DS三維模型可視化平臺設計與實現

論文字數:13621,頁數:37  有開題報告，任務書

摘    要
 科學計算可視化將計算中所涉及和產生的數字信息以直觀的圖像或圖形的形式呈現在研究者面前，使他們能夠觀察到模擬和計算；同時還提供與模擬和計算的視覺交互手段。通常科學計算可視化也稱為科學可視化(Scientific Visualization)或簡稱為可視化(Visualization)。自二十世紀九十年代以來，可視化也逐漸成為了人們日常生活中的重要元素。
 首先，本文給出了可視化技術的背景及其應用領域，并從大眾需求分析了該系統的必要性，結合圖形開發包OpenGL的成熟度、3DS格式的理論性研究與客戶/服務器模型的廣泛應用得出了系統的可行性，然后通過對國內外研究狀況進行分析得出系統研究的意義。
 其次，本文給出了3DS格式的簡介，對其基本主塊、全局子塊、編輯子塊和關鍵幀塊進行了詳細說明，分析了各個塊及其子塊的邏輯結構和存儲結構；并介紹了用C++實現3DS解析程序的主要過程。
 最后，本文介紹了系統設計的客戶/服務器模型（C/S），突出其可擴展性、可維護性、結構易讀性以及模塊劃分的內聚性與封裝性。并從系統控制和業務邏輯這兩個角度對系統結構進行分析。
 創新點在于：
 (1) 提供了一個輕量級的三維模型瀏覽平臺，它實現了一些模型瀏覽的通用功能，并預制了很多用于功能擴展的插件接口；這樣，它一方面可以為三維模型的共享與檢索提供支持環境，另一方面它也提供了一個可擴展的，能夠支持多格式三維模型插件的環境；
 (2) 使得可視化技術能夠服務于低端領域，從而提高三維圖形的普及程度，甚至讓三維圖形取代二維圖形在人們日常生活中的地位；反過來，這些影響也能反作用于可視化技術，促進可視化技術的發展。
 關鍵詞：可視化；3ds格式；三維模型；系統設計
 
 
 
 
 
Abstract
 Scientific visualization can present the information to researchers with the graphic form, which makes it very explicit and provide the capacity to let the researchers observe the process of emulation. What's more, it can allow the researchers to communicate with the information visually. From 1990s to now on, Scientific Visualization is becoming a more and more important issue in the daily life.
 First, the assay expatiate the background of visualization technology and its application fields; Then we analyze the need of visualization system from the point of people’s daily requirement. And we get the feasibility of the system because OpenGL graphic development took kits is very mature, the theoretic research of 3DS file format is being run very well, and the client-server mode is being used widely when we design application based on window. Then we obtain the meanings of the job we did after we investigated the internal and external situation about how far the job is going.
 Secondly, the assay introduces the 3DS file format briefly and gives a detailed reference to the main block, the global block, the edit block and the main frame block. Then the assay presents the logical structure and gives the according storage structure for most of important blocks. At the end of this chapter, it introduces how to parse 3DS file format in C++.
 At last, the assay states the client-server mode used in system design, and concentrates on its expansibility, maintainability, structural readability and the cohesion and encapsulation for model design. Then it analyses the system structure from the angle of system control flow and system logical business flow.
 And the innovations of the assay are as following:
 (1) it provides a light-weighted platform for 3D model previewing. It implements the common function set for previewing multiple-format models, and it also preserves some plug-in interfaces for functions expansibility. Then, on the one hand it can provide environment for sharing and searching 3D models; on the other hand, it can support other 3D file formats through plug-in mechanism.
 (2 ) it applies visualization technology to low-end fields, thus can enhances the popularity of 3D graphics, even let 3D graphics instead of 2D graphics in people's daily life; thus it can promote development of visualization technology.
Key Words： Visualization； 3DS file format；3D model；System design
目       錄
摘    要 I
Abstract II
目       錄 III
第一章 引言 1
1.1課題研究的必要性 1
1.1.1 可視化技術 1
1.1.2 3DS三維模型 1
1.1.3 OpenGL圖形開發庫 1
1.2課題研究的可行性 2
1.2.1 三維繪圖標準 2
1.2.2 3DS格式理論性研究 2
1.2.3客戶/服務器模式研究 2
1.3國內外研究狀況 2
1.4 基本概念描述 3
第二章 3DS文件解析原理及其實現 5
2.1 3DS文件格式說明 5
2.1.1簡介 5
2.1.2基本主塊 5
2.1.3 全局子塊 5
2.1.4 編輯子塊 6
2.1.5關鍵幀塊 10
2.2 3DS解析實現 11
第三章 用戶交互功能的原理與實現 13
3.1 幾何變換基本原理 13
3.1.1平移變換 13
3.1.2 縮放變換 13
3.1.3 旋轉變換 14
3.2 程序實現 15
第四章 可視化系統的系統分析與實現 19
4.1系統功能描述 19
4.2軟件的系統結構分析 20
4.2.1系統的組成和結構 20
4.2.2多維體系結構設計 21
4.2.3繪圖引擎組件結構設計 22
4.2.4數據流、控制流分析與設計 23
4.2.5用戶界面設計 26
第五章 性能分析 27
5.1表面材質與環境光照模型 27
5.2模型坐標變換及法向量控制 28
總 結 29
致 謝 30
參考文獻 31
附錄 32