metaforce/Runtime/Particle/CParticleDataFactory.hpp

#pragma once

#include <memory>
#include <vector>

#include "Runtime/CFactoryMgr.hpp"
#include "Runtime/CToken.hpp"
#include "Runtime/Streams/IOStreams.hpp"
#include "Runtime/IObj.hpp"
#include "Runtime/RetroTypes.hpp"
#include "Runtime/Graphics/CModel.hpp"

namespace metaforce {
class CColorElement;
class CElectricDescription;
class CEmitterElement;
class CGenDescription;
class CIntElement;
class CModVectorElement;
class CRealElement;
class CSimplePool;
class CSwooshDescription;
class CUVElement;
class CVParamTransfer;
class CVectorElement;

template <typename T>
struct STokenDesc {
  std::optional<TLockedToken<T>> x0_res;
  STokenDesc() = default;
  STokenDesc(CToken&& tok) : x0_res(std::move(tok)) {}
  void Load() {
    if (x0_res) {
      x0_res->GetObj();
    }
  }
  explicit operator bool() const { return x0_res.has_value(); }
  auto* GetObj() { return x0_res ? x0_res->GetObj() : nullptr; }
  const auto* GetObj() const { return x0_res ? x0_res->GetObj() : nullptr; }
  auto& operator*() { return *x0_res; }
  const auto& operator*() const { return *x0_res; }
  auto& operator->() { return *x0_res; }
  const auto& operator->() const { return *x0_res; }
};

using SParticleModel = STokenDesc<CModel>;
using SChildGeneratorDesc = STokenDesc<CGenDescription>;
using SSwooshGeneratorDesc = STokenDesc<CSwooshDescription>;
using SElectricGeneratorDesc = STokenDesc<CElectricDescription>;

class CParticleDataFactory {
  friend class CDecalDataFactory;
  friend class CCollisionResponseData;
  friend class CParticleElectricDataFactory;
  friend class CParticleSwooshDataFactory;
  friend class CProjectileWeaponDataFactory;

  static SParticleModel GetModel(CInputStream& in, CSimplePool* resPool);
  static SChildGeneratorDesc GetChildGeneratorDesc(CAssetId res, CSimplePool* resPool,
                                                   const std::vector<CAssetId>& tracker);
  static SChildGeneratorDesc GetChildGeneratorDesc(CInputStream& in, CSimplePool* resPool,
                                                   const std::vector<CAssetId>& tracker);
  static SSwooshGeneratorDesc GetSwooshGeneratorDesc(CInputStream& in, CSimplePool* resPool);
  static SElectricGeneratorDesc GetElectricGeneratorDesc(CInputStream& in, CSimplePool* resPool);
  static std::unique_ptr<CUVElement> GetTextureElement(CInputStream& in, CSimplePool* resPool);
  static std::unique_ptr<CColorElement> GetColorElement(CInputStream& in);
  static std::unique_ptr<CModVectorElement> GetModVectorElement(CInputStream& in);
  static std::unique_ptr<CEmitterElement> GetEmitterElement(CInputStream& in);
  static std::unique_ptr<CVectorElement> GetVectorElement(CInputStream& in);
  static std::unique_ptr<CRealElement> GetRealElement(CInputStream& in);
  static std::unique_ptr<CIntElement> GetIntElement(CInputStream& in);

  static float GetReal(CInputStream& in);
  static s32 GetInt(CInputStream& in);
  static bool GetBool(CInputStream& in);
  static FourCC GetClassID(CInputStream& in);
  static std::unique_ptr<CGenDescription> CreateGeneratorDescription(CInputStream& in, std::vector<CAssetId>& tracker,
                                                                     CAssetId resId, CSimplePool* resPool);
  static bool CreateGPSM(CGenDescription* fillDesc, CInputStream& in, std::vector<CAssetId>& tracker,
                         CSimplePool* resPool);
  static void LoadGPSMTokens(CGenDescription* desc);

public:
  static std::unique_ptr<CGenDescription> GetGeneratorDesc(CInputStream& in, CSimplePool* resPool);
};

CFactoryFnReturn FParticleFactory(const SObjectTag& tag, CInputStream& in, const CVParamTransfer& vparms,
                                  CObjectReference* selfRef);

} // namespace metaforce

// FIXME hacky workaround for MSVC; these need to be complete types
// but introduce circular dependencies if included at the start
#include "Runtime/Particle/CGenDescription.hpp"
#include "Runtime/Particle/CSwooshDescription.hpp"
#include "Runtime/Particle/CElectricDescription.hpp"