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57 lines
1.8 KiB
Python
57 lines
1.8 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (C) 2014-2021 EDF R&D
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
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#
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"""calcul du carré de la distance entre deux points"""
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import logging
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# -----------------------------------------------------------------------------
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# ---
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def distance2(xyz1, xyz2):
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"""
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carré de la distance entre deux points donnés par des triplets [x,y,z]
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"""
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#logging.info("start")
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dcarre = 0
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for ijk in range(3):
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dcarre += (xyz1[ijk]-xyz2[ijk])*(xyz1[ijk]-xyz2[ijk])
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logging.debug('dcarre=%s', dcarre)
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return dcarre
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## -----------------------------------------------------------------------------
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## --- test unitaire
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#import unittest
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#class Test_distance2(unittest.TestCase):
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#"""test de la fonction"""
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#def setUp(self):
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#self.a=[0, 0, 0]
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#self.b=[3, 4, 5]
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#self.c=[-5,-4,-3]
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#def test_calcul(self):
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#self.assertEqual(distance2(self.a, self.b), distance2(self.b, self.a))
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#self.assertEqual(distance2(self.a, self.b), distance2(self.a, self.c))
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#self.assertEqual(distance2(self.b, self.b), 0)
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#self.assertEqual(distance2(self.a, self.b), 50)
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