可以读取stl文件中的x,y,z的极值，并以此作为其AABB(沿坐标轴方向)包围盒-Stl file in the x, y, Z extremum can be read, and as the AABB (along the axis direction) bounding box

对两个stl三角形面片格式的文件进行读取，并建立aabb包围盒，检测它们的干涉情况。-To read the two the stl triangular facets format file and create aabb bounding box to detect interference.