基于细分曲面的泊松网格编辑  

Poisson Mesh Editing Based on Subdivision Surface

作　　者：张湘玉[1] 廖文和[1] 刘浩[1] 

机构地区：[1]南京航空航天大学机电学院,南京210016

出　　处：《计算机辅助设计与图形学学报》2010年第1期76-84,共9页Journal of Computer-Aided Design & Computer Graphics

基　　金：国防基础科研基金

摘　　要：针对具有丰富几何细节的三维网格模型,基于直接坐标操纵的传统编辑算法在编辑过程中不可避免地存在细节特征无法得到有效保持的问题.综合基于细分曲面的空间变形方法以及微分域网格编辑二者优势,提出一种基于细分曲面的泊松网格编辑方法.首先建立待变形网格模型的包围网格,以包围网格所决定的细分曲面构造变形控制曲面;然后根据用户变形意图操纵包围网格,将对应细分曲面变化信息转化为对网格模型泊松梯度场的改变;最后根据变化后的梯度场重建网格模型.文中方法交互简单、直观,具有多分辨率编辑的优势,可以有效地保持网格模型的细节特征.丰富的变形实例证明了该方法的有效性和可行性.For 3D mesh models with abundant geometric details,traditional editing methods which manipulate vertex positions explicitly have an inevitable problem that geometric details can not be well-preserved during editing.In taking the joint advantages of subdivision-based space deformation and differential domain methods,a subdivision-based Poisson mesh editing approach is proposed.Firstly,a bounding mesh of the deformable model is constructed,and then the deformation control surface is obtained with the subdivision surface determined by the bounding mesh.Secondly,when the bounding mesh is modified according to the desired deformation result,the change information of the corresponding subdivision surface is transformed into the alteration of the mesh gradient field.At last,the deformed model is reconstructed from the gradient field newly obtained.The proposed deformation method is straightforward,and friendly in interaction.It possesses a multi-resolution property,and can be employed to preserve geometric details effectively.Rich deformation examples demonstrate the effectiveness and feasibility of the method.

关 键 词：自由变形 细分曲面 泊松网格编辑 多分辨率编辑 细节保持 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]