+/***************************************************************************
+ * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * *
+ * Author: The ALICE Off-line Project. *
+ * Contributors are mentioned in the code where appropriate. *
+ * *
+ * Permission to use, copy, modify and distribute this software and its *
+ * documentation strictly for non-commercial purposes is hereby granted *
+ * without fee, provided that the above copyright notice appears in all *
+ * copies and that both the copyright notice and this permission notice *
+ * appear in the supporting documentation. The authors make no claims *
+ * about the suitability of this software for any purpose. It is *
+ * provided "as is" without express or implied warranty. *
+ **************************************************************************/
//-----------------------------------------------------//
// //
// //
// //
//-----------------------------------------------------//
+#include "Riostream.h"
#include "AliPMDUtility.h"
#include "TMath.h"
#include <stdio.h>
+#include <math.h>
+
ClassImp(AliPMDUtility)
AliPMDUtility::AliPMDUtility()
{
+ // Default constructor
fPx = 0.;
fPy = 0.;
fPz = 0.;
fPhi = 0.;
}
-AliPMDUtility::AliPMDUtility(Float_t Px, Float_t Py, Float_t Pz)
+AliPMDUtility::AliPMDUtility(Float_t px, Float_t py, Float_t pz)
{
- fPx = Px;
- fPy = Py;
- fPz = Pz;
+ // Constructor
+ fPx = px;
+ fPy = py;
+ fPz = pz;
fTheta = 0.;
fEta = 0.;
fPhi = 0.;
AliPMDUtility::~AliPMDUtility()
{
-
+ // Default destructor
}
void AliPMDUtility::HexGeomCellPos(Int_t ism, Int_t xpad, Int_t ypad, Float_t &xpos, Float_t &ypos)
{
+ // This converts PMD cluster or CELL coordinates
+ // to Global coordinates.
+ // Written by Prof. S.C. Phatak
+
+ const Float_t kCellDia = 0.5;
+ const Float_t kPi = TMath::Pi(); //3.14159;
+ const Double_t kSqroot3by2 = 0.8660254; // sqrth = sqrt(3.)/2.
+ Int_t i;
Int_t j = xpad;
Int_t k = ypad;
- // Supermodeule number starting from 0
-
- /*
- This converts PMD cluster or CELL coordinates
- to Global coordinates.
- Written by Prof. S.C. Phatak
- */
-
- Int_t i;
- Float_t celldia = 0.5;
- const Float_t pi = 3.14159;
- const double sqrth=0.8660254; // sqrth = sqrt(3.)/2.
/*
+ Supermodeule number starting from 0
ism --> supermodule no ( 0 - 26 )
idet --> detector ( pmd or cpv : not required now )
j --> xpad ( goes from 1 to 72 )
(xp0,yp0) corner positions of all supermodules in global
coordinate system. That is the origin
of the local ( supermodule ) coordinate system.
-*/
+ */
Float_t xp0[27] =
{
supermodules
*/
- Float_t th[3] = {0., -2.*pi/3., 2.*pi/3.};
+ Float_t th[3] = {0., -2.*kPi/3., 2.*kPi/3.};
Float_t xr, yr, xinit, yinit, cs, sn;
/*
xinit and yinit are coordinates of the cell in local coordinate system
*/
- xinit = (j)*celldia+(k)/2.*celldia;
- yinit = sqrth*(k)/2.;
+ xinit = (j)*kCellDia+(k)/2.*kCellDia;
+ yinit = kSqroot3by2*(k)/2.;
i=ism/9;
cs=cos(th[i]);
sn=sin(th[i]);
//
// ism : number of supermodules in one plane = 4
// ium : number of unitmodules in one SM = 6
- // gb_um : (global) unit module numbering in a supermodule
+ // gbum : (global) unit module numbering in a supermodule
//
- Int_t gb_um = ism*6 + ium;
+ Int_t gbum = ism*6 + ium;
Int_t irow = xpad;
Int_t icol = ypad;
// Corner positions (x,y) of the 24 unit moudles in ALICE PMD
- double xcorner[24] =
+ Double_t xcorner[24] =
{
85.15, 60.85, 36.55, 85.15, 60.85, 36.55, //SMA
-85.15, -60.85, -36.55, -85.15, -60.85, -36.55, //SMAR
-84.90, -36.60, -84.90, -36.60, -84.90, -36.60 //SMBR
};
- double ycorner[24] =
+ Double_t ycorner[24] =
{
32.45708755, 32.45708755, 32.45708755, //SMA
-9.30645245, -9.30645245, -9.30645245, //SMA
52.61435544, 73.59330270, 73.59330270 //SMBR
};
- const Float_t root_3 = 1.73205; // sqrt(3.);
- const Float_t cell_radius = 0.25;
+ const Float_t kSqroot3 = 1.73205; // sqrt(3.);
+ const Float_t kCellRadius = 0.25;
//
//Every even row of cells is shifted and placed
//in geant so this condition
//
- Float_t shift;
+ Float_t shift = 0.0;
if(irow%2 == 0)
{
shift = 0.25;
}
if(ism == 0 || ism == 2)
{
- ypos = ycorner[gb_um] +
- irow*cell_radius*root_3;
+ ypos = ycorner[gbum] +
+ irow*kCellRadius*kSqroot3;
+
+ xpos = xcorner[gbum] -
+ icol*2.0*kCellRadius - shift;
+ }
+ else if(ism == 1 || ism == 3)
+ {
+ ypos = ycorner[gbum] -
+ irow*kCellRadius*kSqroot3;
+
+ xpos = xcorner[gbum] +
+ icol*2.0*kCellRadius + shift;
+ }
+}
+
+void AliPMDUtility::RectGeomCellPos(Int_t ism, Int_t ium, Float_t xpad, Float_t ypad, Float_t &xpos, Float_t &ypos)
+{
+ // If the xpad and ypad inputs are float, then 0.5 is added to it
+ // to find the layer which is shifted.
+ // This routine finds the cell eta,phi for the new PMD rectangular
+ // geometry in ALICE
+ // Authors : Bedanga Mohanty and Dipak Mishra - 29.4.2003
+ // modified by B. K. Nnadi for change of coordinate sys
+ //
+ // SMA ---> Supermodule Type A ( SM - 0)
+ // SMAR ---> Supermodule Type A ROTATED ( SM - 1)
+ // SMB ---> Supermodule Type B ( SM - 2)
+ // SMBR ---> Supermodule Type B ROTATED ( SM - 3)
+ //
+ // ism : number of supermodules in one plane = 4
+ // ium : number of unitmodules in one SM = 6
+ // gbum : (global) unit module numbering in a supermodule
+ //
+
+ Int_t gbum = ism*6 + ium;
+ Float_t irow = xpad;
+ Float_t icol = ypad;
+
+ // Corner positions (x,y) of the 24 unit moudles in ALICE PMD
+
+ Double_t xcorner[24] =
+ {
+ 85.15, 60.85, 36.55, 85.15, 60.85, 36.55, //SMA
+ -85.15, -60.85, -36.55, -85.15, -60.85, -36.55, //SMAR
+ 84.90, 36.60, 84.90, 36.60, 84.90, 36.60, //SMB
+ -84.90, -36.60, -84.90, -36.60, -84.90, -36.60 //SMBR
+ };
+
+ Double_t ycorner[24] =
+ {
+ 32.45708755, 32.45708755, 32.45708755, //SMA
+ -9.30645245, -9.30645245, -9.30645245, //SMA
+ -32.45708755, -32.45708755, -32.45708755, //SMAR
+ 9.30645245, 9.30645245, 9.30645245, //SMAR
+ -31.63540818, -31.63540818, -52.61435544, //SMB
+ -52.61435544, -73.59330270, -73.59330270, //SMB
+ 31.63540818, 31.63540818, 52.61435544, //SMBR
+ 52.61435544, 73.59330270, 73.59330270 //SMBR
+ };
+
+ const Float_t kSqroot3 = 1.73205; // sqrt(3.);
+ const Float_t kCellRadius = 0.25;
+
+ //
+ //Every even row of cells is shifted and placed
+ //in geant so this condition
+ //
+ Float_t shift = 0.0;
+ Int_t iirow = (Int_t) (irow+0.5);
+ if(iirow%2 == 0)
+ {
+ shift = 0.25;
+ }
+ else
+ {
+ shift = 0.0;
+ }
+ if(ism == 0 || ism == 2)
+ {
+ ypos = ycorner[gbum] +
+ irow*kCellRadius*kSqroot3;
- xpos = xcorner[gb_um] -
- icol*2.0*cell_radius - shift;
+ xpos = xcorner[gbum] -
+ icol*2.0*kCellRadius - shift;
}
else if(ism == 1 || ism == 3)
{
- ypos = ycorner[gb_um] -
- irow*cell_radius*root_3;
+ ypos = ycorner[gbum] -
+ irow*kCellRadius*kSqroot3;
- xpos = xcorner[gb_um] +
- icol*2.0*cell_radius + shift;
+ xpos = xcorner[gbum] +
+ icol*2.0*kCellRadius + shift;
}
}
-void AliPMDUtility::SetPxPyPz(Float_t Px, Float_t Py, Float_t Pz)
+void AliPMDUtility::SetPxPyPz(Float_t px, Float_t py, Float_t pz)
{
- fPx = Px;
- fPy = Py;
- fPz = Pz;
+ fPx = px;
+ fPy = py;
+ fPz = pz;
}
-void AliPMDUtility::SetXYZ(Float_t xPos, Float_t yPos, Float_t zPos)
+void AliPMDUtility::SetXYZ(Float_t xpos, Float_t ypos, Float_t zpos)
{
- fPx = xPos;
- fPy = yPos;
- fPz = zPos;
+ fPx = xpos;
+ fPy = ypos;
+ fPz = zpos;
}
void AliPMDUtility::CalculateEta()
{
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