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36 lines
795 B
C++
36 lines
795 B
C++
#ifndef PRIMEMERIDIAN_H
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#define PRIMEMERIDIAN_H
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#include <cmath>
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#include <QDebug>
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class PrimeMeridian
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{
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public:
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PrimeMeridian() : _pm(NAN) {}
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PrimeMeridian(int code);
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bool isNull() const {return std::isnan(_pm);}
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bool isValid() const {return !std::isnan(_pm);}
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double toGreenwich(double val) const;
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double fromGreenwich(double val) const;
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friend bool operator==(const PrimeMeridian &pm1, const PrimeMeridian &pm2);
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#ifndef QT_NO_DEBUG
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friend QDebug operator<<(QDebug dbg, const PrimeMeridian &pm);
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#endif // QT_NO_DEBUG
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private:
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double _pm;
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};
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inline bool operator==(const PrimeMeridian &pm1, const PrimeMeridian &pm2)
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{return (pm1._pm == pm2._pm);}
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#ifndef QT_NO_DEBUG
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QDebug operator<<(QDebug dbg, const PrimeMeridian &pm);
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#endif // QT_NO_DEBUG
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#endif // PRIMEMERIDIAN_H
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