D:/guillaume/guillara/3D/DXGfx/DXGfxLib/RessourceManager.cs

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using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;

namespace DXGfxLib
{
    public class RessourceManager
    {
        protected static RessourceManager globalInstance = null;

        Hashtable loadedMeshRessources = null;

        public RessourceManager()
        {
            if (globalInstance != null)
            {
                throw new Exception("This is wrong only one instance of the RessourceManager can be created per process and there is already one!");
            }
            loadedMeshRessources = new Hashtable();
            globalInstance = this;
        }

        public RessourceManager GetGlobalInstance()
        {
            if (globalInstance == null)
            {
                throw new NullReferenceException("There is no instance of RessourceManager class in this AppDomain. It is wrong to call this method now!");
            }
            return globalInstance;
        }
        
        public MeshRessource GetMeshRessource(string filename)
        {
            MeshRessource preloaded = loadedMeshRessources[filename] as MeshRessource;

            if (preloaded == null)
            {
                preloaded = new MeshRessource(filename);
            }

            return preloaded;
        }
    }
}

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