2-D SPH solver. More...

#include <Core/Solver/Particle/SPH/SPHSolver2.hpp>

Inheritance diagram for CubbyFlow::SPHSolver2:

Classes
class	Builder
	Front-end to create SPHSolver2 objects step by step. More...

Public Member Functions
	SPHSolver2 ()
	Constructs a solver with empty particle set.

	SPHSolver2 (double targetDensity, double targetSpacing, double relativeKernelRadius)

	SPHSolver2 (const SPHSolver2 &)=delete
	Deleted copy constructor.

	SPHSolver2 (SPHSolver2 &&) noexcept=delete
	Deleted move constructor.

	~SPHSolver2 () override=default
	Default virtual destructor.

SPHSolver2 &	operator= (const SPHSolver2 &)=delete
	Deleted copy assignment operator.

SPHSolver2 &	operator= (SPHSolver2 &&) noexcept=delete
	Deleted move assignment operator.

double	GetEosExponent () const
	Returns the exponent part of the equation-of-state.

void	SetEosExponent (double newEosExponent)
	Sets the exponent part of the equation-of-state.

double	GetNegativePressureScale () const
	Returns the negative pressure scale.

void	SetNegativePressureScale (double newNegativePressureScale)
	Sets the negative pressure scale.

double	GetViscosityCoefficient () const
	Returns the viscosity coefficient.

void	SetViscosityCoefficient (double newViscosityCoefficient)
	Sets the viscosity coefficient.

double	GetPseudoViscosityCoefficient () const
	Returns the pseudo viscosity coefficient.

void	SetPseudoViscosityCoefficient (double newPseudoViscosityCoefficient)
	Sets the pseudo viscosity coefficient.

double	GetSpeedOfSound () const
	Returns the speed of sound.

void	SetSpeedOfSound (double newSpeedOfSound)
	Sets the speed of sound.

double	GetTimeStepLimitScale () const
	Multiplier that scales the max allowed time-step.

void	SetTimeStepLimitScale (double newScale)
	Sets the multiplier that scales the max allowed time-step.

SPHSystemData2Ptr	GetSPHSystemData () const
	Returns the SPH system data.

Public Member Functions inherited from CubbyFlow::ParticleSystemSolver2
	ParticleSystemSolver2 ()
	Constructs an empty solver.

	ParticleSystemSolver2 (double radius, double mass)
	Constructs a solver with particle parameters.

	ParticleSystemSolver2 (const ParticleSystemSolver2 &)=delete
	Deleted copy constructor.

	ParticleSystemSolver2 (ParticleSystemSolver2 &&) noexcept=delete
	Deleted move constructor.

	~ParticleSystemSolver2 () override=default
	Default virtual destructor.

ParticleSystemSolver2 &	operator= (const ParticleSystemSolver2 &)=delete
	Deleted copy assignment operator.

ParticleSystemSolver2 &	operator= (ParticleSystemSolver2 &&) noexcept=delete
	Deleted move assignment operator.

double	GetDragCoefficient () const
	Returns the drag coefficient.

void	SetDragCoefficient (double newDragCoefficient)
	Sets the drag coefficient.

double	GetRestitutionCoefficient () const
	Gets the restitution coefficient.

void	SetRestitutionCoefficient (double newRestitutionCoefficient)
	Sets the restitution coefficient.

const Vector2D &	GetGravity () const
	Returns the gravity.

void	SetGravity (const Vector2D &newGravity)
	Sets the gravity.

const ParticleSystemData2Ptr &	GetParticleSystemData () const
	Returns the particle system data.

const Collider2Ptr &	GetCollider () const
	Returns the collider.

void	SetCollider (const Collider2Ptr &newCollider)
	Sets the collider.

const ParticleEmitter2Ptr &	GetEmitter () const
	Returns the emitter.

void	SetEmitter (const ParticleEmitter2Ptr &newEmitter)
	Sets the emitter.

const VectorField2Ptr &	GetWind () const
	Returns the wind field.

void	SetWind (const VectorField2Ptr &newWind)
	Sets the wind.

Public Member Functions inherited from CubbyFlow::PhysicsAnimation
	PhysicsAnimation ()
	Default constructor.

	PhysicsAnimation (const PhysicsAnimation &)=default
	Default copy constructor.

	PhysicsAnimation (PhysicsAnimation &&) noexcept=default
	Default move constructor.

virtual	~PhysicsAnimation ()=default
	Default virtual destructor.

PhysicsAnimation &	operator= (const PhysicsAnimation &)=default
	Default copy assignment operator.

PhysicsAnimation &	operator= (PhysicsAnimation &&) noexcept=default
	Default move assignment operator.

bool	GetIsUsingFixedSubTimeSteps () const
	Returns true if fixed sub-timestepping is used.

void	SetIsUsingFixedSubTimeSteps (bool isUsing)
	Sets true if fixed sub-timestepping is used.

unsigned int	GetNumberOfFixedSubTimeSteps () const
	Returns the number of fixed sub-timesteps.

void	SetNumberOfFixedSubTimeSteps (unsigned int numberOfSteps)
	Sets the number of fixed sub-timesteps.

void	AdvanceSingleFrame ()
	Advances a single frame.

Frame	GetCurrentFrame () const
	Returns current frame.

void	SetCurrentFrame (const Frame &frame)
	Sets current frame cursor (but do not invoke update()).

double	GetCurrentTimeInSeconds () const
	Returns current time in seconds.

Public Member Functions inherited from CubbyFlow::Animation
	Animation ()=default
	Default constructor.

	Animation (const Animation &)=default
	Default copy constructor.

	Animation (Animation &&) noexcept=default
	Default move constructor.

virtual	~Animation ()=default
	Default virtual destructor.

Animation &	operator= (const Animation &)=default
	Default copy assignment operator.

Animation &	operator= (Animation &&) noexcept=default
	Default move assignment operator.

void	Update (const Frame &frame)
	Updates animation state for given `frame`.

Static Public Member Functions
static Builder	GetBuilder ()
	Returns builder fox SPHSolver2.

Static Public Member Functions inherited from CubbyFlow::ParticleSystemSolver2
static Builder	GetBuilder ()
	Returns builder fox ParticleSystemSolver2.

Protected Member Functions
unsigned int	GetNumberOfSubTimeSteps (double timeIntervalInSeconds) const override
	Returns the number of sub-time-steps.

void	AccumulateForces (double timeStepInSeconds) override
	Accumulates the force to the forces array in the particle system.

void	OnBeginAdvanceTimeStep (double timeStepInSeconds) override
	Performs pre-processing step before the simulation.

void	OnEndAdvanceTimeStep (double timeStepInSeconds) override
	Performs post-processing step before the simulation.

virtual void	AccumulateNonPressureForces (double timeStepInSeconds)

virtual void	AccumulatePressureForce (double timeStepInSeconds)

void	ComputePressure ()
	Computes the pressure.

void	AccumulatePressureForce (const ConstArrayView1< Vector2D > &positions, const ConstArrayView1< double > &densities, const ConstArrayView1< double > &pressures, ArrayView1< Vector2D > pressureForces)
	Accumulates the pressure force to the given `pressureForces` array.

void	AccumulateViscosityForce ()

void	ComputePseudoViscosity (double timeStepInSeconds)
	Computes pseudo viscosity.

Protected Member Functions inherited from CubbyFlow::ParticleSystemSolver2
void	OnInitialize () override
	Initializes the simulator.

void	OnAdvanceTimeStep (double timeStepInSeconds) override
	Called to advance a single time-step.

void	ResolveCollision ()
	Resolves any collisions occurred by the particles.

void	ResolveCollision (ArrayView1< Vector2D > newPositions, ArrayView1< Vector2D > newVelocities)

void	SetParticleSystemData (const ParticleSystemData2Ptr &newParticles)
	Assign a new particle system data.

Detailed Description

2-D SPH solver.

This class implements 2-D SPH solver. The main pressure solver is based on equation-of-state (EOS).

See also: M{"u}ller et al., Particle-based fluid simulation for interactive applications, SCA 2003.; M. Becker and M. Teschner, Weakly compressible SPH for free surface flows, SCA 2007.; Adams and Wicke, Meshless approximation methods and applications in physics based modeling and animation, Eurographics tutorials 2009.

Constructor & Destructor Documentation

◆ SPHSolver2() [1/4]

CubbyFlow::SPHSolver2::SPHSolver2 ( )

Constructs a solver with empty particle set.

◆ SPHSolver2() [2/4]

CubbyFlow::SPHSolver2::SPHSolver2	(	double	targetDensity,
		double	targetSpacing,
		double	relativeKernelRadius
	)

Constructs a solver with target density, spacing, and relative kernel radius.

◆ SPHSolver2() [3/4]

CubbyFlow::SPHSolver2::SPHSolver2 ( const SPHSolver2 & )

delete

Deleted copy constructor.

◆ SPHSolver2() [4/4]

CubbyFlow::SPHSolver2::SPHSolver2 ( SPHSolver2 && )

deletenoexcept

Deleted move constructor.

◆ ~SPHSolver2()

CubbyFlow::SPHSolver2::~SPHSolver2 ( )

overridedefault

Default virtual destructor.

Member Function Documentation

◆ AccumulateForces()

void CubbyFlow::SPHSolver2::AccumulateForces ( double timeStepInSeconds )

overrideprotectedvirtual

Accumulates the force to the forces array in the particle system.

Reimplemented from CubbyFlow::ParticleSystemSolver2.

◆ AccumulateNonPressureForces()

virtual void CubbyFlow::SPHSolver2::AccumulateNonPressureForces ( double timeStepInSeconds )

protectedvirtual

Accumulates the non-pressure forces to the forces array in the particle system.

◆ AccumulatePressureForce() [1/2]

void CubbyFlow::SPHSolver2::AccumulatePressureForce	(	const ConstArrayView1< Vector2D > &	positions,
		const ConstArrayView1< double > &	densities,
		const ConstArrayView1< double > &	pressures,
		ArrayView1< Vector2D >	pressureForces
	)

protected

Accumulates the pressure force to the given pressureForces array.

◆ AccumulatePressureForce() [2/2]

virtual void CubbyFlow::SPHSolver2::AccumulatePressureForce ( double timeStepInSeconds )

protectedvirtual

Accumulates the pressure force to the forces array in the particle system.

Reimplemented in CubbyFlow::PCISPHSolver2.

◆ AccumulateViscosityForce()

void CubbyFlow::SPHSolver2::AccumulateViscosityForce ( )

protected

Accumulates the viscosity force to the forces array in the particle system.

◆ ComputePressure()

void CubbyFlow::SPHSolver2::ComputePressure ( )

protected

Computes the pressure.

◆ ComputePseudoViscosity()

void CubbyFlow::SPHSolver2::ComputePseudoViscosity ( double timeStepInSeconds )

protected

Computes pseudo viscosity.

◆ GetBuilder()

static Builder CubbyFlow::SPHSolver2::GetBuilder ( )

static

Returns builder fox SPHSolver2.

◆ GetEosExponent()

double CubbyFlow::SPHSolver2::GetEosExponent ( ) const

Returns the exponent part of the equation-of-state.

◆ GetNegativePressureScale()

double CubbyFlow::SPHSolver2::GetNegativePressureScale ( ) const

Returns the negative pressure scale.

◆ GetNumberOfSubTimeSteps()

unsigned int CubbyFlow::SPHSolver2::GetNumberOfSubTimeSteps ( double timeIntervalInSeconds ) const

overrideprotectedvirtual

Returns the number of sub-time-steps.

Reimplemented from CubbyFlow::PhysicsAnimation.

◆ GetPseudoViscosityCoefficient()

double CubbyFlow::SPHSolver2::GetPseudoViscosityCoefficient ( ) const

Returns the pseudo viscosity coefficient.

◆ GetSpeedOfSound()

double CubbyFlow::SPHSolver2::GetSpeedOfSound ( ) const

Returns the speed of sound.

◆ GetSPHSystemData()

SPHSystemData2Ptr CubbyFlow::SPHSolver2::GetSPHSystemData ( ) const

Returns the SPH system data.

◆ GetTimeStepLimitScale()

double CubbyFlow::SPHSolver2::GetTimeStepLimitScale ( ) const

Multiplier that scales the max allowed time-step.

This function returns the multiplier that scales the max allowed time-step. When the scale is 1.0, the time-step is bounded by the speed of sound and max acceleration.

◆ GetViscosityCoefficient()

double CubbyFlow::SPHSolver2::GetViscosityCoefficient ( ) const

Returns the viscosity coefficient.

◆ OnBeginAdvanceTimeStep()

void CubbyFlow::SPHSolver2::OnBeginAdvanceTimeStep ( double timeStepInSeconds )

overrideprotectedvirtual

Performs pre-processing step before the simulation.

Reimplemented from CubbyFlow::ParticleSystemSolver2.

◆ OnEndAdvanceTimeStep()

void CubbyFlow::SPHSolver2::OnEndAdvanceTimeStep ( double timeStepInSeconds )

overrideprotectedvirtual

Performs post-processing step before the simulation.

Reimplemented from CubbyFlow::ParticleSystemSolver2.

◆ operator=() [1/2]

SPHSolver2 & CubbyFlow::SPHSolver2::operator= ( const SPHSolver2 & )

delete

Deleted copy assignment operator.

◆ operator=() [2/2]

SPHSolver2 & CubbyFlow::SPHSolver2::operator= ( SPHSolver2 && )

deletenoexcept

Deleted move assignment operator.

◆ SetEosExponent()

void CubbyFlow::SPHSolver2::SetEosExponent ( double newEosExponent )

Sets the exponent part of the equation-of-state.

This function sets the exponent part of the equation-of-state. The value must be greater than 1.0, and smaller inputs will be clamped. Default is 7.

◆ SetNegativePressureScale()

void CubbyFlow::SPHSolver2::SetNegativePressureScale ( double newNegativePressureScale )

Sets the negative pressure scale.

This function sets the negative pressure scale. By setting the number between 0 and 1, the solver will scale the effect of negative pressure which can prevent the clumping of the particles near the surface. Input value outside 0 and 1 will be clamped within the range. Default is 0.

◆ SetPseudoViscosityCoefficient()

void CubbyFlow::SPHSolver2::SetPseudoViscosityCoefficient ( double newPseudoViscosityCoefficient )

Sets the pseudo viscosity coefficient.

This function sets the pseudo viscosity coefficient which applies additional pseudo-physical damping to the system. Default is 10.

◆ SetSpeedOfSound()

void CubbyFlow::SPHSolver2::SetSpeedOfSound ( double newSpeedOfSound )

Sets the speed of sound.

This function sets the speed of sound which affects the stiffness of the EOS and the time-step size. Higher value will make EOS stiffer and the time-step smaller. The input value must be higher than 0.0.

◆ SetTimeStepLimitScale()

void CubbyFlow::SPHSolver2::SetTimeStepLimitScale ( double newScale )

Sets the multiplier that scales the max allowed time-step.

This function sets the multiplier that scales the max allowed time-step. When the scale is 1.0, the time-step is bounded by the speed of sound and max acceleration.

◆ SetViscosityCoefficient()

void CubbyFlow::SPHSolver2::SetViscosityCoefficient ( double newViscosityCoefficient )

Sets the viscosity coefficient.

The documentation for this class was generated from the following file:

Core/Solver/Particle/SPH/SPHSolver2.hpp

Classes

Public Member Functions

Static Public Member Functions

Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ SPHSolver2() [1/4]

◆ SPHSolver2() [2/4]

◆ SPHSolver2() [3/4]

◆ SPHSolver2() [4/4]

◆ ~SPHSolver2()

Member Function Documentation

◆ AccumulateForces()

◆ AccumulateNonPressureForces()

◆ AccumulatePressureForce() [1/2]

◆ AccumulatePressureForce() [2/2]

◆ AccumulateViscosityForce()

◆ ComputePressure()

◆ ComputePseudoViscosity()

◆ GetBuilder()

◆ GetEosExponent()

◆ GetNegativePressureScale()

◆ GetNumberOfSubTimeSteps()

◆ GetPseudoViscosityCoefficient()

◆ GetSpeedOfSound()

◆ GetSPHSystemData()

◆ GetTimeStepLimitScale()

◆ GetViscosityCoefficient()

◆ OnBeginAdvanceTimeStep()

◆ OnEndAdvanceTimeStep()

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ SetEosExponent()

◆ SetNegativePressureScale()

◆ SetPseudoViscosityCoefficient()

◆ SetSpeedOfSound()

◆ SetTimeStepLimitScale()

◆ SetViscosityCoefficient()