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/*
nsmc --- n-sphere Monte Carlo method
Copyright © 2021 Arun I <arunisaac@systemreboot.net>
Copyright © 2021 Murugesan Venkatapathi <murugesh@iisc.ac.in>
This file is part of nsmc.
nsmc is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
nsmc is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with nsmc. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef EXTENT_SAMPLING_H
#define EXTENT_SAMPLING_H
#include <gsl/gsl_rng.h>
#include <gsl/gsl_rstat.h>
#include <gsl/gsl_vector.h>
typedef struct {
double (*oracle) (const gsl_rng*, const gsl_vector*, void*);
void *params;
} extent_oracle_t;
typedef struct {
double (*integrand) (double, const gsl_vector*, void*);
void *params;
} integrand_t;
void init_random (void);
void volume
(const extent_oracle_t *extent_oracle, double true_volume,
const gsl_rng* r, unsigned int dimension, double rtol,
gsl_rstat_workspace* stats);
void integral
(const integrand_t *integrand, const extent_oracle_t *extent_oracle, double true_integral,
const gsl_rng* r, unsigned int dimension, double rtol,
gsl_rstat_workspace* stats);
double volume_cone
(const extent_oracle_t *extent_oracle, const gsl_rng* r,
const gsl_vector* mean, double omega_min, double omega_max,
unsigned int number_of_samples, double* variance);
double volume_importance
(const extent_oracle_t *extent_oracle, const gsl_rng* r,
const gsl_vector* mean, unsigned int samples_per_cone,
double solid_angle_factor, double solid_angle_threshold_exponent_factor,
unsigned int* number_of_samples);
#endif
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