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// File: GeomAPI_ProjectPointOnCurve.cxx
// Created: Thu Mar 17 11:14:31 1994
// Author: Bruno DUMORTIER
// <dub@fuegox>
#include <GeomAPI_ProjectPointOnCurve.ixx>
#include <GeomAdaptor_Curve.hxx>
//=======================================================================
//function : GeomAPI_ProjectPointOnCurve
//purpose :
//=======================================================================
GeomAPI_ProjectPointOnCurve::GeomAPI_ProjectPointOnCurve()
{
myIsDone = Standard_False;
}
//=======================================================================
//function : GeomAPI_ProjectPointOnCurve
//purpose :
//=======================================================================
GeomAPI_ProjectPointOnCurve::GeomAPI_ProjectPointOnCurve
(const gp_Pnt& P,
const Handle(Geom_Curve)& Curve)
{
Init(P,Curve);
}
//=======================================================================
//function : GeomAPI_ProjectPointOnCurve
//purpose :
//=======================================================================
GeomAPI_ProjectPointOnCurve::GeomAPI_ProjectPointOnCurve
(const gp_Pnt& P,
const Handle(Geom_Curve)& Curve,
const Standard_Real Umin,
const Standard_Real Usup)
{
Init(P,Curve,Umin,Usup);
}
//=======================================================================
//function : Init
//purpose :
//=======================================================================
void GeomAPI_ProjectPointOnCurve::Init
(const gp_Pnt& P,
const Handle(Geom_Curve)& Curve)
{
myC.Load(Curve);
/*
Extrema_ExtPC theExtPC(P, myC);
myExtPC = theExtPC;
*/
myExtPC.Initialize(myC, myC.FirstParameter(), myC.LastParameter());
myExtPC.Perform(P);
myIsDone = myExtPC.IsDone() && ( myExtPC.NbExt() > 0);
if ( myIsDone) {
// evaluate the lower distance and its index;
Standard_Real Dist2, Dist2Min = myExtPC.SquareDistance(1);
myIndex = 1;
for ( Standard_Integer i = 2; i <= myExtPC.NbExt(); i++) {
Dist2 = myExtPC.SquareDistance(i);
if ( Dist2 < Dist2Min) {
Dist2Min = Dist2;
myIndex = i;
}
}
}
}
//=======================================================================
//function : Init
//purpose :
//=======================================================================
void GeomAPI_ProjectPointOnCurve::Init(const gp_Pnt& P,
const Handle(Geom_Curve)& Curve,
const Standard_Real Umin,
const Standard_Real Usup )
{
myC.Load(Curve,Umin,Usup);
/*
Extrema_ExtPC theExtPC(P, myC);
myExtPC = theExtPC;
*/
myExtPC.Initialize(myC, myC.FirstParameter(), myC.LastParameter());
myExtPC.Perform(P);
myIsDone = myExtPC.IsDone() && ( myExtPC.NbExt() > 0);
if ( myIsDone) {
// evaluate the lower distance and its index;
Standard_Real Dist2, Dist2Min = myExtPC.SquareDistance(1);
myIndex = 1;
for ( Standard_Integer i = 2; i <= myExtPC.NbExt(); i++) {
Dist2 = myExtPC.SquareDistance(i);
if ( Dist2 < Dist2Min) {
Dist2Min = Dist2;
myIndex = i;
}
}
}
}
//modified by NIZNHY-PKV Wed Apr 3 17:48:51 2002f
//=======================================================================
//function : Init
//purpose :
//=======================================================================
void GeomAPI_ProjectPointOnCurve::Init (const Handle(Geom_Curve)& Curve,
const Standard_Real Umin,
const Standard_Real Usup )
{
myC.Load(Curve,Umin,Usup);
//myExtPC = Extrema_ExtPC(P, myC);
myExtPC.Initialize(myC, Umin, Usup);
myIsDone = Standard_False;
}
//=======================================================================
//function : Perform
//purpose :
//=======================================================================
void GeomAPI_ProjectPointOnCurve::Perform(const gp_Pnt& aP3D)
{
myExtPC.Perform(aP3D);
myIsDone=myExtPC.IsDone() && ( myExtPC.NbExt() > 0);
if (myIsDone) {
// evaluate the lower distance and its index;
Standard_Real Dist2, Dist2Min = myExtPC.SquareDistance(1);
myIndex = 1;
for ( Standard_Integer i = 2; i <= myExtPC.NbExt(); i++) {
Dist2 = myExtPC.SquareDistance(i);
if ( Dist2 < Dist2Min) {
Dist2Min = Dist2;
myIndex = i;
}
}
}
}
//modified by NIZNHY-PKV Wed Apr 3 17:48:53 2002t
//=======================================================================
//function : NbPoints
//purpose :
//=======================================================================
Standard_Integer GeomAPI_ProjectPointOnCurve::NbPoints() const
{
if ( myIsDone )
return myExtPC.NbExt();
else
return 0;
}
//=======================================================================
//function : Point
//purpose :
//=======================================================================
gp_Pnt GeomAPI_ProjectPointOnCurve::Point(const Standard_Integer Index) const
{
Standard_OutOfRange_Raise_if( Index < 1 || Index > NbPoints(),
"GeomAPI_ProjectPointOnCurve::Point");
return (myExtPC.Point(Index)).Value();
}
//=======================================================================
//function : Parameter
//purpose :
//=======================================================================
Standard_Real GeomAPI_ProjectPointOnCurve::Parameter
(const Standard_Integer Index) const
{
Standard_OutOfRange_Raise_if( Index < 1 || Index > NbPoints(),
"GeomAPI_ProjectPointOnCurve::Parameter");
return (myExtPC.Point(Index)).Parameter();
}
//=======================================================================
//function : Parameter
//purpose :
//=======================================================================
void GeomAPI_ProjectPointOnCurve::Parameter
(const Standard_Integer Index,
Standard_Real& U ) const
{
Standard_OutOfRange_Raise_if( Index < 1 || Index > NbPoints(),
"GeomAPI_ProjectPointOnCurve::Parameter");
U = (myExtPC.Point(Index)).Parameter();
}
//=======================================================================
//function : Distance
//purpose :
//=======================================================================
Standard_Real GeomAPI_ProjectPointOnCurve::Distance
(const Standard_Integer Index) const
{
Standard_OutOfRange_Raise_if( Index < 1 || Index > NbPoints(),
"GeomAPI_ProjectPointOnCurve::Distance");
return sqrt (myExtPC.SquareDistance(Index));
}
//=======================================================================
//function : NearestPoint
//purpose :
//=======================================================================
gp_Pnt GeomAPI_ProjectPointOnCurve::NearestPoint() const
{
StdFail_NotDone_Raise_if
( !myIsDone, "GeomAPI_ProjectPointOnCurve::NearestPoint");
return (myExtPC.Point(myIndex)).Value();
}
//=======================================================================
//function : Standard_Integer
//purpose :
//=======================================================================
GeomAPI_ProjectPointOnCurve::operator Standard_Integer() const
{
return NbPoints();
}
//=======================================================================
//function : gp_Pnt
//purpose :
//=======================================================================
GeomAPI_ProjectPointOnCurve::operator gp_Pnt() const
{
return NearestPoint();
}
//=======================================================================
//function : LowerDistanceParameter
//purpose :
//=======================================================================
Standard_Real GeomAPI_ProjectPointOnCurve::LowerDistanceParameter() const
{
StdFail_NotDone_Raise_if
( !myIsDone, "GeomAPI_ProjectPointOnCurve::LowerDistanceParameter");
return (myExtPC.Point(myIndex)).Parameter();
}
//=======================================================================
//function : LowerDistance
//purpose :
//=======================================================================
Standard_Real GeomAPI_ProjectPointOnCurve::LowerDistance() const
{
StdFail_NotDone_Raise_if
( !myIsDone, "GeomAPI_ProjectPointOnCurve::LowerDistance");
return sqrt (myExtPC.SquareDistance(myIndex));
}
//=======================================================================
//function : operator
//purpose :
//=======================================================================
GeomAPI_ProjectPointOnCurve::operator Standard_Real() const
{
return LowerDistance();
}
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