// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
//
-// SMESH SMESH_Octree : global Octree implementation
+// SMESH SMESH_Octree : Octree implementation
// File : SMESH_Octree.cxx
// Created : Tue Jan 16 16:00:00 2007
// Author : Nicolas Geimer & Aurélien Motteux(OCC)
*/
//===========================================================================
-SMESH_Octree::SMESH_Octree (SMESH_Octree::Limit* limit):
- myChildren(NULL),
- myFather(NULL),
- myIsLeaf( false ),
- myLimit( limit ),
- myLevel(0),
- myBox(NULL)
+SMESH_Octree::SMESH_Octree (SMESH_TreeLimit* limit): TBaseTree( limit )
{
}
-//================================================================================
-/*!
- * \brief Compute the Octree
- */
-//================================================================================
-
-void SMESH_Octree::compute()
-{
- if ( myLevel==0 )
- {
- myBox = buildRootBox();
- if ( myLimit->myMinBoxSize > 0. && maxSize() <= myLimit->myMinBoxSize )
- myIsLeaf = true;
- else
- buildChildren();
- }
-}
-
-//======================================
-/*!
- * \brief SMESH_Octree Destructor
- */
-//======================================
-
-SMESH_Octree::~SMESH_Octree ()
-{
- if(myChildren != NULL)
- {
- if(!isLeaf())
- {
- for(int i = 0; i<8; i++)
- delete myChildren[i];
- delete[] myChildren;
- myChildren = 0;
- }
- }
- if ( myBox )
- delete myBox;
- myBox = 0;
- if ( level() == 0 )
- delete myLimit;
- myLimit = 0;
-}
-
//=================================================================
/*!
- * \brief Build the 8 children boxes and call buildChildrenData()
+ * \brief Allocate a bndbox according to childIndex. childIndex is zero based
*/
//=================================================================
-void SMESH_Octree::buildChildren()
+Bnd_B3d* SMESH_Octree::newChildBox(int childIndex) const
{
- if ( isLeaf() ) return;
-
- myChildren = new SMESH_Octree*[8];
-
- gp_XYZ min = myBox->CornerMin();
- gp_XYZ max = myBox->CornerMax();
+ gp_XYZ min = getBox()->CornerMin();
+ gp_XYZ max = getBox()->CornerMax();
gp_XYZ HSize = (max - min)/2.;
- gp_XYZ mid = min + HSize;
gp_XYZ childHsize = HSize/2.;
- // get the whole model size
- double rootSize = 0;
- {
- SMESH_Octree* root = this;
- while ( root->myLevel > 0 )
- root = root->myFather;
- rootSize = root->maxSize();
- }
- Standard_Real XminChild, YminChild, ZminChild;
- gp_XYZ minChild;
- for (int i = 0; i < 8; i++)
- {
- // We build the eight boxes, we need 2 points to do that:
- // Min and Mid
- // In binary, we can write i from 0 to 7
- // For instance :
- // 5 is 101, it corresponds here in coordinates to ZYX
- // If coordinate is 0 in Y-> box from Ymin to Ymid
- // If coordinate is 1 in Y-> box from Ymid to Ymax
- // Same scheme for X and Z
- // I need the minChild to build the Bnd_B3d box.
+ gp_XYZ minChild( min.X() + childIndex%2 * HSize.X(),
+ min.Y() + (childIndex%4)/2 * HSize.Y(),
+ min.Z() + ( childIndex>=4 ) * HSize.Z());
- XminChild = (i%2==0)?min.X():mid.X();
- YminChild = ((i%4)/2==0)?min.Y():mid.Y();
- ZminChild = (i<4)?min.Z():mid.Z();
- minChild.SetCoord(XminChild, YminChild, ZminChild);
-
- // The child is of the same type than its father (For instance, a SMESH_OctreeNode)
- // We allocate the memory we need for the child
- myChildren[i] = allocateOctreeChild();
- // and we assign to him its box.
- myChildren[i]->myFather = this;
- myChildren[i]->myLimit = myLimit;
- myChildren[i]->myLevel = myLevel + 1;
- myChildren[i]->myBox = new Bnd_B3d(minChild+childHsize,childHsize);
- myChildren[i]->myBox->Enlarge( rootSize * 1e-10 );
- if ( myLimit->myMinBoxSize > 0. && myChildren[i]->maxSize() <= myLimit->myMinBoxSize )
- myChildren[i]->myIsLeaf = true;
- }
-
- // After building the 8 boxes, we put the data into the children.
- buildChildrenData();
-
- //After we pass to the next level of the Octree
- for (int i = 0; i<8; i++)
- myChildren[i]->buildChildren();
-}
-
-//================================================================================
-/*!
- * \brief Tell if Octree is a leaf or not
- * An inheriting class can influence it via myIsLeaf protected field
- */
-//================================================================================
-
-bool SMESH_Octree::isLeaf() const
-{
- return myIsLeaf || ((myLimit->myMaxLevel > 0) ? (level() >= myLimit->myMaxLevel) : false );
+ return new Bnd_B3d(minChild+childHsize,childHsize);
}
//===========================================================================
double SMESH_Octree::maxSize() const
{
- if ( myBox && !myBox->IsVoid() )
+ if ( getBox() && !getBox()->IsVoid() )
{
- gp_XYZ min = myBox->CornerMin();
- gp_XYZ max = myBox->CornerMax();
+ gp_XYZ min = getBox()->CornerMin();
+ gp_XYZ max = getBox()->CornerMax();
gp_XYZ Size = (max - min);
double returnVal = (Size.X()>Size.Y())?Size.X():Size.Y();
return (returnVal>Size.Z())?returnVal:Size.Z();
}
return 0.;
}
-
-//================================================================================
-/*!
- * \brief Return height of the tree, full or from this level to topest leaf
- */
-//================================================================================
-
-int SMESH_Octree::getHeight(const bool full) const
-{
- if ( full && myFather )
- return myFather->getHeight( true );
-
- if ( isLeaf() )
- return 1;
-
- int heigth = 0;
- for (int i = 0; i<8; i++)
- {
- int h = myChildren[i]->getHeight( false );
- if ( h > heigth )
- heigth = h;
- }
- return heigth + 1;
-}
