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#ifndef GSKYDIR_HPP
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#define GSKYDIR_HPP
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struct cache {
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double sin_dec;
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double cos_dec;
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};
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class GSkyDir {
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public:
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GSkyDir(void) : m_ra(0.0), m_dec(0.0) {}
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GSkyDir(double ra, double dec) : m_ra(ra), m_dec(dec) {}
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virtual ~GSkyDir(void) {}
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double dist(const GSkyDir& dir) const;
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protected:
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double m_ra;
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double m_dec;
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};
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class GSkyDir2 {
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public:
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GSkyDir2(void) : m_ra(0.0), m_dec(0.0), m_has_cache(false) {}
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GSkyDir2(double ra, double dec) : m_ra(ra), m_dec(dec), m_has_cache(false) {}
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virtual ~GSkyDir2(void) {}
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double dist(const GSkyDir2& dir) const;
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const double& sin_dec(void) const;
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const double& cos_dec(void) const;
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protected:
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double m_ra;
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double m_dec;
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mutable bool m_has_cache;
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mutable double m_sin_dec;
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mutable double m_cos_dec;
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};
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inline const double& GSkyDir2::sin_dec(void) const
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{
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if (!m_has_cache) {
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m_has_cache = true;
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m_sin_dec = std::sin(m_dec);
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m_cos_dec = std::cos(m_dec);
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}
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return m_sin_dec;
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}
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inline const double& GSkyDir2::cos_dec(void) const
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{
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if (!m_has_cache) {
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m_has_cache = true;
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m_sin_dec = std::sin(m_dec);
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m_cos_dec = std::cos(m_dec);
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}
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return m_cos_dec;
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}
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class GSkyDir3 {
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public:
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GSkyDir3(void) : m_ra(0.0), m_dec(0.0), m_has_cache(false) {}
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GSkyDir3(double ra, double dec) : m_ra(ra), m_dec(dec), m_has_cache(false) {}
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virtual ~GSkyDir3(void) {}
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double dist(const GSkyDir3& dir) const;
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protected:
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double m_ra;
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double m_dec;
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mutable bool m_has_cache;
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mutable double m_sin_dec;
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mutable double m_cos_dec;
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};
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class GSkyDir4 {
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public:
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GSkyDir4(void) : m_ra(0.0), m_dec(0.0), m_cache(0) {}
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GSkyDir4(double ra, double dec) : m_ra(ra), m_dec(dec), m_cache(0) {}
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virtual ~GSkyDir4(void) { if (m_cache != 0) delete m_cache; }
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double dist(const GSkyDir4& dir) const;
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protected:
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double m_ra;
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double m_dec;
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mutable cache* m_cache;
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};
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#endif
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