// File:	TopOpeBRepTool_SC.cxx
// Created:	Wed Apr  1 15:22:42 1998
// Author:	Jean Yves LEBEY
//		<jyl@langdox.paris1.matra-dtv.fr>

#include <BRep_Tool.hxx>
#include <TopoDS.hxx>
#include <TopOpeBRepTool_EXPORT.hxx>
#include <TopOpeBRepTool_SC.hxx>

// ----------------------------------------------------------------------
static TopOpeBRepTool_PShapeClassifier TopOpeBRepTool_PSC = NULL;
Standard_EXPORT TopOpeBRepTool_ShapeClassifier& FSC_GetPSC(void)
{
  if (TopOpeBRepTool_PSC == NULL) TopOpeBRepTool_PSC = new TopOpeBRepTool_ShapeClassifier();
  return *TopOpeBRepTool_PSC;
}
// ----------------------------------------------------------------------
Standard_EXPORT TopOpeBRepTool_ShapeClassifier& FSC_GetPSC(const TopoDS_Shape& S)
{ 
  if (TopOpeBRepTool_PSC == NULL) TopOpeBRepTool_PSC = new TopOpeBRepTool_ShapeClassifier();
  TopOpeBRepTool_PSC->SetReference(S);
  return *TopOpeBRepTool_PSC;
}

// ----------------------------------------------------------------------
Standard_EXPORT TopAbs_State FSC_StatePonFace(const gp_Pnt& P,const TopoDS_Shape& F,
				      TopOpeBRepTool_ShapeClassifier& PSC)
{
  // Projects <P> on the surface and classifies it in the face <F>
  Handle(Geom_Surface) S = BRep_Tool::Surface(TopoDS::Face(F));

  gp_Pnt2d UV; Standard_Real dist; Standard_Boolean ok = FUN_tool_projPonS(P,S,UV,dist);
  if (!ok) return TopAbs_UNKNOWN;

  PSC.SetReference(TopoDS::Face(F));
  PSC.StateP2DReference(UV);
  TopAbs_State state = PSC.State();
  
  return state;
}

// ----------------------------------------------------------------------
Standard_EXPORT TopAbs_State FSC_StateEonFace(const TopoDS_Shape& E,const Standard_Real t,const TopoDS_Shape& F,
				      TopOpeBRepTool_ShapeClassifier& PSC)
{
  BRepAdaptor_Curve BAC(TopoDS::Edge(E));
  Standard_Real f,l; FUN_tool_bounds(TopoDS::Edge(E),f,l);
  Standard_Real par = (1-t)*f + t*l;
  gp_Pnt P;BAC.D0(par,P);
  TopAbs_State state = FSC_StatePonFace(P,F,PSC);  
  return state;
}