//=============================================================================
  // Heightmap.h by Frank Luna (C) 2004 All Rights Reserved.
  //=============================================================================
  
  ifndef HEIGHTMAP_H
  define HEIGHTMAP_H
  
  include <d3dUtil.h>
  include <Table.h>
  include <string>
  
  class Heightmap
  {
  public:
          Heightmap();
          Heightmap(int m, int n);
          Heightmap(int m, int n, 
                  const std::string& filename, float heightScale, float heightOffset);
  
          void recreate(int m, int n);
  
          void loadRAW(int m, int n,
                  const std::string& filename, float heightScale, float heightOffset);
  
          int numRows()const;
          int numCols()const;
  
          // For non-const objects
          float& operator()(int i, int j);
  
          // For const objects
          const float& operator()(int i, int j)const;
  
  private:
          bool  inBounds(int i, int j);
          float sampleHeight3x3(int i, int j);
          void  filter3x3();
  private:
          std::string  mHeightMapFilename;
          Table<float> mHeightMap;
          float        mHeightScale;
          float        mHeightOffset;
  };
  
  endif //HEIGHTMAP_H