mirror of
https://git.dev.opencascade.org/repos/occt.git
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cc164fd7dc
GeomLib_IsPlanarSurface.cxx - using poles for checking BSpline, Bezier curves and surface changed
on checking by curve, surface points.
BRepOffset_MakeOffset.cxx - set normal of plane surface according to normal of initial face surface
tests/cr/bugs/bug33170 - new test case added
269 lines
6.5 KiB
C++
269 lines
6.5 KiB
C++
// Created on: 1998-11-23
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// Created by: Philippe MANGIN
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// Copyright (c) 1998-1999 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 <Geom_BezierCurve.hxx>
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#include <Geom_BezierSurface.hxx>
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#include <Geom_BSplineCurve.hxx>
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#include <Geom_BSplineSurface.hxx>
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#include <Geom_Curve.hxx>
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#include <Geom_Surface.hxx>
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#include <GeomAdaptor_Curve.hxx>
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#include <GeomAdaptor_Surface.hxx>
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#include <GeomLib.hxx>
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#include <GeomLib_IsPlanarSurface.hxx>
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#include <gp_Pln.hxx>
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#include <StdFail_NotDone.hxx>
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#include <TColgp_Array1OfPnt.hxx>
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#include <TColgp_HArray1OfPnt.hxx>
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static Standard_Boolean Controle(const TColgp_Array1OfPnt& Poles,
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const Standard_Real Tol,
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const Handle(Geom_Surface)& S,
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gp_Pln& Plan)
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{
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Standard_Boolean IsPlan = Standard_False;
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Standard_Real gx,gy,gz;
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gp_Pnt Bary;
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gp_Dir DX, DY;
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Standard_Real aTolSingular = Precision::Confusion();
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GeomLib::Inertia(Poles, Bary, DX, DY, gx, gy, gz);
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if (gz < Tol && gy > aTolSingular) {
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gp_Pnt P;
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gp_Vec DU, DV;
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Standard_Real umin, umax, vmin, vmax;
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S->Bounds(umin, umax, vmin, vmax);
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S->D1((umin + umax) / 2, (vmin + vmax) / 2, P, DU, DV);
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// On prend DX le plus proche possible de DU
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gp_Dir du(DU);
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Standard_Real Angle1 = du.Angle(DX);
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Standard_Real Angle2 = du.Angle(DY);
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if (Angle1 > M_PI / 2) Angle1 = M_PI - Angle1;
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if (Angle2 > M_PI / 2) Angle2 = M_PI - Angle2;
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if (Angle2 < Angle1) {
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du = DY; DY = DX; DX = du;
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}
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if (DX.Angle(DU) > M_PI / 2) DX.Reverse();
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if (DY.Angle(DV) > M_PI / 2) DY.Reverse();
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gp_Ax3 axe(Bary, DX^DY, DX);
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Plan.SetPosition(axe);
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Plan.SetLocation(Bary);
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IsPlan = Standard_True;
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}
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return IsPlan;
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}
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static Standard_Boolean Controle(const Handle(Geom_Curve)& C,
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const gp_Pln& Plan,
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const Standard_Real Tol)
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{
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Standard_Boolean B = Standard_True;
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Standard_Integer ii, Nb;
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GeomAbs_CurveType Type;
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GeomAdaptor_Curve AC(C);
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Type = AC.GetType();
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switch (Type) {
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case GeomAbs_Line :
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{
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Nb = 2;
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break;
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}
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case GeomAbs_Circle:
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{
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Nb = 3;
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break;
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}
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case GeomAbs_Ellipse:
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case GeomAbs_Hyperbola:
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case GeomAbs_Parabola:
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{
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Nb = 5;
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break;
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}
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case GeomAbs_BezierCurve:
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{
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Nb = AC.NbPoles();
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break;
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}
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case GeomAbs_BSplineCurve:
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{
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Nb = AC.NbPoles();
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break;
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}
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default :
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{
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Nb = 8 + 3*AC.NbIntervals(GeomAbs_CN);
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}
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}
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Standard_Real u, du, f, l, d;
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f = AC.FirstParameter();
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l = AC.LastParameter();
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du = (l - f) / (Nb - 1);
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for (ii = 1; ii <= Nb && B; ii++) {
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u = (ii - 1)*du + f;
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d = Plan.Distance(C->Value(u));
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B = d < Tol;
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}
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return B;
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}
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GeomLib_IsPlanarSurface::GeomLib_IsPlanarSurface(const Handle(Geom_Surface)& S,
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const Standard_Real Tol)
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{
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GeomAdaptor_Surface AS(S);
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GeomAbs_SurfaceType Type;
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Type = AS.GetType();
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switch (Type) {
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case GeomAbs_Plane :
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{
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IsPlan = Standard_True;
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myPlan = AS.Plane();
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break;
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}
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case GeomAbs_Cylinder :
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case GeomAbs_Cone :
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case GeomAbs_Sphere :
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case GeomAbs_Torus :
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{
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IsPlan = Standard_False;
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break;
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}
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case GeomAbs_SurfaceOfRevolution :
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{
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Standard_Boolean Essai = Standard_True;
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gp_Pnt P;
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gp_Vec DU, DV, Dn;
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gp_Dir Dir = AS.AxeOfRevolution().Direction();
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Standard_Real Umin, Umax, Vmin, Vmax;
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S->Bounds(Umin, Umax, Vmin, Vmax);
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S->D1((Umin+Umax)/2, (Vmin+Vmax)/2, P, DU, DV);
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if (DU.Magnitude() <= gp::Resolution() ||
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DV.Magnitude() <= gp::Resolution())
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{
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Standard_Real NewU = (Umin+Umax)/2 + (Umax-Umin)*0.1;
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Standard_Real NewV = (Vmin+Vmax)/2 + (Vmax-Vmin)*0.1;
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S->D1( NewU, NewV, P, DU, DV );
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}
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Dn = DU^DV;
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if (Dn.Magnitude() > 1.e-7) {
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Standard_Real angle = Dir.Angle(Dn);
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if (angle > M_PI/2) {
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angle = M_PI - angle;
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Dir.Reverse();
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}
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Essai = (angle < 0.1);
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}
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if (Essai) {
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gp_Ax3 axe(P, Dir);
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axe.SetXDirection(DU);
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myPlan.SetPosition(axe);
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myPlan.SetLocation(P);
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Handle(Geom_Curve) C;
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C = S->UIso(Umin);
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IsPlan = Controle(C, myPlan, Tol);
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}
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else
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IsPlan = Standard_False;
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break;
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}
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case GeomAbs_SurfaceOfExtrusion :
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{
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Standard_Boolean Essai = Standard_False;
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Standard_Real Umin, Umax, Vmin, Vmax;
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Standard_Real norm;
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gp_Vec Du, Dv, Dn;
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gp_Pnt P;
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S->Bounds(Umin, Umax, Vmin, Vmax);
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S->D1((Umin+Umax)/2, (Vmin+Vmax)/2, P, Du, Dv);
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if (Du.Magnitude() <= gp::Resolution() ||
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Dv.Magnitude() <= gp::Resolution())
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{
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Standard_Real NewU = (Umin+Umax)/2 + (Umax-Umin)*0.1;
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Standard_Real NewV = (Vmin+Vmax)/2 + (Vmax-Vmin)*0.1;
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S->D1( NewU, NewV, P, Du, Dv );
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}
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Dn = Du^Dv;
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norm = Dn.Magnitude();
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if (norm > 1.e-15) {
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Dn /= norm;
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Standard_Real angmax = Tol / (Vmax-Vmin);
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gp_Dir D(Dn);
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Essai = (D.IsNormal(AS.Direction(), angmax));
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}
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if (Essai) {
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gp_Ax3 axe(P, Dn, Du);
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myPlan.SetPosition(axe);
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myPlan.SetLocation(P);
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Handle(Geom_Curve) C;
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C = S->VIso((Vmin+Vmax)/2);
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IsPlan = Controle(C, myPlan, Tol);
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}
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else
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IsPlan = Standard_False;
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break;
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}
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default :
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{
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Standard_Integer NbU,NbV, ii, jj, kk;
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NbU = 8 + 3*AS.NbUIntervals(GeomAbs_CN);
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NbV = 8 + 3*AS.NbVIntervals(GeomAbs_CN);
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Standard_Real Umin, Umax, Vmin, Vmax, du, dv, U, V;
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S->Bounds(Umin, Umax, Vmin, Vmax);
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du = (Umax-Umin)/(NbU-1);
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dv = (Vmax-Vmin)/(NbV-1);
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TColgp_Array1OfPnt Pnts(1, NbU*NbV);
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for(ii=0, kk=1; ii<NbU; ii++) {
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U = Umin + du*ii;
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for(jj=0; jj<NbV; jj++,kk++) {
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V = Vmin + dv*jj;
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S->D0(U,V, Pnts(kk));
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}
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}
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IsPlan = Controle(Pnts, Tol, S, myPlan);
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}
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}
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}
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Standard_Boolean GeomLib_IsPlanarSurface::IsPlanar() const
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{
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return IsPlan;
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}
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const gp_Pln& GeomLib_IsPlanarSurface::Plan() const
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{
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if (!IsPlan) throw StdFail_NotDone(" GeomLib_IsPlanarSurface");
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return myPlan;
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}
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