private void PlaceMaterial(Vector2D position, string selectedLevelObject,
			int levelObjectIndex)
		{
			DrawableEntity entity;
			if (Is3D)
				entity = new MaterialLevelObject(position, selectedLevelObject);
			else
				entity = new SpriteLevelObject(position, selectedLevelObject);
			ObjectList[levelObjectIndex] = entity;
		}
        private void PlaceMaterial(Vector2D position, string selectedLevelObject,
                                   int levelObjectIndex)
        {
            DrawableEntity entity;

            if (Is3D)
            {
                entity = new MaterialLevelObject(position, selectedLevelObject);
            }
            else
            {
                entity = new SpriteLevelObject(position, selectedLevelObject);
            }
            ObjectList[levelObjectIndex] = entity;
        }