CubbyFlow::PhysicsAnimation Class Reference

Abstract base class for physics-based animation. More...

#include <Core/Animation/PhysicsAnimation.h>

Inheritance diagram for CubbyFlow::PhysicsAnimation:

Public Member Functions
	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...

Protected Member Functions
virtual void	OnAdvanceTimeStep (double timeIntervalInSeconds)=0
	Called when a single time-step should be advanced. More...
virtual unsigned int	GetNumberOfSubTimeSteps (double timeIntervalInSeconds) const
	Returns the required number of sub-timesteps for given time interval. More...
virtual void	OnInitialize ()
	Called at frame 0 to initialize the physics state. More...

Detailed Description

Abstract base class for physics-based animation.

This class represents physics-based animation by adding time-integration specific functions to Animation class.

Constructor & Destructor Documentation

PhysicsAnimation()

CubbyFlow::PhysicsAnimation::PhysicsAnimation

(

)

Default constructor.

~PhysicsAnimation()

virtual CubbyFlow::PhysicsAnimation::~PhysicsAnimation ( )

virtual

Destructor.

Member Function Documentation

AdvanceSingleFrame()

void CubbyFlow::PhysicsAnimation::AdvanceSingleFrame

(

)

Advances a single frame.

GetCurrentFrame()

Frame CubbyFlow::PhysicsAnimation::GetCurrentFrame

(

)

const

Returns current frame.

GetCurrentTimeInSeconds()

double CubbyFlow::PhysicsAnimation::GetCurrentTimeInSeconds

(

)

const

Returns current time in seconds.

This function returns the current time which is calculated by adding current frame + sub-timesteps it passed.

GetIsUsingFixedSubTimeSteps()

bool CubbyFlow::PhysicsAnimation::GetIsUsingFixedSubTimeSteps

(

)

const

Returns true if fixed sub-timestepping is used.

When performing a time-integration, it is often required to take sub-timestepping for better results. The sub-stepping can be either fixed rate or adaptive, and this function returns which feature is currently selected.

Returns

True if using fixed sub time steps, false otherwise.

GetNumberOfFixedSubTimeSteps()

unsigned int CubbyFlow::PhysicsAnimation::GetNumberOfFixedSubTimeSteps

(

)

const

Returns the number of fixed sub-timesteps.

When performing a time-integration, it is often required to take sub-timestepping for better results. The sub-stepping can be either fixed rate or adaptive, and this function returns the number of fixed sub-steps.

Returns

The number of fixed sub-timesteps.

GetNumberOfSubTimeSteps()

virtual unsigned int CubbyFlow::PhysicsAnimation::GetNumberOfSubTimeSteps ( double  timeIntervalInSeconds ) const

protectedvirtual

Returns the required number of sub-timesteps for given time interval.

The required number of sub-timestep can be different depending on the physics model behind the implementation. Override this function to implement own logic for model specific sub-timestepping for given time interval.

Parameters

[in]

timeIntervalInSeconds

The time interval in seconds.

Returns

The required number of sub-timesteps.

Reimplemented in CubbyFlow::GridFluidSolver2, CubbyFlow::GridFluidSolver3, CubbyFlow::SPHSolver2, and CubbyFlow::SPHSolver3.

OnAdvanceTimeStep()

virtual void CubbyFlow::PhysicsAnimation::OnAdvanceTimeStep ( double  timeIntervalInSeconds )

protectedpure virtual

Called when a single time-step should be advanced.

When Animation::update function is called, this class will internally subdivide a frame into sub-steps if needed. Each sub-step, or time-step, is then taken to move forward in time. This function is called for each time-step, and a subclass that inherits PhysicsAnimation class should implement this function for its own physics model.

Parameters

[in]

timeIntervalInSeconds

The time interval in seconds

Implemented in CubbyFlow::GridFluidSolver2, CubbyFlow::GridFluidSolver3, CubbyFlow::ParticleSystemSolver2, and CubbyFlow::ParticleSystemSolver3.

OnInitialize()

virtual void CubbyFlow::PhysicsAnimation::OnInitialize ( )

protectedvirtual

Called at frame 0 to initialize the physics state.

Inheriting classes can override this function to setup initial condition for the simulation.

Reimplemented in CubbyFlow::GridFluidSolver2, CubbyFlow::GridFluidSolver3, CubbyFlow::ParticleSystemSolver2, CubbyFlow::ParticleSystemSolver3, CubbyFlow::PICSolver3, and CubbyFlow::PICSolver2.

SetCurrentFrame()

void CubbyFlow::PhysicsAnimation::SetCurrentFrame

(

const Frame &

frame

)

Sets current frame cursor (but do not invoke update()).

SetIsUsingFixedSubTimeSteps()

void CubbyFlow::PhysicsAnimation::SetIsUsingFixedSubTimeSteps

(

bool

isUsing

)

Sets true if fixed sub-timestepping is used.

When performing a time-integration, it is often required to take sub-timestepping for better results. The sub-stepping can be either fixed rate or adaptive, and this function sets which feature should be selected.

Parameters

[in]

isUsing

True to enable fixed sub-stepping.

SetNumberOfFixedSubTimeSteps()

void CubbyFlow::PhysicsAnimation::SetNumberOfFixedSubTimeSteps

(

unsigned int

numberOfSteps

)

Sets the number of fixed sub-timesteps.

When performing a time-integration, it is often required to take sub-timestepping for better results. The sub-stepping can be either fixed rate or adaptive, and this function sets the number of fixed sub-steps.

Parameters

[in]

numberOfSteps

The number of fixed sub-timesteps.

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

• Core/Animation/PhysicsAnimation.h