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#include "InstanceWalkers.h"
#include "iscenegraph.h"
namespace scene
{
InstanceSubgraphWalker::InstanceSubgraphWalker(GraphPtr& sceneGraph) :
_sceneGraph(sceneGraph)
{}
bool InstanceSubgraphWalker::pre(const scene::INodePtr& node)
{
// greebo: Register this new node with the scenegraph
if (!node->inScene())
{
_sceneGraph->insert(node);
node->setSceneGraph(_sceneGraph);
}
_nodeStack.push(node);
return true;
}
void InstanceSubgraphWalker::post(const INodePtr& node)
{
_nodeStack.pop();
if (!_nodeStack.empty())
{
if (node->getParent() != _nodeStack.top())
{
// Parent-child mismatch, adjust
node->setParent(_nodeStack.top());
}
}
}
// ==============================================================================================
UninstanceSubgraphWalker::UninstanceSubgraphWalker(Graph& sceneGraph) :
_sceneGraph(sceneGraph)
{}
bool UninstanceSubgraphWalker::pre(const scene::INodePtr& node)
{
return true;
}
void UninstanceSubgraphWalker::post(const scene::INodePtr& node)
{
// Notify the Scenegraph about the upcoming deletion
if (node->inScene())
{
_sceneGraph.erase(node);
node->setSceneGraph(GraphPtr());
}
}
} // namespace scene
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