OpenSceneGraph 2.8.4
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Concrete class for implementing polytope intersections with the scene graph. More...
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< Intersection > | Intersections |
Public Member Functions | |
PolytopeIntersector (const osg::Polytope &polytope) | |
Construct a PolytopeIntersector using specified polytope in MODEL coordinates. | |
PolytopeIntersector (CoordinateFrame cf, const osg::Polytope &polytope) | |
Construct a PolytopeIntersector using specified polytope in specified coordinate frame. | |
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. | |
void | insertIntersection (const Intersection &intersection) |
Intersections & | getIntersections () |
Intersection | getFirstIntersection () |
unsigned int | getDimensionMask () const |
void | setDimensionMask (unsigned int dimensionMask) |
set the dimension mask. | |
const osg::Plane & | getReferencePlane () const |
void | setReferencePlane (const osg::Plane &plane) |
set the plane used to sort the intersections. | |
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 () |
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 |
Concrete class for implementing polytope intersections with the scene graph.
To be used in conjunction with IntersectionVisitor.
typedef std::set<Intersection> osgUtil::PolytopeIntersector::Intersections |
anonymous enum |
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.
virtual Intersector* osgUtil::PolytopeIntersector::clone | ( | osgUtil::IntersectionVisitor & | iv | ) | [virtual] |
Implements osgUtil::Intersector.
virtual bool osgUtil::PolytopeIntersector::containsIntersections | ( | ) | [inline, virtual] |
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.
unsigned int osgUtil::PolytopeIntersector::_dimensionMask [protected] |
mask which dimensions should be checked
PolytopeIntersector* osgUtil::PolytopeIntersector::_parent [protected] |
osg::Polytope osgUtil::PolytopeIntersector::_polytope [protected] |
plane to use for sorting intersections
![]() | Generated at Sun Jan 8 2012 13:17:02 for the OpenSceneGraph by doxygen 1.7.4. |