added further fixes, and upgrades

TSE_Math/src/Vector3.hpp

@@ -1,6 +1,9 @@
 #pragma once
 
 #include "Types.hpp"
+#include <functional>
+#include <cstddef>
+#include "MathF.hpp"
 
 namespace TSE
 {
@@ -145,3 +148,22 @@ namespace TSE
 
     };
 } // namespace TSE
+
+
+namespace std
+{
+    template<>
+    struct hash<TSE::Vector3>
+    {
+        size_t operator()(const TSE::Vector3& v) const noexcept
+        {
+            size_t h1 = std::hash<float>{}(v.x);
+            size_t h2 = std::hash<float>{}(v.y);
+            size_t h3 = std::hash<float>{}(v.z);
+            size_t hash = h1;
+            hash ^= h2 + TSE::TSE_HASH_GOLDEN_RATIO_32 + (hash << 6) + (hash >> 2);
+            hash ^= h3 + TSE::TSE_HASH_GOLDEN_RATIO_32 + (hash << 6) + (hash >> 2);
+            return hash;
+        }
+    };
+}