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95 lines
2.3 KiB
C++
95 lines
2.3 KiB
C++
/*
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[auto_generated]
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libs/numeric/odeint/test_external/eigen/runge_kutta4.cpp
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[begin_description]
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tba.
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[end_description]
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Copyright 2013 Karsten Ahnert
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Copyright 2013 Mario Mulansky
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or
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copy at http://www.boost.org/LICENSE_1_0.txt)
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*/
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#include <boost/config.hpp>
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#ifdef BOOST_MSVC
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#pragma warning(disable:4996)
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#endif
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#define BOOST_TEST_MODULE odeint_eigen_runge_kutta4
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#include <boost/test/unit_test.hpp>
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#include <boost/numeric/odeint/algebra/vector_space_algebra.hpp>
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#include <boost/numeric/odeint/stepper/runge_kutta4.hpp>
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#include <boost/numeric/odeint/external/eigen/eigen_resize.hpp>
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using namespace boost::unit_test;
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using namespace boost::numeric::odeint;
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struct sys
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{
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template< class State , class Deriv >
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void operator()( const State &x , Deriv &dxdt , double t ) const
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{
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dxdt[0] = 1.0;
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}
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};
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BOOST_AUTO_TEST_SUITE( eigen_runge_kutta4 )
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BOOST_AUTO_TEST_CASE( compile_time_matrix )
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{
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typedef Eigen::Matrix< double , 1 , 1 > state_type;
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state_type x;
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x[0] = 10.0;
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runge_kutta4< state_type , double , state_type , double , vector_space_algebra > rk4;
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rk4.do_step( sys() , x , 0.0 , 0.1 );
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BOOST_CHECK_CLOSE( x[0] , 10.1 , 1.0e-13 );
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}
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BOOST_AUTO_TEST_CASE( runtime_matrix )
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{
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typedef Eigen::Matrix< double , Eigen::Dynamic , 1 > state_type;
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state_type x( 1 );
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x[0] = 10.0;
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runge_kutta4< state_type , double , state_type , double , vector_space_algebra > rk4;
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rk4.do_step( sys() , x , 0.0 , 0.1 );
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BOOST_CHECK_CLOSE( x[0] , 10.1 , 1.0e-13 );
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}
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BOOST_AUTO_TEST_CASE( compile_time_array )
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{
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typedef Eigen::Array< double , 1 , 1 > state_type;
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state_type x;
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x[0] = 10.0;
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runge_kutta4< state_type , double , state_type , double , vector_space_algebra > rk4;
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rk4.do_step( sys() , x , 0.0 , 0.1 );
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BOOST_CHECK_CLOSE( x[0] , 10.1 , 1.0e-13 );
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}
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BOOST_AUTO_TEST_CASE( runtime_array )
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{
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typedef Eigen::Array< double , Eigen::Dynamic , 1 > state_type;
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state_type x( 1 );
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x[0] = 10.0;
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runge_kutta4< state_type , double , state_type , double , vector_space_algebra > rk4;
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rk4.do_step( sys() , x , 0.0 , 0.1 );
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BOOST_CHECK_CLOSE( x[0] , 10.1 , 1.0e-13 );
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}
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BOOST_AUTO_TEST_SUITE_END()
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