1 // Copyright (c) 1995-1999 Matra Datavision
2 // Copyright (c) 1999-2014 OPEN CASCADE SAS
4 // This file is part of Open CASCADE Technology software library.
6 // This library is free software; you can redistribute it and/or modify it under
7 // the terms of the GNU Lesser General Public License version 2.1 as published
8 // by the Free Software Foundation, with special exception defined in the file
9 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
10 // distribution for complete text of the license and disclaimer of any warranty.
12 // Alternatively, this file may be used under the terms of Open CASCADE
13 // commercial license or contractual agreement.
17 #include <Standard_DimensionError.hxx>
23 void GProp::HOperator (
27 const Standard_Real Mass,
32 gp_XYZ QG = G.XYZ() - Q.XYZ();
33 Standard_Real Ixx = QG.Y() * QG.Y() + QG.Z() * QG.Z();
34 Standard_Real Iyy = QG.X() * QG.X() + QG.Z() * QG.Z();
35 Standard_Real Izz = QG.Y() * QG.Y() + QG.X() * QG.X();
36 Standard_Real Ixy = - QG.X() * QG.Y();
37 Standard_Real Iyz = - QG.Y() * QG.Z();
38 Standard_Real Ixz = - QG.X() * QG.Z();
39 Operator.SetCols (gp_XYZ (Ixx, Ixy, Ixz), gp_XYZ (Ixy, Iyy, Iyz),
40 gp_XYZ (Ixz, Iyz, Izz));
41 Operator.Multiply (Mass);