102 lines
2.7 KiB
C++
102 lines
2.7 KiB
C++
#ifndef ClassAnasen_h
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#define ClassAnasen_h
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#include <cstdio>
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#include <TMath.h>
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#include <TVector3.h>
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class Anasen{
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public:
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Anasen();
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~Anasen() {}
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void CalTrack(TVector3 sx3Pos, int anodeID, int cathodeID);
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TVector3 GetTrackPos() const {return trackPos;}
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TVector3 GetTrackVec() const {return trackVec;}
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double GetTrackTheta() const {return trackVec.Theta();}
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double GetTrackPhi() const {return trackVec.Phi();}
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// void DrawTrack();
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private:
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const int nWire = 24;
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const int wireShift = 3; // how twisted is the wire.
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const double AnodeRadius = 38 ; // mm
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const double CathodeRadius = 38 ; // mm
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const double PCLength = 100; //mm
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std::vector<TVector3> P1; // the anode wire position vector in space
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std::vector<TVector3> P2; // the anode wire position vector in space
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std::vector<TVector3> Q1; // the cathode wire position vector in space
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std::vector<TVector3> Q2; // the cathode wire position vector in space
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void CalWireDirection();
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TVector3 trackPos;
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TVector3 trackVec;
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double trackPosErrorZ; // mm
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TVector3 tracePosErrorXY; // the mag is the size of the error
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TVector3 trackVecErrorA; // error vector prependicular to the Anode-Pos plan
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TVector3 trackVecErrorC; // error vector prependicular to the Cathode-Pos plan
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};
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inline Anasen::Anasen(){
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CalWireDirection();
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}
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inline void Anasen::CalWireDirection(){
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TVector3 p1; // anode
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TVector3 p2;
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TVector3 q1; // cathode
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TVector3 q2;
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for(int i = 0; i < nWire; i++ ){
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// Anode rotate right-hand
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p1.SetXYZ( AnodeRadius * TMath::Cos( TMath::TwoPi() * i / nWire ),
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AnodeRadius * TMath::Sin( TMath::TwoPi() * i / nWire ),
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-PCLength/2);
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p2.SetXYZ( AnodeRadius * TMath::Cos( TMath::TwoPi() * (i + wireShift) / nWire ),
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AnodeRadius * TMath::Sin( TMath::TwoPi() * (i + wireShift) / nWire ),
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PCLength/2);
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P1.push_back(p1);
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P2.push_back(p2);
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// Cathod rotate left-hand
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p1.SetXYZ( CathodeRadius * TMath::Cos( TMath::TwoPi() * i / nWire ),
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CathodeRadius * TMath::Sin( TMath::TwoPi() * i / nWire ),
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-PCLength/2);
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p2.SetXYZ( CathodeRadius * TMath::Cos( TMath::TwoPi() * (i - wireShift) / nWire ),
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CathodeRadius * TMath::Sin( TMath::TwoPi() * (i - wireShift) / nWire ),
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PCLength/2);
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Q1.push_back(p1);
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Q2.push_back(p2);
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}
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}
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inline void Anasen::CalTrack(TVector3 sx3Pos, int anodeID, int cathodeID){
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trackPos = sx3Pos;
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TVector3 n1 = (P2[anodeID] - P1[anodeID]).Cross((sx3Pos - P1[anodeID]));
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TVector3 n2 = (Q2[anodeID] - Q1[anodeID]).Cross((sx3Pos - Q1[anodeID]));
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// if the handiness of anode and cathode revered, it should be n2 cross n1
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trackVec = (n1.Cross(n2)).Unit();
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}
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#endif |