class SG_EXPORT osg::LOD

LOD - Level Of Detail group node which allows switching between children depending on distance from eye point.

Inheritance:

Public Methods

LOD()

LOD(const LOD&, const CopyOp& copyop=CopyOp::SHALLOW_COPY)

Copy constructor using CopyOp to manage deep vs shallow copy

META_Node(LOD)

virtual void traverse(NodeVisitor& nv)

void setRange(const unsigned int index, const float range)

Sets the value of range list element index to range which is a floating point distance specified in world coordinates.

inline const float getRange(const unsigned int index) const

returns the range for specified index

inline const int getNumRanges() const

returns the number of ranges currently set

inline void setCenter(const Vec3 &center)

Sets the object-space point which defines the center of the osg::LOD.

inline const Vec3& getCenter() const

return the LOD center point.

void setEvaluateLODCallback(EvaluateLODCallback* cbc)

Set the EvaluateLODCallback which allows users to attach customize computation of the the selection of LOD children

EvaluateLODCallback* getEvaluateLODCallback()

Get the non const ComputeBillboardCallback

const EvaluateLODCallback* getEvaluateLODCallback() const

Get the const ComputeBillboardCallback

inline const int evaluate(const Vec3& eye_local, const float bias=1.0f) const

return the child to traverse.

Public Members

struct EvaluateLODCallback: public osg::Referenced

Callback attached to an LOD which allows the users to customize the selection of LOD children

Protected Fields

RangeList _rangeList2

ref_ptr<EvaluateLODCallback> _evaluateLODCallback

Vec3 _center

Protected Methods

virtual ~LOD()

virtual const int evaluateLODChild(const Vec3& eye_local, const float bias) const

Protected Members

typedef std::vector<float> RangeList RangeList _rangeList

Inherited from Group:

Public Methods

virtual bool addChild( Node* child )

virtual bool removeChild( Node* child )

virtual bool replaceChild( Node* origChild, Node* newChild )

inline const int getNumChildren() const

inline Node* getChild( const int i )

inline const Node* getChild( const int i ) const

inline bool containsNode( const Node* node ) const

inline ChildList::iterator findNode( const Node* node )

inline ChildList::const_iterator findNode( const Node* node ) const

Protected Fields

ChildList _children

Protected Methods

virtual const bool computeBound() const

Inherited from Node:

Public Methods

virtual Object* cloneType() const

virtual Object* clone(const CopyOp& copyop) const

virtual bool isSameKindAs(const Object* obj) const

virtual const char* className() const

virtual void accept(NodeVisitor& nv)

virtual void ascend(NodeVisitor& nv)

inline void setName( const std::string& name )

inline void setName( const char* name )

inline const std::string& getName() const

inline const ParentList& getParents() const

inline ParentList getParents()

inline Group* getParent(const int i)

inline const Group* getParent(const int i) const

inline const int getNumParents() const

void setAppCallback(NodeCallback* nc)

inline NodeCallback* getAppCallback()

inline const NodeCallback* getAppCallback() const

inline const int getNumChildrenRequiringAppTraversal() const

void setCullingActive(const bool active)

inline const bool getCullingActive() const

inline const int getNumChildrenWithCullingDisabled() const

inline void setUserData(osg::Referenced* obj)

inline Referenced* getUserData()

inline const Referenced* getUserData() const

inline void setNodeMask(const NodeMask nm)

inline const NodeMask getNodeMask() const

inline const DescriptionList& getDescriptions() const

inline DescriptionList& getDescriptions()

inline const std::string& getDescription(const int i) const

inline std::string& getDescription(const int i)

inline const int getNumDescriptions() const

void addDescription(const std::string& desc)

inline void setStateSet(osg::StateSet* dstate)

inline osg::StateSet* getStateSet()

inline const osg::StateSet* getStateSet() const

inline const BoundingSphere& getBound() const

void dirtyBound()

Public Members

typedef std::vector<Group*> ParentList

typedef std::vector<std::string> DescriptionList

Protected Fields

mutable BoundingSphere _bsphere

mutable bool _bsphere_computed

std::string _name

ParentList _parents

ref_ptr<NodeCallback> _appCallback

int _numChildrenRequiringAppTraversal

bool _cullingActive

int _numChildrenWithCullingDisabled

osg::ref_ptr<Referenced> _userData

NodeMask _nodeMask

DescriptionList _descriptions

ref_ptr<StateSet> _dstate

Protected Methods

void addParent(osg::Group* node)

void removeParent(osg::Group* node)

void setNumChildrenRequiringAppTraversal(const int num)

void setNumChildrenWithCullingDisabled(const int num)

Inherited from Object:

Inherited from Referenced:

Public Methods

inline Referenced& operator = (Referenced&)

inline void ref() const

inline void unref() const

inline const int referenceCount() const

Protected Fields

mutable int _refCount

Documentation

LOD - Level Of Detail group node which allows switching between children depending on distance from eye point. Typical uses are for load balancing - objects further away from the eye point are rendered at a lower level of detail, and at times of high stress on the graphics pipeline lower levels of detail can also be chosen. The children are ordered from most detailed (for close up views) to the least (see from a distance), and a set of ranges are used to decide which LOD is used at different view distances, the criteria used is child 'i' is used when range[i]

LOD()

LOD(const LOD&, const CopyOp& copyop=CopyOp::SHALLOW_COPY)

Copy constructor using CopyOp to manage deep vs shallow copy

META_Node(LOD)

virtual void traverse(NodeVisitor& nv)

void setRange(const unsigned int index, const float range)

Sets the value of range list element index to range which is a floating point distance specified in world coordinates. Range list automatically expands to accommodate values beyond the current getNumRanges().

inline const float getRange(const unsigned int index) const

returns the range for specified index

inline const int getNumRanges() const

returns the number of ranges currently set

inline void setCenter(const Vec3 &center)

Sets the object-space point which defines the center of the osg::LOD. center is affected by any transforms in the hierarchy above the osg::LOD.

inline const Vec3& getCenter() const

return the LOD center point.

struct EvaluateLODCallback: public osg::Referenced

Callback attached to an LOD which allows the users to customize the selection of LOD children

virtual const int evaluateLODChild(const osg::LOD* lod, const Vec3& eye_local, const float bias) const

Compute the child to select

void setEvaluateLODCallback(EvaluateLODCallback* cbc)

Set the EvaluateLODCallback which allows users to attach customize computation of the the selection of LOD children

EvaluateLODCallback* getEvaluateLODCallback()

Get the non const ComputeBillboardCallback

const EvaluateLODCallback* getEvaluateLODCallback() const

Get the const ComputeBillboardCallback

inline const int evaluate(const Vec3& eye_local, const float bias=1.0f) const

return the child to traverse. Selected by the distance between the eye point in local coordinates and the LOD center, multiplied by the bias.

virtual ~LOD()

virtual const int evaluateLODChild(const Vec3& eye_local, const float bias) const

typedef std::vector<float> RangeList RangeList _rangeList

RangeList _rangeList2

ref_ptr<EvaluateLODCallback> _evaluateLODCallback

Vec3 _center

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Direct child classes:

Impostor

Friends:

struct osg::LOD::EvaluateLODCallback

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