一种简化的三阶NFFD变形算法  

A Simplified 3rd NFFD Deformation Algorithm

作　　者：唐小凤[1] 王维[1] 李焱[1] 贺汉根[1] 

机构地区：[1]国防科技大学机电工程与自动化学院自动化研究所,湖南长沙410073

出　　处：《计算机仿真》2008年第1期176-178,183,共4页Computer Simulation

摘　　要：将基于NURBS的自由空间变形算法(NFFD)应用于工程领域的虚拟人四肢变形的过程中,为了获得变形过程中的逼真性和实时性,在原有算法的基础上,提出了一种简化的三阶NFFD变形算法。该方法从工程应用的角度出发,对控制点的设置进行了规范化,给出了参数化坐标与待变形点之间的明确关系,简化了待变形体参数化坐标的求解过程,使其可以用于虚拟人的四肢变形过程中。实验表明,这种简化算法可以提高计算效率,简化计算过程,保证虚拟人四肢变形过程中的逼真性与实时性,取得较好的变形效果。The paper realizes the skin deformation of virtual human＇ s limbs by using free form deformation on the basis of NURBS（NFFD）. For getting the realistic and real time deformation,based on NFFD method, a simplified 3rd NFFD algorithm is proposed. This method prescribes the setting of the control point, finds the connection between the parametric coordinate and the prep deformation point and simplifies the process of resolving the parametric coordinate. So it can be used for the skin deformation of the virtual human＇ s limbs. The experiment result indicates that this method can improve the efficiency, simplify the calculated process, implement the realistic and real - time virtual human＇s limbs deformation, and have a good appearance.

关 键 词：自由空间变形 虚拟人 皮肤变形 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置]