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(osg, LOD)

virtual void traverse(NodeVisitor& nv)

virtual bool addChild(Node* child)

virtual bool addChild(Node* child, float min, float max)

virtual bool removeChild(Node* child)

void setCenterMode(CenterMode mode)

CenterMode getCenterMode() const

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 setRange(unsigned int childNo, float min, float max)

Sets the min and max visible ranges of range of specifiec child.

inline float getMinRange(unsigned int childNo) const

returns the min visible range for specified child

inline float getMaxRange(unsigned int childNo) const

returns the max visible range for specified child

inline unsigned int getNumRanges() const

returns the number of ranges currently set.

inline RangeList& getRangeList()

return the list of MinMax ranges for each child

inline const RangeList& getRangeList() const

return the list of MinMax ranges for each child

Public Members

typedef std::pair<float,float> MinMaxPair

typedef std::vector<MinMaxPair> RangeList

enum CenterMode

Protected Fields

CenterMode _centerMode

Vec3 _userDefinedCenter

RangeList _rangeList

Protected Methods

virtual ~LOD()

Inherited from Group:

Public Methods

virtual Group* asGroup()

virtual const Group* asGroup() const

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

inline unsigned int getNumChildren() const

inline Node* getChild( unsigned int i )

inline const Node* getChild( unsigned 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

inline unsigned int findChildNo( const Node* node ) const

Public Members

typedef std::vector<ref_ptr<Node> > ChildList

Protected Fields

ChildList _children

Protected Methods

virtual bool computeBound() const

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(osg, LOD)

virtual void traverse(NodeVisitor& nv)

virtual bool addChild(Node* child)

virtual bool addChild(Node* child, float min, float max)

virtual bool removeChild(Node* child)

typedef std::pair<float,float> MinMaxPair

typedef std::vector<MinMaxPair> RangeList

enum CenterMode

USE_BOUNDING_SPHERE_CENTER

USER_DEFINED_CENTER

void setCenterMode(CenterMode mode)

CenterMode getCenterMode() const

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.

void setRange(unsigned int childNo, float min, float max)

Sets the min and max visible ranges of range of specifiec child. Values are floating point distance specified in local objects coordinates.

inline float getMinRange(unsigned int childNo) const

returns the min visible range for specified child

inline float getMaxRange(unsigned int childNo) const

returns the max visible range for specified child

inline unsigned int getNumRanges() const

returns the number of ranges currently set. An LOD which has been fully set up will have getNumChildren()==getNumRanges().

inline RangeList& getRangeList()

return the list of MinMax ranges for each child

inline const RangeList& getRangeList() const

return the list of MinMax ranges for each child

virtual ~LOD()

CenterMode _centerMode

Vec3 _userDefinedCenter

RangeList _rangeList

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Impostor

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