vtkStructuredGridLIC2D Class Reference

#include <vtkStructuredGridLIC2D.h>

Inheritance diagram for vtkStructuredGridLIC2D:

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Collaboration diagram for vtkStructuredGridLIC2D:

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List of all members.

Detailed Description

GPU implementation of a Line Integral Convolution, a technique for imaging vector fields.

The input on port 0 is an 2D vtkStructuredGrid. It needs a vector field on point data. Port 1 is a special port for customized noise input. It is an optional port. If not present, noise is generated by the filter. Even if none-power-of-two texture are supported, giving a power-of-two image may result in faster execution on the GPU.

Please refer to Forssell, L. K., “Visualizing flow over curvilinear grid surfaces using line integral convolution”, Visualization 94 Conference Proceedings, pages 240-247, IEEE Computer Society, 1994 for details of the algorithm.

Required OpenGL Extensions:: GL_ARB_texture_non_power_of_two GL_VERSION_2_0 GL_ARB_texture_float GL_ARB_draw_buffers GL_EXT_framebuffer_object GL_ARB_pixel_buffer_object

Definition at line 50 of file vtkStructuredGridLIC2D.h.


Public Types
typedef vtkStructuredGridAlgorithm	Superclass
Public Member Functions
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
void	PrintSelf (ostream &os, vtkIndent indent)
int	GetFBOSuccess ()
int	GetLICSuccess ()

int	SetContext (vtkRenderWindow *context)
vtkRenderWindow *	GetContext ()

virtual void	SetSteps (int)
virtual int	GetSteps ()

virtual void	SetStepSize (double)
virtual double	GetStepSize ()

virtual void	SetMagnification (int)
virtual int	GetMagnification ()

virtual int	GetOpenGLExtensionsSupported ()
Static Public Member Functions
static vtkStructuredGridLIC2D *	New ()
static int	IsTypeOf (const char *type)
static vtkStructuredGridLIC2D *	SafeDownCast (vtkObject *o)
Protected Member Functions
	vtkStructuredGridLIC2D ()
	~vtkStructuredGridLIC2D ()
virtual int	RequestInformation (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector)
int	RequestUpdateExtent (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector)
void	AllocateScalars (vtkStructuredGrid *sg)

virtual int	FillInputPortInformation (int port, vtkInformation *info)

virtual int	FillOutputPortInformation (int port, vtkInformation *info)

void	AllocateOutputData (vtkDataObject *output, int outputPort)

virtual int	RequestData (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector)
Protected Attributes
int	Steps
double	StepSize
int	Magnification
int	OpenGLExtensionsSupported
vtkWeakPointer< vtkRenderWindow >	Context
vtkImageNoiseSource *	NoiseSource
bool	OwnWindow
int	FBOSuccess
int	LICSuccess

Member Typedef Documentation

typedef vtkStructuredGridAlgorithm vtkStructuredGridLIC2D::Superclass

Reimplemented from vtkStructuredGridAlgorithm.

Definition at line 54 of file vtkStructuredGridLIC2D.h.

Constructor & Destructor Documentation

vtkStructuredGridLIC2D::vtkStructuredGridLIC2D ( ) [protected]

vtkStructuredGridLIC2D::~vtkStructuredGridLIC2D ( ) [protected]

Member Function Documentation

static vtkStructuredGridLIC2D* vtkStructuredGridLIC2D::New ( ) [static]

Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

Reimplemented from vtkStructuredGridAlgorithm.

virtual const char* vtkStructuredGridLIC2D::GetClassName ( ) [virtual]

Reimplemented from vtkStructuredGridAlgorithm.

static int vtkStructuredGridLIC2D::IsTypeOf ( const char * name ) [static]

Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkStructuredGridAlgorithm.

virtual int vtkStructuredGridLIC2D::IsA ( const char * name ) [virtual]

Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkStructuredGridAlgorithm.

static vtkStructuredGridLIC2D* vtkStructuredGridLIC2D::SafeDownCast ( vtkObject * o ) [static]

Reimplemented from vtkStructuredGridAlgorithm.

void vtkStructuredGridLIC2D::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)			`[virtual]`

Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkStructuredGridAlgorithm.

int vtkStructuredGridLIC2D::SetContext ( vtkRenderWindow * context )

Get/Set the context. Context must be a vtkOpenGLRenderWindow. This does not increase the reference count of the context to avoid reference loops. SetContext() may raise an error is the OpenGL context does not support the required OpenGL extensions. Return 0 upon failure and 1 upon success.

vtkRenderWindow* vtkStructuredGridLIC2D::GetContext ( )

Get/Set the context. Context must be a vtkOpenGLRenderWindow. This does not increase the reference count of the context to avoid reference loops. SetContext() may raise an error is the OpenGL context does not support the required OpenGL extensions. Return 0 upon failure and 1 upon success.

virtual void vtkStructuredGridLIC2D::SetSteps ( int ) [virtual]

Number of steps. Initial value is 1. class invariant: Steps>0. In term of visual quality, the greater the better.

virtual int vtkStructuredGridLIC2D::GetSteps ( ) [virtual]

Number of steps. Initial value is 1. class invariant: Steps>0. In term of visual quality, the greater the better.

virtual void vtkStructuredGridLIC2D::SetStepSize ( double ) [virtual]

Step size. WE ARE NOT SURE YET about the space where we define the step. If the image data has different spacing in each dimension, it is an issue. Initial value is 1.0. class invariant: StepSize>0.0. In term of visual quality, the smaller the better. The type for the interface is double as VTK interface is double but GPU only supports float. This value will be converted to float in the execution of the algorithm.

virtual double vtkStructuredGridLIC2D::GetStepSize ( ) [virtual]

Step size. WE ARE NOT SURE YET about the space where we define the step. If the image data has different spacing in each dimension, it is an issue. Initial value is 1.0. class invariant: StepSize>0.0. In term of visual quality, the smaller the better. The type for the interface is double as VTK interface is double but GPU only supports float. This value will be converted to float in the execution of the algorithm.

virtual void vtkStructuredGridLIC2D::SetMagnification ( int ) [virtual]

The the magnification factor. Default is 1

virtual int vtkStructuredGridLIC2D::GetMagnification ( ) [virtual]

The the magnification factor. Default is 1

virtual int vtkStructuredGridLIC2D::GetOpenGLExtensionsSupported ( ) [virtual]

Check if the required OpenGL extensions / GPU are supported.

int vtkStructuredGridLIC2D::GetFBOSuccess ( ) [inline]

Check if FBO is started properly.

Definition at line 98 of file vtkStructuredGridLIC2D.h.

int vtkStructuredGridLIC2D::GetLICSuccess ( ) [inline]

Check if LIC runs properly.

Definition at line 101 of file vtkStructuredGridLIC2D.h.

virtual int vtkStructuredGridLIC2D::FillInputPortInformation	(	int	port,
		vtkInformation *	info
	)			`[protected, virtual]`

Fill the input port information objects for this algorithm. This is invoked by the first call to GetInputPortInformation for each port so subclasses can specify what they can handle. Redefined from the superclass.

Reimplemented from vtkStructuredGridAlgorithm.

virtual int vtkStructuredGridLIC2D::FillOutputPortInformation	(	int	port,
		vtkInformation *	info
	)			`[protected, virtual]`

Fill the output port information objects for this algorithm. This is invoked by the first call to GetOutputPortInformation for each port so subclasses can specify what they can handle. Redefined from the superclass.

Reimplemented from vtkStructuredGridAlgorithm.

virtual int vtkStructuredGridLIC2D::RequestInformation	(	vtkInformation *	request,
		vtkInformationVector **	inputVector,
		vtkInformationVector *	outputVector
	)			`[protected, virtual]`

Reimplemented from vtkStructuredGridAlgorithm.

int vtkStructuredGridLIC2D::RequestUpdateExtent	(	vtkInformation *	,
		vtkInformationVector **	,
		vtkInformationVector *
	)			`[protected, virtual]`

This is called by the superclass. This is the method you should override.

Reimplemented from vtkStructuredGridAlgorithm.

void vtkStructuredGridLIC2D::AllocateOutputData	(	vtkDataObject *	output,
		int	outputPort
	)			`[protected]`

Stolen from vtkImageAlgorithm. Should be in vtkStructuredGridAlgorithm.

void vtkStructuredGridLIC2D::AllocateScalars ( vtkStructuredGrid * sg ) [protected]

Stolen from vtkImageData. Should be in vtkStructuredGrid.

virtual int vtkStructuredGridLIC2D::RequestData	(	vtkInformation *	request,
		vtkInformationVector **	inputVector,
		vtkInformationVector *	outputVector
	)			`[protected, virtual]`