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75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
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/*
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[auto_generated]
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libs/numeric/odeint/test/integrators_symplectic.cpp
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[begin_description]
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tba.
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[end_description]
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Copyright 2009-2013 Karsten Ahnert
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Copyright 2009-2013 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_iterators_symplectic
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#define BOOST_FUSION_INVOKE_MAX_ARITY 15
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#define BOOST_RESULT_OF_NUM_ARGS 15
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#define FUSION_MAX_VECTOR_SIZE 15
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#include <cmath>
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#include <boost/test/unit_test.hpp>
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#ifndef ODEINT_INTEGRATE_ITERATOR
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#include <boost/numeric/odeint/integrate/integrate_const.hpp>
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#else
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#include <boost/numeric/odeint/iterator/integrate/integrate_const.hpp>
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#endif
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#include <boost/numeric/odeint/stepper/symplectic_euler.hpp>
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#include <boost/numeric/odeint/stepper/symplectic_rkn_sb3a_mclachlan.hpp>
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#include <boost/numeric/odeint/stepper/symplectic_rkn_sb3a_m4_mclachlan.hpp>
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using namespace boost::unit_test;
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using namespace boost::numeric::odeint;
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namespace mpl = boost::mpl;
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namespace fusion = boost::fusion;
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typedef std::vector<double> container_type;
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struct harm_osc {
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void operator()( const container_type &q , container_type &dpdt )
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{
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dpdt[0] = -q[0];
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}
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};
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class complete_steppers : public mpl::vector<
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symplectic_euler< container_type >
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, symplectic_rkn_sb3a_mclachlan< container_type >
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, symplectic_rkn_sb3a_m4_mclachlan< container_type >
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> {};
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BOOST_AUTO_TEST_SUITE( symplectic_steppers_test )
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BOOST_AUTO_TEST_CASE_TEMPLATE( test_integrate_const , Stepper , complete_steppers )
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{
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container_type q( 1 , 1.0 ) , p( 1 , 0.0 );
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size_t steps = integrate_const( Stepper() , harm_osc() ,
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std::make_pair( boost::ref(q) , boost::ref(p) ) ,
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0.0 , 1.0 , 0.1 );
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BOOST_CHECK( steps == 10 );
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BOOST_CHECK_CLOSE( q[0] , std::cos(1.0) , 100*std::pow( 0.1 , Stepper::order_value ) );
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}
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BOOST_AUTO_TEST_SUITE_END()
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