SpECTRE Documentation Coverage Report
Current view: top level - PointwiseFunctions/Hydro - LorentzFactor.hpp Coverage Total Hit
Commit: 0d1d717af84a81fb1284a20c4013708fe85cc2f0 Lines: 50.0 % 10 5
Test Date: 2026-10-22 17:29:42
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            Line data    Source code
       1            0 : // Distributed under the MIT License.
       2              : // See LICENSE.txt for details.
       3              : 
       4              : #pragma once
       5              : 
       6              : #include <cstddef>
       7              : 
       8              : #include "DataStructures/DataBox/Tag.hpp"
       9              : #include "DataStructures/Tensor/TypeAliases.hpp"
      10              : #include "PointwiseFunctions/Hydro/TagsDeclarations.hpp"
      11              : #include "Utilities/TMPL.hpp"
      12              : 
      13              : /// \cond
      14              : namespace gsl {
      15              : template <typename>
      16              : struct not_null;
      17              : }  // namespace gsl
      18              : /// \endcond
      19              : 
      20              : namespace hydro {
      21              : /// @{
      22              : /// Computes the Lorentz factor \f$W=1/\sqrt{1 - v^i v_i}\f$
      23              : template <typename DataType, size_t Dim, typename Frame>
      24            1 : void lorentz_factor(gsl::not_null<Scalar<DataType>*> result,
      25              :                     const tnsr::I<DataType, Dim, Frame>& spatial_velocity,
      26              :                     const tnsr::i<DataType, Dim, Frame>& spatial_velocity_form);
      27              : 
      28              : template <typename DataType, size_t Dim, typename Frame>
      29            1 : Scalar<DataType> lorentz_factor(
      30              :     const tnsr::I<DataType, Dim, Frame>& spatial_velocity,
      31              :     const tnsr::i<DataType, Dim, Frame>& spatial_velocity_form);
      32              : 
      33              : template <typename DataType>
      34            1 : void lorentz_factor(gsl::not_null<Scalar<DataType>*> result,
      35              :                     const Scalar<DataType>& spatial_velocity_squared);
      36              : 
      37              : template <typename DataType>
      38            1 : Scalar<DataType> lorentz_factor(
      39              :     const Scalar<DataType>& spatial_velocity_squared);
      40              : /// @}
      41              : 
      42              : namespace Tags {
      43              : /// Compute item for Lorentz factor \f$W\f$.
      44              : ///
      45              : /// Can be retrieved using `hydro::Tags::LorentzFactor`
      46              : template <typename DataType, size_t Dim, typename Frame>
      47            1 : struct LorentzFactorCompute : LorentzFactor<DataType>, db::ComputeTag {
      48            0 :   using argument_tags =
      49              :       tmpl::list<SpatialVelocity<DataType, Dim, Frame>,
      50              :                  SpatialVelocityOneForm<DataType, Dim, Frame>>;
      51              : 
      52            0 :   using return_type = Scalar<DataType>;
      53              : 
      54            0 :   static constexpr auto function = static_cast<void (*)(
      55              :       gsl::not_null<Scalar<DataType>*>, const tnsr::I<DataType, Dim, Frame>&,
      56              :       const tnsr::i<DataType, Dim, Frame>&)>(
      57              :       &lorentz_factor<DataType, Dim, Frame>);
      58              : 
      59            0 :   using base = LorentzFactor<DataType>;
      60              : };
      61              : }  // namespace Tags
      62              : }  // namespace hydro
        

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