Added Hash for Vec2 Unordered_Map

include/Engine/Rendering/Util/UnorderedMapVec2.h

@@ -0,0 +1,23 @@
+#ifndef UnorderedMapVec2_h__
+#define UnorderedMapVec2_h__
+
+#include <functional>
+#include <boost/functional/hash.hpp>
+#include <glm/vec2.hpp>
+
+template<>
+struct std::hash<glm::vec2>
+{
+    inline std::size_t operator()(const glm::vec2 &v) const
+    {  
+        return boost::hash<float>()(v.x) ^ boost::hash<float>()(v.y);
+    }
+
+    inline bool operator()(const glm::vec2& a, const glm::vec2& b)const
+    {
+        return a.x == b.x && a.y == b.y;
+    }
+
+};
+
+#endif