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1 | // Created on: 1993-12-06 |
2 | // Created by: Jacques GOUSSARD |
3 | // Copyright (c) 1993-1999 Matra Datavision |
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4 | // Copyright (c) 1999-2014 OPEN CASCADE SAS |
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5 | // |
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6 | // This file is part of Open CASCADE Technology software library. |
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7 | // |
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8 | // This library is free software; you can redistribute it and / or modify it |
9 | // under the terms of the GNU Lesser General Public 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. |
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13 | // |
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14 | // Alternatively, this file may be used under the terms of Open CASCADE |
15 | // commercial license or contractual agreement. |
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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 |
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112 | (const Handle(Adaptor3d_HSurface)&, |
113 | const Standard_Real, |
114 | const Standard_Real) |
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115 | { |
116 | return 10; |
117 | } |
118 | |
119 | Standard_Integer BRepBlend_BlendTool::NbSamplesU |
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120 | (const Handle(Adaptor3d_HSurface)&, |
121 | const Standard_Real, |
122 | const Standard_Real) |
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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 | } |