public SectorGeometryList tessellate(DrawContext dc)
        {
            if (_tessellator == null)
            {
                _tessellator = (Tessellator)WorldWind.createConfigurationComponent(AVKey.TESSELLATOR_CLASS_NAME);

                if (_tessellator == null)
                {
                    string message = Logging.getMessage("Tessellator.TessellatorUnavailable");
                    Logging.logger().severe(message);
                    throw new IllegalStateException(message);
                }
            }

            return(_tessellator.tessellate(dc));
        }