During end 2004, I developed the engine basics: the renderer, the scene-graph, the plugins system, etc.. and I continued to experiment various prototypes ( such as the clouds prototype ).

• 在2004年末的时候，我开发了引擎基础：列表、背景图示、嵌入式系统等......并且继续测试多种原型（例如云层的原型）。