| 1 | // Created on: 1993-12-06 |
| 2 | // Created by: Jacques GOUSSARD |
| 3 | // Copyright (c) 1993-1999 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 | #include <BRepBlend_BlendTool.ixx> |
| 18 | |
| 19 | #include <BRepClass_FaceClassifier.hxx> |
| 20 | #include <Extrema_EPCOfExtPC2d.hxx> |
| 21 | #include <Extrema_POnCurv2d.hxx> |
| 22 | #include <TopoDS_Vertex.hxx> |
| 23 | #include <TopoDS_Edge.hxx> |
| 24 | #include <BRep_Tool.hxx> |
| 25 | #include <Geom2d_Line.hxx> |
| 26 | #include <Geom2dAdaptor_Curve.hxx> |
| 27 | #include <gp_Dir2d.hxx> |
| 28 | #include <gp_Vec2d.hxx> |
| 29 | #include <Geom2dInt_GInter.hxx> |
| 30 | #include <IntRes2d_IntersectionPoint.hxx> |
| 31 | #include <BRepBlend_HCurve2dTool.hxx> |
| 32 | |
| 33 | |
| 34 | //======================================================================= |
| 35 | //function : Project |
| 36 | //purpose : Projection orthogonal d'un point sur une courbe |
| 37 | // pmn 8/10/98 : On retourne toujours une distance. (BUC60360) |
| 38 | //======================================================================= |
| 39 | Standard_Boolean BRepBlend_BlendTool::Project(const gp_Pnt2d& P, |
| 40 | const Handle(Adaptor3d_HSurface)&, |
| 41 | const Handle(Adaptor2d_HCurve2d)& C, |
| 42 | Standard_Real& Paramproj, |
| 43 | Standard_Real& Dist) |
| 44 | { |
| 45 | Paramproj = BRepBlend_HCurve2dTool::FirstParameter(C); |
| 46 | gp_Pnt2d P2d; |
| 47 | BRepBlend_HCurve2dTool::D0(C, Paramproj, P2d); |
| 48 | Dist = P2d.Distance(P); |
| 49 | |
| 50 | const Standard_Real t = BRepBlend_HCurve2dTool::LastParameter(C); |
| 51 | BRepBlend_HCurve2dTool::D0(C, t, P2d); |
| 52 | if (P2d.Distance(P) < Dist) { |
| 53 | Paramproj = t; |
| 54 | Dist = P2d.Distance(P); |
| 55 | } |
| 56 | |
| 57 | const Standard_Real epsX = 1.e-8; |
| 58 | const Standard_Integer Nbu = 20; |
| 59 | const Standard_Real Tol = 1.e-5; |
| 60 | Extrema_EPCOfExtPC2d extrema(P, C->Curve2d(), Nbu, epsX, Tol); |
| 61 | if (!extrema.IsDone()) |
| 62 | return Standard_True; |
| 63 | |
| 64 | const Standard_Integer Nbext = extrema.NbExt(); |
| 65 | Standard_Real aDist2 = Dist * Dist; |
| 66 | for (Standard_Integer i=1; i<=Nbext; i++) { |
| 67 | if (extrema.SquareDistance(i) < aDist2) { |
| 68 | aDist2 = extrema.SquareDistance(i); |
| 69 | Paramproj = extrema.Point(i).Parameter(); |
| 70 | } |
| 71 | } |
| 72 | Dist = sqrt (aDist2); |
| 73 | |
| 74 | return Standard_True; |
| 75 | } |
| 76 | |
| 77 | //======================================================================= |
| 78 | //function : Inters |
| 79 | //purpose : Intersection d'un segment avec une courbe |
| 80 | //======================================================================= |
| 81 | Standard_Boolean BRepBlend_BlendTool::Inters(const gp_Pnt2d& P1, |
| 82 | const gp_Pnt2d& P2, |
| 83 | const Handle(Adaptor3d_HSurface)&, |
| 84 | const Handle(Adaptor2d_HCurve2d)& C, |
| 85 | Standard_Real& Param, |
| 86 | Standard_Real& Dist) |
| 87 | { |
| 88 | const Standard_Real Tol = 1.e-8; |
| 89 | const gp_Vec2d v(P1,P2); |
| 90 | const Standard_Real mag = v.Magnitude(); |
| 91 | if(mag < Tol) return Standard_False; |
| 92 | |
| 93 | gp_Dir2d d(v); |
| 94 | Handle(Geom2d_Line) bid = new Geom2d_Line(P1,d); |
| 95 | Geom2dAdaptor_Curve seg(bid,-0.01*mag,1.01*mag); |
| 96 | |
| 97 | Geom2dInt_GInter inter(seg,C->Curve2d(),Tol,Tol); |
| 98 | if (!inter.IsDone()) |
| 99 | return Standard_False; |
| 100 | |
| 101 | const Standard_Integer Nbint = inter.NbPoints(); |
| 102 | if (Nbint == 0) |
| 103 | return Standard_False; |
| 104 | |
| 105 | IntRes2d_IntersectionPoint ip = inter.Point(1); |
| 106 | Param = ip.ParamOnSecond(); |
| 107 | Dist = P1.Distance(ip.Value()); |
| 108 | return Standard_True; |
| 109 | } |
| 110 | |
| 111 | Standard_Integer BRepBlend_BlendTool::NbSamplesV |
| 112 | (const Handle(Adaptor3d_HSurface)&, |
| 113 | const Standard_Real, |
| 114 | const Standard_Real) |
| 115 | { |
| 116 | return 10; |
| 117 | } |
| 118 | |
| 119 | Standard_Integer BRepBlend_BlendTool::NbSamplesU |
| 120 | (const Handle(Adaptor3d_HSurface)&, |
| 121 | const Standard_Real, |
| 122 | const Standard_Real) |
| 123 | { |
| 124 | return 10; |
| 125 | } |
| 126 | |
| 127 | void BRepBlend_BlendTool::Bounds(const Handle(Adaptor2d_HCurve2d)& A, |
| 128 | Standard_Real& Ufirst, |
| 129 | Standard_Real& Ulast) |
| 130 | { |
| 131 | Ufirst = BRepBlend_HCurve2dTool::FirstParameter(A); |
| 132 | Ulast = BRepBlend_HCurve2dTool::LastParameter(A); |
| 133 | } |