1 // Copyright (C) 2007-2021 CEA/DEN, EDF R&D, OPEN CASCADE
3 // Copyright (C) 2003-2007 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, or (at your option) any later version.
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.salome-platform.org/ or email : webmaster.salome@opencascade.com
23 // SMESH SMESH_Octree : Octree implementation
24 // File : SMESH_Octree.cxx
25 // Created : Tue Jan 16 16:00:00 2007
26 // Author : Nicolas Geimer & Aurélien Motteux(OCC)
29 #include "SMESH_Octree.hxx"
31 #include <Precision.hxx>
34 //===========================================================================
36 * Constructor. limit must be provided at tree root construction.
37 * limit will be deleted by SMESH_Octree.
39 //===========================================================================
41 SMESH_Octree::SMESH_Octree (SMESH_TreeLimit* limit): TBaseTree( limit )
45 //=================================================================
47 * \brief Allocate a bndbox according to childIndex. childIndex is zero based
49 //=================================================================
51 Bnd_B3d* SMESH_Octree::newChildBox(int childIndex) const
53 gp_XYZ min = getBox()->CornerMin();
54 gp_XYZ max = getBox()->CornerMax();
55 gp_XYZ HSize = (max - min)/2.;
56 gp_XYZ childHsize = HSize/2.;
58 gp_XYZ minChild( min.X() + childIndex%2 * HSize.X(),
59 min.Y() + (childIndex%4)/2 * HSize.Y(),
60 min.Z() + ( childIndex>=4 ) * HSize.Z());
62 return new Bnd_B3d(minChild+childHsize,childHsize);
65 //===========================================================================
67 * \brief Compute the bigger dimension of my box
69 //===========================================================================
71 double SMESH_Octree::maxSize() const
73 if ( getBox() && !getBox()->IsVoid() )
75 gp_XYZ min = getBox()->CornerMin();
76 gp_XYZ max = getBox()->CornerMax();
77 gp_XYZ Size = (max - min);
78 double returnVal = (Size.X()>Size.Y())?Size.X():Size.Y();
79 return (returnVal>Size.Z())?returnVal:Size.Z();
84 //================================================================================
86 * \brief Change size of a box by a factor; each dimension changes independently of others
88 //================================================================================
90 void SMESH_Octree::enlargeByFactor( Bnd_B3d* box, double factor ) const
94 gp_XYZ halfSize = 0.5 * ( box->CornerMax() - box->CornerMin() );
95 for ( int iDim = 1; iDim <= 3; ++iDim )
97 double newHSize = factor * halfSize.Coord( iDim );
98 if ( newHSize < std::numeric_limits<double>::min() )
99 newHSize = Precision::Confusion(); // 1.e-7
100 halfSize.SetCoord( iDim, newHSize );
102 box->SetHSize( halfSize );