臺灣博碩士論文加值系統

以3D動畫的方式來表現電影或影片特效變得越來越普遍。電影場景中因應劇情的需要，常常加入群體的場景，而群體的數量和呈現效果，是可以隨意發揮而沒有任何限制的。但在群體的場景中若仍由真人(或動物)上陣，因應龐大場面及效果的需要，勢必耗費大量的演員投入及昂貴的經費支出；而由3D動畫製作成的場景，雖然關鍵影格〈keyframe）動作的調整已可非常的細膩，但是使用影格調整來製作大量的動畫角色，需要消耗龐大的人力資源，顯得很沒有效率。所以，透過3D電腦動畫的群體運動，已成為電腦特效的另一項重要技術及技能。

本研究使用MAYA的MEL技術來複製動態物件以及控制群體運動，可以調整群體個體的數量，以及不同的運動方式。在影片中有五項研究成果，第一，產生大量的球，且以不同速率彈跳；第二，整齊陣列隊形往同一方向前進；第三，不同速率的人物，同方向直線向前走；第四，平面隨機位置產生貓熊；第五，蝴蝶在曲面上產生，隨意飛舞且不互相碰撞。並將程式碼介面化，幫助動畫師更加方便的操作及運用。

Using 3D animation to create special effects becomes more and more popular in movie industry. If necessary, crowd motion scenes are quite often added into film to create an impressed effect. And the crowd motion units and arrangements are no limits and free for designer’s imagination. Nowadays there are some crowd motion scenes performed by real actors/animals which not only spend a lot of time and energy but also cost them much money on it. Another choice of 3D crowd motion technology, although its key frame being adjusted into very delicate action, is still inefficient and consumed huge human resources when using key frame to produce a large number of animation characters. So, the selection of 3D animation in crowd motion has become another important technology and skill.

This study is focusing on duplication of the dynamic object and control of crowd motion with Maya MEL script by adjusting quantities of crowd/individual and different ways of movement. There are five study results in this paper made by MEL script. First, a large amount of ball bouncing at different rates; second, people in parade formation and moving forward in the same direction; third, people moving ahead in the same direction with different forward rates; fourth, randomly generating pandas on a plane surface; fifth, the butterflies flying randomly on the curved surface and free from colliding one another. Finally, this study has made MEL script into control interface. It may help animators have a better experience in operation and its further application.

中文摘要...........................................i
Abstract..........................................ii
目錄.............................................iii
表目錄.............................................v
圖目錄............................................vi
第一章、緒論.......................................1
第一節 研究背景....................................1
第二節 研究動機與目的..............................2
第二章、文獻探討...................................3
第一節 Maya內建語言MEL Script......................3
第二節 群體運動動畫概述............................5
第三節 群體運動相關電影及影片......................7
第四節 群體運動及MayaMEL Script相關應用...........11
2.1.1 Maya 表達式（Expression）之應用.............11
2.1.2 Maya MEL與介面（windows）之應用.............13
2.1.3 Maya MEL曲面產生物件之應用..................14
第三章、研究方法及流程............................15
第四章、研究結果..................................17
第一節 群體運動MEL技術與動畫結合..................17
4.1.1 複製物件....................................17
4.1.2 改變方向及位置..............................18
4.1.3 碰撞偵測....................................20
第二節 產生大量的球，且以不同速率彈跳.............23
4.2.1 Script Editor執行...........................25
4.2.2 使用者介面介紹..............................25
4.2.3 使用者介面程式..............................27
第三節 整齊陣列隊形往同一方向.....................27
4.3.1 Script Editor執行...........................30
4.3.2 使用者介面介紹..............................30
4.3.3 使用者介面程式..............................32
第四節 不同速率的人物，同方向直線向前走...........33
4.4.1 Script Editor與Expression執行...............34
4.4.2 使用者介面介紹..............................36
4.4.3 使用者介面程式..............................36
第五節 曲面或平面上產生物件.......................38
4.5.1 Script Editor執行...........................40
4.5.2 使用者介面介紹..............................41
4.5.3 使用者介面程式..............................44
第六節 蝴蝶在曲面上產生，隨意飛舞且不互相碰撞....47
4.6.1 Script Editor執行...........................49
4.6.2 使用者介面介紹..............................51
4.6.3 使用者介面程式..............................54
第五章、結論......................................57
參考文獻..........................................58

[1] Brogan,D. and Hodgins,J.(1997). ” Group Behaviours for Systems with Significant Dynamics,” Autonomous Robots, 4 , pp:137-153.
[2] David Stripinis (2003). The MEL Companion: Maya Scripting for 3D Artists
[3] Hery,C. and Ono,H. and Sutton,D.(2004). ”Crowd Systems at ILM,” SIGGRAPH 2004 Course .Note 33, pp: 81-100.
[4] Li,T.Y.,Jeng,Y.J., and Chang,S.I.(2001). ”Simulating Virtual Human Crowds with a Leader-Follower Model,” Proceedings of the 2001 Computer Animation Conference, Korea.
[5] Kerlow,I.V. (2009). The Art of 3D Computer Animation and Effects. 4th Revised &; enlarged
[6] Mankyu Sung, Michael Gleicher and Stephen Chenney (2004). Scalable behaviors for crowd simulation. SIBGRAPI &;apos;&;apos;13 Proceedings of the 2013 XXVI Conference on Graphics, Patterns and Images. Pages 31-38
[7] Peng Zhang, Hong Liu, Yan-hui Ding (2013). Crowd simulation based on constrained and controlled group formation
[8] Ramakrishnan Mukundan, Bo Li. (2012).Crowd Simulation: Extended Oriented Bounding Boxes for Geometry and Motion Representation. IVCNZ &;apos;&;apos;12, November 26 - 28
[9] Reynolds C.W. (1987). Flocks, Herds, and Schools: A Distributed Behavioral Model. Proceedings of ACM SIGGRAPH’87,(pp.25-34.)
[10] Sergio Ruiz , Benjam´ın Hern´andez , Adriana Alvarado , Isaac Rudom´ın (2013). Reducing Memory Requirements for Diverse Animated Crowds. ACM SIGGRAPH Symposium on Computer Animation
[11] Yi Li, Marc Christie, Orianne Siret,Richard Kulpa , Julien Pettré1(2012). Cloning Crowd Motions. ACM SIGGRAPH Symposium on Computer Animation
[12] 林珮淳, 陳啟耀. (2003). 3D 電腦動畫技術、視覺語言與特質之探討
[13] 廖志楷. (1999). 3D 動畫群體模擬的控制方法研究-技術回顧
[14] 郭俊傑. (2011). 「心鎖」動畫創作論述暨3D電腦動畫燈光全局照明之應用. (碩士), 國立國立臺中科技大學
[15] 廖幸美. (2012). 數位剪紙動畫《阿爸的天空》創作論述暨拼貼與蒙太奇之應用探討. (碩士), 國立國立臺中科技大學
[16] 蔡秀英. (2011). 縮放縫接動畫《神話》創作論述暨視覺錯覺之應用探討. (碩士), 國立國立臺中科技大學
[17] 江宗育. (2011). 電腦動畫《雲端快遞》與非寫實質感渲染之應用. (碩士), 國立國立臺中科技大學
[18] 黃建豪. (2011). 「藍天」動畫創作論述暨救難類型媒體創作分析. (碩士), 國立國立臺中科技大學
[19] Autodesk Software, Inc. http://usa.autodesk.com/
[20] Autodesk Maya commands官方網站- 2014 MEL Script API http://download.autodesk.com/global/docs/maya2014/zh_cn/Commands/index.html