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occt/src/HLRBRep/HLRBRep.cxx
bugmster 973c2be1e1 0024428: Implementation of LGPL license 
The copying permission statements at the beginning of source files updated to refer to LGPL.
Copyright dates extended till 2014 in advance.
2013-12-17 12:42:41 +04:00

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// Created on: 1992-08-27
// Created by: Christophe MARION
// Copyright (c) 1992-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and / or modify it
// under the terms of the GNU Lesser General Public version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.
#include <HLRBRep.ixx>
#include <BRepLib_MakeEdge2d.hxx>
#include <Geom2d_BezierCurve.hxx>
#include <Geom2d_BSplineCurve.hxx>
#include <Geom_BSplineCurve.hxx>
#include <TColStd_Array1OfInteger.hxx>
#include <TColStd_Array1OfReal.hxx>
#include <TColgp_Array1OfPnt2d.hxx>
#include <BRep_Tool.hxx>
#include <TopoDS.hxx>
#include <TopExp.hxx>
#include <BRepLib_MakeVertex.hxx>
#include <BRep_Builder.hxx>
//=======================================================================
//function : MakeEdge
//purpose :
//=======================================================================
TopoDS_Edge HLRBRep::MakeEdge (const HLRBRep_Curve& ec,
const Standard_Real U1,
const Standard_Real U2)
{
TopoDS_Edge Edg;
const Standard_Real sta = ec.Parameter2d(U1);
const Standard_Real end = ec.Parameter2d(U2);
switch (ec.GetType())
{
case GeomAbs_Line:
Edg = BRepLib_MakeEdge2d(ec.Line(),sta,end);
break;
case GeomAbs_Circle:
Edg = BRepLib_MakeEdge2d(ec.Circle(),sta,end);
break;
case GeomAbs_Ellipse:
Edg = BRepLib_MakeEdge2d(ec.Ellipse(),sta,end);
break;
case GeomAbs_Hyperbola:
Edg = BRepLib_MakeEdge2d(ec.Hyperbola(),sta,end);
break;
case GeomAbs_Parabola:
Edg = BRepLib_MakeEdge2d(ec.Parabola(),sta,end);
break;
case GeomAbs_BezierCurve: {
TColgp_Array1OfPnt2d Poles(1,ec.NbPoles());
Handle(Geom2d_BezierCurve) ec2d;
if (ec.IsRational()) {
TColStd_Array1OfReal Weights(1,ec.NbPoles());
ec.PolesAndWeights(Poles,Weights);
ec2d = new Geom2d_BezierCurve(Poles,Weights);
}
else {
ec.Poles(Poles);
ec2d = new Geom2d_BezierCurve(Poles);
}
BRepLib_MakeEdge2d mke2d(ec2d,sta,end);
if (mke2d.IsDone())
Edg = mke2d.Edge();
break;
}
case GeomAbs_BSplineCurve: {
Handle(Geom2d_BSplineCurve) ec2d;
GeomAdaptor_Curve GAcurve = ec.GetCurve().Curve();
TopoDS_Edge anEdge = ec.GetCurve().Edge();
Standard_Real fpar, lpar;
Handle(Geom_Curve) aCurve = BRep_Tool::Curve(anEdge, fpar, lpar);
const Handle(Geom_BSplineCurve)& BSplCurve = Handle(Geom_BSplineCurve)::DownCast(aCurve);
Handle(Geom_BSplineCurve) theCurve = Handle(Geom_BSplineCurve)::DownCast(BSplCurve->Copy());
if (theCurve->IsPeriodic() && !GAcurve.IsClosed())
{
theCurve->Segment(sta, end);
TColgp_Array1OfPnt2d Poles(1, theCurve->NbPoles());
TColStd_Array1OfReal knots(1, theCurve->NbKnots());
TColStd_Array1OfInteger mults(1, theCurve->NbKnots());
//-- ec.KnotsAndMultiplicities(knots,mults);
theCurve->Knots(knots);
theCurve->Multiplicities(mults);
if (theCurve->IsRational()) {
TColStd_Array1OfReal Weights(1, theCurve->NbPoles());
ec.PolesAndWeights(theCurve, Poles, Weights);
ec2d = new Geom2d_BSplineCurve(Poles, Weights, knots, mults,
theCurve->Degree(), theCurve->IsPeriodic());
}
else {
ec.Poles(theCurve, Poles);
ec2d = new Geom2d_BSplineCurve(Poles, knots, mults,
theCurve->Degree(), theCurve->IsPeriodic());
}
}
else
{
TColgp_Array1OfPnt2d Poles(1,ec.NbPoles());
TColStd_Array1OfReal knots(1,ec.NbKnots());
TColStd_Array1OfInteger mults(1,ec.NbKnots());
//-- ec.KnotsAndMultiplicities(knots,mults);
ec.Knots(knots);
ec.Multiplicities(mults);
if (ec.IsRational()) {
TColStd_Array1OfReal Weights(1,ec.NbPoles());
ec.PolesAndWeights(Poles,Weights);
ec2d = new Geom2d_BSplineCurve(Poles,Weights,knots,mults,ec.Degree(),ec.IsPeriodic());
}
else {
ec.Poles(Poles);
ec2d = new Geom2d_BSplineCurve(Poles,knots,mults,ec.Degree(),ec.IsPeriodic());
}
}
BRepLib_MakeEdge2d mke2d(ec2d, sta, end);
if (mke2d.IsDone())
Edg = mke2d.Edge();
break;
}
default: {
const Standard_Integer nbPnt = 15;
TColgp_Array1OfPnt2d Poles(1,nbPnt);
TColStd_Array1OfReal knots(1,nbPnt);
TColStd_Array1OfInteger mults(1,nbPnt);
mults.Init(1);
mults(1 ) = 2;
mults(nbPnt) = 2;
const Standard_Real step = (U2-U1)/(nbPnt-1);
Standard_Real par3d = U1;
for (Standard_Integer i = 1; i < nbPnt; i++) {
Poles(i) = ec.Value(par3d);
knots(i) = par3d;
par3d += step;
}
Poles(nbPnt) = ec.Value(U2);
knots(nbPnt) = U2;
Handle(Geom2d_BSplineCurve) ec2d = new Geom2d_BSplineCurve(Poles,knots,mults,1);
BRepLib_MakeEdge2d mke2d(ec2d,sta,end);
if (mke2d.IsDone())
Edg = mke2d.Edge();
}
}
return Edg;
}
//=======================================================================
//function : MakeEdge3d
//purpose :
//=======================================================================
TopoDS_Edge HLRBRep::MakeEdge3d(const HLRBRep_Curve& ec,
const Standard_Real U1,
const Standard_Real U2)
{
TopoDS_Edge Edg;
//const Standard_Real sta = ec.Parameter2d(U1);
//const Standard_Real end = ec.Parameter2d(U2);
TopoDS_Edge anEdge = ec.GetCurve().Edge();
Standard_Real fpar, lpar;
//BRep_Tool::Range(anEdge, fpar, lpar);
//Handle(Geom_Curve) aCurve = BRep_Tool::Curve(anEdge, fpar, lpar);
BRepAdaptor_Curve BAcurve(anEdge);
fpar = BAcurve.FirstParameter();
lpar = BAcurve.LastParameter();
Edg = TopoDS::Edge(anEdge.EmptyCopied());
Edg.Orientation(TopAbs_FORWARD);
BRep_Builder BB;
BB.Range(Edg, U1, U2);
//Share vertices if possible
TopoDS_Vertex V1, V2, V1new, V2new;
TopExp::Vertices(anEdge, V1, V2);
Standard_Real Tol = Precision::PConfusion();
if (Abs(fpar - U1) <= Tol)
V1new = V1;
else
{
gp_Pnt aPnt = BAcurve.Value(U1);
V1new = BRepLib_MakeVertex(aPnt);
}
if (Abs(lpar - U2) <= Tol)
V2new = V2;
else
{
gp_Pnt aPnt = BAcurve.Value(U2);
V2new = BRepLib_MakeVertex(aPnt);
}
V1new.Orientation(TopAbs_FORWARD);
V2new.Orientation(TopAbs_REVERSED);
BB.Add(Edg, V1new);
BB.Add(Edg, V2new);
return Edg;
}
//=======================================================================
//function : PolyHLRAngleAndDeflection
//purpose :
//=======================================================================
void
HLRBRep::PolyHLRAngleAndDeflection (const Standard_Real InAngl,
Standard_Real& OutAngl,
Standard_Real& OutDefl)
{
static Standard_Real HAngMin = 1*M_PI/180;
static Standard_Real HAngLim = 5*M_PI/180;
static Standard_Real HAngMax = 35*M_PI/180;
OutAngl = InAngl;
if (OutAngl < HAngMin) OutAngl = HAngMin;
if (OutAngl > HAngMax) OutAngl = HAngMax;
OutAngl = HAngLim + sqrt((OutAngl - HAngMin) * (HAngMax - HAngLim) *
(HAngMax - HAngLim) / (HAngMax - HAngMin));
OutDefl = OutAngl * OutAngl * 0.5;
}
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