osgUtil::PolytopeIntersector Class Reference

#include <PolytopeIntersector.h>

Inheritance diagram for osgUtil::PolytopeIntersector:

Collaboration diagram for osgUtil::PolytopeIntersector:

Classes
struct	Intersection

Public Types
enum	{ DimZero = (1<<0), DimOne = (1<<1), DimTwo = (1<<2), AllDims = (DimZero | DimOne | DimTwo) }
	dimension enum to specify primitive types to check. More...
typedef osg::Plane::Vec3_type	Vec3_type
typedef std::set< Intersection >	Intersections
Public Types inherited from osgUtil::Intersector
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 }

Public Member Functions
	PolytopeIntersector (const osg::Polytope &polytope)
	PolytopeIntersector (CoordinateFrame cf, const osg::Polytope &polytope)
	PolytopeIntersector (CoordinateFrame cf, double xMin, double yMin, double xMax, double yMax)
void	insertIntersection (const Intersection &intersection)
Intersections &	getIntersections ()
Intersection	getFirstIntersection ()
unsigned int	getDimensionMask () const
void	setDimensionMask (unsigned int dimensionMask)
const osg::Plane &	getReferencePlane () const
void	setReferencePlane (const osg::Plane &plane)
virtual Intersector *	clone (osgUtil::IntersectionVisitor &iv)
virtual bool	enter (const osg::Node &node)
virtual void	leave ()
virtual void	intersect (osgUtil::IntersectionVisitor &iv, osg::Drawable *drawable)
virtual void	reset ()
virtual bool	containsIntersections ()
Public Member Functions inherited from osgUtil::Intersector
	Intersector (CoordinateFrame cf=MODEL, IntersectionLimit il=NO_LIMIT)
void	setCoordinateFrame (CoordinateFrame cf)
CoordinateFrame	getCoordinateFrame () const
void	setIntersectionLimit (IntersectionLimit limit)
IntersectionLimit	getIntersectionLimit () const
bool	disabled () const
void	incrementDisabledCount ()
void	decrementDisabledCount ()
bool	reachedLimit ()
void	setPrecisionHint (PrecisionHint hint)
PrecisionHint	getPrecisionHint () const
Public Member Functions inherited from osg::Referenced
	Referenced ()
	Referenced (bool threadSafeRefUnref)
	Referenced (const Referenced &)
Referenced &	operator= (const Referenced &)
virtual void	setThreadSafeRefUnref (bool threadSafe)
bool	getThreadSafeRefUnref () const
OpenThreads::Mutex *	getRefMutex () const
int	ref () const
int	unref () const
int	unref_nodelete () const
int	referenceCount () const
ObserverSet *	getObserverSet () const
ObserverSet *	getOrCreateObserverSet () const
void	addObserver (Observer *observer) const
void	removeObserver (Observer *observer) const

Protected Attributes
PolytopeIntersector *	_parent
osg::Polytope	_polytope
unsigned int	_dimensionMask
	mask which dimensions should be checked More...
osg::Plane	_referencePlane
	plane to use for sorting intersections More...
Intersections	_intersections
Protected Attributes inherited from osgUtil::Intersector
CoordinateFrame	_coordinateFrame
IntersectionLimit	_intersectionLimit
unsigned int	_disabledCount
PrecisionHint	_precisionHint
Protected Attributes inherited from osg::Referenced
OpenThreads::AtomicPtr	_observerSet
OpenThreads::Atomic	_refCount

Additional Inherited Members
Static Public Member Functions inherited from osg::Referenced
static OpenThreads::Mutex *	getGlobalReferencedMutex ()
static void	setThreadSafeReferenceCounting (bool enableThreadSafeReferenceCounting)
static bool	getThreadSafeReferenceCounting ()
static void	setDeleteHandler (DeleteHandler *handler)
static DeleteHandler *	getDeleteHandler ()
Protected Member Functions inherited from osg::Referenced
virtual	~Referenced ()
void	signalObserversAndDelete (bool signalDelete, bool doDelete) const
void	deleteUsingDeleteHandler () const

Detailed Description

Concrete class for implementing polytope intersections with the scene graph. To be used in conjunction with IntersectionVisitor.

Definition at line 24 of file PolytopeIntersector.h.

Member Typedef Documentation

typedef std::set<Intersection> osgUtil::PolytopeIntersector::Intersections

Definition at line 81 of file PolytopeIntersector.h.

typedef osg::Plane::Vec3_type osgUtil::PolytopeIntersector::Vec3_type

Definition at line 47 of file PolytopeIntersector.h.

Member Enumeration Documentation

anonymous enum

dimension enum to specify primitive types to check.

Enumerator
DimZero	check for points
DimOne	check for lines
DimTwo	check for triangles, quad
AllDims

Definition at line 28 of file PolytopeIntersector.h.

Constructor & Destructor Documentation

osgUtil::PolytopeIntersector::PolytopeIntersector

(

const osg::Polytope &

polytope

)

Construct a PolytopeIntersector using specified polytope in MODEL coordinates.

osgUtil::PolytopeIntersector::PolytopeIntersector	(	CoordinateFrame	cf,
		const osg::Polytope &	polytope
	)

Construct a PolytopeIntersector using specified polytope in specified coordinate frame.

osgUtil::PolytopeIntersector::PolytopeIntersector	(	CoordinateFrame	cf,
		double	xMin,
		double	yMin,
		double	xMax,
		double	yMax
	)

Convenience constructor for supporting picking in WINDOW, or PROJECTION coordinates In WINDOW coordinates (clip space cube) creates a five sided polytope box that has a front face at 0.0 and sides around box xMin, yMin, xMax, yMax. In PROJECTION coordinates (clip space cube) creates a five sided polytope box that has a front face at -1 and sides around box xMin, yMin, xMax, yMax. In VIEW and MODEL coordinates (clip space cube) creates a five sided polytope box that has a front face at 0.0 and sides around box xMin, yMin, xMax, yMax.

Member Function Documentation

virtual Intersector* osgUtil::PolytopeIntersector::clone ( osgUtil::IntersectionVisitor &  iv )

virtual

Implements osgUtil::Intersector.

virtual bool osgUtil::PolytopeIntersector::containsIntersections ( )

inlinevirtual

Implements osgUtil::Intersector.

Definition at line 118 of file PolytopeIntersector.h.

virtual bool osgUtil::PolytopeIntersector::enter ( const osg::Node &  node )

virtual

Implements osgUtil::Intersector.

unsigned int osgUtil::PolytopeIntersector::getDimensionMask ( ) const

inline

Definition at line 89 of file PolytopeIntersector.h.

Intersection osgUtil::PolytopeIntersector::getFirstIntersection ( )

inline

Definition at line 87 of file PolytopeIntersector.h.

Intersections& osgUtil::PolytopeIntersector::getIntersections ( )

inline

Definition at line 85 of file PolytopeIntersector.h.

const osg::Plane& osgUtil::PolytopeIntersector::getReferencePlane ( ) const

inline

Definition at line 97 of file PolytopeIntersector.h.

void osgUtil::PolytopeIntersector::insertIntersection ( const Intersection &  intersection )

inline

Definition at line 83 of file PolytopeIntersector.h.

virtual void osgUtil::PolytopeIntersector::intersect ( osgUtil::IntersectionVisitor &  iv, osg::Drawable *  drawable  )

virtual

Implements osgUtil::Intersector.

virtual void osgUtil::PolytopeIntersector::leave ( )

virtual

Implements osgUtil::Intersector.

virtual void osgUtil::PolytopeIntersector::reset ( )

virtual

Reimplemented from osgUtil::Intersector.

void osgUtil::PolytopeIntersector::setDimensionMask ( unsigned int  dimensionMask )

inline

set the dimension mask. As polytope-triangle and polytope-quad intersections are expensive to compute it is possible to turn them off by calling setDimensionMask( DimZero | DimOne )

Definition at line 95 of file PolytopeIntersector.h.

void osgUtil::PolytopeIntersector::setReferencePlane ( const osg::Plane &  plane )

inline

set the plane used to sort the intersections. The intersections are sorted by the distance of the localIntersectionPoint and the reference plane. The default for the reference plane is the last plane of the polytope.

Definition at line 104 of file PolytopeIntersector.h.

Member Data Documentation

unsigned int osgUtil::PolytopeIntersector::_dimensionMask

protected

mask which dimensions should be checked

Definition at line 126 of file PolytopeIntersector.h.

Intersections osgUtil::PolytopeIntersector::_intersections

protected

Definition at line 129 of file PolytopeIntersector.h.

PolytopeIntersector* osgUtil::PolytopeIntersector::_parent

protected

Definition at line 122 of file PolytopeIntersector.h.

osg::Polytope osgUtil::PolytopeIntersector::_polytope

protected

Definition at line 124 of file PolytopeIntersector.h.

osg::Plane osgUtil::PolytopeIntersector::_referencePlane

protected

plane to use for sorting intersections

Definition at line 127 of file PolytopeIntersector.h.

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

• osg_head/include/osgUtil/PolytopeIntersector.h