dox/Common/vtkLookupTable.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkLookupTable.h,v $

  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 __vtkLookupTable_h
#define __vtkLookupTable_h

#include "vtkScalarsToColors.h"

#include "vtkUnsignedCharArray.h" // Needed for inline method

#define VTK_RAMP_LINEAR 0
#define VTK_RAMP_SCURVE 1
#define VTK_RAMP_SQRT 2
#define VTK_SCALE_LINEAR 0
#define VTK_SCALE_LOG10 1

class VTK_COMMON_EXPORT vtkLookupTable : public vtkScalarsToColors
{
public:
  static vtkLookupTable *New();
  
  vtkTypeRevisionMacro(vtkLookupTable,vtkScalarsToColors);
  void PrintSelf(ostream& os, vtkIndent indent);
  
  virtual int IsOpaque();
  
  int Allocate(int sz=256, int ext=256);
  
  virtual void Build();

  virtual void ForceBuild();


  vtkSetMacro(Ramp,int);
  void SetRampToLinear() { this->SetRamp(VTK_RAMP_LINEAR); };
  void SetRampToSCurve() { this->SetRamp(VTK_RAMP_SCURVE); };
  void SetRampToSQRT() { this->SetRamp(VTK_RAMP_SQRT); };
  vtkGetMacro(Ramp,int);


  void SetScale(int scale);
  void SetScaleToLinear() { this->SetScale(VTK_SCALE_LINEAR); };
  void SetScaleToLog10() { this->SetScale(VTK_SCALE_LOG10); };
  vtkGetMacro(Scale,int);


  void SetTableRange(double r[2]); 
  virtual void SetTableRange(double min, double max);
  vtkGetVectorMacro(TableRange,double,2);


  vtkSetVector2Macro(HueRange,double);
  vtkGetVector2Macro(HueRange,double);


  vtkSetVector2Macro(SaturationRange,double);
  vtkGetVector2Macro(SaturationRange,double);


  vtkSetVector2Macro(ValueRange,double);
  vtkGetVector2Macro(ValueRange,double);


  vtkSetVector2Macro(AlphaRange,double);
  vtkGetVector2Macro(AlphaRange,double);

  unsigned char *MapValue(double v);

  void GetColor(double x, double rgb[3]);

  double GetOpacity(double v);

  virtual vtkIdType GetIndex(double v);


  void SetNumberOfTableValues(vtkIdType number);
  vtkIdType GetNumberOfTableValues() { return this->NumberOfColors; };

  void SetTableValue(vtkIdType indx, double rgba[4]);

  void SetTableValue(vtkIdType indx, double r, double g, double b, double a=1.0);

  double *GetTableValue(vtkIdType id);

  void GetTableValue(vtkIdType id, double rgba[4]);


  unsigned char *GetPointer(const vtkIdType id) {
    return this->Table->GetPointer(4*id); };

  unsigned char *WritePointer(const vtkIdType id, const int number);


  double *GetRange() { return this->GetTableRange(); };
  void SetRange(double min, double max) { this->SetTableRange(min, max); };
  void SetRange(double rng[2]) { this->SetRange(rng[0], rng[1]); };


  vtkSetClampMacro(NumberOfColors,vtkIdType,2,VTK_LARGE_ID);
  vtkGetMacro(NumberOfColors,vtkIdType);


  void SetTable(vtkUnsignedCharArray *);
  vtkGetObjectMacro(Table,vtkUnsignedCharArray);


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

  void DeepCopy(vtkLookupTable *lut);


  virtual int UsingLogScale()
    {
    return (this->GetScale() == VTK_SCALE_LOG10)? 1 : 0;
    }

protected:
  vtkLookupTable(int sze=256, int ext=256);
  ~vtkLookupTable();

  vtkIdType NumberOfColors;
  vtkUnsignedCharArray *Table;
  double TableRange[2];
  double HueRange[2];
  double SaturationRange[2];
  double ValueRange[2];
  double AlphaRange[2];
  int Scale;
  int Ramp;
  vtkTimeStamp InsertTime;
  vtkTimeStamp BuildTime;
  double RGBA[4]; //used during conversion process

  int OpaqueFlag;
  vtkTimeStamp OpaqueFlagBuildTime;
  
private:
  vtkLookupTable(const vtkLookupTable&);  // Not implemented.
  void operator=(const vtkLookupTable&);  // Not implemented.
};

//----------------------------------------------------------------------------
inline unsigned char *vtkLookupTable::WritePointer(const vtkIdType id, 
                                                   const int number)
{
  this->InsertTime.Modified();
  return this->Table->WritePointer(4*id,4*number);
}

#endif

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