本論文主要是以立體裁剪的服裝設計方法為架構，發展互動式布料動態模擬之研究。主要以彈簧的物理模型來描述布料質點之間的受力變化情形，其中包括了布料質點與質點之間的伸縮力、相鄰兩質點連線的剪力、網格面與面之間的彎曲力等三種受力計算。除了考慮布料本身內部受力情形之外，並加入布料質點所受重力的計算，以模擬布料垂墜特性的動態效果。接著考慮布料與物體(幾何物體或人台模型)的碰撞受力問題，同時計算布料與碰撞物體平面間的摩擦力。有了以上的受力模型之後，接著經由尤拉法的數值方法計算出布料質點受力後的位置變化，最後呈現出布料動態模擬的效果。
　　為了讓布料動態模擬的電腦運算更具即時互動性，加入了選取、移動、固定布料質點等功能，並以彈簧受力的物理模型計算布料質點縫合的受力變化情形，讓整個研究更趨完整。最後，針對本研究的電腦動態模擬效能進行評估，結果得到不錯的計算效能。
　　在未來的研究發展上除了可針對數值解法、碰撞偵測方法與互動式布料動態模擬功能進行更深入的研究，尚可在介面操作上進行使用性工程評估，讓布料動態模擬電腦運算技術更加成熟。另外也可以應用在產品造型設計、人體腹腔內部虛擬實境動態模擬，服裝模特兒動態走秀等研究上。

　　The objective of this paper is to study the interactive dynamic simulation of cloth and to develop a computer simulation system using clothing design methods of draping. The internal force variation between particles of a cloth mesh is mainly described by a physical-based model of spring, including stretch force (compression and elongation) between particles of cloth mesh, shear force between two consecutive line segments, and bending force between polygons of the mesh. The gravity is added to all the particles of the mesh as the external force. The internal and external forces are combined together to simulate the dynamic effect of cloth draping.

　The collision and friction force between the particles of the cloth mesh and an object (arbitrary geometric object or human body model) are computed. Euler method is applied to determine the displacement of all particles after considering the effect by the combination of all forces, including internal, external, friction and collision forces. Finally the dynamic simulation of cloth is presented. In order to simulate of motion of the cloth mesh dynamically, several interactive functions such as particle selection, particle movement, and particle fixation are implemented to enhance the capacity of the human-machine interface of the system. Virtual springs are added between two particles to simulate the knitting process of tailors or dressmakers to make the system more realistic to mimic the operation of the clothing design methods of draping.
　Eventually, a dynamic simulation of cloth is successfully implemented and proved to be very efficient. In the future, the research work can be focused on the improvements of numerical methods, collision detection algorithm and the interactive functions of the dynamic simulation system. Furthermore, the usability of the interface can be taken into account to make the system more user-friendly and easy to use. The dynamic simulation technique can also be applied in the fields of product design, virtual reality animation of laparoscopic surgical training systems, and the walking simulation of a computer human model, etc.

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