#include <SurfXYZPlane.h>

Inheritance diagram for trkf::SurfXYZPlane:

Public Member Functions
	SurfXYZPlane ()
	Default constructor. More...

	SurfXYZPlane (double x0, double y0, double z0, double phi, double theta)
	Initializing constructor (angles). More...

	SurfXYZPlane (double x0, double y0, double z0, double nx, double ny, double nz)
	Initializing constructor (normal vector). More...

virtual	~SurfXYZPlane ()
	Destructor. More...

double	x0 () const
	X origin. More...

double	y0 () const
	Y origin. More...

double	z0 () const
	Z origin. More...

double	phi () const
	Rot. angle about x-axis (wire angle). More...

double	theta () const
	Rot. angle about y'-axis (projected Lorentz angle). More...

virtual Surface *	clone () const
	Clone method. More...

virtual bool	isTrackValid (const TrackVector &vec) const
	Surface-specific tests of validity of track parameters. More...

virtual void	toLocal (const double xyz[3], double uvw[3]) const
	Transform global to local coordinates. More...

virtual void	toGlobal (const double uvw[3], double xyz[3]) const
	Transform local to global coordinates. More...

virtual void	getPosition (const TrackVector &vec, double xyz[3]) const
	Get position of track. More...

virtual void	getMomentum (const TrackVector &vec, double mom[3], TrackDirection dir=UNKNOWN) const
	Get momentum vector of track. More...

virtual bool	isParallel (const Surface &surf) const
	Test whether two surfaces are parallel, within tolerance. More...

virtual double	distanceTo (const Surface &surf) const
	Find perpendicular forward distance to a parallel surface. More...

virtual bool	isEqual (const Surface &surf) const
	Test two surfaces for equality, within tolerance. More...

virtual std::ostream &	Print (std::ostream &out) const
	Printout. More...

Public Member Functions inherited from trkf::SurfPlane
	SurfPlane ()
	Default constructor. More...

virtual	~SurfPlane ()
	Destructor. More...

double	PointingError (const TrackVector &vec, const TrackError &err) const
	Get pointing error of track. More...

void	getStartingError (TrackError &err) const
	Get starting error matrix for Kalman filter. More...

Public Member Functions inherited from trkf::Surface
	Surface ()
	Default constructor. More...

virtual	~Surface ()
	Destructor. More...

virtual TrackVector	getDiff (const TrackVector &vec1, const TrackVector &vec2) const
	Calculate difference of two track parameter vectors. More...

virtual TrackDirection	getDirection (const TrackVector &, TrackDirection dir=UNKNOWN) const
	Get direction of track (default UNKNOWN). More...

Private Attributes
double	fX0
	X origin. More...

double	fY0
	Y origin. More...

double	fZ0
	Z origin. More...

double	fPhi
	Rotation angle about x-axis (wire angle). More...

double	fTheta
	Rotation angle about y'-axis (projected Lorentz angle). More...

Static Private Attributes
static double	fPhiTolerance = 1.e-10
	Phi tolerance for parallel. More...

static double	fThetaTolerance = 1.e-10
	Theta tolerance for parallel. More...

static double	fSepTolerance = 1.e-6
	Separation tolerance for equal. More...

Additional Inherited Members
Public Types inherited from trkf::Surface
enum	TrackDirection { FORWARD, BACKWARD, UNKNOWN }
	Track direction enum. More...

Detailed Description

Definition at line 83 of file SurfXYZPlane.h.

Constructor & Destructor Documentation

trkf::SurfXYZPlane::SurfXYZPlane ( )

Default constructor.

Definition at line 25 of file SurfXYZPlane.cxx.

                              :
     fX0(0.),
     fY0(0.),
     fZ0(0.),
     fPhi(0.),
     fTheta(0.)
   {}

trkf::SurfXYZPlane::SurfXYZPlane	(	double	x0,
		double	y0,
		double	z0,
		double	phi,
		double	theta
	)

Initializing constructor (angles).

Initializing constructor.

Arguments:

x0, y0, z0 - Global coordinates of local origin. phi - Rotation angle about x-axis (wire angle). theta - Rotation angle about y'-axis (projected Lorentz angle).

Definition at line 41 of file SurfXYZPlane.cxx.

                                                                                       :
     fX0(x0),
     fY0(y0),
     fZ0(z0),
     fPhi(phi),
     fTheta(theta)
   {}

trkf::SurfXYZPlane::SurfXYZPlane	(	double	x0,
		double	y0,
		double	z0,
		double	nx,
		double	ny,
		double	nz
	)

Initializing constructor (normal vector).

Arguments:

x0, y0, z0 - Global coordinates of local origin. nx, ny, nz - Normal vector in global coordinate system.

Definition at line 56 of file SurfXYZPlane.cxx.

                                                               :
     fX0(x0),
     fY0(y0),
     fZ0(z0),
     fPhi(0.),
     fTheta(0.)
   {
     // Calculate angles.
 
     double nyz = std::hypot(ny, nz);
     fTheta = atan2(nx, nyz);
     fPhi = 0.;
     if(nyz != 0.)
       fPhi = atan2(-ny, nz);
   }

trkf::SurfXYZPlane::~SurfXYZPlane ( )

virtual

Destructor.

Definition at line 74 of file SurfXYZPlane.cxx.

75 {}

Member Function Documentation

Surface * trkf::SurfXYZPlane::clone ( ) const

virtual

Clone method.

Implements trkf::Surface.

Definition at line 78 of file SurfXYZPlane.cxx.

   {
     return new SurfXYZPlane(*this);
   }

double trkf::SurfXYZPlane::distanceTo ( const Surface & surf ) const

virtual

Find perpendicular forward distance to a parallel surface.

Throw an exception if the other surface is not parallel.

Assuming the other surface is parallel, the distance is simply the w-coordinate of the other surface, and is signed.

Arguments:

surf - Other surface.

Returned value: Distance.

Implements trkf::Surface.

Definition at line 253 of file SurfXYZPlane.cxx.

   {
     // Check if the other surface is parallel to this one.
 
     bool parallel = isParallel(surf);
     if(!parallel)
       throw cet::exception("SurfXYZPlane") << "Attempt to find distance to non-parallel surface.\n";
 
     // Find the origin of the other surface in global coordinates,
     // then convert to our local coordinates.
 
     double otheruvw[3] = {0., 0., 0.};
     double xyz[3];
     double myuvw[3];
     surf.toGlobal(otheruvw, xyz);
     toLocal(xyz, myuvw);
 
     // Distance is local w-coordinate of other surface origin.
 
     return myuvw[2];
   }

void trkf::SurfXYZPlane::getMomentum	(	const TrackVector &	vec,
		double	mom[3],
		TrackDirection	dir = `UNKNOWN`
	)		const

virtual

Get momentum vector of track.

Arguments:

vec - Track state vector. mom - Momentum vector in global coordinate system. dir - Track direction.

Implements trkf::Surface.

Definition at line 167 of file SurfXYZPlane.cxx.

   {
 
     // Get momentum.
 
     double invp = std::abs(vec(4));
     double p = 1. / std::max(invp, 1.e-3);   // Capped at 1000. GeV/c.
 
     // Get track slope parameters.
 
     double dudw = vec(2);
     double dvdw = vec(3);
 
     // Calculate dw/ds.
 
     double dwds = 1. / std::sqrt(1. + dudw*dudw + dvdw*dvdw);
     TrackDirection realdir = getDirection(vec, dir);   // Should be same as original direction.
     if(realdir == BACKWARD)
       dwds = -dwds;
     else if(realdir != FORWARD)
       throw cet::exception("SurfXYZPlane") << "Track direction not specified.\n";
 
     // Calculate momentum vector in local coordinate system.
 
     double pu = p * dudw * dwds;
     double pv = p * dvdw * dwds;
     double pw = p * dwds;
 
     // Rotate momentum to global coordinte system.
 
     double sinth = std::sin(fTheta);
     double costh = std::cos(fTheta);
     double sinphi = std::sin(fPhi);
     double cosphi = std::cos(fPhi);
 
     mom[0] = pu*costh + pw*sinth;
     mom[1] = pu*sinth*sinphi + pv*cosphi - pw*costh*sinphi;
     mom[2] = -pu*sinth*cosphi + pv*sinphi + pw*costh*cosphi;
 
     return;
   }

void trkf::SurfXYZPlane::getPosition	(	const TrackVector &	vec,
		double	xyz[3]
	)		const

virtual

Get position of track.

Arguments:

vec - Track state vector. xyz - Position in global coordinate system.

Implements trkf::Surface.

Definition at line 144 of file SurfXYZPlane.cxx.

   {
     // Get position in local coordinate system.
 
     double uvw[3];
     uvw[0] = vec(0);
     uvw[1] = vec(1);
     uvw[2] = 0.;
 
     // Transform to global coordinate system.
 
     toGlobal(uvw, xyz);
     return;
   }

bool trkf::SurfXYZPlane::isEqual ( const Surface & surf ) const

virtual

Test two surfaces for equality, within tolerance.

Test two surfaces for equality, within tolerance. Here equal is defined as parallel and having zero separation, within tolerance. Note that this definition of equality allows the two surfaces to have different origins.

Arguments:

surf - Other surface.

Returned values: true if equal.

Implements trkf::Surface.

Definition at line 286 of file SurfXYZPlane.cxx.

   {
     bool result = false;
 
     // Test if the other surface is parallel.
 
     bool parallel = isParallel(surf);
     if(parallel) {
       double dist = distanceTo(surf);
       if(std::abs(dist) <= fSepTolerance)
         result = true;
     }
 
     return result;
   }

bool trkf::SurfXYZPlane::isParallel ( const Surface & surf ) const

virtual

Test whether two surfaces are parallel, within tolerance.

Test whether two surfaces are parallel, within tolerance. This method will only return true if the other surface is a SurfXYZPlane.

Arguments:

surf - Other surface.

Returned value: true if parallel.

Implements trkf::Surface.

Definition at line 220 of file SurfXYZPlane.cxx.

   {
     bool result = false;
 
     // Test if the other surface is a SurfXYZPlane.
 
     const SurfXYZPlane* psurf = dynamic_cast<const SurfXYZPlane*>(&surf);
     if(psurf != 0) {
 
       // Test whether surface angle parameters are the same
       // with tolerance.
 
       double delta_phi = TVector2::Phi_mpi_pi(fPhi - psurf->phi());
       double delta_theta = fTheta - psurf->theta();
       if(std::abs(delta_phi) <= fPhiTolerance && std::abs(delta_theta) <= fThetaTolerance)
         result = true;
     }
     return result;
   }

bool trkf::SurfXYZPlane::isTrackValid ( const TrackVector & vec ) const

virtual

Surface-specific tests of validity of track parameters.

Implements trkf::Surface.

Definition at line 84 of file SurfXYZPlane.cxx.

   {
     return true;
   }

double trkf::SurfXYZPlane::phi ( ) const

inline

Rot. angle about x-axis (wire angle).

Definition at line 104 of file SurfXYZPlane.h.

std::ostream & trkf::SurfXYZPlane::Print ( std::ostream & out ) const

virtual

Printout.

Implements trkf::Surface.

Definition at line 303 of file SurfXYZPlane.cxx.

   {
     out << "SurfXYZPlane{ x0=" << fX0 << ", y0=" << fY0 << ", z0=" << fZ0
         << ", phi=" << fPhi << ", theta=" << fTheta << "}";
     return out;
   }

double trkf::SurfXYZPlane::theta ( ) const

inline

Rot. angle about y'-axis (projected Lorentz angle).

Definition at line 105 of file SurfXYZPlane.h.

void trkf::SurfXYZPlane::toGlobal	(	const double	uvw[3],
		double	xyz[3]
	)		const

virtual

Transform local to global coordinates.

Arguments:

uvw - Cartesian coordinates in local coordinate system. xyz - Cartesian coordinates in global coordinate system.

Implements trkf::Surface.

Definition at line 120 of file SurfXYZPlane.cxx.

   {
     double sinth = std::sin(fTheta);
     double costh = std::cos(fTheta);
     double sinphi = std::sin(fPhi);
     double cosphi = std::cos(fPhi);
 
     // x = x0 + u*cos(theta)                       + w*sin(theta)
     xyz[0] = fX0 + uvw[0]*costh + uvw[2]*sinth;
 
     // y = y0 + u*sin(theta)*sin(phi) + v*cos(phi) - w*cos(theta)*sin(phi)
     xyz[1] = fY0 + uvw[0]*sinth*sinphi + uvw[1]*cosphi - uvw[2]*costh*sinphi;
 
     // z = z0 - u*sin(theta)*cos(phi) + v*sin(phi) + w*cos(theta)*cos(phi)
     xyz[2] = fZ0 - uvw[0]*sinth*cosphi + uvw[1]*sinphi + uvw[2]*costh*cosphi;
   }

void trkf::SurfXYZPlane::toLocal	(	const double	xyz[3],
		double	uvw[3]
	)		const

virtual

Transform global to local coordinates.

Arguments:

xyz - Cartesian coordinates in global coordinate system. uvw - Cartesian coordinates in local coordinate system.

Implements trkf::Surface.

Definition at line 96 of file SurfXYZPlane.cxx.

   {
     double sinth = std::sin(fTheta);
     double costh = std::cos(fTheta);
     double sinphi = std::sin(fPhi);
     double cosphi = std::cos(fPhi);
 
     // u = (x-x0)*cos(theta) + (y-y0)*sin(theta)*sin(phi) - (z-z0)*sin(theta)*cos(phi)
     uvw[0] = (xyz[0]-fX0)*costh + (xyz[1]-fY0)*sinth*sinphi - (xyz[2]-fZ0)*sinth*cosphi;
 
     // v =                     (y-y0)*cos(phi)            + (z-z0)*sin(phi)
     uvw[1] = (xyz[1]-fY0)*cosphi + (xyz[2]-fZ0)*sinphi;
 
     // w = (x-x0)*sin(theta) - (y-y0)*cos(theta)*sin(phi) + (z-z0)*cos(theta)*cos(phi)
     uvw[2] = (xyz[0]-fX0)*sinth - (xyz[1]-fY0)*costh*sinphi + (xyz[2]-fZ0)*costh*cosphi;
   }

double trkf::SurfXYZPlane::x0 ( ) const

inline

X origin.

Definition at line 101 of file SurfXYZPlane.h.

double trkf::SurfXYZPlane::y0 ( ) const

inline

Y origin.

Definition at line 102 of file SurfXYZPlane.h.

double trkf::SurfXYZPlane::z0 ( ) const

inline

Z origin.

Definition at line 103 of file SurfXYZPlane.h.

Member Data Documentation

double trkf::SurfXYZPlane::fPhi

private

Rotation angle about x-axis (wire angle).

Definition at line 151 of file SurfXYZPlane.h.

double trkf::SurfXYZPlane::fPhiTolerance = 1.e-10

staticprivate

Phi tolerance for parallel.

Definition at line 142 of file SurfXYZPlane.h.

double trkf::SurfXYZPlane::fSepTolerance = 1.e-6

staticprivate

Separation tolerance for equal.

Definition at line 144 of file SurfXYZPlane.h.

double trkf::SurfXYZPlane::fTheta

private

Rotation angle about y'-axis (projected Lorentz angle).

Definition at line 152 of file SurfXYZPlane.h.

double trkf::SurfXYZPlane::fThetaTolerance = 1.e-10

staticprivate

Theta tolerance for parallel.

Definition at line 143 of file SurfXYZPlane.h.

double trkf::SurfXYZPlane::fX0

private

X origin.

Definition at line 148 of file SurfXYZPlane.h.

double trkf::SurfXYZPlane::fY0

private

Y origin.

Definition at line 149 of file SurfXYZPlane.h.

double trkf::SurfXYZPlane::fZ0

private

Z origin.

Definition at line 150 of file SurfXYZPlane.h.

The documentation for this class was generated from the following files:

Public Member Functions

Private Attributes

Static Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation