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Added vector retionnal with max ULPs arguments
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@ -206,5 +206,18 @@ namespace detail
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return genType(1);
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}
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};
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// https://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/
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union float_t
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{
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GLM_CONSTEXPR float_t(float Num = 0.0f) : f(Num) {}
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// Portable extraction of components.
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GLM_CONSTEXPR bool negative() const { return i < 0; }
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GLM_CONSTEXPR int mantissa() const { return i & ((1 << 23) - 1); }
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GLM_CONSTEXPR int exponent() const { return (i >> 23) & 0xFF; }
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int const i;
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float const f;
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};
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}//namespace detail
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}//namespace glm
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@ -2,23 +2,8 @@
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#include "../ext/scalar_int_sized.hpp"
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#include "../ext/scalar_uint_sized.hpp"
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namespace glm{
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namespace detail
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namespace glm
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{
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// https://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/
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union float_t
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{
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GLM_CONSTEXPR float_t(float Num = 0.0f) : f(Num) {}
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// Portable extraction of components.
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GLM_CONSTEXPR bool negative() const { return i < 0; }
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GLM_CONSTEXPR int32 mantissa() const { return i & ((1 << 23) - 1); }
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GLM_CONSTEXPR int32 exponent() const { return (i >> 23) & 0xFF; }
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int32 const i;
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float const f;
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};
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}//namespace detail
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template<typename genType>
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GLM_FUNC_QUALIFIER GLM_CONSTEXPR bool equal(genType const& x, genType const& y, genType const& epsilon)
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{
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@ -62,6 +62,42 @@ namespace glm
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template<length_t L, typename T, qualifier Q>
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GLM_FUNC_DECL GLM_CONSTEXPR vec<L, bool, Q> notEqual(vec<L, T, Q> const& x, vec<L, T, Q> const& y, vec<L, T, Q> const& epsilon);
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/// Returns the component-wise comparison between two vectors in term of ULPs.
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/// True if this expression is satisfied.
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///
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/// @tparam L Integer between 1 and 4 included that qualify the dimension of the vector
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/// @tparam T Floating-point
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/// @tparam Q Value from qualifier enum
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template<length_t L, typename T, qualifier Q>
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GLM_FUNC_DECL GLM_CONSTEXPR vec<L, bool, Q> equal(vec<L, T, Q> const& x, vec<L, T, Q> const& y, int ULPs);
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/// Returns the component-wise comparison between two vectors in term of ULPs.
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/// True if this expression is satisfied.
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///
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/// @tparam L Integer between 1 and 4 included that qualify the dimension of the vector
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/// @tparam T Floating-point
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/// @tparam Q Value from qualifier enum
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template<length_t L, typename T, qualifier Q>
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GLM_FUNC_DECL GLM_CONSTEXPR vec<L, bool, Q> equal(vec<L, T, Q> const& x, vec<L, T, Q> const& y, vec<L, int, Q> const& ULPs);
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/// Returns the component-wise comparison between two vectors in term of ULPs.
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/// True if this expression is not satisfied.
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///
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/// @tparam L Integer between 1 and 4 included that qualify the dimension of the vector
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/// @tparam T Floating-point
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/// @tparam Q Value from qualifier enum
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template<length_t L, typename T, qualifier Q>
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GLM_FUNC_DECL GLM_CONSTEXPR vec<L, bool, Q> notEqual(vec<L, T, Q> const& x, vec<L, T, Q> const& y, int ULPs);
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/// Returns the component-wise comparison between two vectors in term of ULPs.
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/// True if this expression is not satisfied.
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///
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/// @tparam L Integer between 1 and 4 included that qualify the dimension of the vector
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/// @tparam T Floating-point
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/// @tparam Q Value from qualifier enum
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template<length_t L, typename T, qualifier Q>
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GLM_FUNC_DECL GLM_CONSTEXPR vec<L, bool, Q> notEqual(vec<L, T, Q> const& x, vec<L, T, Q> const& y, vec<L, int, Q> const& ULPs);
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/// @}
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}//namespace glm
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@ -27,4 +27,46 @@ namespace glm
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{
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return greaterThan(abs(x - y), Epsilon);
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}
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template<length_t L, typename T, qualifier Q>
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GLM_FUNC_QUALIFIER GLM_CONSTEXPR vec<L, bool, Q> equal(vec<L, T, Q> const& x, vec<L, T, Q> const& y, int MaxULPs)
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{
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return equal(x, y, vec<L, int, Q>(MaxULPs));
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}
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template<length_t L, typename T, qualifier Q>
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GLM_FUNC_QUALIFIER GLM_CONSTEXPR vec<L, bool, Q> equal(vec<L, T, Q> const& x, vec<L, T, Q> const& y, vec<L, int, Q> const& MaxULPs)
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{
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vec<L, bool, Q> Result;
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for(length_t i = 0; i < L; ++i)
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{
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detail::float_t const a(x[i]);
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detail::float_t const b(y[i]);
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// Different signs means they do not match.
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if(a.negative() != b.negative())
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{
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// Check for equality to make sure +0==-0
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return a.mantissa() == b.mantissa() && a.exponent() == b.exponent();
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}
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// Find the difference in ULPs.
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int const DiffULPs = abs(a.i - b.i);
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Result[i] = DiffULPs <= MaxULPs;
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}
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return Result;
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}
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template<length_t L, typename T, qualifier Q>
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GLM_FUNC_QUALIFIER GLM_CONSTEXPR vec<L, bool, Q> notEqual(vec<L, T, Q> const& x, vec<L, T, Q> const& y, int MaxULPs)
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{
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return !equal(x, y, MaxULPs);
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}
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template<length_t L, typename T, qualifier Q>
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GLM_FUNC_QUALIFIER GLM_CONSTEXPR vec<L, bool, Q> notEqual(vec<L, T, Q> const& x, vec<L, T, Q> const& y, vec<L, int, Q> const& MaxULPs)
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{
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return !equal(x, y, MaxULPs);
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}
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}//namespace glm
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