system.h

#pragma once
 
#include <cstdint>
 
namespace Vkm::Engine {
 
class WindowManager;
class Clock;
class HostChrome;
 
class Scene;
class ResourceManager;
class EventBus;
class InputMap;
class NetSession;
class PoseBuffer;
struct RenderSettings;
struct HostView;
struct Visibility;
struct UIDrawData;
struct SplashFrame;
struct LiveParticles;

enum class SystemStage : uint8_t {
    Input        = 0,
    Simulation   = 1,
    Transform    = 2,
    Visibility   = 3,
    Render       = 4,
    Editor       = 5,
 
    Count  
};

struct FrameContext {
    Scene&           scene;
    ResourceManager& resources;
 
    Clock&           clock;
    EventBus&        events;
    WindowManager&   window;
    InputMap&        input;
    NetSession&      net;
    HostChrome&      chrome;
    RenderSettings&  render;
 
    const HostView*      hostView   = nullptr;  
    const Visibility*    visibility = nullptr;  
    const PoseBuffer*    poses      = nullptr;  
    const UIDrawData*    ui         = nullptr;  
    const SplashFrame*   splash     = nullptr;  
    const LiveParticles* particles  = nullptr;  
};

class System {
    public:
        virtual ~System() = default;
 
        System(const System& other) = delete;
        System& operator=(const System& other) = delete;
 
        System(System && other) = delete;
        System& operator=(System && other) = delete;
 
    public:
        virtual bool isReplayed() const { return false; }

        virtual void init(FrameContext& ctx) {}

        virtual void shutdown() {}

        virtual void update(FrameContext& ctx) {}

        virtual void fixedUpdate(FrameContext& ctx) {}
 
    protected:
        System() = default;
};
 
} // namespace Vkm::Engine