metaforce/Runtime/Particle/CParticleSwoosh.hpp

#ifndef __URDE_CPARTICLESWOOSH_HPP__
#define __URDE_CPARTICLESWOOSH_HPP__

#include "CParticleGen.hpp"
#include "CToken.hpp"
#include "CRandom16.hpp"
#include "Graphics/CTexture.hpp"
#include "Graphics/CLineRenderer.hpp"
#include "CUVElement.hpp"
#include "DataSpec/DNACommon/GX.hpp"
#include "Graphics/Shaders/CParticleSwooshShaders.hpp"

namespace urde
{
class CSwooshDescription;

class CParticleSwoosh : public CParticleGen
{
    friend struct OGLParticleSwooshDataBindingFactory;
    friend struct VulkanParticleSwooshDataBindingFactory;
    friend struct D3DParticleSwooshDataBindingFactory;
    friend struct MetalParticleSwooshDataBindingFactory;

    struct SSwooshData
    {
        bool x0_active;
        float x4_leftRad;
        float x8_rightRad;
        zeus::CVector3f xc_translation; // Updated by system's velocity sources or user code
        zeus::CVector3f x18_offset; // Updated by POFS once per system update (also resets x24_useOffset)
        zeus::CVector3f x24_useOffset; // Combination of POFS and NPOS, once per particle instance
        float x30_irot; // Rotation bias once per system update
        float x34_rotm; // Rotation bias once per particle instance
        zeus::CTransform x38_orientation; // Updated by user code
        int x68_frame; // Frame index of evaluated data
        zeus::CColor x6c_color; // Updated by COLR
        int x70_startFrame;
        zeus::CVector3f x74_velocity;

        SSwooshData(const zeus::CVector3f& translation, const zeus::CVector3f& offset, float irot, float rotm,
                    int startFrame, bool active, const zeus::CTransform& orient, const zeus::CVector3f& vel,
                    float leftRad, float rightRad, const zeus::CColor& color)
        : x0_active(active), x4_leftRad(leftRad), x8_rightRad(rightRad), xc_translation(translation),
          x18_offset(offset), x24_useOffset(offset), x30_irot(irot), x34_rotm(rotm), x38_orientation(orient),
          x6c_color(color), x70_startFrame(startFrame), x74_velocity(vel) {}
    };

    TLockedToken<CSwooshDescription> x1c_desc;
    u32 x28_curFrame = 0;
    int x2c_PSLT = 0;
    double x30_curTime = 0.0;
    zeus::CVector3f x38_translation;
    zeus::CTransform x44_orientation;
    zeus::CTransform x74_invOrientation;
    zeus::CVector3f xa4_globalTranslation;
    zeus::CTransform xb0_globalOrientation;
    zeus::CVector3f xe0_globalScale = {1.f, 1.f, 1.f};
    zeus::CTransform xec_scaleXf;
    zeus::CTransform x11c_invScaleXf;
    zeus::CVector3f x14c_localScale = {1.f, 1.f, 1.f};
    u32 x158_curParticle = 0;
    std::vector<SSwooshData> x15c_swooshes;
    std::vector<zeus::CVector3f> x16c_p0;
    std::vector<zeus::CVector3f> x17c_p1;
    std::vector<zeus::CVector3f> x18c_p2;
    std::vector<zeus::CVector3f> x19c_p3;
    u32 x1ac_particleCount = 0;
    int x1b0_SPLN = 0;
    int x1b4_LENG = 0;
    int x1b8_SIDE = 0;
    GX::Primitive x1bc_prim;
    CRandom16 x1c0_rand;
    float x1c4_ = 0.f;
    float x1c8_ = 0.f;
    float x1cc_TSPN;

    union
    {
        struct
        {
            bool x1d0_24_emitting : 1;
            bool x1d0_25_AALP : 1;
            bool x1d0_26_forceOneUpdate : 1;
            bool x1d0_27_renderGaps : 1;
            bool x1d0_28_LLRD : 1;
            bool x1d0_29_VLS1 : 1;
            bool x1d0_30_VLS2 : 1;
            bool x1d0_31_constantTex : 1;
            bool x1d1_24_constantUv : 1;
        };
        u32 _dummy = 0;
    };

    SUVElementSet x1d4_uvs = {};
    CTexture* x1e4_tex = nullptr;
    float x1e8_uvSpan = 1.f;
    int x1ec_TSPN = 0;
    zeus::CVector3f x1f0_aabbMin;
    zeus::CVector3f x1fc_aabbMax;
    float x208_maxRadius = 0.f;
    zeus::CColor x20c_moduColor = zeus::CColor::skWhite;

    boo::ObjToken<boo::IShaderDataBinding> m_dataBind;
    boo::ObjToken<boo::IGraphicsBufferD> m_vertBuf;
    boo::ObjToken<boo::IGraphicsBufferD> m_uniformBuf;
    std::unique_ptr<CLineRenderer> m_lineRenderer;
    std::vector<CParticleSwooshShaders::Vert> m_cachedVerts;

    static int g_ParticleSystemAliveCount;

    bool IsValid() const { return x1b4_LENG >= 2 && x1b8_SIDE >= 2; }
    void UpdateMaxRadius(float r);
    void UpdateBounds(const zeus::CVector3f& pos);
    float GetLeftRadius(int i) const;
    float GetRightRadius(int i) const;
    void UpdateSwooshTranslation(const zeus::CVector3f& translation);
    void UpdateTranslationAndOrientation();

    static zeus::CVector3f GetSplinePoint(const zeus::CVector3f& p0, const zeus::CVector3f& p1,
                                          const zeus::CVector3f& p2, const zeus::CVector3f& p3, float t);
    int WrapIndex(int i) const;
    void RenderNSidedSpline();
    void RenderNSidedNoSpline();
    void Render3SidedSolidSpline();
    void Render3SidedSolidNoSplineNoGaps();
    void Render2SidedSpline();
    void Render2SidedNoSplineGaps();
    void Render2SidedNoSplineNoGaps();

public:
    CParticleSwoosh(const TToken<CSwooshDescription>& desc, int);
    ~CParticleSwoosh();

    CSwooshDescription* GetDesc() { return x1c_desc.GetObj(); }

    bool Update(double);
    void Render(const CActorLights* = nullptr);
    void SetOrientation(const zeus::CTransform&);
    void SetTranslation(const zeus::CVector3f&);
    void SetGlobalOrientation(const zeus::CTransform&);
    void SetGlobalTranslation(const zeus::CVector3f&);
    void SetGlobalScale(const zeus::CVector3f&);
    void SetLocalScale(const zeus::CVector3f&);
    void SetParticleEmission(bool);
    void SetModulationColor(const zeus::CColor&);
    const zeus::CTransform& GetOrientation() const;
    const zeus::CVector3f& GetTranslation() const;
    const zeus::CTransform& GetGlobalOrientation() const;
    const zeus::CVector3f& GetGlobalTranslation() const;
    const zeus::CVector3f& GetGlobalScale() const;
    const zeus::CColor& GetModulationColor() const;
    bool IsSystemDeletable() const;
    std::experimental::optional<zeus::CAABox> GetBounds() const;
    u32 GetParticleCount() const;
    bool SystemHasLight() const;
    CLight GetLight() const;
    bool GetParticleEmission() const;
    void DestroyParticles();
    void Reset() {}
    FourCC Get4CharId() const { return FOURCC('SWHC'); }
    void SetRenderGaps(bool r) { x1d0_27_renderGaps = r; }

    void DoWarmupUpdate()
    {
        x1d0_26_forceOneUpdate = true;
        Update(0.0);
    }

    void DoElectricWarmup()
    {
        for (int i=0 ; i<x15c_swooshes.size() ; ++i)
        {
            x1d0_26_forceOneUpdate = true;
            Update(0.0);
        }
    }

    void DoElectricCreate(const std::vector<zeus::CVector3f>& offsets)
    {
        u32 curIdx = x158_curParticle;
        for (int i=0 ; i<x15c_swooshes.size() ; ++i)
        {
            curIdx = u32((curIdx + 1) % x15c_swooshes.size());
            x15c_swooshes[curIdx].xc_translation = offsets[i];
        }
    }

    void DoGrappleWarmup()
    {
        for (int i=0 ; i<x15c_swooshes.size()-1 ; ++i)
        {
            x1d0_26_forceOneUpdate = true;
            Update(0.0);
        }
    }

    void DoGrappleUpdate(const zeus::CVector3f& beamGunPos, const zeus::CTransform& rotation, float anglePhase,
                         float xAmplitude, float zAmplitude, const zeus::CVector3f& swooshSegDelta)
    {
        float rot = x15c_swooshes.back().x30_irot;
        zeus::CVector3f trans = beamGunPos;
        for (int i=0 ; i<x15c_swooshes.size() ; ++i)
        {
            SSwooshData& data = x15c_swooshes[i];
            zeus::CVector3f vec;
            if (i > 0)
                vec = rotation * zeus::CVector3f(std::cos(i + anglePhase) * xAmplitude, 0.f,
                                                 std::sin(float(i)) * zAmplitude);
            data.xc_translation = trans + vec;
            trans += swooshSegDelta;
            std::swap(rot, data.x30_irot);
        }
    }

    void DoSpiderBallWarmup(zeus::CVector3f& translation, const zeus::CVector3f& transInc)
    {
        SetOrientation(zeus::lookAt(zeus::CVector3f::skZero, transInc));
        for (int i=0 ; i<6 ; ++i)
        {
            SetTranslation(translation);
            x1d0_26_forceOneUpdate = true;
            Update(0.0);
            translation += transInc;
        }
    }
};

}

#endif // __URDE_CPARTICLESWOOSH_HPP__