1 // SALOME FILTER : interactive object for VISU entities implementation
3 // Copyright (C) 2003 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
4 // CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
6 // This library is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU Lesser General Public
8 // License as published by the Free Software Foundation; either
9 // version 2.1 of the License.
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 // Lesser General Public License for more details.
16 // You should have received a copy of the GNU Lesser General Public
17 // License along with this library; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 // See http://www.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org
24 // File : SALOME_Transform.cxx
25 // Author : Laurent CORNABE with help of Nicolas REJNERI
29 #include "VTKViewer_Transform.h"
31 #include <vtkObjectFactory.h>
32 #include <vtkMatrix4x4.h>
34 static double EPS = 10e-4;
37 vtkStandardNewMacro(VTKViewer_Transform);
39 /*!Sets matrix scale.*/
40 void VTKViewer_Transform::SetMatrixScale(double theScaleX, double theScaleY, double theScaleZ){
41 double aMatrix[16] = {theScaleX,0,0,0,
45 this->SetMatrix(aMatrix);
48 /*!Gets matrix scale.*/
49 void VTKViewer_Transform::GetMatrixScale(double theScale[3]){
50 vtkMatrix4x4 *aTMatrix=this->GetMatrix();
51 const double aScaleX = aTMatrix->GetElement(0,0);
52 const double aScaleY = aTMatrix->GetElement(1,1);
53 const double aScaleZ = aTMatrix->GetElement(2,2);
54 theScale[0] = aScaleX;
55 theScale[1] = aScaleY;
56 theScale[2] = aScaleZ;
59 /*!Checks: Is matrix identity, where used EPS value.
60 *If |aScaleX-1|<EPS && |aScaleY-1|<EPS && |aScaleY-1|<EPS return 1, esle 0.
62 int VTKViewer_Transform::IsIdentity(){
64 this->GetMatrixScale(aScale);
65 return (fabs(aScale[0] - 1.0) < EPS &&
66 fabs(aScale[1] - 1.0) < EPS &&
67 fabs(aScale[2] - 1.0) < EPS);