Concrete class for implementing polytope intersections with the scene graph.
More...
List of all members.
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 |
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
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 |
) |
|
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 bool osgUtil::PolytopeIntersector::containsIntersections |
( |
|
) |
[inline, virtual] |
virtual bool osgUtil::PolytopeIntersector::enter |
( |
const osg::Node & |
node |
) |
[virtual] |
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::leave |
( |
|
) |
[virtual] |
virtual void osgUtil::PolytopeIntersector::reset |
( |
|
) |
[virtual] |
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
mask which dimensions should be checked
plane to use for sorting intersections
The documentation for this class was generated from the following file: