1 // Created on: 1996-11-14
2 // Created by: Philippe MANGIN
3 // Copyright (c) 1996-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
5 //
6 // This file is part of Open CASCADE Technology software library.
7 //
8 // This library is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU Lesser General Public License version 2.1 as published
10 // by the Free Software Foundation, with special exception defined in the file
11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 // distribution for complete text of the license and disclaimer of any warranty.
13 //
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
16
17
18 #include <AdvApprox_PrefAndRec.hxx>
19 #include <Precision.hxx>
20 #include <Standard_DomainError.hxx>
21
AdvApprox_PrefAndRec(const TColStd_Array1OfReal & RecCut,const TColStd_Array1OfReal & PrefCut,const Standard_Real Weight)22 AdvApprox_PrefAndRec::AdvApprox_PrefAndRec(const TColStd_Array1OfReal& RecCut,
23 const TColStd_Array1OfReal& PrefCut,
24 const Standard_Real Weight):
25 myRecCutting(1, RecCut.Length()),
26 myPrefCutting(1, PrefCut.Length()),
27 myWeight(Weight)
28 {
29 myRecCutting = RecCut;
30 myPrefCutting = PrefCut;
31 if (myWeight <= 1) { throw Standard_DomainError("PrefAndRec : Weight is too small");}
32 }
33
Value(const Standard_Real a,const Standard_Real b,Standard_Real & cuttingvalue) const34 Standard_Boolean AdvApprox_PrefAndRec::Value(const Standard_Real a,
35 const Standard_Real b,
36 Standard_Real& cuttingvalue) const
37 {
38 // longueur minimum d'un intervalle parametrique : 10*PConfusion()
39 Standard_Real lgmin = 10 * Precision::PConfusion();
40 Standard_Integer i;
41 Standard_Real cut, mil=(a+b)/2, dist;
42
43 cut = mil;
44
45 // Recheche d'une decoupe preferentiel
46 dist = Abs( (a*myWeight+b)/(1+myWeight) - mil ) ;
47 for ( i=1; i<=myPrefCutting.Length(); i++) {
48 if ( dist > Abs(mil-myPrefCutting.Value(i))) {
49 cut = myPrefCutting.Value(i);
50 dist = Abs(mil-cut);
51 }
52 }
53
54 // Recheche d'une decoupe recommende
55 dist = Abs((a-b)/2);
56 for ( i=1; i<=myRecCutting.Length(); i++) {
57 if ((dist-lgmin) > Abs(mil-myRecCutting.Value(i))) {
58 cut = myRecCutting.Value(i);
59 dist = Abs(mil-cut);
60 }
61 }
62
63 // Resultat
64 cuttingvalue = cut;
65 return (Abs(cut-a)>=lgmin && Abs(b-cut)>=lgmin);
66 }
67