performs piecewise linear ray integration. More...

#include <vtkUnstructuredGridPartialPreIntegration.h>

Inheritance diagram for vtkUnstructuredGridPartialPreIntegration:

Collaboration diagram for vtkUnstructuredGridPartialPreIntegration:

Public Types
typedef vtkUnstructuredGridVolumeRayIntegrator	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])
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 ()
Protected Types
enum	{ PSI_TABLE_SIZE = 512 }
Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const
	vtkUnstructuredGridPartialPreIntegration ()
	~vtkUnstructuredGridPartialPreIntegration ()
Protected Attributes
vtkVolumeProperty *	Property
vtkPartialPreIntegrationTransferFunction *	TransferFunctions
vtkTimeStamp	TransferFunctionsModified
int	NumIndependentComponents
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

Reimplemented from vtkUnstructuredGridVolumeRayIntegrator.

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 * 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 vtkUnstructuredGridVolumeRayIntegrator.

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]

Reimplemented from vtkUnstructuredGridVolumeRayIntegrator.

virtual vtkObjectBase* vtkUnstructuredGridPartialPreIntegration::NewInstanceInternal ( ) const [protected, virtual]

Reimplemented from vtkUnstructuredGridVolumeRayIntegrator.

vtkUnstructuredGridPartialPreIntegration* vtkUnstructuredGridPartialPreIntegration::NewInstance ( ) const

Reimplemented from vtkUnstructuredGridVolumeRayIntegrator.

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

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

Reimplemented from vtkObject.

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]
	)		`[inline, static]`

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]
	)		`[inline, static]`

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
	)		`[inline, 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.

Definition at line 115 of file vtkUnstructuredGridPartialPreIntegration.h.

float * vtkUnstructuredGridPartialPreIntegration::GetPsiTable ( int & size ) [inline, 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.

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.