InteresectionVisitor is used to testing for intersections with the scene, traversing the scene using generic osgUtil::Intersector's to test against the scene. More...

Inheritance diagram for osgUtil::IntersectionVisitor:

[legend]

List of all members.

Classes
struct	ReadCallback
	Callback used to implement the reading of external files, allowing support for paged databases to be integrated with IntersectionVisitor. More...
Public Types
enum	LODSelectionMode { USE_HIGHEST_LEVEL_OF_DETAIL, USE_EYE_POINT_FOR_LOD_LEVEL_SELECTION }
Public Member Functions
	IntersectionVisitor (Intersector intersector=0, ReadCallback readCallback=0)
	META_NodeVisitor ("osgUtil","IntersectionVisitor") virtual void reset()
void	setIntersector (Intersector *intersector)
	Set the intersector that will be used to intersect with the scene, and to store any hits that occur.
Intersector *	getIntersector ()
	Get the intersector that will be used to intersect with the scene, and to store any hits that occur.
const Intersector *	getIntersector () const
	Get the const intersector that will be used to intersect with the scene, and to store any hits that occur.
void	setUseKdTreeWhenAvailable (bool useKdTrees)
	Set whether the intersectors should use KdTrees when they are found on the scene graph.
bool	getUseKdTreeWhenAvailable () const
	Set whether the intersectors should use KdTrees.
void	setDoDummyTraversal (bool dummy)
bool	getDoDummyTraversal () const
void	setReadCallback (ReadCallback *rc)
	Set the read callback.
ReadCallback *	getReadCallback ()
	Get the read callback.
const ReadCallback *	getReadCallback () const
	Get the const read callback.
void	pushWindowMatrix (osg::RefMatrix *matrix)
void	pushWindowMatrix (osg::Viewport *viewport)
void	popWindowMatrix ()
osg::RefMatrix *	getWindowMatrix ()
const osg::RefMatrix *	getWindowMatrix () const
void	pushProjectionMatrix (osg::RefMatrix *matrix)
void	popProjectionMatrix ()
osg::RefMatrix *	getProjectionMatrix ()
const osg::RefMatrix *	getProjectionMatrix () const
void	pushViewMatrix (osg::RefMatrix *matrix)
void	popViewMatrix ()
osg::RefMatrix *	getViewMatrix ()
const osg::RefMatrix *	getViewMatrix () const
void	pushModelMatrix (osg::RefMatrix *matrix)
void	popModelMatrix ()
osg::RefMatrix *	getModelMatrix ()
const osg::RefMatrix *	getModelMatrix () const
void	setReferenceEyePoint (const osg::Vec3 &ep)
	Set the reference eye point that is used for nodes that require an eye point to position themselves, such as billboards.
const osg::Vec3 &	getReferenceEyePoint () const
	Get the reference eye point.
void	setReferenceEyePointCoordinateFrame (Intersector::CoordinateFrame cf)
	Set the coordinate frame of the reference eye point.
Intersector::CoordinateFrame	getReferenceEyePointCoordinateFrame () const
	Get the coordinate frame of the reference eye point.
virtual osg::Vec3	getEyePoint () const
	Get the eye point in the local coordinate frame a given traversal point.
void	setLODSelectionMode (LODSelectionMode mode)
	Set the LOD selection scheme.
LODSelectionMode	getLODSelectionMode () const
	Get the LOD selection scheme.
virtual float	getDistanceToEyePoint (const osg::Vec3 &pos, bool withLODScale) const
	Get the distance from a point to the eye point, distance value in local coordinate system.
virtual void	apply (osg::Node &node)
virtual void	apply (osg::Geode &geode)
virtual void	apply (osg::Billboard &geode)
virtual void	apply (osg::Group &group)
virtual void	apply (osg::LOD &lod)
virtual void	apply (osg::PagedLOD &lod)
virtual void	apply (osg::Transform &transform)
virtual void	apply (osg::Projection &projection)
virtual void	apply (osg::Camera &camera)
Protected Types
typedef std::list < osg::ref_ptr< Intersector > >	IntersectorStack
typedef std::list < osg::ref_ptr< osg::RefMatrix > >	MatrixStack
Protected Member Functions
bool	enter (const osg::Node &node)
void	leave ()
void	intersect (osg::Drawable *drawable)
void	push_clone ()
void	pop_clone ()
Protected Attributes
IntersectorStack	_intersectorStack
bool	_useKdTreesWhenAvailable
bool	_dummyTraversal
osg::ref_ptr< ReadCallback >	_readCallback
MatrixStack	_windowStack
MatrixStack	_projectionStack
MatrixStack	_viewStack
MatrixStack	_modelStack
osg::Vec3	_referenceEyePoint
Intersector::CoordinateFrame	_referenceEyePointCoordinateFrame
LODSelectionMode	_lodSelectionMode
bool	_eyePointDirty
osg::Vec3	_eyePoint

Detailed Description

InteresectionVisitor is used to testing for intersections with the scene, traversing the scene using generic osgUtil::Intersector's to test against the scene.

To implement different types of intersection techniques, one implements custom versions of the osgUtil::Intersector, and then pass the constructed intersector to the IntersectionVisitor.

Member Typedef Documentation

typedef std::list< osg::ref_ptr<Intersector> > osgUtil::IntersectionVisitor::IntersectorStack [protected]

typedef std::list< osg::ref_ptr<osg::RefMatrix> > osgUtil::IntersectionVisitor::MatrixStack [protected]

Member Enumeration Documentation

enum osgUtil::IntersectionVisitor::LODSelectionMode

Enumerator:

USE_HIGHEST_LEVEL_OF_DETAIL
USE_EYE_POINT_FOR_LOD_LEVEL_SELECTION

Constructor & Destructor Documentation

osgUtil::IntersectionVisitor::IntersectionVisitor	(	Intersector *	intersector = `0`,
		ReadCallback *	readCallback = `0`
	)

Member Function Documentation

virtual void osgUtil::IntersectionVisitor::apply ( osg::Node & node ) [virtual]

Reimplemented from osg::NodeVisitor.

virtual void osgUtil::IntersectionVisitor::apply ( osg::Geode & geode ) [virtual]

Reimplemented from osg::NodeVisitor.

virtual void osgUtil::IntersectionVisitor::apply ( osg::Billboard & geode ) [virtual]

Reimplemented from osg::NodeVisitor.

virtual void osgUtil::IntersectionVisitor::apply ( osg::Group & group ) [virtual]

Reimplemented from osg::NodeVisitor.

virtual void osgUtil::IntersectionVisitor::apply ( osg::LOD & lod ) [virtual]

Reimplemented from osg::NodeVisitor.

virtual void osgUtil::IntersectionVisitor::apply ( osg::PagedLOD & lod ) [virtual]

Reimplemented from osg::NodeVisitor.

virtual void osgUtil::IntersectionVisitor::apply ( osg::Transform & transform ) [virtual]

Reimplemented from osg::NodeVisitor.

virtual void osgUtil::IntersectionVisitor::apply ( osg::Projection & projection ) [virtual]

Reimplemented from osg::NodeVisitor.

virtual void osgUtil::IntersectionVisitor::apply ( osg::Camera & camera ) [virtual]

Reimplemented from osg::NodeVisitor.

bool osgUtil::IntersectionVisitor::enter ( const osg::Node & node ) [inline, protected]

virtual float osgUtil::IntersectionVisitor::getDistanceToEyePoint	(	const osg::Vec3 &	pos,
		bool	withLODScale
	)		const `[virtual]`

Get the distance from a point to the eye point, distance value in local coordinate system.

This is calculated using the pseudo-EyePoint (above) when doing LOD calculcations.

Reimplemented from osg::NodeVisitor.

bool osgUtil::IntersectionVisitor::getDoDummyTraversal ( ) const [inline]

virtual osg::Vec3 osgUtil::IntersectionVisitor::getEyePoint ( ) const [virtual]

Get the eye point in the local coordinate frame a given traversal point.

Reimplemented from osg::NodeVisitor.

Intersector* osgUtil::IntersectionVisitor::getIntersector ( ) [inline]

Get the intersector that will be used to intersect with the scene, and to store any hits that occur.

const Intersector* osgUtil::IntersectionVisitor::getIntersector ( ) const [inline]

Get the const intersector that will be used to intersect with the scene, and to store any hits that occur.

LODSelectionMode osgUtil::IntersectionVisitor::getLODSelectionMode ( ) const [inline]

Get the LOD selection scheme.

osg::RefMatrix* osgUtil::IntersectionVisitor::getModelMatrix ( ) [inline]

const osg::RefMatrix* osgUtil::IntersectionVisitor::getModelMatrix ( ) const [inline]

osg::RefMatrix* osgUtil::IntersectionVisitor::getProjectionMatrix ( ) [inline]

const osg::RefMatrix* osgUtil::IntersectionVisitor::getProjectionMatrix ( ) const [inline]

ReadCallback* osgUtil::IntersectionVisitor::getReadCallback ( ) [inline]

Get the read callback.

const ReadCallback* osgUtil::IntersectionVisitor::getReadCallback ( ) const [inline]

Get the const read callback.

const osg::Vec3& osgUtil::IntersectionVisitor::getReferenceEyePoint ( ) const [inline]

Get the reference eye point.

Intersector::CoordinateFrame osgUtil::IntersectionVisitor::getReferenceEyePointCoordinateFrame ( ) const [inline]

Get the coordinate frame of the reference eye point.

bool osgUtil::IntersectionVisitor::getUseKdTreeWhenAvailable ( ) const [inline]

Set whether the intersectors should use KdTrees.

osg::RefMatrix* osgUtil::IntersectionVisitor::getViewMatrix ( ) [inline]

const osg::RefMatrix* osgUtil::IntersectionVisitor::getViewMatrix ( ) const [inline]

osg::RefMatrix* osgUtil::IntersectionVisitor::getWindowMatrix ( ) [inline]

const osg::RefMatrix* osgUtil::IntersectionVisitor::getWindowMatrix ( ) const [inline]

void osgUtil::IntersectionVisitor::intersect ( osg::Drawable * drawable ) [inline, protected]

void osgUtil::IntersectionVisitor::leave ( ) [inline, protected]

osgUtil::IntersectionVisitor::META_NodeVisitor	(	"osgUtil"	,
		"IntersectionVisitor"
	)

void osgUtil::IntersectionVisitor::pop_clone ( ) [inline, protected]

void osgUtil::IntersectionVisitor::popModelMatrix ( ) [inline]

void osgUtil::IntersectionVisitor::popProjectionMatrix ( ) [inline]

void osgUtil::IntersectionVisitor::popViewMatrix ( ) [inline]

void osgUtil::IntersectionVisitor::popWindowMatrix ( ) [inline]

void osgUtil::IntersectionVisitor::push_clone ( ) [inline, protected]

void osgUtil::IntersectionVisitor::pushModelMatrix ( osg::RefMatrix * matrix ) [inline]

void osgUtil::IntersectionVisitor::pushProjectionMatrix ( osg::RefMatrix * matrix ) [inline]

void osgUtil::IntersectionVisitor::pushViewMatrix ( osg::RefMatrix * matrix ) [inline]

void osgUtil::IntersectionVisitor::pushWindowMatrix ( osg::RefMatrix * matrix ) [inline]

void osgUtil::IntersectionVisitor::pushWindowMatrix ( osg::Viewport * viewport ) [inline]

References osg::Viewport::computeWindowMatrix().

void osgUtil::IntersectionVisitor::setDoDummyTraversal ( bool dummy ) [inline]

void osgUtil::IntersectionVisitor::setIntersector ( Intersector * intersector )

Set the intersector that will be used to intersect with the scene, and to store any hits that occur.

void osgUtil::IntersectionVisitor::setLODSelectionMode ( LODSelectionMode mode ) [inline]

Set the LOD selection scheme.

void osgUtil::IntersectionVisitor::setReadCallback ( ReadCallback * rc ) [inline]

Set the read callback.

void osgUtil::IntersectionVisitor::setReferenceEyePoint ( const osg::Vec3 & ep ) [inline]

Set the reference eye point that is used for nodes that require an eye point to position themselves, such as billboards.

void osgUtil::IntersectionVisitor::setReferenceEyePointCoordinateFrame ( Intersector::CoordinateFrame cf ) [inline]

Set the coordinate frame of the reference eye point.

void osgUtil::IntersectionVisitor::setUseKdTreeWhenAvailable ( bool useKdTrees ) [inline]

Set whether the intersectors should use KdTrees when they are found on the scene graph.

Member Data Documentation

bool osgUtil::IntersectionVisitor::_dummyTraversal [protected]

osg::Vec3 osgUtil::IntersectionVisitor::_eyePoint [mutable, protected]

bool osgUtil::IntersectionVisitor::_eyePointDirty [mutable, protected]

IntersectorStack osgUtil::IntersectionVisitor::_intersectorStack [protected]

LODSelectionMode osgUtil::IntersectionVisitor::_lodSelectionMode [protected]

MatrixStack osgUtil::IntersectionVisitor::_modelStack [protected]

MatrixStack osgUtil::IntersectionVisitor::_projectionStack [protected]

osg::ref_ptr<ReadCallback> osgUtil::IntersectionVisitor::_readCallback [protected]

osg::Vec3 osgUtil::IntersectionVisitor::_referenceEyePoint [protected]

Intersector::CoordinateFrame osgUtil::IntersectionVisitor::_referenceEyePointCoordinateFrame [protected]

bool osgUtil::IntersectionVisitor::_useKdTreesWhenAvailable [protected]

MatrixStack osgUtil::IntersectionVisitor::_viewStack [protected]

MatrixStack osgUtil::IntersectionVisitor::_windowStack [protected]

The documentation for this class was generated from the following file:

osgUtil/IntersectionVisitor

Classes

Public Types

Public Member Functions

Protected Types

Protected Member Functions

Protected Attributes

Detailed Description

Member Typedef Documentation

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation