3D modeling & numerical simulation

### How to get the outline of a shape

How to get the outline of a shape
 George Feng 2012/07/04 13:46 When I project with hlr, the edge as shown in the attached picture marked with a green arrow is grouped into VCompound in the projection results, and does not appear in the OutLineVCompound. But I want to recognize the edge as an outline edge in the projection results. How can I distinguish the line with others. Can anyone give me some suggestions? You have to be logged in to download the attached file
 George Feng 2012/07/04 13:50 TopoDS_Shape needRotateShape = aHLRToShape.VCompound();      TopoDS_Shape OutLineShape = aHLRToShape.OutLineVCompound();      TopoDS_Shape Rg1LineShape = aHLRToShape.Rg1LineVCompound();      TopoDS_Shape RgNLineVShape = aHLRToShape.RgNLineVCompound();      TopoDS_Shape IsoLineShape = aHLRToShape.IsoLineVCompound();
 George Feng 2012/07/04 13:57 The projecting direction in this problem should be from top to bottom along Z axis.
 George Feng 2012/07/04 14:00 Codes to generate the cylindrical shape are as follows: TopoDS_Shape aCylinderShape, aBoxShape; // first Shape = Cylinder gp_Pnt middlePoint = gp_Pnt(500, 0, 1000); gp_Dir direction = gp_Dir(0, 1, 0); gp_Ax2 Ax2 = gp_Ax2(middlePoint, direction); aCylinderShape = BRepPrimAPI_MakeCylinder(Ax2, 500,2000); // second Shape = Cone middlePoint = gp_Pnt(0, 0, 0); direction = gp_Dir(1, 0, 0); Ax2 = gp_Ax2(middlePoint, direction); //Shape2 = BRepPrimAPI_MakeCone(Ax2, 0.0635114, 0, 0.309304); aBoxShape = BRepPrimAPI_MakeBox(2000,1000,2000); //TopoDS_Shape aFuseShape = BRepAlgoAPI_Fuse(aCylinderShape, aBoxShape); //TopoDS_Shape aFuseShape = BRepAlgoAPI_Cut(aCylinderShape, aBoxShape); TopoDS_Shape aFuseShape = BRepAlgoAPI_Common(aCylinderShape, aBoxShape);
 George Feng 2012/07/04 19:18 A similar problem is found and still not resolved, where OutlineVCompound also only contains part of the outline and part of outline is appeared in VCompound. http://www.opencascade.org/org/forum/thread_18901/?forum=3     ;