# -*- coding: utf-8 -*-
+# Copyright (C) 2014-2024 CEA, EDF
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library 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
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+# See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
+#
+"""Projection d'un point sur une courbe."""
-from .geomsmesh import geompy
import logging
-import math
-# -----------------------------------------------------------------------------
-# --- projection d'un point sur une courbe.
+from .geomsmesh import geompy
-def projettePointSurCourbe(pt, edge):
+def projettePointSurCourbe(point, edge):
"""
projection d'un point p sur une courbe c
on suppose que la distance (c(u), p) passe par un minimum quand u varie entre 0 et 1
- et qu'elle presente pas de minimum local
+ et qu'elle presente pas de minimum local
"""
#logging.debug("start")
- dist = []
- nbSlices = 50
- du = 1.0/nbSlices
- for i in range(nbSlices + 1):
- p = geompy.MakeVertexOnCurve(edge, du*i)
- d = geompy.MinDistance(p,pt)
- dist.append((d,i))
+ dist = list()
+ nb_slices = 50
+ delta = 1.0/float(nb_slices)
+ for i_aux in range(nb_slices + 1):
+ pti = geompy.MakeVertexOnCurve(edge, delta*float(i_aux))
+ dpti = geompy.MinDistance(pti,point)
+ dist.append((dpti,i_aux))
dist.sort()
+
#logging.debug("dist %s", dist)
- umin = du*dist[0][1]
- umax = du*dist[1][1]
+ umin = delta*dist[0][1]
+ umax = delta*dist[1][1]
#umin = 0.0
#umax = 1.0
tol = 1.e-8
pmin = geompy.MakeVertexOnCurve(edge, umin)
pmax = geompy.MakeVertexOnCurve(edge, umax)
- dmin = geompy.MinDistance(pmin,pt)
- dmax = geompy.MinDistance(pmax,pt)
+ dmin = geompy.MinDistance(pmin,point)
+ dmax = geompy.MinDistance(pmax,point)
dext = geompy.MinDistance(pmin,pmax)
- i=0
- while dext > tol and i < 100 :
- i = i+1
+ i_aux = 0
+ while ( ( dext > tol ) and ( i_aux < 100 ) ):
+ i_aux += 1
utest = (umax + umin) / 2.0
- ptest = geompy.MakeVertexOnCurve(edge, utest)
- dtest = geompy.MinDistance(ptest,pt)
+ ptest = geompy.MakeVertexOnCurve(edge, utest)
+ dtest = geompy.MinDistance(ptest,point)
if dmin < dmax:
umax = utest
pmax = ptest
dmin = dtest
dext = geompy.MinDistance(pmin,pmax)
#logging.debug('umin=%s umax=%s dmin=%s dmax=%s dtest=%s dext=%s', umin,umax,dmin,dmax,dtest,dext)
- if abs(utest) < 1.e-7:
+
+ if ( abs(utest) < 1.e-7 ):
utest = 0.0
- if abs(1.0-utest) < 1.e-7:
+ elif ( abs(1.0-utest) < 1.e-7 ):
utest = 1.0
- logging.debug('u=%s, nbiter=%s dtest=%s dext=%s',utest,i,dtest,dext)
+ logging.debug('u=%s, nbiter=%s dtest=%s dext=%s',utest,i_aux,dtest,dext)
+
return utest
-
\ No newline at end of file