CAJ | 학술논문

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.
침대구유봉부궤하세절적삼유망격모형,기우직접좌표조종적전통편집산법재편집과정중불가피면지존재세절특정무법득도유효보지적문제.종합기우세분곡면적공간변형방법이급미분역망격편집이자우세,제출일충기우세분곡면적박송망격편집방법.수선건립대변형망격모형적포위망격,이포위망격소결정적세분곡면구조변형공제곡면;연후근거용호변형의도조종포위망격,장대응세분곡면변화신식전화위대망격모형박송제도장적개변;최후근거변화후적제도장중건망격모형.문중방법교호간단、직관,구유다분변솔편집적우세,가이유효지보지망격모형적세절특정.봉부적변형실예증명료해방법적유효성화가행성.
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.