Made a homemade ECS

5 files changed, 143 insertions, 0 deletions

diff --git a/mwe/ecs-homemade/inc/ComponentManager.h b/mwe/ecs-homemade/inc/ComponentManager.h
new file mode 100644
index 0000000..cfc5f20
--- /dev/null
+++ b/mwe/ecs-homemade/inc/ComponentManager.h
@@ -0,0 +1,37 @@
+#pragma once
+
+#include "Components.h"
+#include <cstdint>
+#include <unordered_map>
+#include <vector>
+#include <typeindex>
+#include <memory>
+#include <any>
+
+class ComponentManager {
+public:
+	static ComponentManager& GetInstance();
+
+	ComponentManager(const ComponentManager&) = delete;
+    ComponentManager(ComponentManager&&) = delete;
+    ComponentManager& operator=(const ComponentManager&) = delete;
+    ComponentManager& operator=(ComponentManager&&) = delete;
+
+	template <typename T>
+	void AddComponent(T* component, std::uint32_t id);
+	template <typename T>
+    T* GetComponent(std::uint32_t id);
+	template <typename T>
+	std::vector<std::uint32_t> GetAllComponentIDs();
+	template <typename T>
+	std::vector<T*> GetAllComponentPointer();
+
+private:
+    static ComponentManager mInstance;
+
+    ComponentManager();
+
+	std::unordered_map<std::type_index, std::vector<Component*>> mComponents;	//TODO: Make this not only work with Component* OR add extra checks at templated methodes!!!
+};
+
+#include "ComponentManager.hpp"
diff --git a/mwe/ecs-homemade/inc/ComponentManager.hpp b/mwe/ecs-homemade/inc/ComponentManager.hpp
new file mode 100644
index 0000000..df8ea32
--- /dev/null
+++ b/mwe/ecs-homemade/inc/ComponentManager.hpp
@@ -0,0 +1,58 @@
+// AddComponent implementation
+template <typename T>
+void ComponentManager::AddComponent(T* component, std::uint32_t id) {
+    std::type_index type = typeid(T);
+    if (mComponents.find(type) == mComponents.end()) {
+        mComponents[type] = std::vector<Component*>();
+    }
+    // Resize the vector if the id is greater than current size
+    if (id >= mComponents[type].size()) {
+        mComponents[type].resize(id + 1, nullptr); // Initialize new slots to nullptr
+    }
+    mComponents[type][id] = component; // Store the raw pointer
+}
+
+// GetComponent implementation
+template <typename T>
+T* ComponentManager::GetComponent(std::uint32_t id) {
+    std::type_index type = typeid(T);
+    if (mComponents.find(type) != mComponents.end()) {
+        auto& componentArray = mComponents[type];
+        if (id < componentArray.size()) {
+            return static_cast<T*>(componentArray[id]); // Cast to the correct type
+        }
+    }
+    return nullptr; // Return nullptr if not found
+}
+
+// GetAllComponentIDs implementation
+template <typename T>
+std::vector<std::uint32_t> ComponentManager::GetAllComponentIDs() {
+    std::type_index type = typeid(T);
+    std::vector<std::uint32_t> ids;
+    if (mComponents.find(type) != mComponents.end()) {
+        const auto& componentArray = mComponents[type];
+        for (std::uint32_t id = 0; id < componentArray.size(); ++id) {
+            if (componentArray[id] != nullptr) {
+                ids.push_back(id); // Collect IDs of non-null components
+            }
+        }
+    }
+    return ids;
+}
+
+// GetAllComponentPointer implementation
+template <typename T>
+std::vector<T*> ComponentManager::GetAllComponentPointer() {
+    std::type_index type = typeid(T);
+    std::vector<T*> pointers;
+    if (mComponents.find(type) != mComponents.end()) {
+        const auto& componentArray = mComponents[type];
+        for (const auto& component : componentArray) {
+            if (component != nullptr) {
+                pointers.push_back(static_cast<T*>(component)); // Cast to the correct type
+            }
+        }
+    }
+    return pointers;
+}
diff --git a/mwe/ecs-homemade/inc/Components.h b/mwe/ecs-homemade/inc/Components.h
new file mode 100644
index 0000000..1ea8428
--- /dev/null
+++ b/mwe/ecs-homemade/inc/Components.h
@@ -0,0 +1,22 @@
+#pragma once
+
+class Component {
+public:
+	Component();
+
+	bool mActive;
+};
+
+class Sprite : public Component {
+public:
+	void Render();
+};
+
+class Rigidbody : public Component {
+public:
+	Rigidbody(int mass, int gravityScale, int bodyType);
+
+	int mMass;
+	int mGravityScale;
+	int mBodyType;
+};
diff --git a/mwe/ecs-homemade/inc/GameObjectMax.h b/mwe/ecs-homemade/inc/GameObjectMax.h
new file mode 100644
index 0000000..dbfe981
--- /dev/null
+++ b/mwe/ecs-homemade/inc/GameObjectMax.h
@@ -0,0 +1,20 @@
+#pragma once
+
+#include <cstdint>
+#include <string>
+
+class GameObject {
+public:
+	GameObject(std::uint32_t id, std::string name, std::string tag, int layer);
+
+	template <typename T>
+	void AddComponent(T* component);
+
+	std::uint32_t mId;
+	std::string mName;
+	std::string mTag;
+	bool mActive;
+	int mLayer;
+};
+
+#include "GameObjectMax.hpp"
diff --git a/mwe/ecs-homemade/inc/GameObjectMax.hpp b/mwe/ecs-homemade/inc/GameObjectMax.hpp
new file mode 100644
index 0000000..e1a49be
--- /dev/null
+++ b/mwe/ecs-homemade/inc/GameObjectMax.hpp
@@ -0,0 +1,6 @@
+#include "ComponentManager.h"
+
+template <typename T>
+void GameObject::AddComponent(T* component) {
+	ComponentManager::GetInstance().AddComponent(component, mId);
+}