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// File GccAna_Circ2d3Tan.cxx_5, REG 08/07/91
// init. de MinRad et MaxRad (PRO15604), JCT 09/10/98
#include <GccAna_Circ2d3Tan.jxx>
#include <ElCLib.hxx>
#include <IntAna2d_AnaIntersection.hxx>
#include <IntAna2d_IntPoint.hxx>
#include <gp_Lin2d.hxx>
#include <gp_Circ2d.hxx>
#include <gp_Dir2d.hxx>
#include <TColStd_Array1OfReal.hxx>
#include <GccAna_CircLin2dBisec.hxx>
#include <GccAna_LinPnt2dBisec.hxx>
#include <GccInt_IType.hxx>
#include <GccInt_BLine.hxx>
#include <GccInt_BParab.hxx>
#include <IntAna2d_Conic.hxx>
#include <GccEnt_BadQualifier.hxx>
//=========================================================================
// Creation d un cercle tangent a un cercle, une droite et un point. +
//=========================================================================
GccAna_Circ2d3Tan::
GccAna_Circ2d3Tan (const GccEnt_QualifiedCirc& Qualified1 ,
const GccEnt_QualifiedLin& Qualified2 ,
const gp_Pnt2d& Point3 ,
const Standard_Real Tolerance ):
//=========================================================================
// Initialisation des champs. +
//=========================================================================
cirsol(1,4) ,
qualifier1(1,4) ,
qualifier2(1,4) ,
qualifier3(1,4) ,
TheSame1(1,4) ,
TheSame2(1,4) ,
TheSame3(1,4) ,
pnttg1sol(1,4) ,
pnttg2sol(1,4) ,
pnttg3sol(1,4) ,
par1sol(1,4) ,
par2sol(1,4) ,
par3sol(1,4) ,
pararg1(1,4) ,
pararg2(1,4) ,
pararg3(1,4)
{
gp_Dir2d dirx(1.0,0.0);
Standard_Real Tol = Abs(Tolerance);
Standard_Real MaxRad = 1e10, MinRad = 1e-6;
WellDone = Standard_False;
NbrSol = 0;
if (!(Qualified1.IsEnclosed() || Qualified1.IsEnclosing() ||
Qualified1.IsOutside() || Qualified1.IsUnqualified()) ||
!(Qualified2.IsEnclosed() ||
Qualified2.IsOutside() || Qualified2.IsUnqualified())) {
GccEnt_BadQualifier::Raise();
return;
}
//=========================================================================
// Traitement. +
//=========================================================================
gp_Circ2d C1(Qualified1.Qualified());
gp_Lin2d L2(Qualified2.Qualified());
Standard_Real R1 = C1.Radius();
gp_Pnt2d center1(C1.Location());
gp_Pnt2d origin2(L2.Location());
gp_Dir2d dir2(L2.Direction());
gp_Dir2d normL2(-dir2.Y(),dir2.X());
TColStd_Array1OfReal Radius(1,2);
GccAna_CircLin2dBisec Bis1(C1,L2);
GccAna_LinPnt2dBisec Bis2(L2,Point3);
if (Bis1.IsDone() && Bis2.IsDone()) {
Standard_Integer nbsolution1 = Bis1.NbSolutions();
for (Standard_Integer i = 1 ; i <= nbsolution1; i++) {
Handle(GccInt_Bisec) Sol1 = Bis1.ThisSolution(i);
Handle(GccInt_Bisec) Sol2 = Bis2.ThisSolution();
GccInt_IType typ1 = Sol1->ArcType();
GccInt_IType typ2 = Sol2->ArcType();
IntAna2d_AnaIntersection Intp;
if (typ1 == GccInt_Lin) {
if (typ2 == GccInt_Lin) {
Intp.Perform(Sol1->Line(),Sol2->Line());
}
else if (typ2 == GccInt_Par) {
Intp.Perform(Sol1->Line(),IntAna2d_Conic(Sol2->Parabola()));
}
}
else if (typ1 == GccInt_Par) {
if (typ2 == GccInt_Lin) {
Intp.Perform(Sol2->Line(),IntAna2d_Conic(Sol1->Parabola()));
}
else if (typ2 == GccInt_Par) {
Intp.Perform(Sol1->Parabola(),IntAna2d_Conic(Sol2->Parabola()));
}
}
if (Intp.IsDone()) {
if (!Intp.IsEmpty()) {
for (Standard_Integer j = 1 ; j <= Intp.NbPoints() ; j++) {
gp_Pnt2d Center(Intp.Point(j).Value());
Standard_Real dist1 = Center.Distance(C1.Location());
Standard_Real dist2 = L2.Distance(Center);
Standard_Real dist3 = Center.Distance(Point3);
Standard_Integer nbsol1 = 0;
Standard_Integer nbsol3 = 0;
Standard_Boolean ok = Standard_False;
if (Qualified1.IsEnclosed()) {
if (dist1-R1 < Tolerance) {
Radius(1) = Abs(R1-dist1);
nbsol1 = 1;
ok = Standard_True;
}
}
else if (Qualified1.IsOutside()) {
if (R1-dist1 < Tolerance) {
Radius(1) = Abs(R1-dist1);
nbsol1 = 1;
ok = Standard_True;
}
}
else if (Qualified1.IsEnclosing()) {
ok = Standard_True;
nbsol1 = 1;
Radius(1) = Abs(R1-dist1);
}
else if (Qualified1.IsUnqualified()) {
ok = Standard_True;
nbsol1 = 2;
Radius(1) = Abs(R1-dist1);
Radius(2) = R1+dist1;
}
if (Qualified2.IsEnclosed() && ok) {
if ((((L2.Location().X()-Center.X())*(-L2.Direction().Y()))+
((L2.Location().Y()-Center.Y())*(L2.Direction().X())))<=0){
for (Standard_Integer ii = 1 ; ii <= nbsol1 ; ii++) {
if (Abs(dist2-Radius(ii)) < Tol) {
ok = Standard_True;
Radius(1) = Radius(ii);
}
}
}
}
else if (Qualified2.IsOutside() && ok) {
if ((((L2.Location().X()-Center.X())*(-L2.Direction().Y()))+
((L2.Location().Y()-Center.Y())*(L2.Direction().X())))>=0){
for (Standard_Integer ii = 1 ; ii <= nbsol1 ; ii++) {
if (Abs(dist2-Radius(ii)) < Tol) {
ok = Standard_True;
Radius(1) = Radius(ii);
}
}
}
}
else if (Qualified2.IsUnqualified() && ok) {
for (Standard_Integer ii = 1 ; ii <= nbsol1 ; ii++) {
if (Abs(dist2-Radius(ii)) < Tol) {
ok = Standard_True;
Radius(1) = Radius(ii);
}
}
}
if (Abs(dist3-Radius(1)) <= Tol && ok) {
ok = Standard_True;
nbsol3 = 1;
}
if (ok) {
for (Standard_Integer k = 1 ; k <= nbsol3 ; k++) {
if (NbrSol==4)
break;
// pop : si le rayon est trop grand ( qu'est trop grand : avoir ) pas de creation
if (Radius(k) > MaxRad) break;
if (Abs(Radius(k)) < MinRad) break;
NbrSol++;
cirsol(NbrSol) = gp_Circ2d(gp_Ax2d(Center,dirx),Radius(k));
// ==========================================================
Standard_Real distcc1 = Center.Distance(center1);
if (!Qualified1.IsUnqualified()) {
qualifier1(NbrSol) = Qualified1.Qualifier();
}
else if (Abs(distcc1+Radius(k)-R1) < Tol) {
qualifier1(NbrSol) = GccEnt_enclosed;
}
else if (Abs(distcc1-R1-Radius(k)) < Tol) {
qualifier1(NbrSol) = GccEnt_outside;
}
else { qualifier1(NbrSol) = GccEnt_enclosing; }
gp_Dir2d dc2(origin2.XY()-Center.XY());
if (!Qualified2.IsUnqualified()) {
qualifier2(NbrSol) = Qualified2.Qualifier();
}
else if (dc2.Dot(normL2) > 0.0) {
qualifier2(NbrSol) = GccEnt_outside;
}
else { qualifier2(NbrSol) = GccEnt_enclosed; }
qualifier3(NbrSol) = GccEnt_noqualifier;
if (Center.Distance(C1.Location()) <= Tolerance &&
Abs(Radius(k)-R1) <= Tolerance) {
TheSame1(NbrSol) = 1;
}
else {
TheSame1(NbrSol) = 0;
// modified by NIZHNY-EAP Mon Nov 1 13:48:21 1999 ___BEGIN___
// gp_Dir2d dc(C1.Location().XY()-Center.XY());
gp_Dir2d dc(Center.XY()-C1.Location().XY());
// modified by NIZHNY-EAP Mon Nov 1 13:48:55 1999 ___END___
pnttg1sol(NbrSol)=gp_Pnt2d(Center.XY()+Radius(k)*dc.XY());
par1sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol),
pnttg1sol(NbrSol));
pararg1(NbrSol)=ElCLib::Parameter(C1,pnttg1sol(NbrSol));
}
TheSame2(NbrSol) = 0;
TheSame3(NbrSol) = 0;
gp_Dir2d dc(L2.Location().XY()-Center.XY());
Standard_Real sign = dc.Dot(gp_Dir2d(-L2.Direction().Y(),
L2.Direction().X()));
dc = gp_Dir2d(sign*gp_XY(-L2.Direction().Y(),
L2.Direction().X()));
pnttg2sol(NbrSol) = gp_Pnt2d(Center.XY()+Radius(k)*dc.XY());
par2sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol),
pnttg2sol(NbrSol));
pararg2(NbrSol)=ElCLib::Parameter(L2,pnttg2sol(NbrSol));
pnttg3sol(NbrSol) = Point3;
par3sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol),
pnttg3sol(NbrSol));
pararg3(NbrSol) = 0.;
}
}
}
}
WellDone = Standard_True;
}
if (NbrSol==4)
break;
}
}
}
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