SpECTRE Documentation Coverage Report
Current view: top level - PointwiseFunctions/Hydro - LorentzFactor.hpp Hit Total Coverage
Commit: 37c384043430860f87787999aa7399d01bb3d213 Lines: 5 10 50.0 %
Date: 2024-04-20 02:24:02
Legend: Lines: hit not hit

          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"  // IWYU pragma: keep
      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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