vtkRecursiveSphereDirectionEncoder Class Reference

#include <vtkRecursiveSphereDirectionEncoder.h>

Inheritance diagram for vtkRecursiveSphereDirectionEncoder:

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Collaboration diagram for vtkRecursiveSphereDirectionEncoder:

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List of all members.


Detailed Description

A direction encoder based on the recursive subdivision of an octahedron.

vtkRecursiveSphereDirectionEncoder is a direction encoder which uses the vertices of a recursive subdivision of an octahedron (with the vertices pushed out onto the surface of an enclosing sphere) to encode directions into a two byte value.

See also:
vtkDirectionEncoder

Definition at line 33 of file vtkRecursiveSphereDirectionEncoder.h.


Public Types

typedef vtkDirectionEncoder Superclass

Public Member Functions

virtual const char * GetClassName ()
virtual int IsA (const char *type)
void PrintSelf (ostream &os, vtkIndent indent)
int GetEncodedDirection (float n[3])
float * GetDecodedGradient (int value)
int GetNumberOfEncodedDirections (void)
float * GetDecodedGradientTable (void)
virtual void SetRecursionDepth (int)
virtual int GetRecursionDepth ()

Static Public Member Functions

static int IsTypeOf (const char *type)
static
vtkRecursiveSphereDirectionEncoder
SafeDownCast (vtkObject *o)
static
vtkRecursiveSphereDirectionEncoder
New ()

Protected Member Functions

 vtkRecursiveSphereDirectionEncoder ()
 ~vtkRecursiveSphereDirectionEncoder ()
void InitializeIndexTable (void)

Protected Attributes

int RecursionDepth
int * IndexTable
float * DecodedNormal
int IndexTableRecursionDepth
int OuterSize
int InnerSize
int GridSize

Member Typedef Documentation

Get the name of this class

Reimplemented from vtkDirectionEncoder.

Definition at line 36 of file vtkRecursiveSphereDirectionEncoder.h.


Constructor & Destructor Documentation

vtkRecursiveSphereDirectionEncoder::vtkRecursiveSphereDirectionEncoder (  )  [protected]

vtkRecursiveSphereDirectionEncoder::~vtkRecursiveSphereDirectionEncoder (  )  [protected]


Member Function Documentation

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

Get the name of this class

Reimplemented from vtkDirectionEncoder.

static int vtkRecursiveSphereDirectionEncoder::IsTypeOf ( const char *  type  )  [static]

Get the name of this class

Reimplemented from vtkDirectionEncoder.

virtual int vtkRecursiveSphereDirectionEncoder::IsA ( const char *  type  )  [virtual]

Get the name of this class

Reimplemented from vtkDirectionEncoder.

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

Get the name of this class

Reimplemented from vtkDirectionEncoder.

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

Get the name of this class

Reimplemented from vtkDirectionEncoder.

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

Construct the object. Initialize the index table which will be used to map the normal into a patch on the recursively subdivided sphere.

Reimplemented from vtkObject.

int vtkRecursiveSphereDirectionEncoder::GetEncodedDirection ( float  n[3]  )  [virtual]

Given a normal vector n, return the encoded direction

Implements vtkDirectionEncoder.

float* vtkRecursiveSphereDirectionEncoder::GetDecodedGradient ( int  value  )  [virtual]

/ Given an encoded value, return a pointer to the normal vector

Implements vtkDirectionEncoder.

int vtkRecursiveSphereDirectionEncoder::GetNumberOfEncodedDirections ( void   )  [virtual]

Return the number of encoded directions

Implements vtkDirectionEncoder.

float* vtkRecursiveSphereDirectionEncoder::GetDecodedGradientTable ( void   )  [virtual]

Get the decoded gradient table. There are this->GetNumberOfEncodedDirections() entries in the table, each containing a normal (direction) vector. This is a flat structure - 3 times the number of directions floats in an array.

Implements vtkDirectionEncoder.

virtual void vtkRecursiveSphereDirectionEncoder::SetRecursionDepth ( int   )  [virtual]

Set / Get the recursion depth for the subdivision. This indicates how many time one triangle on the initial 8-sided sphere model is replaced by four triangles formed by connecting triangle edge midpoints. A recursion level of 0 yields 8 triangles with 6 unique vertices. The normals are the vectors from the sphere center through the vertices. The number of directions will be 11 since the four normals with 0 z values will be duplicated in the table - once with +0 values and the other time with -0 values, and an addition index will be used to represent the (0,0,0) normal. If we instead choose a recursion level of 6 (the maximum that can fit within 2 bytes) the number of directions is 16643, with 16386 unique directions and a zero normal.

virtual int vtkRecursiveSphereDirectionEncoder::GetRecursionDepth (  )  [virtual]

Set / Get the recursion depth for the subdivision. This indicates how many time one triangle on the initial 8-sided sphere model is replaced by four triangles formed by connecting triangle edge midpoints. A recursion level of 0 yields 8 triangles with 6 unique vertices. The normals are the vectors from the sphere center through the vertices. The number of directions will be 11 since the four normals with 0 z values will be duplicated in the table - once with +0 values and the other time with -0 values, and an addition index will be used to represent the (0,0,0) normal. If we instead choose a recursion level of 6 (the maximum that can fit within 2 bytes) the number of directions is 16643, with 16386 unique directions and a zero normal.

void vtkRecursiveSphereDirectionEncoder::InitializeIndexTable ( void   )  [protected]


Member Data Documentation

Definition at line 81 of file vtkRecursiveSphereDirectionEncoder.h.

Definition at line 86 of file vtkRecursiveSphereDirectionEncoder.h.

Definition at line 92 of file vtkRecursiveSphereDirectionEncoder.h.

Definition at line 98 of file vtkRecursiveSphereDirectionEncoder.h.

Definition at line 100 of file vtkRecursiveSphereDirectionEncoder.h.

Definition at line 101 of file vtkRecursiveSphereDirectionEncoder.h.

Definition at line 102 of file vtkRecursiveSphereDirectionEncoder.h.


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

Generated on Sat Dec 27 13:47:04 2008 for VTK by  doxygen 1.5.6