/// <summary>
/// 获取面上的点
/// </summary>
/// <param name="face"></param>
/// <returns></returns>
private static Point3d GetFacePoint(Face face)
{
UFSession theUFSession = UFSession.GetUFSession();
int statusPt;
double[] point;
FaceData data = FaceUtils.AskFaceData(face);
point = new double[3] {
data.Point.X, data.Point.Y, data.Point.Z
};
theUFSession.Modl.AskPointContainment(point, face.Tag, out statusPt);
if (statusPt == 1)
{
return(data.Point);
}
else
{
double[] uvs = new double[4];
theUFSession.Modl.AskFaceUvMinmax(face.Tag, uvs); //获得面u,v参数空间（u,v最小,最大值）
double[] param = new double[2]; //输入U,V方向值
for (int i = 1; i < 6; i++)
{
param[0] = i * (uvs[1] - uvs[0]) / 5 + uvs[0];
param[1] = i * (uvs[3] - uvs[2]) / 5 + uvs[2];
double[] point1 = new double[3]; //输出点坐标
double[] u1 = new double[3]; //输出 输出一阶导数在U位置
double[] v1 = new double[3]; //输出 输出一阶导数在V位置
double[] u2 = new double[3]; //输出 输出二阶导数在U位置
double[] v2 = new double[3]; //输出 输出二阶导数在V位置
double[] unit_norm = new double[3]; //输出面上该点的矢量方向
double[] radii = new double[2]; //输出，双半径，输出主曲率半径
theUFSession.Modl.AskFaceProps(face.Tag, param, point1, u1, v1, u2, v2, unit_norm, radii);
theUFSession.Modl.AskPointContainment(point1, face.Tag, out statusPt);
if (statusPt == 1)
{
return(new Point3d(point1[0], point1[1], point1[2]));
}
}
}
return(new Point3d());
}
