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< TITLE > class SG_EXPORT osg::LOD< / TITLE >
< META NAME = "GENERATOR" CONTENT = "DOC++ 3.4.8" >
< / HEAD >
< BODY BGCOLOR = "#ffffff" >
< H2 > class SG_EXPORT < A HREF = "#DOC.DOCU" > osg::LOD< / A > < / H2 > < / H2 > < BLOCKQUOTE > LOD - Level Of Detail group node which allows switching between children depending on distance from eye point.< / BLOCKQUOTE >
< HR >
< H2 > Inheritance:< / H2 >
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< APPLET CODE = "ClassGraph.class" WIDTH = 600 HEIGHT = 125 >
< param name = classes value = "MNode,M,CGroup,MGroup.html,CLOD,MLOD.html,CImpostor,MImpostor.html" >
< param name = before value = "M,M,M,M^_" >
< param name = after value = "Md_SP,Md_,M,M" >
< param name = indent value = "0,1,2,2" >
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< param name = arrowdir value = "down" >
< / APPLET >
< HR >
< DL >
< P > < DL >
< DT > < H3 > Public Methods< / H3 > < DD > < DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > < B > < A HREF = "#DOC.2.55.1" > LOD< / A > < / B > ()
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< DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > < B > < A HREF = "#DOC.2.55.2" > LOD< / A > < / B > (const <!1> < A HREF = "LOD.html#DOC.2.55.2" > LOD< / A > & , const <!1> < A HREF = "CopyOp.html" > CopyOp< / A > & copyop=CopyOp::SHALLOW_COPY)
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< DD > < I > Copy constructor using CopyOp to manage deep vs shallow copy< / I >
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< DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > < B > < A HREF = "#DOC.2.55.3" > META_Node< / A > < / B > (<!1> < A HREF = "LOD.html" > LOD< / A > )
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< DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > virtual void < B > < A HREF = "#DOC.2.55.4" > traverse< / A > < / B > (<!1> < A HREF = "NodeVisitor.html" > NodeVisitor< / A > & nv)
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< DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > void < B > < A HREF = "#DOC.2.55.5" > setRange< / A > < / B > (const unsigned int index, const float range)
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< DD > < I > Sets the value of range list element index to range which is a floating point distance specified in world coordinates.< / I >
< DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > inline const float < B > < A HREF = "#DOC.2.55.6" > getRange< / A > < / B > (const unsigned int index) const
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< DD > < I > returns the range for specified index< / I >
< DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > inline const int < B > < A HREF = "#DOC.2.55.7" > getNumRanges< / A > < / B > () const
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< DD > < I > returns the number of ranges currently set< / I >
< DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > inline void < B > < A HREF = "#DOC.2.55.8" > setCenter< / A > < / B > (const <!1> < A HREF = "Vec3.html" > Vec3< / A > & <!1> < A HREF = "BoundingSphere.html#DOC.2.5.8" > center< / A > )
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< DD > < I > Sets the object-space point which defines the center of the osg::LOD.< / I >
< DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > inline const <!1> < A HREF = "Vec3.html" > Vec3< / A > & < B > < A HREF = "#DOC.2.55.9" > getCenter< / A > < / B > () const
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< DD > < I > return the LOD center point.< / I >
< DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > void < B > < A HREF = "#DOC.2.55.11" > setEvaluateLODCallback< / A > < / B > (<!1> < A HREF = "LOD.html#DOC.2.55.10" > EvaluateLODCallback< / A > * cbc)
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< DD > < I > Set the EvaluateLODCallback which allows users to attach customize computation of the the selection of LOD children< / I >
< DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > <!1> < A HREF = "LOD.html#DOC.2.55.10" > EvaluateLODCallback< / A > * < B > < A HREF = "#DOC.2.55.12" > getEvaluateLODCallback< / A > < / B > ()
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< DD > < I > Get the non const ComputeBillboardCallback< / I >
< DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > const <!1> < A HREF = "LOD.html#DOC.2.55.10" > EvaluateLODCallback< / A > * < B > < A HREF = "#DOC.2.55.13" > getEvaluateLODCallback< / A > < / B > () const
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< DD > < I > Get the const ComputeBillboardCallback< / I >
< DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > inline const int < B > < A HREF = "#DOC.2.55.14" > evaluate< / A > < / B > (const <!1> < A HREF = "Vec3.html" > Vec3< / A > & eye_local, const float bias=1.0f) const
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< DD > < I > return the child to traverse.< / I >
< / DL > < / P >
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< P > < DL >
< DT > < H3 > Public Members< / H3 > < DD > < DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > struct < B > < A HREF = "#DOC.2.55.10" > EvaluateLODCallback< / A > < / B > : public <!1> < A HREF = "Referenced.html" > osg::Referenced< / A >
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< DD > < I > Callback attached to an LOD which allows the users to customize the selection of LOD children< / I >
< / DL > < / P >
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< P > < DL >
< DT > < H3 > Protected Fields< / H3 > < DD > < DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > RangeList < B > < A HREF = "#DOC.2.55.18" > _rangeList2< / A > < / B >
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< DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > <!1> < A HREF = "ref_ptr.html" > ref_ptr< / A > < <!1> < A HREF = "LOD.html#DOC.2.55.10" > EvaluateLODCallback< / A > > < B > < A HREF = "#DOC.2.55.19" > _evaluateLODCallback< / A > < / B >
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< DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > <!1> < A HREF = "Vec3.html" > Vec3< / A > < B > < A HREF = "#DOC.2.55.20" > _center< / A > < / B >
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< / DL > < / P >
< P > < DL >
< DT > < H3 > Protected Methods< / H3 > < DD > < DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > virtual < B > < A HREF = "#DOC.2.55.15" > ~LOD< / A > < / B > ()
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< DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > virtual const int < B > < A HREF = "#DOC.2.55.16" > evaluateLODChild< / A > < / B > (const <!1> < A HREF = "Vec3.html" > Vec3< / A > & eye_local, const float bias) const
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< / DL > < / P >
< P > < DL >
< DT > < H3 > Protected Members< / H3 > < DD > < DT >
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< IMG ALT = "[more]" BORDER = 0 SRC = icon1.gif > typedef std::vector< float> RangeList RangeList < B > < A HREF = "#DOC.2.55.17" > _rangeList< / A > < / B >
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< / DL > < / P >
< / DL >
< HR > < H3 > Inherited from < A HREF = "Group.html" > Group< / A > :< / H3 >
< DL >
< P > < DL >
< DT > < H3 > Public Methods< / H3 > < DD > < DT >
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< IMG ALT = "o" SRC = icon2.gif > virtual bool < B > addChild< / B > ( Node* child )
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< DT >
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< IMG ALT = "o" SRC = icon2.gif > virtual bool < B > removeChild< / B > ( Node* child )
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< DT >
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< IMG ALT = "o" SRC = icon2.gif > virtual bool < B > replaceChild< / B > ( Node* origChild, Node* newChild )
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< DT >
< IMG ALT = "o" SRC = icon2.gif > inline const int < B > getNumChildren< / B > () const
< DT >
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< IMG ALT = "o" SRC = icon2.gif > inline Node* < B > getChild< / B > ( const int i )
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< DT >
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< IMG ALT = "o" SRC = icon2.gif > inline const Node* < B > getChild< / B > ( const int i ) const
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< DT >
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< IMG ALT = "o" SRC = icon2.gif > inline bool < B > containsNode< / B > ( const Node* node ) const
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< DT >
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< IMG ALT = "o" SRC = icon2.gif > inline ChildList::iterator < B > findNode< / B > ( const Node* node )
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< DT >
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< IMG ALT = "o" SRC = icon2.gif > inline ChildList::const_iterator < B > findNode< / B > ( const Node* node ) const
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< / DL > < / P >
< P > < DL >
< DT > < H3 > Protected Fields< / H3 > < DD > < DT >
< IMG ALT = "o" SRC = icon2.gif > ChildList < B > _children< / B >
< / DL > < / P >
< P > < DL >
< DT > < H3 > Protected Methods< / H3 > < DD > < DT >
< IMG ALT = "o" SRC = icon2.gif > virtual const bool < B > computeBound< / B > () const
< / DL > < / P >
< / DL >
< A NAME = "DOC.DOCU" > < / A >
< HR >
< H2 > Documentation< / H2 >
< BLOCKQUOTE > 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
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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]< dist < range [ i + 1 ] is true . This requires there to be n + 1 range values where the number of
children is n, since no maximum distance of infinity is assumed. If the number of range values (m)
is insufficient then the children m through to n will be ignored, only 0..m-1 will be used
during rendering.< / BLOCKQUOTE >
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< DL >
< A NAME = "LOD" > < / A >
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< A NAME = "DOC.2.55.1" > < / A >
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< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > LOD()< / B > < / TT >
< DL > < DT > < DD > < / DL > < P >
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< A NAME = "LOD" > < / A >
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< A NAME = "DOC.2.55.2" > < / A >
< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > LOD(const <!1> < A HREF = "LOD.html#DOC.2.55.2" > LOD< / A > & , const <!1> < A HREF = "CopyOp.html" > CopyOp< / A > & copyop=CopyOp::SHALLOW_COPY)< / B > < / TT >
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< DD > Copy constructor using CopyOp to manage deep vs shallow copy
< DL > < DT > < DD > < / DL > < P >
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< A NAME = "META_Node" > < / A >
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< A NAME = "DOC.2.55.3" > < / A >
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< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > META_Node(<!1> < A HREF = "LOD.html" > LOD< / A > )< / B > < / TT >
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< DL > < DT > < DD > < / DL > < P >
< A NAME = "traverse" > < / A >
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< A NAME = "DOC.2.55.4" > < / A >
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< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > virtual void traverse(<!1> < A HREF = "NodeVisitor.html" > NodeVisitor< / A > & nv)< / B > < / TT >
< DL > < DT > < DD > < / DL > < P >
< A NAME = "setRange" > < / A >
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< A NAME = "DOC.2.55.5" > < / A >
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< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > void setRange(const unsigned int index, const float range)< / B > < / TT >
< DD > Sets the value of range list element index to range which
is a floating point distance specified in world coordinates.
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Range list automatically expands to accommodate values beyond
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the current getNumRanges().
< DL > < DT > < DD > < / DL > < P >
< A NAME = "getRange" > < / A >
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< A NAME = "DOC.2.55.6" > < / A >
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< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > inline const float getRange(const unsigned int index) const < / B > < / TT >
< DD > returns the range for specified index
< DL > < DT > < DD > < / DL > < P >
< A NAME = "getNumRanges" > < / A >
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< A NAME = "DOC.2.55.7" > < / A >
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< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > inline const int getNumRanges() const < / B > < / TT >
< DD > returns the number of ranges currently set
< DL > < DT > < DD > < / DL > < P >
< A NAME = "setCenter" > < / A >
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< A NAME = "DOC.2.55.8" > < / A >
< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > inline void setCenter(const <!1> < A HREF = "Vec3.html" > Vec3< / A > & <!1> < A HREF = "BoundingSphere.html#DOC.2.5.8" > center< / A > )< / B > < / TT >
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< DD > 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.
< DL > < DT > < DD > < / DL > < P >
< A NAME = "getCenter" > < / A >
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< A NAME = "DOC.2.55.9" > < / A >
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< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > inline const <!1> < A HREF = "Vec3.html" > Vec3< / A > & getCenter() const < / B > < / TT >
< DD > return the LOD center point.
< DL > < DT > < DD > < / DL > < P >
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< A NAME = "EvaluateLODCallback" > < / A >
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< A NAME = "DOC.2.55.10" > < / A >
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< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > struct EvaluateLODCallback: public <!1> < A HREF = "Referenced.html" > osg::Referenced< / A > < / B > < / TT >
< DD > Callback attached to an LOD which allows the users to customize the selection of LOD children
< DL > < DT > < DD > < / DL > < P > < DL >
< A NAME = "evaluateLODChild" > < / A >
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< A NAME = "DOC.2.55.10.1" > < / A >
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< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > virtual const int evaluateLODChild(const <!1> < A HREF = "LOD.html" > osg::LOD< / A > * lod, const <!1> < A HREF = "Vec3.html" > Vec3< / A > & eye_local, const float bias) const < / B > < / TT >
< DD > Compute the child to select
< DL > < DT > < DD > < / DL > < P > < / DL >
< A NAME = "setEvaluateLODCallback" > < / A >
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< A NAME = "DOC.2.55.11" > < / A >
< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > void setEvaluateLODCallback(<!1> < A HREF = "LOD.html#DOC.2.55.10" > EvaluateLODCallback< / A > * cbc)< / B > < / TT >
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< DD > Set the EvaluateLODCallback which allows users to attach customize computation of the the selection of LOD children
< DL > < DT > < DD > < / DL > < P >
< A NAME = "getEvaluateLODCallback" > < / A >
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< A NAME = "DOC.2.55.12" > < / A >
< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > <!1> < A HREF = "LOD.html#DOC.2.55.10" > EvaluateLODCallback< / A > * getEvaluateLODCallback()< / B > < / TT >
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< DD > Get the non const ComputeBillboardCallback
< DL > < DT > < DD > < / DL > < P >
< A NAME = "getEvaluateLODCallback" > < / A >
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< A NAME = "DOC.2.55.13" > < / A >
< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > const <!1> < A HREF = "LOD.html#DOC.2.55.10" > EvaluateLODCallback< / A > * getEvaluateLODCallback() const < / B > < / TT >
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< DD > Get the const ComputeBillboardCallback
< DL > < DT > < DD > < / DL > < P >
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< A NAME = "evaluate" > < / A >
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< A NAME = "DOC.2.55.14" > < / A >
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< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > inline const int evaluate(const <!1> < A HREF = "Vec3.html" > Vec3< / A > & eye_local, const float bias=1.0f) const < / B > < / TT >
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< DD > return the child to traverse.
Selected by the distance between the eye point in local
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coordinates and the LOD center, multiplied by the bias.
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< DL > < DT > < DD > < / DL > < P >
< A NAME = "~LOD" > < / A >
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< A NAME = "DOC.2.55.15" > < / A >
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< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > virtual ~LOD()< / B > < / TT >
< DL > < DT > < DD > < / DL > < P >
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< A NAME = "evaluateLODChild" > < / A >
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< A NAME = "DOC.2.55.16" > < / A >
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< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > virtual const int evaluateLODChild(const <!1> < A HREF = "Vec3.html" > Vec3< / A > & eye_local, const float bias) const < / B > < / TT >
< DL > < DT > < DD > < / DL > < P >
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< A NAME = "_rangeList" > < / A >
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< A NAME = "DOC.2.55.17" > < / A >
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< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > typedef std::vector< float> RangeList RangeList _rangeList< / B > < / TT >
< DL > < DT > < DD > < / DL > < P >
< A NAME = "_rangeList2" > < / A >
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< A NAME = "DOC.2.55.18" > < / A >
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< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > RangeList _rangeList2< / B > < / TT >
< DL > < DT > < DD > < / DL > < P >
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< A NAME = "_evaluateLODCallback" > < / A >
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< A NAME = "DOC.2.55.19" > < / A >
< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > <!1> < A HREF = "ref_ptr.html" > ref_ptr< / A > < <!1> < A HREF = "LOD.html#DOC.2.55.10" > EvaluateLODCallback< / A > > _evaluateLODCallback< / B > < / TT >
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< DL > < DT > < DD > < / DL > < P >
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< A NAME = "_center" > < / A >
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< A NAME = "DOC.2.55.20" > < / A >
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< DT > < IMG ALT = "o" BORDER = 0 SRC = icon2.gif > < TT > < B > <!1> < A HREF = "Vec3.html" > Vec3< / A > _center< / B > < / TT >
< DL > < DT > < DD > < / DL > < P > < / DL >
< HR >
< DL > < DT > < B > Direct child classes:
< / B > < DD > < A HREF = "Impostor.html" > Impostor< / A > < BR >
< / DL >
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< DL > < DT > < DT > < B > Friends:< / B > < DD > struct <!1> < A HREF = "LOD.html#DOC.2.55.10" > osg::LOD::EvaluateLODCallback< / A > < BR > < DD > < / DL > < P > < P > < I > < A HREF = "index.html" > Alphabetic index< / A > < / I > < I > < A HREF = "HIER.html" > HTML hierarchy of classes< / A > or < A HREF = "HIERjava.html" > Java< / A > < / I > < / P > < HR >
2001-09-20 05:19:47 +08:00
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