自动刻字功能是建模过程中必须用到的，但是网上没有找到完整的刻字功能实现，所以我花了一些时间写了一套简易程序，希望能给初学者带来一点帮助

目前成都创新互联已为超过千家的企业提供了网站建设、域名、网站空间、绵阳服务器托管、企业网站设计、乌翠网站维护等服务，公司将坚持客户导向、应用为本的策略，正道将秉承"和谐、参与、激情"的文化，与客户和合作伙伴齐心协力一起成长，共同发展。

先介绍一下建模环境下刻字功能的实现，分三步走（本节主要介绍打印文本）：

第一步：打印文本

第二步：拉伸

第三步：布尔求差

///
/// 创建文本
        ///
////////////public static string TextBuilderByPoint(Point3d p, Tag faceTag , string content)
        {
            Session theSession = Session.GetSession();
            Part workPart = theSession.Parts.Work;
            Part displayPart = theSession.Parts.Display;
            theUFSession = UFSession.GetUFSession();

            int type;
            double[] point = new double[3];  //面的中心点
            double[] dir = new double[3];    //面的法向量
            double[] box = new double[6]; ;
            double radius;
            double rad_data;
            int norm_dir;
            theUFSession.Modl.AskFaceData(faceTag, out type, point, dir, box, out radius, out rad_data, out norm_dir);

            NXOpen.Features.Text nullFeatures_Text = null;
            NXOpen.Features.TextBuilder textBuilder1;
            textBuilder1 = workPart.Features.CreateTextBuilder(nullFeatures_Text);
            Point3d origin1 = new Point3d(0.0, 0.0, 0.0);
            Vector3d normal1 = new Vector3d(0.0, 0.0, 1.0);
            Plane plane1;
            plane1 = workPart.Planes.CreatePlane(origin1, normal1, NXOpen.SmartObject.UpdateOption.WithinModeling);
            textBuilder1.SectionPlane = plane1;
            Unit unit1;
            unit1 = textBuilder1.PlanarFrame.Length.Units;

            textBuilder1.FrameOnPath.AnchorPosition.Expression.RightHandSide = "50";
            textBuilder1.Type = NXOpen.Features.TextBuilder.Types.OnFace;
            textBuilder1.Script = NXOpen.Features.TextBuilder.ScriptOptions.Western;
            textBuilder1.PlanarFrame.AnchorLocation = NXOpen.GeometricUtilities.RectangularFrameBuilder.AnchorLocationType.BottomCenter;
            textBuilder1.PlanarFrame.Length.RightHandSide = "22.169352775646";
            textBuilder1.PlanarFrame.Height.RightHandSide = "10";  //标记高度
            textBuilder1.PlanarFrame.Shear.RightHandSide = "0";
            textBuilder1.OnFacePlacementMethod = NXOpen.Features.TextBuilder.OnFacePlacementMethodOptions.SectionPlane;
            textBuilder1.FrameOnPath.AnchorPosition.Expression.RightHandSide = "50";
            textBuilder1.FrameOnPath.Offset.RightHandSide = "20";
            textBuilder1.FrameOnPath.Length.RightHandSide = "30";  //标记长度
            textBuilder1.FrameOnPath.Height.RightHandSide = "10";
            textBuilder1.FrameOnPath.WScale = 99.9999999999998;
            textBuilder1.SelectFont("Arial", NXOpen.Features.TextBuilder.ScriptOptions.Western);
            //textBuilder1.TextString = DateTime.Now.ToString("yyyy-MM-dd") ;
            textBuilder1.TextString = textBuilder1.Tag.ToString();
            textBuilder1.Type = NXOpen.Features.TextBuilder.Types.Planar;
            textBuilder1.PlanarFrame.Length.RightHandSide = "22.1693527756459";

            //通过创建智能点，确保刻字在面上
            Scalar scalar1;
            scalar1 = workPart.Scalars.CreateScalar(0.5, NXOpen.Scalar.DimensionalityType.None, NXOpen.SmartObject.UpdateOption.WithinModeling);
            Scalar scalar2;
            scalar2 = workPart.Scalars.CreateScalar(0.5, NXOpen.Scalar.DimensionalityType.None, NXOpen.SmartObject.UpdateOption.WithinModeling);
            Face face1 = (Face)NXOpen.Utilities.NXObjectManager.Get(faceTag);
            Point point1;
            point1 = workPart.Points.CreatePoint(face1, scalar1, scalar2, NXOpen.SmartObject.UpdateOption.WithinModeling);
            NXObject nXObject1;
            Xform xform1;
            xform1 = workPart.Xforms.CreateExtractXform(face1, NXOpen.SmartObject.UpdateOption.WithinModeling, false, out nXObject1);
            Point3d point2 = new Point3d(p.X, p.Y, p.Z);
            textBuilder1.PlanarFrame.AnchorLocator.SetValue(point1, workPart.ModelingViews.WorkView, point2);

            //显示智能点的位置
            //Tag point11;
            //double[] Vertex1 = new double[3] { point1.Coordinates.X, point1.Coordinates.Y, point1.Coordinates.Z };
            //theUFSession.Curve.CreatePoint(Vertex1, out point11);

            //更新笛卡尔坐标系，摆正刻字
            CartesianCoordinateSystem cartesianCoordinateSystem1 = (CartesianCoordinateSystem)workPart.FindObject("ENTITY 45 1");
            cartesianCoordinateSystem1.RemoveParameters();
            Point3d origin2 = new Point3d(p.X, p.Y, p.Z);
            cartesianCoordinateSystem1.Origin = origin2;
            Vector3d xDirection1 = new Vector3d(1, 0, 0);
            Vector3d yDirection1 = new Vector3d(0, 1, 0);
            if (dir[2] == 1)
            {
                xDirection1 = new Vector3d(1, 0, 0);
                yDirection1 = new Vector3d(0, 1, 0);
            }
            else if (dir[2] == -1)
            {
                xDirection1 = new Vector3d(1, 0, 0);
                yDirection1 = new Vector3d(0, -1, 0);
            }
            else if (dir[1] == 1)
            {
                xDirection1 = new Vector3d(-1, 0, -0);
                yDirection1 = new Vector3d(-0, -0, 1);
            }
            else if (dir[1] == -1)
            {
                xDirection1 = new Vector3d(1, 0, 0);
                yDirection1 = new Vector3d(0, 0, 1);
            }
            else if (dir[0] == 1)
            {
                xDirection1 = new Vector3d(-0.0, 1.0, -0.0);
                yDirection1 = new Vector3d(-0.0, -0.0, 1.0);
            }
            else if (dir[0] == -1)
            {
                xDirection1 = new Vector3d(0.0, -1.0, 0.0);
                yDirection1 = new Vector3d(-0.0, -0.0, 1.0);
            }
            cartesianCoordinateSystem1.SetDirections(xDirection1, yDirection1);
            textBuilder1.PlanarFrame.UpdateOnCoordinateSystem();

            //显示笛卡尔坐标系
            //cartesianCoordinateSystem1.SetVisibility(SmartObject.VisibilityOption.Visible);

            ListfeaList = new List();
            feaList = GetFeatureList();

            NXObject nXObject2;
            nXObject2 = textBuilder1.Commit();

            textBuilder1.Destroy();

            foreach (Feature fea in workPart.Features)
            {
                if (!feaList.Contains(fea))
                {
                    Extrude(fea.JournalIdentifier,dir);//执行拉伸命令
                    return fea.JournalIdentifier;
                }
            }

            return "";
        }

打印文本的源码是经过录制修改而来，所以有部分源码我也还没完全整明白；

主要实现了NXOpen.Features.TextBuilder这个类来完成文本打印。

其中，需要注意的地方有：

1、要确保文本打印在面上，这里实现了一个智能点

point1 = workPart.Points.CreatePoint(face1, scalar1, scalar2, NXOpen.SmartObject.UpdateOption.WithinModeling);

2、文本在面上之后，怎么摆正文本又是一个问题，所以用到了笛卡尔坐标系

CartesianCoordinateSystem cartesianCoordinateSystem1 = (CartesianCoordinateSystem)workPart.FindObject("ENTITY 45 1");
            cartesianCoordinateSystem1.RemoveParameters();
            Point3d origin2 = new Point3d(p.X, p.Y, p.Z);
            cartesianCoordinateSystem1.Origin = origin2;
            Vector3d xDirection1 = new Vector3d(1, 0, 0);
            Vector3d yDirection1 = new Vector3d(0, 1, 0);
            if (dir[2] == 1)
            {
                xDirection1 = new Vector3d(1, 0, 0);
                yDirection1 = new Vector3d(0, 1, 0);
            }
            else if (dir[2] == -1)
            {
                xDirection1 = new Vector3d(1, 0, 0);
                yDirection1 = new Vector3d(0, -1, 0);
            }
            else if (dir[1] == 1)
            {
                xDirection1 = new Vector3d(-1, 0, -0);
                yDirection1 = new Vector3d(-0, -0, 1);
            }
            else if (dir[1] == -1)
            {
                xDirection1 = new Vector3d(1, 0, 0);
                yDirection1 = new Vector3d(0, 0, 1);
            }
            else if (dir[0] == 1)
            {
                xDirection1 = new Vector3d(-0.0, 1.0, -0.0);
                yDirection1 = new Vector3d(-0.0, -0.0, 1.0);
            }
            else if (dir[0] == -1)
            {
                xDirection1 = new Vector3d(0.0, -1.0, 0.0);
                yDirection1 = new Vector3d(-0.0, -0.0, 1.0);
            }
            cartesianCoordinateSystem1.SetDirections(xDirection1, yDirection1);
            textBuilder1.PlanarFrame.UpdateOnCoordinateSystem();

开发过程中，大家可以用下面的代码显示出笛卡尔坐标系，以辅助开发cartesianCoordinateSystem1.SetVisibility(SmartObject.VisibilityOption.Visible);

3、这里还有一个大大坑，就是创建的文本没有返回Tag，所以我这里通过在Commit()方法前后分别获取所有的特征对象的方式，才获取到创建的文本

ListfeaList = new List();
            feaList = GetFeatureList();

            NXObject nXObject2;
            nXObject2 = textBuilder1.Commit();

            textBuilder1.Destroy();

            foreach (Feature fea in workPart.Features)
            {
                if (!feaList.Contains(fea))
                {
                    Extrude(fea.JournalIdentifier,dir);//执行拉伸命令
                    return fea.JournalIdentifier;
                }
            }

运行结果如图：

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网站题目：UG/NX二次开发(C#)自动刻字三部曲1-打印文本-创新互联
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