1 #ifndef ALIFMDDETECTOR_H
2 #define ALIFMDDETECTOR_H
3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights
6 * Latest changes by Christian Holm Christensen <cholm@nbi.dk>
8 * See cxx source for full Copyright notice
10 //__________________________________________________________________
12 // Utility class to help implement the FMD geometry. This provides
13 // the interface for the concrete geometry implementations of the FMD
15 /** @file AliFMDDetector.h
16 @author Christian Holm Christensen <cholm@nbi.dk>
17 @date Mon Mar 27 12:36:27 2006
18 @brief Sub-detector base class declaration
27 /** @defgroup FMD_base Basic classes */
28 //__________________________________________________________________
29 /** @brief Base class for the geometry description and parameters of
30 the FMD sub detectors FMD1, FMD2, and FMD3.
32 This class hold common parameters of the specific FMD detectors.
35 class AliFMDDetector : public TNamed
39 @param id Detector number
40 @param inner Pointer to inner ring geometry
41 @param outer Pointer to inner outer geometry
43 AliFMDDetector(Int_t id, AliFMDRing* inner, AliFMDRing* outer);
45 @param other Object to copy from. */
46 AliFMDDetector(const AliFMDDetector& other);
47 /** Assignment operator
48 @param other Object to assign from
49 @return reference to this object */
50 AliFMDDetector& operator=(const AliFMDDetector& other);
51 virtual ~AliFMDDetector() {}
52 /** Initialize the geometry */
54 /** Find the transformations that correspond to modules of this
55 detector, and store them in the arrays. */
56 virtual void InitTransformations();
58 /** @param x Detector number */
59 void SetId(Int_t x) { fId = x; }
60 /** @param x Position of outer ring along z */
61 void SetInnerZ(Double_t x) { fInnerZ = x; }
62 /** @param x Position of outer ring along z */
63 void SetOuterZ(Double_t x) { fOuterZ = x; }
64 /** @param x Thickness of honeycomb plate */
65 void SetHoneycombThickness(Double_t x=1) { fHoneycombThickness = x; }
66 /** @param x Thickness of aluminium of honeycomb */
67 void SetAlThickness(Double_t x=.1) { fAlThickness = x; }
68 /** @param x Inner radius of inner honeycomb */
69 void SetInnerHoneyLowR(Double_t x) { fInnerHoneyLowR = x; }
70 /** @param x Outer radius of inner honeycomb */
71 void SetInnerHoneyHighR(Double_t x) { fInnerHoneyHighR = x; }
72 /** @param x Inner radius of outer honeycomb */
73 void SetOuterHoneyLowR(Double_t x) { fOuterHoneyLowR = x; }
74 /** @param x Outer radius of outer honeycomb */
75 void SetOuterHoneyHighR(Double_t x) { fOuterHoneyHighR = x; }
77 /** @return Detector number */
78 Int_t GetId() const { return fId; }
79 /** @return Position of outer ring along z */
80 Double_t GetInnerZ() const { return fInnerZ; }
81 /** @return Position of outer ring along z */
82 Double_t GetOuterZ() const { return fOuterZ; }
83 /** @return Thickness of honeycomb plate */
84 Double_t GetHoneycombThickness() const { return fHoneycombThickness; }
85 /** @return Thickness of aluminium of honeycomb */
86 Double_t GetAlThickness() const { return fAlThickness; }
87 /** @return Inner radius of inner honeycomb */
88 Double_t GetInnerHoneyLowR() const { return fInnerHoneyLowR; }
89 /** @return Outer radius of inner honeycomb */
90 Double_t GetInnerHoneyHighR() const { return fInnerHoneyHighR; }
91 /** @return Inner radius of outer honeycomb */
92 Double_t GetOuterHoneyLowR() const { return fOuterHoneyLowR; }
93 /** @return Outer radius of outer honeycomb */
94 Double_t GetOuterHoneyHighR() const { return fOuterHoneyHighR; }
96 /** @return Inner ring information */
97 AliFMDRing* GetInner() const { return fInner; }
98 /** @return Outer ring information */
99 AliFMDRing* GetOuter() const { return fOuter; }
100 /** @param id Id of ring to get
101 @return Pointer to ring, 0 on failure */
102 AliFMDRing* GetRing(Char_t id) const;
103 /** @param id Id of ring to get
104 @return Z position of ring or 0 on failure */
105 Double_t GetRingZ(Char_t id) const;
107 /** Translate detector coordinates (detector, ring, sector, strip)
108 to spatial coordinates (x, y, z) in the master reference frame
109 of ALICE. The member function uses the transformations
110 previously obtained from the TGeoManager.
112 @param sector Sector number
113 @param strip Strip number
114 @param x On return, X coordinate
115 @param y On return, Y coordinate
116 @param z On return, Z coordinate */
117 void Detector2XYZ(Char_t ring, UShort_t sector, UShort_t strip,
118 Double_t& x, Double_t& y, Double_t& z) const;
119 /** Translate spatial coordinates (x,y,z) in the master reference
120 frame of ALICE to the detector coordinates (detector, ring,
121 sector, strip). Note, that if this method is to be used in
122 reconstruction or the like, then the input z-coordinate should
123 be corrected for the events interactions points z-coordinate,
126 geom->XYZ2Detector(x,y,z-ipz,d,r,s,t);
128 @param x X coordinate
129 @param y Y coordinate
130 @param z Z coordinate
131 @param ring On return, Ring id
132 @param sector On return, Sector number
133 @param strip On return, Strip number
134 @return @c false of (@a x, @a y, @a z) is not within this
136 Bool_t XYZ2Detector(Double_t x, Double_t y, Double_t z,
137 Char_t& ring, UShort_t& sector, UShort_t& strip) const;
139 /** Declare alignable volumes */
140 virtual void SetAlignableVolumes() const;
142 /** Check if we have all transformations for a ring
143 @param ring Ring to check for
144 @return @c true if we got all transforms */
145 Bool_t HasAllTransforms(Char_t ring) const;
146 /** Get transformation matrix for a sector in a ring
148 @param sector Sector numberr
149 @return Matrix on success, 0 otherwise */
150 TGeoMatrix* FindTransform(Char_t ring, UShort_t sector) const;
151 Int_t fId; // Detector number
152 Double_t fInnerZ; // Position of outer ring along z
153 Double_t fOuterZ; // Position of outer ring along z
154 Double_t fHoneycombThickness; // Thickness of honeycomb plate
155 Double_t fAlThickness; // Thickness of aluminium of honeycomb
156 Double_t fInnerHoneyLowR; // Inner radius of inner honeycomb
157 Double_t fInnerHoneyHighR; // Outer radius of inner honeycomb
158 Double_t fOuterHoneyLowR; // Inner radius of outer honeycomb
159 Double_t fOuterHoneyHighR; // Outer radius of outer honeycomb
160 AliFMDRing* fInner; // Pointer to inner ring information
161 AliFMDRing* fOuter; // Pointer to outer ring information
162 TObjArray* fInnerTransforms; // List of inner module global
163 TObjArray* fOuterTransforms; // List of outer module global
165 ClassDef(AliFMDDetector, 1); //
169 //____________________________________________________________________