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// File: GeomLProp.cxx
// Created: Wed Feb 23 08:57:59 1994
// Author: Laurent BOURESCHE
// <lbo@nonox>
#include <GeomLProp.ixx>
#include <Precision.hxx>
#include <Geom_TrimmedCurve.hxx>
#include <Geom_BSplineCurve.hxx>
#include <GeomLProp_CLProps.hxx>
#include <gp_Dir.hxx>
#include <gp_Vec.hxx>
#include <GeomAbs_Shape.hxx>
Standard_Integer GeomAbsToInteger(const GeomAbs_Shape gcont)
{
Standard_Integer cont=0 ;
switch (gcont) {
case GeomAbs_C0 :
cont = 0 ;
break ;
case GeomAbs_G1 :
cont = 1 ;
break ;
case GeomAbs_C1 :
cont = 2 ;
break ;
case GeomAbs_G2 :
cont = 3 ;
break ;
case GeomAbs_C2 :
cont = 4 ;
break ;
case GeomAbs_C3 :
cont = 5 ;
break ;
case GeomAbs_CN :
cont = 6 ;
break ;
}
return cont ;
}
//=======================================================================
//function : Continuity
//purpose :
//=======================================================================
GeomAbs_Shape GeomLProp::Continuity(const Handle(Geom_Curve)& C1,
const Handle(Geom_Curve)& C2,
const Standard_Real u1,
const Standard_Real u2,
const Standard_Boolean r1,
const Standard_Boolean r2,
const Standard_Real tl,
const Standard_Real ta)
{
GeomAbs_Shape cont = GeomAbs_C0;
Standard_Integer index1,
index2 ;
Standard_Real tolerance ;
Standard_Boolean fini = Standard_False;
gp_Vec d1,d2;
gp_Dir dir1,dir2;
Standard_Integer cont1, cont2 ;
GeomAbs_Shape gcont1 = C1->Continuity(), gcont2 = C2->Continuity();
cont1 = GeomAbsToInteger(gcont1) ;
cont2 = GeomAbsToInteger(gcont2) ;
Handle(Geom_Curve) aCurve1 = C1 ;
Handle(Geom_Curve) aCurve2 = C2 ;
if (C1->IsKind(STANDARD_TYPE(Geom_TrimmedCurve))){
Handle(Geom_TrimmedCurve) aTrimmed =
Handle(Geom_TrimmedCurve) ::DownCast(aCurve1) ;
aCurve1 = aTrimmed->BasisCurve() ;
}
if (C2->IsKind(STANDARD_TYPE(Geom_TrimmedCurve))){
Handle(Geom_TrimmedCurve) aTrimmed =
Handle(Geom_TrimmedCurve) ::DownCast(aCurve2) ;
aCurve2 = aTrimmed->BasisCurve() ;
}
if (aCurve1->IsKind(STANDARD_TYPE(Geom_BSplineCurve))){
Handle(Geom_BSplineCurve) BSplineCurve =
Handle(Geom_BSplineCurve)::DownCast(aCurve1) ;
BSplineCurve->Resolution(tl,
tolerance) ;
BSplineCurve->LocateU(
u1,
tolerance,
index1,
index2) ;
if (index1 > 1 && index2 < BSplineCurve->NbKnots() && index1 == index2) {
cont1 = BSplineCurve->Degree() - BSplineCurve->Multiplicity(index1) ;
}
else {
cont1 = 5 ;
}
}
if (aCurve2->IsKind(STANDARD_TYPE(Geom_BSplineCurve))){
Handle(Geom_BSplineCurve) BSplineCurve =
Handle(Geom_BSplineCurve)::DownCast(aCurve2) ;
BSplineCurve->Resolution(tl,
tolerance) ;
BSplineCurve->LocateU(
u2,
tolerance,
index1,
index2) ;
if (index1 > 1 && index2 < BSplineCurve->NbKnots() && index1 == index2) {
cont2 = BSplineCurve->Degree() - BSplineCurve->Multiplicity(index1) ;
}
else {
cont2 = 5 ;
}
}
Standard_Integer n1 = 0, n2 = 0;
if (cont1 >= 5) n1 = 3;
else if(cont1 == 4) n1 = 2;
else if(cont1 == 2) n1 = 1;
if (cont2 >= 5) n2 = 3;
else if(cont2 == 4) n2 = 2;
else if(cont2 == 2) n2 = 1;
GeomLProp_CLProps clp1(C1,u1,n1,tl);
GeomLProp_CLProps clp2(C2,u2,n2,tl);
if(!(clp1.Value().IsEqual(clp2.Value(),tl))) {
Standard_Failure::Raise("Courbes non jointives");
}
Standard_Integer min = Min(n1,n2);
if ( min >= 1 ) {
d1 = clp1.D1();
d2 = clp2.D1();
if(r1) d1.Reverse();
if(r2) d2.Reverse();
if(d1.IsEqual(d2,tl,ta)) {
cont = GeomAbs_C1;
}
else if(clp1.IsTangentDefined() && clp2.IsTangentDefined()){
clp1.Tangent(dir1);
clp2.Tangent(dir2);
if(r1) dir1.Reverse();
if(r2) dir2.Reverse();
if(dir1.IsEqual(dir2,ta)){
cont = GeomAbs_G1;
}
fini = Standard_True;
}
else {fini = Standard_True; }
}
if ( min >= 2 && !fini ) {
d1 = clp1.D2();
d2 = clp2.D2();
if(d1.IsEqual(d2,tl,ta)){
cont = GeomAbs_C2;
}
}
return cont;
}
//=======================================================================
//function : Continuity
//purpose :
//=======================================================================
GeomAbs_Shape GeomLProp::Continuity(const Handle(Geom_Curve)& C1,
const Handle(Geom_Curve)& C2,
const Standard_Real u1,
const Standard_Real u2,
const Standard_Boolean r1,
const Standard_Boolean r2)
{
return Continuity(C1,C2,u1,u2,r1,r2,
Precision::Confusion(),Precision::Angular());
}
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