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Documentation                       Search   NL3D::CQuadTree Class Template Reference class: CQuadTree. More... #include <quad_tree.h> List of all members. Public Methods   CQuadTree ()   Default constructor, use axes XZ. More...   ~CQuadTree ()   dtor. More... Initialization void  changeBase (const NLMISC::CMatrix &base)   Change the base matrix of the quad tree. More... void  create (uint DepthMax, const NLMISC::CVector &center, float size)   Init the container. More... Container operation void  clear ()   Clear the container. Elements are deleted, and the quadtree too (create() is undone). More... void  eraseAll ()   Erase all elements from the container. More... void  erase (CIterator it)   Erase an interator from the container. More... CIterator  insert (const NLMISC::CVector &bboxmin, const NLMISC::CVector &bboxmax, const T &val)   Insert a new element in the container. More... Selection void  clearSelection ()   Clear the selection list. More... void  selectAll ()   Select all the container. More... void  select (const NLMISC::CVector &bboxmin, const NLMISC::CVector &bboxmax)   Select element intersecting a bounding box. More... void  select (const std::vector< NLMISC::CPlane > &BVolume)   Select element with multiple planes. More... void  selectRay (const NLMISC::CVector &source, const NLMISC::CVector &dir)   Select element with a ray. More... void  selectSegment (const NLMISC::CVector &source, const NLMISC::CVector &dest)   Select element with a segment. More... CIterator  begin ()   Return the first iterator of the selected element list. More... CIterator  end ()   Return the end iterator of the selected element list. More... Private Attributes CQuadNode  _QuadRoot CBaseNode  _Selection uint  _DepthMax float  _Size NLMISC::CMatrix  _ChangeBasis Friends class  CIterator class  CConstIterator Detailed Description template<class T> class NL3D::CQuadTree< T > class: CQuadTree. A template CQuadTree. This first implementation support real-time quad node split, but never merge the quad node. The possibility to merge (delete) empty quads, when an element erase occurs, will be added later. The quadtree is geometrically delimited. By default, his size is 1*1, centered on (0,0,0). If an element which is out this zone is inserted, then it will ALWAYS be considered selected in select*() methods. By default, the quad tree is aligned on XZ. Sample code using CQuadTree: // My quad tree CQuadTree<myType> quadTree; // My min and max BoundingBox corner of each element CVector minPoint[elementCount]=...; CVector maxPoint[elementCount]=...; // My values myType value[elementCount]=...; // Init the quadTree with recursions depth = 6 (so max 64*64 cells) // centered in (0,0,0) with a max size of 10 in the plane XZ quadTree.create (6, CVector (0.f, 0.f, 0.f), 10.f); // Insert element in the quadTree for (int i=0; i<elementCount; i++) quadTree.insert (minPoint[i], maxPoint[i], value[i]); // [...] // Clear the selection quadTree.clearSelection (); // Select an element with the X axis as a 3d ray quadTree.selectRay (CVector (0,0,0), CVector (1,0,0)); // Get first selected nodes.. CQuadTree<myType>::CIterator it=quadTree.begin(); while (it!=quadTree.end()) { // Check what you want... // Next selected element it++; } Definition at line 96 of file quad_tree.h. Constructor & Destructor Documentation template<class T> NL3D::CQuadTree< T >::CQuadTree (    )    Default constructor, use axes XZ. Definition at line 658 of file quad_tree.h. References _ChangeBasis, _DepthMax, _QuadRoot, _Selection, _Size, NL3D::CQuadTree::CQuadNode::BBoxMax, NL3D::CQuadTree::CQuadNode::BBoxMin, NLMISC::CMatrix::identity, NL3D::CQuadTree::CBaseNode::Next, and NLMISC::CVector::set. template<class T> NL3D::CQuadTree< T >::~CQuadTree< T > (    )    dtor. Member Function Documentation template<class T> CQuadTree< T >::CIterator NL3D::CQuadTree< T >::begin (    )    Return the first iterator of the selected element list. begin and end are valid till the next insert. Definition at line 884 of file quad_tree.h. References _Selection, and NL3D::CQuadTree::CBaseNode::Next. Referenced by eraseAll. template<class T> void NL3D::CQuadTree< T >::changeBase (  const NLMISC::CMatrix &    base )    Change the base matrix of the quad tree. For exemple this code init the quad tree in the plane XY: CQuadTree quadTree; NLMISC::CMatrix tmp; NLMISC::CVector I(1,0,0); NLMISC::CVector J(0,0,-1); NLMISC::CVector K(0,1,0); tmp.identity(); tmp.setRot(I,J,K, true); quadTree.changeBase (tmp); Parameters: base  Base of the quad tree Definition at line 669 of file quad_tree.h. References _ChangeBasis. template<class T> void NL3D::CQuadTree< T >::clear (    )    Clear the container. Elements are deleted, and the quadtree too (create() is undone). Definition at line 679 of file quad_tree.h. References _QuadRoot, _Selection, NL3D::CQuadTree::CQuadNode::clear, and NL3D::CQuadTree::CBaseNode::Next. Referenced by create. template<class T> void NL3D::CQuadTree< T >::clearSelection (    )    Clear the selection list. Definition at line 775 of file quad_tree.h. References _Selection, and NL3D::CQuadTree::CBaseNode::Next. Referenced by select, and selectAll. template<class T> void NL3D::CQuadTree< T >::create (  uint    DepthMax, const NLMISC::CVector &    center, float    size )    Init the container. Parameters: DepthMax  is the max depth in the tree. The max cell count is (1<<DepthMax)^2 center  is the center of the quad tree size  is the width and the height of the initial quad tree. Definition at line 685 of file quad_tree.h. References _ChangeBasis, _DepthMax, _QuadRoot, _Size, NL3D::CQuadTree::CQuadNode::BBoxMax, NL3D::CQuadTree::CQuadNode::BBoxMin, and clear. template<class T> CQuadTree< T >::CIterator NL3D::CQuadTree< T >::end (    )    Return the end iterator of the selected element list. begin and end are valid till the next insert. Definition at line 889 of file quad_tree.h. References CIterator. Referenced by eraseAll. template<class T> void NL3D::CQuadTree< T >::erase (  CIterator    it )    Erase an interator from the container. Parameters: it  is the iterator to erase. Definition at line 723 of file quad_tree.h. Referenced by eraseAll. template<class T> void NL3D::CQuadTree< T >::eraseAll (    )    Erase all elements from the container. Definition at line 704 of file quad_tree.h. References begin, CIterator, end, erase, and selectAll. template<class T> CQuadTree< T >::CIterator NL3D::CQuadTree< T >::insert (  const NLMISC::CVector &    bboxmin, const NLMISC::CVector &    bboxmax, const T &    val )    Insert a new element in the container. The bounding box of the element MUST be included in the bounding box of the quadtree. Parameters: bboxmin  is the corner of the bounding box of the element to insert with minimal coordinates. bboxmax  is the corner of the bounding box of the element to insert with maximal coordinates. val  is a reference on the value to insert Definition at line 736 of file quad_tree.h. References _ChangeBasis, _DepthMax, _QuadRoot, _Size, CIterator, NL3D::CQuadTree::CQuadNode::insert, nlassert, NLMISC::CVector::x, NLMISC::CVector::y, and NLMISC::CVector::z. template<class T> void NL3D::CQuadTree< T >::select (  const std::vector< NLMISC::CPlane > &    BVolume )    Select element with multiple planes. Intersect with a polytope convex made of planes. The normals of planes must be directed outwards the polytope. Parameters: BVolume  is a plane vector Definition at line 804 of file quad_tree.h. References _QuadRoot, _Selection, clearSelection, and NL3D::CQuadTree::CQuadNode::select. template<class T> void NL3D::CQuadTree< T >::select (  const NLMISC::CVector &    bboxmin, const NLMISC::CVector &    bboxmax )    Select element intersecting a bounding box. Parameters: bboxmin  is the corner of the bounding box used to select bboxmax  is the corner of the bounding box used to select Definition at line 793 of file quad_tree.h. References _ChangeBasis, _QuadRoot, _Selection, clearSelection, NL3D::CQuadTree::CQuadNode::select, NLMISC::CVector::x, NLMISC::CVector::y, and NLMISC::CVector::z. Referenced by selectRay, and selectSegment. template<class T> void NL3D::CQuadTree< T >::selectAll (    )    Select all the container. Definition at line 787 of file quad_tree.h. References _QuadRoot, _Selection, clearSelection, and NL3D::CQuadTree::CQuadNode::selectAll. Referenced by eraseAll. template<class T> void NL3D::CQuadTree< T >::selectRay (  const NLMISC::CVector &    source, const NLMISC::CVector &    dir )    Select element with a ray. Parameters: source  is a point in the ray dir  is the direction off the ray Definition at line 817 of file quad_tree.h. References NLMISC::CMatrix::getJ, NLMISC::CMatrix::getK, NLMISC::CMatrix::identity, NLMISC::CPlane::make, NLMISC::CMatrix::normalize, select, NLMISC::CMatrix::setRot, and NLMISC::CMatrix::XYZ. template<class T> void NL3D::CQuadTree< T >::selectSegment (  const NLMISC::CVector &    source, const NLMISC::CVector &    dest )    Select element with a segment. Parameters: source  is the source of the segment dest  is the destination of the segment Definition at line 848 of file quad_tree.h. References NLMISC::CMatrix::getI, NLMISC::CMatrix::getJ, NLMISC::CMatrix::getK, NLMISC::CMatrix::identity, NLMISC::CPlane::make, NLMISC::CMatrix::normalize, select, NLMISC::CMatrix::setRot, and NLMISC::CMatrix::XYZ. Friends And Related Function Documentation template<class T> friend class CConstIterator [friend]   Definition at line 105 of file quad_tree.h. template<class T> friend class CIterator [friend]   Definition at line 102 of file quad_tree.h. Referenced by end, eraseAll, and insert. Member Data Documentation template<class T> NLMISC::CMatrix NL3D::CQuadTree::_ChangeBasis [private]   Definition at line 581 of file quad_tree.h. Referenced by changeBase, CQuadTree, create, insert, and select. template<class T> uint NL3D::CQuadTree::_DepthMax [private]   Definition at line 579 of file quad_tree.h. Referenced by CQuadTree, create, and insert. template<class T> CQuadNode NL3D::CQuadTree::_QuadRoot [private]   Definition at line 577 of file quad_tree.h. Referenced by clear, CQuadTree, create, insert, select, and selectAll. template<class T> CBaseNode NL3D::CQuadTree::_Selection [private]   Definition at line 578 of file quad_tree.h. Referenced by begin, clear, clearSelection, CQuadTree, select, and selectAll. template<class T> float NL3D::CQuadTree::_Size [private]   Definition at line 580 of file quad_tree.h. Referenced by CQuadTree, create, and insert. The documentation for this class was generated from the following file: quad_tree.h