advection.h

#include <TNL/tnlConfig.h>
#include <TNL/Solvers/Solver.h>
#include <TNL/Solvers/BuildConfigTags.h>
#include <TNL/Operators/DirichletBoundaryConditions.h>
#include <TNL/Operators/NeumannBoundaryConditions.h>
#include <TNL/Functions/Analytic/Constant.h>
#include <TNL/Functions/VectorField.h>
#include <TNL/Meshes/Grid.h>
#include "advectionProblem.h"
#include "LaxFridrichs.h"
#include "advectionRhs.h"
#include "advectionBuildConfigTag.h"

using namespace TNL;

typedef advectionBuildConfigTag BuildConfig;

/****
 * Uncoment the following (and comment the previous line) for the complete build.
 * This will include support for all floating point precisions, all indexing types
 * and more solvers. You may then choose between them from the command line.
 * The compile time may, however, take tens of minutes or even several hours,
 * esppecially if CUDA is enabled. Use this, if you want, only for the final build,
 * not in the development phase.
 */
//typedef tnlDefaultConfigTag BuildConfig;

template< typename ConfigTag >class advectionConfig
{
   public:
      static void configSetup( Config::ConfigDescription& config )
      {
         config.addDelimiter( "Advection settings:" );
         config.addEntry< String >( "velocity-field", "Type of velocity field.", "constant" );
            config.addEntryEnum< String >( "constant" );
            //config.addEntryEnum< String >( "file" );
         Functions::VectorField< 3, Functions::Analytic::Constant< 3 > >::configSetup( config, "velocity-field-" );
         
         typedef Meshes::Grid< 3 > MeshType;
         LaxFridrichs< MeshType >::configSetup( config, "lax-fridrichs" );
         
         config.addEntry< String >( "boundary-conditions-type", "Choose the boundary conditions type.", "dirichlet");
            config.addEntryEnum< String >( "dirichlet" );
            config.addEntryEnum< String >( "neumann" );
         config.addEntry< double >( "boundary-conditions-constant", "This sets a value in case of the constant boundary conditions." );
      }
};

template< typename Real,
          typename Device,
          typename Index,
          typename MeshType,
          typename ConfigTag,
          typename SolverStarter >
class advectionSetter
{
   public:

      typedef Real RealType;
      typedef Device DeviceType;
      typedef Index IndexType;

      static bool run( const Config::ParameterContainer & parameters )
      {
          static const int Dimensions = MeshType::getMeshDimensions();
          typedef Functions::Analytic::Constant< Dimensions, RealType > ConstantFunctionType;
          typedef Functions::VectorField< Dimensions, ConstantFunctionType > VelocityFieldType;
          typedef LaxFridrichs< MeshType, Real, Index, VelocityFieldType > ApproximateOperator;
          typedef advectionRhs< MeshType, Real > RightHandSide;
          typedef Containers::StaticVector < MeshType::getMeshDimensions(), Real > Vertex;

         /****
          * Resolve the template arguments of your solver here.
          * The following code is for the Dirichlet and the Neumann boundary conditions.
          * Both can be constant or defined as descrete values of Vector.
          */
          String boundaryConditionsType = parameters.getParameter< String >( "boundary-conditions-type" );
          if( parameters.checkParameter( "boundary-conditions-constant" ) )
          {
             typedef Functions::Analytic::Constant< Dimensions, Real > Constant;
             if( boundaryConditionsType == "dirichlet" )
             {
                typedef Operators::DirichletBoundaryConditions< MeshType, Constant, MeshType::getMeshDimensions(), Real, Index > BoundaryConditions;
                typedef advectionProblem< MeshType, BoundaryConditions, RightHandSide, ApproximateOperator > Problem;
                SolverStarter solverStarter;
                return solverStarter.template run< Problem >( parameters );
             }
             typedef Operators::NeumannBoundaryConditions< MeshType, Constant, Real, Index > BoundaryConditions;
             typedef advectionProblem< MeshType, BoundaryConditions, RightHandSide, ApproximateOperator > Problem;
             SolverStarter solverStarter;
             return solverStarter.template run< Problem >( parameters );
          }
          typedef Functions::MeshFunction< MeshType > MeshFunction;
          if( boundaryConditionsType == "dirichlet" )
          {
             typedef Operators::DirichletBoundaryConditions< MeshType, MeshFunction, MeshType::getMeshDimensions(), Real, Index > BoundaryConditions;
             typedef advectionProblem< MeshType, BoundaryConditions, RightHandSide, ApproximateOperator > Problem;
             SolverStarter solverStarter;
             return solverStarter.template run< Problem >( parameters );
          }
          typedef Operators::NeumannBoundaryConditions< MeshType, MeshFunction, Real, Index > BoundaryConditions;
          typedef advectionProblem< MeshType, BoundaryConditions, RightHandSide, ApproximateOperator > Problem;
          SolverStarter solverStarter;
          return solverStarter.template run< Problem >( parameters );
      }

};

int main( int argc, char* argv[] )
{
   Solvers::Solver< advectionSetter, advectionConfig, BuildConfig > solver;
   if( ! solver. run( argc, argv ) )
      return EXIT_FAILURE;
   return EXIT_SUCCESS;
}