自定义捕捉对象动态Jig绘制，实现实时更具选择对象变化预览图块
作者：互联网
1、自定义靶框对象
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.Threading.Tasks;
6
7 //CAD开发库
8 using Autodesk.AutoCAD.EditorInput;
9 using Autodesk.AutoCAD.ApplicationServices;
10 using Autodesk.AutoCAD.Runtime;
11 using Autodesk.AutoCAD.Windows;
12 using Autodesk.AutoCAD.Geometry;
13 using Autodesk.AutoCAD.DatabaseServices;
14 using Autodesk.AutoCAD.GraphicsInterface;
15
16 //CAD开发基础库
17 using BaseLibrary.Runtime;
18 using BaseLibrary.ResultData;
19 using BaseLibrary.ExtensionMethod;
20 using BaseLibrary.Filter;
21
22 namespace TSTJig
23 {
24 public class BaseGlyph : Glyph
25 {
26 public override void SetLocation(Point3d point)
27 {
28
29 }
30
31 protected override void SubViewportDraw(ViewportDraw vd)
32 {
33
34 }
35 }
36 }
2、自定义JIg对象
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.Threading.Tasks;
6 //CAD开发库
7 using Autodesk.AutoCAD.EditorInput;
8 using Autodesk.AutoCAD.ApplicationServices;
9 using Autodesk.AutoCAD.Runtime;
10 using Autodesk.AutoCAD.Windows;
11 using Autodesk.AutoCAD.Geometry;
12 using Autodesk.AutoCAD.DatabaseServices;
13
14 //CAD开发基础库
15 using BaseLibrary.Runtime;
16 using BaseLibrary.ResultData;
17 using BaseLibrary.ExtensionMethod;
18 using BaseLibrary.Filter;
19
20 namespace TSTJig
21 {
22 class SnapEntityJig : EntityJig
23 {
24 private Point3d m_Position;
25 private Vector3d m_Direction; //块方向
26 private Curve m_Curve = null;
27
28
29 public SnapEntityJig(Entity entity) : base(entity)
30 {
31 //((Circle)Entity).Center = m_CenterPt;
32 //((Circle)Entity).Radius = m_Radius;
33
34
35 //创建自定义对象捕捉模式
36 CustomObjectSnapMode mode = new CustomObjectSnapMode("third", "_third", "三分之一", new BaseGlyph());
37 //捕捉模式的实体类型为曲线
38 mode.ApplyToEntityType(RXClass.GetClass(typeof(Curve)), CurveSnap);
39 //开启自定义对象捕捉模式
40 CustomObjectSnapMode.Activate("_third");
41 }
42
43 public void CurveSnap(ObjectSnapContext context, ObjectSnapInfo result)
44 {
45 m_Curve = (Curve)context.PickedObject;//当前捕捉到的曲线对象
46 //Point3dCollection snaps = result.SnapPoints;//获取对象的捕捉点集合
47 // //Curve3dCollection snapCurves = result.SnapCurves;
48
49 //if (curve.Closed) return;//如果为闭合曲线，则返回
50 //double startParam = curve.StartParam;//曲线的起点参数
51 //double endParam = curve.EndParam;//曲线的终点参数
52
53
54
55
56 //if (context.LastPoint != null) {
57 // ed.Ex_WriteMessage("LastPoint" + context.LastPoint.ToString());
58 // string str = context.LastPoint.ToString();
59 //}
60 //if (context.PickPoint != null) {
61 // ed.Ex_WriteMessage("PickPoint" + context.PickPoint.ToString());
62 // string str = context.LastPoint.ToString();
63 //}
64 //ed.Ex_WriteMessage(snaps.Count);
65
66
67
68 //将与曲线起点的距离为1/3曲线长度的点作为捕捉点
69 //snaps.Add(curve.GetPointAtParameter(startParam + ((endParam - startParam) / 3)));
70 //将与曲线起点的距离为2/3曲线长度的点作为捕捉点
71 //snaps.Add(curve.GetPointAtParameter(startParam + ((endParam - startParam) * 2 / 3)));
72 //ed.Ex_WriteMessage(context.PickPoint.ToString());
73 }
74
75 public void StopSnap()
76 {
77 //关闭自定义对象捕捉模式
78 CustomObjectSnapMode.Deactivate("_third");
79 }
80
81 protected override SamplerStatus Sampler(JigPrompts prompts)
82 {
83 JigPromptPointOptions optJig = new JigPromptPointOptions();
84 // 用AcquirePoint函数得到用户输入的点.
85 PromptPointResult resJigDis = prompts.AcquirePoint(optJig);
86 Point3d curPt = resJigDis.Value; //获取满足输入选项的输入值
87
88 if (resJigDis.Status == PromptStatus.Cancel)
89 {
90 return SamplerStatus.Cancel;
91 }
92
93 if (m_Position != curPt)
94 {
95 if (m_Curve != null) {
96 if (m_Curve.Ex_IsCurvePoint(m_Position)) {
97 m_Direction = m_Curve.Ex_GetPerpendicularVector(m_Position); //获取垂直向量
98 }
99 }
100 // 保存当前点.
101 m_Position = curPt;
102 return SamplerStatus.OK;
103 }
104 else
105 {
106 return SamplerStatus.NoChange;
107 }
108 }
109
110 protected override bool Update()
111 {
112 ((BlockReference)Entity).Position = m_Position;
113 ((BlockReference)Entity).Rotation = m_Direction.AngleOnPlane(new Plane());
114
115 return true;
116 }
117 }
118 }
3、测试：创建测试图块TST，执行TSTSnapEntityJig
1 [CommandMethod("TSTSnapEntityJig")]
2 public void TSTSnapEntityJig() {
3 Document doc = Application.DocumentManager.MdiActiveDocument;
4 Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
5 Database db = HostApplicationServices.WorkingDatabase;
6 DocumentLock Lock = Application.DocumentManager.GetDocument(db).LockDocument(); //非模态模式，修改文件前进行上锁操作
7 using (Transaction trans = doc.TransactionManager.StartTransaction())
8 {
9 BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForWrite);
10 BlockTableRecord btr = (BlockTableRecord)trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
11 string blockName = "TST";
12 if (bt.Has(blockName))
13 {
14 //第一个状态，实现
15 BlockReference br = new BlockReference(Point3d.Origin, bt[blockName]);
16 SnapEntityJig blockJig = new SnapEntityJig(br);
17 PromptResult resJig = ed.Drag(blockJig);
18 if (resJig.Status == PromptStatus.Cancel)
19 {
20 blockJig.StopSnap();
21 return;
22 }
23 if (resJig.Status == PromptStatus.OK)
24 {
25 blockJig.StopSnap();
26 }
27 }
28 trans.Commit();
29 }
30 Lock.Dispose();
31 }
标签：Jig,AutoCAD,自定义,Autodesk,选择对象,BaseLibrary,System,context,using 来源： https://www.cnblogs.com/chenshuangjian/p/15958257.html