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SegmentationAlpide.h
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1 
6 #ifndef MVTX_ALPIDE_SEGMENTATION_H
7 #define MVTX_ALPIDE_SEGMENTATION_H
8 
9 #include <TVector3.h>
10 #include <iostream>
11 
12 class SegmentationAlpide
13 {
14  public:
15  static constexpr int NCols = 1024;
16  static constexpr int NRows = 512;
17  static constexpr int NPixels = NRows * NCols;
18  static constexpr float PitchCol = 29.24e-4;
19  static constexpr float PitchRow = 26.88e-4;
20  static constexpr float PassiveEdgeReadOut = 0.12f; // width of the readout edge (Passive bottom)
21  static constexpr float PassiveEdgeTop = 37.44e-4; // Passive area on top
22  static constexpr float PassiveEdgeSide = 29.12e-4; // width of Passive area on left/right of the sensor
23  static constexpr float ActiveMatrixSizeCols = PitchCol * NCols; // Active size along columns
24  static constexpr float ActiveMatrixSizeRows = PitchRow * NRows; // Active size along rows
25 
26  // effective thickness of sensitive layer, accounting for charge collection non-unifoemity, https://alice.its.cern.ch/jira/browse/AOC-46
27  static constexpr float SensorLayerThicknessEff = 22.e-4;
28  static constexpr float SensorLayerThickness = 30.e-4; // effective thickness of sensitive part
29  static constexpr float SensorSizeCols = ActiveMatrixSizeCols + PassiveEdgeSide + PassiveEdgeSide; // SensorSize along columns
30  static constexpr float SensorSizeRows = ActiveMatrixSizeRows + PassiveEdgeTop + PassiveEdgeReadOut; // SensorSize along rows
31 
32  SegmentationAlpide() = default;
33  ~SegmentationAlpide() = default;
34 
46  static bool localToDetector(float x, float z, int& iRow, int& iCol);
48  static void localToDetectorUnchecked(float xRow, float zCol, int& iRow, int& iCol);
49 
60  static bool detectorToLocal(int iRow, int iCol, float& xRow, float& zCol);
61  static bool detectorToLocal(float row, float col, float& xRow, float& zCol);
62  static bool detectorToLocal(float row, float col, TVector3& loc);
63 
64  // same but w/o check for row/col range
65  static void detectorToLocalUnchecked(int iRow, int iCol, float& xRow, float& zCol);
66  static void detectorToLocalUnchecked(float row, float col, float& xRow, float& zCol);
67  static void detectorToLocalUnchecked(float row, float col, TVector3& loc);
68 
69  static constexpr float getFirstRowCoordinate()
70  {
71  return 0.5 * ((ActiveMatrixSizeRows - PassiveEdgeTop + PassiveEdgeReadOut) - PitchRow);
72  }
73  static constexpr float getFirstColCoordinate() { return 0.5 * (PitchCol - ActiveMatrixSizeCols); }
74 
75  static void print();
76 };
77 
78 //_________________________________________________________________________________________________
79 inline void SegmentationAlpide::localToDetectorUnchecked(float xRow, float zCol, int& iRow, int& iCol)
80 {
81  // convert to row/col w/o over/underflow check
82  xRow = 0.5 * (ActiveMatrixSizeRows - PassiveEdgeTop + PassiveEdgeReadOut) - xRow; // coordinate wrt top edge of Active matrix
83  zCol += 0.5 * ActiveMatrixSizeCols; // coordinate wrt left edge of Active matrix
84  iRow = int(xRow / PitchRow);
85  iCol = int(zCol / PitchCol);
86  if (xRow < 0)
87  iRow -= 1;
88  if (zCol < 0)
89  iCol -= 1;
90 }
91 
92 //_________________________________________________________________________________________________
93 inline bool SegmentationAlpide::localToDetector(float xRow, float zCol, int& iRow, int& iCol)
94 {
95  // convert to row/col
96  xRow = 0.5 * (ActiveMatrixSizeRows - PassiveEdgeTop + PassiveEdgeReadOut) - xRow; // coordinate wrt left edge of Active matrix
97  zCol += 0.5 * ActiveMatrixSizeCols; // coordinate wrt bottom edge of Active matrix
98  if (xRow < 0 || xRow >= ActiveMatrixSizeRows || zCol < 0 || zCol >= ActiveMatrixSizeCols) {
99  iRow = iCol = -1;
100  return false;
101  }
102  iRow = int(xRow / PitchRow);
103  iCol = int(zCol / PitchCol);
104  return true;
105 }
106 
107 //_________________________________________________________________________________________________
108 inline void SegmentationAlpide::detectorToLocalUnchecked(int iRow, int iCol, float& xRow, float& zCol)
109 {
110  xRow = getFirstRowCoordinate() - iRow * PitchRow;
111  zCol = iCol*PitchCol + getFirstColCoordinate();
112 }
113 
114 //_________________________________________________________________________________________________
115 inline void SegmentationAlpide::detectorToLocalUnchecked(float row, float col, float& xRow, float& zCol)
116 {
117  xRow = getFirstRowCoordinate() - row * PitchRow;
118  zCol = col * PitchCol + getFirstColCoordinate();
119 }
120 
121 //_________________________________________________________________________________________________
122 inline void SegmentationAlpide::detectorToLocalUnchecked(float row, float col, TVector3& loc)
123 {
124  loc.SetXYZ(getFirstRowCoordinate() - row * PitchRow, 0.f, col * PitchCol + getFirstColCoordinate());
125 }
126 
127 //_________________________________________________________________________________________________
128 inline bool SegmentationAlpide::detectorToLocal(int iRow, int iCol, float& xRow, float& zCol)
129 {
130  if (iRow < 0 || iRow >= NRows || iCol<0 || iCol >= NCols)
131  return false;
132  detectorToLocalUnchecked(iRow,iCol,xRow,zCol);
133  return true;
134 }
135 
136 //_________________________________________________________________________________________________
137 inline bool SegmentationAlpide::detectorToLocal(float row, float col, float& xRow, float& zCol)
138 {
139  if (row < 0 || row >= NRows || col < 0 || col >= NCols)
140  return false;
141  detectorToLocalUnchecked(row, col, xRow, zCol);
142  return true;
143 }
144 
145 //_________________________________________________________________________________________________
146 inline bool SegmentationAlpide::detectorToLocal(float row, float col, TVector3& loc)
147 {
148  if (row < 0 || row >= NRows || col < 0 || col >= NCols)
149  return false;
150  detectorToLocalUnchecked(row, col, loc);
151  return true;
152 }
153 
154 #endif