osgUtil::Intersector Class Reference

Pure virtual base class for implementing custom intersection technique. More...

Inheritance diagram for osgUtil::Intersector:

List of all members.

Public Types
enum	CoordinateFrame { WINDOW, PROJECTION, VIEW, MODEL }
enum	IntersectionLimit { NO_LIMIT, LIMIT_ONE_PER_DRAWABLE, LIMIT_ONE, LIMIT_NEAREST }
enum	PrecisionHint { USE_DOUBLE_CALCULATIONS, USE_FLOAT_CALCULATIONS }
	Hint to precision used in the internal intersections calculations. More...
Public Member Functions
	Intersector (CoordinateFrame cf=MODEL, IntersectionLimit il=NO_LIMIT)
void	setCoordinateFrame (CoordinateFrame cf)
CoordinateFrame	getCoordinateFrame () const
void	setIntersectionLimit (IntersectionLimit limit)
IntersectionLimit	getIntersectionLimit () const
virtual Intersector *	clone (osgUtil::IntersectionVisitor &iv)=0
virtual bool	enter (const osg::Node &node)=0
virtual void	leave ()=0
virtual void	intersect (osgUtil::IntersectionVisitor &iv, osg::Drawable *drawable)=0
virtual void	reset ()
virtual bool	containsIntersections ()=0
bool	disabled () const
void	incrementDisabledCount ()
void	decrementDisabledCount ()
bool	reachedLimit ()
void	setPrecisionHint (PrecisionHint hint)
	Set the hint to what precision to use in the intersections calculations.
PrecisionHint	getPrecisionHint () const
	Get the hint to what precision should be used in the intersections calculations.
Protected Attributes
CoordinateFrame	_coordinateFrame
IntersectionLimit	_intersectionLimit
unsigned int	_disabledCount
PrecisionHint	_precisionHint

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Detailed Description

Pure virtual base class for implementing custom intersection technique.

To implement a specific intersection technique on must override all the pure virtual methods, concrete examples of how to do this can be seen in the LineSegmentIntersector.

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Member Enumeration Documentation

enum osgUtil::Intersector::CoordinateFrame

Enumerator:

WINDOW
PROJECTION
VIEW
MODEL

enum osgUtil::Intersector::IntersectionLimit

Enumerator:

NO_LIMIT
LIMIT_ONE_PER_DRAWABLE
LIMIT_ONE
LIMIT_NEAREST

enum osgUtil::Intersector::PrecisionHint

Hint to precision used in the internal intersections calculations.

Enumerator:

USE_DOUBLE_CALCULATIONS
USE_FLOAT_CALCULATIONS

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Constructor & Destructor Documentation

osgUtil::Intersector::Intersector	(	CoordinateFrame	cf = MODEL,
		IntersectionLimit	il = NO_LIMIT
	)		[inline]

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Member Function Documentation

virtual Intersector* osgUtil::Intersector::clone

(

osgUtil::IntersectionVisitor &

iv

)

[pure virtual]

Implemented in osgUtil::IntersectorGroup, osgUtil::PolytopeIntersector, osgUtil::RayIntersector, osgUtil::LineSegmentIntersector, and osgUtil::PlaneIntersector.

virtual bool osgUtil::Intersector::containsIntersections

(

)

[pure virtual]

Implemented in osgUtil::IntersectorGroup, osgUtil::PolytopeIntersector, osgUtil::RayIntersector, osgUtil::LineSegmentIntersector, and osgUtil::PlaneIntersector.

Referenced by reachedLimit().

void osgUtil::Intersector::decrementDisabledCount

(

)

[inline]

References _disabledCount.

bool osgUtil::Intersector::disabled

(

)

const [inline]

References _disabledCount.

virtual bool osgUtil::Intersector::enter

(

const osg::Node &

node

)

[pure virtual]

Implemented in osgUtil::IntersectorGroup, osgUtil::PolytopeIntersector, osgUtil::RayIntersector, osgUtil::LineSegmentIntersector, and osgUtil::PlaneIntersector.

CoordinateFrame osgUtil::Intersector::getCoordinateFrame

(

)

const [inline]

References _coordinateFrame.

IntersectionLimit osgUtil::Intersector::getIntersectionLimit

(

)

const [inline]

References _intersectionLimit.

PrecisionHint osgUtil::Intersector::getPrecisionHint

(

)

const [inline]

Get the hint to what precision should be used in the intersections calculations.

References _precisionHint.

void osgUtil::Intersector::incrementDisabledCount

(

)

[inline]

References _disabledCount.

virtual void osgUtil::Intersector::intersect	(	osgUtil::IntersectionVisitor &	iv,
		osg::Drawable *	drawable
	)		[pure virtual]

Implemented in osgUtil::IntersectorGroup, osgUtil::PolytopeIntersector, osgUtil::RayIntersector, osgUtil::LineSegmentIntersector, and osgUtil::PlaneIntersector.

virtual void osgUtil::Intersector::leave

(

)

[pure virtual]

Implemented in osgUtil::IntersectorGroup, osgUtil::PolytopeIntersector, osgUtil::RayIntersector, osgUtil::LineSegmentIntersector, and osgUtil::PlaneIntersector.

bool osgUtil::Intersector::reachedLimit

(

)

[inline]

References _intersectionLimit, containsIntersections(), and LIMIT_ONE.

virtual void osgUtil::Intersector::reset

(

)

[inline, virtual]

Reimplemented in osgUtil::IntersectorGroup, osgUtil::PolytopeIntersector, osgUtil::RayIntersector, osgUtil::LineSegmentIntersector, and osgUtil::PlaneIntersector.

References _disabledCount.

void osgUtil::Intersector::setCoordinateFrame

(

CoordinateFrame

cf

)

[inline]

References _coordinateFrame.

void osgUtil::Intersector::setIntersectionLimit

(

IntersectionLimit

limit

)

[inline]

References _intersectionLimit.

void osgUtil::Intersector::setPrecisionHint

(

PrecisionHint

hint

)

[inline]

Set the hint to what precision to use in the intersections calculations.

References _precisionHint.

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Member Data Documentation

CoordinateFrame osgUtil::Intersector::_coordinateFrame [protected]

Referenced by getCoordinateFrame(), and setCoordinateFrame().

unsigned int osgUtil::Intersector::_disabledCount [protected]

Referenced by decrementDisabledCount(), disabled(), incrementDisabledCount(), and reset().

IntersectionLimit osgUtil::Intersector::_intersectionLimit [protected]

Referenced by getIntersectionLimit(), reachedLimit(), and setIntersectionLimit().

PrecisionHint osgUtil::Intersector::_precisionHint [protected]

Referenced by getPrecisionHint(), and setPrecisionHint().

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

• osgUtil/IntersectionVisitor