38 lines
831 B
C++
38 lines
831 B
C++
// Copyright © 2008-2021 Pioneer Developers. See AUTHORS.txt for details
|
|
// Licensed under the terms of the GPL v3. See licenses/GPL-3.txt
|
|
|
|
#ifndef SCENEGRAPH_NODECOPYCACHE_H
|
|
#define SCENEGRAPH_NODECOPYCACHE_H
|
|
|
|
#include "RefCounted.h"
|
|
#include <map>
|
|
|
|
namespace SceneGraph {
|
|
|
|
class Node;
|
|
|
|
class NodeCopyCache {
|
|
public:
|
|
template <typename T>
|
|
T *Copy(const T *origNode)
|
|
{
|
|
const bool doCache = origNode->GetRefCount() > 1;
|
|
if (doCache) {
|
|
std::map<const Node *, Node *>::const_iterator i = m_cache.find(origNode);
|
|
if (i != m_cache.end())
|
|
return static_cast<T *>((*i).second);
|
|
}
|
|
T *newNode = new T(*origNode, this);
|
|
if (doCache)
|
|
m_cache.insert(std::make_pair(origNode, newNode));
|
|
return newNode;
|
|
}
|
|
|
|
private:
|
|
std::map<const Node *, Node *> m_cache;
|
|
};
|
|
|
|
} // namespace SceneGraph
|
|
|
|
#endif
|