其他三维软件（如UG）建立的模型导出为STL文件，在VB 中可以利用此代码读取STL文件，利用OpenGL的glVertex3f函数还原三维模型，STL中存储的是三维模型的各三角形定点数据和法向量数据-Other 3D software (UG) export the model as an STL file, you can use this code in VB to read the STL file using OpenGL glVertex3f function to restore the three-dimensional model, STL stored in the triangle of the three-dimensional model of fixed-point data and method vector data