NodeCopyCache.h

Go to the documentation of this file.

// Copyright © 2008-2023 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