FGFS-4.1/OpenSceneGraph
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Added CullCallbacks to osg::Node, and osgUtil::CullVisitor.

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This commit is contained in:
Robert Osfield
2002-04-15 13:15:48 +00:00
parent 0222f10d27
commit bbef7164db
7 changed files with 69 additions and 21 deletions
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11
include/osg/Node
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@@ -112,6 +112,15 @@ class SG_EXPORT Node : public Object
inline const int getNumChildrenRequiringAppTraversal() const { return _numChildrenRequiringAppTraversal; }
/** Set cull node callback, called during cull traversal. */
void setCullCallback(NodeCallback* nc) { _cullCallback = nc; }
/** Get app node callback, called during app traversal. */
inline NodeCallback* getCullCallback() { return _cullCallback.get(); }
/** Get const app node callback, called during app traversal. */
inline const NodeCallback* getCullCallback() const { return _cullCallback.get(); }
/** Set the view frustum/small feature culling of this node to be active or inactive.
* The default value to true for _cullingActive. Used a guide
* to the cull traversal.*/
@@ -220,6 +229,8 @@ class SG_EXPORT Node : public Object
int _numChildrenRequiringAppTraversal;
void setNumChildrenRequiringAppTraversal(const int num);
ref_ptr<NodeCallback> _cullCallback;
bool _cullingActive;
int _numChildrenWithCullingDisabled;
void setNumChildrenWithCullingDisabled(const int num);

8
include/osg/NodeCallback
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@@ -22,7 +22,13 @@ class SG_EXPORT NodeCallback : public Referenced {
/** Callback method call by the NodeVisitor when visiting a node.*/
virtual void operator()(Node*, NodeVisitor*) {}
virtual void operator()(Node* node, NodeVisitor* nv)
{
// note, callback is repsonsible for scenegraph traversal so
// should always include call the traverse(node,nv) to ensure
// that the rest of cullbacks and the scene graph are traversed.
traverse(node,nv);
}
/** Call any nested callbacks and then traverse the scene graph. */
void traverse(Node* node,NodeVisitor* nv);

22
include/osgUtil/AppVisitor
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@@ -13,6 +13,7 @@
#include <osg/Switch>
#include <osg/LightSource>
#include <osg/Transform>
#include <osg/Projection>
#include <osg/Impostor>
#include <osgUtil/Export>
@@ -33,17 +34,18 @@ class OSGUTIL_EXPORT AppVisitor : public osg::NodeVisitor
virtual void reset();
virtual void apply(osg::Node& node) { handle_callbacks(node); }
virtual void apply(osg::Node& node) { handle_callbacks_and_traverse(node); }
virtual void apply(osg::Geode& node) { handle_callbacks(node); }
virtual void apply(osg::Billboard& node) { handle_callbacks(node); }
virtual void apply(osg::LightSource& node){ handle_callbacks(node); }
virtual void apply(osg::Geode& node) { handle_callbacks_and_traverse(node); }
virtual void apply(osg::Billboard& node) { handle_callbacks_and_traverse(node); }
virtual void apply(osg::LightSource& node){ handle_callbacks_and_traverse(node); }
virtual void apply(osg::Group& node) { handle_callbacks(node); }
virtual void apply(osg::Transform& node) { handle_callbacks(node); }
virtual void apply(osg::Switch& node) { handle_callbacks(node); }
virtual void apply(osg::LOD& node) { handle_callbacks(node); }
virtual void apply(osg::Impostor& node) { handle_callbacks(node); }
virtual void apply(osg::Group& node) { handle_callbacks_and_traverse(node); }
virtual void apply(osg::Transform& node) { handle_callbacks_and_traverse(node); }
virtual void apply(osg::Projection& node) { handle_callbacks_and_traverse(node); }
virtual void apply(osg::Switch& node) { handle_callbacks_and_traverse(node); }
virtual void apply(osg::LOD& node) { handle_callbacks_and_traverse(node); }
virtual void apply(osg::Impostor& node) { handle_callbacks_and_traverse(node); }
protected:
@@ -54,7 +56,7 @@ class OSGUTIL_EXPORT AppVisitor : public osg::NodeVisitor
/** prevent unwanted copy operator.*/
AppVisitor& operator = (const AppVisitor&) { return *this; }
inline void handle_callbacks(osg::Node& node)
inline void handle_callbacks_and_traverse(osg::Node& node)
{
osg::NodeCallback* callback = node.getAppCallback();
if (callback) (*callback)(&node,this);

14
include/osgUtil/CullVisitor
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@@ -183,6 +183,20 @@ class OSGUTIL_EXPORT CullVisitor : public osg::NodeVisitor
/** prevent unwanted copy operator.*/
CullVisitor& operator = (const CullVisitor&) { return *this; }
inline void handle_cull_callbacks_and_traverse(osg::Node& node)
{
osg::NodeCallback* callback = node.getCullCallback();
if (callback) (*callback)(&node,this);
else traverse(node);
}
inline void handle_cull_callbacks_and_accept(osg::Node& node,osg::Node* acceptNode)
{
osg::NodeCallback* callback = node.getCullCallback();
if (callback) (*callback)(&node,this);
else acceptNode->accept(*this);
}
inline osg::Matrix* getCurrentMatrix()
{
return _modelviewStack.back().get();