面向快速成型的CAD三角网格模型局部细分技术研究
A partial subdivision approach of triangular meshes of CAD model for rapid prototyping

为解决快速成型应用中STL模型的表面光滑度与数据量之间的矛盾，提出一种基于边界控制的网格模型局部细分方法. 分析STL模型的边界特点，将边界特征点作为型值点构建三次B样条插值曲线求解细分点；创建边界三角形的细分模式实现三角网格模型局部区域的细分，消除边界线细分过程的收缩现象. 试验表明了该方法的有效性.
To solve the contradiction between improvement of surface smoothness and decrease of data amount of STL meshes in rapid prototyping，a partial subdivision approach based on edge control was proposed. By analyzing the edge characteristics of STL meshes，the new subdivision vertices for the edge were figured out through the uniform cubic B-spline interpolation curve constructed by the feature points of the edge. A new subdivision scheme for the boundary triangles was created to subdivide the partial region of the model without contraction of the edge. Experiments declare effectiveness of the method