使用非确定性技术和球形工具获得用于加工STL表面的螺旋路径渐进成形J.L. Huertas-Talon et al. Computer-Aided Design 50(2014)41-50 Triangle i Side il, 12, 13 Triangle A Sidej1,j2, j3 Side side Ik Contour side sid∈2△→ no contour yes Store side i, as contour Fig 2. Condition of one side