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Added s/getEventCallback support into osg::Node, and an EVENT_VISITOR

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type into NodeVisitor.
This commit is contained in:
Robert Osfield 2004-10-24 13:51:44 +00:00
parent 052b256267
commit 63e4587a88
4 changed files with 149 additions and 10 deletions
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18
include/osg/Node
View File

@ -140,6 +140,20 @@ class SG_EXPORT Node : public Object
inline unsigned int getNumChildrenRequiringUpdateTraversal() const { return _numChildrenRequiringUpdateTraversal; }
/** Set update node callback, called during update traversal. */
void setEventCallback(NodeCallback* nc);
/** Get update node callback, called during update traversal. */
inline NodeCallback* getEventCallback() { return _eventCallback.get(); }
/** Get const update node callback, called during update traversal. */
inline const NodeCallback* getEventCallback() const { return _eventCallback.get(); }
/** Get the number of Children of this node which require App traversal,
* since they have an AppCallback attached to them or their children.*/
inline unsigned int getNumChildrenRequiringEventTraversal() const { return _numChildrenRequiringEventTraversal; }
/** Set cull node callback, called during cull traversal. */
void setCullCallback(NodeCallback* nc) { _cullCallback = nc; }
@ -259,6 +273,10 @@ class SG_EXPORT Node : public Object
unsigned int _numChildrenRequiringUpdateTraversal;
void setNumChildrenRequiringUpdateTraversal(unsigned int num);
ref_ptr<NodeCallback> _eventCallback;
unsigned int _numChildrenRequiringEventTraversal;
void setNumChildrenRequiringEventTraversal(unsigned int num);
ref_ptr<NodeCallback> _cullCallback;
bool _cullingActive;

1
include/osg/NodeVisitor
View File

@ -69,6 +69,7 @@ class SG_EXPORT NodeVisitor : public virtual Referenced
{
NODE_VISITOR = 0,
UPDATE_VISITOR,
EVENT_VISITOR,
COLLECT_OCCLUDER_VISITOR,
CULL_VISITOR
};

59
src/osg/Group.cpp
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@ -111,6 +111,16 @@ bool Group::insertChild( unsigned int index, Node *child )
);
}
// could now require app traversal thanks to the new subgraph,
// so need to check and update if required.
if (child->getNumChildrenRequiringEventTraversal()>0 ||
child->getEventCallback())
{
setNumChildrenRequiringEventTraversal(
getNumChildrenRequiringEventTraversal()+1
);
}
// could now require disabling of culling thanks to the new subgraph,
// so need to check and update if required.
if (child->getNumChildrenWithCullingDisabled()>0 ||
@ -151,7 +161,8 @@ bool Group::removeChild(unsigned int pos,unsigned int numChildrenToRemove)
endOfRemoveRange=_children.size();
}
unsigned int appCallbackRemoved = 0;
unsigned int updateCallbackRemoved = 0;
unsigned int eventCallbackRemoved = 0;
unsigned int numChildrenWithCullingDisabledRemoved = 0;
unsigned int numChildrenWithOccludersRemoved = 0;
@ -161,7 +172,9 @@ bool Group::removeChild(unsigned int pos,unsigned int numChildrenToRemove)
// remove this Geode from the child parent list.
child->removeParent(this);
if (child->getNumChildrenRequiringUpdateTraversal()>0 || child->getUpdateCallback()) ++appCallbackRemoved;
if (child->getNumChildrenRequiringUpdateTraversal()>0 || child->getUpdateCallback()) ++updateCallbackRemoved;
if (child->getNumChildrenRequiringEventTraversal()>0 || child->getEventCallback()) ++eventCallbackRemoved;
if (child->getNumChildrenWithCullingDisabled()>0 || !child->getCullingActive()) ++numChildrenWithCullingDisabledRemoved;
@ -173,9 +186,14 @@ bool Group::removeChild(unsigned int pos,unsigned int numChildrenToRemove)
childRemoved(pos,endOfRemoveRange-pos);
if (appCallbackRemoved)
if (updateCallbackRemoved)
{
setNumChildrenRequiringUpdateTraversal(getNumChildrenRequiringUpdateTraversal()-appCallbackRemoved);
setNumChildrenRequiringUpdateTraversal(getNumChildrenRequiringUpdateTraversal()-updateCallbackRemoved);
}
if (eventCallbackRemoved)
{
setNumChildrenRequiringEventTraversal(getNumChildrenRequiringEventTraversal()-eventCallbackRemoved);
}
if (numChildrenWithCullingDisabledRemoved)
@ -229,24 +247,45 @@ bool Group::setChild( unsigned int i, Node* newNode )
dirtyBound();
// could now require app traversal thanks to the new subgraph,
// could now require update traversal thanks to the new subgraph,
// so need to check and update if required.
int delta_numChildrenRequiringAppTraversal = 0;
int delta_numChildrenRequiringUpdateTraversal = 0;
if (origNode->getNumChildrenRequiringUpdateTraversal()>0 ||
origNode->getUpdateCallback())
{
--delta_numChildrenRequiringAppTraversal;
--delta_numChildrenRequiringUpdateTraversal;
}
if (newNode->getNumChildrenRequiringUpdateTraversal()>0 ||
newNode->getUpdateCallback())
{
++delta_numChildrenRequiringAppTraversal;
++delta_numChildrenRequiringUpdateTraversal;
}
if (delta_numChildrenRequiringAppTraversal!=0)
if (delta_numChildrenRequiringUpdateTraversal!=0)
{
setNumChildrenRequiringUpdateTraversal(
getNumChildrenRequiringUpdateTraversal()+delta_numChildrenRequiringAppTraversal
getNumChildrenRequiringUpdateTraversal()+delta_numChildrenRequiringUpdateTraversal
);
}
// could now require event traversal thanks to the new subgraph,
// so need to check and Event if required.
int delta_numChildrenRequiringEventTraversal = 0;
if (origNode->getNumChildrenRequiringEventTraversal()>0 ||
origNode->getEventCallback())
{
--delta_numChildrenRequiringEventTraversal;
}
if (newNode->getNumChildrenRequiringEventTraversal()>0 ||
newNode->getEventCallback())
{
++delta_numChildrenRequiringEventTraversal;
}
if (delta_numChildrenRequiringEventTraversal!=0)
{
setNumChildrenRequiringEventTraversal(
getNumChildrenRequiringEventTraversal()+delta_numChildrenRequiringEventTraversal
);
}

81
src/osg/Node.cpp
View File

@ -28,6 +28,8 @@ Node::Node()
_numChildrenRequiringUpdateTraversal = 0;
_numChildrenRequiringEventTraversal = 0;
_cullingActive = true;
_numChildrenWithCullingDisabled = 0;
@ -42,6 +44,7 @@ Node::Node(const Node& node,const CopyOp& copyop):
_parents(), // leave empty as parentList is managed by Group.
_updateCallback(node._updateCallback),
_numChildrenRequiringUpdateTraversal(0), // assume no children yet.
_numChildrenRequiringEventTraversal(0), // assume no children yet.
_cullCallback(node._cullCallback),
_cullingActive(node._cullingActive),
_numChildrenWithCullingDisabled(0), // assume no children yet.
@ -167,6 +170,84 @@ void Node::setNumChildrenRequiringUpdateTraversal(unsigned int num)
}
void Node::setEventCallback(NodeCallback* nc)
{
// if no changes just return.
if (_eventCallback==nc) return;
// app callback has been changed, will need to Event
// both _EventCallback and possibly the numChildrenRequiringAppTraversal
// if the number of callbacks changes.
// Event the parents numChildrenRequiringAppTraversal
// note, if _numChildrenRequiringEventTraversal!=0 then the
// parents won't be affected by any app callback change,
// so no need to inform them.
if (_numChildrenRequiringEventTraversal==0 && !_parents.empty())
{
int delta = 0;
if (_eventCallback.valid()) --delta;
if (nc) ++delta;
if (delta!=0)
{
// the number of callbacks has changed, need to pass this
// on to parents so they know whether app traversal is
// reqired on this subgraph.
for(ParentList::iterator itr =_parents.begin();
itr != _parents.end();
++itr)
{
(*itr)->setNumChildrenRequiringEventTraversal(
(*itr)->getNumChildrenRequiringEventTraversal()+delta );
}
}
}
// set the app callback itself.
_eventCallback = nc;
}
void Node::setNumChildrenRequiringEventTraversal(unsigned int num)
{
// if no changes just return.
if (_numChildrenRequiringEventTraversal==num) return;
// note, if _EventCallback is set then the
// parents won't be affected by any changes to
// _numChildrenRequiringEventTraversal so no need to inform them.
if (!_eventCallback && !_parents.empty())
{
// need to pass on changes to parents.
int delta = 0;
if (_numChildrenRequiringEventTraversal>0) --delta;
if (num>0) ++delta;
if (delta!=0)
{
// the number of callbacks has changed, need to pass this
// on to parents so they know whether app traversal is
// reqired on this subgraph.
for(ParentList::iterator itr =_parents.begin();
itr != _parents.end();
++itr)
{
(*itr)->setNumChildrenRequiringEventTraversal(
(*itr)->getNumChildrenRequiringEventTraversal()+delta
);
}
}
}
// finally Event this objects value.
_numChildrenRequiringEventTraversal=num;
}
void Node::setCullingActive(bool active)
{
// if no changes just return.