通过ufun函数UF_MODL_ask_face_props可以获取到面的法向数据和UV和半径等数据。

代码如下：

    double[] uvs = new double[4];double[] param = new double[2];double[] point = new double[3];double[] u1 = new double[3];double[] v1 = new double[3];double[] u2 = new double[3];double[] v2 = new double[3];double[] unit_norm = new double[3];var theUf = UFSession.GetUFSession();theUf.Modl.AskFaceUvMinmax(faceTag, uvs);param[0] = (uvs[1] + uvs[0]) / 2;param[1] = (uvs[3] + uvs[2]) / 2;theUf.Modl.AskFaceProps(faceTag, param, point, u1, v1, u2, v2, unit_norm, radii);