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// File: Extrema_GenExtSS.cxx
// Created: Tue Jul 18 08:21:34 1995
// Author: Modelistation
// <model@metrox>
#include <Extrema_GenExtSS.ixx>
#include <math_Vector.hxx>
#include <math_FunctionSetRoot.hxx>
//=======================================================================
//function : Extrema_GenExtSS
//purpose :
//=======================================================================
Extrema_GenExtSS::Extrema_GenExtSS()
{
myDone = Standard_False;
myInit = Standard_False;
}
//=======================================================================
//function : Extrema_GenExtSS
//purpose :
//=======================================================================
Extrema_GenExtSS::Extrema_GenExtSS(const Adaptor3d_Surface& S1,
const Adaptor3d_Surface& S2,
const Standard_Integer NbU,
const Standard_Integer NbV,
const Standard_Real Tol1,
const Standard_Real Tol2) : myF(S1,S2)
{
Initialize(S2, NbU, NbV, Tol2);
Perform(S1, Tol1);
}
//=======================================================================
//function : Extrema_GenExtSS
//purpose :
//=======================================================================
Extrema_GenExtSS::Extrema_GenExtSS(const Adaptor3d_Surface& S1,
const Adaptor3d_Surface& S2,
const Standard_Integer NbU,
const Standard_Integer NbV,
const Standard_Real U1min,
const Standard_Real U1sup,
const Standard_Real V1min,
const Standard_Real V1sup,
const Standard_Real U2min,
const Standard_Real U2sup,
const Standard_Real V2min,
const Standard_Real V2sup,
const Standard_Real Tol1,
const Standard_Real Tol2): myF(S1, S2)
{
Initialize(S2, NbU, NbV, U2min,U2sup,V2min,V2sup,Tol2);
Perform(S1, U1min,U1sup,V1min,V1sup,Tol1);
}
//=======================================================================
//function : Initialize
//purpose :
//=======================================================================
void Extrema_GenExtSS::Initialize(const Adaptor3d_Surface& S2,
const Standard_Integer NbU,
const Standard_Integer NbV,
const Standard_Real Tol2)
{
myu2min = S2.FirstUParameter();
myu2sup = S2.LastUParameter();
myv2min = S2.FirstVParameter();
myv2sup = S2.LastVParameter();
Initialize(S2,NbU,NbV,myu2min,myu2sup,myv2min,myv2sup,Tol2);
}
//=======================================================================
//function : Initialize
//purpose :
//=======================================================================
void Extrema_GenExtSS::Initialize(const Adaptor3d_Surface& S2,
const Standard_Integer NbU,
const Standard_Integer NbV,
const Standard_Real U2min,
const Standard_Real U2sup,
const Standard_Real V2min,
const Standard_Real V2sup,
const Standard_Real Tol2)
{
myS2 = (Adaptor3d_SurfacePtr)&S2;
mypoints1 = new TColgp_HArray2OfPnt(0,NbU+1,0,NbV+1);
mypoints2 = new TColgp_HArray2OfPnt(0,NbU+1,0,NbV+1);
myusample = NbU;
myvsample = NbV;
myu2min = U2min;
myu2sup = U2sup;
myv2min = V2min;
myv2sup = V2sup;
mytol2 = Tol2;
// Parametrage de l echantillon sur S2
Standard_Real PasU = myu2sup - myu2min;
Standard_Real PasV = myv2sup - myv2min;
Standard_Real U0 = PasU / myusample / 100.;
Standard_Real V0 = PasV / myvsample / 100.;
gp_Pnt P1;
PasU = (PasU - U0) / (myusample - 1);
PasV = (PasV - V0) / (myvsample - 1);
U0 = myu2min + U0/2.;
V0 = myv2min + V0/2.;
// Calcul des distances
Standard_Integer NoU, NoV;
Standard_Real U, V;
for ( NoU = 1, U = U0; NoU <= myusample; NoU++, U += PasU) {
for ( NoV = 1, V = V0; NoV <= myvsample; NoV++, V += PasV) {
P1 = myS2->Value(U, V);
mypoints2->SetValue(NoU,NoV,P1);
}
}
}
//=======================================================================
//function : Perform
//purpose :
//=======================================================================
void Extrema_GenExtSS::Perform(const Adaptor3d_Surface& S1,
const Standard_Real Tol1)
{
myu1min = S1.FirstUParameter();
myu1sup = S1.LastUParameter();
myv1min = S1.FirstVParameter();
myv1sup = S1.LastVParameter();
Perform(S1, myu1min, myu1sup,myv1min,myv1sup,Tol1);
}
//=======================================================================
//function : Perform
//purpose :
//=======================================================================
void Extrema_GenExtSS::Perform(const Adaptor3d_Surface& S1,
const Standard_Real U1min,
const Standard_Real U1sup,
const Standard_Real V1min,
const Standard_Real V1sup,
const Standard_Real Tol1)
{
myF.Initialize(S1,*myS2);
myu1min = U1min;
myu1sup = U1sup;
myv1min = V1min;
myv1sup = V1sup;
mytol1 = Tol1;
Standard_Real U1, V1, U2, V2;
Standard_Integer NoU1, NoV1, NoU2, NoV2;
gp_Pnt P1, P2;
// Parametrage de l echantillon sur S1
Standard_Real PasU1 = myu1sup - myu1min;
Standard_Real PasV1 = myv1sup - myv1min;
Standard_Real U10 = PasU1 / myusample / 100.;
Standard_Real V10 = PasV1 / myvsample / 100.;
PasU1 = (PasU1 - U10) / (myusample - 1);
PasV1 = (PasV1 - V10) / (myvsample - 1);
U10 = myu1min + U10/2.;
V10 = myv1min + V10/2.;
Standard_Real PasU2 = myu2sup - myu2min;
Standard_Real PasV2 = myv2sup - myv2min;
Standard_Real U20 = PasU2 / myusample / 100.;
Standard_Real V20 = PasV2 / myvsample / 100.;
PasU2 = (PasU2 - U20) / (myusample - 1);
PasV2 = (PasV2 - V20) / (myvsample - 1);
U20 = myu2min + U20/2.;
V20 = myv2min + V20/2.;
// Calcul des distances
for ( NoU1 = 1, U1 = U10; NoU1 <= myusample; NoU1++, U1 += PasU1) {
for ( NoV1 = 1, V1 = V10; NoV1 <= myvsample; NoV1++, V1 += PasV1) {
P1 = S1.Value(U1, V1);
mypoints1->SetValue(NoU1,NoV1,P1);
}
}
/*
b- Calcul des minima:
-----------------
b.a) Initialisations:
*/
math_Vector Tol(1, 4);
Tol(1) = mytol1;
Tol(2) = mytol1;
Tol(3) = mytol2;
Tol(4) = mytol2;
math_Vector UV(1,4), UVinf(1,4), UVsup(1,4);
UVinf(1) = myu1min;
UVinf(2) = myv1min;
UVinf(3) = myu2min;
UVinf(4) = myv2min;
UVsup(1) = myu1sup;
UVsup(2) = myv1sup;
UVsup(3) = myu2sup;
UVsup(4) = myv2sup;
Standard_Real distmin = RealLast(), distmax = 0.0, TheDist;
Standard_Integer N1Umin=0,N1Vmin=0,N2Umin=0,N2Vmin=0;
gp_Pnt PP1min, PP2min;
Standard_Integer N1Umax=0,N1Vmax=0,N2Umax=0,N2Vmax=0;
gp_Pnt PP1max, PP2max;
for ( NoU1 = 1, U1 = U10; NoU1 <= myusample; NoU1++, U1 += PasU1) {
for ( NoV1 = 1, V1 = V10; NoV1 <= myvsample; NoV1++, V1 += PasV1) {
P1 = mypoints1->Value(NoU1, NoV1);
for ( NoU2 = 1, U2 = U20; NoU2 <= myusample; NoU2++, U2 += PasU2) {
for ( NoV2 = 1, V2 = V20; NoV2 <= myvsample; NoV2++, V2 += PasV2) {
P2 = mypoints2->Value(NoU2, NoV2);
TheDist = P1.SquareDistance(P2);
if (TheDist < distmin) {
distmin = TheDist;
N1Umin = NoU1;
N1Vmin = NoV1;
N2Umin = NoU2;
N2Vmin = NoV2;
PP1min = P1;
PP2min = P2;
}
if (TheDist > distmax) {
distmax = TheDist;
N1Umax = NoU1;
N1Vmax = NoV1;
N2Umax = NoU2;
N2Vmax = NoV2;
PP1max = P1;
PP2max = P2;
}
}
}
}
}
UV(1) = U10 + (N1Umin - 1) * PasU1;
UV(2) = V10 + (N1Vmin - 1) * PasV1;
UV(3) = U20 + (N2Umin - 1) * PasU2;
UV(4) = V20 + (N2Vmin - 1) * PasV2;
math_FunctionSetRoot SR1 (myF,UV,Tol,UVinf,UVsup);
UV(1) = U10 + (N1Umax - 1) * PasU1;
UV(2) = V10 + (N1Vmax - 1) * PasV1;
UV(3) = U20 + (N2Umax - 1) * PasU2;
UV(4) = V20 + (N2Vmax - 1) * PasV2;
math_FunctionSetRoot SR2 (myF,UV,Tol,UVinf,UVsup);
myDone = Standard_True;
}
//=======================================================================
//function : IsDone
//purpose :
//=======================================================================
Standard_Boolean Extrema_GenExtSS::IsDone() const
{
return myDone;
}
//=======================================================================
//function : NbExt
//purpose :
//=======================================================================
Standard_Integer Extrema_GenExtSS::NbExt() const
{
if (!IsDone()) { StdFail_NotDone::Raise(); }
return myF.NbExt();
}
//=======================================================================
//function : Value
//purpose :
//=======================================================================
Standard_Real Extrema_GenExtSS::SquareDistance(const Standard_Integer N) const
{
if (!IsDone()) { StdFail_NotDone::Raise(); }
return myF.SquareDistance(N);
}
//=======================================================================
//function : PointOnS1
//purpose :
//=======================================================================
Extrema_POnSurf Extrema_GenExtSS::PointOnS1(const Standard_Integer N) const
{
if (!IsDone()) { StdFail_NotDone::Raise(); }
return myF.PointOnS1(N);
}
//=======================================================================
//function : PointOnS2
//purpose :
//=======================================================================
Extrema_POnSurf Extrema_GenExtSS::PointOnS2(const Standard_Integer N) const
{
if (!IsDone()) { StdFail_NotDone::Raise(); }
return myF.PointOnS2(N);
}
//=======================================================================
//function : Bidon
//purpose :
//=======================================================================
Adaptor3d_SurfacePtr Extrema_GenExtSS::Bidon() const
{
return (Adaptor3d_SurfacePtr)0L;
}
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