vtkColorTransferFunction.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkColorTransferFunction.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.

=========================================================================*/
#ifndef vtkColorTransferFunction_h
#define vtkColorTransferFunction_h

#include "vtkRenderingCoreModule.h" // For export macro
#include "vtkScalarsToColors.h"

class vtkColorTransferFunctionInternals;

#define VTK_CTF_RGB           0
#define VTK_CTF_HSV           1
#define VTK_CTF_LAB           2
#define VTK_CTF_DIVERGING     3

#define VTK_CTF_LINEAR        0
#define VTK_CTF_LOG10         1

class VTKRENDERINGCORE_EXPORT vtkColorTransferFunction : public vtkScalarsToColors
{
public:
  static vtkColorTransferFunction *New();
  vtkTypeMacro(vtkColorTransferFunction,vtkScalarsToColors);
  void DeepCopy( vtkScalarsToColors *f );
  void ShallowCopy( vtkColorTransferFunction *f );

  void PrintSelf(ostream& os, vtkIndent indent);

  int GetSize();


  int AddRGBPoint( double x, double r, double g, double b );
  int AddRGBPoint( double x, double r, double g, double b,
                   double midpoint, double sharpness );
  int AddHSVPoint( double x, double h, double s, double v );
  int AddHSVPoint( double x, double h, double s, double v,
                   double midpoint, double sharpness );
  int RemovePoint( double x );


  void AddRGBSegment( double x1, double r1, double g1, double b1,
                      double x2, double r2, double g2, double b2 );
  void AddHSVSegment( double x1, double h1, double s1, double v1,
                      double x2, double h2, double s2, double v2 );

  void RemoveAllPoints();

  double *GetColor(double x) {
    return vtkScalarsToColors::GetColor(x); }
  void GetColor(double x, double rgb[3]);


  double GetRedValue( double x );
  double GetGreenValue( double x );
  double GetBlueValue( double x );


  int GetNodeValue( int index, double val[6] );
  int SetNodeValue( int index, double val[6] );

  virtual unsigned char *MapValue(double v);


  vtkGetVector2Macro( Range, double );

  int AdjustRange(double range[2]);


  void GetTable( double x1, double x2, int n, double* table );
  void GetTable( double x1, double x2, int n, float* table );
  const unsigned char *GetTable( double x1, double x2, int n );

  void BuildFunctionFromTable( double x1, double x2, int size, double *table );


  vtkSetClampMacro( Clamping, int, 0, 1 );
  vtkGetMacro( Clamping, int );
  vtkBooleanMacro( Clamping, int );


  vtkSetClampMacro( ColorSpace, int, VTK_CTF_RGB, VTK_CTF_DIVERGING );
  void SetColorSpaceToRGB(){this->SetColorSpace(VTK_CTF_RGB);};
  void SetColorSpaceToHSV(){this->SetColorSpace(VTK_CTF_HSV);};
  void SetColorSpaceToLab(){this->SetColorSpace(VTK_CTF_LAB);};
  void SetColorSpaceToDiverging(){this->SetColorSpace(VTK_CTF_DIVERGING);}
  vtkGetMacro( ColorSpace, int );
  vtkSetMacro(HSVWrap, int);
  vtkGetMacro(HSVWrap, int);
  vtkBooleanMacro(HSVWrap, int);


  vtkSetMacro(Scale,int);
  void SetScaleToLinear() { this->SetScale(VTK_CTF_LINEAR); };
  void SetScaleToLog10() { this->SetScale(VTK_CTF_LOG10); };
  vtkGetMacro(Scale,int);


  vtkSetVector3Macro(NanColor, double);
  vtkGetVector3Macro(NanColor, double);


  vtkSetVector3Macro(BelowRangeColor, double);
  vtkGetVector3Macro(BelowRangeColor, double);


  vtkSetMacro(UseBelowRangeColor, int);
  vtkGetMacro(UseBelowRangeColor, int);
  vtkBooleanMacro(UseBelowRangeColor, int);


  vtkSetVector3Macro(AboveRangeColor, double);
  vtkGetVector3Macro(AboveRangeColor, double);


  vtkSetMacro(UseAboveRangeColor, int);
  vtkGetMacro(UseAboveRangeColor, int);
  vtkBooleanMacro(UseAboveRangeColor, int);

  double* GetDataPointer();

  void FillFromDataPointer(int n, double* ptr);

  virtual void MapScalarsThroughTable2(void *input, unsigned char *output,
                                       int inputDataType, int numberOfValues,
                                       int inputIncrement, int outputIncrement);


  vtkSetMacro(AllowDuplicateScalars, int);
  vtkGetMacro(AllowDuplicateScalars, int);
  vtkBooleanMacro(AllowDuplicateScalars, int);

  virtual vtkIdType GetNumberOfAvailableColors();

  virtual void GetIndexedColor(vtkIdType idx, double rgba[4]);

  int EstimateMinNumberOfSamples(double const & x1, double const & x2);

protected:
  vtkColorTransferFunction();
  ~vtkColorTransferFunction();

  vtkColorTransferFunctionInternals *Internal;

  int Clamping;

  int ColorSpace;

  int HSVWrap;

  int Scale;

  double NanColor[3];

  double BelowRangeColor[3];

  int UseBelowRangeColor;

  double AboveRangeColor[3];

  int UseAboveRangeColor;

  double* Function;

  double Range[2];

  unsigned char UnsignedCharRGBAValue[4];

  int AllowDuplicateScalars;

  vtkTimeStamp BuildTime;
  unsigned char *Table;

  int TableSize;

  virtual void SetRange(double, double) {}
  void SetRange(double rng[2]) {this->SetRange(rng[0],rng[1]);};

  void SortAndUpdateRange();

  bool UpdateRange();

  void MovePoint(double oldX, double newX);

  double FindMinimumXDistance();

private:
  vtkColorTransferFunction(const vtkColorTransferFunction&) VTK_DELETE_FUNCTION;
  void operator=(const vtkColorTransferFunction&) VTK_DELETE_FUNCTION;
};

#endif