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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. */ | |
6b0f3880 | 5 | |
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 | //////////////////////////////////////////////////////////////////////////// | |
85f1e34a | 13 | #include <TObject.h> |
023ae34b | 14 | #include <TString.h> |
15 | class TPolyLine3D; | |
16 | class TNode; | |
17 | class TShape; | |
85f1e34a | 18 | |
8253cd9a | 19 | class AliITSgeomMatrix : public TObject { |
df5240ea | 20 | public: |
012f0f4c | 21 | AliITSgeomMatrix(); // Default constructor |
22 | // Standard constructor #1 | |
23 | AliITSgeomMatrix(Int_t idt,const Int_t id[3], | |
24 | const Double_t rot[3],const Double_t tran[3]); | |
25 | // Standard constructor #2 | |
26 | AliITSgeomMatrix(Int_t idt,const Int_t id[3], | |
27 | Double_t matrix[3][3],const Double_t tran[3]); | |
28 | // Standard constructor #3 | |
29 | AliITSgeomMatrix(const Double_t rotd[6]/*degrees GEANT angles*/, | |
30 | Int_t idt,const Int_t id[3], | |
31 | const Double_t tran[3]); | |
32 | // Copy constructor | |
33 | AliITSgeomMatrix(const AliITSgeomMatrix &source); | |
34 | // Assignment operator | |
35 | AliITSgeomMatrix& operator=(const AliITSgeomMatrix &source); | |
36 | virtual ~AliITSgeomMatrix(){}; // default constructor. | |
37 | // Prints a line describing the output format of the function Print. | |
38 | void PrintComment(ostream *os) const; | |
39 | // Prints out the content of this class in ASCII format. | |
40 | void Print(ostream *os)const; | |
41 | // Prints out the content of this class in ASCII format but includes | |
42 | // formating and strings that make it more humanly readable. | |
43 | void PrintTitles(ostream *os) const; | |
44 | // Reads in the content of this class in the format of Print | |
45 | void Read(istream *is); | |
46 | virtual void Print(Option_t *option="") const { | |
47 | TObject::Print(option);} | |
48 | virtual Int_t Read(const char *name) {return TObject::Read(name);} | |
49 | ||
50 | // Returns the geometry path corresponding to this transformation | |
51 | TString& GetPath(){return fPath;} | |
52 | // Sets the geometry path | |
53 | void SetPath(const Char_t *p){fPath = p;} | |
54 | void SetPath(const TString &p){fPath = p;} | |
55 | // Given the rotation angles [radians] it fills frot and computes | |
56 | // the rotation matrix fm. | |
57 | void SetAngles(const Double_t rot[3]){// [radians] | |
58 | for(Int_t i=0;i<3;i++)frot[i] = rot[i];this->MatrixFromAngle();} | |
59 | // Sets the translation vector and computes fCylR and fCylPhi. | |
60 | void SetTranslation(const Double_t tran[3]); | |
61 | // sets the rotation matrix and computes the rotation angles [radians] | |
62 | void SetMatrix(const Double_t matrix[3][3]){ for(Int_t i=0;i<3;i++) | |
63 | for(Int_t j=0;j<3;j++) fm[i][j]=matrix[i][j];this->AngleFromMatrix();} | |
64 | // Sets the detector index value | |
65 | void SetDetectorIndex(Int_t idt) {fDetectorIndex = idt;} | |
66 | // Sets the detector layer, ladder, detector (id) values. | |
67 | void SetIndex(const Int_t id[3]){ | |
68 | for(Int_t i=0;i<3;i++) fid[i] = id[i];} | |
69 | // Returns the rotation angles [radians] | |
70 | void GetAngles(Double_t rot[3]) const {// [radians] | |
71 | for(Int_t i=0;i<3;i++) rot[i] = frot[i];} | |
72 | // Returns the translation vector [cm] | |
73 | void GetTranslation(Double_t tran[3]) const { | |
74 | for(Int_t i=0;i<3;i++) tran[i] = ftran[i];} | |
75 | // Returns the translation vector in cylindrical | |
76 | // coordinates [cm,radians] | |
77 | void GetTranslationCylinderical (Double_t tran[3]) const { | |
78 | tran[0] = fCylR; | |
79 | tran[1] = fCylPhi; | |
80 | tran[2] = ftran[2];} | |
81 | // Returns the values of the rotation matrix | |
82 | void GetMatrix(Double_t matrix[3][3]) const {for(Int_t i=0;i<3;i++) | |
83 | for(Int_t j=0;j<3;j++) matrix[i][j] = fm[i][j];} | |
84 | // Returns the detector index value. | |
85 | Int_t GetDetectorIndex() const {return fDetectorIndex;} | |
86 | // returns the modules index layer, ladder, detector | |
87 | void GetIndex(Int_t id[3]) const {for(Int_t i=0;i<3;i++) id[i] = fid[i];} | |
88 | // return the x,y,z components (global) of the normalized normal | |
89 | // vector which helps to define the plane the detector is a part of | |
90 | void GetGlobalNormal(Double_t &nx,Double_t &ny,Double_t &nz)const{ | |
91 | Double_t ln[3]={0.0,1.0,0.0},gn[3];LtoGMomentum(ln,gn); | |
92 | nx = gn[0];ny=gn[1];nz=gn[2];return;} | |
93 | // Sets the rotation matrix based on the 6 GEANT rotation | |
94 | // angles [radian] | |
95 | void MatrixFromSixAngles(const Double_t *ang); | |
96 | // Returns the 6 GEANT rotation angles [radians] from the | |
97 | // existing rotation matrix. | |
98 | void SixAnglesFromMatrix(Double_t *ang)const; | |
99 | // Set rotation using the Euler's Chi-convention | |
100 | void SetEulerAnglesChi(const Double_t ang[3]); | |
df5240ea | 101 | |
012f0f4c | 102 | // Given a position in Cartesian ALICE global coordinates [cm] |
103 | // returns the position in Cartesian detector/module local | |
104 | //coordinates [cm] | |
105 | void GtoLPosition(const Double_t g[3],Double_t l[3]) const; | |
106 | // Given a position in Cartesian detector/module local coordinates [cm] | |
107 | // returns the position in Cartesian ALICE global | |
108 | //coordinates [cm] | |
109 | void LtoGPosition(const Double_t l[3],Double_t g[3]) const; | |
110 | // Given a momentum in Cartesian ALICE global coordinates | |
111 | // returns the momentum in Cartesian detector/module local | |
112 | //coordinates | |
113 | void GtoLMomentum(const Double_t g[3],Double_t l[3]) const; | |
114 | // Given a momentum in Cartesian detector/module local coordinates | |
115 | // returns the momentum in Cartesian ALICE global coordinates | |
116 | void LtoGMomentum(const Double_t l[3],Double_t g[3]) const; | |
117 | // given a position error matrix in ALICE Cartesian global | |
118 | // coordinates [cm] returns a position error matrix in detector/ | |
119 | // module local Cartesian local coordinates [cm] | |
120 | void GtoLPositionError(const Double_t g[3][3],Double_t l[3][3]) const; | |
121 | // given a position error matrix in detector/module Cartesian local | |
122 | // coordinates [cm] returns a position error matrix in ALICE | |
123 | // Cartesian global coordinates [cm] | |
124 | void LtoGPositionError(const Double_t l[3][3],Double_t g[3][3]) const; | |
125 | // Tracking Related Routines | |
126 | void GtoLPositionTracking(const Double_t g[3],Double_t l[3]) const; | |
127 | // Given a position in Cartesian Tracking global coordinates [cm] | |
128 | // returns the position in Cartesian detector/module local | |
129 | // coordinates [cm] | |
130 | void LtoGPositionTracking(const Double_t l[3],Double_t g[3]) const; | |
131 | // Given a position in Cartesian detector/module local coordinates [cm] | |
132 | // returns the position in Cartesian Tracking global | |
133 | //coordinates [cm] | |
134 | void GtoLMomentumTracking(const Double_t g[3],Double_t l[3]) const; | |
135 | // Given a momentum in Cartesian detector/module local coordinates | |
136 | // returns the momentum in Cartesian Tracking global coordinates | |
137 | void LtoGMomentumTracking(const Double_t l[3],Double_t g[3]) const; | |
138 | // given a position error matrix in Tracking Cartesian global | |
139 | // coordinates [cm] returns a position error matrix in detector/ | |
140 | // module local Cartesian local coordinates [cm] | |
141 | void GtoLPositionErrorTracking(const Double_t g[3][3], | |
142 | Double_t l[3][3]) const; | |
143 | // given a position error matrix in detector/module Cartesian local | |
144 | // coordinates [cm] returns a position error matrix in Tracking | |
145 | // Cartesian global coordinates [cm] | |
146 | void LtoGPositionErrorTracking(const Double_t l[3][3], | |
147 | Double_t g[3][3]) const; | |
148 | // Computes the distance squared [cm^2] between a point t[3] and | |
149 | // this module/detector | |
150 | Double_t Distance2(const Double_t t[3]) const {Double_t d=0.0,q; | |
151 | for(Int_t i=0;i<3;i++){q = t[i]-ftran[i]; d += q*q;} | |
152 | return d;} | |
023ae34b | 153 | // |
154 | // Documentation related Class | |
6b0f3880 | 155 | TPolyLine3D* CreateLocalAxis() const; |
156 | TPolyLine3D* CreateLocalAxisTracking() const; | |
023ae34b | 157 | TNode* CreateNode(const Char_t *nodeName,const Char_t *nodeTitle, |
6b0f3880 | 158 | TNode *mother,TShape *shape,Bool_t axis=kTRUE) const; |
159 | void MakeFigures() const; | |
023ae34b | 160 | // |
df5240ea | 161 | private: // private functions |
012f0f4c | 162 | // Given the rotation matrix fm it fills the rotation angles frot |
163 | void MatrixFromAngle(); | |
164 | // Given the rotation angles frot it fills the rotation matrix fm | |
165 | void AngleFromMatrix(); | |
df5240ea | 166 | private: // Data members. |
012f0f4c | 167 | Int_t fDetectorIndex; // Detector type index (like fShapeIndex was) |
168 | Int_t fid[3]; // layer, ladder, detector numbers. | |
169 | Double_t frot[3]; //! vector of rotations about x,y,z [radians]. | |
170 | Double_t ftran[3]; // Translation vector of module x,y,z. | |
171 | Double_t fCylR,fCylPhi; //! Translation vector in Cylindrical coord. | |
172 | Double_t fm[3][3]; // Rotation matrix based on frot. | |
173 | TString fPath; // Path within Geometry to this volume | |
174 | ||
175 | // Note, fCylR and fCylPhi are added as data members because it costs | |
176 | // about a factor of 10 to compute them over looking them up. Since | |
177 | // they are used in some tracking algorithms this can be a large cost | |
178 | // in computing time. They are not written out but computed. | |
179 | ||
180 | ClassDef(AliITSgeomMatrix,2) // Matrix class used by AliITSgeom. | |
df5240ea | 181 | }; |
182 | // Input and output function for standard C++ input/output. | |
183 | ostream &operator<<(ostream &os,AliITSgeomMatrix &source); | |
184 | istream &operator>>(istream &os,AliITSgeomMatrix &source); | |
185 | ||
186 | #endif |