添加场景加载与保存功能

.gitmodules

@@ -11,3 +11,6 @@
 [submodule "Hazel/vendor/glm"]
 	path = Hazel/vendor/glm
 	url = https://github.com/g-truc/glm.git
+[submodule "Hazel/vendor/yaml-cpp"]
+	path = Hazel/vendor/yaml-cpp
+	url = https://github.com/jbeder/yaml-cpp.git

Hazel/CMakeLists.txt

@@ -1,14 +1,13 @@
 set(PROJECT_NAME Hazel)
 project(${PROJECT_NAME})
 
-add_subdirectory(vendor/SDL)
-set(SDL3_SHARED ON CACHE BOOL "Build SDL as shared library" FORCE)
 
 add_subdirectory(vendor/spdlog)
 add_subdirectory(vendor/GLAD)
 add_subdirectory(vendor/glm)
+add_subdirectory(vendor/yaml-cpp)
 
-file(GLOB_RECURSE SOURCES "src/*.cpp")
+file(GLOB_RECURSE SOURCES "src/**.cpp")
 
 # stb_image
 set(STB_INCLUDE_DIR vendor/stb)
@@ -27,6 +26,10 @@ file(GLOB IMGUI ${IMGUI_INCLUDE_DIR}/*.cpp
                 ${IMGUI_INCLUDE_DIR}/backends/imgui_impl_opengl3.cpp
                 ${IMGUI_INCLUDE_DIR}/backends/imgui_impl_sdl3.cpp)
 
+set(BUILD_SHARED_LIBS ON CACHE BOOL "Build shared libraries" FORCE)
+add_subdirectory(vendor/SDL)
+set(SDL3_SHARED ON CACHE BOOL "Build SDL as shared library" FORCE)
+
 add_library(${PROJECT_NAME} SHARED
         ${SOURCES}
         ${STB}
@@ -49,6 +52,7 @@ target_link_libraries(${PROJECT_NAME} PUBLIC
         glad
         opengl32
         glm::glm
+        yaml-cpp::yaml-cpp
 )
 target_compile_definitions(${PROJECT_NAME} PRIVATE HZ_BUILD_DLL STB_IMAGE_IMPLEMENTATION HZ_PROFILE)# 编译DLL时定义
 

Hazel/src/Hazel/Renderer/OrthographicCameraController.cpp

@@ -26,11 +26,11 @@ namespace Hazel
     void OrthographicCameraController::OnUpdate(TimeStep ts)
     {
         HZ_PROFILE_FUNCTION();
-	    static const bool* state = SDL_GetKeyboardState(NULL);
+	    const bool* state = SDL_GetKeyboardState(nullptr);
     	float       time  = ts;
 
 	    if (state[SDL_SCANCODE_A])
-		    m_CameraPosition.x -= m_CameraTranslationSpeed * time;
+	    	m_CameraPosition.x -= m_CameraTranslationSpeed * time;
 	    else if (state[SDL_SCANCODE_D])
 		    m_CameraPosition.x += m_CameraTranslationSpeed * time;
 

Hazel/src/Hazel/Scene/Scene.h

@@ -34,14 +34,12 @@ namespace Hazel
         template<typename T>
         void OnComponentAdded(Entity entity, T& component);
 
-
-
     private:
         entt::registry m_Registry;
-
         uint32_t m_ViewportWidth = 0, m_ViewportHeight = 0;
 
         friend class Entity;
+        friend class SceneSerializer;
         friend class SceneHierachyPanel;
     };
 }

Hazel/src/Hazel/Scene/SceneSerializer.cpp

@@ -0,0 +1,260 @@
+//
+// Created by sfd on 25-5-31.
+//
+
+#include "SceneSerializer.h"
+
+#include <fstream>
+
+#include "Components.h"
+#include "Entity.h"
+#include "yaml-cpp/yaml.h"
+
+namespace YAML
+{
+    template<>
+    struct convert<glm::vec3>
+    {
+        static Node encode(const glm::vec3& out)
+        {
+            Node node;
+            node.push_back(out.x);
+            node.push_back(out.y);
+            node.push_back(out.z);
+            node.SetStyle(EmitterStyle::Flow);
+            return node;
+        }
+
+        static bool decode(const Node& node, glm::vec3& out)
+        {
+            if (node.size() != 3 && !node.IsSequence())
+                return false;
+            out.x = node[0].as<float>();
+            out.y = node[1].as<float>();
+            out.z = node[2].as<float>();
+            return true;
+        }
+    };
+
+    template<>
+    struct convert<glm::vec4>
+    {
+        static Node encode(const glm::vec4& out)
+        {
+            Node node;
+            node.push_back(out.x);
+            node.push_back(out.y);
+            node.push_back(out.z);
+            node.push_back(out.w);
+            node.SetStyle(EmitterStyle::Flow);
+            return node;
+        }
+
+        static bool decode(const Node& node, glm::vec4& out)
+        {
+            if (node.size() != 4 && !node.IsSequence())
+                return false;
+            out.x = node[0].as<float>();
+            out.y = node[1].as<float>();
+            out.z = node[2].as<float>();
+            out.w = node[3].as<float>();
+            return true;
+        }
+    };
+
+    Emitter& operator<<(Emitter& out, const glm::vec3& value)
+    {
+        out << Flow;
+        out << BeginSeq << value.x << value.y << value.z << EndSeq;
+        return out;
+    }
+
+    Emitter& operator<<(Emitter& out, const glm::vec4& value)
+    {
+        out << Flow;
+        out << BeginSeq << value.x << value.y << value.z << value.w << EndSeq;
+        return out;
+    }
+}
+
+namespace Hazel
+{
+
+
+
+    SceneSerializer::SceneSerializer(const Ref<Scene> scene)
+        : m_Scene(scene)
+    {
+    }
+
+    static void SerializeEntity(YAML::Emitter& out, Entity entity)
+    {
+        out << YAML::BeginMap; // entity
+        out << YAML::Key << "Entity" << YAML::Value << "123479283";  // TODO: entity ID goes here
+
+        if (entity.HasComponent<TagComponent>())
+        {
+            out << YAML::Key << "TagComponent";
+
+            out << YAML::BeginMap;      // TagComponent
+
+            const auto& tag = entity.GetComponent<TagComponent>().Tag;
+            out << YAML::Key << "Tag" << YAML::Value << tag;
+
+            out << YAML::EndMap;        // TagComponent
+        }
+
+        if (entity.HasComponent<TransformComponent>())
+        {
+            out << YAML::Key << "TransformComponent";
+            out << YAML::BeginMap;      // TransformComponent
+
+            auto& transform = entity.GetComponent<TransformComponent>();
+            out << YAML::Key << "Translation" << YAML::Value << transform.Translation;
+            out << YAML::Key << "Rotation" << YAML::Value << transform.Rotation;
+            out << YAML::Key << "Scale" << YAML::Value << transform.Scale;
+
+            out << YAML::EndMap;        // TransformComponent
+        }
+
+        if (entity.HasComponent<CameraComponent>())
+        {
+            out << YAML::Key << "CameraComponent";
+
+            out << YAML::BeginMap;      // CameraComponent
+
+            auto& cameraComponent = entity.GetComponent<CameraComponent>();
+            auto& camera = cameraComponent.Camera;
+
+            out << YAML::Key << "Camera" << YAML::Value;      // CameraComponent
+            out << YAML::BeginMap;      // Camera
+
+            out << YAML::Key << "ProjectionType" << YAML::Value << (int)camera.GetProjectionType();
+            out << YAML::Key << "PerspectiveVerticalFOV" << YAML::Value << camera.GetPerspectiveVerticalFOV();
+            out << YAML::Key << "PerspectiveNear" << YAML::Value << camera.GetPerspectiveNearCLip();
+            out << YAML::Key << "PerspectiveFar" << YAML::Value << camera.GetPerspectiveFarCLip();
+            out << YAML::Key << "OrthographicSize" << YAML::Value << camera.GetOrthographicSize();
+            out << YAML::Key << "OrthographicNear" << YAML::Value << camera.GetOrthographicNearCLip();
+            out << YAML::Key << "OrthographicFar" << YAML::Value << camera.GetOrthographicFarCLip();
+
+            out << YAML::Key << "Primary" << YAML::Value << cameraComponent.Primary;
+            out << YAML::Key << "FixedAspectRatio" << YAML::Value << cameraComponent.FixedAspectRatio;
+
+            out << YAML::EndMap;      // Camera
+            out << YAML::EndMap;        // CameraComponent
+        }
+
+        if (entity.HasComponent<SpriteRendererComponent>())
+        {
+            out << YAML::Key << "SpriteRendererComponent";
+
+            out << YAML::BeginMap;      // SpriteRendererComponent
+            auto& spriteRendererComponent = entity.GetComponent<SpriteRendererComponent>();
+            out << YAML::Key << "Color" << YAML::Value << spriteRendererComponent.Color;
+            out << YAML::EndMap;        // SpriteRendererComponent
+        }
+
+        out << YAML::EndMap; // entity
+    }
+
+    void SceneSerializer::Serialize(const std::string& filepath) const
+    {
+        YAML::Emitter out;
+        out << YAML::BeginMap;
+        out << YAML::Key << "Scene" << YAML::Value << "Untitled";
+        out << YAML::Key << "Entities" << YAML::Value << YAML::BeginSeq;
+        m_Scene->m_Registry.view<entt::entity>().each([&](auto entityID)
+        {
+            const Entity entity = {entityID, m_Scene.get()};
+            if (!entity)
+                return;
+
+            SerializeEntity(out, entity);
+        });
+
+        std::ofstream fout(filepath);
+        fout << out.c_str();
+    }
+
+    void SceneSerializer::SerializeRuntime(const std::string& filepath)
+    {
+    }
+
+    bool SceneSerializer::Deserialize(const std::string& filepath)
+    {
+        const std::ifstream stream(filepath);
+        std::stringstream strStream;
+        strStream << stream.rdbuf();
+
+        YAML::Node data = YAML::Load(strStream.str());
+        if (!data["Scene"])
+            return false;
+
+        auto sceneName = data["Scene"].as<std::string>();
+
+        HZ_CORE_TRACE("Deserializing Scene {}", strStream.str());
+
+        auto entities = data["Entities"];
+        if (entities)
+        {
+            for (auto entity : entities)
+            {
+                uint64_t uuid = entity["Entity"].as<uint64_t>();        // TODO
+
+                std::string name;
+                auto TagComponent = entity["TagComponent"];
+                if (TagComponent)
+                    name = TagComponent["Tag"].as<std::string>();
+
+                HZ_CORE_TRACE("Deserializing Entity: {0}:({1})", name, uuid);
+
+                Entity deserializedEntity = m_Scene->CreateEntity(name);
+
+                auto transformComponent = entity["TransformComponent"];
+                if (transformComponent)
+                {
+                    auto& transform = deserializedEntity.GetComponent<TransformComponent>();
+                    transform.Translation = transformComponent["Translation"].as<glm::vec3>();
+                    transform.Rotation = transformComponent["Rotation"].as<glm::vec3>();
+                    transform.Scale = transformComponent["Scale"].as<glm::vec3>();
+                }
+
+                auto cameraComponent = entity["CameraComponent"];
+                if (cameraComponent)
+                {
+                    auto& camera = deserializedEntity.AddComponent<CameraComponent>();
+
+                    auto cameraProps = cameraComponent["Camera"];
+                    camera.Camera.SetProjectionType((ScenceCamera::ProjectionType)cameraProps["ProjectionType"].as<int>());
+
+                    camera.Camera.SetPerspectiveVerticalFOV(cameraProps["PerspectiveVerticalFOV"].as<float>());
+                    camera.Camera.SetPerspectiveNearClip(cameraProps["PerspectiveNear"].as<float>());
+                    camera.Camera.SetPerspectiveFarClip(cameraProps["PerspectiveFar"].as<float>());
+
+                    camera.Camera.SetOrthographicSize(cameraProps["OrthographicSize"].as<float>());
+                    camera.Camera.SetOrthographicNearClip(cameraProps["OrthographicNear"].as<float>());
+                    camera.Camera.SetOrthographicFarClip(cameraProps["OrthographicFar"].as<float>());
+
+                    camera.Primary = cameraProps["Primary"].as<bool>();
+                    camera.FixedAspectRatio = cameraProps["FixedAspectRatio"].as<bool>();
+                }
+
+                auto spriteRendererComponent = entity["SpriteRendererComponent"];
+                if (spriteRendererComponent)
+                {
+                    auto& sprite = deserializedEntity.AddComponent<SpriteRendererComponent>();
+                    sprite.Color = spriteRendererComponent["Color"].as<glm::vec4>();
+                }
+
+            }
+        }
+
+        return true;
+    }
+
+    bool SceneSerializer::DeserializeRuntime(const std::string& filepath)
+    {
+        return false;
+    }
+
+}

Hazel/src/Hazel/Scene/SceneSerializer.h

@@ -0,0 +1,27 @@
+//
+// Created by sfd on 25-5-31.
+//
+
+#ifndef SCENESERIALIZER_H
+#define SCENESERIALIZER_H
+#include "Scene.h"
+
+namespace Hazel
+{
+    class HAZEL_API SceneSerializer
+    {
+    public:
+        SceneSerializer(const Ref<Scene> scene);
+
+        void Serialize(const std::string& filepath) const;
+        void SerializeRuntime(const std::string& filepath);
+
+        bool Deserialize(const std::string& filepath);
+        bool DeserializeRuntime(const std::string& filepath);
+    private:
+        Ref<Scene> m_Scene;
+    };
+
+}
+
+#endif //SCENESERIALIZER_H

Hazel/src/Hazel/Utils/PlatformUtils.cpp

@@ -0,0 +1,5 @@
+//
+// Created by sfd on 25-5-31.
+//
+
+#include "PlatformUtils.h"

Hazel/src/Hazel/Utils/PlatformUtils.h

@@ -0,0 +1,23 @@
+//
+// Created by sfd on 25-5-31.
+//
+
+#ifndef PLATFORMUTILS_H
+#define PLATFORMUTILS_H
+
+#include <string>
+#include "Hazel/Core/Core.h"
+
+namespace Hazel
+{
+    class HAZEL_API FileDiaglogs
+    {
+    public:
+        // return empty strings if cancelled
+        static std::string OpenFile(const char* filter);
+        static std::string SaveFile(const char* filter);
+    };
+}
+
+
+#endif //PLATFORMUTILS_H

Hazel/src/Platform/Windows/WindowsPlatformUtils.cpp

@@ -0,0 +1,5 @@
+//
+// Created by sfd on 25-5-31.
+//
+
+#include "WindowsPlatformUtils.h"

Hazel/src/Platform/Windows/WindowsPlatformUtils.h

@@ -0,0 +1,74 @@
+//
+// Created by sfd on 25-5-31.
+//
+
+#ifndef WINDOWSPLATFORMUTILS_H
+#define WINDOWSPLATFORMUTILS_H
+
+#include <AsyncInfo.h>
+#include <commdlg.h>
+
+#include <Hazel/Utils/PlatformUtils.h>
+#include <Hazel/Core/Application.h>
+
+namespace Hazel
+{
+    std::string FileDiaglogs::OpenFile(const char* filter)
+    {
+        OPENFILENAME ofn;       // common diaglog box structure
+        CHAR szFile[260] = { 0 };
+
+
+        SDL_PropertiesID props = SDL_GetWindowProperties((SDL_Window*)Application::Get().GetWindow().GetNativeWindow());
+        void * hwnd_ptr = SDL_GetPointerProperty(props, SDL_PROP_WINDOW_WIN32_HWND_POINTER, nullptr);
+
+        //   Init OPENFILENAME
+        ZeroMemory(&ofn, sizeof(OPENFILENAME));
+        ofn.lStructSize = sizeof(OPENFILENAME);
+        ofn.hwndOwner = (HWND)hwnd_ptr;
+        ofn.lpstrFile = szFile;
+        ofn.nMaxFile = sizeof(szFile);
+        ofn.lpstrFilter = filter;
+        ofn.nFilterIndex = 1;
+        ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST | OFN_NOCHANGEDIR;
+        if (GetOpenFileName(&ofn) == TRUE)
+        {
+            return ofn.lpstrFile;
+        }
+
+        return std::string();
+
+    }
+
+    std::string FileDiaglogs::SaveFile(const char* filter)
+    {
+        OPENFILENAME ofn;       // common diaglog box structure
+        CHAR szFile[260] = { 0 };
+
+
+        SDL_PropertiesID props = SDL_GetWindowProperties((SDL_Window*)Application::Get().GetWindow().GetNativeWindow());
+        void * hwnd_ptr = SDL_GetPointerProperty(props, SDL_PROP_WINDOW_WIN32_HWND_POINTER, nullptr);
+
+        //   Init OPENFILENAME
+        ZeroMemory(&ofn, sizeof(OPENFILENAME));
+        ofn.lStructSize = sizeof(OPENFILENAME);
+        ofn.hwndOwner = (HWND)hwnd_ptr;
+        ofn.lpstrFile = szFile;
+        ofn.nMaxFile = sizeof(szFile);
+        ofn.lpstrFilter = filter;
+        ofn.nFilterIndex = 1;
+        ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST | OFN_NOCHANGEDIR;
+        if (GetSaveFileName(&ofn) == TRUE)
+        {
+            return ofn.lpstrFile;
+        }
+
+        return std::string();
+
+
+    }
+
+}
+
+
+#endif //WINDOWSPLATFORMUTILS_H

Sandbox/src/DemoBox/GameLayer.cpp

@@ -1,53 +0,0 @@
-//
-// Created by sfd on 25-5-18.
-//
-
-#include "GameLayer.h"
-
-#include <Hazel/Core/Application.h>
-#include <Hazel/Renderer/Renderer2D.h>
-#include <Hazel/Renderer/RendererCommand.h>
-
-GameLayer::GameLayer() : Layer("GameLayer") , m_cameraController((float)(Application::Get().GetWindow().GetWidth()) / (float)(Application::Get().GetWindow().GetHeight()))
-{
-}
-
-
-void GameLayer::OnAttach()
-{
-}
-
-void GameLayer::OnDetech()
-{
-}
-
-void GameLayer::OnUpdate(TimeStep& ts)
-{
-    auto mouseState = SDL_GetMouseState(NULL, NULL);
-    static Uint32 prevMouseState = 0;
-    m_cameraController.OnUpdate(ts);
-
-    RendererCommand::SetClearColor({0.2f, 0.2f, 0.2f, 1.0f});
-    RendererCommand::Clear();
-
-    Renderer2D::BeginScene(m_cameraController.GetCamera());
-
-    Hazel::Renderer2D::DrawQuad({0.0f, 0.0f}, {1.0f, 1.0f}, {1.0f, 1.0f, 1.0f, 1.0f});
-
-    Renderer2D::EndScene();
-
-    if ((mouseState & SDL_BUTTON_LMASK) && !(prevMouseState & SDL_BUTTON_LMASK))
-    {
-        HZ_CORE_INFO("LEFT Mouse Clicked!");
-    }
-    prevMouseState = mouseState;
-}
-
-void GameLayer::OnEvent(SDL_Event& e)
-{
-    m_cameraController.OnEvent(e);
-}
-
-void GameLayer::OnImGuiRender()
-{
-}

Sandbox/src/DemoBox/GameLayer.h

@@ -1,30 +0,0 @@
-//
-// Created by sfd on 25-5-18.
-//
-
-#ifndef GAMELAYER_H
-#define GAMELAYER_H
-#include <Hazel/Core/Layer.h>
-#include <Hazel/Renderer/OrthographicCameraController.h>
-
-
-using namespace Hazel;
-
-class GameLayer : public Layer{
-public:
-    GameLayer();
-    ~GameLayer() = default;
-
-    void OnAttach() override;
-    void OnDetech() override;
-    void OnUpdate(TimeStep& ts) override;
-    void OnEvent(SDL_Event& e) override;
-    void OnImGuiRender() override;
-
-private:
-    OrthographicCameraController m_cameraController;
-};
-
-
-
-#endif //GAMELAYER_H

Sandbox/src/Editor/EditorLayer.cpp

@@ -5,21 +5,20 @@
 #include "EditorLayer.h"
 
 #include <imgui.h>
-#include <iostream>
 #include <glm/gtc/type_ptr.hpp>
-
+#include <Hazel/Scene/SceneSerializer.h>
-#include "glm/ext/matrix_clip_space.hpp"
+#include <Hazel/Utils/PlatformUtils.h>
 
 namespace Hazel
 {
     EditorLayer::EditorLayer()
         : Layer("HazelEditor"), m_CameraController((float)Application::Get().GetWindow().GetWidth() / (float)Application::Get().GetWindow().GetHeight())
     {
+
     }
 
     void EditorLayer::OnAttach()
     {
-
     	FrameBufferSpecification spec;
     	spec.Width = Application::Get().GetWindow().GetWidth();
     	spec.Height = Application::Get().GetWindow().GetHeight();
@@ -40,8 +39,6 @@ namespace Hazel
     	redSquare.AddComponent<SpriteRendererComponent>(glm::vec4{1.0f, 0.0f, 0.0f, 1.0f});
 
 
-
-
     	m_CameraEntity = m_ActiveScene->CreateEntity("Camera A");
     	m_CameraEntity.AddComponent<CameraComponent>();
     	m_PrimaryCamera = true;
@@ -55,10 +52,10 @@ namespace Hazel
     	class CameraController : public ScriptableEntity
     	{
     	public:
-    		void OnUpdate(const TimeStep ts)
+    		void OnUpdate(const TimeStep ts) override
-    		{
+		    {
 				auto& translation = GetComponent<TransformComponent>().Translation;
-    			static const auto state = SDL_GetKeyboardState(nullptr);
+    			const auto state = SDL_GetKeyboardState(nullptr);
     			if (state[SDL_SCANCODE_A])
     				translation.x -= ts * speed;
     			if (state[SDL_SCANCODE_D])
@@ -77,6 +74,8 @@ namespace Hazel
 
 
     	m_SceneHierachyPanel.SetContext(m_ActiveScene);
+
+    	m_State = SDL_GetKeyboardState(nullptr);
     }
 
     void EditorLayer::OnDetech()
@@ -110,7 +109,7 @@ namespace Hazel
 	    RendererCommand::Clear();
 
 
-	    // Renderer2D::BeginScene(m_cameraController.GetCamera());
+	    // Renderer2D::BeginScene(m_CameraController.GetCamera());
 
 	    // update Scene
 	    m_ActiveScene->OnUpdate(ts);
@@ -192,6 +191,22 @@ namespace Hazel
 				    // ImGui::MenuItem("Fullscreen", NULL, &opt_fullscreen);
 				    // ImGui::MenuItem("Padding", NULL, &opt_padding);
 				    // ImGui::Separator();
+			    	if (ImGui::MenuItem("New", "Ctrl+N"))
+				    {
+			    		NewScene();
+				    }
+
+			    	if (ImGui::MenuItem("Open...", "Ctrl+O"))
+			    	{
+			    		OpenScene();
+			    	}
+
+			    	if (ImGui::MenuItem("Save As...", "Ctrl+Shift+S"))
+			    	{
+			    		SaveScene();
+			    	}
+
+			    	ImGui::Separator();
 
 				    if (ImGui::MenuItem("Exit")) { Hazel::Application::Get().Close(); }
 
@@ -256,5 +271,59 @@ namespace Hazel
 	    {
 		    m_CameraController.OnEvent(e);
 	    }
+
+#define SHORTCUT_NEW		(SDL_KMOD_CTRL | SDLK_N)
+#define SHORTCUT_OPEN		(SDL_KMOD_CTRL | SDLK_O)
+#define SHORTCUT_SAVE_ALL	(SDL_KMOD_CTRL | SDL_KMOD_SHIFT | SDLK_S)
+
+    	const auto mod = SDL_GetModState();
+		const auto ctrl = (mod & SDL_KMOD_CTRL) ? SDL_KMOD_CTRL : 0;
+    	const auto shift = (mod & SDL_KMOD_SHIFT) ? SDL_KMOD_SHIFT : 0;
+
+	    switch (ctrl | shift | e.key.key)
+    	{
+    		case SHORTCUT_NEW:
+				NewScene();
+    			break;
+    		case SHORTCUT_OPEN:
+    			OpenScene();
+    			break;
+    		case SHORTCUT_SAVE_ALL:
+    			SaveScene();
+    			break;
+    		default:
+    			break;
+    	}
+    }
+
+    void EditorLayer::SaveScene()
+    {
+	    std::string filepath = FileDiaglogs::SaveFile("Hazel Scene (*.scene)\0*.scene\0");
+	    if (!filepath.empty())
+	    {
+		    SceneSerializer serializer(m_ActiveScene);
+		    serializer.Serialize(filepath);
+	    }
+    }
+
+    void EditorLayer::OpenScene()
+    {
+	    std::string filepath = FileDiaglogs::OpenFile("Hazel Scene (*.scene)\0*.scene\0");
+	    if (!filepath.empty())
+	    {
+		    m_ActiveScene = CreateRef<Scene>();
+		    m_ActiveScene->OnViewportResize((uint32_t)m_ViewPortSize.x, (uint32_t)m_ViewPortSize.y);
+		    m_SceneHierachyPanel.SetContext(m_ActiveScene);
+
+		    SceneSerializer serializer(m_ActiveScene);
+		    serializer.Deserialize(filepath);
+	    }
+    }
+
+    void EditorLayer::NewScene()
+    {
+	    m_ActiveScene = CreateRef<Scene>();
+	    m_ActiveScene->OnViewportResize((uint32_t)m_ViewPortSize.x, (uint32_t)m_ViewPortSize.y);
+	    m_SceneHierachyPanel.SetContext(m_ActiveScene);
     }
 }

Sandbox/src/Editor/EditorLayer.h

@@ -22,6 +22,10 @@ namespace Hazel
         virtual void OnUpdate(TimeStep& ts) override;
         virtual void OnImGuiRender() override;
         virtual void OnEvent(SDL_Event& e) override;
+    private:
+        void SaveScene();
+        void OpenScene();
+        void NewScene();
 
     private:
         OrthographicCameraController m_CameraController;
@@ -45,6 +49,7 @@ namespace Hazel
         Ref<FrameBuffer> m_FrameBuffer;
 
         SceneHierachyPanel m_SceneHierachyPanel;
+        const bool* m_State = nullptr;
 
     };
 }

Sandbox/src/Editor/Panels/SceneHierachyPanel.cpp

@@ -18,16 +18,17 @@ namespace Hazel
     void SceneHierachyPanel::SetContext(const Ref<Scene>& context)
     {
         m_Context = context;
+        m_SelectionContext = {};
     }
 
     void SceneHierachyPanel::OnImGuiRender()
     {
         ImGui::Begin("Scene Hierachy");
 
-        for (const auto entityID : m_Context->m_Registry.view<entt::entity>())
+        m_Context->m_Registry.view<entt::entity>().each([&](auto entityID)
         {
             DrawEntityNode({entityID, m_Context.get()});
-        }
+        });
 
         if (ImGui::IsMouseDown(0) && ImGui::IsWindowHovered())
         {
@@ -185,6 +186,7 @@ namespace Hazel
 
         if (entity.HasComponent<T>())
         {
+            ImGui::PushID(&entity);
             auto& component = entity.GetComponent<T>();
 
             ImVec2 contextReginAvail = ImGui::GetContentRegionAvail();
@@ -219,7 +221,8 @@ namespace Hazel
             }
 
             if (removeComponent)
-                entity.RemoveComponent<SpriteRendererComponent>();
+                entity.RemoveComponent<T>();
+            ImGui::PopID();
         }
     }