
bool bUseParticleX
) const

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

void UpdateTriangleNormalAndNodalWeight ( const FSolverParticlesRange& InParticles,
const FSolverParticlesRange& InSecondParticles,
bool bUseParticleX
)

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

Protected Virtual

Name Remarks Include Path Unreal Specifiers

virtual void SetConstraintsRestLength ( const FSolverParticlesRange& InParticles,
const FSolverParticlesRange& InSecondParticles
)

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

virtual void SetNoCollisionData()

   Chaos/Deformable/GaussSeidelWeakConstraints.h  

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