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// File GccAna_Circ2d3Tan.cxx_7, REG 08/07/91
#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_CircPnt2dBisec.hxx>
#include <GccAna_Pnt2dBisec.hxx>
#include <GccInt_IType.hxx>
#include <GccInt_BCirc.hxx>
#include <GccInt_BLine.hxx>
#include <GccInt_BElips.hxx>
#include <GccInt_BHyper.hxx>
#include <IntAna2d_Conic.hxx>
#include <GccEnt_BadQualifier.hxx>
#include <Precision.hxx>
//=========================================================================
// Creation d un cercle tangent a un cercle et a deux points. +
//=========================================================================
GccAna_Circ2d3Tan::
GccAna_Circ2d3Tan (const GccEnt_QualifiedCirc& Qualified1 ,
const gp_Pnt2d& Point2 ,
const gp_Pnt2d& Point3 ,
const Standard_Real Tolerance ):
cirsol(1,2) ,
qualifier1(1,2) ,
qualifier2(1,2) ,
qualifier3(1,2) ,
TheSame1(1,2) ,
TheSame2(1,2) ,
TheSame3(1,2) ,
pnttg1sol(1,2) ,
pnttg2sol(1,2) ,
pnttg3sol(1,2) ,
par1sol(1,2) ,
par2sol(1,2) ,
par3sol(1,2) ,
pararg1(1,2) ,
pararg2(1,2) ,
pararg3(1,2)
{
gp_Dir2d dirx(1.0,0.0);
Standard_Real Tol = Abs(Tolerance);
WellDone = Standard_False;
NbrSol = 0;
if (!(Qualified1.IsEnclosed() || Qualified1.IsEnclosing() ||
Qualified1.IsOutside() || Qualified1.IsUnqualified())) {
GccEnt_BadQualifier::Raise();
return;
}
//=========================================================================
// Traitement. +
//=========================================================================
gp_Circ2d C1 = Qualified1.Qualified();
Standard_Real R1 = C1.Radius();
gp_Pnt2d center1(C1.Location());
TColStd_Array1OfReal Radius(1,2);
if (Point2.IsEqual(Point3,Precision::Confusion())) {
WellDone = Standard_False;
return ;
}
GccAna_Pnt2dBisec Bis1(Point2,Point3);
GccAna_CircPnt2dBisec Bis2(C1,Point2);
if (Bis1.IsDone() && Bis2.IsDone()) {
Standard_Integer nbsolution2 = Bis2.NbSolutions();
for (Standard_Integer i = 1 ; i <= nbsolution2; i++) {
Handle(GccInt_Bisec) Sol2 = Bis2.ThisSolution(i);
GccInt_IType typ2 = Sol2->ArcType();
gp_Lin2d Sol1(Bis1.ThisSolution());
IntAna2d_AnaIntersection Intp;
if (typ2 == GccInt_Cir) {
Intp.Perform(Sol1,Sol2->Circle());
}
else if (typ2 == GccInt_Lin) {
Intp.Perform(Sol1,Sol2->Line());
}
else if (typ2 == GccInt_Hpr) {
Intp.Perform(Sol1,IntAna2d_Conic(Sol2->Hyperbola()));
}
else if (typ2 == GccInt_Ell) {
Intp.Perform(Sol1,IntAna2d_Conic(Sol2->Ellipse()));
}
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(center1);
Standard_Real dist2 = Center.Distance(Point2);
Standard_Real dist3 = Center.Distance(Point3);
Standard_Integer nbsol1 = 0;
// Standard_Integer nbsol2 = 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) = R1+dist1;
}
else if (Qualified1.IsUnqualified()) {
ok = Standard_True;
nbsol1 = 2;
Radius(1) = Abs(R1-dist1);
Radius(2) = R1+dist1;
}
if (ok) {
ok = Standard_False;
for (Standard_Integer ii = 1 ; ii <= nbsol1 ; ii++) {
//pop if (Abs(dist2-Radius(ii))<=Tol && Abs(dist2-Radius(ii))<=Tol){
if (Abs(dist2-Radius(ii))<=Tol && Abs(dist3-Radius(ii))<=Tol){
nbsol3 = ii;
ok = Standard_True;
}
}
}
if (ok) {
// for (Standard_Integer k = 1 ; k <= nbsol3 ; k++) {
if (NbrSol>=2) break;
NbrSol++;
// cirsol(NbrSol) = gp_Circ2d(gp_Ax2d(Center,dirx),Radius(k));
cirsol(NbrSol) = gp_Circ2d(gp_Ax2d(Center,dirx),Radius(nbsol3));
// ==========================================================
Standard_Real distcc1 = Center.Distance(center1);
if (!Qualified1.IsUnqualified()) {
qualifier1(NbrSol) = Qualified1.Qualifier();
}
else if (Abs(distcc1+Radius(nbsol3)-R1) < Tol) {
qualifier1(NbrSol) = GccEnt_enclosed;
}
else if (Abs(distcc1-R1-Radius(nbsol3)) < Tol) {
qualifier1(NbrSol) = GccEnt_outside;
}
else { qualifier1(NbrSol) = GccEnt_enclosing; }
qualifier2(NbrSol) = GccEnt_noqualifier;
qualifier3(NbrSol) = GccEnt_noqualifier;
if (Center.Distance(center1) <= Tolerance &&
Abs(Radius(nbsol3)-R1) <= Tolerance) {
TheSame1(NbrSol) = 1;
}
else {
TheSame1(NbrSol) = 0;
gp_Dir2d dc(center1.XY()-Center.XY());
pnttg1sol(NbrSol)=gp_Pnt2d(Center.XY()+Radius(nbsol3)*dc.XY());
par1sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol),
pnttg1sol(NbrSol));
pararg1(NbrSol)=ElCLib::Parameter(C1,pnttg1sol(NbrSol));
}
TheSame2(NbrSol) = 0;
pnttg2sol(NbrSol) = Point2;
par2sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol),
pnttg2sol(NbrSol));
pararg2(NbrSol)=0.;
TheSame3(NbrSol) = 0;
pnttg3sol(NbrSol) = Point3;
par3sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol),
pnttg3sol(NbrSol));
pararg3(NbrSol) = 0.;
//}
}
}
}
WellDone = Standard_True;
}
}
}
}
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