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vtkUnstructuredGridPartialPreIntegration Class Reference

#include <vtkUnstructuredGridPartialPreIntegration.h>

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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.

Created by:
  • Moreland, Kenneth
CVS contributions (if > 5%):
  • Moreland, Kenneth (97%)
CVS logs (CVSweb):
  • .h (/Rendering/vtkUnstructuredGridPartialPreIntegration.h)
  • .cxx (/Rendering/vtkUnstructuredGridPartialPreIntegration.cxx)
Tests:
vtkUnstructuredGridPartialPreIntegration (Tests)

Definition at line 62 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 (vtkVolumeProperty *property, vtkDataArray *scalars)
virtual void Integrate (vtkDoubleArray *intersectionLengths, vtkDataArray *nearIntersections, vtkDataArray *farIntersections, float color[4])

Static Public Member Functions

int IsTypeOf (const char *type)
vtkUnstructuredGridPartialPreIntegrationSafeDownCast (vtkObject *o)
vtkUnstructuredGridPartialPreIntegrationNew ()
float Psi (float taufD, float taubD)
void BuildPsiTable ()
void IntegrateRay (double length, double intensity_front, double attenuation_front, double intensity_back, double attenuation_back, float color[4])
void IntegrateRay (double length, const double color_front[3], double attenuation_front, const double color_back[3], double attenuation_back, float color[4])

Protected Types

enum  { PSI_TABLE_SIZE = 512 }

Protected Member Functions

 vtkUnstructuredGridPartialPreIntegration ()
 ~vtkUnstructuredGridPartialPreIntegration ()

Protected Attributes

vtkVolumePropertyProperty
vtkPartialPreIntegrationTransferFunction * TransferFunctions
vtkTimeStamp TransferFunctionsModified
int NumIndependentComponents

Static Protected Attributes

float PsiTable [PSI_TABLE_SIZE *PSI_TABLE_SIZE]


Member Typedef Documentation

typedef vtkUnstructuredGridVolumeRayIntegrator vtkUnstructuredGridPartialPreIntegration::Superclass
 

Reimplemented from vtkUnstructuredGridVolumeRayIntegrator.

Definition at line 66 of file vtkUnstructuredGridPartialPreIntegration.h.


Member Enumeration Documentation

anonymous enum [protected]
 

Enumeration values:
PSI_TABLE_SIZE 

Definition at line 111 of file vtkUnstructuredGridPartialPreIntegration.h.


Constructor & Destructor Documentation

vtkUnstructuredGridPartialPreIntegration::vtkUnstructuredGridPartialPreIntegration  )  [protected]
 

vtkUnstructuredGridPartialPreIntegration::~vtkUnstructuredGridPartialPreIntegration  )  [protected]
 


Member Function Documentation

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

Reimplemented from vtkUnstructuredGridVolumeRayIntegrator.

int vtkUnstructuredGridPartialPreIntegration::IsTypeOf const char *  type  )  [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 vtkTypeRevisionMacro found in vtkSetGet.h.

Reimplemented from vtkUnstructuredGridVolumeRayIntegrator.

virtual int vtkUnstructuredGridPartialPreIntegration::IsA const char *  type  )  [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 vtkTypeRevisionMacro found in vtkSetGet.h.

Reimplemented from vtkUnstructuredGridVolumeRayIntegrator.

vtkUnstructuredGridPartialPreIntegration* vtkUnstructuredGridPartialPreIntegration::SafeDownCast vtkObject o  )  [static]
 

Reimplemented from vtkUnstructuredGridVolumeRayIntegrator.

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 vtkVolumeProperty property,
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.

References Psi().

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.

References Psi().

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 120 of file vtkUnstructuredGridPartialPreIntegration.h.

References vtkMath::Floor(), PSI_TABLE_SIZE, and PsiTable.

Referenced by IntegrateRay().

void vtkUnstructuredGridPartialPreIntegration::BuildPsiTable  )  [static]
 


Member Data Documentation

vtkVolumeProperty* vtkUnstructuredGridPartialPreIntegration::Property [protected]
 

Definition at line 104 of file vtkUnstructuredGridPartialPreIntegration.h.

vtkPartialPreIntegrationTransferFunction* vtkUnstructuredGridPartialPreIntegration::TransferFunctions [protected]
 

Definition at line 106 of file vtkUnstructuredGridPartialPreIntegration.h.

vtkTimeStamp vtkUnstructuredGridPartialPreIntegration::TransferFunctionsModified [protected]
 

Definition at line 107 of file vtkUnstructuredGridPartialPreIntegration.h.

int vtkUnstructuredGridPartialPreIntegration::NumIndependentComponents [protected]
 

Definition at line 108 of file vtkUnstructuredGridPartialPreIntegration.h.

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

Definition at line 113 of file vtkUnstructuredGridPartialPreIntegration.h.

Referenced by Psi().


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