You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
/*=========================================================================
|
|
|
|
Program: Visualization Toolkit
|
|
Module: vtkDirectionEncoder.h
|
|
|
|
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
|
|
All rights reserved.
|
|
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
|
|
|
|
This software is distributed WITHOUT ANY WARRANTY; without even
|
|
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
|
PURPOSE. See the above copyright notice for more information.
|
|
|
|
=========================================================================*/
|
|
|
|
/**
|
|
* @class vtkDirectionEncoder
|
|
* @brief encode a direction into a one or two byte value
|
|
*
|
|
*
|
|
* 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.
|
|
*
|
|
* @sa
|
|
* vtkRecursiveSphereDirectionEncoder
|
|
*/
|
|
|
|
#ifndef vtkDirectionEncoder_h
|
|
#define vtkDirectionEncoder_h
|
|
|
|
#include "vtkObject.h"
|
|
#include "vtkRenderingVolumeModule.h" // For export macro
|
|
|
|
class VTKRENDERINGVOLUME_EXPORT vtkDirectionEncoder : public vtkObject
|
|
{
|
|
public:
|
|
//@{
|
|
/**
|
|
* Get the name of this class
|
|
*/
|
|
vtkTypeMacro(vtkDirectionEncoder, vtkObject);
|
|
void PrintSelf(ostream& os, vtkIndent indent) override;
|
|
//@}
|
|
|
|
/**
|
|
* Given a normal vector n, return the encoded direction
|
|
*/
|
|
virtual int GetEncodedDirection(float n[3]) = 0;
|
|
|
|
/**
|
|
* / Given an encoded value, return a pointer to the normal vector
|
|
*/
|
|
virtual float* GetDecodedGradient(int value) VTK_SIZEHINT(3) = 0;
|
|
|
|
/**
|
|
* Return the number of encoded directions
|
|
*/
|
|
virtual int GetNumberOfEncodedDirections(void) = 0;
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
virtual float* GetDecodedGradientTable(void) = 0;
|
|
|
|
protected:
|
|
vtkDirectionEncoder() {}
|
|
~vtkDirectionEncoder() override {}
|
|
|
|
private:
|
|
vtkDirectionEncoder(const vtkDirectionEncoder&) = delete;
|
|
void operator=(const vtkDirectionEncoder&) = delete;
|
|
};
|
|
|
|
#endif
|