CWE-ou-minkata/Sources/Plasma/PubUtilLib/plDrawable/plCutter.h

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

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Additional permissions under GNU GPL version 3 section 7

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*==LICENSE==*/

#ifndef plCutter_inc
#define plCutter_inc

#include "pnFactory/plCreatable.h"

#include "hsGeometry3.h"
#include "hsTemplates.h"
#include "hsBounds.h"
#include "plIntersect/plVolumeIsect.h"
#include "hsColorRGBA.h"

struct hsPoint3;
struct hsVector3;

class plPrintCollect;
class plAccTriIterator;
class plAccessSpan;

class plCutoutHit
{
public:
    hsPoint3    fPos;
    hsVector3   fNorm;
};

class plCutoutVtx
{
public:
    plCutoutVtx& Init(const hsPoint3& p, const hsVector3& n, const hsColorRGBA& c) { fPos = p; fNorm = n; fColor = c; return *this; }

    hsPoint3    fPos;
    hsVector3   fNorm;
    hsColorRGBA fColor;
    hsPoint3    fUVW;
};

class plCutoutPoly
{
public:
    hsTArray<plCutoutVtx>       fVerts;

    bool                        fBaseHasAlpha;
};

class plCutoutMiniVtx
{
public:
    hsPoint3    fPos;
    hsPoint3    fUVW;
};

class plFlatGridMesh
{
public:
    hsTArray<plCutoutMiniVtx>   fVerts;
    hsTArray<uint16_t>            fIdx;

    void Reset() { fVerts.SetCount(0); fIdx.SetCount(0); }
};

class plCutter : public plCreatable
{
protected:

    // Permanent attributes
    float fLengthU;
    float fLengthV;
    float fLengthW;

    // Internal cached stuff
    float        fDistU;
    float        fDistV;
    float        fDistW;
    hsVector3       fDirU;
    hsVector3       fDirV;
    hsVector3       fDirW;
    hsVector3       fBackDir;

    hsBounds3Ext    fWorldBounds;
    plBoundsIsect   fIsect;

    void            IConstruct(hsTArray<plCutoutPoly>& dst, hsTArray<plCutoutVtx>& poly, bool baseHasAlpha) const;
    bool            IPolyClip(hsTArray<plCutoutVtx>& poly, const hsPoint3 vPos[]) const;
    
    inline void     ICutoutVtxHiU(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;
    inline void     ICutoutVtxHiV(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;
    inline void     ICutoutVtxHiW(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;
    inline void     ICutoutVtxLoU(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;
    inline void     ICutoutVtxLoV(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;
    inline void     ICutoutVtxLoW(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;
    inline void     ICutoutVtxMidV(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;
    inline void     ICutoutVtxMidU(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;
    inline void     ICutoutVtxMidW(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;

    bool            IFindHitPoint(const hsTArray<plCutoutVtx>& inPoly, plCutoutHit& hit) const;

    inline void     ISetPosNorm(float parm, const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;

    void            ICutoutTransformed(plAccessSpan& src, hsTArray<plCutoutPoly>& dst) const;
    void            ICutoutConstHeight(plAccessSpan& src, hsTArray<plCutoutPoly>& dst) const;
    void            ICutoutTransformedConstHeight(plAccessSpan& src, hsTArray<plCutoutPoly>& dst) const;


public:
    plCutter() {}
    virtual ~plCutter() {}

    CLASSNAME_REGISTER( plCutter );
    GETINTERFACE_ANY( plCutter, plCreatable );


    virtual void Read(hsStream* stream, hsResMgr* mgr);
    virtual void Write(hsStream* stream, hsResMgr* mgr);

    bool        FindHitPoints(const hsTArray<plCutoutPoly>& src, hsTArray<plCutoutHit>& hits) const;
    bool        FindHitPointsConstHeight(const hsTArray<plCutoutPoly>& src, hsTArray<plCutoutHit>& hits, float height) const;

    void        Set(const hsPoint3& pos, const hsVector3& dir, const hsVector3& out, bool flip=false);

    void        Cutout(plAccessSpan& src, hsTArray<plCutoutPoly>& dst) const;
    bool        CutoutGrid(int nWid, int nLen, plFlatGridMesh& dst) const;

    void        SetLength(const hsVector3& s) { fLengthU = s.fX; fLengthV = s.fY; fLengthW = s.fZ; }
    float    GetLengthU() const { return fLengthU; }
    float    GetLengthV() const { return fLengthV; }
    float    GetLengthW() const { return fLengthW; }

    const hsBounds3Ext& GetWorldBounds() const { return fWorldBounds; }
    plBoundsIsect& GetIsect() { return fIsect; }
    hsVector3 GetBackDir() const { return fBackDir; }

    static bool MakeGrid(int nWid, int nLen, const hsPoint3& center, const hsVector3& halfU, const hsVector3& halfV, plFlatGridMesh& grid);

};

#endif // plCutter_inc