openscenegraph
Classes | Public Types | Public Member Functions | Protected Attributes | List of all members
osgUtil::PolytopeIntersector Class Reference
Inheritance diagram for osgUtil::PolytopeIntersector:
osgUtil::Intersector osg::Referenced

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 std::set< IntersectionIntersections
- Public Types inherited from osgUtil::Intersector
enum  CoordinateFrame { WINDOW, PROJECTION, VIEW, MODEL }
enum  IntersectionLimit { NO_LIMIT, LIMIT_ONE_PER_DRAWABLE, LIMIT_ONE, LIMIT_NEAREST }

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)
IntersectionsgetIntersections ()
Intersection getFirstIntersection ()
unsigned int getDimensionMask () const
void setDimensionMask (unsigned int dimensionMask)
const osg::PlanegetReferencePlane () const
void setReferencePlane (const osg::Plane &plane)
virtual Intersectorclone (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)
void setCoordinateFrame (CoordinateFrame cf)
CoordinateFrame getCoordinateFrame () const
void setIntersectionLimit (IntersectionLimit limit)
IntersectionLimit getIntersectionLimit () const
bool disabled () const
void incrementDisabledCount ()
void decrementDisabledCount ()
bool reachedLimit ()
- Public Member Functions inherited from osg::Referenced
 Referenced ()
 Referenced (bool threadSafeRefUnref)
 Referenced (const Referenced &)
Referencedoperator= (const Referenced &)
virtual void setThreadSafeRefUnref (bool threadSafe)
bool getThreadSafeRefUnref () const
OpenThreads::MutexgetRefMutex () const
int ref () const
int unref () const
int unref_nodelete () const
int referenceCount () const
ObserverSetgetObserverSet () const
ObserverSetgetOrCreateObserverSet () 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
osg::Plane _referencePlane
 plane to use for sorting intersections
Intersections _intersections
- Protected Attributes inherited from osgUtil::Intersector
CoordinateFrame _coordinateFrame
IntersectionLimit _intersectionLimit
unsigned int _disabledCount
- 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::MutexgetGlobalReferencedMutex ()
static void setThreadSafeReferenceCounting (bool enableThreadSafeReferenceCounting)
static bool getThreadSafeReferenceCounting ()
static void setDeleteHandler (DeleteHandler *handler)
static DeleteHandlergetDeleteHandler ()
- 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.

Member Typedef Documentation

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 

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.

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

Implements osgUtil::Intersector.

unsigned int osgUtil::PolytopeIntersector::getDimensionMask ( ) const
inline
Intersection osgUtil::PolytopeIntersector::getFirstIntersection ( )
inline
Intersections& osgUtil::PolytopeIntersector::getIntersections ( )
inline
const osg::Plane& osgUtil::PolytopeIntersector::getReferencePlane ( ) const
inline
void osgUtil::PolytopeIntersector::insertIntersection ( const Intersection intersection)
inline
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 )

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.

Member Data Documentation

unsigned int osgUtil::PolytopeIntersector::_dimensionMask
protected

mask which dimensions should be checked

Intersections osgUtil::PolytopeIntersector::_intersections
protected
PolytopeIntersector* osgUtil::PolytopeIntersector::_parent
protected
osg::Polytope osgUtil::PolytopeIntersector::_polytope
protected
osg::Plane osgUtil::PolytopeIntersector::_referencePlane
protected

plane to use for sorting intersections


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