利用这个插件使用边缘角度、面长度的组合来计算面的哈希值。 然后对所有面孔进行交叉检查以获得“相似”面孔选择，进行统一操作。
Select Sim is a tool for selecting “similar” faces or edges, based on hash calculation of face shape.The hash is calculated by the face “shape”. Currently Blender provides a “Select Similar” tool, access by Shift + G, to select similar faces or edges, however, it does only use single metric such as face area, diameter, or number of sides. It is hard to get desired selection.
