This class is base class for handling overlap detection of complex sensitive entities. It provides an interface for building BVH tree for some set of entities. Thereby, each iteration of overlap detection is a traverse of BVH tree in fact. To use speed-up hierarchical structure in a custom complex sensitive entity, it is necessary to make that custom entity a descendant of this class and organize sub-entities in some container which allows referencing to elements by index. Note that methods taking index as a parameter are used for BVH build and the range of given index is [0; Size() - 1]. For example of usage see Select3D_SensitiveTriangulation. More...

#include <Select3D_SensitiveSet.hxx>

Inheritance diagram for Select3D_SensitiveSet:

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Public Member Functions
	Select3D_SensitiveSet (const Handle< SelectBasics_EntityOwner > &theOwnerId)
	Creates new empty sensitive set and its content. More...

	~Select3D_SensitiveSet ()

virtual Standard_Integer	Size () const =0
	Returns the amount of sub-entities of the complex entity. More...

virtual Select3D_BndBox3d	Box (const Standard_Integer theIdx) const =0
	Returns bounding box of sub-entity with index theIdx in sub-entity list. More...

virtual Standard_Real	Center (const Standard_Integer theIdx, const Standard_Integer theAxis) const =0
	Returns geometry center of sensitive entity index theIdx along the given axis theAxis. More...

virtual void	Swap (const Standard_Integer theIdx1, const Standard_Integer theIdx2)=0
	Swaps items with indexes theIdx1 and theIdx2. More...

virtual Standard_Boolean	Matches (SelectBasics_SelectingVolumeManager &theMgr, SelectBasics_PickResult &thePickResult) Standard_OVERRIDE
	Checks whether one or more entities of the set overlap current selecting volume. Implements the traverse of BVH tree built for the set. More...

void	BVH ()
	Builds BVH tree for sensitive set. Must be called manually to build BVH tree for any sensitive set in case if its content was initialized not in a constructor, but element by element. More...

void	MarkDirty ()
	Marks BVH tree of the set as outdated. It will be rebuild at the next call of BVH() More...

virtual Select3D_BndBox3d	BoundingBox () Standard_OVERRIDE
	Returns bounding box of the whole set. This method should be redefined in Select3D_SensitiveSet descendants. More...

virtual gp_Pnt	CenterOfGeometry () const Standard_OVERRIDE
	Returns center of the whole set. This method should be redefined in Select3D_SensitiveSet descendants. More...

virtual void	Clear () Standard_OVERRIDE
	Destroys cross-reference to avoid memory leak. More...

Standard_Integer	GetLeafNodeSize () const
	Returns a number of nodes in 1 BVH leaf. More...

Public Member Functions inherited from Select3D_SensitiveEntity
virtual Handle < Select3D_SensitiveEntity >	GetConnected ()
	Originally this method intended to return sensitive entity with new location aLocation, but currently sensitive entities do not hold a location, instead HasLocation() and Location() methods call corresponding entity owner's methods. Thus all entities returned by GetConnected() share the same location propagated from corresponding selectable object. You must redefine this function for any type of sensitive entity which can accept another connected sensitive entity.//can be connected to another sensitive entity. More...

virtual Standard_Integer	NbSubElements ()=0
	Returns the number of sub-entities or elements in sensitive entity. Is used to determine if entity is complex and needs to pre-build BVH at the creation of sensitive entity step or is light-weighted so the tree can be build on demand with unnoticeable delay. More...

Public Member Functions inherited from SelectBasics_SensitiveEntity
virtual void	Set (const Handle< SelectBasics_EntityOwner > &theOwnerId)
	Sets owner of the entity. More...

const Handle < SelectBasics_EntityOwner > &	OwnerId () const
	Returns pointer to owner of the entity. More...

Standard_Real	SensitivityFactor () const
	allows a better sensitivity for a specific entity in selection algorithms useful for small sized entities. More...

Public Member Functions inherited from MMgt_TShared
virtual void	Delete () const
	Memory deallocator for transient classes. More...

Public Member Functions inherited from Standard_Transient
	Standard_Transient ()
	Empty constructor. More...

	Standard_Transient (const Standard_Transient &)
	Copy constructor – does nothing. More...

Standard_Transient &	operator= (const Standard_Transient &)
	Assignment operator, needed to avoid copying reference counter. More...

virtual	~Standard_Transient ()
	Destructor must be virtual. More...

virtual const Handle_Standard_Type &	DynamicType () const
	Returns a type information object about this object. More...

Standard_Boolean	IsInstance (const 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 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...

virtual Handle_Standard_Transient	This () const
	Returns a Handle which references this object. Must never be called to objects created in stack. More...

Standard_Integer	GetRefCount () const
	Get the reference counter of this object. More...

Protected Member Functions
virtual Standard_Boolean	overlapsElement (SelectBasics_SelectingVolumeManager &theMgr, Standard_Integer theElemIdx, Standard_Real &theMatchDepth)=0
	Checks whether the entity with index theIdx overlaps the current selecting volume. More...

virtual Standard_Boolean	elementIsInside (SelectBasics_SelectingVolumeManager &theMgr, const Standard_Integer theElemIdx)=0
	Checks whether the entity with index theIdx is inside the current selecting volume. More...

virtual Standard_Real	distanceToCOG (SelectBasics_SelectingVolumeManager &theMgr)=0
	Calculates distance from the 3d projection of used-picked screen point to center of the geometry. More...

Protected Member Functions inherited from Select3D_SensitiveEntity
	Select3D_SensitiveEntity (const Handle< SelectBasics_EntityOwner > &theOwnerId)

Protected Member Functions inherited from SelectBasics_SensitiveEntity
	SelectBasics_SensitiveEntity (const Handle< SelectBasics_EntityOwner > &theOwnerId, const Standard_Real theSensFactor=2.0)

void	SetSensitivityFactor (const Standard_Real theSensFactor)
	Allows to manage the sensitivity of the entity. More...

Protected Attributes
Standard_Integer	myDetectedIdx
	Index of detected primitive in BVH sorted primitive array, for debug purposes. More...

Protected Attributes inherited from SelectBasics_SensitiveEntity
Handle< SelectBasics_EntityOwner >	myOwnerId

Detailed Description

This class is base class for handling overlap detection of complex sensitive entities. It provides an interface for building BVH tree for some set of entities. Thereby, each iteration of overlap detection is a traverse of BVH tree in fact. To use speed-up hierarchical structure in a custom complex sensitive entity, it is necessary to make that custom entity a descendant of this class and organize sub-entities in some container which allows referencing to elements by index. Note that methods taking index as a parameter are used for BVH build and the range of given index is [0; Size() - 1]. For example of usage see Select3D_SensitiveTriangulation.

Constructor & Destructor Documentation

Select3D_SensitiveSet::Select3D_SensitiveSet ( const Handle< SelectBasics_EntityOwner > & theOwnerId )

Creates new empty sensitive set and its content.

Select3D_SensitiveSet::~Select3D_SensitiveSet ( )

inline

Member Function Documentation

virtual Select3D_BndBox3d Select3D_SensitiveSet::BoundingBox ( )

virtual

Returns bounding box of the whole set. This method should be redefined in Select3D_SensitiveSet descendants.

Implements Select3D_SensitiveEntity.

Reimplemented in Select3D_SensitiveTriangulation, Select3D_SensitiveGroup, Select3D_SensitivePoly, Select3D_InteriorSensitivePointSet, and Select3D_SensitiveWire.

virtual Select3D_BndBox3d Select3D_SensitiveSet::Box ( const Standard_Integer theIdx ) const

pure virtual

Returns bounding box of sub-entity with index theIdx in sub-entity list.

Implemented in Select3D_SensitiveGroup, Select3D_SensitiveTriangulation, Select3D_SensitivePoly, Select3D_SensitiveWire, and Select3D_InteriorSensitivePointSet.

void Select3D_SensitiveSet::BVH ( )

virtual

Builds BVH tree for sensitive set. Must be called manually to build BVH tree for any sensitive set in case if its content was initialized not in a constructor, but element by element.

Reimplemented from Select3D_SensitiveEntity.

virtual Standard_Real Select3D_SensitiveSet::Center	(	const Standard_Integer	theIdx,
		const Standard_Integer	theAxis
	)		const

pure virtual

Returns geometry center of sensitive entity index theIdx along the given axis theAxis.

Implemented in Select3D_SensitiveGroup, Select3D_SensitiveTriangulation, Select3D_SensitivePoly, Select3D_SensitiveWire, and Select3D_InteriorSensitivePointSet.

virtual gp_Pnt Select3D_SensitiveSet::CenterOfGeometry ( ) const

virtual

Returns center of the whole set. This method should be redefined in Select3D_SensitiveSet descendants.

Implements Select3D_SensitiveEntity.

Reimplemented in Select3D_SensitiveTriangulation, Select3D_SensitiveGroup, Select3D_SensitiveCircle, Select3D_SensitivePoly, Select3D_InteriorSensitivePointSet, and Select3D_SensitiveWire.

virtual void Select3D_SensitiveSet::Clear ( )

virtual

Destroys cross-reference to avoid memory leak.

Reimplemented from Select3D_SensitiveEntity.

Reimplemented in Select3D_SensitiveGroup.

virtual Standard_Real Select3D_SensitiveSet::distanceToCOG ( SelectBasics_SelectingVolumeManager & theMgr )

protectedpure virtual

Calculates distance from the 3d projection of used-picked screen point to center of the geometry.

Implemented in Select3D_SensitiveWire, and Select3D_InteriorSensitivePointSet.

virtual Standard_Boolean Select3D_SensitiveSet::elementIsInside	(	SelectBasics_SelectingVolumeManager &	theMgr,
		const Standard_Integer	theElemIdx
	)

protectedpure virtual

Checks whether the entity with index theIdx is inside the current selecting volume.

Implemented in Select3D_SensitiveWire, and Select3D_InteriorSensitivePointSet.

Standard_Integer Select3D_SensitiveSet::GetLeafNodeSize ( ) const

Returns a number of nodes in 1 BVH leaf.

void Select3D_SensitiveSet::MarkDirty ( )

Marks BVH tree of the set as outdated. It will be rebuild at the next call of BVH()

virtual Standard_Boolean Select3D_SensitiveSet::Matches	(	SelectBasics_SelectingVolumeManager &	theMgr,
		SelectBasics_PickResult &	thePickResult
	)

virtual

Checks whether one or more entities of the set overlap current selecting volume. Implements the traverse of BVH tree built for the set.

Reimplemented from Select3D_SensitiveEntity.

Reimplemented in Select3D_SensitiveCircle, and Select3D_SensitiveGroup.

virtual Standard_Boolean Select3D_SensitiveSet::overlapsElement	(	SelectBasics_SelectingVolumeManager &	theMgr,
		Standard_Integer	theElemIdx,
		Standard_Real &	theMatchDepth
	)