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// File: ApproxInt_PrmPrmSvSurfaces.gxx
// Created: Wed Mar 17 12:42:28 1993
// Author: Laurent BUCHARD
// <lbr@topsn3>
#define TOLTANGENCY 0.0000000001
#include <TColStd_Array1OfReal.hxx>
#include <math_FunctionSetRoot.hxx>
#define Debug(expr) cout<<" expr :"<<expr;
#define MySurf1 MyIntersectionOn2S.Function().AuxillarSurface1()
#define MySurf2 MyIntersectionOn2S.Function().AuxillarSurface2()
//--------------------------------------------------------------------------------
ApproxInt_PrmPrmSvSurfaces::ApproxInt_PrmPrmSvSurfaces( const ThePSurface& Surf1
,const ThePSurface& Surf2):
MyHasBeenComputed(Standard_False),
MyHasBeenComputedbis(Standard_False),
MyIntersectionOn2S(Surf1,Surf2,TOLTANGENCY)
{
}
//--------------------------------------------------------------------------------
Standard_Boolean ApproxInt_PrmPrmSvSurfaces::Compute( Standard_Real& u1
,Standard_Real& v1
,Standard_Real& u2
,Standard_Real& v2
,gp_Pnt& P
,gp_Vec& Tg
,gp_Vec2d& Tguv1
,gp_Vec2d& Tguv2) {
Standard_Real tu1=u1;
Standard_Real tu2=u2;
Standard_Real tv1=v1;
Standard_Real tv2=v2;
if(MyHasBeenComputed) {
if( (MyParOnS1.X()==u1)&&(MyParOnS1.Y()==v1)
&&(MyParOnS2.X()==u2)&&(MyParOnS2.Y()==v2)) {
return(MyIsTangent);
}
else if(MyHasBeenComputedbis == Standard_False) {
MyTgbis = MyTg;
MyTguv1bis = MyTguv1;
MyTguv2bis = MyTguv2;
MyPntbis = MyPnt;
MyParOnS1bis = MyParOnS1;
MyParOnS2bis = MyParOnS2;
MyIsTangentbis = MyIsTangent;
MyHasBeenComputedbis = MyHasBeenComputed;
}
}
if(MyHasBeenComputedbis) {
if( (MyParOnS1bis.X()==u1)&&(MyParOnS1bis.Y()==v1)
&&(MyParOnS2bis.X()==u2)&&(MyParOnS2bis.Y()==v2)) {
gp_Vec TV(MyTg);
gp_Vec2d TV1(MyTguv1);
gp_Vec2d TV2(MyTguv2);
gp_Pnt TP(MyPnt);
gp_Pnt2d TP1(MyParOnS1);
gp_Pnt2d TP2(MyParOnS2);
Standard_Boolean TB=MyIsTangent;
MyTg = MyTgbis;
MyTguv1 = MyTguv1bis;
MyTguv2 = MyTguv2bis;
MyPnt = MyPntbis;
MyParOnS1 = MyParOnS1bis;
MyParOnS2 = MyParOnS2bis;
MyIsTangent = MyIsTangentbis;
MyTgbis = TV;
MyTguv1bis = TV1;
MyTguv2bis = TV2;
MyPntbis = TP;
MyParOnS1bis = TP1;
MyParOnS2bis = TP2;
MyIsTangentbis = TB;
return(MyIsTangent);
}
}
MyIsTangent = Standard_True;
static TColStd_Array1OfReal Param(1,4);
Param(1) = u1; Param(2) = v1;
Param(3) = u2; Param(4) = v2;
math_FunctionSetRoot Rsnld(MyIntersectionOn2S.Function());
MyIntersectionOn2S.Perform(Param,Rsnld);
if (!MyIntersectionOn2S.IsDone()) {
MyHasBeenComputed = MyHasBeenComputedbis = Standard_False;
return(Standard_False);
}
if (MyIntersectionOn2S.IsEmpty()) {
MyIsTangent=Standard_False;
//cout<<"\n----- Parametree Parametree : IsEmpty ds Compute "<<endl;
//Debug(u1); Debug(u2); Debug(v1); Debug(v2); cout<<endl;
MyHasBeenComputed = MyHasBeenComputedbis = Standard_False;
return(Standard_False);
}
MyHasBeenComputed = Standard_True;
MyPnt = P = MyIntersectionOn2S.Point().Value();
MyIntersectionOn2S.Point().Parameters(u1,v1,u2,v2);
MyParOnS1.SetCoord(tu1,tv1);
MyParOnS2.SetCoord(tu2,tv2);
if(MyIntersectionOn2S.IsTangent()) {
MyIsTangent=Standard_False;
MyHasBeenComputed = MyHasBeenComputedbis = Standard_False;
return(Standard_False);
}
MyTg = Tg = MyIntersectionOn2S.Direction();
MyTguv1 = Tguv1 = MyIntersectionOn2S.DirectionOnS1();
MyTguv2 = Tguv2 = MyIntersectionOn2S.DirectionOnS2();
//----------------------------------------------------------------------
//-- Si ( Tg ) TU et TV sont normes
//--
//-- On a Tg = DeltaU * TU + DeltaV * TV
//--
//-- soit : Tg.TU = DeltaU TU.TU + DeltaV TU.TV
//-- Tg.TV = DeltaU TV.TU + DeltaV TV.TV
//--
//-- Donc :
//--
//-- Tg.TU TV.TV - Tg.TV * TU.TV
//-- DeltaU = -------------------------------
//-- TU.TU TV.TV - (TU.TV)**2
//--
//-- Tg.TV TU.TU - Tg.TU * TU.TV
//-- DeltaV = -------------------------------
//-- TU.TU TV.TV - (TU.TV)**2
//--
//--
Tg.Normalize(); MyTg = Tg;
Standard_Real DeltaU,DeltaV;
gp_Vec TU,TV;
gp_Pnt Pbid;
Standard_Real TUTV,TgTU,TgTV,TUTU,TVTV,DIS;
//------------------------------------------------------------
//-- Calcul de Tguv1
//--
ThePSurfaceTool::D1(MySurf1,u1,v1,Pbid,TU,TV);
TUTU = TU.Dot(TU);
TVTV = TV.Dot(TV);
TUTV = TU.Dot(TV);
TgTU = Tg.Dot(TU);
TgTV = Tg.Dot(TV);
DIS = TUTU * TVTV - TUTV * TUTV;
DeltaU = (TgTU * TVTV - TgTV * TUTV ) / DIS ;
DeltaV = (TgTV * TUTU - TgTU * TUTV ) / DIS ;
Tguv1.SetCoord(DeltaU,DeltaV); MyTguv1 = Tguv1;
//------------------------------------------------------------
//-- Calcul de Tguv2
//--
ThePSurfaceTool::D1(MySurf2,u2,v2,Pbid,TU,TV);
TUTU = TU.Dot(TU);
TVTV = TV.Dot(TV);
TUTV = TU.Dot(TV);
TgTU = Tg.Dot(TU);
TgTV = Tg.Dot(TV);
DIS = TUTU * TVTV - TUTV * TUTV;
DeltaU = (TgTU * TVTV - TgTV * TUTV ) / DIS ;
DeltaV = (TgTV * TUTU - TgTU * TUTV ) / DIS ;
Tguv2.SetCoord(DeltaU,DeltaV); MyTguv2 = Tguv2;
return(Standard_True);
}
//--------------------------------------------------------------------------------
void ApproxInt_PrmPrmSvSurfaces::Pnt(const Standard_Real u1,
const Standard_Real v1,
const Standard_Real u2,
const Standard_Real v2,
gp_Pnt& P) {
gp_Pnt aP;
gp_Vec aT;
gp_Vec2d aTS1,aTS2;
Standard_Real tu1=u1;
Standard_Real tu2=u2;
Standard_Real tv1=v1;
Standard_Real tv2=v2;
this->Compute(tu1,tv1,tu2,tv2,aP,aT,aTS1,aTS2);
P=MyPnt;
}
//--------------------------------------------------------------------------------
Standard_Boolean ApproxInt_PrmPrmSvSurfaces::Tangency(const Standard_Real u1,
const Standard_Real v1,
const Standard_Real u2,
const Standard_Real v2,
gp_Vec& T) {
gp_Pnt aP;
gp_Vec aT;
gp_Vec2d aTS1,aTS2;
Standard_Real tu1=u1;
Standard_Real tu2=u2;
Standard_Real tv1=v1;
Standard_Real tv2=v2;
Standard_Boolean t=this->Compute(tu1,tv1,tu2,tv2,aP,aT,aTS1,aTS2);
T=MyTg;
return(t);
}
//--------------------------------------------------------------------------------
Standard_Boolean ApproxInt_PrmPrmSvSurfaces::TangencyOnSurf1(const Standard_Real u1,
const Standard_Real v1,
const Standard_Real u2,
const Standard_Real v2,
gp_Vec2d& T) {
gp_Pnt aP;
gp_Vec aT;
gp_Vec2d aTS1,aTS2;
Standard_Real tu1=u1;
Standard_Real tu2=u2;
Standard_Real tv1=v1;
Standard_Real tv2=v2;
Standard_Boolean t=this->Compute(tu1,tv1,tu2,tv2,aP,aT,aTS1,aTS2);
T=MyTguv1;
return(t);
}
//--------------------------------------------------------------------------------
Standard_Boolean ApproxInt_PrmPrmSvSurfaces::TangencyOnSurf2(const Standard_Real u1,
const Standard_Real v1,
const Standard_Real u2,
const Standard_Real v2,
gp_Vec2d& T) {
gp_Pnt aP;
gp_Vec aT;
gp_Vec2d aTS1,aTS2;
Standard_Real tu1=u1;
Standard_Real tu2=u2;
Standard_Real tv1=v1;
Standard_Real tv2=v2;
Standard_Boolean t=this->Compute(tu1,tv1,tu2,tv2,aP,aT,aTS1,aTS2);
T=MyTguv2;
return(t);
}
//--------------------------------------------------------------------------------
#if 0
//------------------------------------------------------------
//-- Calcul de Tguv1
//--
ThePSurfaceTool::D1(MySurf1,u1,v1,P,TU,TV);
TUTV = TU.Dot(TV);
TgTU = Tg.Dot(TU);
TgTV = Tg.Dot(TV);
UmTUTV2 = 1.0 - TUTV * TUTV;
DeltaU = (TgTU - TgTV * TUTV ) / UmTUTV2 ;
DeltaV = (TgTV - TgTU * TUTV ) / UmTUTV2 ;
Delta = 1.0 / Sqrt(DeltaU * DeltaU + DeltaV * DeltaV);
Tguv1.Multiplied(Delta); MyTguv1 = Tguv1;
//------------------------------------------------------------
//-- Calcul de Tguv2
//--
ThePSurfaceTool::D1(MySurf2,u2,v2,P,TU,TV);
TUTV = TU.Dot(TV);
TgTU = Tg.Dot(TU);
TgTV = Tg.Dot(TV);
UmTUTV2 = 1.0 - TUTV * TUTV;
DeltaU = (TgTU - TgTV * TUTV ) / UmTUTV2 ;
DeltaV = (TgTV - TgTU * TUTV ) / UmTUTV2 ;
Delta = 1.0 / Sqrt(DeltaU * DeltaU + DeltaV * DeltaV);
Tguv2.Multiplied(Delta); MyTguv2 = Tguv2;
return(Standard_True);
}
#endif
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