SceneLoadUtil.h

#pragma once
 
#include <Core/ResourceManager/ResourceHandle.h>
#include <Core/WorldSerializer/WorldReader.h>
#include <Foundation/IO/FileSystem/FileReader.h>
#include <Foundation/Types/UniquePtr.h>
#include <Foundation/Utilities/Progress.h>
#include <GameEngine/GameEngineDLL.h>
 
using plCollectionResourceHandle = plTypedResourceHandle<class plCollectionResource>;
 
class PL_GAMEENGINE_DLL plSceneLoadUtility
{
  PL_DISALLOW_COPY_AND_ASSIGN(plSceneLoadUtility);
 
public:
  plSceneLoadUtility();
  ~plSceneLoadUtility();
 
  enum class LoadingState
  {
    NotStarted,
    Ongoing,
    FinishedSuccessfully,
    Failed,
  };
 
  LoadingState GetLoadingState() const { return m_LoadingState; }
 
  float GetLoadingProgress() const { return m_fLoadingProgress; }
 
  plStringView GetLoadingFailureReason() const { return m_sFailureReason; }
 
  void StartSceneLoading(plStringView sSceneFile, plStringView sPreloadCollectionFile);
 
  void TickSceneLoading();
 
  plUniquePtr<plWorld> RetrieveLoadedScene();
 
private:
  void LoadingFailed(const plFormatString& reason);
 
  LoadingState m_LoadingState = LoadingState::NotStarted;
  float m_fLoadingProgress = 0.0f;
  plString m_sFailureReason;
 
  plString m_sFile;
  plCollectionResourceHandle m_hPreloadCollection;
  plFileReader m_FileReader;
  plWorldReader m_WorldReader;
  plUniquePtr<plWorld> m_pWorld;
  plUniquePtr<plWorldReader::InstantiationContextBase> m_pInstantiationContext;
  plProgress m_InstantiationProgress;
};