1 // Copyright (C) 2007-2020 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.hxx
25 // Created : Tue Jan 16 16:00:00 2007
26 // Author : Nicolas Geimer & Aurélien Motteux (OCC)
29 #ifndef _SMESH_OCTREE_HXX_
30 #define _SMESH_OCTREE_HXX_
32 #include "SMESH_Utils.hxx"
33 #include "SMESH_Tree.hxx"
34 #include <Bnd_B3d.hxx>
36 //================================================================================
38 * \brief 3D tree of anything.
39 * Methods to implement in a descendant are:
40 * - Bnd_B3d* buildRootBox(); // box of a tree
41 * - descendant* newChild() const; // a new child instance
42 * - void buildChildrenData(); // distribute own data among children
44 class SMESHUtils_EXPORT SMESH_Octree : public SMESH_Tree< Bnd_B3d, 8 >
47 typedef SMESH_Tree< Bnd_B3d, 8> TBaseTree;
49 // Constructor. limit must be provided at tree root construction.
50 // limit will be deleted by SMESH_Octree
51 SMESH_Octree (SMESH_TreeLimit* limit=0);
52 virtual ~SMESH_Octree() {};
54 // Compute the bigger dimension of my box
55 double maxSize() const;
57 // Return index of a child the given point is in
58 inline static int getChildIndex(double x, double y, double z, const gp_XYZ& boxMiddle);
62 // Allocate a bndbox according to childIndex. childIndex is zero based
63 virtual Bnd_B3d* newChildBox(int childIndex) const;
65 // Change size of a box by a factor; each dimension changes independently of others
66 virtual void enlargeByFactor( Bnd_B3d* box, double factor ) const;
69 //================================================================================
71 * \brief Return index of a child the given point is in
73 inline int SMESH_Octree::getChildIndex(double x, double y, double z, const gp_XYZ& mid)
75 return (x > mid.X()) + ( y > mid.Y())*2 + (z > mid.Z())*4;