1 # -*- coding: utf-8 -*-
2 # Copyright (C) 2014-2019 CEA/DEN, EDF R&D
4 # This library is free software; you can redistribute it and/or
5 # modify it under the terms of the GNU Lesser General Public
6 # License as published by the Free Software Foundation; either
7 # version 2.1 of the License, or (at your option) any later version.
9 # This library is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 # Lesser General Public License for more details.
14 # You should have received a copy of the GNU Lesser General Public
15 # License along with this library; if not, write to the Free Software
16 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 # See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
22 from .geomsmesh import geompy
24 # -----------------------------------------------------------------------------
25 # --- calcul de produit mixte pour orientation
27 def produitMixte(o, p1, p2, p3):
29 produit mixte de 3 vecteurs a partir d'une origine et 3 points
31 coordo = geompy.PointCoordinates(o)
32 coordp1 = geompy.PointCoordinates(p1)
33 coordp2 = geompy.PointCoordinates(p2)
34 coordp3 = geompy.PointCoordinates(p3)
35 u = [coordp1[0] - coordo[0], coordp1[1] - coordo[1], coordp1[2] - coordo[2]]
36 v = [coordp2[0] - coordo[0], coordp2[1] - coordo[1], coordp2[2] - coordo[2]]
37 w = [coordp3[0] - coordo[0], coordp3[1] - coordo[1], coordp3[2] - coordo[2]]
38 pm = (u[0]*v[1]*w[2] + v[0]*w[1]*u[2] + w[0]*u[1]*v[2]) - (u[0]*w[1]*v[2] + v[0]*u[1]*w[2] + w[0]*v[1]*u[2])
39 logging.debug('pm=%s', pm)