From 966cd973c660e76feeac8547a8314960f389e967 Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Wed, 25 Oct 2023 18:35:59 +0200
Subject: [PATCH] Add `GetHash` to various math/core types

#1802
---
 Source/Engine/Core/Math/Vector2.h | 6 ++++++
 Source/Engine/Core/Math/Vector3.h | 6 ++++++
 Source/Engine/Core/Math/Vector4.h | 6 ++++++
 3 files changed, 18 insertions(+)

diff --git a/Source/Engine/Core/Math/Vector2.h b/Source/Engine/Core/Math/Vector2.h
index 83deb009a..cea03ec10 100644
--- a/Source/Engine/Core/Math/Vector2.h
+++ b/Source/Engine/Core/Math/Vector2.h
@@ -646,6 +646,12 @@ inline Vector2Base<T> operator/(typename TOtherFloat<T>::Type a, const Vector2Ba
     return Vector2Base<T>(a) / b;
 }
 
+template<typename T>
+inline uint32 GetHash(const Vector2Base<T>& key)
+{
+    return (*(uint32*)&key.X * 397) ^ *(uint32*)&key.Y;
+}
+
 namespace Math
 {
     template<typename T>
diff --git a/Source/Engine/Core/Math/Vector3.h b/Source/Engine/Core/Math/Vector3.h
index c0ebdf01d..01b55e9bd 100644
--- a/Source/Engine/Core/Math/Vector3.h
+++ b/Source/Engine/Core/Math/Vector3.h
@@ -977,6 +977,12 @@ inline Vector3Base<T> operator/(typename TOtherFloat<T>::Type a, const Vector3Ba
     return Vector3Base<T>(a) / b;
 }
 
+template<typename T>
+inline uint32 GetHash(const Vector3Base<T>& key)
+{
+    return (((*(uint32*)&key.X * 397) ^ *(uint32*)&key.Y) * 397) ^ *(uint32*)&key.Z;
+}
+
 namespace Math
 {
     template<typename T>
diff --git a/Source/Engine/Core/Math/Vector4.h b/Source/Engine/Core/Math/Vector4.h
index 5c7b24c4a..1cc6d4db8 100644
--- a/Source/Engine/Core/Math/Vector4.h
+++ b/Source/Engine/Core/Math/Vector4.h
@@ -552,6 +552,12 @@ inline Vector4Base<T> operator/(typename TOtherFloat<T>::Type a, const Vector4Ba
     return Vector4Base<T>(a) / b;
 }
 
+template<typename T>
+inline uint32 GetHash(const Vector4Base<T>& key)
+{
+    return (((((*(uint32*)&key.X * 397) ^ *(uint32*)&key.Y) * 397) ^ *(uint32*)&key.Z) * 397) ^*(uint32*)&key.W;
+}
+
 namespace Math
 {
     template<typename T>