osgUtil::PolytopeIntersector Class Reference

Inheritance diagram for osgUtil::PolytopeIntersector:

osgUtil::Intersector osg::Referenced

List of all members.

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 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 ()

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

Classes

struct  Intersection


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

void osgUtil::PolytopeIntersector::insertIntersection ( const Intersection intersection  )  [inline]

Intersections& osgUtil::PolytopeIntersector::getIntersections (  )  [inline]

Intersection osgUtil::PolytopeIntersector::getFirstIntersection (  )  [inline]

unsigned int osgUtil::PolytopeIntersector::getDimensionMask (  )  const [inline]

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 )

const osg::Plane& osgUtil::PolytopeIntersector::getReferencePlane (  )  const [inline]

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.

virtual Intersector* osgUtil::PolytopeIntersector::clone ( osgUtil::IntersectionVisitor iv  )  [virtual]

Implements osgUtil::Intersector.

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

Implements osgUtil::Intersector.

virtual void osgUtil::PolytopeIntersector::leave (  )  [virtual]

Implements osgUtil::Intersector.

virtual void osgUtil::PolytopeIntersector::intersect ( osgUtil::IntersectionVisitor iv,
osg::Drawable drawable 
) [virtual]

Implements osgUtil::Intersector.

virtual void osgUtil::PolytopeIntersector::reset (  )  [virtual]

Reimplemented from osgUtil::Intersector.

virtual bool osgUtil::PolytopeIntersector::containsIntersections (  )  [inline, virtual]

Implements osgUtil::Intersector.


Member Data Documentation

mask which dimensions should be checked

plane to use for sorting intersections


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

Generated on Wed Jul 30 23:59:08 2008 for openscenegraph by  doxygen 1.5.6