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df5240ea | 1 | #ifndef ALIITSGEOMMATRIX_H |
2 | #define ALIITSGEOMMATRIX_H | |
3 | /* Copyright(c) 2000, ALICE Experiment at CERN, All rights reserved. * | |
4 | * see cxx source for full Copyright notice. */ | |
5 | /* $Id: */ | |
6 | //////////////////////////////////////////////////////////////////////// | |
7 | // ITS geometry manipulation routines on the module level. This class is | |
8 | // to replace the structure ITS_geom in the class AliITSgeom. | |
9 | // Created May 30 2000. | |
10 | // version 0.0.0 | |
11 | // By Bjorn S. Nilsen | |
12 | //////////////////////////////////////////////////////////////////////// | |
13 | ||
85f1e34a | 14 | #include <TObject.h> |
15 | ||
8253cd9a | 16 | class AliITSgeomMatrix : public TObject { |
df5240ea | 17 | public: |
18 | AliITSgeomMatrix(); // Default constructor | |
85f1e34a | 19 | // Standard constructor #1 |
6ba216a4 | 20 | AliITSgeomMatrix(Int_t idt,const Int_t id[3], |
df5240ea | 21 | const Double_t rot[3],const Double_t tran[3]); |
85f1e34a | 22 | // Standard constructor #2 |
6ba216a4 | 23 | AliITSgeomMatrix(Int_t idt,const Int_t id[3], |
d962cab4 | 24 | Double_t matrix[3][3],const Double_t tran[3]); |
85f1e34a | 25 | // Standard constructor #3 |
26 | AliITSgeomMatrix(const Double_t rotd[6]/*degrees GEANT angles*/, | |
6ba216a4 | 27 | Int_t idt,const Int_t id[3], |
df5240ea | 28 | const Double_t tran[3]); |
85f1e34a | 29 | // Copy operator |
df5240ea | 30 | AliITSgeomMatrix(const AliITSgeomMatrix &source); |
85f1e34a | 31 | // Alignment operator |
df5240ea | 32 | void operator=(const AliITSgeomMatrix &sourse); // copy |
85f1e34a | 33 | virtual ~AliITSgeomMatrix(){}; // default constructor. |
34 | // Prints a line describing the output format of the function Print. | |
024a4246 | 35 | void PrintComment(ostream *os) const; |
85f1e34a | 36 | // Prints out the content of this class in ASCII format. |
8253cd9a | 37 | void Print(ostream *os); |
85f1e34a | 38 | // Prints out the content of this class in ASCII format but includes |
39 | // formating and strings that make it more humanly readable. | |
024a4246 | 40 | void PrintTitles(ostream *os) const; |
85f1e34a | 41 | // Reads in the content of this class in the format of Print |
8253cd9a | 42 | void Read(istream *is); |
d2f55a22 | 43 | virtual void Print(Option_t *option="") const {TObject::Print(option);} |
44 | virtual Int_t Read(const char *name) {return TObject::Read(name);} | |
df5240ea | 45 | |
85f1e34a | 46 | // Given the rotation angles [radians] it fills frot and computes |
47 | // the rotation matrix fm. | |
df5240ea | 48 | void SetAngles(const Double_t rot[3]){// [radians] |
49 | for(Int_t i=0;i<3;i++)frot[i] = rot[i];this->MatrixFromAngle();} | |
85f1e34a | 50 | // Sets the translation vector and computes fCylR and fCylPhi. |
024a4246 | 51 | void SetTranslation(const Double_t tran[3]); |
85f1e34a | 52 | // sets the rotation matrix and computes the rotation angles [radians] |
d962cab4 | 53 | void SetMatrix(Double_t matrix[3][3]){ for(Int_t i=0;i<3;i++) |
df5240ea | 54 | for(Int_t j=0;j<3;j++) fm[i][j]=matrix[i][j];this->AngleFromMatrix();} |
85f1e34a | 55 | // Sets the detector index value |
6ba216a4 | 56 | void SetDetectorIndex(Int_t idt) {fDetectorIndex = idt;} |
85f1e34a | 57 | // Sets the detector layer, ladder, detector (id) values. |
df5240ea | 58 | void SetIndex(const Int_t id[3]){ |
59 | for(Int_t i=0;i<3;i++) fid[i] = id[i];} | |
85f1e34a | 60 | // Returns the rotation angles [radians] |
024a4246 | 61 | void GetAngles(Double_t rot[3]) const {// [radians] |
df5240ea | 62 | for(Int_t i=0;i<3;i++) rot[i] = frot[i];} |
85f1e34a | 63 | // Returns the translation vector [cm] |
024a4246 | 64 | void GetTranslation(Double_t tran[3]) const { |
df5240ea | 65 | for(Int_t i=0;i<3;i++) tran[i] = ftran[i];} |
85f1e34a | 66 | // Returns the translation vector in cylindrical |
67 | // coordinates [cm,radians] | |
024a4246 | 68 | void GetTranslationCylinderical (Double_t tran[3]) const { |
d8cc8493 | 69 | tran[0] = fCylR; |
70 | tran[1] = fCylPhi; | |
71 | tran[2] = ftran[2];} | |
85f1e34a | 72 | // Returns the values of the rotation matrix |
024a4246 | 73 | void GetMatrix(Double_t matrix[3][3]) const {for(Int_t i=0;i<3;i++) |
df5240ea | 74 | for(Int_t j=0;j<3;j++) matrix[i][j] = fm[i][j];} |
85f1e34a | 75 | // Returns the detector index value. |
76 | Int_t GetDetectorIndex() const {return fDetectorIndex;} | |
77 | // returns the modules index layer, ladder, detector | |
024a4246 | 78 | void GetIndex(Int_t id[3]) const {for(Int_t i=0;i<3;i++) id[i] = fid[i];} |
85f1e34a | 79 | // Sets the rotation matrix based on the 6 GEANT rotation |
80 | // angles [radian] | |
df5240ea | 81 | void MatrixFromSixAngles(const Double_t *ang); |
85f1e34a | 82 | // Returns the 6 GEANT rotation angles [radians] from the |
83 | // existing rotation matrix. | |
df5240ea | 84 | void SixAnglesFromMatrix(Double_t *ang); |
85 | ||
85f1e34a | 86 | // Given a position in Cartesian ALICE global coordinates [cm] |
87 | // returns the position in Cartesian detector/module local | |
88 | //coordinates [cm] | |
024a4246 | 89 | void GtoLPosition(const Double_t g[3],Double_t l[3]) const; |
85f1e34a | 90 | // Given a position in Cartesian detector/module local coordinates [cm] |
91 | // returns the position in Cartesian ALICE global | |
92 | //coordinates [cm] | |
024a4246 | 93 | void LtoGPosition(const Double_t l[3],Double_t g[3]) const; |
85f1e34a | 94 | // Given a momentum in Cartesian ALICE global coordinates |
95 | // returns the momentum in Cartesian detector/module local | |
96 | //coordinates | |
024a4246 | 97 | void GtoLMomentum(const Double_t g[3],Double_t l[3]) const; |
85f1e34a | 98 | // Given a momentum in Cartesian detector/module local coordinates |
99 | // returns the momentum in Cartesian ALICE global coordinates | |
024a4246 | 100 | void LtoGMomentum(const Double_t l[3],Double_t g[3]) const; |
85f1e34a | 101 | // given a position error matrix in ALICE Cartesian global |
102 | // coordinates [cm] returns a position error matrix in detector/ | |
103 | // module local Cartesian local coordinates [cm] | |
024a4246 | 104 | void GtoLPositionError(Double_t g[3][3],Double_t l[3][3]) const; |
85f1e34a | 105 | // given a position error matrix in detector/module Cartesian local |
106 | // coordinates [cm] returns a position error matrix in ALICE | |
107 | // Cartesian global coordinates [cm] | |
024a4246 | 108 | void LtoGPositionError(Double_t l[3][3],Double_t g[3][3]) const; |
df5240ea | 109 | // Tracking Related Routines |
024a4246 | 110 | void GtoLPositionTracking(const Double_t g[3],Double_t l[3]) const; |
85f1e34a | 111 | // Given a position in Cartesian Tracking global coordinates [cm] |
112 | // returns the position in Cartesian detector/module local | |
113 | // coordinates [cm] | |
024a4246 | 114 | void LtoGPositionTracking(const Double_t l[3],Double_t g[3]) const; |
85f1e34a | 115 | // Given a position in Cartesian detector/module local coordinates [cm] |
116 | // returns the position in Cartesian Tracking global | |
117 | //coordinates [cm] | |
024a4246 | 118 | void GtoLMomentumTracking(const Double_t g[3],Double_t l[3]) const; |
85f1e34a | 119 | // Given a momentum in Cartesian detector/module local coordinates |
120 | // returns the momentum in Cartesian Tracking global coordinates | |
024a4246 | 121 | void LtoGMomentumTracking(const Double_t l[3],Double_t g[3]) const; |
85f1e34a | 122 | // given a position error matrix in Tracking Cartesian global |
123 | // coordinates [cm] returns a position error matrix in detector/ | |
124 | // module local Cartesian local coordinates [cm] | |
8d5bd3f9 | 125 | void GtoLPositionErrorTracking(Double_t g[3][3], |
024a4246 | 126 | Double_t l[3][3]) const; |
85f1e34a | 127 | // given a position error matrix in detector/module Cartesian local |
128 | // coordinates [cm] returns a position error matrix in Tracking | |
129 | // Cartesian global coordinates [cm] | |
8d5bd3f9 | 130 | void LtoGPositionErrorTracking(Double_t l[3][3], |
024a4246 | 131 | Double_t g[3][3]) const; |
85f1e34a | 132 | // Computes the distance squared [cm^2] between a point t[3] and |
133 | // this module/detector | |
024a4246 | 134 | Double_t Distance2(const Double_t t[3]) const {Double_t d=0.0,q; |
df5240ea | 135 | for(Int_t i=0;i<3;i++){q = t[i]-ftran[i]; d += q*q;} |
136 | return d;} | |
137 | private: // private functions | |
85f1e34a | 138 | // Given the rotation matrix fm it fills the rotation angles frot |
df5240ea | 139 | void MatrixFromAngle(); |
85f1e34a | 140 | // Given the rotation angles frot it fills the rotation matrix fm |
df5240ea | 141 | void AngleFromMatrix(); |
142 | private: // Data members. | |
143 | Int_t fDetectorIndex; // Detector type index (like fShapeIndex was) | |
144 | Int_t fid[3]; // layer, ladder, detector numbers. | |
8253cd9a | 145 | Double_t frot[3]; //! vector of rotations about x,y,z [radians]. |
df5240ea | 146 | Double_t ftran[3]; // Translation vector of module x,y,z. |
85f1e34a | 147 | Double_t fCylR,fCylPhi; //! Translation vector in Cylindrical coord. |
df5240ea | 148 | Double_t fm[3][3]; // Rotation matrix based on frot. |
149 | ||
d8cc8493 | 150 | // Note, fCylR and fCylPhi are added as data members because it costs |
151 | // about a factor of 10 to compute them over looking them up. Since | |
152 | // they are used in some tracking algorithms this can be a large cost | |
153 | // in computing time. They are not written out but computed. | |
154 | ||
df5240ea | 155 | ClassDef(AliITSgeomMatrix,1) // Matrix class used by AliITSgeom. |
156 | }; | |
157 | // Input and output function for standard C++ input/output. | |
158 | ostream &operator<<(ostream &os,AliITSgeomMatrix &source); | |
159 | istream &operator>>(istream &os,AliITSgeomMatrix &source); | |
160 | ||
161 | #endif |