* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
- $Log$
-*/
+/* $Id$ */
+
#include "AliRICHSegmentation.h"
+
ClassImp(AliRICHSegmentation)
+
+//________________________________________________________________________________
+AliRICHSegmentation::AliRICHSegmentation()
+{
+ fNpx=144; // Number of pads in x direction
+ fNpy=160; // Number of pads in y direction
+ fSector=-1;
+ fDeadZone=3.0; // spacer between photocathod planes cm
+ fDpx=0.84; // Pad x size cm
+ fDpy=0.8; // Pad y size cm
+ fWireD=0.84/2; // cm set by SetDAnod
+}//AliRICHSegmentation::ctor()
+
+void AliRICHSegmentation::Init()
+{
+ Float_t csi_length = fNpy*fDpy + fDeadZone;
+ Float_t csi_width = fNpx*fDpx + 2*fDeadZone;
+
+ fPadPlane_Width = (csi_width - 2*fDeadZone)/3;
+ fPadPlane_Length = (csi_length - fDeadZone)/2;
+}//void AliRICHSegmentation::Init()
+
+// calculate sector from x-y coordinates
+
+Int_t AliRICHSegmentation::Sector(Float_t x, Float_t y)
+{
+// Calculate to which sector does the hit (x,y) belong
+
+ fSector=-1;
+
+ //Parametrized definition
+
+ if (y<-fDeadZone/2)
+ {
+ if (x> fPadPlane_Width/2 +fDeadZone)
+ {
+ if ( x<fPadPlane_Width/2 +fDeadZone + fPadPlane_Width)
+ fSector=0;
+ }
+ if (x< fPadPlane_Width/2)
+ {
+ if (x> -( fPadPlane_Width/2))
+ fSector=2;
+ }
+ if (x< -( fPadPlane_Width/2 +fDeadZone))
+ {
+ if (x> -( fPadPlane_Width/2 +fDeadZone + fPadPlane_Width))
+ fSector=4;
+ }
+ }
+ else if (y>fDeadZone/2)
+ {
+ if (x> fPadPlane_Width/2 +fDeadZone)
+ {
+ if (x< fPadPlane_Width/2 +fDeadZone + fPadPlane_Width)
+ fSector=1;
+ }
+ if (x< fPadPlane_Width/2)
+ {
+ if (x> -( fPadPlane_Width/2))
+ fSector=3;
+ }
+ if (x< -( fPadPlane_Width/2 +fDeadZone))
+ {
+ if (x> -( fPadPlane_Width/2 +fDeadZone + fPadPlane_Width))
+ fSector=5;
+ }
+ }
+
+ return fSector;
+}//Int_t AliRICHSegmentation::Sector(Float_t x, Float_t y)
+
+
+void AliRICHSegmentation::GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy)
+{
+// real coordinates (x,y) -> (ix,iy) pad numbers
+//
+// Please check origin of pad numbering !!!
+
+ Int_t sector=Sector(x,y);
+
+ //printf("Sector: %d\n",sector);
+
+ if (sector==0)
+ {
+ //ix = (x>0)? Int_t(x/fDpx)+1 : Int_t(x/fDpx);
+ //iy = (y>0)? Int_t(y/fDpy)+1 : Int_t(y/fDpy);
+ ix = Int_t ((x-fDeadZone)/fDpx);
+ iy = Int_t ((y+fDeadZone/2)/fDpy)-1;
+ }
+ if (sector==1)
+ {
+ ix = Int_t ((x-fDeadZone)/fDpx);
+ iy = Int_t ((y-fDeadZone/2)/fDpy);
+ }
+ if (sector==2)
+ {
+ ix = (x>=0)? ix = Int_t (x/fDpx) : ix = Int_t (x/fDpx)-1;
+ iy = Int_t ((y+fDeadZone/2)/fDpy)-1;
+ }
+ if (sector==3)
+ {
+ ix = (x>=0)? ix = Int_t (x/fDpx) : ix = Int_t (x/fDpx)-1;
+ iy = Int_t ((y-fDeadZone/2)/fDpy);
+ }
+ if (sector==4)
+ {
+ ix = Int_t ((x+fDeadZone)/fDpx)-1;
+ iy = Int_t ((y+fDeadZone/2)/fDpy)-1;
+ }
+ if (sector==5)
+ {
+ ix = Int_t ((x+fDeadZone)/fDpx)-1;
+ iy = Int_t ((y-fDeadZone/2)/fDpy);
+ }
+
+
+ //ix = Int_t (x/fDpx);
+ //iy = Int_t (y/fDpy);
+
+ //ix = (x>0)? Int_t(x/fDpx)+1 : Int_t(x/fDpx);
+ //iy = (y>0)? Int_t(y/fDpy)+1 : Int_t(y/fDpy);
+
+ if (sector==-1)
+ {
+ ix = fIxmax;
+ iy = fIymax;
+ }
+
+ if (iy > fNpy) iy= fNpy;
+ if (iy < -fNpy) iy=-fNpy;
+ if (ix > fNpx) ix= fNpx;
+ if (ix < -fNpx) ix=-fNpx;
+}//void AliRICHSegmentation::GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy)
+
+
+void AliRICHSegmentation::GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y)
+{
+//
+// pad numbers (ix,iy)->(x,y) real coordinates
+//
+
+ Int_t sector=-1;
+
+
+ Float_t padplane_width = fNpx/3;
+
+ if (iy<0)
+ {
+ if (ix < fNpx/2)
+ {
+ if (ix >= padplane_width/2)
+ sector=0;
+ }
+ if (ix< padplane_width/2)
+ {
+ if (ix >= -(padplane_width/2))
+ sector=2;
+ }
+ if (ix >= -(fNpx/2))
+ {
+ if (ix < -(padplane_width/2))
+ sector=4;
+ }
+ }
+ if (iy>=0)
+ {
+ if (ix < fNpx/2)
+ {
+ if (ix >= padplane_width/2)
+ sector=1;
+ }
+ if (ix< padplane_width/2)
+ {
+ if (ix >= -(padplane_width/2))
+ sector=3;
+ }
+ if (ix >= -(fNpx/2))
+ {
+ if (ix < -(padplane_width/2))
+ sector=5;
+ }
+ }
+
+ if (sector==0)
+ {
+ x = Float_t(ix)*fDpx+fDpx/2+fDeadZone;
+ y = Float_t(iy)*fDpy+fDpy/2-fDeadZone/2;
+ }
+ if (sector==1)
+ {
+ x = Float_t(ix)*fDpx+fDpx/2+fDeadZone;
+ y = Float_t(iy)*fDpy+fDpy/2+fDeadZone/2;
+ }
+ if (sector==2)
+ {
+ x = (ix>=0) ? x = Float_t(ix)*fDpx+fDpx/2 : x = Float_t(ix)*fDpx+fDpx/2;
+ y = Float_t(iy)*fDpy+fDpy/2-fDeadZone/2;
+ }
+ if (sector==3)
+ {
+ x = (ix>=0) ? x = Float_t(ix)*fDpx+fDpx/2 : x = Float_t(ix)*fDpx+fDpx/2;
+ y = Float_t(iy)*fDpy+fDpy/2+fDeadZone/2;
+ }
+ if (sector==4)
+ {
+ x = Float_t(ix)*fDpx+fDpx/2-fDeadZone;
+ y = Float_t(iy)*fDpy+fDpy/2-fDeadZone/2;
+ }
+ if (sector==5)
+ {
+ x = Float_t(ix)*fDpx+fDpx/2-fDeadZone;
+ y = Float_t(iy)*fDpy+fDpy/2+fDeadZone/2;
+ }
+
+}//void AliRICHSegmentation::GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y)
+
+
+void AliRICHSegmentation::IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
+{
+
+// Calculates integration limits
+
+ x1=fXhit-fX-fDpx/2.;
+ x2=x1+fDpx;
+ y1=fYhit-fY-fDpy/2.;
+ y2=y1+fDpy;
+}//void AliRICHSegmentation::IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
+
+
+Int_t AliRICHSegmentation::SigGenCond(Float_t x,Float_t y,Float_t)
+{
+//
+// Signal will be generated if particle crosses pad boundary or
+// boundary between two wires.
+ Int_t ixt, iyt;
+ GetPadI(x,y,ixt,iyt);
+ Int_t iwt=(x>0) ? Int_t(x/fWireD)+1 : Int_t(x/fWireD)-1;
+
+ if ((ixt != fIxt) || (iyt !=fIyt) || (iwt != fIwt)) {
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+
+void AliRICHSegmentation::SigGenInit(Float_t x,Float_t y,Float_t)
+{
+//
+// Initialises pad and wire position during stepping
+ fXt =x;
+ fYt =y;
+ GetPadI(x,y,fIxt,fIyt);
+ fIwt= (x>0) ? Int_t(x/fWireD)+1 : Int_t(x/fWireD)-1 ;
+}
+
+
+Float_t AliRICHSegmentation::GetAnod(Float_t xhit) const
+{
+
+// Get anod wire closer to hit
+
+ Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5;
+ return fWireD*wire;
+}
+
+
+void AliRICHSegmentation::SetHit(Float_t xhit, Float_t yhit)
+{
+//
+// Find the wire position (center of charge distribution)
+// Float_t x0a=GetAnod(xhit);
+ fXhit=xhit;
+ fYhit=yhit;
+}
+
+void AliRICHSegmentation::
+SetPad(Int_t ix, Int_t iy)
+{
+
+// Move to pad ix, iy
+
+ GetPadC(ix,iy,fX,fY);
+}
+
+
+
+void AliRICHSegmentation::
+FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy)
+{
+
+ //
+ // Find the wire position (center of charge distribution)
+ Float_t x0a=GetAnod(xhit);
+ fXhit=x0a;
+ fYhit=yhit;
+ //
+ // and take fNsigma*sigma around this center
+ Float_t x01=x0a - dx;
+ Float_t x02=x0a + dx;
+ Float_t y01=yhit - dy;
+ Float_t y02=yhit + dy;
+ //
+ // find the pads over which the charge distributes
+ GetPadI(x01,y01,fIxmin,fIymin);
+ GetPadI(x02,y02,fIxmax,fIymax);
+ //
+ // Set current pad to lower left corner
+ fIx=fIxmin;
+ fIy=fIymin;
+ GetPadC(fIx,fIy,fX,fY);
+
+ //if (fSector==2)
+ //printf("fIx: %d, fIy: %d fX: %f, fY: %f\n",fIx,fIy,fX,fY);
+}
+
+void AliRICHSegmentation::NextPad()
+{
+ //printf("\n Next Pad \n");
+
+ //
+ // Step to next pad in integration region
+ if (fIx <= fIxmax) {
+// if (fIx==-1) fIx++;
+ fIx++;
+ } else if (fIy <= fIymax) {
+// if (fIy==-1) fIy++;
+ fIx=fIxmin;
+ fIy++;
+ } else {
+ printf("\n Error: Stepping outside integration region\n ");
+ }
+ GetPadC(fIx,fIy,fX,fY);
+}
+
+Int_t AliRICHSegmentation::MorePads()
+{
+//
+// Are there more pads in the integration region
+
+ //printf("\n More Pads ? \n");
+
+
+ if (fIx >= fIxmax && fIy >= fIymax) {
+ //printf("There are no more pads\n\n\n\n\n");
+ return 0;
+ } else {
+ //printf("There are more pads\n\n");
+ return 1;
+ }
+}
+
+
+
+void AliRICHSegmentation::Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[7], Int_t Ylist[7])
+{
+//Is used for the cluster finder, include diagonal elements
+ *Nlist=4;Xlist[0]=Xlist[1]=iX;Xlist[2]=iX-1;Xlist[3]=iX+1;
+ Ylist[0]=iY-1;Ylist[1]=iY+1;Ylist[2]=Ylist[3]=iY;
+}//void AliRICHSegmentation::Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[7], Int_t Ylist[7])
+
+Float_t AliRICHSegmentation::Distance2AndOffset(Int_t iX, Int_t iY, Float_t X, Float_t Y, Int_t *dummy)
+{
+// Returns the square of the distance between 1 pad
+// labelled by its Channel numbers and a coordinate
+
+ Float_t x,y;
+ GetPadC(iX,iY,x,y);
+ return (x-X)*(x-X) + (y-Y)*(y-Y);
+}//Float_t AliRICHSegmentation::Distance2AndOffset(Int_t iX, Int_t iY, Float_t X, Float_t Y, Int_t *dummy)
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff