/* -*- mode: C -*- */ /* IGraph library. Copyright (C) 2006-2012 Gabor Csardi <csardi.gabor@gmail.com> 334 Harvard street, Cambridge, MA 02139 USA 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, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <igraph.h> int main() { igraph_real_t coords_array[][2] = {{3, 2}, {5, 1}, {4, 4}, {6, 4}, {4, 3}, {2, 5}, {1, 3}, {2, 4}, {6, 3}, {9, 2} }; igraph_matrix_t coords, resmat; igraph_vector_t result; long i; igraph_matrix_init(&coords, 10, 2); for (i=0; i<20; i++) MATRIX(coords, i/2, i%2) = coords_array[i/2][i%2]; /* Testing with index output mode */ igraph_vector_init(&result, 1); if (igraph_convex_hull(&coords, &result, 0)) return 1; for (i=0; i<igraph_vector_size(&result); i++) printf("%ld ", (long)VECTOR(result)[i]); printf("\n"); igraph_vector_destroy(&result); /* Testing with coordinate output mode */ igraph_matrix_init(&resmat, 0, 0); if (igraph_convex_hull(&coords, 0, &resmat)) return 1; for (i=0; i<igraph_matrix_nrow(&resmat); i++) printf("%ld %ld ", (long)MATRIX(resmat, i, 0), (long)MATRIX(resmat, i, 1)); printf("\n"); igraph_matrix_destroy(&resmat); igraph_matrix_destroy(&coords); return 0; }