基於力回饋搖桿之虛擬毛筆書寫系統

Abstract

由於電腦功能日益強大與繪圖軟體的快速發展，人們開始使用電腦作為繪圖或藝術創作的工具，目前的電腦的輸入方式主要是藉由鍵盤與滑鼠或是數位筆與繪圖板的搭配，但這些工具的操作方式與毛筆或水彩筆的差距相當大，這對使用者來說是一個很大的障礙。因此本論文建構了一個結合虛擬實境的毛筆字書寫系統，並且以六個自由度的力回饋搖桿作為輸入裝置，此系統提供了使用者視覺與觸覺的回饋，讓使用者身歷其境地操作虛擬毛筆；本文著重於毛筆模型的設計，結合幾何與物理模型演算法模擬毛筆刷毛的形變；我們以實驗驗證此系統，並與毛筆以及繪圖板系統進行比較，實驗結果顯示本系統比手寫板系統較好且更接近真實的毛筆，印證虛擬毛筆書寫系統的優異性。

Due to fast development of computer and painting software, artists nowadays are using computer to paint or create artistic production. At present, the major input devices for these systems are mouse, keyboard, and graphics tablet. However these devices are not like the traditional brushes, such as calligraphy brush or watercolor brush. In this thesis, we intend to develop a calligraphy writing system based on utilizing the virtual reality technology. A 6-DOF force-reflection joystick is adopted in our system. This calligraphy writing system provides both visual and haptic feedbacks, so that the user may immerse into the virtual writing environment. We focus on the virtual brush model, and apply both the geometric- and physical-based deformation techniques to simulate the deformation of the brush. In experiments, we compare our system with both Calligraphy brush and also graphics tablet. The results show that our system is better than the graphics tablet and quite resembles the calligraphy brush, indicating a successful implementation of a calligraphy writing system.