QuantifiedColorMap.h

 
#pragma once
 
#if defined(QuantifiedColorMap_RECURSES)
#error Recursive header files inclusion detected in QuantifiedColorMap.h
#else // defined(QuantifiedColorMap_RECURSES)
#define QuantifiedColorMap_RECURSES
 
#if !defined QuantifiedColorMap_h
#define QuantifiedColorMap_h
 
// Inclusions
#include <iostream>
#include <sstream>
#include <string>
#include "DGtal/base/Common.h"
#include "DGtal/base/Clone.h"
#include "DGtal/io/Color.h"
#include "DGtal/io/colormaps/CColorMap.h"
 
namespace DGtal
{
 
  // template class QuantifiedColorMap
  template < typename TColorMap >
  struct QuantifiedColorMap
  {
    BOOST_CONCEPT_ASSERT(( concepts::CColorMap< TColorMap > ));
    using ColorMap = TColorMap;
    using Self     = QuantifiedColorMap< ColorMap >;
    using Value    = typename ColorMap::Value;
 
    //---------------------------------------------------------------------------
  public:
 
    QuantifiedColorMap( Clone< ColorMap > colormap, int nb = 50 )
      : myColorMap( colormap ), myNbColors( nb )
    {}
 
    Color operator()( const Value & value ) const
    {
      const Value rel  = ( value - myColorMap.min() )
        / ( myColorMap.max() - myColorMap.min() );
      const Value qrel = round( myNbColors * rel ) / myNbColors;
      const Value outv = qrel * ( myColorMap.max() - myColorMap.min() )
        + myColorMap.min();
      return myColorMap( outv );
    }
 
    //---------------------------------------------------------------------------
  public:
    ColorMap myColorMap;
    int myNbColors;
    
  };
 
  template < typename TColorMap >
  QuantifiedColorMap< TColorMap >
  makeQuantifiedColorMap( TColorMap colormap, int nb = 50 )
  {
    return QuantifiedColorMap< TColorMap >( colormap, nb );
  }
 
} // namespace DGtal
 
// Includes inline functions.
//                                                                           //
 
#endif // !defined QuantifiedColorMap_h
 
#undef QuantifiedColorMap_RECURSES
#endif // else defined(QuantifiedColorMap_RECURSES)