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研究生:王清鋒
研究生(外文):Wang Ching Feng
論文名稱:以虛擬手套進行自由曲面實體之變形操作
論文名稱(外文):Manipulation of Deformation for Freeform Surfaced Solid using Virtual Glove
指導教授:莊勝雄莊勝雄引用關係
指導教授(外文):Chuang S. H.
學位類別:碩士
校院名稱:國立中興大學
系所名稱:機械工程學系
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:55
中文關鍵詞:自由曲面實體B-spline曲面虛擬實境資料手套幾何變形特徵設計操作
外文關鍵詞:freeform surfaced solidB-spline surfacevirtual realitydata glovegeometric deformationfeature designmanipulation
相關次數:
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本文之目的在發展以手指運動操作資料手套來移動曲面控制點進而控制實體之變形的方法。本文中的實體表面是由B-spline自由曲面黏合而成。依此方法,使用者可以很容易做曲面實體的形狀變化,達到電腦造型的目的。
曲面實體表面是以雙三次B-spline曲面構成,相鄰曲面間以黏合方式構成拓樸上封閉表面的實體。透過介面經由滑鼠的按鍵來選擇曲面實體上的曲面及控制點,以單手五手指分別可操作曲面實體上的五個控制量,由手指的彎曲變化量,來產生控制點之參數量變化。
其操作可為單點、局部、線段、周圍及全曲面等操作。單點操作以選取曲面實體上的控制點作法線方向的位移變形;局部操作採以範圍控制法,其所變形的區域為一群控制點之影響範圍;線段操作由選取的整排控制點作位移或彎曲動作;周圍操作由選取的整圈控制點作位移或縮放的變形操作;而全曲面操作主要以姆指及食指分別控制兩個曲面所有的控制點,產生壓縮及伸長的變形。經由上述之各種變形操作,另可透過傾斜感測器控制曲面實體的旋轉。如此可透過手部姿勢的變化,可以模擬人體之手彎曲握捏實際物理實體的變形動作,以進行資料手套操控之雕塑幾何造型。
The purpose of this thesis is to develop a method, which uses a data glove to move control points of surfaces through bendings of fingers and control the deformation of freeform surfaced solid. The surface of the solid is constructed by joining B-spline freeform surfaces. In such a way, a system for friendly computer modeling is constructed and users can easily change the shape of the freeform surfaced solid.
The surface of the solid is composed of bicubic B-spline surfaces, of which adjacent surfaces are glued to form surface closed solid topologically. Using a mouse to choose surfaces and control points of the freeform surfaced solid, five fingers individually manipulate five controlled quantities on freeform surfaced solid through bendings of fingers. It is the bending of a finger which changes a corresponding parameter of the control points of a surfaced solid.
Five types operators are proposed for manipulating the deformation of a solid, they are single point, region, line, periphery, and global operator. The single point manipulation is to select individual control point of freeform surfaced solid to move along normal direction by a finger bending. The region manipulation uses the method of range control, a group control points in a region are selected to move all together. The line manipulation chooses the control points of a line to be moved in a distance. The periphery manipulation chooses the control points in circles to move distances for deformation. The global manipulation chooses the thumb and the index finger to control all of control points on two surfaces, and produces the deformation either compressed or stretched. Besides the manipulation of deformation using finger bending, tilt sensor is used to control the rotation of a freeform surfaced solid.
Consequently, using a data glove through bendings of fingers, it simulates a hand to grasp and act on a deformable solid, in order to deform a freeform surfaced model.
中文摘要------------------------------------------------------------I
英文摘要-----------------------------------------------------------II
第一章 介紹---------------------------------------------------------1
1.1 研究背景------------------------------------------------------1
1.2 研究目的與方法------------------------------------------------1
1.3 文獻回顧及探討------------------------------------------------2
1.4 內容大綱------------------------------------------------------5
第二章 曲面實體的表示法---------------------------------------------6
2.1 B-Spline曲面的定義--------------------------------------------6
2.2 B-Spline曲面的轉換--------------------------------------------8
2.3 曲面實體的定義------------------------------------------------9
第三章 虛擬手套架構及曲面實體之結構--------------------------------13
3.1 虛擬手套介紹-------------------------------------------------13
3.2 虛擬手套設備之測試-------------------------------------------15
3.3 曲面實體的資料結構-------------------------------------------16
3.4 虛擬手套與曲面實體整合---------------------------------------17
第四章 曲面實體之變形操作法----------------------------------------19
4.1 單點變形操作-------------------------------------------------21
4.2 局部變形操作-------------------------------------------------23
4.3線段變形操作-------------------------------------------------27
4.3.1 以位移變形操作-------------------------------------------27
4.3.2 以彎曲變形操作-------------------------------------------28
4.4 周圍變形操作-------------------------------------------------30
4.4.1以位移變形操作-------------------------------------------30
4.4.2以周圍比例縮放變形操作-----------------------------------31
4.5 全曲面變形操作-----------------------------------------------33
第五章 曲面實體變形之實施----------------------------------------35
5.1系統架構-----------------------------------------------------35
5.2操作範例-----------------------------------------------------37
5.3結果討論-----------------------------------------------------50
第六章 結論與展望--------------------------------------------------51
6.1 結論---------------------------------------------------------51
6.2 未來展望-----------------------------------------------------52
參考文獻-----------------------------------------------------------53
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