CubbyFlow::GridSmokeSolver2 Class Reference

2-D grid-based smoke solver. More...

#include <Core/Solver/Grid/GridSmokeSolver2.h>

Inheritance diagram for CubbyFlow::GridSmokeSolver2:

Classes
class	Builder
	Front-end to create GridSmokeSolver2 objects step by step. More...

Public Member Functions
	GridSmokeSolver2 ()
	Default constructor. More...
	GridSmokeSolver2 (const Size2 &resolution, const Vector2D &gridSpacing, const Vector2D &gridOrigin)
	Constructs solver with initial grid size. More...
virtual	~GridSmokeSolver2 ()
	Destructor. More...
double	GetSmokeDiffusionCoefficient () const
	Returns smoke diffusion coefficient. More...
void	SetSmokeDiffusionCoefficient (double newValue)
	Sets smoke diffusion coefficient. More...
double	GetTemperatureDiffusionCoefficient () const
	Returns temperature diffusion coefficient. More...
void	SetTemperatureDiffusionCoefficient (double newValue)
	Sets temperature diffusion coefficient. More...
double	GetBuoyancySmokeDensityFactor () const
	Returns the buoyancy factor which will be multiplied to the smoke density. More...
void	SetBuoyancySmokeDensityFactor (double newValue)
	Sets the buoyancy factor which will be multiplied to the smoke density. More...
double	GetBuoyancyTemperatureFactor () const
	Returns the buoyancy factor which will be multiplied to the temperature. More...
void	SetBuoyancyTemperatureFactor (double newValue)
	Sets the buoyancy factor which will be multiplied to the temperature. More...
double	GetSmokeDecayFactor () const
	Returns smoke decay factor. More...
void	SetSmokeDecayFactor (double newValue)
	Sets the smoke decay factor. More...
double	GetTemperatureDecayFactor () const
	Returns temperature decay factor. More...
void	SetTemperatureDecayFactor (double newValue)
	Sets the temperature decay factor. More...
ScalarGrid2Ptr	GetSmokeDensity () const
	Returns smoke density field. More...
ScalarGrid2Ptr	GetTemperature () const
	Returns temperature field. More...
Public Member Functions inherited from CubbyFlow::GridFluidSolver2
	GridFluidSolver2 ()
	Default constructor. More...
	GridFluidSolver2 (const Size2 &resolution, const Vector2D &gridSpacing, const Vector2D &gridOrigin)
	Constructs solver with initial grid size. More...
virtual	~GridFluidSolver2 ()
	Default destructor. More...
const Vector2D &	GetGravity () const
	Returns the gravity vector of the system. More...
void	SetGravity (const Vector2D &newGravity)
	Sets the gravity of the system. More...
double	GetViscosityCoefficient () const
	Returns the viscosity coefficient. More...
void	SetViscosityCoefficient (double newValue)
	Sets the viscosity coefficient. More...
double	GetCFL (double timeIntervalInSeconds) const
	Returns the CFL number from the current velocity field for given time interval. More...
double	GetMaxCFL () const
	Returns the max allowed CFL number. More...
void	SetMaxCFL (double newCFL)
	Sets the max allowed CFL number. More...
bool	GetUseCompressedLinearSystem () const
	Returns true if the solver is using compressed linear system. More...
void	SetUseCompressedLinearSystem (bool onoff)
	Sets whether the solver should use compressed linear system. More...
const AdvectionSolver2Ptr &	GetAdvectionSolver () const
	Returns the advection solver instance. More...
void	SetAdvectionSolver (const AdvectionSolver2Ptr &newSolver)
	Sets the advection solver. More...
const GridDiffusionSolver2Ptr &	GetDiffusionSolver () const
	Returns the diffusion solver instance. More...
void	SetDiffusionSolver (const GridDiffusionSolver2Ptr &newSolver)
	Sets the diffusion solver. More...
const GridPressureSolver2Ptr &	GetPressureSolver () const
	Returns the pressure solver instance. More...
void	SetPressureSolver (const GridPressureSolver2Ptr &newSolver)
	Sets the pressure solver. More...
int	GetClosedDomainBoundaryFlag () const
	Returns the closed domain boundary flag. More...
void	SetClosedDomainBoundaryFlag (int flag)
	Sets the closed domain boundary flag. More...
const GridSystemData2Ptr &	GetGridSystemData () const
	Returns the grid system data. More...
void	ResizeGrid (const Size2 &newSize, const Vector2D &newGridSpacing, const Vector2D &newGridOrigin) const
	Resizes grid system data. More...
Size2	GetResolution () const
	Returns the resolution of the grid system data. More...
Vector2D	GetGridSpacing () const
	Returns the grid spacing of the grid system data. More...
Vector2D	GetGridOrigin () const
	Returns the origin of the grid system data. More...
const FaceCenteredGrid2Ptr &	GetVelocity () const
	Returns the velocity field. More...
const Collider2Ptr &	GetCollider () const
	Returns the collider. More...
void	SetCollider (const Collider2Ptr &newCollider)
	Sets the collider. More...
const GridEmitter2Ptr &	GetEmitter () const
	Returns the emitter. More...
void	SetEmitter (const GridEmitter2Ptr &newEmitter)
	Sets the emitter. More...
Public Member Functions inherited from CubbyFlow::PhysicsAnimation
	PhysicsAnimation ()
	Default constructor. More...
virtual	~PhysicsAnimation ()
	Destructor. More...
bool	GetIsUsingFixedSubTimeSteps () 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	GetNumberOfFixedSubTimeSteps () 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	GetCurrentFrame () const
	Returns current frame. More...
void	SetCurrentFrame (const Frame &frame)
	Sets current frame cursor (but do not invoke update()). More...
double	GetCurrentTimeInSeconds () const
	Returns current time in seconds. More...
Public Member Functions inherited from CubbyFlow::Animation
	Animation ()
virtual	~Animation ()
void	Update (const Frame &frame)
	Updates animation state for given frame. More...

Static Public Member Functions
static Builder	GetBuilder ()
	Returns builder fox GridSmokeSolver2. More...
Static Public Member Functions inherited from CubbyFlow::GridFluidSolver2
static Builder	GetBuilder ()
	Returns builder fox GridFluidSolver2. More...

Protected Member Functions
void	OnEndAdvanceTimeStep (double timeIntervalInSeconds) override
	Called at the end of a time-step. More...
void	ComputeExternalForces (double timeIntervalInSeconds) override
	Computes the external force terms. More...
Protected Member Functions inherited from CubbyFlow::GridFluidSolver2
void	OnInitialize () override
	Called when it needs to setup initial condition. More...
void	OnAdvanceTimeStep (double timeIntervalInSeconds) override
	Called when advancing a single time-step. More...
unsigned int	GetNumberOfSubTimeSteps (double timeIntervalInSeconds) const override
	Returns the required sub-time-steps for given time interval. More...
virtual void	OnBeginAdvanceTimeStep (double timeIntervalInSeconds)
	Called at the beginning of a time-step. More...
virtual void	ComputeViscosity (double timeIntervalInSeconds)
	Computes the viscosity term using the diffusion solver. More...
virtual void	ComputePressure (double timeIntervalInSeconds)
	Computes the pressure term using the pressure solver. More...
virtual void	ComputeAdvection (double timeIntervalInSeconds)
	Computes the advection term using the advection solver. More...
virtual ScalarField2Ptr	GetFluidSDF () const
	Returns the signed-distance representation of the fluid. More...
void	ComputeGravity (double timeIntervalInSeconds)
	Computes the gravity term. More...
void	ApplyBoundaryCondition () const
	Applies the boundary condition to the velocity field. More...
void	ExtrapolateIntoCollider (ScalarGrid2 *grid)
	Extrapolates given field into the collider-occupied region. More...
void	ExtrapolateIntoCollider (CollocatedVectorGrid2 *grid)
	Extrapolates given field into the collider-occupied region. More...
void	ExtrapolateIntoCollider (FaceCenteredGrid2 *grid)
	Extrapolates given field into the collider-occupied region. More...
ScalarField2Ptr	GetColliderSDF () const
	Returns the signed-distance field representation of the collider. More...
VectorField2Ptr	GetColliderVelocityField () const
	Returns the velocity field of the collider. More...

Detailed Description

2-D grid-based smoke solver.

This class extends GridFluidSolver2 to implement smoke simulation solver. It adds smoke density and temperature fields to define the smoke and uses buoyancy force to simulate hot rising smoke.

See also

Fedkiw, Ronald, Jos Stam, and Henrik Wann Jensen. "Visual simulation of smoke." Proceedings of the 28th annual conference on Computer graphics and interactive techniques. ACM, 2001.

Constructor & Destructor Documentation

GridSmokeSolver2() [1/2]

CubbyFlow::GridSmokeSolver2::GridSmokeSolver2

(

)

Default constructor.

GridSmokeSolver2() [2/2]

CubbyFlow::GridSmokeSolver2::GridSmokeSolver2	(	const Size2 &	resolution,
		const Vector2D &	gridSpacing,
		const Vector2D &	gridOrigin
	)

Constructs solver with initial grid size.

~GridSmokeSolver2()

virtual CubbyFlow::GridSmokeSolver2::~GridSmokeSolver2 ( )

virtual

Destructor.

Member Function Documentation

ComputeExternalForces()

void CubbyFlow::GridSmokeSolver2::ComputeExternalForces ( double  timeIntervalInSeconds )

overrideprotectedvirtual

Computes the external force terms.

This function computes the external force applied for given time interval. By default, it only computes the gravity.

See also

GridFluidSolver2::ComputeGravity

Reimplemented from CubbyFlow::GridFluidSolver2.

GetBuilder()

static Builder CubbyFlow::GridSmokeSolver2::GetBuilder ( )

static

Returns builder fox GridSmokeSolver2.

GetBuoyancySmokeDensityFactor()

double CubbyFlow::GridSmokeSolver2::GetBuoyancySmokeDensityFactor

(

)

const

Returns the buoyancy factor which will be multiplied to the smoke density.

This class computes buoyancy by looking up the value of smoke density and temperature, compare them to the average values, and apply multiplier factor to the diff between the value and the average. That multiplier is defined for each smoke density and temperature separately. For example, negative smoke density buoyancy factor means a heavier smoke should sink.

Returns

The buoyancy factor for the smoke density.

GetBuoyancyTemperatureFactor()

double CubbyFlow::GridSmokeSolver2::GetBuoyancyTemperatureFactor

(

)

const

Returns the buoyancy factor which will be multiplied to the temperature.

This class computes buoyancy by looking up the value of smoke density and temperature, compare them to the average values, and apply multiplier factor to the diff between the value and the average. That multiplier is defined for each smoke density and temperature separately. For example, negative smoke density buoyancy factor means a heavier smoke should sink.

Returns

The buoyancy factor for the temperature.

GetSmokeDecayFactor()

double CubbyFlow::GridSmokeSolver2::GetSmokeDecayFactor

(

)

const

Returns smoke decay factor.

In addition to the diffusion, the smoke also can fade-out over time by setting the decay factor between 0 and 1.

Returns

The decay factor for smoke density.

GetSmokeDensity()

ScalarGrid2Ptr CubbyFlow::GridSmokeSolver2::GetSmokeDensity

(

)

const

Returns smoke density field.

GetSmokeDiffusionCoefficient()

double CubbyFlow::GridSmokeSolver2::GetSmokeDiffusionCoefficient

(

)

const

Returns smoke diffusion coefficient.

GetTemperature()

ScalarGrid2Ptr CubbyFlow::GridSmokeSolver2::GetTemperature

(

)

const

Returns temperature field.

GetTemperatureDecayFactor()

double CubbyFlow::GridSmokeSolver2::GetTemperatureDecayFactor

(

)

const

Returns temperature decay factor.

In addition to the diffusion, the smoke also can fade-out over time by setting the decay factor between 0 and 1.

Returns

The decay factor for smoke temperature.

GetTemperatureDiffusionCoefficient()

double CubbyFlow::GridSmokeSolver2::GetTemperatureDiffusionCoefficient

(

)

const

Returns temperature diffusion coefficient.

OnEndAdvanceTimeStep()

void CubbyFlow::GridSmokeSolver2::OnEndAdvanceTimeStep ( double  timeIntervalInSeconds )

overrideprotectedvirtual

Called at the end of a time-step.

Reimplemented from CubbyFlow::GridFluidSolver2.

SetBuoyancySmokeDensityFactor()

void CubbyFlow::GridSmokeSolver2::SetBuoyancySmokeDensityFactor

(

double

newValue

)

Sets the buoyancy factor which will be multiplied to the smoke density.

This class computes buoyancy by looking up the value of smoke density and temperature, compare them to the average values, and apply multiplier factor to the diff between the value and the average. That multiplier is defined for each smoke density and temperature separately. For example, negative smoke density buoyancy factor means a heavier smoke should sink.

Parameters

newValue

The new buoyancy factor for smoke density.

SetBuoyancyTemperatureFactor()

void CubbyFlow::GridSmokeSolver2::SetBuoyancyTemperatureFactor

(

double

newValue

)

Sets the buoyancy factor which will be multiplied to the temperature.

This class computes buoyancy by looking up the value of smoke density and temperature, compare them to the average values, and apply multiplier factor to the diff between the value and the average. That multiplier is defined for each smoke density and temperature separately. For example, negative smoke density buoyancy factor means a heavier smoke should sink.

Parameters

newValue

The new buoyancy factor for temperature.

SetSmokeDecayFactor()

void CubbyFlow::GridSmokeSolver2::SetSmokeDecayFactor

(

double

newValue

)

Sets the smoke decay factor.

In addition to the diffusion, the smoke also can fade-out over time by setting the decay factor between 0 and 1.

Parameters

[in]

newValue

The new decay factor.

SetSmokeDiffusionCoefficient()

void CubbyFlow::GridSmokeSolver2::SetSmokeDiffusionCoefficient

(

double

newValue

)

Sets smoke diffusion coefficient.

SetTemperatureDecayFactor()

void CubbyFlow::GridSmokeSolver2::SetTemperatureDecayFactor

(

double

newValue

)

Sets the temperature decay factor.

In addition to the diffusion, the temperature also can fade-out over time by setting the decay factor between 0 and 1.

Parameters

[in]

newValue

The new decay factor.

SetTemperatureDiffusionCoefficient()

void CubbyFlow::GridSmokeSolver2::SetTemperatureDiffusionCoefficient

(

double

newValue

)

Sets temperature diffusion coefficient.

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

• Core/Solver/Grid/GridSmokeSolver2.h