src/GeomAlgoAPI/GeomAlgoAPI_FaceBuilder.cpp

   1 // File:        GeomAlgoAPI_FaceBuilder.cpp
   2 // Created:     23 Apr 2014
   3 // Author:      Mikhail PONIKAROV
   4
   5 #include <GeomAlgoAPI_FaceBuilder.h>
   6 #include <gp_Pln.hxx>
   7 #include <BRepBuilderAPI_MakeFace.hxx>
   8 #include <TopoDS_Face.hxx>
   9 #include <TopoDS.hxx>
  10 #include <BRep_Tool.hxx>
  11 #include <Geom_Plane.hxx>
  12
  13 boost::shared_ptr<GeomAPI_Shape> GeomAlgoAPI_FaceBuilder::square(
  14     boost::shared_ptr<GeomAPI_Pnt> theCenter, boost::shared_ptr<GeomAPI_Dir> theNormal,
  15     const double theSize)
  16 {
  17   const gp_Pnt& aCenter = theCenter->impl<gp_Pnt>();
  18   const gp_Dir& aDir = theNormal->impl<gp_Dir>();
  19   gp_Pln aPlane(aCenter, aDir);
  20   // half of the size in each direction from the center
  21   BRepBuilderAPI_MakeFace aFaceBuilder(aPlane, -theSize / 2., theSize / 2., -theSize / 2.,
  22                                        theSize / 2.);
  23   boost::shared_ptr<GeomAPI_Shape> aRes(new GeomAPI_Shape);
  24   aRes->setImpl(new TopoDS_Shape(aFaceBuilder.Face()));
  25   return aRes;
  26 }
  27
  28 boost::shared_ptr<GeomAPI_Pln> GeomAlgoAPI_FaceBuilder::plane(
  29     boost::shared_ptr<GeomAPI_Shape> theFace)
  30 {
  31   boost::shared_ptr<GeomAPI_Pln> aResult;
  32   if (!theFace)
  33     return aResult;  // bad shape
  34   TopoDS_Shape aShape = theFace->impl<TopoDS_Shape>();
  35   if (aShape.IsNull())
  36     return aResult;  // null shape
  37   TopoDS_Face aFace = TopoDS::Face(aShape);
  38   if (aFace.IsNull())
  39     return aResult;  // not face
  40   Handle(Geom_Surface) aSurf = BRep_Tool::Surface(aFace);
  41   if (aSurf.IsNull())
  42     return aResult;  // no surface
  43   Handle(Geom_Plane) aPlane = Handle(Geom_Plane)::DownCast(aSurf);
  44   if (aPlane.IsNull())
  45     return aResult;  // not planar
  46   double aA, aB, aC, aD;
  47   aPlane->Coefficients(aA, aB, aC, aD);
  48   aResult = boost::shared_ptr<GeomAPI_Pln>(new GeomAPI_Pln(aA, aB, aC, aD));
  49   return aResult;
  50 }