ObjectCrab.hh

#pragma once
 
#include "game/field/obj/ObjectCollidable.hh"
 
namespace Field {
 
class ObjectCrab final : public ObjectCollidable {
public:
    ObjectCrab(const System::MapdataGeoObj &params);
    ~ObjectCrab() override;
 
    void init() override;
    void calc() override;
 
    [[nodiscard]] u32 loadFlags() const override {
        return 1;
    }
 
private:
    enum class State {
        Walking = 0,
        Still = 1,
        Deactivated = 2,
        Resurfacing = 3,
    };
 
    enum class StatePhase {
        Start = 0,
        Middle = 1,
        End = 2,
    };
 
    enum class StateResult {
        Walking = 0,
        Middle = 1,
        BeginWalking = 2,
    };
 
    bool calcRail();
    StateResult calcState();
 
    void calcCurRot(const EGG::Vector3f &rot);
    void calcTransMat(const EGG::Vector3f &rot);
 
    const f32 m_vel;
    u32 m_stillDuration;
    u32 m_stillFrame;
    bool m_still;
    const bool m_backwards;
    EGG::Vector3f m_curRot;
    State m_state;
    StatePhase m_statePhase;
 
    // In the base game, there is a m_timer member variable at offset 0xcc which ends up resulting
    // in the calc function being run only once during the intro timer.
    bool m_introCalc;
 
    static constexpr f32 YAW = F_PI / 2.0f;
    STATIC_ASSERT(YAW == 1.5707964f);
    static constexpr EGG::Vector3f INIT_ROT = EGG::Vector3f(0.0f, YAW, 0.0f);
 
    static constexpr u32 COUNT = 3;
};
 
} // namespace Field