基于中国书法的虚拟毛笔模型

A Chinese Brush Model with Calligraphy

文中提出一个基于书法的虚拟毛笔模型。该模型的主要优点在于使用基于物理的建模方法来描述真实毛笔在实际书写过程中由于毛笔内部力和外部力的影响产生的毛笔变形。通常采用的基于物理的模拟方法是通过模拟每一根笔毛的变形进而模拟整支毛笔的整体变形,而该模型使用了基于毛笔和纸张交互产生的印痕来模拟毛笔变形,这种方法可以大大降低传统的基于毛发模拟方法产生的计算复杂性。同时,为了精确地计算毛笔的变形参数,使用了一组弹簧网络,能根据施加于毛笔上的力来计算毛笔的弹性变形。仿真结果表明,虚拟毛笔可以高效地实时操作,并得到可与真实毛笔笔迹媲美的效果。

This paper presents a novel physically-based model for virtual Chinese brush. Compared with previous work, the main advantage of our method lies in the use of physically based modeling methods that describe the behavior of the real brush＇s deformation in terms of the interaction of the external and internal forces with the virtual writing paper. Instead of simulating the brush using bristles, we use points to simulate the whole brush bundle~ thus, we can drastically decrease the complexity inherent in the conventional bristle-level approach. A spring network is derived to calculate the physical deflection of brush according to the force exerted on it. With this model, we can get a more effective simulation of real brush painting.