[occt.git] / src / GccAna / GccAna_Circ2d3Tan_8.cxx

// Copyright (c) 1995-1999 Matra Datavision
// Copyright (c) 1999-2012 OPEN CASCADE SAS
//
// The content of this file is subject to the Open CASCADE Technology Public
// License Version 6.5 (the "License"). You may not use the content of this file
// except in compliance with the License. Please obtain a copy of the License
// at http://www.opencascade.org and read it completely before using this file.
//
// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
//
// The Original Code and all software distributed under the License is
// distributed on an "AS IS" basis, without warranty of any kind, and the
// Initial Developer hereby disclaims all such warranties, including without
// limitation, any warranties of merchantability, fitness for a particular
// purpose or non-infringement. Please see the License for the specific terms
// and conditions governing the rights and limitations under the License.


#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 <GccAna_LinPnt2dBisec.hxx>
#include <GccAna_Lin2dBisec.hxx>
#include <GccAna_Pnt2dBisec.hxx>
#include <GccInt_Bisec.hxx>
#include <GccInt_IType.hxx>
#include <IntAna2d_Conic.hxx>
#include <GccEnt_BadQualifier.hxx>
#include <Precision.hxx>
//=========================================================================
//   Creation of a circle tangent to a straight line and two points.      +
//=========================================================================

GccAna_Circ2d3Tan::
   GccAna_Circ2d3Tan (const GccEnt_QualifiedLin& 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)    
{

   WellDone = Standard_False;
   Standard_Real Tol = Abs(Tolerance);
   gp_Dir2d dirx(1.0,0.0);
   NbrSol = 0;
   if (!(Qualified1.IsEnclosed() ||
	 Qualified1.IsOutside() || Qualified1.IsUnqualified())) {
     GccEnt_BadQualifier::Raise();
     return;
   }

//=========================================================================
//   Processing.                                                          +
//=========================================================================

   gp_Lin2d L1  = Qualified1.Qualified();
   gp_Pnt2d origin1(L1.Location());
   gp_Dir2d dir1(L1.Direction());
   gp_Dir2d normL1(-dir1.Y(),dir1.X());

   if (Point2.IsEqual(Point3,Precision::Confusion())) {
     WellDone = Standard_False;
     return ;
   }

   GccAna_Pnt2dBisec Bis1(Point2,Point3);
   GccAna_LinPnt2dBisec Bis2(L1,Point2);
   if (Bis1.IsDone() && Bis2.IsDone()) {
     gp_Lin2d linint1(Bis1.ThisSolution());
     Handle(GccInt_Bisec) Sol2 = Bis2.ThisSolution();
     GccInt_IType typ2 = Sol2->ArcType();
#ifdef DEB
     gp_Lin2d linintb(Bis1.ThisSolution());
#else
     Bis1.ThisSolution() ;
#endif
     IntAna2d_AnaIntersection Intp;
     if (typ2 == GccInt_Lin) {
       gp_Lin2d linint2(Sol2->Line());
       Intp.Perform (linint1,linint2);
     }
     else if (typ2 == GccInt_Par) {
       Intp.Perform (linint1,IntAna2d_Conic(Sol2->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 = L1.Distance(Center);
	   Standard_Real dist2 = Center.Distance(Point2);

	   Standard_Real Radius=0;
	   Standard_Integer nbsol1 = 0;
//	   Standard_Integer nbsol2 = 0;
	   Standard_Integer nbsol3 = 0;
	   Standard_Boolean ok = Standard_False;
     Standard_Real  difference = (((origin1.X()-Center.X())*(-dir1.Y())) + ((origin1.Y()-Center.Y())*(dir1.X())));
     if ((Qualified1.IsEnclosed() && difference <= 0) ||
         (Qualified1.IsOutside() && difference >= 0) ||
         (Qualified1.IsUnqualified()))
     {
       ok = Standard_True;
       nbsol1 = 1;
       Radius = dist1;
     }
	   if (ok) {
	     if (Abs(dist2-Radius)<=Tol) { 
	       nbsol3 = 1;
	     }
	     else { ok = Standard_False; }
	   }
	   if (ok) {
	     for (Standard_Integer k = 1 ; k <= nbsol3 ; k++) {
	       NbrSol++;
	       cirsol(NbrSol) = gp_Circ2d(gp_Ax2d(Center,dirx),Radius);
//             =======================================================
	       gp_Dir2d dc1(origin1.XY()-Center.XY());
	       if (!Qualified1.IsUnqualified()) { 
		 qualifier1(NbrSol) = Qualified1.Qualifier();
	       }
	       else if (dc1.Dot(normL1) > 0.0) {
		 qualifier1(NbrSol) = GccEnt_outside;
	       }
	       else { qualifier1(NbrSol) = GccEnt_enclosed; }
	       qualifier2(NbrSol) = GccEnt_noqualifier;
	       qualifier3(NbrSol) = GccEnt_noqualifier;
	       TheSame1(NbrSol) = 0;
	       gp_Dir2d dc(origin1.XY()-Center.XY());
	       Standard_Real sign = dc.Dot(gp_Dir2d(-dir1.Y(),dir1.X()));
	       dc = gp_Dir2d(sign*gp_XY(-dir1.Y(),dir1.X()));
	       pnttg1sol(NbrSol) = gp_Pnt2d(Center.XY()+Radius*dc.XY());
	       par1sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol),
						pnttg1sol(NbrSol));
	       pararg1(NbrSol)=ElCLib::Parameter(L1,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;
     }
   }
 }
Commit	Line	Data
b311480e	1	// Copyright (c) 1995-1999 Matra Datavision
	2	// Copyright (c) 1999-2012 OPEN CASCADE SAS
	3	//
	4	// The content of this file is subject to the Open CASCADE Technology Public
	5	// License Version 6.5 (the "License"). You may not use the content of this file
	6	// except in compliance with the License. Please obtain a copy of the License
	7	// at http://www.opencascade.org and read it completely before using this file.
	8	//
	9	// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
	10	// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
	11	//
	12	// The Original Code and all software distributed under the License is
	13	// distributed on an "AS IS" basis, without warranty of any kind, and the
	14	// Initial Developer hereby disclaims all such warranties, including without
	15	// limitation, any warranties of merchantability, fitness for a particular
	16	// purpose or non-infringement. Please see the License for the specific terms
	17	// and conditions governing the rights and limitations under the License.
	18
7fd59977	19
7fd59977	20
	21	#include <GccAna_Circ2d3Tan.jxx>
	22
	23	#include <ElCLib.hxx>
	24	#include <IntAna2d_AnaIntersection.hxx>
	25	#include <IntAna2d_IntPoint.hxx>
	26	#include <gp_Lin2d.hxx>
	27	#include <gp_Circ2d.hxx>
	28	#include <gp_Dir2d.hxx>
	29	#include <GccAna_LinPnt2dBisec.hxx>
	30	#include <GccAna_Lin2dBisec.hxx>
	31	#include <GccAna_Pnt2dBisec.hxx>
	32	#include <GccInt_Bisec.hxx>
	33	#include <GccInt_IType.hxx>
	34	#include <IntAna2d_Conic.hxx>
	35	#include <GccEnt_BadQualifier.hxx>
	36	#include <Precision.hxx>
	37	//=========================================================================
0d969553	38	// Creation of a circle tangent to a straight line and two points. +
7fd59977	39	//=========================================================================
	40
	41	GccAna_Circ2d3Tan::
	42	GccAna_Circ2d3Tan (const GccEnt_QualifiedLin& Qualified1,
	43	const gp_Pnt2d& Point2 ,
	44	const gp_Pnt2d& Point3 ,
	45	const Standard_Real Tolerance ):
	46
	47	cirsol(1,2) ,
	48	qualifier1(1,2) ,
	49	qualifier2(1,2) ,
	50	qualifier3(1,2) ,
	51	TheSame1(1,2) ,
	52	TheSame2(1,2) ,
	53	TheSame3(1,2) ,
	54	pnttg1sol(1,2) ,
	55	pnttg2sol(1,2) ,
	56	pnttg3sol(1,2) ,
	57	par1sol(1,2) ,
	58	par2sol(1,2) ,
	59	par3sol(1,2) ,
	60	pararg1(1,2) ,
	61	pararg2(1,2) ,
	62	pararg3(1,2)
	63	{
	64
	65	WellDone = Standard_False;
	66	Standard_Real Tol = Abs(Tolerance);
	67	gp_Dir2d dirx(1.0,0.0);
	68	NbrSol = 0;
	69	if (!(Qualified1.IsEnclosed() \|\|
	70	Qualified1.IsOutside() \|\| Qualified1.IsUnqualified())) {
	71	GccEnt_BadQualifier::Raise();
	72	return;
	73	}
	74
	75	//=========================================================================
0d969553	76	// Processing. +
7fd59977	77	//=========================================================================
	78
	79	gp_Lin2d L1 = Qualified1.Qualified();
	80	gp_Pnt2d origin1(L1.Location());
	81	gp_Dir2d dir1(L1.Direction());
	82	gp_Dir2d normL1(-dir1.Y(),dir1.X());
	83
	84	if (Point2.IsEqual(Point3,Precision::Confusion())) {
	85	WellDone = Standard_False;
	86	return ;
	87	}
	88
	89	GccAna_Pnt2dBisec Bis1(Point2,Point3);
	90	GccAna_LinPnt2dBisec Bis2(L1,Point2);
	91	if (Bis1.IsDone() && Bis2.IsDone()) {
	92	gp_Lin2d linint1(Bis1.ThisSolution());
	93	Handle(GccInt_Bisec) Sol2 = Bis2.ThisSolution();
	94	GccInt_IType typ2 = Sol2->ArcType();
	95	#ifdef DEB
	96	gp_Lin2d linintb(Bis1.ThisSolution());
	97	#else
	98	Bis1.ThisSolution() ;
	99	#endif
	100	IntAna2d_AnaIntersection Intp;
	101	if (typ2 == GccInt_Lin) {
	102	gp_Lin2d linint2(Sol2->Line());
	103	Intp.Perform (linint1,linint2);
	104	}
	105	else if (typ2 == GccInt_Par) {
	106	Intp.Perform (linint1,IntAna2d_Conic(Sol2->Parabola()));
	107	}
	108	if (Intp.IsDone()) {
	109	if ((!Intp.IsEmpty())&&(!Intp.ParallelElements())&&
	110	(!Intp.IdenticalElements())) {
	111	for (Standard_Integer j = 1 ; j <= Intp.NbPoints() ; j++) {
	112	gp_Pnt2d Center(Intp.Point(j).Value());
	113	Standard_Real dist1 = L1.Distance(Center);
	114	Standard_Real dist2 = Center.Distance(Point2);
6e6cd5d9	115
7fd59977	116	Standard_Real Radius=0;
	117	Standard_Integer nbsol1 = 0;
	118	// Standard_Integer nbsol2 = 0;
	119	Standard_Integer nbsol3 = 0;
	120	Standard_Boolean ok = Standard_False;
f2fd3809	121	Standard_Real difference = (((origin1.X()-Center.X())(-dir1.Y())) + ((origin1.Y()-Center.Y())(dir1.X())));
	122	if ((Qualified1.IsEnclosed() && difference <= 0) \|\|
	123	(Qualified1.IsOutside() && difference >= 0) \|\|
	124	(Qualified1.IsUnqualified()))
	125	{
	126	ok = Standard_True;
	127	nbsol1 = 1;
	128	Radius = dist1;
	129	}
7fd59977	130	if (ok) {
f2fd3809	131	if (Abs(dist2-Radius)<=Tol) {
7fd59977	132	nbsol3 = 1;
	133	}
	134	else { ok = Standard_False; }
	135	}
	136	if (ok) {
	137	for (Standard_Integer k = 1 ; k <= nbsol3 ; k++) {
	138	NbrSol++;
	139	cirsol(NbrSol) = gp_Circ2d(gp_Ax2d(Center,dirx),Radius);
	140	// =======================================================
	141	gp_Dir2d dc1(origin1.XY()-Center.XY());
	142	if (!Qualified1.IsUnqualified()) {
	143	qualifier1(NbrSol) = Qualified1.Qualifier();
	144	}
	145	else if (dc1.Dot(normL1) > 0.0) {
	146	qualifier1(NbrSol) = GccEnt_outside;
	147	}
	148	else { qualifier1(NbrSol) = GccEnt_enclosed; }
	149	qualifier2(NbrSol) = GccEnt_noqualifier;
	150	qualifier3(NbrSol) = GccEnt_noqualifier;
	151	TheSame1(NbrSol) = 0;
	152	gp_Dir2d dc(origin1.XY()-Center.XY());
	153	Standard_Real sign = dc.Dot(gp_Dir2d(-dir1.Y(),dir1.X()));
	154	dc = gp_Dir2d(sign*gp_XY(-dir1.Y(),dir1.X()));
	155	pnttg1sol(NbrSol) = gp_Pnt2d(Center.XY()+Radius*dc.XY());
	156	par1sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol),
	157	pnttg1sol(NbrSol));
	158	pararg1(NbrSol)=ElCLib::Parameter(L1,pnttg1sol(NbrSol));
	159	TheSame2(NbrSol) = 0;
	160	pnttg2sol(NbrSol) = Point2;
	161	par2sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol),
	162	pnttg2sol(NbrSol));
	163	pararg2(NbrSol) = 0.;
	164	TheSame3(NbrSol) = 0;
	165	pnttg3sol(NbrSol) = Point3;
	166	par3sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol),
	167	pnttg3sol(NbrSol));
	168	pararg3(NbrSol) = 0.;
	169	}
	170	}
	171	}
	172	}
	173	WellDone = Standard_True;
	174	}
	175	}
	176	}
	177