Acts/Propagator/StepperOptions.hpp

0001 // This file is part of the Acts project.
0002 //
0003 // Copyright (C) 2024 CERN for the benefit of the Acts project
0004 //
0005 // This Source Code Form is subject to the terms of the Mozilla Public
0006 // License, v. 2.0. If a copy of the MPL was not distributed with this
0007 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
0008
0009 #pragma once
0010
0011 #include <limits>
0012
0013 namespace Acts {
0014
0015 struct StepperPlainOptions {
0016   /// Tolerance for the error of the integration
0017   double stepTolerance = 1e-4;
0018
0019   /// Cut-off value for the step size
0020   double stepSizeCutOff = 0.;
0021
0022   /// Absolute maximum step size
0023   double maxStepSize = std::numeric_limits<double>::max();
0024
0025   /// Maximum number of Runge-Kutta steps for the stepper step call
0026   unsigned int maxRungeKuttaStepTrials = 10000;
0027
0028   struct Dense {
0029     /// Toggle between mean and mode evaluation of energy loss
0030     bool meanEnergyLoss = true;
0031
0032     /// Boolean flag for inclusion of d(dEds)d(q/p) into energy loss
0033     bool includeGradient = true;
0034
0035     /// Cut-off value for the momentum in SI units
0036     double momentumCutOff = 0.;
0037   } dense;
0038 };
0039
0040 }  // namespace Acts