performs piecewise linear ray integration. More...

#include <vtkUnstructuredGridPartialPreIntegration.h>

Inheritance diagram for vtkUnstructuredGridPartialPreIntegration:

Collaboration diagram for vtkUnstructuredGridPartialPreIntegration:

Public Types
typedef vtkUnstructuredGridVolumeRayIntegrator	Superclass

Public Types inherited from vtkUnstructuredGridVolumeRayIntegrator
typedef vtkObject	Superclass

Public Types inherited from vtkObject
typedef vtkObjectBase	Superclass

Public Member Functions
virtual int	IsA (const char *type)

vtkUnstructuredGridPartialPreIntegration *	NewInstance () const

virtual void	PrintSelf (ostream &os, vtkIndent indent)

virtual void	Initialize (vtkVolume volume, vtkDataArray scalars)

virtual void	Integrate (vtkDoubleArray intersectionLengths, vtkDataArray nearIntersections, vtkDataArray *farIntersections, float color[4])

Public Member Functions inherited from vtkUnstructuredGridVolumeRayIntegrator
vtkUnstructuredGridVolumeRayIntegrator *	NewInstance () const

Public Member Functions inherited from vtkObject
vtkObject *	NewInstance () const

virtual void	DebugOn ()

virtual void	DebugOff ()

bool	GetDebug ()

void	SetDebug (bool debugFlag)

virtual void	Modified ()

virtual unsigned long	GetMTime ()

unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)

unsigned long	AddObserver (const char event, vtkCommand , float priority=0.0f)

vtkCommand *	GetCommand (unsigned long tag)

void	RemoveObserver (vtkCommand *)

void	RemoveObservers (unsigned long event, vtkCommand *)

void	RemoveObservers (const char event, vtkCommand )

int	HasObserver (unsigned long event, vtkCommand *)

int	HasObserver (const char event, vtkCommand )

void	RemoveObserver (unsigned long tag)

void	RemoveObservers (unsigned long event)

void	RemoveObservers (const char *event)

void	RemoveAllObservers ()

int	HasObserver (unsigned long event)

int	HasObserver (const char *event)

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)

int	InvokeEvent (unsigned long event, void *callData)

int	InvokeEvent (const char event, void callData)

int	InvokeEvent (unsigned long event)

int	InvokeEvent (const char *event)

Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const

virtual void	Delete ()

virtual void	FastDelete ()

void	Print (ostream &os)

virtual void	Register (vtkObjectBase *o)

virtual void	UnRegister (vtkObjectBase *o)

void	SetReferenceCount (int)

void	PrintRevisions (ostream &)

virtual void	PrintHeader (ostream &os, vtkIndent indent)

virtual void	PrintTrailer (ostream &os, vtkIndent indent)

int	GetReferenceCount ()

Static Public Member Functions
static int	IsTypeOf (const char *type)

static vtkUnstructuredGridPartialPreIntegration *	SafeDownCast (vtkObjectBase *o)

static vtkUnstructuredGridPartialPreIntegration *	New ()


static void	IntegrateRay (double length, double intensity_front, double attenuation_front, double intensity_back, double attenuation_back, float color[4])

static void	IntegrateRay (double length, const double color_front[3], double attenuation_front, const double color_back[3], double attenuation_back, float color[4])


static float	Psi (float taufD, float taubD)

static float *	GetPsiTable (int &size)

static void	BuildPsiTable ()

Static Public Member Functions inherited from vtkUnstructuredGridVolumeRayIntegrator
static int	IsTypeOf (const char *type)

static vtkUnstructuredGridVolumeRayIntegrator *	SafeDownCast (vtkObjectBase *o)

Static Public Member Functions inherited from vtkObject
static int	IsTypeOf (const char *type)

static vtkObject *	SafeDownCast (vtkObjectBase *o)

static vtkObject *	New ()

static void	BreakOnError ()

static void	SetGlobalWarningDisplay (int val)

static void	GlobalWarningDisplayOn ()

static void	GlobalWarningDisplayOff ()

static int	GetGlobalWarningDisplay ()

Static Public Member Functions inherited from vtkObjectBase
static int	IsTypeOf (const char *name)

static vtkObjectBase *	New ()

Protected Types
enum	{ PSI_TABLE_SIZE = 512 }

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkUnstructuredGridPartialPreIntegration ()

	~vtkUnstructuredGridPartialPreIntegration ()

Protected Member Functions inherited from vtkUnstructuredGridVolumeRayIntegrator
	vtkUnstructuredGridVolumeRayIntegrator ()

	~vtkUnstructuredGridVolumeRayIntegrator ()

Protected Member Functions inherited from vtkObject
	vtkObject ()

virtual	~vtkObject ()

virtual void	RegisterInternal (vtkObjectBase *, int check)

virtual void	UnRegisterInternal (vtkObjectBase *, int check)

void	InternalGrabFocus (vtkCommand mouseEvents, vtkCommand keypressEvents=NULL)

void	InternalReleaseFocus ()

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	CollectRevisions (ostream &)

virtual void	ReportReferences (vtkGarbageCollector *)

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Protected Attributes
vtkVolumeProperty *	Property

vtkPartialPreIntegrationTransferFunction *	TransferFunctions

vtkTimeStamp	TransferFunctionsModified

int	NumIndependentComponents

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

Protected Attributes inherited from vtkObjectBase
vtkAtomicInt32	ReferenceCount

vtkWeakPointerBase **	WeakPointers

Static Protected Attributes
static float	PsiTable [PSI_TABLE_SIZE *PSI_TABLE_SIZE]

static int	PsiTableBuilt

Detailed Description

performs piecewise linear ray integration.

vtkUnstructuredGridPartialPreIntegration performs piecewise linear ray integration. This will give the same results as vtkUnstructuredGridLinearRayIntegration (with potentially a error due to table lookup quantization), but should be notably faster. The algorithm used is given by Moreland and Angel, "A Fast High Accuracy Volume Renderer for Unstructured Data."

This class is thread safe only after the first instance is created.

Tests:: vtkUnstructuredGridPartialPreIntegration (Tests)

Definition at line 54 of file vtkUnstructuredGridPartialPreIntegration.h.

Member Typedef Documentation

typedef vtkUnstructuredGridVolumeRayIntegrator vtkUnstructuredGridPartialPreIntegration::Superclass

Definition at line 58 of file vtkUnstructuredGridPartialPreIntegration.h.

Member Enumeration Documentation

anonymous enum

protected

Enumerator
PSI_TABLE_SIZE

Definition at line 105 of file vtkUnstructuredGridPartialPreIntegration.h.

Constructor & Destructor Documentation

vtkUnstructuredGridPartialPreIntegration::vtkUnstructuredGridPartialPreIntegration ( )

protected

vtkUnstructuredGridPartialPreIntegration::~vtkUnstructuredGridPartialPreIntegration ( )

protected

Member Function Documentation

static int vtkUnstructuredGridPartialPreIntegration::IsTypeOf ( const char * type )

static

virtual int vtkUnstructuredGridPartialPreIntegration::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 vtkUnstructuredGridVolumeRayIntegrator.

static vtkUnstructuredGridPartialPreIntegration* vtkUnstructuredGridPartialPreIntegration::SafeDownCast ( vtkObjectBase * o )

static

virtual vtkObjectBase* vtkUnstructuredGridPartialPreIntegration::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkUnstructuredGridVolumeRayIntegrator.

vtkUnstructuredGridPartialPreIntegration* vtkUnstructuredGridPartialPreIntegration::NewInstance ( ) const

static vtkUnstructuredGridPartialPreIntegration* vtkUnstructuredGridPartialPreIntegration::New ( )

static

virtual void vtkUnstructuredGridPartialPreIntegration::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 vtkUnstructuredGridVolumeRayIntegrator.

virtual void vtkUnstructuredGridPartialPreIntegration::Initialize	(	vtkVolume *	volume,
		vtkDataArray *	scalars
	)

virtual

Set up the integrator with the given properties and scalars.

Implements vtkUnstructuredGridVolumeRayIntegrator.

virtual void vtkUnstructuredGridPartialPreIntegration::Integrate	(	vtkDoubleArray *	intersectionLengths,
		vtkDataArray *	nearIntersections,
		vtkDataArray *	farIntersections,
		float	color[4]
	)

virtual

Given a set of intersections (defined by the three arrays), compute the peicewise integration of the array in front to back order. /c intersectionLengths holds the lengths of each peicewise segment. /c nearIntersections and /c farIntersections hold the scalar values at the front and back of each segment. /c color should contain the RGBA value of the volume in front of the segments passed in, and the result will be placed back into /c color.

Implements vtkUnstructuredGridVolumeRayIntegrator.

void vtkUnstructuredGridPartialPreIntegration::IntegrateRay	(	double	length,
		double	intensity_front,
		double	attenuation_front,
		double	intensity_back,
		double	attenuation_back,
		float	color[4]
	)

inlinestatic

Integrates a single ray segment. color is blended with the result (with color in front). The result is written back into color.

Definition at line 131 of file vtkUnstructuredGridPartialPreIntegration.h.

void vtkUnstructuredGridPartialPreIntegration::IntegrateRay	(	double	length,
		const double	color_front[3],
		double	attenuation_front,
		const double	color_back[3],
		double	attenuation_back,
		float	color[4]
	)

inlinestatic

Integrates a single ray segment. color is blended with the result (with color in front). The result is written back into color.

Definition at line 154 of file vtkUnstructuredGridPartialPreIntegration.h.

float vtkUnstructuredGridPartialPreIntegration::Psi	(	float	taufD,
		float	taubD
	)

inlinestatic

Looks up Psi (as defined by Moreland and Angel, "A Fast High Accuracy Volume Renderer for Unstructured Data") in a table. The table must be created first, which happens on the first instantiation of this class or when BuildPsiTable is first called.

Definition at line 115 of file vtkUnstructuredGridPartialPreIntegration.h.

float * vtkUnstructuredGridPartialPreIntegration::GetPsiTable ( int & size )

inlinestatic

Looks up Psi (as defined by Moreland and Angel, "A Fast High Accuracy Volume Renderer for Unstructured Data") in a table. The table must be created first, which happens on the first instantiation of this class or when BuildPsiTable is first called.

Definition at line 125 of file vtkUnstructuredGridPartialPreIntegration.h.

static void vtkUnstructuredGridPartialPreIntegration::BuildPsiTable ( )

static

Looks up Psi (as defined by Moreland and Angel, "A Fast High Accuracy Volume Renderer for Unstructured Data") in a table. The table must be created first, which happens on the first instantiation of this class or when BuildPsiTable is first called.