2-D SPH solver. More...

#include <jet/sph_solver2.h>

Inheritance diagram for jet::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. More...

virtual	~SphSolver2 ()

	SphSolver2 (double targetDensity, double targetSpacing, double relativeKernelRadius)

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

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

double	negativePressureScale () const
	Returns the negative pressure scale. More...

void	setNegativePressureScale (double newNegativePressureScale)
	Sets the negative pressure scale. More...

double	viscosityCoefficient () const
	Returns the viscosity coefficient. More...

void	setViscosityCoefficient (double newViscosityCoefficient)
	Sets the viscosity coefficient. More...

double	pseudoViscosityCoefficient () const
	Returns the pseudo viscosity coefficient. More...

void	setPseudoViscosityCoefficient (double newPseudoViscosityCoefficient)
	Sets the pseudo viscosity coefficient. More...

double	speedOfSound () const
	Returns the speed of sound. More...

void	setSpeedOfSound (double newSpeedOfSound)
	Sets the speed of sound. More...

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

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

SphSystemData2Ptr	sphSystemData () const
	Returns the SPH system data. More...

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

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

virtual	~ParticleSystemSolver2 ()
	Destructor. More...

double	dragCoefficient () const
	Returns the drag coefficient. More...

void	setDragCoefficient (double newDragCoefficient)
	Sets the drag coefficient. More...

double	restitutionCoefficient () const
	Sets the restitution coefficient. More...

void	setRestitutionCoefficient (double newRestitutionCoefficient)
	Sets the restitution coefficient. More...

const Vector2D &	gravity () const
	Returns the gravity. More...

void	setGravity (const Vector2D &newGravity)
	Sets the gravity. More...

const ParticleSystemData2Ptr &	particleSystemData () const
	Returns the particle system data. More...

const Collider2Ptr &	collider () const
	Returns the collider. More...

void	setCollider (const Collider2Ptr &newCollider)
	Sets the collider. More...

const ParticleEmitter2Ptr &	emitter () const
	Returns the emitter. More...

void	setEmitter (const ParticleEmitter2Ptr &newEmitter)
	Sets the emitter. More...

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

void	setWind (const VectorField2Ptr &newWind)
	Sets the wind. More...

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

virtual	~PhysicsAnimation ()
	Destructor. More...

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

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

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

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

void	advanceSingleFrame ()
	Advances a single frame. More...

Frame	currentFrame () const
	Returns current frame. More...

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

double	currentTimeInSeconds () const
	Returns current time in seconds. More...

Public Member Functions inherited from jet::Animation
	Animation ()

virtual	~Animation ()

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

Static Public Member Functions
static Builder	builder ()
	Returns builder fox SphSolver2. More...

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

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

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

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

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

virtual void	accumulateNonPressureForces (double timeStepInSeconds)

virtual void	accumulatePressureForce (double timeStepInSeconds)

void	computePressure ()
	Computes the pressure. More...

void	accumulatePressureForce (const ConstArrayAccessor1< Vector2D > &positions, const ConstArrayAccessor1< double > &densities, const ConstArrayAccessor1< double > &pressures, ArrayAccessor1< Vector2D > pressureForces)
	Accumulates the pressure force to the given `pressureForces` array. More...

void	accumulateViscosityForce ()

void	computePseudoViscosity (double timeStepInSeconds)
	Computes pseudo viscosity. More...

Protected Member Functions inherited from jet::ParticleSystemSolver2
void	onInitialize () override
	Initializes the simulator. More...

void	onAdvanceTimeStep (double timeStepInSeconds) override
	Called to advane a single time-step. More...

void	resolveCollision ()
	Resolves any collisions occured by the particles. More...

void	resolveCollision (ArrayAccessor1< Vector2D > newPositions, ArrayAccessor1< Vector2D > newVelocities)

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

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() [1/2]

jet::SphSolver2::SphSolver2 ( )

Constructs a solver with empty particle set.

◆ ~SphSolver2()

virtual jet::SphSolver2::~SphSolver2 ( )

virtual

◆ SphSolver2() [2/2]

jet::SphSolver2::SphSolver2	(	double	targetDensity,
		double	targetSpacing,
		double	relativeKernelRadius
	)

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

Member Function Documentation

◆ accumulateForces()

void jet::SphSolver2::accumulateForces ( double timeStepInSeconds )

overrideprotectedvirtual

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

Reimplemented from jet::ParticleSystemSolver2.

◆ accumulateNonPressureForces()

virtual void jet::SphSolver2::accumulateNonPressureForces ( double timeStepInSeconds )

protectedvirtual

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

◆ accumulatePressureForce() [1/2]

void jet::SphSolver2::accumulatePressureForce	(	const ConstArrayAccessor1< Vector2D > &	positions,
		const ConstArrayAccessor1< double > &	densities,
		const ConstArrayAccessor1< double > &	pressures,
		ArrayAccessor1< Vector2D >	pressureForces
	)

protected

Accumulates the pressure force to the given pressureForces array.

◆ accumulatePressureForce() [2/2]

virtual void jet::SphSolver2::accumulatePressureForce ( double timeStepInSeconds )

protectedvirtual

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

Reimplemented in jet::PciSphSolver2.

◆ accumulateViscosityForce()

void jet::SphSolver2::accumulateViscosityForce ( )

protected

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

◆ builder()

static Builder jet::SphSolver2::builder ( )

static

Returns builder fox SphSolver2.

◆ computePressure()

void jet::SphSolver2::computePressure ( )

protected

Computes the pressure.

◆ computePseudoViscosity()

void jet::SphSolver2::computePseudoViscosity ( double timeStepInSeconds )

protected

Computes pseudo viscosity.

◆ eosExponent()

double jet::SphSolver2::eosExponent ( ) const

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

◆ negativePressureScale()

double jet::SphSolver2::negativePressureScale ( ) const

Returns the negative pressure scale.

◆ numberOfSubTimeSteps()

unsigned int jet::SphSolver2::numberOfSubTimeSteps ( double timeIntervalInSeconds ) const

overrideprotectedvirtual

Returns the number of sub-time-steps.

Reimplemented from jet::PhysicsAnimation.

◆ onBeginAdvanceTimeStep()

void jet::SphSolver2::onBeginAdvanceTimeStep ( double timeStepInSeconds )

overrideprotectedvirtual

Performs pre-processing step before the simulation.

Reimplemented from jet::ParticleSystemSolver2.

◆ onEndAdvanceTimeStep()

void jet::SphSolver2::onEndAdvanceTimeStep ( double timeStepInSeconds )

overrideprotectedvirtual

Performs post-processing step before the simulation.

Reimplemented from jet::ParticleSystemSolver2.

◆ pseudoViscosityCoefficient()

double jet::SphSolver2::pseudoViscosityCoefficient ( ) const

Returns the pseudo viscosity coefficient.

◆ setEosExponent()

void jet::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 jet::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 jet::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 jet::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 jet::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 jet::SphSolver2::setViscosityCoefficient ( double newViscosityCoefficient )

Sets the viscosity coefficient.

◆ speedOfSound()

double jet::SphSolver2::speedOfSound ( ) const

Returns the speed of sound.

◆ sphSystemData()

SphSystemData2Ptr jet::SphSolver2::sphSystemData ( ) const

Returns the SPH system data.

◆ timeStepLimitScale()

double jet::SphSolver2::timeStepLimitScale ( ) 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.

◆ viscosityCoefficient()

double jet::SphSolver2::viscosityCoefficient ( ) const

Returns the viscosity coefficient.

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

jet/sph_solver2.h

Classes

Public Member Functions

Static Public Member Functions

Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ SphSolver2() [1/2]

◆ ~SphSolver2()

◆ SphSolver2() [2/2]

Member Function Documentation

◆ accumulateForces()

◆ accumulateNonPressureForces()

◆ accumulatePressureForce() [1/2]

◆ accumulatePressureForce() [2/2]

◆ accumulateViscosityForce()

◆ builder()

◆ computePressure()

◆ computePseudoViscosity()

◆ eosExponent()

◆ negativePressureScale()

◆ numberOfSubTimeSteps()

◆ onBeginAdvanceTimeStep()

◆ onEndAdvanceTimeStep()

◆ pseudoViscosityCoefficient()

◆ setEosExponent()

◆ setNegativePressureScale()

◆ setPseudoViscosityCoefficient()

◆ setSpeedOfSound()

◆ setTimeStepLimitScale()

◆ setViscosityCoefficient()

◆ speedOfSound()

◆ sphSystemData()

◆ timeStepLimitScale()

◆ viscosityCoefficient()