CWE-ou-minkata/Sources/Plasma/PubUtilLib/plInterp/plAnimPath.h

/*==LICENSE==*

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*==LICENSE==*/

#ifndef plAnimPath_inc
#define plAnimPath_inc

#include "hsTemplates.h"
#include "hsGeometry3.h"
#include "hsMatrix44.h"
#include "plTransform/hsAffineParts.h"
#include "pnFactory/plCreatable.h"

class plCompoundController;

class plAnimPath : public plCreatable
{
public:
    enum Flags
    {
        kNone           = 0x0,
        kFavorFwdSearch = 0x1,      // only move fwd on the curve when searching
        kFavorBwdSearch = 0x2,      // only move bwd on the curve when searching
        kCalcPosOnly    = 0x4,      // only compute pos when calling SetCurTime()
        kFarthest       = 0x8,
        kWrap           = 0x10,
        kIncrement      = 0x20,     // find the nearest / farthest point, but increment toward it
    };
protected:
    // The final product info
    hsMatrix44                  fXform;
    hsPoint3                    fPos;
    hsVector3                   fVel;
    hsVector3                   fAccel;
    float                    fTime; // presumably seconds

    // The paramters (and options) for this curve.
    uint32_t                      fAnimPathFlags;     // currently set at runtime only
    float                    fMinDistSq;
    float                    fLength; // presumably seconds

    // Controller stuff only works in local space.
    hsMatrix44                  fLocalToWorld;
    hsMatrix44                  fWorldToLocal;

    // Bounding sphere available for ignoring out of range
    hsPoint3                    fCenter;
    float                    fRadius;

    plCompoundController*       fController;

    hsAffineParts               fParts;

    // These are temps during a search. They're here to avoid recalc.
    mutable float                    fLastTime;
    mutable float                    fLastDistSq;
    mutable float                    fThisTime;
    mutable float                    fThisDistSq;
    mutable float                    fNextTime;
    mutable float                    fNextDistSq;
    mutable float                    fDelTime;
    mutable hsPoint3                    fPrevPos, fCurPos;

    void                        ICalcBounds();
    float                    ICalcTotalLength();
    float                    IShiftFore(hsPoint3 &pt) const;
    float                    IShiftBack(hsPoint3 &pt) const;
    float                    ISubDivFore(hsPoint3 &pt) const;
    float                    ISubDivBack(hsPoint3 &pt) const;
    void                        IInitInterval(float time, float delTime, hsPoint3 &pt) const;
    float                    ICheckInterval(hsPoint3 &pt) const;
    float                    IBestTime() const { return fLastDistSq < fThisDistSq 
                                                        ? (fLastDistSq < fNextDistSq 
                                                            ? fLastTime
                                                            : fNextTime)
                                                        : (fThisDistSq < fNextDistSq
                                                            ? fThisTime
                                                            : fNextTime); }

    // Visualization helper
    void IMakeSegment(hsTArray<uint16_t>& idx, hsTArray<hsPoint3>& pos,
                                  hsPoint3& p1, hsPoint3& p2);
    
    // For computing arclen
    struct ArcLenDeltaInfo
    {
        float    fT;
        float    fArcLenDelta;   // arc len distance from prev sample point (array entry)
        ArcLenDeltaInfo(float t, float del) : fT(t),fArcLenDelta(del) {}
        ArcLenDeltaInfo() : fT(0),fArcLenDelta(0) {}
    };
    hsTArray<ArcLenDeltaInfo>   fArcLenDeltas;
public:
    plAnimPath();
    virtual ~plAnimPath();

    CLASSNAME_REGISTER( plAnimPath );
    GETINTERFACE_ANY( plAnimPath, plCreatable );
    
    void Reset();

    void SetTransform(const hsMatrix44& l2w, const hsMatrix44& w2l);
    const hsMatrix44& GetLocalToWorld() const { return fLocalToWorld; }
    const hsMatrix44& GetWorldToLocal() const { return fWorldToLocal; }

    // Visualization helper
    void MakeDrawList(hsTArray<uint16_t>& idx, hsTArray<hsPoint3>& pos);

    void SetAnimPathFlags(uint32_t f) { fAnimPathFlags=f; }
    uint32_t GetAnimPathFlags() const { return fAnimPathFlags; }

    void SetWrap(bool on) { if(on)fAnimPathFlags |= kWrap; else fAnimPathFlags &= ~kWrap; }
    bool GetWrap() const { return 0 != (fAnimPathFlags & kWrap); }

    void SetFarthest(bool on) { if(on)fAnimPathFlags |= kFarthest; else fAnimPathFlags &= ~kFarthest; }
    bool GetFarthest() const { return 0 != (fAnimPathFlags & kFarthest); }

    void SetCurTime(float t, uint32_t calcFlags=0);
    float GetCurTime() const { return fTime; }

    void SetController(plCompoundController* tmc);
    plCompoundController* GetController() const { return fController; }
    float GetLength() const { return fLength; } // seconds

    void SetMinDistance(float d) { fMinDistSq = d*d; }
    float GetMinDistance() const;

    hsMatrix44* GetMatrix44(hsMatrix44* xOut) const { *xOut = fXform; return xOut; }
    hsPoint3*   GetPosition(hsPoint3* pOut) const { *pOut = fPos; return pOut; }
    hsVector3*  GetVelocity(hsVector3* vOut) const { *vOut = fVel; return vOut; }
    hsVector3*  GetDirection(hsVector3* dOut) const { dOut->Set(fXform.fMap[0][2], fXform.fMap[1][2], fXform.fMap[2][2]); return dOut; }
    hsVector3*  GetUp(hsVector3* uOut) const { uOut->Set(fXform.fMap[0][1], fXform.fMap[1][1], fXform.fMap[2][1]); return uOut; }
    hsVector3*  GetAcceleration(hsVector3* aOut) const { *aOut = fAccel; return aOut; }
    
    bool OutOfRange(hsPoint3 &pt, float range) const;
    const hsAffineParts* Parts() const { return &fParts; }
    void InitParts(const hsAffineParts& p) { fParts = p; }

    float GetExtremePoint(hsPoint3 &worldPt) const; // Exhaustive search
    float GetExtremePoint(float lastTime, float delTime, hsPoint3 &worldPt) const; // Incremental search

    // for arclen usage
    void ComputeArcLenDeltas(int32_t numSamples=256);
    float GetLookAheadTime(float startTime, float arcLength, bool bwd, int32_t* startSrchIdx);

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

#endif //plAnimPath_inc