Open CASCADE Technology  6.9.0
Public Member Functions | Protected Member Functions | Protected Attributes

Select3D_SensitiveSet Class Referenceabstract

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:
Inheritance graph
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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 Marks BVH tree of the set as outdated.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_Transientoperator= (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_EntityOwnermyOwnerId
 

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
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 
)
protectedpure virtual

Checks whether the entity with index theIdx overlaps the current selecting volume.

Implemented in Select3D_SensitiveWire, and Select3D_InteriorSensitivePointSet.

virtual Standard_Integer Select3D_SensitiveSet::Size ( ) const
pure virtual

Returns the amount of sub-entities of the complex entity.

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

virtual void Select3D_SensitiveSet::Swap ( const Standard_Integer  theIdx1,
const Standard_Integer  theIdx2 
)
pure virtual

Field Documentation

Standard_Integer Select3D_SensitiveSet::myDetectedIdx
protected

Index of detected primitive in BVH sorted primitive array, for debug purposes.


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