Vrml_LOD Class Reference

defines a LOD (level of detailization) node of VRML specifying properties of geometry and its appearance. This group node is used to allow applications to switch between various representations of objects automatically. The children of this node typically represent the same object or objects at the varying of Levels Of Detail (LOD), from highest detail to lowest. More...

#include <Vrml_LOD.hxx>

Inheritance diagram for Vrml_LOD:

Public Member Functions
	Vrml_LOD ()
	Vrml_LOD (const occ::handle< NCollection_HArray1< double > > &aRange, const gp_Vec &aCenter)
void	SetRange (const occ::handle< NCollection_HArray1< double > > &aRange)
occ::handle< NCollection_HArray1< double > >	Range () const
void	SetCenter (const gp_Vec &aCenter)
gp_Vec	Center () const
Standard_OStream &	Print (Standard_OStream &anOStream) const
Public Member Functions inherited from Standard_Transient
	Standard_Transient ()
	Empty constructor.
	Standard_Transient (const Standard_Transient &)
	Copy constructor – does nothing.
Standard_Transient &	operator= (const Standard_Transient &)
	Assignment operator, needed to avoid copying reference counter.
virtual	~Standard_Transient ()=default
	Destructor must be virtual.
virtual const opencascade::handle< Standard_Type > &	DynamicType () const
	Returns a type descriptor about this object.
bool	IsInstance (const opencascade::handle< Standard_Type > &theType) const
	Returns a true value if this is an instance of Type.
bool	IsInstance (const char *const theTypeName) const
	Returns a true value if this is an instance of TypeName.
bool	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.
bool	IsKind (const char *const 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.
Standard_Transient *	This () 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.
int	GetRefCount () const noexcept
	Get the reference counter of this object.
void	IncrementRefCounter () noexcept
	Increments the reference counter of this object. Uses relaxed memory ordering since incrementing only requires atomicity, not synchronization with other memory operations.
int	DecrementRefCounter () noexcept
	Decrements the reference counter of this object; returns the decremented value. Uses release ordering for the decrement to ensure all writes to the object are visible before the count reaches zero. An acquire fence is added only when the count reaches zero, ensuring proper synchronization before deletion. This is more efficient than using acq_rel for every decrement.
virtual void	Delete () const
	Memory deallocator for transient classes.

Additional Inherited Members
typedef void	base_type
	Returns a type descriptor about this object.
static constexpr const char *	get_type_name ()
	Returns a type descriptor about this object.
static const opencascade::handle< Standard_Type > &	get_type_descriptor ()
	Returns type descriptor of Standard_Transient class.

Detailed Description

defines a LOD (level of detailization) node of VRML specifying properties of geometry and its appearance. This group node is used to allow applications to switch between various representations of objects automatically. The children of this node typically represent the same object or objects at the varying of Levels Of Detail (LOD), from highest detail to lowest.

The specified center point of the LOD is transformed by current transformation into world space, and the distance from the transformed center to the world-space eye point is calculated. If thedistance is less than the first value in the ranges array, than the first child of the LOD group is drawn. If between the first and second values in the range array, the second child is drawn, etc. If there are N values in the range array, the LOD group should have N+1 children. Specifying too few children will result in the last child being used repeatedly for the lowest levels of detail; if too many children are specified, the extra children will be ignored. Each value in the ranges array should be greater than the previous value, otherwise results are undefined.

Constructor & Destructor Documentation

Vrml_LOD() [1/2]

Vrml_LOD::Vrml_LOD

(

)

Vrml_LOD() [2/2]

Vrml_LOD::Vrml_LOD	(	const occ::handle< NCollection_HArray1< double > > &	aRange,
		const gp_Vec &	aCenter )

Member Function Documentation

Center()

gp_Vec Vrml_LOD::Center

(

)

const

Print()

Standard_OStream & Vrml_LOD::Print

(

Standard_OStream &

anOStream

)

const

Range()

occ::handle< NCollection_HArray1< double > > Vrml_LOD::Range

(

)

const

SetCenter()

void Vrml_LOD::SetCenter

(

const gp_Vec &

aCenter

)

SetRange()

void Vrml_LOD::SetRange

(

const occ::handle< NCollection_HArray1< double > > &

aRange

)

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

• Vrml_LOD.hxx