[C#/AutoCAD] Polyline Jig 사용법

일반 Command인 'poyline'을 입력하면 Picking 지점에 선이 생기면서 각 지점을 확인하며 작업을 이어갈 수 있다.

.Net API에서도 동일하게 하려면 EntityJig를 사용해야 하며, Polyline은 아래와 같이 작성한다.

public class Commands
    {
        [CommandMethod("TEST")]
        public static void Test()
        {
            var doc = Application.DocumentManager.MdiActiveDocument;
            var db = doc.Database;
            var ed = doc.Editor;
            var ppr = ed.GetPoint("\nFirst point: ");
            if (ppr.Status != PromptStatus.OK)
                return;
            using (var tr = db.TransactionManager.StartTransaction())
            {
                using (var pline = new Polyline())
                {
                    pline.AddVertexAt(0, ppr.Value.Convert2d(new Plane()), 0.0, 0.0, 0.0);
                    pline.AddVertexAt(1, Point2d.Origin, 0.0, 0.0, 0.0);
                    pline.TransformBy(ed.CurrentUserCoordinateSystem);
                    var jig = new PlineJig(pline);
                    var cSpace = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);
                    while (true)
                    {
                        var pr = ed.Drag(jig);
                        if (pr.Status == PromptStatus.Cancel)
                            return;
                        if (pr.Status == PromptStatus.OK)
                        {
                            pline.AddVertexAt(pline.NumberOfVertices, Point2d.Origin, 0.0, 0.0, 0.0);
                            db.TransactionManager.QueueForGraphicsFlush();
                        }
                        else
                        {
                            pline.RemoveVertexAt(pline.NumberOfVertices - 1);
                            if (pr.Status == PromptStatus.Keyword)
                            {
                                pline.Closed = true;
                            }
                            else if ( pline.NumberOfVertices < 2)
                            {
                                return;
                            }
                            cSpace.AppendEntity(pline);
                            tr.AddNewlyCreatedDBObject(pline, true);
                            break;
                        }
                    }
                }
                tr.Commit();
            }
        }
    }

    class PlineJig : EntityJig
    {
        Polyline pline;
        Point3d dragPt;
        Plane plane;

        public PlineJig(Polyline pline) : base(pline)
        {
            this.pline = pline;
            plane = new Plane(Point3d.Origin, pline.Normal);
        }
        protected override SamplerStatus Sampler(JigPrompts prompts)
        {
            var options = new JigPromptPointOptions("\nNext point: ");
            options.BasePoint = pline.GetPoint3dAt(pline.NumberOfVertices - 2);
            options.UseBasePoint = true;
            if (3 < pline.NumberOfVertices)
            {
                options.Keywords.Add("Close");
                options.AppendKeywordsToMessage = true;
            }
            options.UserInputControls =
                UserInputControls.Accept3dCoordinates |
                UserInputControls.GovernedByOrthoMode |
                UserInputControls.GovernedByUCSDetect |
                UserInputControls.NullResponseAccepted;
            var result = prompts.AcquirePoint(options);
            if (result.Value.IsEqualTo(dragPt))
                return SamplerStatus.NoChange;
            dragPt = result.Value;
            return SamplerStatus.OK;
        }
        protected override bool Update()
        {
            pline.SetPointAt(pline.NumberOfVertices - 1, dragPt.Convert2d(plane));
            return true;
        }
    }

출처 : https://forums.autodesk.com/t5/net/polyline-jig-displaying-drawn-segments-of-polyline/m-p/9950238