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79 lines
1.5 KiB
C++
79 lines
1.5 KiB
C++
#ifndef DEM_H
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#define DEM_H
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#include <QString>
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#include <QCache>
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#include <QByteArray>
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#include <QMutex>
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#include "common/hash.h"
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#include "data/area.h"
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#include "matrix.h"
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class DEM
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{
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public:
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class Tile {
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public:
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Tile(int lon, int lat) : _lon(lon), _lat(lat) {}
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int lon() const {return _lon;}
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int lat() const {return _lat;}
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QString lonStr() const;
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QString latStr() const;
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QString fileName() const;
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bool operator==(const Tile &other) const
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{
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return (_lon == other._lon && _lat == other._lat);
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}
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private:
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int _lon, _lat;
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};
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static void setCacheSize(int size);
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static void setDir(const QString &path);
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static void clearCache();
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static double elevation(const Coordinates &c);
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static MatrixD elevation(const MatrixC &m);
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static QList<Area> tiles();
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private:
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class Entry {
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public:
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Entry() : _samples(0) {}
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Entry(const QByteArray &data);
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const QByteArray &data() const {return _data;}
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int samples() const {return _samples;}
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private:
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unsigned int _samples;
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QByteArray _data;
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};
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typedef QCache<DEM::Tile, Entry> TileCache;
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static double height(const Coordinates &c, const Entry *e);
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static Entry *loadTile(const Tile &tile);
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static double elevationLockFree(const Coordinates &c);
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static QString _dir;
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static TileCache _data;
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static QMutex _lock;
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};
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inline HASH_T qHash(const DEM::Tile &tile)
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{
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return (qHash(tile.lon()) ^ qHash(tile.lat()));
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}
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#ifndef QT_NO_DEBUG
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QDebug operator<<(QDebug dbg, const DEM::Tile &tile);
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#endif // QT_NO_DEBUG
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#endif // DEM_H
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