AutoCAD .Net EntityJig – Jig Circle by Center and Radius

来源：互联网发布：淘宝店铺怎么看退货率编辑：程序博客网时间：2024/05/21 07:00
本实例展示使用 EntityJig 技术，动态交互模式创建圆。
这里写图片描述
翻译自: AutoCAD .NET: EntityJig – Jig Circle by Center and Radius
using Autodesk.AutoCAD.Runtime;using Autodesk.AutoCAD.ApplicationServices;using Autodesk.AutoCAD.DatabaseServices;using Autodesk.AutoCAD.Geometry;using Autodesk.AutoCAD.EditorInput;[CommandMethod("JigCircle")]public static void JigCircle(){    Document doc = Application.DocumentManager.MdiActiveDocument;    if (CircleJigger.Jig())    {        doc.Editor.WriteMessage("\nSuccess\n");    }    else    {        doc.Editor.WriteMessage("\nFailure\n");    }}public class CircleJigger : EntityJig{    private Circle _circle;    public int step = 1;    private Point3d _center = new Point3d();    private double _radius = 0.0001;    public CircleJigger(Circle circle)        : base(circle)    {        _circle = circle;        _circle.Center = _center;        _circle.Radius = _radius;    }    protected override bool Update()    {        switch (step)        {            case 1:                _circle.Center = _center;                break;            case 2:                _circle.Radius = _radius;                break;            default:                return false;        }        return true;    }    protected override SamplerStatus Sampler(JigPrompts prompts)    {        switch (step)        {            case 1:                JigPromptPointOptions prOptions1 = new JigPromptPointOptions("\n圆心:");                PromptPointResult prResult1 = prompts.AcquirePoint(prOptions1);                if (prResult1.Status == PromptStatus.Cancel)                    return SamplerStatus.Cancel;                if (prResult1.Value.Equals(_center))                {                    return SamplerStatus.NoChange;                }                else                {                    _center = prResult1.Value;                    return SamplerStatus.OK;                }            case 2:                JigPromptDistanceOptions prOptions2 = new JigPromptDistanceOptions("\n半径:");                prOptions2.BasePoint = _center;                PromptDoubleResult prResult2 = prompts.AcquireDistance(prOptions2);                if (prResult2.Status == PromptStatus.Cancel)                    return SamplerStatus.Cancel;                if (prResult2.Value.Equals(_radius))                {                    return SamplerStatus.NoChange;                }                else                {                    if (prResult2.Value < 0.0001)                    {                        return SamplerStatus.NoChange;                    }                    else                    {                        _radius = prResult2.Value;                        return SamplerStatus.OK;                    }                }            default:                break;        }        return SamplerStatus.OK;    }    public static bool Jig()    {        try        {            Document doc = Application.DocumentManager.MdiActiveDocument;            Database db = doc.Database;            Circle circle = new Circle();            CircleJigger jigger = new CircleJigger(circle);            PromptResult pr;            do            {                pr = doc.Editor.Drag(jigger);                jigger.step++;            }            while (pr.Status != PromptStatus.Cancel                && jigger.step <= 2);            if (pr.Status != PromptStatus.Cancel)            {                using (Transaction tr = db.TransactionManager.StartTransaction())                {                    BlockTable bt = tr.GetObject(db.BlockTableId,                        OpenMode.ForRead) as BlockTable;                    BlockTableRecord btr = tr.GetObject(                        bt[BlockTableRecord.ModelSpace],                        OpenMode.ForWrite) as BlockTableRecord;                    btr.AppendEntity(jigger.Entity);                    tr.AddNewlyCreatedDBObject(jigger.Entity, true);                    tr.Commit();                }            }            else            {                return false;            }            return true;        }        catch        {            return false;        }    }}
阅读全文
0 0