敦煌285窟多媒体集成虚拟展示

敦煌石窟是我国乃至世界佛教艺术的瑰宝，建于西魏的285窟以壁画保存完整，内容丰富而成为敦煌石窟的精品之一．使用虚拟展示技术可以极大地方便人们对敦煌壁画艺术的欣赏，但是对于285窟壁画上丰富的佛教故事无法充分的表达．提出了285窟多媒体集成虚拟展示，对285窟的三维模型进行多媒体嵌入支持扩展，通过在3DS文件中增加多媒体信息结点，将三维模型与多媒体数据库进行有机整合；对热点区域建立基于对象而非基于面片的热点定义，有效地避免了在使用LOD方法中热点随面片简缩而消失的问题；在实时交互中将多媒体播放嵌入到虚拟场景中，增强了多媒体和虚拟环境的融合程度．通过多媒体集成虚拟展示，丰富了285窟的表现形式，展现能力得到了增强，取得了较好的效果．文中对285窟的建模技术以及系统中采用的实时绘制技术和真实感绘制技术做了介绍．

Dunhuang 285 Cave Multimedia Integrated Virtual Exhibit

Dunhuang cave is a precious heritage of the world Cave285 was constructed about 1400 years ago Because the fresco is protected well and there are lots of stories in the fresco, Cave285 is one of the most precious cave in Dunhuang It is convenient to people to enjoy Dunhuang fresco using virtual reality technology, but it is not enough to explain the abundant connotation of the fresco in Cave285 This paper proposes the multimedia integrated virtual exhibit of Dunhuang Cave285 The 3D model of Cave285 is extended by adding multimedia nodes into 3DS file, and this can combine 3D model and multimedia database well It is useful to define hotspot based on object , not on triangles This can solve the problem aroused by LOD, which may delete the hotspot as the triangles are undergoing data reduction Multimedia information presentation embedded in virtual environment works well in our system This paper also introduces the 3D modeling technology of the Cave285, and also introduces the real-time rendering and reality rendering technology in our system