【正文】
s Al dermason, is a desktop VR pioneer. The pany produced a series of mercial VR software package, are called Sup erscape. Sup erscape software package is mainly posed of a graphic editor, in front of the world series 中原工學院信息商務 學院畢業(yè)設計(論文)譯文專用紙 第 11頁 Editor and visualization modules of three parts. Graphics editor used to create threedimensional objects, predefined pattern are placed on the world editor world coordinate system, visualization programs permit the user to move in the virtual world and interact with it, by space ball and mouse mands. Divi sion Ltd, founded in 1989, is located in Bristol. The pany in the development of Vision, ProVision and Supervi / sion system for modular high speed graphics engine, take the lead in using Transputer and i860 technology. The pany39。s to mid 8039。 目前 , 國內從事海域整體模擬研究的還不多。 Division Ltd ,創(chuàng)建于 1989年 , 位于布里斯托爾。例如 , VR 系統(tǒng)開發(fā)平臺、分布式 VR 技術等 , 這些都直接與計算機技術、多媒體技術的快速發(fā)展密切相關。北大西洋公約組織 (NATO)計劃把各個不同國家的兵力逐步“匯集入 SIMNET 而成為一個虛擬戰(zhàn)場” , 然后把空戰(zhàn)仿真系統(tǒng) AWSIMS (Air Warfare Simulation System ) 和海戰(zhàn)仿真 系統(tǒng) ( NWSIMS Naval Warfare Simulation System )與 SIMNET 相聯(lián)。要做到這一點 , 可以從軟件與硬件兩方面來考慮 , 在硬件體系結構方面 , DIVISO 公司在 SuperVision 系統(tǒng)中提出了一種基本的并行模型 , 開發(fā)了相關的并行處理器件和 DVS 操作系統(tǒng) , 使虛擬現實得以全面發(fā)展。這三個重要特征用以區(qū)別相鄰近的技術 , 如多媒體技術、計算機可視化技術沉浸特征 , 即在 VR 提供的虛擬世界中 , 使用戶能感覺到是真實的進入了一個客觀世界 ; 交互特征 , 要求用戶能用人類熟悉的方式對虛擬環(huán)境中的實體進行觀察和操縱 ; 構想特征 : 即“從定性和定量綜合集成環(huán)境中得到感性和理性的認識 : 從而化概念和萌發(fā)新意” 。與其他高新技術一樣 , 客觀需求是虛擬現實技術發(fā)展的動力。 VR 以模擬方式為使用者創(chuàng)造一個實時反映實體對象變化與相互作用的三維圖像世界 , 在視、聽、觸、嗅等感知行為的逼真體驗中 , 使參與者可直接探索虛擬對象在所處環(huán)境中的作用和變化 ; 仿佛置身于虛擬的 現實世界中 , 產生沉浸感 (immersive)、想象 (imaginative 和實現交互性 interactive) 。在虛擬現實系統(tǒng)中只有各種交互設備還不夠 , 還必須提供基本的軟件支撐環(huán)境 , 用戶能方便地構造虛擬環(huán)境并與虛擬環(huán)境進行高級交互。 80 年代初 , 美國的 DARPA(Defensen Advanced Research Projects Agency) 為坦克編隊作戰(zhàn)訓練開發(fā)了一個實用的虛 SIMNET。 VR 應用的關鍵是尋找合適的場合和對象 ,即如何發(fā)揮想象力和創(chuàng)造性。該公司生產了一系列的商業(yè) VR 軟件包 , 都命名為 Superscape。 對于海浪、海灘浪、碎浪等的模擬研究有些基礎 , 國外學者如 Peachey D、Alain Fournier、 WilliamT1Reeeves 、 Beesel1F 、 Lebelond , Paul H1 都有較深入研究 ; 國內浙江大學 CADamp。 interactive features, requires that the user can use human familiar way, the entity in virtual environment observation and manipulation of concept。s to 80time metaphase, begin to form the basic concept of VR, started by the experiment into the practical stage, an important sign of which is that: in 1985 Michael Mc Greevy finished under the VIEW virtual reality system, equipped with a data glove and head tracker, provides gestures, language and other means of interaction, make VIEW be be worthy of the name of the virtual reality system, later to bee the development of virtual reality system structure of other panies such as VPL have been developed for the generation of virtual reality RB2 software and Data Glove data glove, for virtual reality provides development tools. The third stage, the late 8039。 Zhejiang University State Key Laboratory of National University of Defense Technology, Beihang University, Harbin Institute of Technology, also have different degrees of. These studies are related to the sea, but the emphasis on the wave of this specific phenomenon, and not the oceans as a whole to treat, but its theory and method can be Marine 3D landscape simulation system used by. 中原工學院信息商務 學院畢業(yè)設計(論文)譯文專用紙 第 12頁 At present, domestic engaged in the whole area simulation study is not more than. Northwestern Polytechnical University College of marine engineering application of Visual C + + and Open GL in the highend PC virtual ocean environment, the system can be more realisti