FGFS-4.1/OpenSceneGraph
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Added support notification of Drawable parents of StateSet that event/update callbacks have been called.

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This commit is contained in:
Robert Osfield
2005-04-26 09:58:19 +00:00
parent 38bf740ef4
commit 3c90a5f694
3 changed files with 92 additions and 5 deletions
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81
src/osg/Drawable.cpp
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@@ -271,6 +271,9 @@ Drawable::Drawable()
_supportsVertexBufferObjects = false;
_useVertexBufferObjects = false;
_numChildrenRequiringUpdateTraversal = 0;
_numChildrenRequiringEventTraversal = 0;
}
Drawable::Drawable(const Drawable& drawable,const CopyOp& copyop):
@@ -285,6 +288,9 @@ Drawable::Drawable(const Drawable& drawable,const CopyOp& copyop):
_supportsVertexBufferObjects(drawable._supportsVertexBufferObjects),
_useVertexBufferObjects(drawable._useVertexBufferObjects),
_updateCallback(drawable._updateCallback),
_numChildrenRequiringUpdateTraversal(drawable._numChildrenRequiringUpdateTraversal),
_eventCallback(drawable._eventCallback),
_numChildrenRequiringEventTraversal(drawable._numChildrenRequiringEventTraversal),
_cullCallback(drawable._cullCallback),
_drawCallback(drawable._drawCallback)
{
@@ -343,7 +349,7 @@ void Drawable::setStateSet(osg::StateSet* stateset)
itr!=_parents.end();
++itr)
{
(*itr)->setNumChildrenRequiringUpdateTraversal((*itr)->getNumChildrenRequiringUpdateTraversal()+delta_update);
(*itr)->setNumChildrenRequiringUpdateTraversal( (*itr)->getNumChildrenRequiringUpdateTraversal()+delta_update );
}
}
@@ -354,13 +360,82 @@ void Drawable::setStateSet(osg::StateSet* stateset)
itr!=_parents.end();
++itr)
{
(*itr)->setNumChildrenRequiringEventTraversal((*itr)->getNumChildrenRequiringEventTraversal()+delta_event);
(*itr)->setNumChildrenRequiringEventTraversal( (*itr)->getNumChildrenRequiringEventTraversal()+delta_event );
}
}
}
void Drawable::setNumChildrenRequiringUpdateTraversal(unsigned int num)
{
// if no changes just return.
if (_numChildrenRequiringUpdateTraversal==num) return;
// note, if _updateCallback is set then the
// parents won't be affected by any changes to
// _numChildrenRequiringUpdateTraversal so no need to inform them.
if (!_updateCallback && !_parents.empty())
{
// need to pass on changes to parents.
int delta = 0;
if (_numChildrenRequiringUpdateTraversal>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)->setNumChildrenRequiringUpdateTraversal( (*itr)->getNumChildrenRequiringUpdateTraversal()+delta );
}
}
}
// finally update this objects value.
_numChildrenRequiringUpdateTraversal=num;
}
void Drawable::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;
}
osg::StateSet* Drawable::getOrCreateStateSet()
{
if (!_stateset) setStateSet(new StateSet);
@@ -568,7 +643,7 @@ void Drawable::setEventCallback(EventCallback* ac)
itr!=_parents.end();
++itr)
{
(*itr)->setNumChildrenRequiringEventTraversal((*itr)->getNumChildrenRequiringEventTraversal()+delta);
(*itr)->setNumChildrenRequiringEventTraversal( (*itr)->getNumChildrenRequiringEventTraversal()+delta );
}
}
}