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GeometryHelper Class Reference

#include <GeometryHelper.h>

List of all members.

Public Member Functions

 GeometryHelper (const VldContext &vldc)
 GeometryHelper (const TrackContext &)
Double_t GetZ (PlexPlaneId id)
Double_t GetZVtx (PlexPlaneId id, Int_t idir)
Double_t GetX0 (PlexPlaneId id)
Double_t GetdZSteel (PlexPlaneId id)
UgliScintPlnHandle GetScintPlnHandle (const PlexPlaneId &planeid)
void xy2uv (Float_t x, Float_t y, Float_t &u, Float_t &v) const
void uv2xy (Float_t u, Float_t v, Float_t &x, Float_t &y) const
void xy2uv (Double_t x, Double_t y, Double_t &u, Double_t &v) const
void uv2xy (Double_t u, Double_t v, Double_t &x, Double_t &y) const
Float_t GetRotationCorrectedTPos (const CandStripHandle *csh, const CandTrackHandle *cth)
Float_t GetRotationCorrectedTPos (const Reco::Strip_t strip, const CandTrackHandle *cth)

Private Attributes

VldContext fVldc
UgliGeomHandle fUgh

Detailed Description

Utility class provides methods to access geometry data used by the fitter.

Author:
Sergei avva@fnal.gov

Definition at line 21 of file GeometryHelper.h.

Constructor & Destructor Documentation

GeometryHelper::GeometryHelper (  const VldContext &  vldc  ) 
 

Definition at line 31 of file GeometryHelper.cxx.

00031                                                      :
00032     fVldc(vldc), fUgh(vldc)
00033 {
00034     TracerSA trace("GeometryHelper::GeometryHelper(const VldContext& vldc)");
00035 }

GeometryHelper::GeometryHelper (  const TrackContext &  tc  ) 
 

Definition at line 40 of file GeometryHelper.cxx.

References tc.

00040                                                      :
00041     fVldc(tc.GetVldContext()), fUgh(tc.GetVldContext())
00042 {
00043     TracerSA trace("GeometryHelper::GeometryHelper(const VldContext& vldc)");
00044 }

Member Function Documentation

Double_t GeometryHelper::GetdZSteel (  PlexPlaneId  id  ) 
 

steel thickness

Definition at line 116 of file GeometryHelper.cxx.

References fUgh, UgliSteelPlnHandle::GetHalfThickness(), and UgliGeomHandle::GetSteelPlnHandle().

Referenced by DataFT::Init().

00117 {
00118     // Steel thickness
00119     Double_t dZSteel=0.;    
00120     
00121     // 
00122     id.SetIsSteel(kTRUE);
00123     if ( id.IsValid() ) {
00124         UgliSteelPlnHandle ustph = fUgh.GetSteelPlnHandle(id);
00125         dZSteel += 2.*ustph.GetHalfThickness();
00126     }
00127     
00128     return dZSteel;
00129 }

Float_t GeometryHelper::GetRotationCorrectedTPos (  const Reco::Strip_t  strip,
const CandTrackHandle *  cth
) 
 

get position of the strip corrected for plane rotations

Definition at line 161 of file GeometryHelper.cxx.

References fUgh, UgliGeomHandle::GetStripHandle(), UgliStripHandle::GetTPos(), CandTrackHandle::GetU(), CandTrackHandle::GetV(), MSG, and Reco::Strip_t.

00163 {
00164     Int_t plane = strip->GetPlane();
00165     Float_t lpos(0.);
00166     // get lpos from the track (calculated by the tracker or fitter)
00167     if ( strip->GetPlaneView() == PlaneView::kU ) {
00168         lpos = cth->GetV(plane);
00169     } else if ( strip->GetPlaneView() == PlaneView::kV ) {
00170         lpos = cth->GetU(plane);
00171     }
00172 
00173     // check that lpos value looks valid
00174     if ( fabs(lpos) > 5 ) {
00175         MSG("FitTrackSA", Msg::kDebug) << "lpos = " << lpos  
00176         << " is either bad fit or hasn't been calculated, setting it to 0." 
00177         << endl;
00178         lpos = 0.;
00179     }
00180     
00181     UgliStripHandle ush = fUgh.GetStripHandle(strip->GetStripEndId());
00182     return ush.GetTPos(lpos);
00183 }

Float_t GeometryHelper::GetRotationCorrectedTPos (  const CandStripHandle *  csh,
const CandTrackHandle *  cth
) 
 

get position of the strip corrected for plane rotations

Definition at line 134 of file GeometryHelper.cxx.

References fUgh, CandStripHandle::GetPlane(), CandStripHandle::GetPlaneView(), CandStripHandle::GetStripEndId(), UgliGeomHandle::GetStripHandle(), UgliStripHandle::GetTPos(), CandTrackHandle::GetU(), CandTrackHandle::GetV(), and MSG.

Referenced by DataFT::OneStripPlane(), and DataFT::TwoStripPlane().

00136 {
00137     Int_t plane = csh->GetPlane();
00138     Float_t lpos(0.);
00139     // get lpos from the track (calculated by the tracker or fitter)
00140     if ( csh->GetPlaneView() == PlaneView::kU ) {
00141         lpos = cth->GetV(plane);
00142     } else if ( csh->GetPlaneView() == PlaneView::kV ) {
00143         lpos = cth->GetU(plane);
00144     }
00145 
00146     // check that lpos value looks valid
00147     if ( fabs(lpos) > 5 ) {
00148         MSG("FitTrackSA", Msg::kDebug) << "lpos = " << lpos  
00149         << " is either bad fit or hasn't been calculated, setting it to 0." 
00150         << endl;
00151         lpos = 0.;
00152     }
00153     
00154     UgliStripHandle ush = fUgh.GetStripHandle(csh->GetStripEndId());
00155     return ush.GetTPos(lpos);
00156 }

UgliScintPlnHandle GeometryHelper::GetScintPlnHandle (  const PlexPlaneId &  planeid  )  [inline]
 

Definition at line 50 of file GeometryHelper.h.

00051                             { return fUgh.GetScintPlnHandle(planeid);};

Double_t GeometryHelper::GetX0 (  PlexPlaneId  id  ) 
 

radiation lengths in the i-th plane (both steel and scint)

Definition at line 95 of file GeometryHelper.cxx.

References fUgh, UgliSteelPlnHandle::GetHalfThickness(), UgliPlnHandle::GetHalfThickness(), UgliGeomHandle::GetScintPlnHandle(), and UgliGeomHandle::GetSteelPlnHandle().

Referenced by DataFT::Init().

00096 {
00097     // Amount of material in units of radiation length
00098     Double_t x0=0.;
00099     // add X0 of scint        
00100     if ( id.IsValid() ) {
00101         UgliScintPlnHandle uscph = fUgh.GetScintPlnHandle(id);
00102         x0 += 2.*uscph.GetHalfThickness()/X0_Scint;
00103     }
00104     // add X0 of steel
00105     id.SetIsSteel(kTRUE);
00106     if ( id.IsValid() ) {
00107         UgliSteelPlnHandle ustph = fUgh.GetSteelPlnHandle(id);
00108         x0 += 2.*ustph.GetHalfThickness()/X0_Steel;
00109     }
00110     return x0;
00111 }

Double_t GeometryHelper::GetZ (  PlexPlaneId  id  ) 
 

z-position of the i-th plane

Definition at line 50 of file GeometryHelper.cxx.

References fUgh, UgliGeomHandle::GetScintPlnHandle(), UgliGeomHandle::GetSteelPlnHandle(), UgliSteelPlnHandle::GetZ0(), and UgliPlnHandle::GetZ0().

Referenced by GetZVtx(), and DataFT::Init().

00051 {
00052     // Return z-position of the i-th scint plane (or the i-th steel 
00053     // plane in case there is no scintillator)
00054     if ( id.IsValid() ) {
00055         UgliScintPlnHandle usph = fUgh.GetScintPlnHandle(id);
00056         return usph.GetZ0();
00057     }
00058 
00059     // not valid === no scint plane here - use Z of steel     
00060     id.SetIsSteel(kTRUE);
00061     if ( id.IsValid() ) {
00062         UgliSteelPlnHandle usph = fUgh.GetSteelPlnHandle(id);
00063         return usph.GetZ0();
00064     }
00065     
00066     // should never get here
00067     assert(!"Neither scint, not steel are valid here");
00068     return 0.;
00069 }

Double_t GeometryHelper::GetZVtx (  PlexPlaneId  id,
Int_t  idir
) 
 

z-position of the track vertex

Definition at line 77 of file GeometryHelper.cxx.

References fUgh, PlexPlaneId::GetAdjoinSteel(), UgliGeomHandle::GetSteelPlnHandle(), GetZ(), UgliSteelPlnHandle::GetZ0(), and PlexPlaneId::IsValid().

Referenced by DataFT::Init().

00078 {
00079     // get the adjoin steel plane; note direction '-idir' - 
00080     // we want a "previous" plane
00081     PlexPlaneId prevSteel = begin.GetAdjoinSteel(-idir);
00082     if ( prevSteel.IsValid() ) {
00083         // have a steel plane
00084         UgliSteelPlnHandle usph = fUgh.GetSteelPlnHandle(prevSteel);
00085         return usph.GetZ0();
00086     } else {
00087         // no steel plane - just go 0.03m "upstream" of beg plane
00088         return GetZ(begin) - idir*0.03;                
00089     }
00090 }

void GeometryHelper::uv2xy (  Double_t  u,
Double_t  v,
Double_t &  x,
Double_t &  y
)  const [inline]
 

Definition at line 65 of file GeometryHelper.h.

00066                     { fUgh.uv2xy(u, v, x, y); };

void GeometryHelper::uv2xy (  Float_t  u,
Float_t  v,
Float_t &  x,
Float_t &  y
)  const [inline]
 

Definition at line 59 of file GeometryHelper.h.

Referenced by DataFT::SwimAsSwimmer().

00060                     { fUgh.uv2xy(u, v, x, y); };

void GeometryHelper::xy2uv (  Double_t  x,
Double_t  y,
Double_t &  u,
Double_t &  v
)  const [inline]
 

Definition at line 62 of file GeometryHelper.h.

00063                     { fUgh.xy2uv(x, y, u, v); };

void GeometryHelper::xy2uv (  Float_t  x,
Float_t  y,
Float_t &  u,
Float_t &  v
)  const [inline]
 

UV <-> XY conversion functions

Definition at line 56 of file GeometryHelper.h.

Referenced by DataFT::SwimAsSwimmer().

00057                     { fUgh.xy2uv(x, y, u, v); };

Member Data Documentation

UgliGeomHandle GeometryHelper::fUgh [private]
 

Definition at line 82 of file GeometryHelper.h.

Referenced by GetdZSteel(), GetRotationCorrectedTPos(), GetX0(), GetZ(), and GetZVtx().

VldContext GeometryHelper::fVldc [private]
 

Definition at line 81 of file GeometryHelper.h.

The documentation for this class was generated from the following files:
Generated on Mon Feb 15 11:09:14 2010 for loon by  doxygen 1.3.9.1