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DLG.h

//
// Classes/structures to represent the data in a DLG file
//
// Copyright (c) 2001 Virtual Terrain Project
// Free for all uses, see license.txt for details.
//

#ifndef VTDATA_DLGH
#define VTDATA_DLGH

#include <stdio.h>
#include "MathTypes.h"
#include "Projections.h"

#define DLG_ERR_FILE    1
#define DLG_ERR_READ    2
#define DLG_ERR_HEADER  3
#define DLG_ERR_NODE    4
#define DLG_ERR_AREA    5
#define DLG_ERR_LINE    6

enum DLGType
{
    DLG_HYPSO,
    DLG_HYDRO,
    DLG_VEG,
    DLG_NONVEG,
    DLG_BOUNDARIES,
    DLG_MARKERS,
    DLG_ROAD,
    DLG_RAIL,
    DLG_MTF,
    DLG_UNKNOWN
};

typedef struct DLGAttribute
{
    int m_iMajorAttr, m_iMinorAttr;
} DLGAttribute;
//};

class DLGNode
{
public:
    DPoint2 m_p;
    int m_iAttribs;
};

class DLGArea
{
public:
    DPoint2 m_p;
    int m_iAttribs;
};

class DLGLine
{
public:
    int HighwayNumber();

    int m_iNode1, m_iNode2;
    int m_iLeftArea, m_iRightArea;
    int m_iCoords;
    int m_iAttribs;
    DLGAttribute *m_attr;
    DPoint2 *m_p;
};

class vtDLGFile
{
public:
    vtDLGFile();    // constructor
    ~vtDLGFile();   // destructor

    // Reads a file.  Pass it the name of a DLG-O (.opt) file.  Returns
    // true if successful.
    bool Read(const char *fname, void progress_callback(int) = NULL);

    // read a single record from the file
    bool GetRecord(char *buf);

    // after loading, guess file type from the element attributes
    DLGType GuessFileType();

    // if an error occured, return it as an English message
    const char *GetErrorMessage();

    //for m_fp
    void OpenFile();
    void CloseFile();

    // return error if it didn't load successfully
    int m_iError;

    char    m_header[80];
    int     m_iNodes;
    int     m_iAreas;
    int     m_iLines;
    bool    m_bLFdelimited;

    // used while reading
    const char* m_fname;

    // quad corners (in the ground planimetric coordinate system)
    DPoint2 m_SW_utm, m_NW_utm, m_NE_utm, m_SE_utm;
    DPoint2 m_SW_lat, m_NW_lat, m_NE_lat, m_SE_lat;

    DLGNode *m_nodes;
    DLGArea *m_areas;
    DLGLine *m_lines;

    vtProjection &GetProjection() { return m_proj; }

protected:
    FILE *m_fp;

    vtProjection    m_proj;
};

// helper
bool ConvertDLG_from_LFDelim(const char *fname_from, const char *fname_to);

#endif

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