Open CASCADE Technology  7.2.0

BVH_TreeBase< T, N > Class Template Reference

Stores parameters of bounding volume hierarchy (BVH). Bounding volume hierarchy (BVH) organizes geometric objects in the tree based on spatial relationships. Each node in the tree contains an axis-aligned bounding box of all the objects below it. Bounding volume hierarchies are used in many algorithms to support efficient operations on the sets of geometric objects, such as collision detection, ray-tracing, searching of nearest objects, and view frustum culling. More...

#include <BVH_Tree.hxx>

Inheritance diagram for BVH_TreeBase< T, N >:
Inheritance graph
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Public Types

custom data types
typedef BVH_Box< T, N >::BVH_VecNt BVH_VecNt
 
- Public Types inherited from Standard_Transient
typedef void base_type
 Returns a type descriptor about this object. More...
 

Public Member Functions

general methods
 BVH_TreeBase ()
 Creates new empty BVH tree. More...
 
virtual ~BVH_TreeBase ()
 Releases resources of BVH tree. More...
 
int Depth () const
 Returns depth (height) of BVH tree. More...
 
int Length () const
 Returns total number of BVH tree nodes. More...
 
methods for accessing individual nodes
BVH_VecNtMinPoint (const int theNodeIndex)
 Returns minimum point of the given node. More...
 
BVH_VecNtMaxPoint (const int theNodeIndex)
 Returns maximum point of the given node. More...
 
const BVH_VecNtMinPoint (const int theNodeIndex) const
 Returns minimum point of the given node. More...
 
const BVH_VecNtMaxPoint (const int theNodeIndex) const
 Returns maximum point of the given node. More...
 
int & BegPrimitive (const int theNodeIndex)
 Returns index of first primitive of the given leaf node. More...
 
int & EndPrimitive (const int theNodeIndex)
 Returns index of last primitive of the given leaf node. More...
 
int BegPrimitive (const int theNodeIndex) const
 Returns index of first primitive of the given leaf node. More...
 
int EndPrimitive (const int theNodeIndex) const
 Returns index of last primitive of the given leaf node. More...
 
int NbPrimitives (const int theNodeIndex) const
 Returns number of primitives in the given leaf node. More...
 
int & Level (const int theNodeIndex)
 Returns level (depth) of the given node. More...
 
int Level (const int theNodeIndex) const
 Returns level (depth) of the given node. More...
 
bool IsOuter (const int theNodeIndex) const
 Checks whether the given node is outer. More...
 
methods for accessing serialized tree data
BVH_Array4iNodeInfoBuffer ()
 Returns array of node data records. More...
 
const BVH_Array4iNodeInfoBuffer () const
 Returns array of node data records. More...
 
BVH::ArrayType< T, N >::Type & MinPointBuffer ()
 Returns array of node minimum points. More...
 
BVH::ArrayType< T, N >::Type & MaxPointBuffer ()
 Returns array of node maximum points. More...
 
const BVH::ArrayType< T, N >::Type & MinPointBuffer () const
 Returns array of node minimum points. More...
 
const BVH::ArrayType< T, N >::Type & MaxPointBuffer () const
 Returns array of node maximum points. More...
 
- Public Member Functions inherited from Standard_Transient
 Standard_Transient ()
 Empty constructor. More...
 
 Standard_Transient (const Standard_Transient &)
 Copy constructor – does nothing. More...
 
Standard_Transientoperator= (const Standard_Transient &)
 Assignment operator, needed to avoid copying reference counter. More...
 
virtual ~Standard_Transient ()
 Destructor must be virtual. More...
 
virtual void Delete () const
 Memory deallocator for transient classes. More...
 
virtual const opencascade::handle< Standard_Type > & DynamicType () const
 Returns a type descriptor about this object. More...
 
Standard_Boolean IsInstance (const opencascade::handle< Standard_Type > &theType) const
 Returns a true value if this is an instance of Type. More...
 
Standard_Boolean IsInstance (const Standard_CString theTypeName) const
 Returns a true value if this is an instance of TypeName. More...
 
Standard_Boolean IsKind (const opencascade::handle< Standard_Type > &theType) const
 Returns true if this is an instance of Type or an instance of any class that inherits from Type. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More...
 
Standard_Boolean IsKind (const Standard_CString theTypeName) const
 Returns true if this is an instance of TypeName or an instance of any class that inherits from TypeName. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More...
 
Standard_TransientThis () const
 Returns non-const pointer to this object (like const_cast). For protection against creating handle to objects allocated in stack or call from constructor, it will raise exception Standard_ProgramError if reference counter is zero. More...
 
Standard_Integer GetRefCount () const
 Get the reference counter of this object. More...
 
void IncrementRefCounter () const
 Increments the reference counter of this object. More...
 
Standard_Integer DecrementRefCounter () const
 Decrements the reference counter of this object; returns the decremented value. More...
 

Data Fields

protected fields
BVH_Array4i myNodeInfoBuffer
 Array of node data records. More...
 
BVH::ArrayType< T, N >::Type myMinPointBuffer
 Array of node minimum points. More...
 
BVH::ArrayType< T, N >::Type myMaxPointBuffer
 Array of node maximum points. More...
 
int myDepth
 Current depth of BVH tree (set by builder). More...
 

Additional Inherited Members

- Static Public Member Functions inherited from Standard_Transient
static const char * get_type_name ()
 Returns a type descriptor about this object. More...
 
static const opencascade::handle< Standard_Type > & get_type_descriptor ()
 Returns type descriptor of Standard_Transient class. More...
 
- Protected Member Functions inherited from BVH_TreeBaseTransient
 BVH_TreeBaseTransient ()
 

Detailed Description

template<class T, int N>
class BVH_TreeBase< T, N >

Stores parameters of bounding volume hierarchy (BVH). Bounding volume hierarchy (BVH) organizes geometric objects in the tree based on spatial relationships. Each node in the tree contains an axis-aligned bounding box of all the objects below it. Bounding volume hierarchies are used in many algorithms to support efficient operations on the sets of geometric objects, such as collision detection, ray-tracing, searching of nearest objects, and view frustum culling.

Member Typedef Documentation

◆ BVH_VecNt

template<class T, int N>
typedef BVH_Box<T, N>::BVH_VecNt BVH_TreeBase< T, N >::BVH_VecNt

Constructor & Destructor Documentation

◆ BVH_TreeBase()

template<class T, int N>
BVH_TreeBase< T, N >::BVH_TreeBase ( )
inline

Creates new empty BVH tree.

◆ ~BVH_TreeBase()

template<class T, int N>
virtual BVH_TreeBase< T, N >::~BVH_TreeBase ( )
inlinevirtual

Releases resources of BVH tree.

Member Function Documentation

◆ BegPrimitive() [1/2]

template<class T, int N>
int& BVH_TreeBase< T, N >::BegPrimitive ( const int  theNodeIndex)
inline

Returns index of first primitive of the given leaf node.

◆ BegPrimitive() [2/2]

template<class T, int N>
int BVH_TreeBase< T, N >::BegPrimitive ( const int  theNodeIndex) const
inline

Returns index of first primitive of the given leaf node.

◆ Depth()

template<class T, int N>
int BVH_TreeBase< T, N >::Depth ( ) const
inline

Returns depth (height) of BVH tree.

◆ EndPrimitive() [1/2]

template<class T, int N>
int& BVH_TreeBase< T, N >::EndPrimitive ( const int  theNodeIndex)
inline

Returns index of last primitive of the given leaf node.

◆ EndPrimitive() [2/2]

template<class T, int N>
int BVH_TreeBase< T, N >::EndPrimitive ( const int  theNodeIndex) const
inline

Returns index of last primitive of the given leaf node.

◆ IsOuter()

template<class T, int N>
bool BVH_TreeBase< T, N >::IsOuter ( const int  theNodeIndex) const
inline

Checks whether the given node is outer.

◆ Length()

template<class T, int N>
int BVH_TreeBase< T, N >::Length ( void  ) const
inline

Returns total number of BVH tree nodes.

◆ Level() [1/2]

template<class T, int N>
int& BVH_TreeBase< T, N >::Level ( const int  theNodeIndex)
inline

Returns level (depth) of the given node.

◆ Level() [2/2]

template<class T, int N>
int BVH_TreeBase< T, N >::Level ( const int  theNodeIndex) const
inline

Returns level (depth) of the given node.

◆ MaxPoint() [1/2]

template<class T, int N>
BVH_VecNt& BVH_TreeBase< T, N >::MaxPoint ( const int  theNodeIndex)
inline

Returns maximum point of the given node.

◆ MaxPoint() [2/2]

template<class T, int N>
const BVH_VecNt& BVH_TreeBase< T, N >::MaxPoint ( const int  theNodeIndex) const
inline

Returns maximum point of the given node.

◆ MaxPointBuffer() [1/2]

template<class T, int N>
BVH::ArrayType<T, N>::Type& BVH_TreeBase< T, N >::MaxPointBuffer ( )
inline

Returns array of node maximum points.

◆ MaxPointBuffer() [2/2]

template<class T, int N>
const BVH::ArrayType<T, N>::Type& BVH_TreeBase< T, N >::MaxPointBuffer ( ) const
inline

Returns array of node maximum points.

◆ MinPoint() [1/2]

template<class T, int N>
BVH_VecNt& BVH_TreeBase< T, N >::MinPoint ( const int  theNodeIndex)
inline

Returns minimum point of the given node.

◆ MinPoint() [2/2]

template<class T, int N>
const BVH_VecNt& BVH_TreeBase< T, N >::MinPoint ( const int  theNodeIndex) const
inline

Returns minimum point of the given node.

◆ MinPointBuffer() [1/2]

template<class T, int N>
BVH::ArrayType<T, N>::Type& BVH_TreeBase< T, N >::MinPointBuffer ( )
inline

Returns array of node minimum points.

◆ MinPointBuffer() [2/2]

template<class T, int N>
const BVH::ArrayType<T, N>::Type& BVH_TreeBase< T, N >::MinPointBuffer ( ) const
inline

Returns array of node minimum points.

◆ NbPrimitives()

template<class T, int N>
int BVH_TreeBase< T, N >::NbPrimitives ( const int  theNodeIndex) const
inline

Returns number of primitives in the given leaf node.

◆ NodeInfoBuffer() [1/2]

template<class T, int N>
BVH_Array4i& BVH_TreeBase< T, N >::NodeInfoBuffer ( )
inline

Returns array of node data records.

◆ NodeInfoBuffer() [2/2]

template<class T, int N>
const BVH_Array4i& BVH_TreeBase< T, N >::NodeInfoBuffer ( ) const
inline

Returns array of node data records.

Field Documentation

◆ myDepth

template<class T, int N>
int BVH_TreeBase< T, N >::myDepth

Current depth of BVH tree (set by builder).

◆ myMaxPointBuffer

template<class T, int N>
BVH::ArrayType<T, N>::Type BVH_TreeBase< T, N >::myMaxPointBuffer

Array of node maximum points.

◆ myMinPointBuffer

template<class T, int N>
BVH::ArrayType<T, N>::Type BVH_TreeBase< T, N >::myMinPointBuffer

Array of node minimum points.

◆ myNodeInfoBuffer

template<class T, int N>
BVH_Array4i BVH_TreeBase< T, N >::myNodeInfoBuffer

Array of node data records.


The documentation for this class was generated from the following file: