vtkUnstructuredGridPartialPreIntegration Class Reference

#include <vtkUnstructuredGridPartialPreIntegration.h>

Inheritance diagram for vtkUnstructuredGridPartialPreIntegration:

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Collaboration diagram for vtkUnstructuredGridPartialPreIntegration:

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List of all members.


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 53 of file vtkUnstructuredGridPartialPreIntegration.h.


Public Types

typedef
vtkUnstructuredGridVolumeRayIntegrator 
Superclass

Public Member Functions

virtual const char * GetClassName ()
virtual int IsA (const char *type)
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 (vtkObject *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

 vtkUnstructuredGridPartialPreIntegration ()
 ~vtkUnstructuredGridPartialPreIntegration ()

Protected Attributes

vtkVolumePropertyProperty
vtkPartialPreIntegrationTransferFunction * TransferFunctions
vtkTimeStamp TransferFunctionsModified
int NumIndependentComponents

Static Protected Attributes

static float PsiTable [PSI_TABLE_SIZE *PSI_TABLE_SIZE]
static int PsiTableBuilt

Member Typedef Documentation


Member Enumeration Documentation

anonymous enum [protected]

Enumerator:
PSI_TABLE_SIZE 

Definition at line 104 of file vtkUnstructuredGridPartialPreIntegration.h.


Constructor & Destructor Documentation

vtkUnstructuredGridPartialPreIntegration::vtkUnstructuredGridPartialPreIntegration (  )  [protected]

vtkUnstructuredGridPartialPreIntegration::~vtkUnstructuredGridPartialPreIntegration (  )  [protected]


Member Function Documentation

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

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 ( vtkObject o  )  [static]

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 130 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 153 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 114 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 124 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.


Member Data Documentation

Definition at line 97 of file vtkUnstructuredGridPartialPreIntegration.h.

vtkPartialPreIntegrationTransferFunction* vtkUnstructuredGridPartialPreIntegration::TransferFunctions [protected]

Definition at line 99 of file vtkUnstructuredGridPartialPreIntegration.h.

Definition at line 100 of file vtkUnstructuredGridPartialPreIntegration.h.

Definition at line 101 of file vtkUnstructuredGridPartialPreIntegration.h.

float vtkUnstructuredGridPartialPreIntegration::PsiTable[PSI_TABLE_SIZE *PSI_TABLE_SIZE] [static, protected]

Definition at line 106 of file vtkUnstructuredGridPartialPreIntegration.h.

Definition at line 107 of file vtkUnstructuredGridPartialPreIntegration.h.


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

Generated on Mon Sep 27 18:58:37 2010 for VTK by  doxygen 1.5.6