class OSGUTIL_EXPORT osgUtil::CullVisitor

Basic NodeVisitor implementation for rendering a scene.

Inheritance:

Public Methods

CullVisitor()

virtual ~CullVisitor()

virtual CullVisitor* cloneType() const

virtual void reset()

virtual void apply(osg::Node&)

virtual void apply(osg::Geode& node)

virtual void apply(osg::Billboard& node)

virtual void apply(osg::LightSource& node)

virtual void apply(osg::ClipNode& node)

virtual void apply(osg::Group& node)

virtual void apply(osg::Transform& node)

virtual void apply(osg::Projection& node)

virtual void apply(osg::Switch& node)

virtual void apply(osg::LOD& node)

virtual void apply(osg::EarthSky& node)

virtual void apply(osg::OccluderNode& node)

virtual void apply(osg::Impostor& node)

void setEarthSky(const osg::EarthSky* earthSky)

const osg::EarthSky* getEarthSky() const

void setImpostorsActive(const bool active)

Switch the creation of Impostors on or off.

const bool getImpostorsActive() const

Get whether impostors are active or not.

void setImpostorPixelErrorThreshold(const float numPixels)

Set the impostor error threshold.

const float getImpostorPixelErrorThreshold() const

Get the impostor error threshold

void setDepthSortImpostorSprites(const bool doDepthSort)

Set whether ImpsotorSprite's should be placed in a depth sorted bin for rendering

const bool setDepthSortImpostorSprites() const

Get whether ImpsotorSprite's are depth sorted bin for rendering

void setNumberOfFrameToKeepImpostorSprites(const int numFrames)

Set the number of frames that an ImpsotorSprite's is kept whilst not being beyond, before being recycled

const int getNumberOfFrameToKeepImpostorSprites() const

Get the number of frames that an ImpsotorSprite's is kept whilst not being beyond, before being recycled

void setComputeNearFarMode(ComputeNearFarMode cnfm)

ComputeNearFarMode getComputeNearFarMode() const

void setTransparencySortMode(TransparencySortMode tsm)

inline void pushStateSet(const osg::StateSet* ss)

Push state set on the current state group.

inline void popStateSet()

Pop the top state set and hence associated state group.

inline void setRenderGraph(RenderGraph* rg)

inline RenderGraph* getRootRenderGraph()

inline RenderGraph* getCurrentRenderGraph()

inline void setRenderStage(RenderStage* rg)

inline RenderStage* getRenderStage()

inline RenderBin* getCurrentRenderBin()

inline void setCurrentRenderBin(RenderBin* rb)

inline const float getCalculatedNearPlane() const

inline const float getCalculatedFarPlane() const

void updateCalculatedNearFar(const osg::Matrix& matrix, const osg::Drawable& drawable)

void updateCalculatedNearFar(const osg::Matrix& matrix, const osg::BoundingBox& bb)

void updateCalculatedNearFar(const osg::Vec3& pos)

void popProjectionMatrix()

reimplement CullStack's popProjectionMatrix() adding clamping of the projection matrix to the computed near and far

void setState(osg::State* state)

osg::State* getState()

const osg::State* getState() const

inline void addDrawable(osg::Drawable* drawable, osg::Matrix* matrix)

Add a drawable to current render graph

inline void addDrawableAndDepth(osg::Drawable* drawable, osg::Matrix* matrix, const float depth)

Add a drawable and depth to current render graphAdd a drawable and depth to current render graph

inline void addPositionedAttribute(osg::Matrix* matrix, const osg::StateAttribute* attr)

Add an attribute which is positioned related to the modelview matrixAdd an attribute which is positioned related to the modelview matrix

inline RenderLeaf* createOrReuseRenderLeaf(osg::Drawable* drawable, osg::Matrix* projection, osg::Matrix* matrix, float depth)

Public Members

enum ComputeNearFarMode

enum TransparencySortMode

Protected Fields

osg::ref_ptr<RenderGraph> _rootRenderGraph

RenderGraph* _currentRenderGraph

osg::ref_ptr<RenderStage> _rootRenderStage

RenderBin* _currentRenderBin

ComputeNearFarMode _computeNearFar

float _computed_znear

float _computed_zfar

osg::ref_ptr<const osg::EarthSky> _earthSky

TransparencySortMode _tsm

bool _impostorActive

bool _depthSortImpostorSprites

float _impostorPixelErrorThreshold

int _numFramesToKeepImpostorSprites

unsigned int _currentReuseRenderLeafIndex

osg::ref_ptr<osg::ImpostorSpriteManager> _impostorSpriteManager

osg::ref_ptr<osg::State> _state

Protected Methods

CullVisitor(const CullVisitor&)

prevent unwanted copy construction

CullVisitor& operator = (const CullVisitor&)

prevent unwanted copy operator

inline void handle_cull_callbacks_and_traverse(osg::Node& node)

inline void handle_cull_callbacks_and_accept(osg::Node& node, osg::Node* acceptNode)

osg::ImpostorSprite* createImpostorSprite(osg::Impostor& node)

create an impostor sprite by setting up a pre-rendering stage to generate the impostor texture.

Protected Members

typedef std::vector< osg::ref_ptr<RenderLeaf> > RenderLeafList RenderLeafList _reuseRenderLeafList

Documentation

Basic NodeVisitor implementation for rendering a scene. This visitor traverses the scene graph, collecting transparent and opaque osg::Drawables into a depth sorted transparent bin and a state sorted opaque bin. The opaque bin is rendered first, and then the transparent bin in rendered in order from the furthest osg::Drawable from the eye to the one nearest the eye.

CullVisitor()

virtual ~CullVisitor()

virtual CullVisitor* cloneType() const

virtual void reset()

virtual void apply(osg::Node&)

virtual void apply(osg::Geode& node)

virtual void apply(osg::Billboard& node)

virtual void apply(osg::LightSource& node)

virtual void apply(osg::ClipNode& node)

virtual void apply(osg::Group& node)

virtual void apply(osg::Transform& node)

virtual void apply(osg::Projection& node)

virtual void apply(osg::Switch& node)

virtual void apply(osg::LOD& node)

virtual void apply(osg::EarthSky& node)

virtual void apply(osg::OccluderNode& node)

virtual void apply(osg::Impostor& node)

void setEarthSky(const osg::EarthSky* earthSky)

const osg::EarthSky* getEarthSky() const

void setImpostorsActive(const bool active)

Switch the creation of Impostors on or off. Setting active to false forces the CullVisitor to use the Impostor LOD children for rendering. Setting active to true forces the CullVisitor to create the appropriate pre-rendering stages which render to the ImpostorSprite's texture.

const bool getImpostorsActive() const

Get whether impostors are active or not.

void setImpostorPixelErrorThreshold(const float numPixels)

Set the impostor error threshold. Used in calculation of whether impostors remain valid.

const float getImpostorPixelErrorThreshold() const

Get the impostor error threshold

void setDepthSortImpostorSprites(const bool doDepthSort)

Set whether ImpsotorSprite's should be placed in a depth sorted bin for rendering

const bool setDepthSortImpostorSprites() const

Get whether ImpsotorSprite's are depth sorted bin for rendering

void setNumberOfFrameToKeepImpostorSprites(const int numFrames)

Set the number of frames that an ImpsotorSprite's is kept whilst not being beyond, before being recycled

const int getNumberOfFrameToKeepImpostorSprites() const

Get the number of frames that an ImpsotorSprite's is kept whilst not being beyond, before being recycled

enum ComputeNearFarMode

DO_NOT_COMPUTE_NEAR_FAR

COMPUTE_NEAR_FAR_USING_BOUNDING_VOLUMES

COMPUTE_NEAR_FAR_USING_PRIMITIVES

void setComputeNearFarMode(ComputeNearFarMode cnfm)

ComputeNearFarMode getComputeNearFarMode() const

enum TransparencySortMode

LOOK_VECTOR_DISTANCE

OBJECT_EYE_POINT_DISTANCE

void setTransparencySortMode(TransparencySortMode tsm)

inline void pushStateSet(const osg::StateSet* ss)

Push state set on the current state group. If the state exists in a child state group of the current state group then move the current state group to that child. Otherwise, create a new state group for the state set, add it to the current state group then move the current state group pointer to the new state group.

inline void popStateSet()

Pop the top state set and hence associated state group. Move the current state group to the parent of the popped state group.

inline void setRenderGraph(RenderGraph* rg)

inline RenderGraph* getRootRenderGraph()

inline RenderGraph* getCurrentRenderGraph()

inline void setRenderStage(RenderStage* rg)

inline RenderStage* getRenderStage()

inline RenderBin* getCurrentRenderBin()

inline void setCurrentRenderBin(RenderBin* rb)

inline const float getCalculatedNearPlane() const

inline const float getCalculatedFarPlane() const

void updateCalculatedNearFar(const osg::Matrix& matrix, const osg::Drawable& drawable)

void updateCalculatedNearFar(const osg::Matrix& matrix, const osg::BoundingBox& bb)

void updateCalculatedNearFar(const osg::Vec3& pos)

void popProjectionMatrix()

reimplement CullStack's popProjectionMatrix() adding clamping of the projection matrix to the computed near and far

void setState(osg::State* state)

osg::State* getState()

const osg::State* getState() const

CullVisitor(const CullVisitor&)

prevent unwanted copy construction

CullVisitor& operator = (const CullVisitor&)

prevent unwanted copy operator

inline void handle_cull_callbacks_and_traverse(osg::Node& node)

inline void handle_cull_callbacks_and_accept(osg::Node& node, osg::Node* acceptNode)

osg::ImpostorSprite* createImpostorSprite(osg::Impostor& node)

create an impostor sprite by setting up a pre-rendering stage to generate the impostor texture.

osg::ref_ptr<RenderGraph> _rootRenderGraph

RenderGraph* _currentRenderGraph

osg::ref_ptr<RenderStage> _rootRenderStage

RenderBin* _currentRenderBin

ComputeNearFarMode _computeNearFar

float _computed_znear

float _computed_zfar

osg::ref_ptr<const osg::EarthSky> _earthSky

TransparencySortMode _tsm

bool _impostorActive

bool _depthSortImpostorSprites

float _impostorPixelErrorThreshold

int _numFramesToKeepImpostorSprites

typedef std::vector< osg::ref_ptr<RenderLeaf> > RenderLeafList RenderLeafList _reuseRenderLeafList

unsigned int _currentReuseRenderLeafIndex

osg::ref_ptr<osg::ImpostorSpriteManager> _impostorSpriteManager

osg::ref_ptr<osg::State> _state

inline void addDrawable(osg::Drawable* drawable, osg::Matrix* matrix)

Add a drawable to current render graph

inline void addDrawableAndDepth(osg::Drawable* drawable, osg::Matrix* matrix, const float depth)

Add a drawable and depth to current render graphAdd a drawable and depth to current render graph

inline void addPositionedAttribute(osg::Matrix* matrix, const osg::StateAttribute* attr)

Add an attribute which is positioned related to the modelview matrixAdd an attribute which is positioned related to the modelview matrix

inline RenderLeaf* createOrReuseRenderLeaf(osg::Drawable* drawable, osg::Matrix* projection, osg::Matrix* matrix, float depth)

This class has no child classes.

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