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Diffstat (limited to 'src/common/include/gudhi/distance_functions.h')
-rw-r--r-- | src/common/include/gudhi/distance_functions.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/common/include/gudhi/distance_functions.h b/src/common/include/gudhi/distance_functions.h new file mode 100644 index 00000000..7a2ab035 --- /dev/null +++ b/src/common/include/gudhi/distance_functions.h @@ -0,0 +1,37 @@ + /* This file is part of the Gudhi Library. The Gudhi library + * (Geometric Understanding in Higher Dimensions) is a generic C++ + * library for computational topology. + * + * Author(s): Clément Maria + * + * Copyright (C) 2014 INRIA Sophia Antipolis-Méditerranée (France) + * + * 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 3 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 <http://www.gnu.org/licenses/>. + */ + +/* Compute the Euclidean distance between two Points given + * by a range of coordinates. The points are assumed to have + * the same dimension. */ +template< typename Point > +double euclidean_distance( Point &p1, Point &p2) +{ + double dist = 0.; + auto it1 = p1.begin(); auto it2 = p2.begin(); + for(; it1 != p1.end(); ++it1, ++it2) + { + double tmp = *it1 - *it2; + dist += tmp*tmp; + } + return sqrt(dist); +} |