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Add math::dual weak comparison operators & some transcendental functions

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This commit is contained in:
Nikita Lisitsa 2025-08-31 14:46:20 +03:00
parent 2cce0082cf
commit 78ea54ac2d
1 changed files with 45 additions and 0 deletions
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45
libs/math/include/psemek/math/dual.hpp
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@ -3,6 +3,7 @@
#include <psemek/math/vector.hpp>
#include <iostream>
#include <compare>
namespace psemek::math
{
@ -148,6 +149,50 @@ namespace psemek::math
return v * inverse(d);
}
// Exists mostly to make max/min/clamp/etc work
template <typename T, std::size_t N>
std::partial_ordering operator <=> (dual<T, N> const & d1, dual<T, N> const & d2)
{
return d1.scalar <=> d2.scalar;
}
template <typename T, std::size_t N>
dual<T, N> abs(dual<T, N> const & d)
{
return d.scalar > T{0} ? d : -d;
}
template <typename T, std::size_t N>
dual<T, N> exp(dual<T, N> const & d)
{
auto e = std::exp(d.scalar);
return {e, e * d.delta};
}
template <typename T, std::size_t N>
dual<T, N> log(dual<T, N> const & d)
{
return {std::log(d.scalar), d.delta / d.scalar};
}
template <typename T, std::size_t N>
dual<T, N> sin(dual<T, N> const & d)
{
return {std::sin(d.scalar), std::cos(d.scalar) * d.delta};
}
template <typename T, std::size_t N>
dual<T, N> cos(dual<T, N> const & d)
{
return {std::cos(d.scalar), - std::sin(d.scalar) * d.delta};
}
template <typename T, std::size_t N>
dual<T, N> pow(dual<T, N> const & d1, dual<T, N> const & d2)
{
return exp(log(d1) * d2);
}
template <typename T, std::size_t N>
std::ostream & operator << (std::ostream & os, dual<T, N> const & d)
{