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vtkDirectionEncoder Class Reference

encode a direction into a one or two byte value. More...

#include <vtkDirectionEncoder.h>

Inheritance diagram for vtkDirectionEncoder:

[legend]Collaboration diagram for vtkDirectionEncoder:

[legend]List of all members.

[NOHEADER]
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
int	IsTypeOf (const char *type)
vtkDirectionEncoder *	SafeDownCast (vtkObject *o)
Public Methods
virtual int	GetEncodedDirection (float n[3])=0
virtual float *	GetDecodedGradient (int value)=0
virtual int	GetNumberOfEncodedDirections (void)=0
virtual float *	GetDecodedGradientTable (void)=0
Protected Methods
	vtkDirectionEncoder ()
	~vtkDirectionEncoder ()

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Detailed Description

encode a direction into a one or two byte value.

Date:

2001/10/11 13:38:07

Revision:

1.14

Given a direction, encode it into an integer value. This value should be less than 65536, which is the maximum number of encoded directions supported by this superclass. A direction encoded is used to encode normals in a volume for use during volume rendering, and the amount of space that is allocated per normal is 2 bytes. This is an abstract superclass - see the subclasses for specific implementation details.

See also:

vtkRecursiveSphereDirectionEncoder

Definition at line 65 of file vtkDirectionEncoder.h.

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Constructor & Destructor Documentation

vtkDirectionEncoder::vtkDirectionEncoder (    )  [inline, protected]

Definition at line 89 of file vtkDirectionEncoder.h.

vtkDirectionEncoder::~vtkDirectionEncoder (    )  [inline, protected]

Definition at line 90 of file vtkDirectionEncoder.h.

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Member Function Documentation

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

Get the name of this class Reimplemented from vtkObject. Reimplemented in vtkRecursiveSphereDirectionEncoder.

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

Get the name of this class Reimplemented from vtkObject. Reimplemented in vtkRecursiveSphereDirectionEncoder.

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

Get the name of this class Reimplemented from vtkObject. Reimplemented in vtkRecursiveSphereDirectionEncoder.

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

Get the name of this class Reimplemented from vtkObject. Reimplemented in vtkRecursiveSphereDirectionEncoder.

virtual int vtkDirectionEncoder::GetEncodedDirection (  float    n[3] )  [pure virtual]

Given a normal vector n, return the encoded direction Reimplemented in vtkRecursiveSphereDirectionEncoder.

virtual float* vtkDirectionEncoder::GetDecodedGradient (  int    value )  [pure virtual]

/ Given an encoded value, return a pointer to the normal vector Reimplemented in vtkRecursiveSphereDirectionEncoder.

virtual int vtkDirectionEncoder::GetNumberOfEncodedDirections (  void    )  [pure virtual]

Return the number of encoded directions Reimplemented in vtkRecursiveSphereDirectionEncoder.

virtual float* vtkDirectionEncoder::GetDecodedGradientTable (  void    )  [pure 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. Reimplemented in vtkRecursiveSphereDirectionEncoder.

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

• Rendering/vtkDirectionEncoder.h

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