|
|
|
#include <TrackingTools/GeomPropagators/interface/StraightLineBarrelCylinderCrossing.h>
Public Member Functions | |
| std::pair< bool, double > | pathLength (const Cylinder &cyl) const |
| Propagation status (true if valid) and (signed) path length along the line from the starting point to the cylinder. | |
| GlobalPoint | position (const double s) const |
| Returns the position along the line that corresponds to path length "s" from the starting point. | |
| StraightLineBarrelCylinderCrossing (const GlobalPoint &startingPos, const GlobalVector &startingDir, const PropagationDirection propDir) | |
| Constructor uses global frame (barrel cylinders are by definition in global co-ordinates). | |
Private Types | |
| typedef GlobalVector | DirectionType |
| typedef Basic2DVector< float > | DirectionType2D |
| typedef GlobalPoint | PositionType |
| typedef Basic2DVector< float > | PositionType2D |
Private Member Functions | |
| std::pair< bool, double > | chooseSolution (const double s1, const double s2) const |
| Chooses the right solution w.r.t. the propagation direction. | |
Private Attributes | |
| const DirectionType | theP0 |
| const PropagationDirection | thePropDir |
| const PositionType | theX0 |
Definition at line 17 of file StraightLineBarrelCylinderCrossing.h.
typedef GlobalVector StraightLineBarrelCylinderCrossing::DirectionType [private] |
Definition at line 48 of file StraightLineBarrelCylinderCrossing.h.
typedef Basic2DVector<float> StraightLineBarrelCylinderCrossing::DirectionType2D [private] |
Definition at line 50 of file StraightLineBarrelCylinderCrossing.h.
typedef GlobalPoint StraightLineBarrelCylinderCrossing::PositionType [private] |
Definition at line 47 of file StraightLineBarrelCylinderCrossing.h.
typedef Basic2DVector<float> StraightLineBarrelCylinderCrossing::PositionType2D [private] |
Definition at line 49 of file StraightLineBarrelCylinderCrossing.h.
| StraightLineBarrelCylinderCrossing::StraightLineBarrelCylinderCrossing | ( | const GlobalPoint & | startingPos, | |
| const GlobalVector & | startingDir, | |||
| const PropagationDirection | propDir | |||
| ) |
Constructor uses global frame (barrel cylinders are by definition in global co-ordinates).
Definition at line 8 of file StraightLineBarrelCylinderCrossing.cc.
00009 : 00010 theX0(startingPos), 00011 theP0(startingDir.unit()), 00012 thePropDir(propDir) {}
| std::pair< bool, double > StraightLineBarrelCylinderCrossing::chooseSolution | ( | const double | s1, | |
| const double | s2 | |||
| ) | const [private] |
Chooses the right solution w.r.t. the propagation direction.
Definition at line 39 of file StraightLineBarrelCylinderCrossing.cc.
References alongMomentum, anyDirection, and thePropDir.
Referenced by pathLength().
00041 { 00042 // 00043 // follows the logic implemented in HelixBarrelCylinderCrossing 00044 // 00045 if ( thePropDir==anyDirection ) { 00046 return std::pair<bool,double>(true,(fabs(s1)<fabs(s2)?s1:s2)); 00047 } 00048 else { 00049 int propSign = thePropDir==alongMomentum ? 1 : -1; 00050 if ( s1*s2 < 0) { 00051 // if different signs return the positive one 00052 return std::pair<bool,double>(true,((s1*propSign>0)?s1:s2)); 00053 } 00054 else if ( s1*propSign>0 ) { 00055 // if both positive, return the shortest 00056 return std::pair<bool,double>(true,(fabs(s1)<fabs(s2)?s1:s2)); 00057 } 00058 } 00059 return std::pair<bool,double>(false,0.); 00060 }
| std::pair< bool, double > StraightLineBarrelCylinderCrossing::pathLength | ( | const Cylinder & | cyl | ) | const |
Propagation status (true if valid) and (signed) path length along the line from the starting point to the cylinder.
Definition at line 15 of file StraightLineBarrelCylinderCrossing.cc.
References chooseSolution(), edm::eq(), dttmaxenums::R, Cylinder::radius(), theP0, theX0, Surface::toGlobal(), PV3DBase< T, PVType, FrameType >::x(), and PV3DBase< T, PVType, FrameType >::y().
Referenced by RKPropagatorInS::propagateParametersOnCylinder(), and AnalyticalPropagator::propagateWithLineCrossing().
00016 { 00017 // 00018 // radius of cylinder and transversal position relative to axis 00019 // 00020 double R(cylinder.radius()); 00021 GlobalPoint axis(cylinder.toGlobal(Cylinder::LocalPoint(0.,0.))); 00022 PositionType2D xt2d(theX0.x()-axis.x(),theX0.y()-axis.y()); 00023 // 00024 // transverse direction 00025 // 00026 DirectionType2D pt2d(theP0.x(),theP0.y()); 00027 // 00028 // solution of quadratic equation for s - assume |theP0|=1 00029 // 00030 RealQuadEquation eq(pt2d.mag2(),2.*xt2d.dot(pt2d),xt2d.mag2()-R*R); 00031 if ( !eq.hasSolution ) return std::pair<bool,double>(false,0.); 00032 // 00033 // choice of solution and verification of direction 00034 // 00035 return chooseSolution(eq.first,eq.second); 00036 }
| GlobalPoint StraightLineBarrelCylinderCrossing::position | ( | const double | s | ) | const [inline] |
Returns the position along the line that corresponds to path length "s" from the starting point.
If s is obtained from the pathLength method the position is the intersection point with the cylinder.
Definition at line 37 of file StraightLineBarrelCylinderCrossing.h.
Referenced by RKPropagatorInS::propagateParametersOnCylinder(), and AnalyticalPropagator::propagateWithLineCrossing().
00037 { return GlobalPoint(theX0+s*theP0);}
const DirectionType StraightLineBarrelCylinderCrossing::theP0 [private] |
Definition at line 53 of file StraightLineBarrelCylinderCrossing.h.
Referenced by pathLength(), and position().
const PropagationDirection StraightLineBarrelCylinderCrossing::thePropDir [private] |
const PositionType StraightLineBarrelCylinderCrossing::theX0 [private] |
Definition at line 52 of file StraightLineBarrelCylinderCrossing.h.
Referenced by pathLength(), and position().
1.5.4