OCCT

// Created on: 1995-05-30
// Created by: Stagiaire Flore Lantheaume
// Copyright (c) 1995-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.


#include <Adaptor3d_Surface.hxx>
#include <ChFiDS_Spine.hxx>
#include <ChFiDS_SurfData.hxx>
#include <ChFiKPart_ComputeData.hxx>
#include <ChFiKPart_ComputeData_ChAsymPlnCon.hxx>
#include <ChFiKPart_ComputeData_Fcts.hxx>
#include <ElCLib.hxx>
#include <ElSLib.hxx>
#include <gp_Ax3.hxx>
#include <gp_Circ.hxx>
#include <gp_Dir.hxx>
#include <gp_Pnt.hxx>
#include <gp_Vec.hxx>
#include <Precision.hxx>
#include <TopOpeBRepDS_DataStructure.hxx>

//=======================================================================
//function : MakeChamfer
//purpose  : Compute the chamfer in the particular case Plane/Cone or 
//           Cylinder/Plane
//           Compute the SurfData <Data> of the chamfer build on the <Spine>
//           between the plane <Pln> and the cone <Con>, with the 
//           distances <Dis1> on <Pln> and <Dis2> on <Con>.
//           <Or1> and <Or2> are the orientations of <Pln> and <Con>
//           and <Ofpl> this of the face carried by <Pln>.
//           <First> is the start point on the <Spine>
//           <Plandab> is equal to True if the plane is the surface S1
//           <fu> and <lu> are the first and last u parameters of the
//           cone
//out      : True if the chanfer has been computed
//           False else
//=======================================================================
Standard_Boolean ChFiKPart_MakeChamfer(TopOpeBRepDS_DataStructure& DStr,
				       const Handle(ChFiDS_SurfData)& Data, 
                                       const ChFiDS_ChamfMode theMode,
				       const gp_Pln& Pln, 
				       const gp_Cone& Con, 
				       const Standard_Real fu,
				       const Standard_Real lu,
				       const TopAbs_Orientation Or1,
				       const TopAbs_Orientation Or2,
				       const Standard_Real theDis1, 
				       const Standard_Real theDis2,
				       const gp_Circ& Spine, 
				       const Standard_Real First, 
				       const TopAbs_Orientation Ofpl,
				       const Standard_Boolean plandab)
{

  Standard_Real angcon = Con.SemiAngle();

  Standard_Real Dis1 = theDis1, Dis2 = theDis2;
  Standard_Real Alpha = M_PI/2 - angcon;
  Standard_Real CosHalfAlpha = Cos(Alpha/2);
  if (theMode == ChFiDS_ConstThroatChamfer)
    Dis1 = Dis2 = theDis1 / CosHalfAlpha;
  else if (theMode == ChFiDS_ConstThroatWithPenetrationChamfer)
  {
    Standard_Real aDis1 = Min(theDis1, theDis2);
    Standard_Real aDis2 = Max(theDis1, theDis2);
    Standard_Real dis1dis1 = aDis1*aDis1, dis2dis2 = aDis2*aDis2;
    Standard_Real SinAlpha = Sin(Alpha);
    Standard_Real CosAlpha = Cos(Alpha);
    Standard_Real CotanAlpha = CosAlpha/SinAlpha;
    Dis1 = sqrt(dis2dis2 - dis1dis1) - aDis1*CotanAlpha;
    Standard_Real CosBeta = sqrt(1-dis1dis1/dis2dis2)*CosAlpha + aDis1/aDis2*SinAlpha;
    Standard_Real FullDist1 = aDis2/CosBeta;
    Dis2 = FullDist1 - aDis1/SinAlpha;
  }
  
  Standard_Real sincon =Abs(Sin(angcon));
  Standard_Real angle;
  Standard_Boolean IsResol;

  gp_Ax3 PosPl = Pln.Position();
  gp_Dir Dpl = PosPl.XDirection().Crossed(PosPl.YDirection());
  if ( Or1 == TopAbs_REVERSED ) Dpl.Reverse();

  // compute the origin of the conical chamfer PtPl
  gp_Pnt Or = Con.Location();
  Standard_Real u,v;
  ElSLib::PlaneParameters(PosPl,Or,u,v);
#ifdef OCCT_DEBUG
  gp_Pnt2d pt2dPln(u,v);
#endif
  ElSLib::PlaneD0(u,v,PosPl,Or);

  gp_Pnt PtSp;
  gp_Vec DSp;
  ElCLib::D1(First,Spine,PtSp,DSp);
#ifdef OCCT_DEBUG
  gp_Dir Dx(gp_Vec(Or,PtSp));
#endif
  //compute the normal to the cone in PtSp
  gp_Vec deru,derv;
  gp_Pnt PtCon;
  ElSLib::Parameters(Con,PtSp,u,v);
  ElSLib::D1(u,v,Con,PtCon ,deru,derv);
  gp_Dir Dcon( deru.Crossed(derv) );
  if ( Or2 == TopAbs_REVERSED ) Dcon.Reverse();
  
  Standard_Boolean ouvert = ( Dpl.Dot(Dcon) >= 0.);

  if (!ouvert) {
    if (Abs(Dis1 - Dis2 * sincon) > Precision::Confusion()) {
      Standard_Real abscos = Abs(Dis2 - Dis1 * sincon);
      angle = ATan((Dis1 * Cos(angcon)) / abscos);
    }
    else {
      angle = angcon;
    }
  }
  else {
    angle = ATan((Dis1 * Cos(angcon)) / (Dis2 + Dis1 * sincon));
  }

  Standard_Boolean DisOnP = Standard_False;

  IsResol = ChFiKPart_MakeChAsym(DStr,  Data, Pln, Con, fu, lu, Or1, Or2,
				 Dis2, angle, Spine,  First,  Ofpl, plandab, DisOnP);

  return IsResol;

}
 
/*
 // Compute the chamfer surface(cone)
  gp_Ax3 PosPl = Pln.Position();
  gp_Dir Dpl = PosPl.XDirection().Crossed(PosPl.YDirection());
  gp_Dir norf = Dpl;
  if (Ofpl == TopAbs_REVERSED ) norf.Reverse();
  if ( Or1 == TopAbs_REVERSED ) Dpl.Reverse();

    // compute the origin of the conical chamfer PtPl
  gp_Pnt Or = Con.Location();
  Standard_Real u,v;
  ElSLib::PlaneParameters(PosPl,Or,u,v);
  gp_Pnt2d pt2dPln(u,v);
  ElSLib::PlaneD0(u,v,PosPl,Or);
  gp_Pnt PtPl = Or;

  gp_Pnt PtSp;
  gp_Vec DSp;
  ElCLib::D1(First,Spine,PtSp,DSp);
  gp_Dir Dx(gp_Vec(PtPl,PtSp));

    //compute the normal to the cone in PtSp
  gp_Vec deru,derv;
  gp_Pnt PtCon;
  ElSLib::Parameters(Con,PtSp,u,v);
  ElSLib::D1(u,v,Con,PtCon ,deru,derv);
  gp_Dir Dcon( deru.Crossed(derv) );
  if ( Or2 == TopAbs_REVERSED ) Dcon.Reverse();
  
  Standard_Boolean dedans = ( Dx.Dot(Dcon) <= 0.);
  Standard_Boolean ouvert = ( Dpl.Dot(Dcon) >= 0.);

    // variables used to compute the semiangle of the chamfer
  Standard_Real angle = Con.SemiAngle();
  Standard_Real move = Dis2 * Cos(angle);
  Or.SetCoord( Or.X()+ move*Dpl.X(),
	       Or.Y()+ move*Dpl.Y(),
	       Or.Z()+ move*Dpl.Z());

  gp_Dir Vec1(Or.X()-PtPl.X(), Or.Y()-PtPl.Y(), Or.Z()-PtPl.Z());
  Standard_Real Dis;
  if (ouvert)
    Dis = Dis1 + Dis2*Abs(Sin(angle));
  else
    Dis = Dis1 - Dis2*Abs(Sin(angle));

  gp_Pnt Pt(Or.X()+Dis*PosPl.XDirection().X(),
	    Or.Y()+Dis*PosPl.XDirection().Y(),
	    Or.Z()+Dis*PosPl.XDirection().Z());
  gp_Dir Vec2( Pt.X()-PtPl.X(), Pt.Y()-PtPl.Y(), Pt.Z()-PtPl.Z());

    // compute the parameters of the conical chamfer
  Standard_Real ChamfRad,SemiAngl;
  Standard_Boolean pointu = Standard_False;

  if (dedans) {
    ChamfRad = Spine.Radius() - Dis1;
    if ( Abs(ChamfRad)<=Precision::Confusion() ) pointu = Standard_True;
    if( ChamfRad < 0 ) {
#ifdef OCCT_DEBUG
      std::cout<<"le chanfrein ne passe pas"<<std::endl;
#endif
      return Standard_False;
    }
  }
  else {
    ChamfRad = Spine.Radius() + Dis1;
    gp_Dir Dplr = Dpl.Reversed();
    Dpl = Dplr;
  }

  gp_Ax3 ChamfAx3(PtPl,Dpl,Dx);
  SemiAngl = Vec1.Angle(Vec2);

  Handle (Geom_ConicalSurface)
    gcon = new Geom_ConicalSurface( ChamfAx3, SemiAngl, ChamfRad );

    // changes due to the fact the parameters of the chamfer must go increasing
    // from surface S1 to surface S2
  if ( (dedans && !plandab) || (!dedans && plandab) ) {
    gcon->VReverse();// be careful : the SemiAngle was changed
    ChamfAx3 = gcon->Position();
    SemiAngl = gcon->SemiAngle();
  }

    // changes due to the fact we have reversed the V direction of 
    // parametrization
  if (ChamfAx3.YDirection().Dot(DSp) <= 0.) {
    ChamfAx3.YReverse();
    gcon->SetPosition(ChamfAx3);
  }

  Data->ChangeSurf(ChFiKPart_IndexSurfaceInDS(gcon,DStr));


  //compute the chamfer's orientation according to the orientation
  // of the faces

    //search the normal to the conical chamfer
  gp_Pnt P;
  u=0.;
  if (plandab)
    v = sqrt(Dis*Dis + move*move);
  else
    v = - sqrt(Dis*Dis + move*move);
  ElSLib::ConeD1(u,v,ChamfAx3,ChamfRad,SemiAngl,P,deru,derv);
  gp_Dir norchamf(deru.Crossed(derv));

  Standard_Boolean toreverse = (norf.Dot(norchamf)<= 0.);

  if (toreverse)
    Data->ChangeOrientation() = TopAbs_REVERSED;
  else
    Data->ChangeOrientation() = TopAbs_FORWARD; 


  //we load the faceInterference with the pcurves and
  // the 3d curves

    // Case of the plane face
    // NB: in the case 'pointu', no pcurve on the plane surface
    // and no intersection plane-chamfer are needed

    // intersection plane-chamfer
  Handle(Geom_Circle) GCirPln;
  Handle(Geom2d_Circle) GCir2dPln;
  gp_Ax2 CirAx2 = ChamfAx3.Ax2();
  CirAx2.SetLocation(PtPl);

  if (!pointu) {
    Pt.SetCoord(PtPl.X()+ChamfRad*Dx.X(),
		PtPl.Y()+ChamfRad*Dx.Y(),
		PtPl.Z()+ChamfRad*Dx.Z());
    gp_Circ CirPln(CirAx2,ChamfRad);
    GCirPln = new Geom_Circle(CirPln);
  
      //pcurve on the plane
    ElSLib::PlaneParameters(PosPl,Pt ,u,v);
    gp_Pnt2d p2dPln(u,v);
    gp_Dir2d d2d(DSp.Dot(PosPl.XDirection()),DSp.Dot(PosPl.YDirection()));
    gp_Ax22d ax2dPln(pt2dPln, gp_Dir2d(gp_Vec2d(pt2dPln,p2dPln)),d2d);
    gp_Circ2d cir2dPln(ax2dPln,ChamfRad);
    GCir2dPln = new Geom2d_Circle(cir2dPln);
  }

      //pcurve on chamfer
  gp_Pnt2d p2dch;
  p2dch.SetCoord(0.,0.);
  ElSLib::ConeD1(0.,0.,ChamfAx3,ChamfRad,SemiAngl,Pt,deru,derv);
  gp_Lin2d lin2dch(p2dch,gp::DX2d());
  Handle(Geom2d_Line) GLin2dCh1 = new Geom2d_Line(lin2dch);

      //orientation
  TopAbs_Orientation trans; 
  gp_Dir norpl = PosPl.XDirection().Crossed(PosPl.YDirection());
  if (!pointu)
    norchamf.SetXYZ (deru.Crossed(derv).XYZ());
  toreverse = ( norchamf.Dot(norpl) <= 0. );
  if ((toreverse && plandab) || (!toreverse && !plandab)){ 
    trans = TopAbs_FORWARD;
  }
  else { 
    trans = TopAbs_REVERSED; 
  }

  if(plandab){
    Data->ChangeInterferenceOnS1().
      SetInterference(ChFiKPart_IndexCurveInDS(GCirPln,DStr),
		      trans,GCir2dPln,GLin2dCh1);
  }
  else{
    Data->ChangeInterferenceOnS2().
      SetInterference(ChFiKPart_IndexCurveInDS(GCirPln,DStr),
		      trans,GCir2dPln,GLin2dCh1);
  }


    // Case of the conical face

      //intersection cone-chamfer
  Standard_Real Rad;
  if (dedans)
    Rad = ChamfRad + Dis;
  else
    Rad = ChamfRad - Dis;

  CirAx2.SetLocation(Or);
  gp_Circ CirCon(CirAx2, Rad);
  Handle(Geom_Circle) GCirCon = new Geom_Circle(CirCon);  

      //pcurve on chamfer
  if (plandab)
    v = sqrt(Dis*Dis + move*move);
  else
    v = - sqrt(Dis*Dis + move*move);
  p2dch.SetCoord(0.,v);
  ElSLib::ConeD1(0.,v,ChamfAx3,ChamfRad,SemiAngl,Pt,deru,derv);
  lin2dch.SetLocation(p2dch);
  Handle(Geom2d_Line) GLin2dCh2 = new Geom2d_Line(lin2dch);
  
      //pcurve on cone
  norchamf.SetXYZ (deru.Crossed(derv).XYZ());

  Pt.SetCoord(Or.X()+Rad*Dx.X(),
	      Or.Y()+Rad*Dx.Y(),
	      Or.Z()+Rad*Dx.Z());
  ElSLib::Parameters(Con,Pt ,u,v);
  Standard_Real tol = Precision::PConfusion();
  if(u >= 2*M_PI - tol && u <= 2*M_PI) u = 0.;
  if(u >= fu - tol && u < fu) u = fu;
  if(u <= lu + tol && u > lu) u = lu;
  if(u < fu || u > lu) u = ElCLib::InPeriod(u,fu,fu + 2*M_PI);
  ElSLib::D1(u,v,Con,Pt,deru,derv);
  gp_Pnt2d p2dCon(u,v);
  gp_Dir2d d2dCon;
  if ( deru.Dot(DSp)<=0. )
    d2dCon = - gp::DX2d();
  else
    d2dCon = gp::DX2d();
  gp_Lin2d lin2dCon(p2dCon,d2dCon);
  Handle(Geom2d_Line) GLin2dCon = new Geom2d_Line(lin2dCon);

      //orientation
  gp_Dir norcon = deru.Crossed(derv);
  toreverse = ( norchamf.Dot(norcon) <= 0. );
  if ((toreverse && plandab) || (!toreverse && !plandab) ) {
    trans = TopAbs_REVERSED;
  }
  else {
    trans = TopAbs_FORWARD;
  }

  if(plandab){
    Data->ChangeInterferenceOnS2().
      SetInterference(ChFiKPart_IndexCurveInDS(GCirCon,DStr),
		      trans,GLin2dCon,GLin2dCh2);
  }
  else{
    Data->ChangeInterferenceOnS1().
      SetInterference(ChFiKPart_IndexCurveInDS(GCirCon,DStr),
		      trans,GLin2dCon,GLin2dCh2);
  }
  

  return Standard_True;
}

*/