STEER/AliStrLine.h

   1 #ifndef ALISTRLINE_H
   2 #define ALISTRLINE_H
   3 /* Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. *
   4  * See cxx source for full Copyright notice                               */
   5
   6 ///////////////////////////////////////////////////////////////////
   7 //                                                               //
   8 // A straight line is coded as a point (3 Double_t) and           //
   9 // 3 direction cosines                                           //
  10 //                                                               //
  11 ///////////////////////////////////////////////////////////////////
  12
  13
  14 class AliStrLine : public TObject {
  15
  16  public:
  17     AliStrLine();        // default constructor
  18     AliStrLine(Double_t *point, Double_t *cd, Bool_t twopoints=kFALSE);  // standard constructor
  19     AliStrLine(Float_t *pointf, Float_t *cdf, Bool_t twopoints=kFALSE);
  20     virtual ~AliStrLine(); // destructor
  21     void PrintStatus() const;
  22     void SetP0(Double_t *point) {for(Int_t i=0;i<3;i++)fP0[i]=point[i];}
  23     void SetCd(Double_t *cd) {for(Int_t i=0;i<3;i++)fCd[i]=cd[i];}
  24     void SetDebug(Int_t dbfl = 0){fDebug = dbfl; }
  25     void GetP0(Double_t *point) const {for(Int_t i=0;i<3;i++)point[i]=fP0[i];}
  26     void GetCd(Double_t *cd) const {for(Int_t i=0;i<3;i++)cd[i]=fCd[i];}
  27     void GetCurrentPoint(Double_t *point) const;
  28     Int_t IsParallelTo(AliStrLine *line) const;
  29     Int_t Crossrphi(AliStrLine *line);
  30     Int_t CrossPoints(AliStrLine *line, Double_t *point1, Double_t *point2);
  31     Int_t Cross(AliStrLine *line, Double_t *point);
  32     Double_t GetDCA(AliStrLine *line) const;
  33     Double_t GetDistFromPoint(Double_t *point) const;
  34  protected:
  35     void InitDirection(Double_t *point, Double_t *cd);
  36     void InitTwoPoints(Double_t *pA, Double_t *pB);
  37     Double_t fP0[3];           // given point
  38     Double_t fCd[3];           // direction cosines
  39     Double_t fTpar;            //! parameter
  40     Int_t   fDebug;           //! debug flag - verbose printing if >0
  41  private:
  42     void SetPar(Double_t par){fTpar = par;}
  43
  44   ClassDef(AliStrLine,1);
  45 };
  46
  47 #endif