gdbTerrainReader.h

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/*********************************************************************
** Copyright (c) 1999 MAK Technologies, Inc.
** All rights reserved.
*********************************************************************/
/*********************************************************************
** $RCSfile: gdbTerrainReader.h,v $ $Revision: 1.16 $ $State: Exp $
*********************************************************************/
#ifndef gdbTerrainReader_H_
#define gdbTerrainReader_H_


#include "gdb/gdbDefines.h"
#include <stdio.h>
#include "terrainCS/coordSystem.h"
#include "gdb/terrainModifiedCallbackInfo.h"
#include "gdb/terrainReader.h"

class DtTerrainDatabase;
class DtExtentInitializer;
class DtGdbReaderInitializer;
class DtFilename;
class DtSpatialSubdivisionTerrainIntersectorDescriptor;

class DT_DLL_gdb DtGdbTerrainReader : public DtTerrainReader
{
public:
   
   DtGdbTerrainReader();

   virtual ~DtGdbTerrainReader();
   
private:

   DtGdbTerrainReader(const DtGdbTerrainReader& original);
   const DtGdbTerrainReader& operator=(const DtGdbTerrainReader& original);

public:

   virtual bool loadTerrain(const DtFilename& filename, DtTerrainDatabase* terrain);
   
   virtual bool loadTerrain(const DtFilename& filename, DtTerrainDatabase* terrain, 
      const DtTerrainInitializer* initializer);
   
   static DtTerrainReader * create();
   
   virtual const DtString dataType() const;
   
   virtual bool readFromFile(const DtFilename& basename, DtTerrainDatabase* terrain);

   // 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);

   // Returns only the optional file flags.  Should not load any polygonal or vector information
   virtual int optionalFileFlags(const DtFilename& filename);
   
protected:

   bool testInvariant() const;

   bool createTerrain(const DtFilename& filename,
      DtTerrainDatabase& terrainDb, const DtGdbReaderInitializer& gdbInitializer);

   bool loadTerrainFromFile(const DtFilename& filename, 
      DtTerrainDatabase& terrainDb, const DtGdbReaderInitializer& gdbInitializer);


   // I/O calls.
   virtual bool readCoordinateSystem(FILE* fp);

   // closes the file pointer before returning.
   // Returns false if unable to read version number for any reason.
   virtual bool readVersionNumber(const DtFilename& basename, DtTerrainFileVersionNumber& versionNumber);
  

   virtual bool readVersionNumberFromFile(FILE* fp);

   virtual bool loadTerrainUsingGdbReader(const DtFilename& basename, 
                                          const DtTerrainFileVersionNumber versionNumber, 
                                          DtTerrainDatabase* terrain);

   virtual DtTerrainFileVersionNumber versionNumberFromFile() const;

   virtual void setVersionNumberFromFile(DtTerrainFileVersionNumber versionNumber);

   virtual bool verifyFileType(DtString filename, const DtString& type = "gdb");

   virtual bool loadSpatialSubdivision(FILE* fp, 
      DtSpatialSubdivisionTerrainIntersectorDescriptor& descriptor) const;

private:

   DtTerrainFileVersionNumber myVersionNumberFromFile;

};

#endif