physics_manager.h

#pragma once
#include "game_globals.h"
#include "engine/component.h"
#include "engine/entity.h"
#include "maths/angle.h"
#include "maths/vec2.h"
 
#include <SFML/System/Time.hpp>
 
#include "utils/action_utility.h"
 
namespace game
{
enum class BodyType
{
    DYNAMIC,
    STATIC
};
 
struct Body
{
    core::Vec2f position = core::Vec2f::zero();
    core::Vec2f velocity = core::Vec2f::zero();
    core::Degree angularVelocity = core::Degree(0.0f);
    core::Degree rotation = core::Degree(0.0f);
    BodyType bodyType = BodyType::DYNAMIC;
};
 
struct Box
{
    core::Vec2f extends = core::Vec2f::one();
    bool isTrigger = false;
};
 
class OnTriggerInterface
{
public:
    virtual ~OnTriggerInterface() = default;
    virtual void OnTrigger(core::Entity entity1, core::Entity entity2) = 0;
};
 
class BodyManager : public core::ComponentManager<Body, static_cast<core::EntityMask>(core::ComponentType::BODY2D)>
{
public:
    using ComponentManager::ComponentManager;
};
 
class BoxManager : public core::ComponentManager<Box, static_cast<core::EntityMask>(core::ComponentType::BOX_COLLIDER2D)>
{
public:
    using ComponentManager::ComponentManager;
};
 
class PhysicsManager
{
public:
    explicit PhysicsManager(core::EntityManager& entityManager);
    void FixedUpdate(sf::Time dt);
    [[nodiscard]] const Body& GetBody(core::Entity entity) const;
    void SetBody(core::Entity entity, const Body& body);
    void AddBody(core::Entity entity);
 
    void AddBox(core::Entity entity);
    void SetBox(core::Entity entity, const Box& box);
    [[nodiscard]] const Box& GetBox(core::Entity entity) const;
    void RegisterTriggerListener(OnTriggerInterface& onTriggerInterface);
    void CopyAllComponents(const PhysicsManager& physicsManager);
private:
    core::EntityManager& entityManager_;
    BodyManager bodyManager_;
    BoxManager boxManager_;
    core::Action<core::Entity, core::Entity> onTriggerAction_;
};
 
}