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NAME

       SoBoundingBoxCache -

       The SoBoundingBoxCache class is used to cache bounding boxes.

SYNOPSIS

       #include <Inventor/caches/SoBoundingBoxCache.h>

       Inherits SoCache.

   Public Member Functions
       SoBoundingBoxCache (SoState *state)
       virtual ~SoBoundingBoxCache ()
       void set (const SbXfBox3f &boundingbox, SbBool centerset, const SbVec3f
           &centerpoint)
       const SbXfBox3f & getBox () const
       const SbBox3f & getProjectedBox () const
       SbBool isCenterSet () const
       const SbVec3f & getCenter () const
       SbBool hasLinesOrPoints (void) const

   Static Public Member Functions
       static void setHasLinesOrPoints (SoState *state)

Detailed Description

       The SoBoundingBoxCache class is used to cache bounding boxes.

Constructor & Destructor Documentation

   SoBoundingBoxCache::SoBoundingBoxCache (SoState * state) Constructor with
       state being the current state.
   SoBoundingBoxCache::~SoBoundingBoxCache () [virtual] Destructor.

Member Function Documentation

   void SoBoundingBoxCache::set (const SbXfBox3f & boundingbox, SbBool
       centerset, const SbVec3f & centerpoint) Sets the data for this cache.
       boundingBox is the node’s bounding box, centerSet and centerPoints
       specifies the center of the geometry inside boundingBox.
   const SbXfBox3f & SoBoundingBoxCache::getBox (void) const Returns the
       bounding box for this cache.
   const SbBox3f & SoBoundingBoxCache::getProjectedBox (void) const Returns
       the projected bounding box for this cache.
   SbBool SoBoundingBoxCache::isCenterSet (void) const Returns whether the
       center of the bounding box was set in the SoBoundingBoxCache::set()
       method.
       See also:
           SoBoundingBoxCache::getCenter()

   const SbVec3f & SoBoundingBoxCache::getCenter (void) const Returns the
       center of the bounding box. Should only be used if
       SoBoundingBoxCache::isCenterSet() returns TRUE.
   void SoBoundingBoxCache::setHasLinesOrPoints (SoState * state) [static]
       Sets the flag returned from SoBoundingBoxCache::hasLinesOrPoints() to
       TRUE for all open bounding box caches.
       The reason bounding box caches keep a lines-or-points flag is to make
       it known to client code if the shape(s) they contain have any of these
       primitives -- or are rendered with these primitives. The reason this is
       important to know for the client code is because it might need to add
       an ’epsilon’ slack value to the calculated bounding box to account for
       smoothing / anti-aliasing effects in the renderer, so lines and points
       graphics is not accidently clipped by near and far clipping planes, for
       instance.

       This method is a static method on the class. It will upon invocation
       scan through the state stack and set the flag for all open
       SoBoundingBoxCache elements. It has been made to work like this so it
       can easily be invoked on all current bounding box cache instances from
       the SoShape-type nodes using lines and / or point primitives.

       See also:
           hasLinesOrPoints()

   SbBool SoBoundingBoxCache::hasLinesOrPoints (void) const Return TRUE if the
       hasLinesOrPoints flag has been set.
       See also:
           setHasLinesOrPoints()

Author

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