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Open CASCADE Technology Reference Manual 8.0.0
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Open CASCADE Technology Reference Manual 8.0.0
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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>
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 | |
| Public Types inherited from Standard_Transient | |
| typedef void | base_type |
| Returns a type descriptor about this object. | |
| Static Public Member Functions inherited from Standard_Transient | |
| 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. | |
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.
| Vrml_LOD::Vrml_LOD | ( | ) |
| Vrml_LOD::Vrml_LOD | ( | const occ::handle< NCollection_HArray1< double > > & | aRange, |
| const gp_Vec & | aCenter ) |
| gp_Vec Vrml_LOD::Center | ( | ) | const |
| Standard_OStream & Vrml_LOD::Print | ( | Standard_OStream & | anOStream | ) | const |
| occ::handle< NCollection_HArray1< double > > Vrml_LOD::Range | ( | ) | const |
| void Vrml_LOD::SetRange | ( | const occ::handle< NCollection_HArray1< double > > & | aRange | ) |
1.10.0