mirror of https://github.com/axmolengine/axmol.git
37 lines
958 B
C++
37 lines
958 B
C++
#ifndef COMMON_ALNUMBERS_H
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#define COMMON_ALNUMBERS_H
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#include <utility>
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namespace al {
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namespace numbers {
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namespace detail_ {
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template<typename T>
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using as_fp = std::enable_if_t<std::is_floating_point<T>::value, T>;
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} // detail_
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template<typename T>
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inline constexpr auto pi_v = detail_::as_fp<T>(3.141592653589793238462643383279502884L);
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template<typename T>
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inline constexpr auto inv_pi_v = detail_::as_fp<T>(0.318309886183790671537767526745028724L);
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template<typename T>
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inline constexpr auto sqrt2_v = detail_::as_fp<T>(1.414213562373095048801688724209698079L);
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template<typename T>
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inline constexpr auto sqrt3_v = detail_::as_fp<T>(1.732050807568877293527446341505872367L);
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inline constexpr auto pi = pi_v<double>;
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inline constexpr auto inv_pi = inv_pi_v<double>;
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inline constexpr auto sqrt2 = sqrt2_v<double>;
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inline constexpr auto sqrt3 = sqrt3_v<double>;
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} // namespace numbers
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} // namespace al
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#endif /* COMMON_ALNUMBERS_H */
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