本文将力反馈技术引入虚拟绘制过程,提出一种基于力反馈技术的笔道仿真方法.首先通过分析力对毛笔变形的影响机理,采用弹簧-振子模型构建了一种新的毛笔力反馈仿真模型;然后通过计算毛笔模型变形时每个采样点处的笔触形状,得到笔触变化的时间序列,获得完整的笔道,实现力对笔道的动态控制.文中利用Phantom Desktop力反馈设备,成功地实现了具有力觉反馈的笔道仿真.仿真结果表明,该方法再现了传统笔道绘制中通过力触觉控制绘制的过程,有效地增强了虚拟绘制过程的真实感.%In this paper, a novel method of brush stroke simulation is proposed by introducing force feedback technology into virtual painting processes. A new brush model based on mass-spring model is constructed by analyzing the relationship between force and brush deformation, which can realistically simulate the mor-phological changes of real brush subjected to force. According to the deformation at each sampling point, the footprint of the brush on the rice paper is calculated. The complete brush stroke is implemented by super-imposing footprint series along the sampling points, and the dynamic painting of brush stroke is accom-plished. The proposed method is applied to simulate brush stroke using Phantom Desktop. Experiment re-sults show that the proposed method can enhance user realistic experience effectively.
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