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d5f74e42d6
License statement text corrected; compiler warnings caused by Bison 2.41 disabled for MSVC; a few other compiler warnings on 54-bit Windows eliminated by appropriate type cast Wrong license statements corrected in several files. Copyright and license statements added in XSD and GLSL files. Copyright year updated in some files. Obsolete documentation files removed from DrawResources.
366 lines
11 KiB
Plaintext
366 lines
11 KiB
Plaintext
// Created on: 1993-12-14
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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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// 05-Jun-00 : hla : meme type de corr. que xab : dans la methode "Perform",
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// suppression du test mal a propos "myintuinf > myintusup" avec
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// "return" a la suite.
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// 05-Sep-95 : xab : correction d'un probleme de determination d'intervalle
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// de recherche
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#include Extrema_ELPC_hxx
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#include ThePOnC_hxx
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#include ThePoint_hxx
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#include TheVector_hxx
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#include <StdFail_NotDone.hxx>
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#include <Standard_DomainError.hxx>
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#include <GeomAbs_CurveType.hxx>
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#include <Precision.hxx>
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#include <TColStd_Array1OfReal.hxx>
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//=======================================================================
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//function : Extrema_GLocateExtPC
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//purpose :
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//=======================================================================
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Extrema_GLocateExtPC::Extrema_GLocateExtPC() { }
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//=======================================================================
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//function : Extrema_GLocateExtPC
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//purpose :
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//=======================================================================
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Extrema_GLocateExtPC::Extrema_GLocateExtPC (const ThePoint& P,
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const TheCurve& C,
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const Standard_Real U0,
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const Standard_Real TolF)
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{
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Initialize(C, TheCurveTool::FirstParameter(C), TheCurveTool::LastParameter(C), TolF);
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Perform(P, U0);
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}
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//=======================================================================
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//function : Extrema_GLocateExtPC
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//purpose :
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//=======================================================================
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Extrema_GLocateExtPC::Extrema_GLocateExtPC (const ThePoint& P,
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const TheCurve& C,
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const Standard_Real U0,
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const Standard_Real Umin,
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const Standard_Real Usup,
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const Standard_Real TolF)
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{
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Initialize(C, Umin, Usup, TolF);
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Perform(P, U0);
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}
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//=======================================================================
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//function : Initialize
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//purpose :
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//=======================================================================
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void Extrema_GLocateExtPC::Initialize(const TheCurve& C,
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const Standard_Real Umin,
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const Standard_Real Usup,
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const Standard_Real TolF)
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{
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myC = (Standard_Address)&C;
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mytol = TolF;
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myumin = Umin;
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myusup = Usup;
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type = TheCurveTool::GetType(C);
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Standard_Real tolu = TheCurveTool::Resolution(C, Precision::Confusion());
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if ((type == GeomAbs_BSplineCurve) ||
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(type == GeomAbs_BezierCurve) ||
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(type == GeomAbs_OtherCurve)) {
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myLocExtPC.Initialize(C, Umin, Usup, tolu);
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}
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else {
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myExtremPC.Initialize(C, Umin, Usup, tolu);
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}
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}
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//=======================================================================
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//function : Perform
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//purpose :
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//=======================================================================
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void Extrema_GLocateExtPC::Perform(const ThePoint& P,
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const Standard_Real U0)
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{
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Standard_Integer i, i1, i2, inter;
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Standard_Real Par, valU, valU2 = RealLast(),
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local_u0 ;
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Standard_Real myintuinf=0, myintusup=0;
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local_u0 = U0 ;
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switch(type)
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{
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case GeomAbs_OtherCurve:
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case GeomAbs_BSplineCurve:
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{
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// La recherche de l extremum est faite intervalle continu C2 par
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// intervalle continu C2 de la courbe
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Standard_Integer n = TheCurveTool::NbIntervals(*((TheCurve*)myC), GeomAbs_C2);
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TColStd_Array1OfReal theInter(1, n+1);
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TheCurveTool::Intervals(*((TheCurve*)myC), theInter, GeomAbs_C2);
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//
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// be gentle with the caller
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//
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if (local_u0 < myumin) {
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local_u0 = myumin ;
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}
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else if (local_u0 > myusup) {
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local_u0 = myusup ;
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}
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// Recherche de l intervalle ou se trouve U0
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Standard_Boolean found = Standard_False;
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inter = 1;
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while (!found && inter <= n) {
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// Intervalle commun a l intervalle C2 courant de la courbe et a
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// l intervalle total de recherche de l'extremum (hla : au cas ou
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// myintuinf > myintusup, c est que les 2 intervalles ne s intersectent
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// pas, mais il n'y avait aucune raison de sortir en "return")
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myintuinf = Max(theInter(inter), myumin);
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myintusup = Min(theInter(inter+1), myusup);
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if ((local_u0 >= myintuinf) && (local_u0 < myintusup)) found = Standard_True;
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inter++;
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}
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if( found ) inter--; //IFV 16.06.00 - inter is increased after found!
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// Essai sur l intervalle trouve
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myLocExtPC.Initialize((*((TheCurve*)myC)), myintuinf,
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myintusup, mytol);
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myLocExtPC.Perform(P, local_u0);
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myDone = myLocExtPC.IsDone();
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if (myDone) {
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mypp = myLocExtPC.Point();
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myismin = myLocExtPC.IsMin();
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mydist2 = myLocExtPC.SquareDistance();
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}
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else {
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Standard_Integer k = 1;
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// Essai sur les intervalles alentours:
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i1 = inter;
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i2 = inter;
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Standard_Real s1inf, s2inf, s1sup, s2sup;
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ThePoint P1;
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TheVector V1;
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TheCurveTool::D1(*((TheCurve*)myC), myintuinf, P1, V1);
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s2inf = (TheVector(P, P1)*V1);
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TheCurveTool::D1(*((TheCurve*)myC), myintusup, P1, V1);
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s1sup = (TheVector(P, P1)*V1);
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while (!myDone && (i2 > 0) && (i1 <= n))
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{
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i1 = inter + k;
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i2 = inter - k;
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if (i1 <= n)
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{
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myintuinf = Max(theInter(i1), myumin);
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myintusup = Min(theInter(i1+1), myusup);
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if (myintuinf < myintusup)
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{
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TheCurveTool::D1(*((TheCurve*)myC), myintuinf, P1, V1);
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s2sup = (TheVector(P, P1)*V1);
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if (s1sup*s2sup <= RealEpsilon())
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{
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// extremum:
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myDone = Standard_True;
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mypp.SetValues(myintuinf, P1);
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myismin = (s1sup <= 0.0);
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mydist2 = P.SquareDistance(P1);
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break;
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}
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TheCurveTool::D1(*((TheCurve*)myC), myintusup, P1, V1);
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s1sup = (TheVector(P, P1)*V1);
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myLocExtPC.Initialize((*((TheCurve*)myC)), myintuinf,
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myintusup, mytol);
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myLocExtPC.Perform(P, (myintuinf + myintusup)*0.5);
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myDone = myLocExtPC.IsDone();
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if (myDone) {
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mypp = myLocExtPC.Point();
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myismin = myLocExtPC.IsMin();
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mydist2 = myLocExtPC.SquareDistance();
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break;
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}
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}
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}
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if (i2 > 0)
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{
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myintuinf = Max(theInter(i2), myumin);
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myintusup = Min(theInter(i2+1), myusup);
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if (myintuinf < myintusup)
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{
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TheCurveTool::D1(*((TheCurve*)myC), myintusup, P1, V1);
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s1inf = (TheVector(P, P1)*V1);
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if (s1inf*s2inf <= RealEpsilon())
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{
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// extremum:
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myDone = Standard_True;
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mypp.SetValues(myintusup, P1);
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myismin = (s1inf <= 0.0);
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mydist2 = P.SquareDistance(P1);
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break;
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}
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TheCurveTool::D1(*((TheCurve*)myC), myintuinf, P1, V1);
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s2inf = (TheVector(P, P1)*V1);
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myLocExtPC.Initialize((*((TheCurve*)myC)), myintuinf,
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myintusup, mytol);
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myLocExtPC.Perform(P, (myintuinf+myintusup)*0.5 );
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myDone = myLocExtPC.IsDone();
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if (myDone)
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{
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mypp = myLocExtPC.Point();
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myismin = myLocExtPC.IsMin();
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mydist2 = myLocExtPC.SquareDistance();
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break;
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}
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}
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}
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k++;
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}
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}
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}
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break;
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case GeomAbs_BezierCurve:
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{
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myLocExtPC.Perform(P, U0);
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myDone = myLocExtPC.IsDone();
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}
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break;
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default:
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{
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myExtremPC.Perform(P);
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numberext = 0;
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if (myExtremPC.IsDone())
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{
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for (i = 1; i <= myExtremPC.NbExt(); i++)
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{
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Par = myExtremPC.Point(i).Parameter();
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valU = Abs(Par - U0);
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if (valU <= valU2)
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{
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valU2 = valU;
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numberext = i;
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myDone = Standard_True;
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}
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}
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}
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if (numberext == 0)
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myDone = Standard_False;
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break;
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}
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}
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}
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//=======================================================================
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//function : IsDone
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//purpose :
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//=======================================================================
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Standard_Boolean Extrema_GLocateExtPC::IsDone () const
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{
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return myDone;
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}
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//=======================================================================
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//function : Value
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//purpose :
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//=======================================================================
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Standard_Real Extrema_GLocateExtPC::SquareDistance () const
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{
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if (!myDone) { StdFail_NotDone::Raise(); }
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Standard_Real d=0;
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if ((type == GeomAbs_BezierCurve)) {
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d = myLocExtPC.SquareDistance();
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}
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else if(type == GeomAbs_BSplineCurve || type == GeomAbs_OtherCurve) {
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d = mydist2;
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}
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else {
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if (numberext != 0) {
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d = myExtremPC.SquareDistance(numberext);
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}
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}
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return d;
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}
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//=======================================================================
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//function : IsMin
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//purpose :
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//=======================================================================
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Standard_Boolean Extrema_GLocateExtPC::IsMin () const
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{
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if (!myDone) { StdFail_NotDone::Raise(); }
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Standard_Boolean b=0;
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if ((type == GeomAbs_BezierCurve)) {
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b = myLocExtPC.IsMin();
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}
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else if(type == GeomAbs_BSplineCurve || type == GeomAbs_OtherCurve) {
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b = myismin;
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}
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else {
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if (numberext != 0) {
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b = myExtremPC.IsMin(numberext);
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}
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}
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return b;
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}
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//=======================================================================
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//function : Point
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//purpose :
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//=======================================================================
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const ThePOnC & Extrema_GLocateExtPC::Point () const
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{
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if (!myDone) { StdFail_NotDone::Raise(); }
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if (type == GeomAbs_BezierCurve) {
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return myLocExtPC.Point();
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}
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else if(type == GeomAbs_BSplineCurve || type == GeomAbs_OtherCurve) {
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return mypp;
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}
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return myExtremPC.Point(numberext);
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}
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