src/GeomAPI/GeomAPI_Face.cpp

   1 // Copyright (C) 2014-20xx CEA/DEN, EDF R&D
   2
   3 // File:        GeomAPI_Face.cpp
   4 // Created:     2 Dec 2014
   5 // Author:      Artem ZHIDKOV
   6
   7 #include "GeomAPI_Face.h"
   8
   9 #include "GeomAPI_Dir.h"
  10 #include "GeomAPI_Pln.h"
  11 #include "GeomAPI_Pnt.h"
  12
  13 #include <BRep_Tool.hxx>
  14 #include <BRepAdaptor_Surface.hxx>
  15 #include <Geom_Surface.hxx>
  16 #include <Geom_CylindricalSurface.hxx>
  17 #include <Geom_RectangularTrimmedSurface.hxx>
  18 #include <TopoDS.hxx>
  19 #include <TopoDS_Face.hxx>
  20
  21 GeomAPI_Face::GeomAPI_Face()
  22   : GeomAPI_Shape()
  23 {
  24 }
  25
  26 GeomAPI_Face::GeomAPI_Face(const std::shared_ptr<GeomAPI_Shape>& theShape)
  27 {
  28   if (!theShape->isNull() && theShape->isFace()) {
  29     setImpl(new TopoDS_Shape(theShape->impl<TopoDS_Shape>()));
  30   }
  31 }
  32
  33 bool GeomAPI_Face::isEqual(std::shared_ptr<GeomAPI_Shape> theFace) const
  34 {
  35   if (!theFace.get())
  36     return false;
  37
  38   if (!theFace->isFace())
  39     return false;
  40
  41   const TopoDS_Shape& aMyShape = const_cast<GeomAPI_Face*>(this)->impl<TopoDS_Shape>();
  42   const TopoDS_Shape& aInShape = theFace->impl<TopoDS_Shape>();
  43
  44   Handle(Geom_Surface) aMySurf = BRep_Tool::Surface(TopoDS::Face(aMyShape));
  45   Handle(Geom_Surface) aInSurf = BRep_Tool::Surface(TopoDS::Face(aInShape));
  46
  47   // Check that surfaces a the same type
  48   if (aMySurf->DynamicType() != aInSurf->DynamicType())
  49     return false;
  50
  51   // Get parameters of surfaces
  52   double aMyUMin, aMyUMax, aMyVMin, aMyVMax;
  53   aMySurf->Bounds(aMyUMin, aMyUMax, aMyVMin, aMyVMax);
  54   double aInUMin, aInUMax, aInVMin, aInVMax;
  55   aInSurf->Bounds(aInUMin, aInUMax, aInVMin, aInVMax);
  56
  57   // Check that parameters are the same
  58   if (fabs(aMyUMin - aInUMin) > Precision::PConfusion() ||
  59       fabs(aMyUMax - aInUMax) > Precision::PConfusion() ||
  60       fabs(aMyVMin - aInVMin) > Precision::PConfusion() ||
  61       fabs(aMyVMax - aInVMax) > Precision::PConfusion())
  62     return false;
  63
  64   return true;
  65 }
  66
  67 bool GeomAPI_Face::isCylindrical() const
  68 {
  69   const TopoDS_Shape& aShape = const_cast<GeomAPI_Face*>(this)->impl<TopoDS_Shape>();
  70   Handle(Geom_Surface) aSurf = BRep_Tool::Surface(TopoDS::Face(aShape));
  71   Handle(Geom_RectangularTrimmedSurface) aTrimmed =
  72     Handle(Geom_RectangularTrimmedSurface)::DownCast(aSurf);
  73   if (!aTrimmed.IsNull())
  74     aSurf = aTrimmed->BasisSurface();
  75   return aSurf->IsKind(STANDARD_TYPE(Geom_CylindricalSurface)) == Standard_True;
  76 }
  77
  78 std::shared_ptr<GeomAPI_Pln> GeomAPI_Face::getPlane() const
  79 {
  80   const TopoDS_Shape& aShape = const_cast<GeomAPI_Face*>(this)->impl<TopoDS_Shape>();
  81   BRepAdaptor_Surface aSurfAdapt(TopoDS::Face(aShape));
  82
  83   if (aSurfAdapt.GetType() != GeomAbs_Plane)
  84     return std::shared_ptr<GeomAPI_Pln>();
  85
  86   // Obtain central point
  87   double aUMin, aUMax, aVMin, aVMax;
  88   aUMin = aSurfAdapt.FirstUParameter();
  89   aUMax = aSurfAdapt.LastUParameter();
  90   aVMin = aSurfAdapt.FirstVParameter();
  91   aVMax = aSurfAdapt.LastVParameter();
  92   gp_Pnt aCentralPnt;
  93   gp_Vec aDU, aDV;
  94   aSurfAdapt.D1((aUMin+aUMax)*0.5, (aVMin+aVMax)*0.5, aCentralPnt, aDU, aDV);
  95   std::shared_ptr<GeomAPI_Pnt> aCenter(
  96       new GeomAPI_Pnt(aCentralPnt.X(), aCentralPnt.Y(), aCentralPnt.Z()));
  97
  98   // Obtain plane direction
  99   gp_XYZ aNormalVec = aDU.XYZ().Crossed(aDV.XYZ());
 100   if (aNormalVec.SquareModulus() < Precision::Confusion() * Precision::Confusion())
 101     return std::shared_ptr<GeomAPI_Pln>();
 102   std::shared_ptr<GeomAPI_Dir> aNormal(
 103       new GeomAPI_Dir(aNormalVec.X(), aNormalVec.Y(), aNormalVec.Z()));
 104
 105   std::shared_ptr<GeomAPI_Pln> aResult(new GeomAPI_Pln(aCenter, aNormal));
 106   return aResult;
 107 }