1 // Copyright (c) 1995-1999 Matra Datavision
2 // Copyright (c) 1999-2012 OPEN CASCADE SAS
4 // The content of this file is subject to the Open CASCADE Technology Public
5 // License Version 6.5 (the "License"). You may not use the content of this file
6 // except in compliance with the License. Please obtain a copy of the License
7 // at http://www.opencascade.org and read it completely before using this file.
9 // The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
10 // main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
12 // The Original Code and all software distributed under the License is
13 // distributed on an "AS IS" basis, without warranty of any kind, and the
14 // Initial Developer hereby disclaims all such warranties, including without
15 // limitation, any warranties of merchantability, fitness for a particular
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21 #include <Standard_DimensionError.hxx>
27 void GProp::HOperator (
31 const Standard_Real Mass,
36 gp_XYZ QG = G.XYZ() - Q.XYZ();
37 Standard_Real Ixx = QG.Y() * QG.Y() + QG.Z() * QG.Z();
38 Standard_Real Iyy = QG.X() * QG.X() + QG.Z() * QG.Z();
39 Standard_Real Izz = QG.Y() * QG.Y() + QG.X() * QG.X();
40 Standard_Real Ixy = - QG.X() * QG.Y();
41 Standard_Real Iyz = - QG.Y() * QG.Z();
42 Standard_Real Ixz = - QG.X() * QG.Z();
43 Operator.SetCols (gp_XYZ (Ixx, Ixy, Ixz), gp_XYZ (Ixy, Iyy, Iyz),
44 gp_XYZ (Ixz, Iyz, Izz));
45 Operator.Multiply (Mass);