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->isFace())
  36     return false;
  37
  38   const TopoDS_Shape& aMyShape = const_cast<GeomAPI_Face*>(this)->impl<TopoDS_Shape>();
  39   const TopoDS_Shape& aInShape = theFace->impl<TopoDS_Shape>();
  40
  41   Handle(Geom_Surface) aMySurf = BRep_Tool::Surface(TopoDS::Face(aMyShape));
  42   Handle(Geom_Surface) aInSurf = BRep_Tool::Surface(TopoDS::Face(aInShape));
  43
  44   // Check that surfaces a the same type
  45   if (aMySurf->DynamicType() != aInSurf->DynamicType())
  46     return false;
  47
  48   // Get parameters of surfaces
  49   double aMyUMin, aMyUMax, aMyVMin, aMyVMax;
  50   aMySurf->Bounds(aMyUMin, aMyUMax, aMyVMin, aMyVMax);
  51   double aInUMin, aInUMax, aInVMin, aInVMax;
  52   aInSurf->Bounds(aInUMin, aInUMax, aInVMin, aInVMax);
  53
  54   // Check that parameters are the same
  55   if (fabs(aMyUMin - aInUMin) > Precision::PConfusion() ||
  56       fabs(aMyUMax - aInUMax) > Precision::PConfusion() ||
  57       fabs(aMyVMin - aInVMin) > Precision::PConfusion() ||
  58       fabs(aMyVMax - aInVMax) > Precision::PConfusion())
  59     return false;
  60
  61   return true;
  62 }
  63
  64 bool GeomAPI_Face::isCylindrical() const
  65 {
  66   const TopoDS_Shape& aShape = const_cast<GeomAPI_Face*>(this)->impl<TopoDS_Shape>();
  67   Handle(Geom_Surface) aSurf = BRep_Tool::Surface(TopoDS::Face(aShape));
  68   Handle(Geom_RectangularTrimmedSurface) aTrimmed =
  69     Handle(Geom_RectangularTrimmedSurface)::DownCast(aSurf);
  70   if (!aTrimmed.IsNull())
  71     aSurf = aTrimmed->BasisSurface();
  72   return aSurf->IsKind(STANDARD_TYPE(Geom_CylindricalSurface)) == Standard_True;
  73 }
  74
  75 std::shared_ptr<GeomAPI_Pln> GeomAPI_Face::getPlane() const
  76 {
  77   const TopoDS_Shape& aShape = const_cast<GeomAPI_Face*>(this)->impl<TopoDS_Shape>();
  78   BRepAdaptor_Surface aSurfAdapt(TopoDS::Face(aShape));
  79
  80   if (aSurfAdapt.GetType() != GeomAbs_Plane)
  81     return std::shared_ptr<GeomAPI_Pln>();
  82
  83   // Obtain central point
  84   double aUMin, aUMax, aVMin, aVMax;
  85   aUMin = aSurfAdapt.FirstUParameter();
  86   aUMax = aSurfAdapt.LastUParameter();
  87   aVMin = aSurfAdapt.FirstVParameter();
  88   aVMax = aSurfAdapt.LastVParameter();
  89   gp_Pnt aCentralPnt;
  90   gp_Vec aDU, aDV;
  91   aSurfAdapt.D1((aUMin+aUMax)*0.5, (aVMin+aVMax)*0.5, aCentralPnt, aDU, aDV);
  92   std::shared_ptr<GeomAPI_Pnt> aCenter(
  93       new GeomAPI_Pnt(aCentralPnt.X(), aCentralPnt.Y(), aCentralPnt.Z()));
  94
  95   // Obtain plane direction
  96   gp_XYZ aNormalVec = aDU.XYZ().Crossed(aDV.XYZ());
  97   if (aNormalVec.SquareModulus() < Precision::Confusion() * Precision::Confusion())
  98     return std::shared_ptr<GeomAPI_Pln>();
  99   std::shared_ptr<GeomAPI_Dir> aNormal(
 100       new GeomAPI_Dir(aNormalVec.X(), aNormalVec.Y(), aNormalVec.Z()));
 101
 102   std::shared_ptr<GeomAPI_Pln> aResult(new GeomAPI_Pln(aCenter, aNormal));
 103   return aResult;
 104 }