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// File: GccAna_Circ2d2TanOn_7.cxx
// Created: Thu Jan 2 15:57:15 1992
// Author: Remi GILET
// <reg@topsn3>
#include <GccAna_Circ2d2TanOn.jxx>
#include <ElCLib.hxx>
#include <gp_Dir2d.hxx>
#include <gp_Ax2d.hxx>
#include <IntAna2d_AnaIntersection.hxx>
#include <IntAna2d_IntPoint.hxx>
#include <GccAna_CircLin2dBisec.hxx>
#include <GccInt_IType.hxx>
#include <GccInt_BCirc.hxx>
#include <IntAna2d_Conic.hxx>
#include <TColStd_Array1OfReal.hxx>
#include <GccEnt_BadQualifier.hxx>
GccAna_Circ2d2TanOn::
GccAna_Circ2d2TanOn (const GccEnt_QualifiedCirc& Qualified1 ,
const GccEnt_QualifiedLin& Qualified2 ,
const gp_Circ2d& OnCirc ,
const Standard_Real Tolerance ):
cirsol(1,4) ,
qualifier1(1,4) ,
qualifier2(1,4),
TheSame1(1,4) ,
TheSame2(1,4) ,
pnttg1sol(1,4) ,
pnttg2sol(1,4) ,
pntcen(1,4) ,
par1sol(1,4) ,
par2sol(1,4) ,
pararg1(1,4) ,
pararg2(1,4) ,
parcen3(1,4)
{
TheSame1.Init(0);
TheSame2.Init(0);
WellDone = Standard_False;
NbrSol = 0;
if (!(Qualified1.IsEnclosed() || Qualified1.IsEnclosing() ||
Qualified1.IsOutside() || Qualified1.IsUnqualified()) ||
!(Qualified2.IsEnclosed() ||
Qualified2.IsOutside() || Qualified2.IsUnqualified())) {
GccEnt_BadQualifier::Raise();
return;
}
Standard_Real Radius=0;
gp_Dir2d dirx(1.,0.);
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 dirL2(L2.Direction());
gp_Dir2d normL2(-dirL2.Y(),dirL2.X());
//=========================================================================
// Traitement des cas limites. +
//=========================================================================
Standard_Real Tol = Abs(Tolerance);
TColStd_Array1OfReal Rradius(1,2);
Standard_Integer nbsol1 = 1;
// Standard_Integer nbsol2 = 0;
Standard_Real Ron = OnCirc.Radius();
Standard_Real distcco = OnCirc.Location().Distance(center1);
gp_Dir2d dircc(OnCirc.Location().XY()-center1.XY());
gp_Pnt2d pinterm(center1.XY()+(distcco-Ron)*dircc.XY());
Standard_Real distpl2 =L2.Distance(pinterm);
Standard_Real distcc1 =pinterm.Distance(center1);
Standard_Real d1 = Abs(distpl2-Abs(distcc1-R1));
Standard_Real d2 = Abs(distpl2-(distcc1+R1));
if ( d1 > Tol || d2 > Tol ) {
pinterm = gp_Pnt2d(center1.XY()+(distcco-Ron)*dircc.XY());
if ( d1 > Tol || d2 > Tol ) {
nbsol1 = 0;
}
}
if (nbsol1 > 0) {
if (Qualified1.IsEnclosed() || Qualified1.IsOutside()) {
nbsol1 = 1;
Rradius(1) = Abs(distcc1-R1);
}
else if (Qualified1.IsEnclosing()) {
nbsol1 = 1;
Rradius(1) = R1+distcc1;
}
else if (Qualified1.IsUnqualified()) {
nbsol1 = 2;
Rradius(1) = Abs(distcc1-R1);
Rradius(2) = R1+distcc1;
}
gp_Dir2d dirbid(origin2.XY()-pinterm.XY());
gp_Dir2d normal(-dirL2.Y(),dirL2.X());
if (Qualified1.IsEnclosed() && dirbid.Dot(normal) < 0.) {
nbsol1 = 0;
}
else if (Qualified1.IsOutside() && dirbid.Dot(normal) < 0.) {
nbsol1 = 0;
}
for (Standard_Integer i = 1 ; i <= nbsol1 ; i++) {
if (Abs(Rradius(i)-distpl2) <= Tol) {
WellDone = Standard_True;
NbrSol++;
cirsol(NbrSol) = gp_Circ2d(gp_Ax2d(pinterm,dirx),Rradius(i));
// ===========================================================
gp_Dir2d dc1(center1.XY()-pinterm.XY());
gp_Dir2d dc2(origin2.XY()-pinterm.XY());
distcc1 = pinterm.Distance(center1);
if (!Qualified1.IsUnqualified()) {
qualifier1(NbrSol) = Qualified1.Qualifier();
}
else if (Abs(distcc1+Rradius(i)-R1) < Tol) {
qualifier1(NbrSol) = GccEnt_enclosed;
}
else if (Abs(distcc1-R1-Rradius(i)) < Tol) {
qualifier1(NbrSol) = GccEnt_outside;
}
else { qualifier1(NbrSol) = GccEnt_enclosing; }
if (!Qualified2.IsUnqualified()) {
qualifier2(NbrSol) = Qualified2.Qualifier();
}
else if (dc2.Dot(normL2) > 0.0) {
qualifier2(NbrSol) = GccEnt_outside;
}
else { qualifier2(NbrSol) = GccEnt_enclosed; }
Standard_Real sign = dc2.Dot(gp_Dir2d(-dirL2.Y(),dirL2.X()));
dc2 = gp_Dir2d(sign*gp_XY(-dirL2.Y(),dirL2.X()));
pnttg1sol(NbrSol) = gp_Pnt2d(pinterm.XY()+Rradius(i)*dc1.XY());
pnttg2sol(NbrSol) = gp_Pnt2d(pinterm.XY()+Rradius(i)*dc2.XY());
par1sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol),pnttg1sol(NbrSol));
pararg1(NbrSol)=ElCLib::Parameter(C1,pnttg1sol(NbrSol));
par2sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol),pnttg2sol(NbrSol));
pararg2(NbrSol)=ElCLib::Parameter(L2,pnttg2sol(NbrSol));
parcen3(NbrSol)=ElCLib::Parameter(OnCirc,pntcen(NbrSol));
}
}
if (WellDone) { return; }
}
//=========================================================================
// Cas general. +
//=========================================================================
GccAna_CircLin2dBisec Bis(C1,L2);
if (Bis.IsDone()) {
Standard_Integer nbsolution = Bis.NbSolutions();
for (Standard_Integer i = 1 ; i <= nbsolution; i++) {
Handle(GccInt_Bisec) Sol = Bis.ThisSolution(i);
GccInt_IType type = Sol->ArcType();
IntAna2d_AnaIntersection Intp;
if (type == GccInt_Lin) {
Intp.Perform(Sol->Line(),OnCirc);
}
else if (type == GccInt_Par) {
Intp.Perform(OnCirc,IntAna2d_Conic(Sol->Parabola()));
}
if (Intp.IsDone()) {
if ((!Intp.IsEmpty())&&(!Intp.ParallelElements())&&
(!Intp.IdenticalElements())) {
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 = L2.Distance(Center);
// Standard_Integer nbsol = 1;
Standard_Boolean ok = Standard_False;
if (Qualified1.IsEnclosed()) {
if (dist1-R1 < Tolerance) {
if (Abs(Abs(R1-dist1)-dist2)<Tolerance) { ok=Standard_True; }
}
}
else if (Qualified1.IsOutside()) {
if (R1-dist1 < Tolerance) {
if (Abs(Abs(R1-dist1)-dist2)<Tolerance) { ok=Standard_True; }
}
}
else if (Qualified1.IsEnclosing() || Qualified1.IsUnqualified()) {
ok = Standard_True;
}
if (Qualified2.IsEnclosed() && ok) {
if ((((origin2.X()-Center.X())*(-dirL2.Y()))+
((origin2.Y()-Center.Y())*(dirL2.X())))<=0){
ok = Standard_True;
Radius = dist2;
}
}
else if (Qualified2.IsOutside() && ok) {
if ((((origin2.X()-Center.X())*(-dirL2.Y()))+
((origin2.Y()-Center.Y())*(dirL2.X())))>=0){
ok = Standard_True;
Radius = dist2;
}
}
else if (Qualified2.IsUnqualified() && ok) {
ok = Standard_True;
Radius = dist2;
}
if (ok) {
NbrSol++;
cirsol(NbrSol) = gp_Circ2d(gp_Ax2d(Center,dirx),Radius);
// =======================================================
gp_Dir2d dc2(origin2.XY()-Center.XY());
distcc1 = Center.Distance(center1);
if (!Qualified1.IsUnqualified()) {
qualifier1(NbrSol) = Qualified1.Qualifier();
}
else if (Abs(distcc1+Radius-R1) < Tol) {
qualifier1(NbrSol) = GccEnt_enclosed;
}
else if (Abs(distcc1-R1-Radius) < Tol) {
qualifier1(NbrSol) = GccEnt_outside;
}
else { qualifier1(NbrSol) = GccEnt_enclosing; }
if (!Qualified2.IsUnqualified()) {
qualifier2(NbrSol) = Qualified2.Qualifier();
}
else if (dc2.Dot(normL2) > 0.0) {
qualifier2(NbrSol) = GccEnt_outside;
}
else { qualifier2(NbrSol) = GccEnt_enclosed; }
if (Center.Distance(center1) <= Tolerance &&
Abs(Radius-C1.Radius()) <= Tolerance) {
TheSame1(NbrSol) = 1;
}
else {
TheSame1(NbrSol) = 0;
gp_Dir2d dc1(center1.XY()-Center.XY());
pnttg1sol(NbrSol) = gp_Pnt2d(Center.XY()+Radius*dc1.XY());
par1sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol),
pnttg1sol(NbrSol));
pararg1(NbrSol)=ElCLib::Parameter(C1,pnttg1sol(NbrSol));
}
TheSame2(NbrSol) = 0;
Standard_Real sign = dc2.Dot(gp_Dir2d(normL2.XY()));
dc2 = gp_Dir2d(sign*gp_XY(normL2.XY()));
pnttg2sol(NbrSol) = gp_Pnt2d(Center.XY()+Radius*dc2.XY());
par2sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol),
pnttg2sol(NbrSol));
pararg2(NbrSol)=ElCLib::Parameter(L2,pnttg2sol(NbrSol));
pntcen(NbrSol) = Center;
parcen3(NbrSol)=ElCLib::Parameter(OnCirc,pntcen(NbrSol));
}
}
}
WellDone = Standard_True;
}
}
}
}
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