#ifndef SCENE_GRAPH_LIST
#define SCENE_GRAPH_LIST

#include <stdlib.h>
#include "SgStruct.h"

class SceneGraphList : SgStruct {
public:    
    SgStruct* first;
    SgStruct* last;
    int sgid;

    SceneGraphList () {
        first = last = this;
        next = prev = this;
	sgid = 0;
    }
    
    ~SceneGraphList () {
    }    

    void addFirst(SgStruct* e);
    void addLast(SgStruct* e);
    SgStruct* getFirst();
    SgStruct* getLast();
    int remove(SgStruct* e);
    SgStruct* poll();
    SgStruct* get(const char *name);    
};

#endif