Move source files and headers to separate directories.

* extent-sampling.h, gaussian-nd-random.h, nd-random.h, oracles.h,
utils.h: Move into include directory.
* extent-sampling.c, gaussian-nd-random.c, nd-random.c, oracles.c,
utils.c: Move into src directory.
* CMakeLists.txt: Set include as include directory. Look for source
files inside src directory.

5 files changed, 138 insertions, 0 deletions

diff --git a/include/extent-sampling.h b/include/extent-sampling.h
new file mode 100644
index 0000000..8ed3fb2
--- /dev/null
+++ b/include/extent-sampling.h
@@ -0,0 +1,39 @@
+#ifndef EXTENT_SAMPLING_H
+#define EXTENT_SAMPLING_H
+
+#include <gsl/gsl_rng.h>
+#include <gsl/gsl_rstat.h>
+#include <gsl/gsl_vector.h>
+
+typedef double (*extent_oracle_t) (const gsl_vector*);
+typedef double (*integrand_t) (double, const gsl_vector*);
+
+void init_random (void);
+
+double volume
+(extent_oracle_t extent_oracle, double true_volume,
+ const gsl_rng* r, unsigned int dimension, double rtol,
+ gsl_rstat_workspace* stats);
+
+double volume_window
+(extent_oracle_t extent_oracle, double true_volume,
+ const gsl_rng* r, unsigned int dimension, double rtol,
+ unsigned int* number_of_samples);
+
+double integral
+(integrand_t integrand, extent_oracle_t extent_oracle, double true_integral,
+ const gsl_rng* r, unsigned int dimension, double rtol,
+ gsl_rstat_workspace* stats);
+
+double volume_cone
+(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_experiment
+(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
diff --git a/include/gaussian-nd-random.h b/include/gaussian-nd-random.h
new file mode 100644
index 0000000..951cb10
--- /dev/null
+++ b/include/gaussian-nd-random.h
@@ -0,0 +1,19 @@
+#ifndef GAUSSIAN_ND_RANDOM_H
+#define GAUSSIAN_ND_RANDOM_H
+
+#include <gsl/gsl_rng.h>
+#include <gsl/gsl_vector.h>
+#include <gsl/gsl_integration.h>
+
+double planar_angle_to_standard_deviation
+(double mean, double theta_max, double truncation, unsigned int dimension);
+
+unsigned int shifted_gaussian_random_vector
+(const gsl_rng* r, const gsl_vector* mean,
+ double theta_max, double truncation, gsl_vector* x);
+
+double shifted_gaussian_pdf
+(double theta, double mean, double theta_max,
+ double truncation, unsigned int dimension, gsl_integration_workspace* w);
+
+#endif
diff --git a/include/nd-random.h b/include/nd-random.h
new file mode 100644
index 0000000..9637a0e
--- /dev/null
+++ b/include/nd-random.h
@@ -0,0 +1,15 @@
+#ifndef ND_RANDOM_H
+#define ND_RANDOM_H
+
+#include <gsl/gsl_integration.h>
+#include <gsl/gsl_rng.h>
+#include <gsl/gsl_vector.h>
+
+void random_direction_vector (const gsl_rng* r, gsl_vector* x);
+void hollow_cone_random_vector (const gsl_rng* r, const gsl_vector* mean, double theta_min, double theta_max, gsl_vector* x);
+void subsampling_random_vector (const gsl_rng* r, const gsl_vector* mean, double theta_max, gsl_vector* x);
+
+double planar_angle_to_solid_angle (double planar_angle, unsigned int dimension);
+double solid_angle_to_planar_angle (double solid_angle, unsigned int dimension);
+
+#endif
diff --git a/include/oracles.h b/include/oracles.h
new file mode 100644
index 0000000..a661c94
--- /dev/null
+++ b/include/oracles.h
@@ -0,0 +1,37 @@
+#ifndef ORACLES_H
+#define ORACLES_H
+
+#include <gsl/gsl_blas.h>
+#include <gsl/gsl_rng.h>
+
+double bernoulli_extent_generator (const gsl_rng* r, double p, double r0, double r1);
+double bernoulli_true_volume (double p, double r0, double r1, unsigned int dimension);
+
+double uniform_extent_generator (const gsl_rng* r, double a, double b);
+double uniform_true_volume (double a, double b, unsigned int dimension);
+
+double beta_extent_generator (const gsl_rng* r, double alpha, double beta);
+double beta_true_volume (double alpha, double beta, unsigned int dimension);
+
+double symmetric_spiral_extent_oracle (const gsl_vector* x);
+
+double right_triangle_extent_oracle (const gsl_vector* x, double base, double height);
+double right_triangle_true_volume (double base, double height);
+
+double sphere_extent_oracle (const gsl_vector* x, double radius);
+double sphere_maximum_extent (double radius);
+
+double plane_extent_oracle (const gsl_vector* x, double displacement);
+
+double cube_extent_oracle (const gsl_vector* x, double edge);
+double cube_extent_oracle_with_center (const gsl_vector* x, const gsl_vector* center, double edge);
+double cube_true_volume (double edge, unsigned int dimension);
+double cube_maximum_extent (double edge, unsigned int dimension);
+
+double ellipsoid_extent_oracle (const gsl_vector* x, const gsl_vector* axes);
+double ellipsoid_true_volume (const gsl_vector* axes);
+
+double spheroid_extent_oracle (const gsl_vector* x, double eccentricity);
+double spheroid_true_volume (double eccentricity, unsigned int dimension);
+
+#endif
diff --git a/include/utils.h b/include/utils.h
new file mode 100644
index 0000000..220320e
--- /dev/null
+++ b/include/utils.h
@@ -0,0 +1,28 @@
+#ifndef UTILS_H
+#define UTILS_H
+
+#include <gsl/gsl_roots.h>
+#include <gsl/gsl_vector.h>
+
+#define SIGNUM(x) ((x) < 0 ? -1 : 1)
+
+double volume_of_ball (unsigned int dimension);
+double ln_volume_of_ball (unsigned int dimension);
+double surface_area_of_ball (unsigned int dimension);
+double ln_surface_area_of_ball (unsigned int dimension);
+double lower_incomplete_gamma (double s, double x);
+
+double angle_between_vectors (const gsl_vector* x, const gsl_vector* y);
+double dot_product (const gsl_vector* x, const gsl_vector* y);
+double gaussian_pdf (double x);
+double gaussian_cdf (double x);
+
+double rerror (double approx, double exact);
+
+double gprate (double start, double last, unsigned int n);
+double gpterm (double a, double r, int n);
+
+double bisection (gsl_function* f, double a, double b);
+double bisection_rlimit (gsl_function* f, double a, double b);
+
+#endif