VertexingOptions.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2019-2023 CERN for the benefit of the Acts project
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#pragma once

// Workaround for building on clang+libstdc++
#include "Acts/Utilities/detail/ReferenceWrapperAnyCompat.hpp"

#include "Acts/Geometry/GeometryContext.hpp"
#include "Acts/MagneticField/MagneticFieldContext.hpp"
#include "Acts/Vertexing/Vertex.hpp"

namespace Acts {

template <typename input_track_t>
struct VertexingOptions {
  VertexingOptions() = delete;

  VertexingOptions(const GeometryContext& gctx,
                   const MagneticFieldContext& mctx,
                   const Vertex<input_track_t>& constr,
                   const bool useConstr = true)
      : geoContext(gctx),
        magFieldContext(mctx),
        constraint(constr),
        useConstraintInFit(useConstr) {
    if (useConstraintInFit && constraint.covariance().determinant() == 0.) {
      throw std::invalid_argument(
          "Vertex constraint covariance matrix must be invertible.");
    }
  }

  VertexingOptions(const GeometryContext& gctx,
                   const MagneticFieldContext& mctx)
      : geoContext(gctx), magFieldContext(mctx) {
    constraint = Vertex<input_track_t>();
    useConstraintInFit = false;
  }

  std::reference_wrapper<const GeometryContext> geoContext;
  std::reference_wrapper<const MagneticFieldContext> magFieldContext;
  Vertex<input_track_t> constraint;
  bool useConstraintInFit;
};

}  // namespace Acts