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salome-gui  6.5.0
VTKViewer_Transform.cxx
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00001 // Copyright (C) 2007-2012  CEA/DEN, EDF R&D, OPEN CASCADE
00002 //
00003 // Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
00004 // CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
00005 //
00006 // This library is free software; you can redistribute it and/or
00007 // modify it under the terms of the GNU Lesser General Public
00008 // License as published by the Free Software Foundation; either
00009 // version 2.1 of the License.
00010 //
00011 // This library is distributed in the hope that it will be useful,
00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014 // Lesser General Public License for more details.
00015 //
00016 // You should have received a copy of the GNU Lesser General Public
00017 // License along with this library; if not, write to the Free Software
00018 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
00019 //
00020 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
00021 //
00022 
00023 //  SALOME FILTER : interactive object for VISU entities implementation
00024 //  File   : SALOME_Transform.cxx
00025 //  Author : Laurent CORNABE with help of Nicolas REJNERI
00026 //  Module : SALOME
00027 //
00028 #include "VTKViewer_Transform.h"
00029 
00030 #include <vtkObjectFactory.h>
00031 #include <vtkMatrix4x4.h>
00032 
00033 static double EPS = 10e-4;
00034 
00035 
00036 vtkStandardNewMacro(VTKViewer_Transform);
00037 
00039 void VTKViewer_Transform::SetMatrixScale(double theScaleX, double theScaleY, double theScaleZ){ 
00040   double aMatrix[16] = {theScaleX,0,0,0, 
00041                         0,theScaleY,0,0, 
00042                         0,0,theScaleZ,0, 
00043                         0,0,0,1.0000000};
00044   this->SetMatrix(aMatrix);
00045 }
00046 
00048 void VTKViewer_Transform::GetMatrixScale(double theScale[3]){
00049   vtkMatrix4x4 *aTMatrix=this->GetMatrix();
00050   const double aScaleX = aTMatrix->GetElement(0,0);
00051   const double aScaleY = aTMatrix->GetElement(1,1);
00052   const double aScaleZ = aTMatrix->GetElement(2,2);
00053   theScale[0] = aScaleX;
00054   theScale[1] = aScaleY;
00055   theScale[2] = aScaleZ;
00056 }
00057 
00061 int VTKViewer_Transform::IsIdentity(){ 
00062   double aScale[3];
00063   this->GetMatrixScale(aScale);
00064   return (fabs(aScale[0] - 1.0) < EPS && 
00065           fabs(aScale[1] - 1.0) < EPS && 
00066           fabs(aScale[2] - 1.0) < EPS);
00067 }