17#ifndef ROOT_Math_GenVector_eta
18#define ROOT_Math_GenVector_eta 1
47 template<
typename Scalar>
59 return log(z_scaled +
std::sqrt(z_scaled * z_scaled + 1.0));
63 return z > 0 ?
log(2.0 * z_scaled + 0.5 / z_scaled) : -
log(-2.0 * z_scaled);
71 return z + etaMax<Scalar>();
74 return z - etaMax<Scalar>();
84 template<
typename Scalar>
87 if (tanThetaOver2 == 0) {
88 return r + etaMax<Scalar>();
90 else if (tanThetaOver2 > std::numeric_limits<Scalar>::max()) {
91 return -
r - etaMax<Scalar>();
95 return -
log(tanThetaOver2);
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t r
RVec< PromoteType< T > > tan(const RVec< T > &v)
RVec< PromoteTypes< T0, T1 > > pow(const T0 &x, const RVec< T1 > &v)
RVec< PromoteType< T > > log(const RVec< T > &v)
Namespace for new Math classes and functions.
Scalar Eta_FromTheta(Scalar theta, Scalar r)
Implementation of eta from -log(tan(theta/2)).
Scalar Eta_FromRhoZ(Scalar rho, Scalar z)
Calculate eta given rho and zeta.
VecExpr< UnaryOp< Sqrt< T >, VecExpr< A, T, D >, T >, T, D > sqrt(const VecExpr< A, T, D > &rhs)
VecExpr< UnaryOp< Fabs< T >, VecExpr< A, T, D >, T >, T, D > fabs(const VecExpr< A, T, D > &rhs)
This file contains a specialised ROOT message handler to test for diagnostic in unit tests.