以3D視覺技術來表現3D景觀或物體會比2D的展示方式提供更真實的外觀，也更能讓使用者依需要即時調整適合的觀察點。建立一個虛擬環境需要載入地形、建築物、車輛、及樹林等模型，而且還需要調整這些模型呈現適當的位置、方向、及大小。當虛擬環境中包含了大量模型時，環境及模型資料的表示將會變得異常複雜。因此複雜環境的格式及表示就需要適當的規劃及處理。 在本論文的研究中，我們提出了一套符合SEDRIS格式與規範的虛擬環境編輯系統，其中包含了容易操作的幾何轉換、使用者界面、多重解析度地形展示、道路系統編輯器、碰撞偵測、和屬性建立與查詢等功能。SEDRIS對於資料描述模式的規範，主要是利用軟體工程的技術來清楚地描述、定義類似於真實環境中的物件。我們將利用這項物件描述技術來建構及儲存3D虛擬環境，以提供完整的物件屬性及資料建制與查詢，並為3D模型資料格式不一致而使得模型資料不能共享的問題，提供一個解決之道。 Presenting objects and virtual environment in 3D style is more realistic than in 2D style and users can adjust a suitable viewing position in real-time. To build a virtual environment need to load terrain, buildings, cars, plants, etc., and tune them with proper position, direction, and scale. If there are considerable models in the virtual environment, it will be extraordinary complex to display the environment and models. Thus we need complicated representation and specification to describe the whole virtual environment. In this study, we purpose a virtual environment editing system based on synthetic environment data representation and interchange specification (SEDRIS). The proposed system provides a friendly user interface, environment editing, level-of-detail modeling, roadmap generation, function of collision detection, and model attribute query. The data specification of SEDRIS is a software engineering technique for unambiguously articulating information about the data as the real world. We utilize the technique to unambiguously represent 3D objects and their attributes to achieve a virtual environment construction; moreover, the data representation provides a possible solution to overcome the problem of converting models with different model formats.
