include/dted/dtedTdb.h

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/*********************************************************************
** Copyright (c) 1998 MAK Technologies, Inc.
** All rights reserved.
*********************************************************************/
/*********************************************************************
** $RCSfile: dtedTdb.h,v $ $Revision: 1.18 $ $State: Exp $
*********************************************************************/
#ifndef dtedTdb_H_
#define dtedTdb_H_

#include "dted/dtedDefines.h"
#include "gdb/terrainReader.h"

class DtList;
class DtFilename;
class DtSurfaceManager;
class DtTerrainInitializer;
class DtDtedInitializer;

//
// Instances of DtDtedReader are a list of DtDtedCells.
class DT_DLL_dted DtDtedReader : public DtTerrainReader
{

public:

   // constructor
   DtDtedReader();

   // destructor
   virtual ~DtDtedReader();

   virtual bool loadTerrain(const DtFilename& filename, DtTerrainDatabase* terrain);

   virtual bool loadTerrain(const DtFilename& path, DtTerrainDatabase* terrain, 
      const DtTerrainInitializer* initializer );

   // Returns "dted"
   virtual const DtString dataType() const;

   static DtTerrainReader* create();

   // Returns only the coordinate system that would define this database.  Should not load
   // any polygonal or vector information
   virtual Coordinate_System* coordinateSystem(const DtFilename& filename);

protected:
   
   // copy constructor
   DtDtedReader(const DtDtedReader& orig);

   // assignment operator
   DtDtedReader& operator=(const DtDtedReader& orig);

   // Load a dted database (filename is the filename of a terrain metafile).
   // We need the path to this file in case the dted files specified in the
   // record are relative paths.
   virtual bool Load(const DtFilename& filename, const DtDtedInitializer* i);

   bool testInvariant() const;

   virtual int optionalFileFlags(const DtFilename& filename)
   {
      return 0;
   }

protected:

   DtList* myDtedCellList;
   int myPostSpacing;

   static const unsigned int theNumColorGradations;
   static const unsigned int theDefaultDt0Spacing;
   static const unsigned int theDefaultDt1Spacing;
   static const unsigned int theDefaultDt2Spacing;

};

#endif