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/*
igraph library.
Copyright (C) 2025 The igraph development team <igraph@igraph.org>
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef IGRAPH_SPATIAL_H
#define IGRAPH_SPATIAL_H
#include "igraph_datatype.h"
#include "igraph_decls.h"
#include "igraph_types.h"
#include "igraph_error.h"
#include "igraph_matrix.h"
IGRAPH_BEGIN_C_DECLS
IGRAPH_EXPERIMENTAL IGRAPH_EXPORT igraph_error_t igraph_delaunay_graph(
igraph_t *graph,
const igraph_matrix_t *points);
IGRAPH_EXPERIMENTAL IGRAPH_EXPORT igraph_error_t igraph_lune_beta_skeleton(
igraph_t *graph,
const igraph_matrix_t *points,
igraph_real_t beta);
IGRAPH_EXPERIMENTAL IGRAPH_EXPORT igraph_error_t igraph_circle_beta_skeleton(
igraph_t *graph,
const igraph_matrix_t *points,
igraph_real_t beta);
IGRAPH_EXPERIMENTAL IGRAPH_EXPORT igraph_error_t igraph_beta_weighted_gabriel_graph(
igraph_t *graph,
igraph_vector_t *weights,
const igraph_matrix_t *points,
igraph_real_t max_beta);
IGRAPH_EXPERIMENTAL IGRAPH_EXPORT igraph_error_t igraph_gabriel_graph(
igraph_t *graph, const igraph_matrix_t *points);
IGRAPH_EXPERIMENTAL IGRAPH_EXPORT igraph_error_t igraph_relative_neighborhood_graph(
igraph_t *graph, const igraph_matrix_t *points);
/**
* \typedef igraph_metric_t
* \brief Metric functions for use with spatial computation.
*
* \enumval IGRAPH_METRIC_EUCLIDEAN The Euclidean distance, i.e. L2 metric.
* \enumval IGRAPH_METRIC_MANHATTAN The Manhattan distance, i.e. L1 metric.
*/
typedef enum {
IGRAPH_METRIC_EUCLIDEAN = 0,
IGRAPH_METRIC_L2 = IGRAPH_METRIC_EUCLIDEAN,
IGRAPH_METRIC_MANHATTAN = 1,
IGRAPH_METRIC_L1 = IGRAPH_METRIC_MANHATTAN
} igraph_metric_t;
IGRAPH_EXPERIMENTAL IGRAPH_EXPORT igraph_error_t igraph_nearest_neighbor_graph(
igraph_t *graph,
const igraph_matrix_t *points,
igraph_metric_t metric,
igraph_int_t neighbors,
igraph_real_t cutoff,
igraph_bool_t directed);
IGRAPH_EXPERIMENTAL IGRAPH_EXPORT igraph_error_t igraph_spatial_edge_lengths(
const igraph_t *graph,
igraph_vector_t *lengths,
const igraph_matrix_t *points,
igraph_metric_t metric);
IGRAPH_EXPORT igraph_error_t igraph_convex_hull_2d(
const igraph_matrix_t *data,
igraph_vector_int_t *resverts,
igraph_matrix_t *rescoords);
IGRAPH_END_C_DECLS
#endif
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