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Adds hash support for Vector2, Vector3, and Vector4

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Implements `std::hash` specialization for `omath::Vector2`, `omath::Vector3`, and `omath::Vector4` with float components.

This enables usage of these vector types as keys in hash-based containers, such as `std::unordered_map` and `std::unordered_set`.
This commit is contained in:
Orange
2025-10-14 13:00:28 +03:00
parent 568883ff1c
commit 9f2f619a21
3 changed files with 32 additions and 0 deletions
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15
include/omath/linear_algebra/vector2.hpp
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@@ -234,6 +234,21 @@ namespace omath
}; };
} // namespace omath } // namespace omath
template<> struct std::hash<omath::Vector2<float>>
{
[[nodiscard]]
std::size_t operator()(const omath::Vector2<float>& vec) const noexcept
{
std::size_t hash = 0;
constexpr std::hash<float> hasher;
hash ^= hasher(vec.x) + 0x9e3779b9 + (hash << 6) + (hash >> 2);
hash ^= hasher(vec.y) + 0x9e3779b9 + (hash << 6) + (hash >> 2);
return hash;
}
};
template<class Type> template<class Type>
struct std::formatter<omath::Vector2<Type>> // NOLINT(*-dcl58-cpp) struct std::formatter<omath::Vector2<Type>> // NOLINT(*-dcl58-cpp)
{ {

1
include/omath/linear_algebra/vector3.hpp
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@@ -273,6 +273,7 @@ namespace omath
template<> struct std::hash<omath::Vector3<float>> template<> struct std::hash<omath::Vector3<float>>
{ {
[[nodiscard]]
std::size_t operator()(const omath::Vector3<float>& vec) const noexcept std::size_t operator()(const omath::Vector3<float>& vec) const noexcept
{ {
std::size_t hash = 0; std::size_t hash = 0;

16
include/omath/linear_algebra/vector4.hpp
View File

@@ -202,6 +202,22 @@ namespace omath
}; };
} // namespace omath } // namespace omath
template<> struct std::hash<omath::Vector4<float>>
{
[[nodiscard]]
std::size_t operator()(const omath::Vector4<float>& vec) const noexcept
{
std::size_t hash = 0;
constexpr std::hash<float> hasher;
hash ^= hasher(vec.x) + 0x9e3779b9 + (hash << 6) + (hash >> 2);
hash ^= hasher(vec.y) + 0x9e3779b9 + (hash << 6) + (hash >> 2);
hash ^= hasher(vec.z) + 0x9e3779b9 + (hash << 6) + (hash >> 2);
hash ^= hasher(vec.w) + 0x9e3779b9 + (hash << 6) + (hash >> 2);
return hash;
}
};
template<class Type> template<class Type>
struct std::formatter<omath::Vector4<Type>> // NOLINT(*-dcl58-cpp) struct std::formatter<omath::Vector4<Type>> // NOLINT(*-dcl58-cpp)
{ {