FGFS-4.1/OpenSceneGraph
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Added new Node/Drawable::s/getInitialBound and Node/Drawable::s/getComputeBoundCallback

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methods and reimplement computeBound so that it passes back a bounding volume rather
than modifying the local one.
This commit is contained in:
Robert Osfield
2005-05-12 14:03:22 +00:00
parent ad2bd31ac8
commit bf4d63f6ea
52 changed files with 337 additions and 377 deletions
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61
include/osg/Node
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@@ -231,22 +231,57 @@ class OSG_EXPORT Node : public Object
/** Return the node's StateSet. returns NULL if a stateset is not attached.*/
inline osg::StateSet* getStateSet() { return _stateset.get(); }
/** return the node's const StateSet. Returns NULL if a stateset is not attached.*/
/** Return the node's const StateSet. Returns NULL if a stateset is not attached.*/
inline const osg::StateSet* getStateSet() const { return _stateset.get(); }
/** get the bounding sphere of node.
Using lazy evaluation computes the bounding sphere if it is 'dirty'.*/
inline const BoundingSphere& getBound() const
{
if(!_bsphere_computed) computeBound();
return _bsphere;
}
/** Set the intial bounding volume to use when computing the overall bounding volume.*/
void setInitialBound(const osg::BoundingSphere& bsphere) { _initialBound = bsphere; dirtyBound(); }
/** Set the intial bounding volume to use when computing the overall bounding volume.*/
const BoundingSphere& getInitialBound() const { return _initialBound; }
/** Mark this node's bounding sphere dirty.
Forcing it to be computed on the next call to getBound().*/
void dirtyBound();
/** Get the bounding sphere of node.
Using lazy evaluation computes the bounding sphere if it is 'dirty'.*/
inline const BoundingSphere& getBound() const
{
if(!_boundingSphereComputed)
{
_boundingSphere = _initialBound;
if (_computeBoundCallback.valid())
_boundingSphere.expandBy(_computeBoundCallback->computeBound(*this));
else
_boundingSphere.expandBy(computeBound());
_boundingSphereComputed = true;
}
return _boundingSphere;
}
/** Compute the bounding sphere around Node's geometry or children.
This method is automatically called by getBound() when the bounding
sphere has been marked dirty via dirtyBound().*/
virtual BoundingSphere computeBound() const;
/** Callback to allow users to override the default computation of bounding volume.*/
struct ComputeBoundCallback : public osg::Referenced
{
virtual BoundingSphere computeBound(const osg::Node&) const = 0;
};
/** Set the compute bound callback to override the default computeBound.*/
void setComputeBoundCallback(ComputeBoundCallback* callback) { _computeBoundCallback = callback; }
/** Get the compute bound callback.*/
ComputeBoundCallback* getComputeBoundCallback() { return _computeBoundCallback.get(); }
/** Get the const compute bound callback.*/
const ComputeBoundCallback* getComputeBoundCallback() const { return _computeBoundCallback.get(); }
/** If State is non-zero, this function releases any associated OpenGL objects for
* the specified graphics context. Otherwise, releases OpenGL objexts
@@ -266,13 +301,11 @@ class OSG_EXPORT Node : public Object
virtual ~Node();
/** Compute the bounding sphere around Node's geometry or children.
This method is automatically called by getBound() when the bounding
sphere has been marked dirty via dirtyBound().*/
virtual bool computeBound() const;
mutable BoundingSphere _bsphere;
mutable bool _bsphere_computed;
BoundingSphere _initialBound;
ref_ptr<ComputeBoundCallback> _computeBoundCallback;
mutable BoundingSphere _boundingSphere;
mutable bool _boundingSphereComputed;
std::string _name;