static VALUE rb_gsl_integration_qawo_table_alloc(int argc, VALUE *argv,
VALUE klass)
{
gsl_integration_qawo_table *t = NULL;
double omega, L;
enum gsl_integration_qawo_enum sine;
size_t n;
if (argc != 1 && argc != 4)
rb_raise(rb_eArgError, "wrong nubmer of arguments (%d for 1 or 4)", argc);
if (TYPE(argv[0]) == T_ARRAY) {
omega = NUM2DBL(rb_ary_entry(argv[0], 0));
L = NUM2DBL(rb_ary_entry(argv[0], 1));
sine = FIX2INT(rb_ary_entry(argv[0], 2));
n = FIX2INT(rb_ary_entry(argv[0], 3));
} else {
omega = NUM2DBL(argv[0]);
L = NUM2DBL(argv[1]);
sine = FIX2INT(argv[2]);
n = FIX2INT(argv[3]);
}
t = gsl_integration_qawo_table_alloc(omega, L, sine, n);
return Data_Wrap_Struct(klass, 0, gsl_integration_qawo_table_free, t);
}
static gsl_integration_qawo_table* make_qawo_table(VALUE ary)
{
double omega, L;
enum gsl_integration_qawo_enum sine;
size_t n;
omega = NUM2DBL(rb_ary_entry(ary, 0));
L = NUM2DBL(rb_ary_entry(ary, 1));
sine = FIX2INT(rb_ary_entry(ary, 2));
n = FIX2INT(rb_ary_entry(ary, 3));
return gsl_integration_qawo_table_alloc(omega, L, sine, n);
}
ANACalculatorCoplanarTriple::ANACalculatorCoplanarTriple(
const ANASampleHex * sample, size_t sampling, double epsabs)
{
m_sample = sample;
m_qx = 0.0;
m_qz = 0.0;
m_resol2_x = 0.0;
m_resol2_z = 0.0;
m_scale = 0.0;
m_coefficient = 0.0;
m_frequency = 0.0;
/*initialization of integration staff*/
m_limit = 10000;
m_epsabs = epsabs;
m_function.function = &ana_coplanar_triple_integrand_xz1;
m_function.params = this;
m_qawo_table = gsl_integration_qawo_table_alloc(0.0, 0.0, GSL_INTEG_COSINE,
m_limit);
m_workspace = gsl_integration_workspace_alloc(m_limit);
m_cyclic_workspace = gsl_integration_workspace_alloc(m_limit);
m_a = 0.0;
/*allocate and initialize z-arrays*/
m_sampling = sampling;
m_z1 = new double[m_sampling];
m_integrand_values = new double[m_sampling];
for(size_t i = 0; i < m_sampling - 1; ++i)
{
m_z1[i] = i * m_sample->m_thickness / m_sampling;
m_integrand_values[i] = 0.0;
}
/*at z1 = d, the correlation function is undefined*/
m_z1[m_sampling - 1] = m_sample->m_thickness * 0.999;
/*allocate interpolation staff*/
m_interp = gsl_interp_alloc (gsl_interp_cspline, m_sampling);
m_accel = gsl_interp_accel_alloc ();
gsl_set_error_handler_off ();
}
int main_gsl_quad() {
// Na postawie N i K bede ustalal jak wiele moze byc przedzialów,
// Ustalilem recznie, na wyczucie.
//
int DEEP = (int)( log(2.0E7 / N) );
// printf("%d\n", DEEP);
int DLIMIT = Pow(2,DEEP);
double result1, result2, diff1, diff2;
double result3, result4, diff3, diff4;
F = gsl_vector_alloc((int)N); // Macierz G jest trojdiagonalna symetryczna
G1 = gsl_vector_alloc((int)N); // wiec mozna ja opisac jedynie poprzez 2
G2 = gsl_vector_alloc((int)N-1); // wektory- diagonali i poddiagonali.
X = gsl_vector_alloc((int)N); //
for (int i = 0; i < N; ++i)
gsl_vector_set(G1, i, 2*(i-1.0)/h);
for (int i = 0; i < N-1; ++i)
gsl_vector_set(G2, i, -(2.0*i+1.0)/2.0/h);
workspace = gsl_integration_workspace_alloc(LIMIT);
if ( K > 20 ) {
DLIMIT = (int) log10(sqrt(5*K))*DLIMIT;
DEEP = (int) log2(DLIMIT);
}
DLIMIT *= 4;
DEEP *= 4;
table = gsl_integration_qawo_table_alloc(K*PI, h, GSL_INTEG_SINE, DEEP);
fun.function = &f2q_sin;
// printf("%d %d\n", DEEP, DLIMIT);
// Mamy doczynienia z funkcja oscylujaca, uzyjmy wiec specjalnych
// kwadratur GSLa, oddzielnie dla sinus oddzielnie dla cosinus,
//
for (f2qi = 1; f2qi <= N; ++f2qi) { // sinus
fisign = 1;
if ( f2qi < 2 ) // wartosci na siebie nachodza
gsl_integration_qawo(&fun, (f2qi-1)*h, 0.0E0, EPSILON, DLIMIT, workspace, table, &result1, &diff1);
else result1 = -result3;
fisign = -1;
gsl_integration_qawo(&fun, (f2qi )*h, 0.0E0, EPSILON, DLIMIT, workspace, table, &result3, &diff3);
gsl_vector_set(F, f2qi-1, result1+result3);
// if( f2qi % 1000 == 0 ) { printf("%d \r", f2qi); fflush(stdout); }
}
gsl_integration_qawo_table_free(table);
table = gsl_integration_qawo_table_alloc(K*PI, h, GSL_INTEG_COSINE, DEEP);
fun.function = &f2q_cos;
for (f2qi = 1; f2qi <= N; ++f2qi) { // cosinus
fisign = 1;
if ( f2qi < 2 ) // wartosci na siebie nachodza
gsl_integration_qawo(&fun, (f2qi-1)*h, 0.0E0, EPSILON, DLIMIT, workspace, table, &result2, &diff2);
else result2 = -result4;
fisign = -1;
gsl_integration_qawo(&fun, (f2qi )*h, 0.0E0, EPSILON, DLIMIT, workspace, table, &result4, &diff4);
gsl_vector_set(F, f2qi-1, result1+result3+gsl_vector_get(F, f2qi-1));
// if( f2qi % 1000 == 0 ) { printf("%d \r", f2qi); fflush(stdout); }
}
gsl_integration_qawo_table_free(table);
// Mamy F wiec znajdujemy X (h*), rozwiazujac uklad Gh=F
// gdzie G symetryczna trojdiagonalna,
//
// fprintf(stderr,"2 quad done.\n");
gsl_linalg_solve_symm_tridiag(G1,G2,F,X);
// for (int i = 0; i < N; ++i)
// fprintf(stderr,"h[%d] = %.15e\n",i,gsl_vector_get(X,i));
fprintf(stderr,"2 linalg done.\n");
return 0;
}
gsl_complex integrate_line_segment(Params *params,
gsl_complex p0,
gsl_complex p1)
{
gsl_complex k = gsl_complex_sub(p1, p0);
const double r = params->r;
const double a = 0.0; // parameter interval start
const double b = 1.0; // parameter interval end
const double L = b - a; // length of parameter interval
const size_t table_size = 1000;
// calculate frequency of oscillatory part
double omega = GSL_REAL(k) * r;
gsl_integration_workspace *ws = gsl_integration_workspace_alloc(table_size);
// prepare sine/cosine tables for integration
gsl_integration_qawo_table *table_cos = gsl_integration_qawo_table_alloc(omega, L, GSL_INTEG_COSINE, table_size);
gsl_integration_qawo_table *table_sin = gsl_integration_qawo_table_alloc(omega, L, GSL_INTEG_SINE, table_size);
LineSegmentParams lsp;
lsp.p0 = p0;
lsp.k = k;
lsp.damping = params->r * GSL_IMAG(k);
lsp.params = params;
//fprintf(stderr, "p0 = %g %g, p1 = %g %g, k = %g %g, r = %g, omega = %g, damping = %g\n",
// GSL_REAL(p0), GSL_IMAG(p0), GSL_REAL(p1), GSL_IMAG(p1),
// GSL_REAL(k), GSL_IMAG(k), r, omega, lsp.damping);
gsl_function F;
F.function = &line_segment_integrand_wrapper;
F.params = &lsp;
double result_real_cos, abserr_real_cos;
double result_real_sin, abserr_real_sin;
double result_imag_cos, abserr_imag_cos;
double result_imag_sin, abserr_imag_sin;
double epsabs = 1e-9;
double epsrel = 1e-9;
lsp.part = REAL;
gsl_integration_qawo(&F, a, epsabs, epsrel, table_size, ws, table_cos, &result_real_cos, &abserr_real_cos);
gsl_integration_qawo(&F, a, epsabs, epsrel, table_size, ws, table_sin, &result_real_sin, &abserr_real_sin);
lsp.part = IMAG;
gsl_integration_qawo(&F, a, epsabs, epsrel, table_size, ws, table_cos, &result_imag_cos, &abserr_imag_cos);
gsl_integration_qawo(&F, a, epsabs, epsrel, table_size, ws, table_sin, &result_imag_sin, &abserr_imag_sin);
//fprintf(stderr, " cos: %g (+- %g) %g (+- %g) sin: %g (+- %g) %g (+- %g)\n",
// result_real_cos, abserr_real_cos, result_imag_cos, abserr_imag_cos,
// result_real_sin, abserr_real_sin, result_imag_sin, abserr_imag_sin);
gsl_complex cos_part = gsl_complex_rect(result_real_cos, result_imag_cos);
gsl_complex sin_part = gsl_complex_rect(-result_imag_sin, result_real_sin);
gsl_complex sum = gsl_complex_add(cos_part, sin_part);
gsl_complex result = gsl_complex_mul(
k,
gsl_complex_mul(sum, gsl_complex_exp(gsl_complex_mul_imag(p0, params->r))));
gsl_integration_qawo_table_free(table_sin);
gsl_integration_qawo_table_free(table_cos);
gsl_integration_workspace_free(ws);
return result;
}
