diff --git a/res/shaders/MeshletBasePass.slang b/res/shaders/MeshletBasePass.slang
index 7cf3122..825d6b5 100644
--- a/res/shaders/MeshletBasePass.slang
+++ b/res/shaders/MeshletBasePass.slang
@@ -51,7 +51,7 @@ void taskMain(
 		{
 			uint m = mesh.meshletOffset + i;
 			MeshletDescription meshlet = pScene.meshletInfos[m];
-			if(meshlet.boundingBox.insideFrustum(localToClip, viewFrustum))
+			//if(meshlet.boundingBox.insideFrustum(localToClip, viewFrustum))
 			{
 				uint index;
 				InterlockedAdd(head, 1, index);
diff --git a/res/shaders/lib/Scene.slang b/res/shaders/lib/Scene.slang
index c599217..847c428 100644
--- a/res/shaders/lib/Scene.slang
+++ b/res/shaders/lib/Scene.slang
@@ -20,8 +20,8 @@ struct MeshData
     uint32_t pad0[3];
 };
 
-static const uint MAX_VERTICES = 256;
-static const uint MAX_PRIMITIVES = 256;
+static const uint MAX_VERTICES = 64;
+static const uint MAX_PRIMITIVES = 126;
 static const uint TASK_GROUP_SIZE = 128;
 static const uint MESH_GROUP_SIZE = 32;
 static const uint MAX_MESHLETS_PER_MESH = 512;
diff --git a/src/Engine/Component/Component.h b/src/Engine/Component/Component.h
index 2e0fff2..8383928 100644
--- a/src/Engine/Component/Component.h
+++ b/src/Engine/Component/Component.h
@@ -10,6 +10,11 @@ template<>
 struct Dependencies<>
 {
     int x;
+    template<typename... Right>
+    Dependencies<Right...> operator|(const Dependencies<Right...>& other)
+    {
+        return Dependencies<Right...>();
+    }
 };
 template<typename This, typename... Rest>
 struct Dependencies<This, Rest...> : public Dependencies<Rest...>
@@ -24,25 +29,31 @@ struct Dependencies<This, Rest...> : public Dependencies<Rest...>
 
 namespace Component
 {
-template<typename Comp>
-static int accessComponent(Comp& comp);
+    template<typename Comp>
+    Comp& getComponent();
 }
+
 template<typename Comp>
 concept has_dependencies = requires(Comp) { Comp::dependencies; };
 
 #define REQUIRE_COMPONENT(x) \
     private: \
-    x& get##x() { return *tl_##x; } \
-    const x& get##x() const { return *tl_##x; }; \
+    x& get##x() { return getComponent<##x>(); } \
+    const x& get##x() const { return getComponent<##x>(); } \
     public: \
     constexpr static Dependencies<x> dependencies = {};
 
 #define DECLARE_COMPONENT(x) \
-    thread_local extern x* tl_##x; \
+    void accessComponent(x& val); \
     template<> \
-    int accessComponent<x>(x& val) { tl_##x = &val; return 0; }
+    x& getComponent<x>();
+    
 
 #define DEFINE_COMPONENT(x) \
-    thread_local x* Seele::Component::tl_##x;
+    thread_local x* tl_##x = nullptr; \
+    void Seele::Component::accessComponent(x& ref) { tl_##x = &ref; } \
+    template<> \
+    x& Seele::Component::getComponent<x>() { return *tl_##x; }
+
 
 } // namespace Seele
diff --git a/src/Engine/Component/Transform.cpp b/src/Engine/Component/Transform.cpp
index 35476ed..71dc320 100644
--- a/src/Engine/Component/Transform.cpp
+++ b/src/Engine/Component/Transform.cpp
@@ -2,7 +2,7 @@
 
 using namespace Seele::Component;
 
-DEFINE_COMPONENT(Transform)
+DEFINE_COMPONENT(Transform);
 
 void Transform::setPosition(Vector pos)
 {
diff --git a/src/Engine/Containers/CMakeLists.txt b/src/Engine/Containers/CMakeLists.txt
index fe109a1..75715e1 100644
--- a/src/Engine/Containers/CMakeLists.txt
+++ b/src/Engine/Containers/CMakeLists.txt
@@ -3,7 +3,9 @@ target_sources(Engine
 		Array.h
 		List.h
 		Map.h
-		Pair.h)
+		Pair.h
+		Set.h
+		Tree.h)
 
 target_sources(Engine
 	PUBLIC FILE_SET HEADERS
@@ -11,4 +13,6 @@ target_sources(Engine
 			Array.h
 			List.h
 			Map.h
-			Pair.h)
\ No newline at end of file
+			Pair.h
+			Set.h
+			Tree.h)
\ No newline at end of file
diff --git a/src/Engine/Containers/Map.h b/src/Engine/Containers/Map.h
index 0035ae8..fec7562 100644
--- a/src/Engine/Containers/Map.h
+++ b/src/Engine/Containers/Map.h
@@ -2,416 +2,101 @@
 #include <utility>
 #include "Array.h"
 #include "Pair.h"
+#include "Tree.h"
 #include "Serialization/Serialization.h"
 
 namespace Seele
 {
+template<typename KeyType, typename PairType>
+struct _KeyFun
+{
+    const KeyType& operator()(const PairType& pair) const
+    {
+        return pair.key;
+    }
+};
 template <typename K, 
           typename V, 
           typename Compare = std::less<K>,
-          typename Allocator = std::pmr::polymorphic_allocator<Pair<const K,V>>>
-struct Map
+          typename Allocator = std::pmr::polymorphic_allocator<Pair<const K, V>>>
+struct Map : public Tree<K, Pair<K, V>, _KeyFun<K, Pair<K, V>>, Compare, Allocator>
 {
-private:
-    struct Node
-    {
-        Node* leftChild;
-        Node* rightChild;
-        Pair<K, V> pair;
-        Node()
-            : leftChild(nullptr)
-            , rightChild(nullptr)
-            , pair()
-        {
-        }
-        Node(const Node& other) = default;
-        Node(Node&& other) = default;
-        Node& operator=(const Node& other) = default;
-        Node& operator=(Node&& other) = default;
-        Node(K key)
-            : leftChild(nullptr)
-            , rightChild(nullptr)
-            , pair(std::move(key))
-        {
-        }
-        ~Node()
-        {
-        }
-    };
-    using NodeAlloc = std::allocator_traits<Allocator>::template rebind_alloc<Node>;
-public:
-    template<typename PairType>
-    class IteratorBase
-    {
-    public:
-        using iterator_category = std::bidirectional_iterator_tag;
-        using value_type = PairType;
-        using difference_type = std::ptrdiff_t;
-        using reference = PairType&;
-        using pointer = PairType*;
-
-        constexpr IteratorBase(Node* x = nullptr, Array<Node*> &&beginIt = Array<Node*>())
-            : node(x), traversal(std::move(beginIt))
-        {
-        }
-        constexpr IteratorBase(const IteratorBase &i)
-            : node(i.node), traversal(i.traversal)
-        {
-        }
-        constexpr IteratorBase(IteratorBase&& i)
-            : node(std::move(i.node)), traversal(std::move(i.traversal))
-        {
-        }
-        constexpr IteratorBase& operator=(const IteratorBase& other)
-        {
-            if(this != &other)
-            {
-                node = other.node;
-                traversal = other.traversal;
-            }
-            return *this;
-        }
-        constexpr IteratorBase& operator=(IteratorBase&& other)
-        {
-            if(this != &other)
-            {
-                node = std::move(other.node);
-                traversal = std::move(other.traversal);
-            }
-            return *this;
-        }
-        constexpr reference operator*() const
-        {
-            return node->pair;
-        }
-        constexpr pointer operator->() const
-        {
-            return &(node->pair);
-        }
-        constexpr bool operator!=(const IteratorBase &other)
-        {
-            return node != other.node;
-        }
-        constexpr bool operator==(const IteratorBase &other)
-        {
-            return node == other.node;
-        }
-        constexpr IteratorBase &operator++()
-        {
-            node = node->rightChild;
-            while (node != nullptr
-                && node->leftChild != nullptr)
-            {
-                traversal.add(node);
-                node = node->leftChild;
-            }
-            if (node == nullptr 
-                && traversal.size() > 0)
-            {
-                node = traversal.back();
-                traversal.pop();
-            }
-            return *this;
-        }
-        constexpr IteratorBase &operator--()
-        {
-            node = node->leftChild;
-            while (node != nullptr 
-                && node->rightChild != nullptr)
-            {
-                traversal.add(node);
-                node = node->rightchild;
-            }
-            if (node == nullptr 
-                && traversal.size() > 0)
-            {
-                node = traversal.back();
-                traversal.pop();
-            }
-            return *this;
-        }
-        constexpr IteratorBase operator--(int)
-        {
-            IteratorBase tmp(*this);
-            --*this;
-            return tmp;
-        }
-        constexpr IteratorBase operator++(int)
-        {
-            IteratorBase tmp(*this);
-            ++*this;
-            return tmp;
-        }
-
-    private:
-        Node* node;
-        Array<Node*> traversal;
-    };
-    using Iterator = IteratorBase<Pair<K,V>>;
-    using ConstIterator = IteratorBase<const Pair<K,V>>;
-    
-    using key_type = K;
+    using Super = Tree<K, Pair<K, V>, _KeyFun<K, Pair<K, V>>, Compare, Allocator>;
+    using key_type = Super::key_type;
     using mapped_type = V;
-    using value_type = Pair<K,V>;
-    using allocator_type = Allocator;
-    using size_type = std::size_t;
-    using difference_type = std::ptrdiff_t;
-    using reference = value_type&;
-    using const_reference = const value_type&;
-    using pointer = std::allocator_traits<Allocator>::pointer;
-    using const_pointer = std::allocator_traits<Allocator>::const_pointer;
+    using value_type = Super::value_type;
+
+    using allocator_type = Super::allocator_type;
+    using size_type = Super::size_type;
+    using difference_type = Super::difference_type;
+    using reference = Super::reference;
+    using const_reference = Super::reference;
+    using pointer = Super::pointer;
+    using const_pointer = Super::const_pointer;
+
+    using iterator = Super::iterator;
+    using const_iterator = Super::const_iterator;
+    using reverse_iterator = Super::reverse_iterator;
+    using const_reverse_iterator = Super::const_reverse_iterator;
 
-    using iterator = Iterator;
-    using const_iterator = ConstIterator;
-    using reverse_iterator = std::reverse_iterator<iterator>;
-    using const_reverse_iterator = std::reverse_iterator<const_iterator>;
-    
     constexpr Map() noexcept
-        : root(nullptr)
-        , beginIt(nullptr)
-        , endIt(nullptr)
-        , iteratorsDirty(true)
-        , _size(0)
-        , comp(Compare())
+        : Super()
     {
     }
     constexpr explicit Map(const Compare& comp, const Allocator& alloc = Allocator()) noexcept(noexcept(Allocator()))
-        : alloc(alloc)
-        , root(nullptr)
-        , beginIt(nullptr)
-        , endIt(nullptr)
-        , iteratorsDirty(true)
-        , _size(0)
-        , comp(comp)
+        : Super(comp, alloc)
     {
     }
     constexpr explicit Map(const Allocator& alloc) noexcept(noexcept(Compare()))
-        : alloc(alloc)
-        , root(nullptr)
-        , beginIt(nullptr)
-        , endIt(nullptr)
-        , iteratorsDirty(true)
-        , _size(0)
-        , comp(Compare())
+        : Super(alloc)
     {
     }
-    constexpr Map(const Map& other)
-        : alloc(other.alloc)
-        , root(nullptr)
-        , iteratorsDirty(true)
-        , _size(0)
-        , comp(other.comp)
-    {
-        for(const auto& [key, val] : other)
-        {
-            this->operator[](key) = val;
-        }
-    }
-    constexpr Map(Map&& other) noexcept
-        : alloc(std::move(other.alloc))
-        , root(std::move(other.root))
-        , iteratorsDirty(true)
-        , _size(std::move(other._size))
-        , comp(std::move(other.comp))
-    {
-    }
-    constexpr ~Map() noexcept
-    {
-        clear();
-    }
-    constexpr Map& operator=(const Map& other)
-    {
-        if(this != &other)
-        {
-            alloc = other.alloc;
-            comp = other.comp;
-            root = nullptr;
-            _size = 0;
-            for(const auto& [key, val] : other)
-            {
-                this->operator[](key) = val;
-            }
-            markIteratorsDirty();
-        }
-        return *this;
-    }
-    constexpr Map& operator=(Map&& other)
-    {
-        if(this != &other)
-        {
-            alloc = std::move(other.alloc);
-            root = std::move(other.root);
-            _size = std::move(other._size);
-            comp = std::move(other.comp);
-            markIteratorsDirty();
-        }
-        return *this;
-    }
     constexpr mapped_type& operator[](const key_type& key)
     {
-        root = splay(root, key);
-        if (root == nullptr || !equal(root->pair.key, key))
-        {
-            root = insert(root, key);
-            _size++;
-        }
-        markIteratorsDirty();
-        return root->pair.value;
+        auto [it, inserted] = Super::insert(Pair<K, V>(key, V()));
+        return it->value;
     }
     constexpr const mapped_type& operator[](const key_type& key) const
     {
-        Node* it = root;
-        while (!equal(it->pair.key, key))
-        {
-            if (comp(key, it->pair.key))
-            {
-                it = it->leftChild;
-            }
-            else
-            {
-                it = it->rightChild;
-            }
-        }
-        return it->pair.value;
+        return Super::find(key)->value;
     }
     constexpr mapped_type& at(const key_type& key)
     {
-        root = splay(root, key);
-        if (root == nullptr || !equal(root->pair.key, key))
+        iterator elem = Super::find(key);
+        if (elem == Super::end())
         {
             throw std::logic_error("Key not found");
         }
-        markIteratorsDirty();
-        return root->pair.value;
+        return elem->value;
     }
-    constexpr mapped_type& at(key_type&& key)
-    {
-        root = splay(root, std::move(key));
-        if (root == nullptr || !equal(root->pair.key, key))
-        {
-            throw std::logic_error("Key not found");
-        }
-        markIteratorsDirty();
-        return root->pair.value;
-    }
-    
     constexpr const mapped_type& at(const key_type& key) const
     {
-        Node* it = root;
-        while (!equal(it->pair.key, key))
-        {
-            if (comp(key, it->pair.key))
-            {
-                it = it->leftChild;
-            }
-            else
-            {
-                it = it->rightChild;
-            }
-        }
-        return it->pair.value;
+        return Super::find(key)->value;
     }
     constexpr iterator find(const key_type& key)
     {
-        root = splay(root, key);
-        refreshIterators();
-        if (root == nullptr || !equal(root->pair.key, key))
-        {
-            return endIt;
-        }
-        return iterator(root);
-    }
-    constexpr iterator find(key_type&& key)
-    {
-        root = splay(root, std::move(key));
-        refreshIterators();
-        if (root == nullptr || !equal(root->pair.key, key))
-        {
-            return endIt;
-        }
-        return iterator(root);
+        return Super::find(key);
     }
     constexpr iterator erase(const key_type& key)
     {
-        root = remove(root, key);
-        refreshIterators();
-        assert(root != nullptr || _size == 0);
-        return iterator(root);	
-    }
-    constexpr iterator erase(key_type&& key)
-    {
-        root = remove(root, std::move(key));
-        refreshIterators();
-        return iterator(root);
-    }
-    constexpr void clear()
-    {
-        while(_size > 0)
-        {
-            root = remove(root, root->pair.key);
-        }
-        root = nullptr;
-        markIteratorsDirty();
+        return Super::remove(key);	
     }
     constexpr bool exists(const key_type& key)
     {
-        return find(key) != endIt;
-    }
-    constexpr bool exists(key_type&& key)
-    {
-        return find(std::move(key)) != endIt;
+        return Super::find(key) != Super::end();
     }
     constexpr bool contains(const key_type& key)
     {
         return exists(key);
     }
-    constexpr bool contains(key_type&& key)
+    constexpr Pair<iterator, bool> insert(const value_type& val)
     {
-        return exists(key);
-    }
-    constexpr iterator begin()
-    {
-        if(iteratorsDirty)
-        {
-            refreshIterators();
-        }
-        return beginIt;
-    }
-    constexpr iterator end()
-    {
-        if(iteratorsDirty)
-        {
-            refreshIterators();
-        }
-        return endIt;
-    }
-    constexpr iterator begin() const
-    {
-        if(iteratorsDirty)
-        {
-            return calcBeginIterator();
-        }
-        return beginIt;
-    }
-    constexpr iterator end() const
-    {
-        if(iteratorsDirty)
-        {
-            return calcEndIterator();
-        }
-        return endIt;
-    }
-    constexpr bool empty() const
-    {
-        return _size == 0;
-    }
-    constexpr size_type size() const
-    {
-        return _size;
+        return Super::insert(val);
     }
     void save(ArchiveBuffer& buffer) const
     {
-        buffer.writeBytes(&_size, sizeof(uint64));
+        size_t s = Super::size();
+        buffer.writeBytes(&s, sizeof(uint64));
         for(const auto& [k, v] : *this)
         {
             Serialization::save(buffer, k);
@@ -431,189 +116,5 @@ public:
             this->operator[](std::move(k)) = std::move(v);
         }
     }
-private:
-    void verifyTree()
-    {
-        size_t numElems = 0;
-        for (const auto& it : *this)
-        {
-            numElems++;
-        }
-        assert(numElems == _size);
-    }
-    void markIteratorsDirty()
-    {
-        iteratorsDirty = true;
-    }
-    void refreshIterators()
-    {
-        beginIt = calcBeginIterator();
-        endIt = calcEndIterator();
-        iteratorsDirty = false;
-    }
-    constexpr Iterator calcBeginIterator() const
-    {
-        Node* begin = root;
-        Array<Node*> beginTraversal;
-        while (begin != nullptr)
-        {
-            beginTraversal.add(begin);
-            begin = begin->leftChild;
-        }
-        if(!beginTraversal.empty())
-        {
-            begin = beginTraversal.back();
-            beginTraversal.pop();
-        }
-        return Iterator(begin, std::move(beginTraversal));
-    }
-    constexpr Iterator calcEndIterator() const
-    {
-        Node* endIndex = root;
-        Array<Node*> endTraversal;
-        while (endIndex != nullptr)
-        {
-            endTraversal.add(endIndex);
-            endIndex = endIndex->rightChild;
-        }
-        return Iterator(endIndex, std::move(endTraversal));
-    }
-    NodeAlloc alloc;
-    Node* root;
-    Iterator beginIt;
-    Iterator endIt;
-    bool iteratorsDirty;
-    size_type _size;
-    Compare comp;
-    Node* rotateLeft(Node* x)
-    {
-        Node* y = x->rightChild;
-        x->rightChild = y->leftChild;
-        y->leftChild = x;
-        return y;
-    }
-    Node* rotateRight(Node* x)
-    {
-        Node* y = x->leftChild;
-        x->leftChild = y->rightChild;
-        y->rightChild = x;
-        return y;
-    }
-    template<class KeyType>
-    Node* insert(Node* r, KeyType&& key)
-    {
-        if (r == nullptr)
-        {
-            root = alloc.allocate(1);
-            std::allocator_traits<NodeAlloc>::construct(alloc, root, std::forward<KeyType>(key));
-            return root;
-        }
-        r = splay(r, key);
-
-        if (equal(r->pair.key, key))
-            return r;
-
-        Node *newNode = alloc.allocate(1);
-        std::allocator_traits<NodeAlloc>::construct(alloc, newNode, std::forward<KeyType>(key));
-
-        if (comp(newNode->pair.key, r->pair.key))
-        {
-            newNode->rightChild = r;
-            newNode->leftChild = r->leftChild;
-            r->leftChild = nullptr;
-        }
-        else
-        {
-            newNode->leftChild = r;
-            newNode->rightChild = r->rightChild;
-            r->rightChild = nullptr;
-        }
-        return newNode;
-    }
-    template<class KeyType>
-    Node* remove(Node* r, KeyType&& key)
-    {
-        Node* temp;
-        if (r == nullptr)
-            return nullptr;
-
-        r = splay(r, key);
-
-        if (!equal(r->pair.key, key))
-            return r;
-
-        if (r->leftChild == nullptr)
-        {
-            temp = r;
-            r = r->rightChild;
-        }
-        else
-        {
-            temp = r;
-
-            r = splay(r->leftChild, key);
-            r->rightChild = temp->rightChild;
-        }
-        std::allocator_traits<NodeAlloc>::destroy(alloc, temp);
-        alloc.deallocate(temp, 1);
-        _size--;
-        return r;
-    }
-    template<class KeyType>
-    Node* splay(Node* r, KeyType&& key)
-    {
-        if (r == nullptr || equal(r->pair.key, key))
-        {
-            return r;
-        }
-        if (comp(key, r->pair.key))
-        {
-            if (r->leftChild == nullptr)
-                return r;
-
-            if (comp(key, r->leftChild->pair.key))
-            {
-                r->leftChild->leftChild = splay(r->leftChild->leftChild, key);
-
-                r = rotateRight(r);
-            }
-            else if (comp(r->leftChild->pair.key, key))
-            {
-                r->leftChild->rightChild = splay(r->leftChild->rightChild, key);
-
-                if (r->leftChild->rightChild != nullptr)
-                {
-                    r->leftChild = rotateLeft(r->leftChild);
-                }
-            }
-            return (r->leftChild == nullptr) ? r : rotateRight(r);
-        }
-        else
-        {
-            if (r->rightChild == nullptr)
-                return r;
-
-            if (comp(key, r->rightChild->pair.key))
-            {
-                r->rightChild->leftChild = splay(r->rightChild->leftChild, key);
-
-                if (r->rightChild->leftChild != nullptr)
-                {
-                    r->rightChild = rotateRight(r->rightChild);
-                }
-            }
-            else if (comp(r->rightChild->pair.key, key))
-            {
-                r->rightChild->rightChild = splay(r->rightChild->rightChild, key);
-
-                r = rotateLeft(r);
-            }
-            return (r->rightChild == nullptr) ? r : rotateLeft(r);
-        }
-    }
-    bool equal(const key_type& a, const key_type& b) const
-    {
-        return !comp(a, b) && !comp(b, a);
-    }
 };
 } // namespace Seele
diff --git a/src/Engine/Containers/Pair.h b/src/Engine/Containers/Pair.h
index 3eb555b..c804c11 100644
--- a/src/Engine/Containers/Pair.h
+++ b/src/Engine/Containers/Pair.h
@@ -6,20 +6,21 @@ template <typename K, typename V>
 struct Pair
 {
 public:
-    Pair()
+    constexpr Pair()
         : key(K()), value(V())
     {}
+    constexpr Pair(const K & key, const V & value)
+        : key(key), value(value)
+    {}
+    template<class U1 = K, class U2 = V>
+    constexpr Pair(U1&& x, U2&& y)
+        : key(std::forward<U1>(x))
+        , value(std::forward<U2>(y))
+    {
+    }
     Pair(const Pair& other) = default;
     Pair(Pair&& other) = default;
     ~Pair(){}
-    template<class KeyType>
-    explicit Pair(KeyType&& key)
-        : key(std::forward<KeyType>(key)), value(V())
-    {}
-    template<class KeyType, class ValueType>
-    explicit Pair(KeyType&& key, ValueType&& value)
-        : key(std::forward<KeyType>(key)), value(std::forward<ValueType>(value))
-    {}
     Pair& operator=(const Pair& other) = default;
     Pair& operator=(Pair&& other) = default;
     constexpr friend bool operator<(const Pair& left, const Pair& right)
diff --git a/src/Engine/Containers/Set.h b/src/Engine/Containers/Set.h
new file mode 100644
index 0000000..7031b88
--- /dev/null
+++ b/src/Engine/Containers/Set.h
@@ -0,0 +1,46 @@
+#pragma once
+#include <utility>
+#include "Array.h"
+#include "Tree.h"
+
+namespace Seele
+{
+template<class Key, class Compare = std::less<Key>, class Allocator = std::pmr::polymorphic_allocator<Key>>
+class Set : public Tree<Key, Key, std::identity, Compare, Allocator>
+{
+public:
+    using Super = Tree<Key, Key, std::identity, Compare, Allocator>;
+    using key_type = Key;
+    using value_type = Key;
+    using node_type = Super::Node;
+    using allocator_type = Super::allocator_type;
+    using size_type = Super::size_type;
+    using difference_type = Super::difference_type;
+    using reference = value_type&;
+    using const_reference = const value_type&;
+    using pointer = std::allocator_traits<Allocator>::pointer;
+    using const_pointer = std::allocator_traits<Allocator>::const_pointer;
+
+    using iterator = Super::iterator;
+    using const_iterator = Super::const_iterator;
+    using reverse_iterator = Super::reverse_iterator;
+    using const_reverse_iterator = Super::const_reverse_iterator;
+
+    Set()
+        : Set(Compare())
+    {
+    }
+    explicit Set(const Compare& comp, const Allocator alloc = Allocator())
+        : Super(comp, alloc)
+    {
+    }
+    explicit Set(const Allocator alloc)
+        : Super(alloc)
+    {
+    }
+    constexpr Pair<iterator, bool> insert(const value_type& value)
+    {
+        return Super::insert(value);
+    }
+};
+} // namespace Seele
\ No newline at end of file
diff --git a/src/Engine/Containers/Tree.h b/src/Engine/Containers/Tree.h
new file mode 100644
index 0000000..53221d7
--- /dev/null
+++ b/src/Engine/Containers/Tree.h
@@ -0,0 +1,510 @@
+#pragma once
+#include <memory_resource>
+#include "Pair.h"
+
+namespace Seele
+{
+template <
+    typename KeyType,
+    typename NodeData,
+    typename KeyFun,
+    typename Compare,
+    typename Allocator>
+struct Tree
+{
+protected:
+    struct Node
+    {
+        Node* leftChild;
+        Node* rightChild;
+        NodeData data;
+    };
+    using NodeAlloc = std::allocator_traits<Allocator>::template rebind_alloc<Node>;
+public:
+    template<typename IterType>
+    class IteratorBase
+    {
+    public:
+        using iterator_category = std::bidirectional_iterator_tag;
+        using value_type = IterType;
+        using difference_type = std::ptrdiff_t;
+        using reference = IterType&;
+        using pointer = IterType*;
+
+        constexpr IteratorBase(Node* x = nullptr, Array<Node*>&& beginIt = Array<Node*>())
+            : node(x), traversal(std::move(beginIt))
+        {
+        }
+        constexpr IteratorBase(const IteratorBase& i)
+            : node(i.node), traversal(i.traversal)
+        {
+        }
+        constexpr IteratorBase(IteratorBase&& i)
+            : node(std::move(i.node)), traversal(std::move(i.traversal))
+        {
+        }
+        constexpr IteratorBase& operator=(const IteratorBase& other)
+        {
+            if (this != &other)
+            {
+                node = other.node;
+                traversal = other.traversal;
+            }
+            return *this;
+        }
+        constexpr IteratorBase& operator=(IteratorBase&& other)
+        {
+            if (this != &other)
+            {
+                node = std::move(other.node);
+                traversal = std::move(other.traversal);
+            }
+            return *this;
+        }
+        constexpr reference operator*() const
+        {
+            return node->data;
+        }
+        constexpr pointer operator->() const
+        {
+            return &(node->data);
+        }
+        constexpr bool operator!=(const IteratorBase& other)
+        {
+            return node != other.node;
+        }
+        constexpr bool operator==(const IteratorBase& other)
+        {
+            return node == other.node;
+        }
+        constexpr IteratorBase& operator++()
+        {
+            node = node->rightChild;
+            while (node != nullptr
+                && node->leftChild != nullptr)
+            {
+                traversal.add(node);
+                node = node->leftChild;
+            }
+            if (node == nullptr
+                && traversal.size() > 0)
+            {
+                node = traversal.back();
+                traversal.pop();
+            }
+            return *this;
+        }
+        constexpr IteratorBase& operator--()
+        {
+            node = node->leftChild;
+            while (node != nullptr
+                && node->rightChild != nullptr)
+            {
+                traversal.add(node);
+                node = node->rightchild;
+            }
+            if (node == nullptr
+                && traversal.size() > 0)
+            {
+                node = traversal.back();
+                traversal.pop();
+            }
+            return *this;
+        }
+        constexpr IteratorBase operator--(int)
+        {
+            IteratorBase tmp(*this);
+            --*this;
+            return tmp;
+        }
+        constexpr IteratorBase operator++(int)
+        {
+            IteratorBase tmp(*this);
+            ++*this;
+            return tmp;
+        }
+        Node* getNode()
+        {
+            return node;
+        }
+    private:
+        Node* node;
+        Array<Node*> traversal;
+    };
+    using Iterator = IteratorBase<NodeData>;
+    using ConstIterator = IteratorBase<const NodeData>;
+
+    using key_type = KeyType;
+    using value_type = NodeData;
+    using allocator_type = Allocator;
+    using size_type = std::size_t;
+    using difference_type = std::ptrdiff_t;
+    using reference = value_type&;
+    using const_reference = const value_type&;
+    using pointer = std::allocator_traits<Allocator>::pointer;
+    using const_pointer = std::allocator_traits<Allocator>::const_pointer;
+
+    using iterator = Iterator;
+    using const_iterator = ConstIterator;
+    using reverse_iterator = std::reverse_iterator<iterator>;
+    using const_reverse_iterator = std::reverse_iterator<const_iterator>;
+
+    constexpr Tree() noexcept
+        : root(nullptr)
+        , beginIt(nullptr)
+        , endIt(nullptr)
+        , iteratorsDirty(true)
+        , _size(0)
+        , comp(Compare())
+    {
+    }
+    constexpr explicit Tree(const Compare& comp, const Allocator& alloc = Allocator()) noexcept(noexcept(Allocator()))
+        : alloc(alloc)
+        , root(nullptr)
+        , beginIt(nullptr)
+        , endIt(nullptr)
+        , iteratorsDirty(true)
+        , _size(0)
+        , comp(comp)
+    {
+    }
+    constexpr explicit Tree(const Allocator& alloc) noexcept(noexcept(Compare()))
+        : alloc(alloc)
+        , root(nullptr)
+        , beginIt(nullptr)
+        , endIt(nullptr)
+        , iteratorsDirty(true)
+        , _size(0)
+        , comp(Compare())
+    {
+    }
+    constexpr Tree(const Tree& other)
+        : alloc(other.alloc)
+        , root(nullptr)
+        , iteratorsDirty(true)
+        , _size()
+        , comp(other.comp)
+    {
+        std::copy(other.begin(), other.end(), begin());
+    }
+    constexpr Tree(Tree&& other) noexcept
+        : alloc(std::move(other.alloc))
+        , root(std::move(other.root))
+        , iteratorsDirty(true)
+        , _size(std::move(other._size))
+        , comp(std::move(other.comp))
+    {
+    }
+    constexpr ~Tree() noexcept
+    {
+        clear();
+    }
+    constexpr Tree& operator=(const Tree& other)
+    {
+        if (this != &other)
+        {
+            clear();
+            alloc = other.alloc;
+            comp = other.comp;
+            root = nullptr;
+            _size = 0;
+            std::copy(other.begin(), other.end(), begin());
+            markIteratorsDirty();
+        }
+        return *this;
+    }
+    constexpr Tree& operator=(Tree&& other)
+    {
+        if (this != &other)
+        {
+            clear();
+            alloc = std::move(other.alloc);
+            root = std::move(other.root);
+            _size = std::move(other._size);
+            comp = std::move(other.comp);
+            markIteratorsDirty();
+        }
+        return *this;
+    }
+    constexpr void clear()
+    {
+        while (_size > 0)
+        {
+            root = _remove(root, keyFun(root->data));
+        }
+        root = nullptr;
+        markIteratorsDirty();
+    }
+    constexpr iterator begin()
+    {
+        if (iteratorsDirty)
+        {
+            refreshIterators();
+        }
+        return beginIt;
+    }
+    constexpr iterator end()
+    {
+        if (iteratorsDirty)
+        {
+            refreshIterators();
+        }
+        return endIt;
+    }
+    constexpr iterator begin() const
+    {
+        if (iteratorsDirty)
+        {
+            return calcBeginIterator();
+        }
+        return beginIt;
+    }
+    constexpr iterator end() const
+    {
+        if (iteratorsDirty)
+        {
+            return calcEndIterator();
+        }
+        return endIt;
+    }
+    constexpr bool empty() const
+    {
+        return _size == 0;
+    }
+    constexpr size_type size() const
+    {
+        return _size;
+    }
+protected:
+    constexpr iterator find(const key_type& key)
+    {
+        root = _splay(root, key);
+        if (root == nullptr || !equal(root->data, key))
+        {
+            return end();
+        }
+        return iterator(root);
+    }
+    constexpr iterator find(const key_type& key) const
+    {
+        Node* it = root;
+        while (!equal(it->data, key))
+        {
+            if (comp(key, keyFun(it->data)))
+            {
+                it = it->leftChild;
+            }
+            else
+            {
+                it = it->rightChild;
+            }
+        }
+        return iterator(it);
+    }
+    constexpr Pair<iterator, bool> insert(const NodeData& data)
+    {
+        auto [r, inserted] = _insert(root, data);
+        root = r;
+        return Pair<iterator, bool>(iterator(root), inserted);
+    }
+    constexpr Pair<iterator, bool> insert(NodeData&& data)
+    {
+        auto [r, inserted] = _insert(root, std::move(data));
+        root = r;
+        return Pair<iterator, bool>(iterator(root), inserted);
+    }
+    constexpr iterator remove(const key_type& key)
+    {
+        root = _remove(root, key);
+        return iterator(root);
+    }
+private:
+    void verifyTree()
+    {
+        size_t numElems = 0;
+        for (const auto& it : *this)
+        {
+            numElems++;
+        }
+        assert(numElems == _size);
+    }
+    void markIteratorsDirty()
+    {
+        iteratorsDirty = true;
+    }
+    void refreshIterators()
+    {
+        beginIt = calcBeginIterator();
+        endIt = calcEndIterator();
+        iteratorsDirty = false;
+    }
+    constexpr Iterator calcBeginIterator() const
+    {
+        Node* begin = root;
+        Array<Node*> beginTraversal;
+        while (begin != nullptr)
+        {
+            beginTraversal.add(begin);
+            begin = begin->leftChild;
+        }
+        if (!beginTraversal.empty())
+        {
+            begin = beginTraversal.back();
+            beginTraversal.pop();
+        }
+        return Iterator(begin, std::move(beginTraversal));
+    }
+    constexpr Iterator calcEndIterator() const
+    {
+        Node* endIndex = root;
+        Array<Node*> endTraversal;
+        while (endIndex != nullptr)
+        {
+            endTraversal.add(endIndex);
+            endIndex = endIndex->rightChild;
+        }
+        return Iterator(endIndex, std::move(endTraversal));
+    }
+    NodeAlloc alloc;
+    Node* root;
+    Iterator beginIt;
+    Iterator endIt;
+    bool iteratorsDirty;
+    size_type _size;
+    Compare comp;
+    KeyFun keyFun = KeyFun();
+    Node* rotateLeft(Node* x)
+    {
+        Node* y = x->rightChild;
+        x->rightChild = y->leftChild;
+        y->leftChild = x;
+        return y;
+    }
+    Node* rotateRight(Node* x)
+    {
+        Node* y = x->leftChild;
+        x->leftChild = y->rightChild;
+        y->rightChild = x;
+        return y;
+    }
+    template<class NodeDataType>
+    Pair<Node*, bool> _insert(Node* r, NodeDataType&& data)
+    {
+        if (r == nullptr)
+        {
+            root = alloc.allocate(1);
+            std::allocator_traits<NodeAlloc>::construct(alloc, root, nullptr, nullptr, std::forward<NodeDataType>(data));
+            _size++;
+            return Pair<Node*, bool>(root, true);
+        }
+        r = _splay(r, keyFun(data));
+
+        if (equal(r->data, keyFun(data)))
+            return Pair<Node*, bool>(r, false);
+
+        Node* newNode = alloc.allocate(1);
+        std::allocator_traits<NodeAlloc>::construct(alloc, newNode, nullptr, nullptr, std::forward<NodeDataType>(data));
+
+        if (comp(keyFun(r->data), keyFun(newNode->data)))
+        {
+            newNode->rightChild = r;
+            newNode->leftChild = r->leftChild;
+            r->leftChild = nullptr;
+        }
+        else
+        {
+            newNode->leftChild = r;
+            newNode->rightChild = r->rightChild;
+            r->rightChild = nullptr;
+        }
+        _size++;
+        return Pair<Node*, bool>(newNode, true);
+    }
+    template<class KeyType>
+    Node* _remove(Node* r, KeyType&& key)
+    {
+        Node* temp;
+        if (r == nullptr)
+            return nullptr;
+
+        r = _splay(r, key);
+
+        if (!equal(r->data, key))
+            return r;
+
+        if (r->leftChild == nullptr)
+        {
+            temp = r;
+            r = r->rightChild;
+        }
+        else
+        {
+            temp = r;
+
+            r = _splay(r->leftChild, key);
+            r->rightChild = temp->rightChild;
+        }
+        std::allocator_traits<NodeAlloc>::destroy(alloc, temp);
+        alloc.deallocate(temp, 1);
+        _size--;
+        return r;
+    }
+    template<class KeyType>
+    Node* _splay(Node* r, KeyType&& key)
+    {
+        if (r == nullptr || equal(r->data, key))
+        {
+            return r;
+        }
+        if (comp(keyFun(r->data), key))
+        {
+            if (r->leftChild == nullptr)
+                return r;
+
+            if (comp(keyFun(r->leftChild->data), key))
+            {
+                r->leftChild->leftChild = _splay(r->leftChild->leftChild, key);
+
+                r = rotateRight(r);
+            }
+            else if (comp(keyFun(r->leftChild->data), key))
+            {
+                r->leftChild->rightChild = _splay(r->leftChild->rightChild, key);
+
+                if (r->leftChild->rightChild != nullptr)
+                {
+                    r->leftChild = rotateLeft(r->leftChild);
+                }
+            }
+            return (r->leftChild == nullptr) ? r : rotateRight(r);
+        }
+        else
+        {
+            if (r->rightChild == nullptr)
+                return r;
+
+            if (comp(keyFun(r->rightChild->data), key))
+            {
+                r->rightChild->leftChild = _splay(r->rightChild->leftChild, key);
+
+                if (r->rightChild->leftChild != nullptr)
+                {
+                    r->rightChild = rotateRight(r->rightChild);
+                }
+            }
+            else if (comp(keyFun(r->rightChild->data), key))
+            {
+                r->rightChild->rightChild = _splay(r->rightChild->rightChild, key);
+
+                r = rotateLeft(r);
+            }
+            return (r->rightChild == nullptr) ? r : rotateLeft(r);
+        }
+    }
+    template<typename KeyType>
+    bool equal(const NodeData& a, KeyType&& b) const
+    {
+        return !comp(keyFun(a), b) && !comp(b, keyFun(a));
+    }
+};
+} // namespace Seele
\ No newline at end of file
diff --git a/src/Engine/Graphics/RenderPass/BasePass.cpp b/src/Engine/Graphics/RenderPass/BasePass.cpp
index a2ea5cf..9aaaa5e 100644
--- a/src/Engine/Graphics/RenderPass/BasePass.cpp
+++ b/src/Engine/Graphics/RenderPass/BasePass.cpp
@@ -157,7 +157,6 @@ void BasePass::render()
                 command->bindDescriptor(descriptorSets);
                 if (graphics->supportMeshShading())
                 {
-                    std::cout << "Num Meshes: " << instance.meshes.size() << std::endl;
                     command->dispatch(instance.meshes.size(), 1, 1);
                 }
                 else
diff --git a/src/Engine/Graphics/StaticMeshVertexData.cpp b/src/Engine/Graphics/StaticMeshVertexData.cpp
index 1941ed2..2883293 100644
--- a/src/Engine/Graphics/StaticMeshVertexData.cpp
+++ b/src/Engine/Graphics/StaticMeshVertexData.cpp
@@ -113,10 +113,10 @@ void StaticMeshVertexData::deserializeMesh(MeshId id, ArchiveBuffer& buffer)
     loadColors(id, col);
 }
 
-void StaticMeshVertexData::init(Gfx::PGraphics graphics)
+void StaticMeshVertexData::init(Gfx::PGraphics _graphics)
 {
-    VertexData::init(graphics);
-    descriptorLayout = graphics->createDescriptorLayout("StaticMeshDescriptorLayout");
+    VertexData::init(_graphics);
+    descriptorLayout = _graphics->createDescriptorLayout("StaticMeshDescriptorLayout");
     descriptorLayout->addDescriptorBinding(0, Gfx::SE_DESCRIPTOR_TYPE_STORAGE_BUFFER);
     descriptorLayout->addDescriptorBinding(1, Gfx::SE_DESCRIPTOR_TYPE_STORAGE_BUFFER);
     descriptorLayout->addDescriptorBinding(2, Gfx::SE_DESCRIPTOR_TYPE_STORAGE_BUFFER);
diff --git a/src/Engine/Graphics/VertexData.cpp b/src/Engine/Graphics/VertexData.cpp
index 3a6e7e5..977f2fa 100644
--- a/src/Engine/Graphics/VertexData.cpp
+++ b/src/Engine/Graphics/VertexData.cpp
@@ -6,7 +6,7 @@
 #include "Graphics/Descriptor.h"
 #include "Component/Mesh.h"
 #include "Graphics/Shader.h"
-#include <set>
+#include "Containers/Set.h"
 
 using namespace Seele;
 
@@ -248,6 +248,12 @@ VertexData::VertexData()
 
 void Meshlet::build(const Array<uint32>& indices, Array<Meshlet>& meshlets)
 {
+    Map<uint32, Set<uint32>> connectivity;
+    for (uint32 i = 0; i < indices.size(); i+=3)
+    {
+        connectivity[indices[i]].insert(indices[i + 1]);
+        connectivity[indices[i]].insert(indices[i + 2]);
+    }
     Meshlet current = {
         .numVertices = 0,
         .numPrimitives = 0,
diff --git a/src/Engine/System/ComponentSystem.h b/src/Engine/System/ComponentSystem.h
index 86bcebc..2d514b5 100644
--- a/src/Engine/System/ComponentSystem.h
+++ b/src/Engine/System/ComponentSystem.h
@@ -23,29 +23,14 @@ public:
     {
         return Dependencies<>();
     }
-    template<typename... Dep>
-    auto mergeDependencies(Dep... deps)
-    {
-        return (deps | ...);
-    }
-    void setupView(Dependencies<>, ThreadPool& pool)
-    {
-        List<std::function<void()>> work;
-        registry.view<Components...>().each([&](Components&... comp){
-            work.add([&](){
-                update(comp...);
-            });
-        });
-        pool.runAndWait(std::move(work));
-    }
     template<typename... Deps>
     void setupView(Dependencies<Deps...>, ThreadPool& pool)
     {
         List<std::function<void()>> work;
         registry.view<Components..., Deps...>().each([&](Components&... comp, Deps&... deps){
             work.add([&]() {
-                (accessComponent(deps) + ...);
-                update((comp,...));
+                (accessComponent(deps), ...);
+                update(comp...);
             });
         });
         pool.runAndWait(std::move(work));
@@ -53,7 +38,7 @@ public:
     virtual void run(ThreadPool& pool, double delta) override
     {
         SystemBase::run(pool, delta);
-        setupView(mergeDependencies((getDependencies<Components>(),...)), pool);
+        setupView((getDependencies<Components>() | ...), pool);
     }
     virtual void update() {}
     virtual void update(Components&... components) = 0;
diff --git a/src/Engine/System/SystemBase.h b/src/Engine/System/SystemBase.h
index 9b7880b..afd08ad 100644
--- a/src/Engine/System/SystemBase.h
+++ b/src/Engine/System/SystemBase.h
@@ -12,7 +12,7 @@ class SystemBase
 public:
     SystemBase(PScene scene) : registry(scene->registry), scene(scene) {}
     virtual ~SystemBase() {}
-    virtual void run(ThreadPool& pool, double delta)
+    virtual void run(ThreadPool&, double delta)
     {
         deltaTime = delta;
         update();
diff --git a/src/Engine/ThreadPool.cpp b/src/Engine/ThreadPool.cpp
index ee1f121..6ff691d 100644
--- a/src/Engine/ThreadPool.cpp
+++ b/src/Engine/ThreadPool.cpp
@@ -25,16 +25,14 @@ ThreadPool::~ThreadPool()
 
 void ThreadPool::runAndWait(List<std::function<void()>> functions)
 {
-    {
-        std::unique_lock l(taskLock);
-        currentTask.numRemaining = functions.size();
-        currentTask.functions = std::move(functions);
-        taskCV.notify_all();
-    }
+    std::unique_lock l(taskLock);
+    currentTask.numRemaining = functions.size();
+    currentTask.functions = std::move(functions);
+    taskCV.notify_all();
+    
     while (currentTask.numRemaining > 0)
     {
-        std::unique_lock l2(completedLock);
-        completedCV.wait(l2);
+        completedCV.wait(l);
     }
 }
 
@@ -59,7 +57,6 @@ void ThreadPool::work()
         currentTask.numRemaining--;
         if (currentTask.numRemaining == 0)
         {
-            std::unique_lock l2(completedLock);
             completedCV.notify_one();
         }
     }
diff --git a/src/Engine/ThreadPool.h b/src/Engine/ThreadPool.h
index 0a0d786..afa27d8 100644
--- a/src/Engine/ThreadPool.h
+++ b/src/Engine/ThreadPool.h
@@ -21,7 +21,6 @@ private:
     Array<std::thread> workers;
     std::mutex taskLock;
     std::condition_variable taskCV;
-    std::mutex completedLock;
     std::condition_variable completedCV;
     Task currentTask;
     bool running = true;
diff --git a/tests/Engine/CMakeLists.txt b/tests/Engine/CMakeLists.txt
index 5639dba..e2d0111 100644
--- a/tests/Engine/CMakeLists.txt
+++ b/tests/Engine/CMakeLists.txt
@@ -7,4 +7,5 @@ target_include_directories(SeeleUnitTests PUBLIC ./)
 add_subdirectory(Containers/)
 add_subdirectory(Graphics/)
 add_subdirectory(Math/)
-add_subdirectory(Serialization/)
\ No newline at end of file
+add_subdirectory(Serialization/)
+add_subdirectory(System/)
\ No newline at end of file
diff --git a/tests/Engine/System/CMakeLists.txt b/tests/Engine/System/CMakeLists.txt
new file mode 100644
index 0000000..e625970
--- /dev/null
+++ b/tests/Engine/System/CMakeLists.txt
@@ -0,0 +1,3 @@
+target_sources(SeeleUnitTests
+	PRIVATE
+		ComponentSystem.cpp)
\ No newline at end of file
diff --git a/tests/Engine/System/ComponentSystem.cpp b/tests/Engine/System/ComponentSystem.cpp
new file mode 100644
index 0000000..d9bdf98
--- /dev/null
+++ b/tests/Engine/System/ComponentSystem.cpp
@@ -0,0 +1,9 @@
+#include "EngineTest.h"
+#include "Component/Component.h"
+#include "Component/Transform.h"
+#include "Component/Camera.h"
+#include "Component/DirectionalLight.h"
+#include "System/ComponentSystem.h"
+
+using namespace Seele;
+using namespace Seele::System;
diff --git a/tests/Engine/ThreadPool.cpp b/tests/Engine/ThreadPool.cpp
index d61f90f..956b93b 100644
--- a/tests/Engine/ThreadPool.cpp
+++ b/tests/Engine/ThreadPool.cpp
@@ -8,14 +8,13 @@ TEST(ThreadPool, RunBatch)
     uint32 test = 20;
     std::mutex m;
     List<std::function<void()>> work;
-    for (uint32 i = 0; i < 400; ++i)
+    for (uint32 i = 0; i < 40000; ++i)
     {
         work.add([&]() {
             std::unique_lock l(m);
-            std::this_thread::sleep_for(std::chrono::milliseconds(10));
             test++;
         });
     }
     t.runAndWait(std::move(work));
-    ASSERT_EQ(test, 420);
+    ASSERT_EQ(test, 40020);
 }
\ No newline at end of file