serialization: scene save/load (Unity-style YAML + UE-style GUID registry)

Engine-layer SceneSerializer (yaml-cpp submodule): entities/components to versioned YAML, atomic clear-and-rebuild on load with per-entity fault tolerance, missing-field defaults, unknown-component skip and UUID dedup. Asset references are {Guid, Path} pairs resolved through the new AssetManager GUID registry (assets/asset_registry.yaml) with path fallback; procedural:// pseudo-paths rebuild from parameters. Editor File menu gets Save/Load Scene modals; app re-resolves stale entity handles via onSceneLoaded callback.
2026-10-03 14:47:02 +08:00
parent ffe33e9967
commit 007d175314
14 changed files with 867 additions and 1 deletions
@@ -15,12 +15,17 @@
 #include "ViewportPanel.h"
 #include "StatsPanel.h"

+#include <Engine/Core/Log.h>
+#include <Engine/Serialization/SceneSerializer.h>
+
 #include <imgui.h>
 #include <imgui_internal.h>   // DockBuilder*（内部 API）
 #include <ImGuizmo.h>

 #include <GLFW/glfw3.h>

+#include <filesystem>
+
 using namespace Engine;   // kDisplayViewport / kDisplayDirect（SceneTypes.h）

 Editor::Editor() = default;
@@ -79,6 +84,7 @@ void Editor::Draw()
    if (m_ShowStats)     m_Stats->Draw(m_Ctx);

    DrawQuitModal();
+    DrawSceneModals();
 }

 // 输入归属判定：ImGui 侧经自身后端链式回调永远正常收输入，这里
@@ -126,6 +132,15 @@ void Editor::DrawMenuBar()

    if (ImGui::BeginMenu("File"))
    {
+        if (ImGui::MenuItem("Save Scene...", nullptr))
+        {
+            m_ShowSaveModal = true;
+        }
+        if (ImGui::MenuItem("Load Scene...", nullptr))
+        {
+            m_ShowLoadModal = true;
+        }
+        ImGui::Separator();
        if (ImGui::MenuItem("Quit", "Alt+F4"))
        {
            RequestQuit();
@@ -215,3 +230,147 @@ void Editor::DrawQuitModal()
        m_Ctx.app->Close();
    }
 }
+
+void Editor::DrawSceneModals()
+{
+    // 保存/加载共用一个路径输入（UE 同款：默认路径记住上次输入）
+    if (m_ShowSaveModal)
+    {
+        ImGui::OpenPopup("Save Scene");
+        m_ShowSaveModal = false;
+    }
+    if (m_ShowLoadModal)
+    {
+        ImGui::OpenPopup("Load Scene");
+        m_ShowLoadModal = false;
+    }
+
+    ImGui::SetNextWindowPos(
+        ImGui::GetMainViewport()->GetCenter(),
+        ImGuiCond_Appearing, ImVec2(0.5f, 0.5f));
+
+    if (ImGui::BeginPopupModal("Save Scene", nullptr,
+                               ImGuiWindowFlags_AlwaysAutoResize))
+    {
+        ImGui::TextUnformatted("Scene file path (relative to working dir):");
+        ImGui::SetNextItemWidth(400.0f);
+        ImGui::InputText("##SavePath", m_ScenePathBuf, sizeof(m_ScenePathBuf));
+        ImGui::Separator();
+        if (ImGui::Button("Save", ImVec2(120, 0)))
+        {
+            DoSaveScene();
+            ImGui::CloseCurrentPopup();
+        }
+        ImGui::SameLine();
+        if (ImGui::Button("Cancel", ImVec2(120, 0)))
+        {
+            ImGui::CloseCurrentPopup();
+        }
+        ImGui::EndPopup();
+    }
+
+    if (ImGui::BeginPopupModal("Load Scene", nullptr,
+                               ImGuiWindowFlags_AlwaysAutoResize))
+    {
+        ImGui::TextUnformatted("Scene file path (relative to working dir):");
+        ImGui::SetNextItemWidth(400.0f);
+        ImGui::InputText("##LoadPath", m_ScenePathBuf, sizeof(m_ScenePathBuf));
+        ImGui::Separator();
+        if (ImGui::Button("Load", ImVec2(120, 0)))
+        {
+            DoLoadScene();
+            ImGui::CloseCurrentPopup();
+        }
+        ImGui::SameLine();
+        if (ImGui::Button("Cancel", ImVec2(120, 0)))
+        {
+            ImGui::CloseCurrentPopup();
+        }
+        ImGui::EndPopup();
+    }
+}
+
+void Editor::DoSaveScene()
+{
+    const std::string path = m_ScenePathBuf;
+    if (path.empty() || !m_Ctx.scene || !m_Ctx.assets)
+    {
+        return;
+    }
+
+    // scenes/ 目录不存在时自动创建（空父目录/已存在均合法）
+    std::error_code ec;
+    std::filesystem::create_directories(
+        std::filesystem::path(path).parent_path(), ec);
+
+    // 环境路径：引擎序列化器只认字符串，查表由编辑器侧负责
+    std::string envPath;
+    if (m_Ctx.getEnvIndex)
+    {
+        const int idx = m_Ctx.getEnvIndex();
+        if (idx >= 0 && idx < kEnvCount) envPath = kEnvPaths[idx];
+    }
+
+    if (Serialization::SceneSerializer::Serialize(*m_Ctx.scene, *m_Ctx.assets,
+                                                  path, envPath))
+    {
+        ENGINE_INFO("Editor: scene saved to '{}'", path);
+    }
+    else
+    {
+        ENGINE_ERROR("Editor: failed to save scene to '{}'", path);
+    }
+}
+
+void Editor::DoLoadScene()
+{
+    const std::string path = m_ScenePathBuf;
+    if (path.empty() || !m_Ctx.scene || !m_Ctx.assets)
+    {
+        return;
+    }
+
+    std::string envPath;
+    if (!Serialization::SceneSerializer::Deserialize(*m_Ctx.scene,
+                                                     *m_Ctx.assets, path,
+                                                     envPath))
+    {
+        ENGINE_ERROR("Editor: failed to load scene '{}'", path);
+        return;
+    }
+    ENGINE_INFO("Editor: scene loaded from '{}'", path);
+
+    // 旧实体已销毁：清选中（连带清描边，见 SelectEntity）
+    SelectEntity(entt::null);
+
+    // 环境恢复：场景带环境且命中环境表才切换（镜像 StatsPanel 同步路径）
+    if (!envPath.empty() && m_Ctx.getEnvIndex && m_Ctx.setEnvIndex)
+    {
+        int found = -1;
+        for (int i = 0; i < kEnvCount; ++i)
+        {
+            if (envPath == kEnvPaths[i]) { found = i; break; }
+        }
+        if (found >= 0)
+        {
+            m_Ctx.setEnvIndex(found);
+            const auto env = m_Ctx.assets->LoadEnvironment(kEnvPaths[found]);
+            if (env.Valid())
+            {
+                m_Ctx.renderer->SetEnvironment(
+                    m_Ctx.assets->GetEnvironment(env));
+            }
+        }
+        else
+        {
+            ENGINE_WARN("Editor: scene env '{}' not in env table, "
+                        "keeping current", envPath);
+        }
+    }
+
+    // 应用层重解析悬空句柄（相机等沙盒状态）
+    if (m_Ctx.onSceneLoaded)
+    {
+        m_Ctx.onSceneLoaded();
+    }
+}