99 lines
3.1 KiB
C++
99 lines
3.1 KiB
C++
#pragma once
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#include <extra2d/core/types.h>
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#include <extra2d/scene/scene.h>
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#include <functional>
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#include <stack>
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#include <string>
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#include <unordered_map>
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#include <vector>
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namespace extra2d {
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// 前向声明
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struct RenderCommand;
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class Renderer;
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// ============================================================================
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// 场景管理器 - 管理场景的生命周期和切换
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// ============================================================================
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class SceneManager {
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public:
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// ------------------------------------------------------------------------
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// 单例访问
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// ------------------------------------------------------------------------
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static SceneManager &getInstance();
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// ------------------------------------------------------------------------
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// 场景栈操作
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// ------------------------------------------------------------------------
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// 运行第一个场景
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void runWithScene(Ptr<Scene> scene);
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// 替换当前场景
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void replaceScene(Ptr<Scene> scene);
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// 压入新场景（当前场景暂停）
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void pushScene(Ptr<Scene> scene);
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// 弹出当前场景（恢复上一个场景）
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void popScene();
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// 弹出到根场景
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void popToRootScene();
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// 弹出到指定场景
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void popToScene(const std::string &name);
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// ------------------------------------------------------------------------
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// 获取场景
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// ------------------------------------------------------------------------
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Ptr<Scene> getCurrentScene() const;
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Ptr<Scene> getPreviousScene() const;
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Ptr<Scene> getRootScene() const;
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// 通过名称获取场景
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Ptr<Scene> getSceneByName(const std::string &name) const;
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// ------------------------------------------------------------------------
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// 查询
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// ------------------------------------------------------------------------
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size_t getSceneCount() const { return sceneStack_.size(); }
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bool isEmpty() const { return sceneStack_.empty(); }
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bool hasScene(const std::string &name) const;
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// ------------------------------------------------------------------------
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// 更新和渲染
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// ------------------------------------------------------------------------
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void update(float dt);
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void render(Renderer &renderer);
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void collectRenderCommands(std::vector<RenderCommand> &commands);
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// ------------------------------------------------------------------------
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// 过渡控制
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// ------------------------------------------------------------------------
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bool isTransitioning() const { return false; }
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// ------------------------------------------------------------------------
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// 清理
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// ------------------------------------------------------------------------
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void end();
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void purgeCachedScenes();
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public:
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SceneManager() = default;
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~SceneManager() = default;
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SceneManager(const SceneManager &) = delete;
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SceneManager &operator=(const SceneManager &) = delete;
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// 场景切换（供 Application 使用）
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void enterScene(Ptr<Scene> scene);
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private:
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std::stack<Ptr<Scene>> sceneStack_;
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std::unordered_map<std::string, Ptr<Scene>> namedScenes_;
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};
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} // namespace extra2d
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