1 // Copyright (C) 2007-2012 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.
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 : global 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 <Bnd_B3d.hxx>
35 class SMESHUtils_EXPORT SMESH_Octree {
39 // Data limiting the tree height
41 // MaxLevel of the Octree
43 // Minimal size of the Box
47 // maxLevel-> 8^8 = 16777216 terminal trees
48 // minSize -> box size not checked
49 Limit(int maxLevel=8, double minSize=0.):myMaxLevel(maxLevel),myMinBoxSize(minSize) {}
50 virtual ~Limit() {} // it can be inherited
53 // Constructor. limit must be provided at tree root construction.
54 // limit will be deleted by SMESH_Octree
55 SMESH_Octree (Limit* limit=0);
58 virtual ~SMESH_Octree ();
60 // Compute the Octree. Must be called by constructor of inheriting class
63 // Tell if Octree is a leaf or not.
64 // An inheriting class can influence it via myIsLeaf protected field
68 int level() const { return myLevel; }
70 // Get box to the 3d Bounding Box of the Octree
71 const Bnd_B3d& getBox() const { return *myBox; }
73 // Compute the bigger dimension of my box
74 double maxSize() const;
76 // Return index of a child the given point is in
77 inline int getChildIndex(double x, double y, double z, const gp_XYZ& boxMiddle)const;
79 // Return height of the tree, full or from this level to topest leaf
80 int getHeight(const bool full=true) const;
83 // Return box of the whole tree
84 virtual Bnd_B3d* buildRootBox() = 0;
86 // Constructor for children
87 virtual SMESH_Octree* allocateOctreeChild() const = 0;
89 // Build the data in the 8 children
90 virtual void buildChildrenData() = 0;
94 // Array of 8 Octree children
95 SMESH_Octree** myChildren;
97 // Point the father, set to NULL for the level 0
98 SMESH_Octree* myFather;
100 // Tell us if the Octree is a leaf or not
104 const Limit* myLimit;
107 // Build the 8 children boxes recursively
108 void buildChildren();
110 // Level of the Octree
116 //================================================================================
118 * \brief Return index of a child the given point is in
120 //================================================================================
122 inline int SMESH_Octree::getChildIndex(double x, double y, double z, const gp_XYZ& mid) const
124 return (x > mid.X()) + ( y > mid.Y())*2 + (z > mid.Z())*4;