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42cf5bc1ca
Automatic upgrade of OCCT code by command "occt_upgrade . -nocdl": - WOK-generated header files from inc and sources from drv are moved to src - CDL files removed - All packages are converted to nocdlpack
108 lines
3.6 KiB
C++
108 lines
3.6 KiB
C++
// Created on: 1993-10-18
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// Created by: Christophe MARION
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// Copyright (c) 1993-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <BRep_Tool.hxx>
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#include <BRepAdaptor_Curve2d.hxx>
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#include <BRepExtrema_ExtPF.hxx>
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#include <BRepLib_MakeVertex.hxx>
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#include <gp.hxx>
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#include <gp_Dir.hxx>
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#include <HLRBRep_Curve.hxx>
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#include <HLRBRep_EdgeFaceTool.hxx>
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#include <HLRBRep_Surface.hxx>
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#include <TopoDS_Vertex.hxx>
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//=======================================================================
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//function : CurvatureDirection
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//purpose :
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//=======================================================================
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Standard_Real HLRBRep_EdgeFaceTool::CurvatureValue
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(const Standard_Address F,
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const Standard_Real U,
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const Standard_Real V,
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const gp_Dir& Tg)
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{
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gp_Pnt P;
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gp_Vec D1U,D1V,D2U,D2V,D2UV;
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((HLRBRep_Surface*)F)->D2(U,V,P,D1U,D1V,D2U,D2V,D2UV);
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Standard_Real d1ut = D1U*Tg;
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Standard_Real d1vt = D1V*Tg;
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Standard_Real d1ud1v = D1U*D1V;
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Standard_Real nmu2 = D1U*D1U;
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Standard_Real nmv2 = D1V*D1V;
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Standard_Real det = nmu2 * nmv2 - d1ud1v * d1ud1v;
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Standard_Real alfa = ( d1ut * nmv2 - d1vt * d1ud1v ) / det;
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Standard_Real beta = ( d1vt * nmu2 - d1ut * d1ud1v ) / det;
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gp_Vec Nm = D1U ^ D1V;
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if (Nm.Magnitude() > gp::Resolution()) {
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Nm.Normalize();
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Standard_Real alfa2 = alfa*alfa;
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Standard_Real beta2 = beta*beta;
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Standard_Real alfabeta = alfa*beta;
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Standard_Real N = (Nm*D2U)*alfa2 + 2*(Nm*D2UV)*alfabeta + (Nm*D2V)*beta2;
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Standard_Real D = nmu2 *alfa2 + 2*d1ud1v *alfabeta + nmv2 *beta2;
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return N/D;
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}
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return 0.;
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}
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//=======================================================================
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//function : UVPoint
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//purpose :
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//=======================================================================
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Standard_Boolean HLRBRep_EdgeFaceTool::UVPoint(const Standard_Real Par,
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const Standard_Address E,
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const Standard_Address F,
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Standard_Real& U,
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Standard_Real& V)
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{
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Standard_Real pfbid,plbid;
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if (BRep_Tool::CurveOnSurface
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(((HLRBRep_Curve *)E)->Curve().Edge(),
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((HLRBRep_Surface*)F)->Surface().Face(),pfbid,plbid).IsNull())
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{
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BRepExtrema_ExtPF proj
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(BRepLib_MakeVertex(((HLRBRep_Curve*)E)->Value3D(Par)),
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((HLRBRep_Surface*)F)->Surface().Face());
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Standard_Integer i, index = 0;
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Standard_Real dist2 = RealLast();
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const Standard_Integer n = proj.NbExt();
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for (i = 1; i <= n; i++) {
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const Standard_Real newdist2 = proj.SquareDistance(i);
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if (newdist2 < dist2) {
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dist2 = newdist2;
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index = i;
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}
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}
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if (index == 0)
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return Standard_False;
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proj.Parameter(index,U,V);
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}
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else {
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BRepAdaptor_Curve2d PC
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(((HLRBRep_Curve *)E)->Curve().Edge(),
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((HLRBRep_Surface*)F)->Surface().Face());
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gp_Pnt2d P2d;
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PC.D0(Par,P2d);
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U = P2d.X();
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V = P2d.Y();
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}
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return Standard_True;
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}
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