62 lines
3.0 KiB
C++
62 lines
3.0 KiB
C++
#pragma once
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#include <vector>
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#include <utility> // for std::pair
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#include "glm/vec2.hpp"
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namespace engine::component {
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class PhysicsComponent;
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class TileLayerComponent;
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}
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namespace engine::object {
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class GameObject;
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}
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namespace engine::physics {
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/**
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* @brief 负责管理和模拟物理行为及碰撞检测。
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*/
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class PhysicsEngine {
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private:
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std::vector<engine::component::PhysicsComponent*> components_; ///< @brief 注册的物理组件容器，非拥有指针
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std::vector<engine::component::TileLayerComponent*> collision_tile_layers_; ///< @brief 注册的碰撞瓦片图层容器
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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)
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float max_speed_ = 500.0f; ///< @brief 最大速度 (像素/秒)
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/// @brief 存储本帧发生的 GameObject 碰撞对 （每次 update 开始时清空）
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std::vector<std::pair<engine::object::GameObject*, engine::object::GameObject*>> collision_pairs_;
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public:
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PhysicsEngine() = default;
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// 禁止拷贝和移动
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PhysicsEngine(const PhysicsEngine&) = delete;
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PhysicsEngine& operator=(const PhysicsEngine&) = delete;
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PhysicsEngine(PhysicsEngine&&) = delete;
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PhysicsEngine& operator=(PhysicsEngine&&) = delete;
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void registerComponent(engine::component::PhysicsComponent* component); ///< @brief 注册物理组件
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void unregisterComponent(engine::component::PhysicsComponent* component); ///< @brief 注销物理组件
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// 如果瓦片层需要进行碰撞检测则注册。（不需要则不必注册）
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void registerCollisionLayer(engine::component::TileLayerComponent* layer); ///< @brief 注册用于碰撞检测的 TileLayerComponent
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void unregisterCollisionLayer(engine::component::TileLayerComponent* layer);///< @brief 注销用于碰撞检测的 TileLayerComponent
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void update(float delta_time); ///< @brief 核心循环：更新所有注册的物理组件的状态
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void checkObjectCollisions(); ///< @brief 检测并处理对象之间的碰撞，并记录需要游戏逻辑处理的碰撞对。
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/// @brief 检测并处理游戏对象和瓦片层之间的碰撞。
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void resolveTileCollisions(engine::component::PhysicsComponent* pc, float delta_time);
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// 设置器/获取器
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void setGravity(const glm::vec2& gravity) { gravity_ = gravity; } ///< @brief 设置全局重力加速度
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const glm::vec2& getGravity() const { return gravity_; } ///< @brief 获取当前的全局重力加速度
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void setMaxSpeed(float max_speed) { max_speed_ = max_speed; } ///< @brief 设置最大速度
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float getMaxSpeed() const { return max_speed_; } ///< @brief 获取当前的最大速度
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/// @brief 获取本帧检测到的所有 GameObject 碰撞对。(此列表在每次 update 开始时清空)
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const std::vector<std::pair<engine::object::GameObject*, engine::object::GameObject*>>& getCollisionPairs() const {
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return collision_pairs_;
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};
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};
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} // namespace engine::physics
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