metaforce/Runtime/Camera/CBallCamera.hpp

#pragma once

#include "CGameCamera.hpp"
#include "CCameraSpline.hpp"

namespace urde
{
class CPlayer;

class CCameraSpring
{
    float x0_k;
    float x4_k2Sqrt;
    float x8_max;
    float xc_tardis;
    float x10_dx = 0.f;
public:
    CCameraSpring(float k, float max, float tardis)
    : x0_k(k), x4_k2Sqrt(2.f * std::sqrt(k)), x8_max(max), xc_tardis(tardis) {}
    void Reset();
    float ApplyDistanceSpringNoMax(float targetX, float curX, float dt);
    float ApplyDistanceSpring(float targetX, float curX, float dt);
};

class CCameraCollider
{
    friend class CBallCamera;
    float x4_radius;
    zeus::CVector3f x8_lastLocalPos;
    zeus::CVector3f x14_localPos;
    zeus::CVector3f x20_scaledWorldPos;
    zeus::CVector3f x2c_lastWorldPos;
    CCameraSpring x38_spring;
    u32 x4c_occlusionCount = 0;
    float x50_scale;
public:
    CCameraCollider(float radius, const zeus::CVector3f& vec, const CCameraSpring& spring, float scale)
    : x4_radius(radius), x8_lastLocalPos(vec), x14_localPos(vec), x20_scaledWorldPos(vec),
      x2c_lastWorldPos(vec), x38_spring(spring), x50_scale(scale) {}
};

class CBallCamera : public CGameCamera
{
public:
    enum class EBallCameraState
    {
        Default,
        One,
        Chase,
        Boost,
        ToBall,
        FromBall
    };
    enum class EBallCameraBehaviour
    {
        Default,
        FreezeLookPosition, // Unused
        HintBallToCam,
        HintInitializePosition,
        HintFixedPosition,
        HintFixedTransform,
        PathCameraDesiredPos, // Unused
        PathCamera,
        SpindleCamera
    };
    enum class ESplineState
    {
        Invalid,
        Nav,
        Arc
    };
private:
    struct SFailsafeState
    {
        zeus::CTransform x0_playerXf;
        zeus::CTransform x30_camXf;
        zeus::CVector3f x60_lookPos;
        zeus::CVector3f x6c_behindPos;
        zeus::CVector3f x78_;
        zeus::CVector3f x84_playerPos;
        std::vector<zeus::CVector3f> x90_splinePoints;
    };

    EBallCameraBehaviour x188_behaviour = EBallCameraBehaviour::Default;
    bool x18c_24_ : 1;
    bool x18c_25_chaseAllowed : 1;
    bool x18c_26_boostAllowed : 1;
    bool x18c_27_obscureAvoidance : 1;
    bool x18c_28_volumeCollider : 1;
    bool x18c_29_clampAttitude : 1;
    bool x18c_30_clampAzimuth : 1;
    bool x18c_31_clearLOS : 1;
    bool x18d_24_prevClearLOS : 1;
    bool x18d_25_avoidGeometryFull : 1;
    bool x18d_26_lookAtBall : 1;
    bool x18d_27_forceProcessing : 1;
    bool x18d_28_obtuseDirection : 1;
    bool x18d_29_noElevationInterp : 1;
    bool x18d_30_directElevation : 1;
    bool x18d_31_overrideLookDir : 1;
    bool x18e_24_noElevationVelClamp : 1;
    bool x18e_25_noSpline : 1;
    bool x18e_26_ : 1;
    bool x18e_27_nearbyDoorClosed : 1;
    bool x18e_28_nearbyDoorClosing : 1;
    float x190_curMinDistance;
    float x194_targetMinDistance;
    float x198_maxDistance;
    float x19c_backwardsDistance;
    float x1a0_elevation;
    float x1a4_curAnglePerSecond;
    float x1a8_targetAnglePerSecond;
    float x1ac_attitudeRange = zeus::degToRad(89.f);
    float x1b0_azimuthRange = zeus::degToRad(89.f);
    zeus::CVector3f x1b4_lookAtOffset;
    zeus::CVector3f x1c0_lookPosAhead;
    zeus::CVector3f x1cc_fixedLookPos;
    zeus::CVector3f x1d8_lookPos;
    zeus::CTransform x1e4_nextLookXf;
    CCameraSpring x214_ballCameraSpring;
    CCameraSpring x228_ballCameraCentroidSpring;
    CCameraSpring x23c_ballCameraLookAtSpring;
    CCameraSpring x250_ballCameraCentroidDistanceSpring;
    std::vector<CCameraCollider> x264_smallColliders;
    std::vector<CCameraCollider> x274_mediumColliders;
    std::vector<CCameraCollider> x284_largeColliders;
    zeus::CVector3f x294_dampedPos;
    zeus::CVector3f x2a0_smallCentroid = zeus::CVector3f::skUp;
    zeus::CVector3f x2ac_mediumCentroid = zeus::CVector3f::skUp;
    zeus::CVector3f x2b8_largeCentroid = zeus::CVector3f::skUp;
    int x2c4_smallCollidersObsCount = 0;
    int x2c8_mediumCollidersObsCount = 0;
    int x2cc_largeCollidersObsCount = 0;
    int x2d0_smallColliderIt = 0;
    int x2d4_mediumColliderIt = 0;
    int x2d8_largeColliderIt = 0;
    zeus::CVector3f x2dc_prevBallPos;
    float x2e8_ballVelFlat = 0.f;
    float x2ec_maxBallVel = 0.f;
    zeus::CVector3f x2f0_ballDelta;
    zeus::CVector3f x2fc_ballDeltaFlat;
    float x308_speedFactor = 0.f;
    float x30c_speedingTime = 0.f;
    zeus::CVector3f x310_idealLookVec;
    zeus::CVector3f x31c_predictedLookPos;
    u32 x328_avoidGeomCycle = 0;
    float x32c_colliderMag = 1.f;
    float x330_clearColliderThreshold = 0.2f;
    zeus::CAABox x334_collidersAABB = zeus::CAABox::skNullBox;
    float x34c_obscuredTime = 0.f;
    CMaterialList x350_obscuringMaterial = {EMaterialTypes::NoStepLogic};
    float x358_unobscureMag = 0.f;
    zeus::CVector3f x35c_splineIntermediatePos;
    TUniqueId x368_obscuringObjectId = kInvalidUniqueId;
    ESplineState x36c_splineState = ESplineState::Invalid;
    bool x370_24_reevalSplineEnd : 1;
    float x374_splineCtrl = 0.f;
    float x378_splineCtrlRange;
    CCameraSpline x37c_camSpline;
    CMaterialList x3c8_collisionExcludeList = {EMaterialTypes::NoStepLogic};
    bool x3d0_24_camBehindFloorOrWall : 1;
    float x3d4_elevInterpTimer = 0.f;
    float x3d8_elevInterpStart = 0.f;
    TUniqueId x3dc_tooCloseActorId = kInvalidUniqueId;
    float x3e0_tooCloseActorDist = 10000.f;
    bool x3e4_pendingFailsafe = false;
    float x3e8_ = 0.f;
    float x3ec_ = 0.f;
    float x3f0_ = 0.f;
    float x3f4_ = 2.f;
    float x3f8_ = 0.f;
    float x3fc_ = 0.f;
    EBallCameraState x400_state = EBallCameraState::Default;
    float x404_chaseElevation;
    float x408_chaseDistance;
    float x40c_chaseAnglePerSecond;
    zeus::CVector3f x410_chaseLookAtOffset;
    CCameraSpring x41c_ballCameraChaseSpring;
    float x430_boostElevation;
    float x434_boostDistance;
    float x438_boostAnglePerSecond;
    zeus::CVector3f x43c_boostLookAtOffset;
    CCameraSpring x448_ballCameraBoostSpring;
    zeus::CVector3f x45c_overrideBallToCam;
    float x468_conservativeDoorCamDistance;
    TUniqueId x46c_collisionActorId = kInvalidUniqueId;
    float x470_clampVelTimer = 0.f;
    float x474_clampVelRange = 0.f;
    u32 x478_shortMoveCount = 0;
    std::unique_ptr<SFailsafeState> x47c_failsafeState;
    std::unique_ptr<u32> x480_;

    void SetupColliders(std::vector<CCameraCollider>& out, float xMag, float zMag, float radius, int count,
                        float k, float max, float startAngle);
    void BuildSplineNav(CStateManager& mgr);
    void BuildSplineArc(CStateManager& mgr);
    bool ShouldResetSpline(CStateManager& mgr) const;
    void UpdatePlayerMovement(float dt, CStateManager& mgr);
    void UpdateTransform(const zeus::CVector3f& lookDir, const zeus::CVector3f& pos, float dt, CStateManager& mgr);
    zeus::CVector3f ConstrainYawAngle(const CPlayer& player, float distance, float yawSpeed, float dt,
                                      CStateManager& mgr) const;
    void CheckFailsafe(float dt, CStateManager& mgr);
    void UpdateObjectTooCloseId(CStateManager& mgr);
    void UpdateAnglePerSecond(float dt);
    void UpdateUsingPathCameras(float dt, CStateManager& mgr);
    zeus::CVector3f GetFixedLookTarget(const zeus::CVector3f& hintToLookDir, CStateManager& mgr) const;
    void UpdateUsingFixedCameras(float dt, CStateManager& mgr);
    zeus::CVector3f ComputeVelocity(const zeus::CVector3f& curVel, const zeus::CVector3f& posDelta) const;
    zeus::CVector3f TweenVelocity(const zeus::CVector3f& curVel, const zeus::CVector3f& newVel, float rate, float dt);
    zeus::CVector3f MoveCollisionActor(const zeus::CVector3f& pos, float dt, CStateManager& mgr);
    void UpdateUsingFreeLook(float dt, CStateManager& mgr);
    zeus::CVector3f InterpolateCameraElevation(const zeus::CVector3f& camPos, float dt);
    zeus::CVector3f CalculateCollidersCentroid(const std::vector<CCameraCollider>& colliderList, int numObscured) const;
    zeus::CVector3f ApplyColliders();
    void UpdateColliders(const zeus::CTransform& xf, std::vector<CCameraCollider>& colliderList, int& it, int count,
                         float tolerance, const rstl::reserved_vector<TUniqueId, 1024>& nearList, float dt,
                         CStateManager& mgr);
    zeus::CVector3f AvoidGeometry(const zeus::CTransform& xf, const rstl::reserved_vector<TUniqueId, 1024>& nearList,
                                  float dt, CStateManager& mgr);
    zeus::CVector3f AvoidGeometryFull(const zeus::CTransform& xf,
                                      const rstl::reserved_vector<TUniqueId, 1024>& nearList,
                                      float dt, CStateManager& mgr);
    zeus::CAABox CalculateCollidersBoundingBox(const std::vector<CCameraCollider>& colliderList,
                                               CStateManager& mgr) const;
    int CountObscuredColliders(const std::vector<CCameraCollider>& colliderList) const;
    void UpdateCollidersDistances(std::vector<CCameraCollider>& colliderList, float xMag, float zMag, float angOffset);
    void UpdateUsingColliders(float dt, CStateManager& mgr);
    void UpdateUsingSpindleCameras(float dt, CStateManager& mgr);
    zeus::CVector3f ClampElevationToWater(zeus::CVector3f& pos, CStateManager& mgr) const;
    void UpdateTransitionFromBallCamera(CStateManager& mgr);
    void UpdateUsingTransitions(float dt, CStateManager& mgr);
    zeus::CTransform UpdateCameraPositions(float dt, const zeus::CTransform& oldXf, const zeus::CTransform& newXf);
    static zeus::CVector3f GetFailsafeSplinePoint(const std::vector<zeus::CVector3f>& points, float t);
    bool CheckFailsafeFromMorphBallState(CStateManager& mgr) const;
    bool SplineIntersectTest(CMaterialList& intersectMat, CStateManager& mgr) const;
    void ActivateFailsafe(float dt, CStateManager& mgr);
    bool ConstrainElevationAndDistance(float& elevation, float& distance, float dt, CStateManager& mgr);
    zeus::CVector3f FindDesiredPosition(float distance, float elevation, const zeus::CVector3f& dir,
                                        CStateManager& mgr, bool fullTest);
    static bool DetectCollision(const zeus::CVector3f& from, const zeus::CVector3f& to, float radius,
                                float& d, CStateManager& mgr);
    void TeleportColliders(std::vector<CCameraCollider>& colliderList, const zeus::CVector3f& pos);
    static bool CheckTransitionLineOfSight(const zeus::CVector3f& eyePos, const zeus::CVector3f& behindPos,
                                           float& eyeToOccDist, float colRadius, CStateManager& mgr);

public:
    CBallCamera(TUniqueId uid, TUniqueId watchedId, const zeus::CTransform& xf,
                float fovy, float znear, float zfar, float aspect);

    void Accept(IVisitor& visitor);
    void AcceptScriptMsg(EScriptObjectMessage msg, TUniqueId objId, CStateManager& stateMgr);
    void ProcessInput(const CFinalInput& input, CStateManager& mgr);
    void Reset(const zeus::CTransform&, CStateManager& mgr);
    void Render(const CStateManager& mgr) const;
    EBallCameraBehaviour GetBehaviour() const { return x188_behaviour; }
    EBallCameraState GetState() const { return x400_state; }
    void SetState(EBallCameraState state, CStateManager& mgr);
    void Think(float dt, CStateManager& mgr);
    bool TransitionFromMorphBallState(CStateManager& mgr);
    TUniqueId GetTooCloseActorId() const { return x3dc_tooCloseActorId; }
    float GetTooCloseActorDistance() const { return x3e0_tooCloseActorDist; }
    void TeleportCamera(const zeus::CVector3f& pos, CStateManager& mgr);
    void TeleportCamera(const zeus::CTransform& xf, CStateManager& mgr);
    const zeus::CVector3f& GetLookPos() const { return x1d8_lookPos; }
    void ResetToTweaks(CStateManager& mgr);
    void UpdateLookAtPosition(float dt, CStateManager& mgr);
    zeus::CTransform UpdateLookDirection(const zeus::CVector3f& dir, CStateManager& mgr);
    void SetClampVelTimer(float f) { x470_clampVelTimer = f; }
    void SetClampVelRange(float f) { x474_clampVelRange = f; }
    void ApplyCameraHint(CStateManager& mgr);
    void ResetPosition(CStateManager& mgr);
    void DoorClosed(TUniqueId doorId);
    void DoorClosing(TUniqueId doorId);
    const zeus::CVector3f& GetFixedLookPos() const { return x1cc_fixedLookPos; }

    static bool IsBallNearDoor(const zeus::CVector3f& pos, CStateManager& mgr);
};

}