1 // Copyright (C) 2007-2008 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
22 // SMESH SMESH_Octree : global 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 //===========================================================================
33 * \brief SMESH_Octree Constructor
34 * \param maxLevel - The level max the octree can reach (If <0 unlimited)
36 //===========================================================================
37 SMESH_Octree::SMESH_Octree (const int maxLevel, const double minBoxSize):
42 myMinBoxSize(minBoxSize),
45 myBox = new Bnd_B3d();
48 //======================================
50 * \brief SMESH_Octree Destructor
52 //======================================
53 SMESH_Octree::~SMESH_Octree ()
55 if(myChildren != NULL)
59 for(int i = 0; i<8; i++)
67 //===========================================================================
69 * \brief Set the bounding box of the Octree
70 * \param box - 3d Bounding Box of the Octree
72 //===========================================================================
73 void SMESH_Octree::setBox(const Bnd_B3d* box)
76 // myBox=new Bnd_B3d(*box);
80 //===========================================================================
82 * \brief Set box to the 3d Bounding Box of the Octree
83 * \param box - Set box to the 3d Bounding Box of the Octree
85 //===========================================================================
86 void SMESH_Octree::getBox(Bnd_B3d& box)
90 // box = new Bnd_B3d (*myBox);
94 //===========================================================================
96 * \brief Set the max level of the Octree
97 * \param maxLevel - The level max the octree can reach (If <0 unlimited)
99 //===========================================================================
100 void SMESH_Octree::setMaxLevel(const int maxLevel)
101 {myMaxLevel = maxLevel;}
104 //===========================================================================
106 * \brief Compute the bigger dimension of the box
107 * \param box - 3d Box
108 * \retval double - bigger dimension of the box
110 //===========================================================================
111 double SMESH_Octree::maxSize(const Bnd_B3d* box)
115 gp_XYZ min = box->CornerMin();
116 gp_XYZ max = box->CornerMax();
117 gp_XYZ Size = (max - min);
118 double returnVal = (Size.X()>Size.Y())?Size.X():Size.Y();
119 return (returnVal>Size.Z())?returnVal:Size.Z();
122 //=============================
124 * \brief Compute the Octree
126 //=============================
127 void SMESH_Octree::Compute()
129 // As soon as the Octree is a Leaf, I stop building his children
134 //=================================================================
136 * \brief Build the 8 children boxes and call buildChildrenData()
138 //=================================================================
139 void SMESH_Octree::buildChildren()
141 myChildren = new SMESH_Octree*[8];
143 gp_XYZ min = myBox->CornerMin();
144 gp_XYZ max = myBox->CornerMax();
145 gp_XYZ HSize = (max - min)/2.;
146 gp_XYZ mid = min + HSize;
147 gp_XYZ childHsize = HSize/2.;
149 Standard_Real XminChild, YminChild, ZminChild;
152 for (int i = 0; i < 8; i++)
154 // We build the eight boxes, we need 2 points to do that:
156 // In binary, we can write i from 0 to 7
158 // 5 is 101, it corresponds here in coordinates to ZYX
159 // If coordinate is 0 in Y-> box from Ymin to Ymid
160 // If coordinate is 1 in Y-> box from Ymid to Ymax
161 // Same scheme for X and Z
162 // I need the minChild to build the Bnd_B3d box.
164 XminChild = (i%2==0)?min.X():mid.X();
165 YminChild = ((i%4)/2==0)?min.Y():mid.Y();
166 ZminChild = (i<4)?min.Z():mid.Z();
167 minChild.SetCoord(XminChild, YminChild, ZminChild);
169 box = new Bnd_B3d(minChild+childHsize,childHsize);
170 // The child is of the same type than its father (For instance, a SMESH_OctreeNode)
171 // We allocate the memory we need for the child
172 myChildren[i] = allocateOctreeChild();
173 // and we assign to him its box.
174 myChildren[i]->setBox(box);
178 // After building the 8 boxes, we put the data into the children..
181 //After we pass to the next level of the Octree
182 for (int i = 0; i < 8; i++)
183 myChildren[i]->Compute();