metaforce/Runtime/World/CFluidPlaneCPU.hpp

#pragma once

#include <memory>

#include "Runtime/GCNTypes.hpp"
#include "Runtime/World/CFluidPlane.hpp"
#include "Runtime/World/CRipple.hpp"

#include <zeus/CVector3f.hpp>

namespace metaforce {
class CFluidUVMotion;

class CFluidPlaneCPU : public CFluidPlane {
public:
  using SineTable = std::array<float, 256>;

protected:
  class CTurbulence {
    float x0_speed;
    float x4_distance;
    float x8_freqMax;
    float xc_freqMin;
    float x10_phaseMax;
    float x14_phaseMin;
    float x18_amplitudeMax;
    float x1c_amplitudeMin;
    std::unique_ptr<float[]> x20_table; // x140
    u32 x24_tableCount = 0;             // x144
    float x28_heightSelPitch = 0.f;     // x148
    float x2c_ooTurbSpeed;              // x14c
    float x30_ooTurbDistance;           // x150
    bool x34_hasTurbulence = false;     // x154
  public:
    CTurbulence(float speed, float distance, float freqMax, float freqMin, float phaseMax, float phaseMin,
                float amplitudeMax, float amplitudeMin);
    float GetHeight(float sel) const { return x20_table[(x24_tableCount - 1) & int(sel * x28_heightSelPitch)]; }
    float GetOODistance() const { return x30_ooTurbDistance; }
    float GetOOSpeed() const { return x2c_ooTurbSpeed; }
    bool HasTurbulence() const { return x34_hasTurbulence; }
  };

  CAssetId xa0_texIdBumpMap;
  CAssetId xa4_texIdEnvMap;
  CAssetId xa8_texIdEnvBumpMap;
  CAssetId xac_texId4;
  TLockedToken<CTexture> xb0_bumpMap;
  TLockedToken<CTexture> xc0_envMap;
  TLockedToken<CTexture> xd0_envBumpMap;
  TLockedToken<CTexture> xe0_lightmap;
  zeus::CVector3f xf0_bumpLightDir;
  float xfc_bumpScale;
  float x100_tileSize;
  int x104_tileSubdivisions;
  float x108_rippleResolution;
  float x10c_specularMin;
  float x110_specularMax;
  float x114_reflectionBlend;
  float x118_reflectionSize;
  float x11c_unitsPerLightmapTexel;
  CTurbulence x120_turbulence;

  u32 m_maxVertCount;
  bool m_tessellation = false;

  bool m_cachedDoubleLightmapBlend = false;
  bool m_cachedAdditive = false;

  static bool PrepareRipple(const CRipple& ripple, const CFluidPlaneRender::SPatchInfo& info,
                            CFluidPlaneRender::SRippleInfo& rippleOut);
  void ApplyTurbulence(float t, Heights& heights, const Flags& flags, const SineTable& sineWave,
                       const CFluidPlaneRender::SPatchInfo& info, const zeus::CVector3f& areaCenter) const;
  void ApplyRipple(const CFluidPlaneRender::SRippleInfo& rippleInfo, Heights& heights, Flags& flags,
                   const SineTable& sineWave, const CFluidPlaneRender::SPatchInfo& info) const;
  void ApplyRipples(const rstl::reserved_vector<CFluidPlaneRender::SRippleInfo, 32>& rippleInfos, Heights& heights,
                    Flags& flags, const SineTable& sineWave, const CFluidPlaneRender::SPatchInfo& info) const;
  static void UpdatePatchNoNormals(Heights& heights, const Flags& flags, const CFluidPlaneRender::SPatchInfo& info);
  static void UpdatePatchWithNormals(Heights& heights, const Flags& flags, const CFluidPlaneRender::SPatchInfo& info);
  bool UpdatePatch(float time, const CFluidPlaneRender::SPatchInfo& info, Heights& heights, Flags& flags,
                   const zeus::CVector3f& areaCenter, const std::optional<CRippleManager>& rippleManager, int fromX,
                   int toX, int fromY, int toY) const;

public:
  CFluidPlaneCPU(CAssetId texPattern1, CAssetId texPattern2, CAssetId texColor, CAssetId bumpMap, CAssetId envMap,
                 CAssetId envBumpMap, CAssetId lightMap, float unitsPerLightmapTexel, float tileSize,
                 u32 tileSubdivisions, EFluidType fluidType, float alpha, const zeus::CVector3f& bumpLightDir,
                 float bumpScale, const CFluidUVMotion& mot, float turbSpeed, float turbDistance, float turbFreqMax,
                 float turbFreqMin, float turbPhaseMax, float turbPhaseMin, float turbAmplitudeMax,
                 float turbAmplitudeMin, float specularMin, float specularMax, float reflectionBlend,
                 float reflectionSize, float rippleIntensity, u32 maxVertCount);
  void CreateRipple(const CRipple& ripple, CStateManager& mgr);
  void CalculateLightmapMatrix(const zeus::CTransform& areaXf, const zeus::CTransform& xf, const zeus::CAABox& aabb,
                               zeus::CMatrix4f& mtxOut) const;
  CFluidPlaneShader::RenderSetupInfo RenderSetup(const CStateManager& mgr, float, const zeus::CTransform& xf,
                                                 const zeus::CTransform& areaXf, const zeus::CAABox& aabb,
                                                 const CScriptWater* water);
  void Render(const CStateManager& mgr, float alpha, const zeus::CAABox& aabb, const zeus::CTransform& xf,
              const zeus::CTransform& areaXf, bool noNormals, const zeus::CFrustum& frustum,
              const std::optional<CRippleManager>& rippleManager, TUniqueId waterId, const bool* gridFlags,
              u32 gridDimX, u32 gridDimY, const zeus::CVector3f& areaCenter) override;
  float GetReflectionBlend() const { return x114_reflectionBlend; }
  float GetSpecularMax() const { return x110_specularMax; }
  float GetSpecularMin() const { return x10c_specularMin; }
  float GetReflectionSize() const { return x118_reflectionSize; }
  float GetBumpScale() const { return xfc_bumpScale; }
  bool HasBumpMap() const { return xb0_bumpMap.HasReference(); }
  const CTexture& GetBumpMap() const { return *xb0_bumpMap; }
  bool HasEnvMap() const { return xc0_envMap.HasReference(); }
  const CTexture& GetEnvMap() const { return *xc0_envMap; }
  bool HasEnvBumpMap() const { return xd0_envBumpMap.HasReference(); }
  const CTexture& GetEnvBumpMap() const { return *xd0_envBumpMap; }
  bool HasLightMap() const { return xe0_lightmap.HasReference(); }
  const CTexture& GetLightMap() const { return *xe0_lightmap; }
  const zeus::CVector3f& GetBumpLightDir() const { return xf0_bumpLightDir; }
  float GetTileSize() const { return x100_tileSize; }
  int GetTileSubdivisions() const { return x104_tileSubdivisions; }
  float GetRippleResolution() const { return x108_rippleResolution; }
  float GetTurbulenceHeight(float sel) const { return x120_turbulence.GetHeight(sel); }
  float GetOOTurbulenceDistance() const { return x120_turbulence.GetOODistance(); }
  float GetOOTurbulenceSpeed() const { return x120_turbulence.GetOOSpeed(); }
  bool HasTurbulence() const { return x120_turbulence.HasTurbulence(); }
};

} // namespace metaforce