完成物理引擎与物理组件

src/engine/physics/physics_engine.h

@@ -0,0 +1,41 @@
+#pragma once
+#include <vector>
+#include "glm/vec2.hpp"
+
+namespace engine::component {
+    class PhysicsComponent;
+}
+
+namespace engine::physics {
+
+/**
+ * @brief 负责管理和模拟物理行为及碰撞检测。
+ */
+class PhysicsEngine {
+private:
+    std::vector<engine::component::PhysicsComponent*> components_; ///< @brief 注册的物理组件容器，非拥有指针
+    glm::vec2 gravity_ = {0.0f, 980.0f};        ///< @brief 默认重力值 (像素/秒^2, 相当于100像素对应现实1m)
+    float max_speed_ = 500.0f;                  ///< @brief 最大速度 (像素/秒)
+
+public:
+    PhysicsEngine() = default;
+
+    // 禁止拷贝和移动
+    PhysicsEngine(const PhysicsEngine&) = delete;
+    PhysicsEngine& operator=(const PhysicsEngine&) = delete;
+    PhysicsEngine(PhysicsEngine&&) = delete;
+    PhysicsEngine& operator=(PhysicsEngine&&) = delete;
+
+    void registerComponent(engine::component::PhysicsComponent* component);     ///< @brief 注册物理组件
+    void unregisterComponent(engine::component::PhysicsComponent* component);   ///< @brief 注销物理组件
+
+    void update(float delta_time);      ///< @brief 核心循环：更新所有注册的物理组件的状态
+
+    // 设置器/获取器
+    void setGravity(const glm::vec2& gravity) { gravity_ = gravity; }   ///< @brief 设置全局重力加速度
+    const glm::vec2& getGravity() const { return gravity_; }            ///< @brief 获取当前的全局重力加速度
+    void setMaxSpeed(float max_speed) { max_speed_ = max_speed; }       ///< @brief 设置最大速度
+    float getMaxSpeed() const { return max_speed_; }                    ///< @brief 获取当前的最大速度
+};
+
+} // namespace engine::physics