dox/Common/vtkScalarsToColors.h

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

  Program:   Visualization Toolkit
  Module:    vtkScalarsToColors.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 __vtkScalarsToColors_h
#define __vtkScalarsToColors_h

#include "vtkObject.h"

class vtkDataArray;
class vtkUnsignedCharArray;

class VTK_COMMON_EXPORT vtkScalarsToColors : public vtkObject
{
public:
  vtkTypeMacro(vtkScalarsToColors,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);
  static vtkScalarsToColors *New();

  virtual int IsOpaque();
  
  virtual void Build() {};
  

  virtual double *GetRange();
  virtual void SetRange(double min, double max);
  void SetRange(double rng[2])
    {this->SetRange(rng[0],rng[1]);}
  
  virtual unsigned char *MapValue(double v);

  virtual void GetColor(double v, double rgb[3]);


  double *GetColor(double v)
    {this->GetColor(v,this->RGB); return this->RGB;}
 
  virtual double GetOpacity(double v);


  double GetLuminance(double x) 
    {double rgb[3]; this->GetColor(x,rgb);
    return static_cast<double>(rgb[0]*0.30 + rgb[1]*0.59 + rgb[2]*0.11);}


  virtual void SetAlpha(double alpha);
  vtkGetMacro(Alpha,double);


  virtual vtkUnsignedCharArray *MapScalars(vtkDataArray *scalars, int colorMode,
                                   int component);


  vtkSetMacro(VectorMode, int);
  vtkGetMacro(VectorMode, int);
  void SetVectorModeToMagnitude();
  void SetVectorModeToComponent();
  void SetVectorModeToRGBColors();

//BTX
  enum VectorModes {
    MAGNITUDE=0,
    COMPONENT=1,
    RGBCOLORS=2
  };
//ETX



  vtkSetMacro(VectorComponent, int);
  vtkGetMacro(VectorComponent, int);


  vtkSetMacro(VectorSize, int);
  vtkGetMacro(VectorSize, int);


  void MapVectorsThroughTable(void *input, unsigned char *output,
                              int inputDataType, int numberOfValues,
                              int inputIncrement, int outputFormat,
                              int vectorComponent, int vectorSize);
  void MapVectorsThroughTable(void *input, unsigned char *output,
                              int inputDataType, int numberOfValues,
                              int inputIncrement, int outputFormat)
    { this->MapVectorsThroughTable(input, output, inputDataType, numberOfValues,
                                   inputIncrement, outputFormat, -1, -1); }


  void MapScalarsThroughTable(vtkDataArray *scalars, 
                              unsigned char *output,
                              int outputFormat);
  void MapScalarsThroughTable(vtkDataArray *scalars, 
                              unsigned char *output) 
    {this->MapScalarsThroughTable(scalars,output,VTK_RGBA);}
  void MapScalarsThroughTable(void *input, unsigned char *output,
                              int inputDataType, int numberOfValues,
                              int inputIncrement,
                              int outputFormat)
    {this->MapScalarsThroughTable2(input, output, inputDataType,
       numberOfValues, inputIncrement, outputFormat);}


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


  virtual vtkUnsignedCharArray *ConvertUnsignedCharToRGBA(
    vtkUnsignedCharArray *colors, int numComp, int numTuples);

  virtual void DeepCopy(vtkScalarsToColors *o);


  virtual int UsingLogScale()
    { return 0; }

  virtual vtkIdType GetNumberOfAvailableColors();

protected:
  vtkScalarsToColors();
  ~vtkScalarsToColors() {}


  void MapColorsToColors(void *input, unsigned char *output,
                         int inputDataType, int numberOfValues,
                         int numberOfComponents, int vectorSize,
                         int outputFormat);


  void MapVectorsToMagnitude(void *input, double *output,
                             int inputDataType, int numberOfValues,
                             int numberOfComponents, int vectorSize);

  double Alpha;

  // How to map arrays with multiple components.
  int VectorMode;
  int VectorComponent;
  int VectorSize;

  // Obsolete, kept so subclasses will still compile
  int UseMagnitude;

private:
  double RGB[3];
  unsigned char RGBABytes[4];
  double InputRange[2];

  vtkScalarsToColors(const vtkScalarsToColors&);  // Not implemented.
  void operator=(const vtkScalarsToColors&);  // Not implemented.
};

#endif