mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-14 08:01:49 -05:00
59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
/* Boost check_gmp.cpp test file
|
|
|
|
Copyright 2010-2011 Karsten Ahnert
|
|
Copyright 2011 Mario Mulansky
|
|
|
|
This file tests the odeint library with the gmp arbitrary precision types
|
|
|
|
Distributed under the Boost Software License, Version 1.0.
|
|
(See accompanying file LICENSE_1_0.txt or
|
|
copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
*/
|
|
|
|
#define BOOST_TEST_MODULE odeint_gsl
|
|
|
|
#include <gsl/gsl_vector.h>
|
|
#include <boost/numeric/odeint/stepper/euler.hpp>
|
|
#include <boost/numeric/odeint/external/gsl/gsl_wrapper.hpp>
|
|
|
|
#include <boost/test/unit_test.hpp>
|
|
|
|
using namespace boost::unit_test;
|
|
using namespace boost::numeric::odeint;
|
|
|
|
typedef gsl_vector *state_type;
|
|
|
|
const double sigma = 10.0;
|
|
const double R = 28.0;
|
|
const double b = 8.0 / 3.0;
|
|
|
|
void lorenz( const state_type x , state_type dxdt , double t )
|
|
{
|
|
gsl_vector_set( dxdt , 0 , sigma * ( gsl_vector_get(x , 1 ) - gsl_vector_get( x , 0 ) ) );
|
|
gsl_vector_set( dxdt , 1 , R * gsl_vector_get( x , 0 ) - gsl_vector_get( x , 1 ) - gsl_vector_get( x , 0 ) * gsl_vector_get( x , 2) );
|
|
gsl_vector_set( dxdt , 2 , gsl_vector_get( x , 0 ) * gsl_vector_get( x , 1 ) - b * gsl_vector_get( x , 2) );
|
|
}
|
|
|
|
BOOST_AUTO_TEST_CASE( gsl )
|
|
{
|
|
euler< state_type > euler;
|
|
|
|
state_type x = gsl_vector_alloc( 3 );
|
|
|
|
// check resizing
|
|
state_type y = 0;
|
|
boost::numeric::odeint::resize( y , x );
|
|
BOOST_CHECK( 0 != y );
|
|
|
|
gsl_vector_set( x , 0 , 1.0);
|
|
gsl_vector_set( x , 1 , 1.0);
|
|
gsl_vector_set( x , 2 , 2.0);
|
|
|
|
euler.do_step( lorenz , x , 0.0 , 0.1 );
|
|
|
|
//cout << gsl_vector_get( x , 0 ) << " " << gsl_vector_get( x , 1 ) << " " << gsl_vector_get( x , 2 ) << endl;
|
|
|
|
gsl_vector_free( x );
|
|
|
|
}
|