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2 | #include "AliFmThreeVectorD.h" | |
3 | // - not needed (which is good because we want no STAR-dependence! 25apr2006) - #include "StEvent/StTpcHit.h" | |
4 | #include "TMath.h" | |
5 | ||
6 | ||
7 | //__________________________________ | |
8 | ||
9 | ||
10 | ||
11 | int TpcLocalTransform(AliFmThreeVectorD& aPoint, int& aSector, int& aRow, | |
12 | float& aU, double& aPhi){ | |
13 | static int tNPadAtRow[45]={ | |
14 | 88,96,104,112,118,126,134,142,150,158,166,174,182, | |
15 | 98,100,102,104,106,106,108,110,112,112,114,116,118,120,122,122, | |
16 | 124,126,128,128,130,132,134,136,138,138,140,142,144,144,144,144}; | |
17 | static double tSectToPhi[24]={2.,1.,0.,11.,10.,9.,8. ,7. ,6.,5.,4.,3., | |
18 | 4.,5.,6., 7., 8.,9.,10.,11.,0.,1.,2.,3.}; | |
19 | //static double tPhiToSect[24]={2.,1.,0.,11.,10.,9.,8. ,7. ,6.,5.,4.,3., | |
20 | // 4.,5.,6., 7., 8.,9.,10.,11.,0.,1.,2.,3.}; | |
21 | static double tPadWidthInner = 0.335; | |
22 | static double tPadWidthOuter = 0.67; | |
23 | ||
24 | static double tPi = TMath::Pi(); | |
25 | // --- find sector number | |
26 | aPhi = aPoint.Phi(); | |
27 | if(aPhi<0.) aPhi+=(2*tPi); | |
28 | aPhi += tPi/12.; | |
29 | if(aPhi>2*tPi) aPhi-=2*tPi; | |
30 | int tiPhi = (int) (aPhi/tPi*6.); | |
31 | if(aPoint.z()<0) { | |
32 | aSector = (tiPhi<3)? 3-tiPhi : 15-tiPhi; | |
33 | } | |
34 | else{ | |
35 | aSector = (tiPhi<4)? 21+tiPhi : 9+tiPhi; | |
36 | } | |
37 | aPhi = tSectToPhi[aSector-1]*tPi/6.; | |
38 | //if((fabs(aPhi-aPoint.phi())>(tPi/12)){ | |
39 | //cout << "Sector missmatch " << aPhi << " " << aPoint.phi() << " " | |
40 | // << aSector << endl; | |
41 | //} | |
42 | ||
43 | // --- calculate local coordinate | |
44 | float tR = aPoint.x()*cos(aPhi)+aPoint.y()*sin(aPhi); | |
45 | aU = -aPoint.x()*sin(aPhi)+aPoint.y()*cos(aPhi); | |
46 | ||
47 | // --- find pad row | |
48 | if(tR<57.6) { | |
49 | aRow = 0; | |
50 | return 1; | |
51 | } | |
52 | float radmax = 62.4; | |
53 | float spacing= 4.8; | |
54 | aRow=1; | |
55 | while(tR>radmax && aRow<46){ | |
56 | aRow++; | |
57 | if(aRow==8){ | |
58 | radmax = 96.2; | |
59 | spacing = 5.2; | |
60 | } | |
61 | else{ | |
62 | if (aRow==13){ | |
63 | radmax = 126.195; // lots of stuf in row 13! | |
64 | spacing = 2.0; | |
65 | } | |
66 | else{ | |
67 | radmax+=spacing; | |
68 | } | |
69 | } | |
70 | } | |
71 | if(aRow>45){ | |
72 | //cout << "No pad row " << tR << endl; | |
73 | return 2; | |
74 | } | |
75 | ||
76 | // --- Check if u (=aU) inbound | |
77 | double tPadWidth = aRow<14? tPadWidthInner : tPadWidthOuter; | |
78 | if(fabs(aU) > tNPadAtRow[aRow-1]*tPadWidth/2.){ | |
79 | return 3; | |
80 | } | |
81 | ||
82 | return 0; | |
83 | } | |
84 | ||
85 | ||
86 | ||
87 | ||
88 | ||
89 |