Skinning in character animation based on implicit surface

doi:10.3969/j.issn.1000-5641.2024.02.015

Abstract

Abstract:

This paper presents a method for skinning in character animation, utilizing implicit surfaces, which is designed to deform animated models with skeleton and associated skinning weights．This method reconstructs the mesh around a given skeleton with the Hermite radial basis function and Poisson-disk sampling on surfaces．This process transforms the character’s volume into a set of localized 3D scalar fields and preserves the original mesh properties．Field functions are then constructed and employed to refine the results obtained from the geometric skinning technique．The implicit method, combined with two types of combination operators, generates realistic skin deformations around the human skeleton model finally．The method does not cause candy twist and joint swelling problems, and can handle skin collision and muscle protrusions．Due to its post-processing feature, this method is very suitable for animation generation in standard production pipeline．

Key words: implicit method, skinning, Hermite radial basis function, Poisson-disk sampling, field function

CLC Number:

TP391

Sijing RAO, Ying XIN, Junjun PAN. Skinning in character animation based on implicit surface[J]. Journal of East China Normal University(Natural Science), 2024, 2024(2): 143-156.

Figures/Tables 12

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References 30

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模型	顶点数	三角面片数	骨骼数	HRBF占用内存/MB
Dana	4200	8300	67	32.6
手部	31800	62900	21	10.3

模型	运行时间/ms
模型	LBS	DQS	本文所提出的方法
Dana	0.86	3.21	4.95
手部	6.55	20.5	33.29

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