1 // Created on: 1992-11-19
2 // Created by: Remi LEQUETTE
3 // Copyright (c) 1992-1999 Matra Datavision
4 // Copyright (c) 1999-2012 OPEN CASCADE SAS
6 // The content of this file is subject to the Open CASCADE Technology Public
7 // License Version 6.5 (the "License"). You may not use the content of this file
8 // except in compliance with the License. Please obtain a copy of the License
9 // at http://www.opencascade.org and read it completely before using this file.
11 // The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
12 // main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
14 // The Original Code and all software distributed under the License is
15 // distributed on an "AS IS" basis, without warranty of any kind, and the
16 // Initial Developer hereby disclaims all such warranties, including without
17 // limitation, any warranties of merchantability, fitness for a particular
18 // purpose or non-infringement. Please see the License for the specific terms
19 // and conditions governing the rights and limitations under the License.
23 #include <BRepClass_Intersector.ixx>
24 #include <BRep_Tool.hxx>
25 #include <BRepAdaptor_Curve2d.hxx>
26 #include <BRepAdaptor_Surface.hxx>
27 #include <TopoDS_Vertex.hxx>
29 #include <IntRes2d_Domain.hxx>
30 #include <Geom2dLProp_CLProps2d.hxx>
31 #include <Geom2d_Curve.hxx>
33 #include <Precision.hxx>
35 #include <Geom2d_Line.hxx>
37 #include <Geom2dInt_GInter.hxx>
39 #include <Extrema_ExtPC2d.hxx>
40 #include <IntRes2d_Transition.hxx>
41 #include <IntRes2d_IntersectionPoint.hxx>
43 //=======================================================================
44 //function : BRepClass_Intersector
46 //=======================================================================
48 BRepClass_Intersector::BRepClass_Intersector()
52 //=======================================================================
55 //=======================================================================
57 void BRepClass_Intersector::Perform(const gp_Lin2d& L,
58 const Standard_Real P,
59 const Standard_Real Tol,
60 const BRepClass_Edge& E)
63 Standard_Real pfbid,plbid;
64 if (BRep_Tool::CurveOnSurface(E.Edge(),E.Face(),pfbid,plbid).IsNull()) {
65 done = Standard_False; // !IsDone()
70 DL.SetValues(L.Location(),0.,Tol,ElCLib::Value(P,L),P,Tol);
72 DL.SetValues(L.Location(),0.,Tol,Standard_True);
74 const TopoDS_Edge& EE = E.Edge();
75 const TopoDS_Face& F = E.Face();
76 TopoDS_Vertex Vdeb, Vfin;
77 TopExp::Vertices(EE, Vdeb, Vfin);
78 BRepAdaptor_Curve2d C(EE,F);
79 Standard_Real deb = C.FirstParameter(), fin = C.LastParameter();
81 // Case of "ON": direct check of belonging to edge
82 // taking into account the tolerance
83 Extrema_ExtPC2d theExtPC2d(L.Location(), C);
84 Standard_Real MinDist = RealLast(), aDist;
85 Standard_Integer MinInd = 0, i;
86 if (theExtPC2d.IsDone())
88 for (i = 1; i <= theExtPC2d.NbExt(); i++)
90 aDist = theExtPC2d.SquareDistance(i);
99 MinDist = sqrt(MinDist);
102 gp_Pnt2d pnt_exact = (theExtPC2d.Point(MinInd)).Value();
103 Standard_Real par = (theExtPC2d.Point(MinInd)).Parameter();
104 IntRes2d_Transition tr_on_lin(IntRes2d_Head);
105 IntRes2d_Position pos_on_curve = IntRes2d_Middle;
106 if (Abs(par - deb) <= Precision::Confusion())
107 pos_on_curve = IntRes2d_Head;
108 else if (Abs(par - fin) <= Precision::Confusion())
109 pos_on_curve = IntRes2d_End;
110 IntRes2d_Transition tr_on_curve(pos_on_curve);
111 IntRes2d_IntersectionPoint pnt_inter(pnt_exact, 0., par,
112 tr_on_lin, tr_on_curve, Standard_False);
113 this->Append(pnt_inter);
114 done = Standard_True;
122 Standard_Real toldeb = 1.e-5, tolfin = 1.e-5;
124 // essai de calcul juste des tolerances du domaine
125 // qui ne couche pas avec les modeles pourris de
127 BRepAdaptor_Surface S(F);
131 gp_Pnt P; gp_Vec DU, DV;
132 S.D1(pdeb.X(),pdeb.Y(),P,DU,DV);
133 Standard_Real scaldeb = (vdeb.X()*DU + vdeb.Y()*DV).Magnitude();
134 scaldeb = Max(scaldeb, 1.e-5);
135 toldeb = BRep_Tool::Tolerance(Vdeb)/scaldeb;
136 S.D1(pfin.X(),pfin.Y(),P,DU,DV);
137 Standard_Real scalfin = (vfin.X()*DU + vfin.Y()*DV).Magnitude();
138 scalfin = Max(scalfin, 1.e-5);
139 tolfin = BRep_Tool::Tolerance(Vfin)/scalfin;
142 IntRes2d_Domain DE(pdeb,deb,toldeb,pfin,fin,tolfin);
143 // temporary periodic domain
144 if (C.Curve()->IsPeriodic()) {
145 DE.SetEquivalentParameters(C.FirstParameter(),
147 C.Curve()->LastParameter() -
148 C.Curve()->FirstParameter());
151 Handle(Geom2d_Line) GL= new Geom2d_Line(L);
152 Geom2dAdaptor_Curve CGA(GL);
153 Geom2dInt_GInter Inter(CGA,DL,C,DE,
154 Precision::PConfusion(),
155 Precision::PIntersection());
156 this->SetValues(Inter);
160 //=======================================================================
161 //function : LocalGeometry
163 //=======================================================================
165 void BRepClass_Intersector::LocalGeometry(const BRepClass_Edge& E,
166 const Standard_Real U,
169 Standard_Real& C) const
172 Geom2dLProp_CLProps2d Prop(BRep_Tool::CurveOnSurface(E.Edge(),E.Face(),f,l),
173 U,2,Precision::PConfusion());
175 C = Prop.Curvature();
176 if (C > Precision::PConfusion())
179 Norm.SetCoord(Tang.Y(),-Tang.X());