AutoCAD 2019 + VS2019 + C#二次开发学习笔记day05（持续更新）

一、 给定半径和圆心 绘制圆 Circle

类   Circle 构造函数有两个：

public Circle(); public Circle(Point3d center,Vector3d normal,double radius);

1、 代码 记录

写入CircleTest.cs文件里

using Autodesk.AutoCAD.DatabaseServices;using Autodesk.AutoCAD.Geometry;using Autodesk.AutoCAD.Runtime;using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks; namespace Yztest4{    public class CircleTest    {        [CommandMethod("Circletest")]        public void Circletest()        {            //类 Circle 圆            //两个构造函数            //public Circle();            //public Circle(Point3d center, Vector3d normal, double radius);            Circle c1 = new Circle();            c1.Center = new Point3d(50, 50, 0);            c1.Radius = 50;            Circle c2 = new Circle(new Point3d(100, 100, 0), new Vector3d(0, 0, 1), 50);            Database db = HostApplicationServices.WorkingDatabase;            db.AddEntityToModelSpace(c1, c2);        }     }}

2、封装 函数

写入AddEntityTool.cs文件里

/// <summary>/// 绘制圆/// </summary>/// <param name="db">图形数据库</param>/// <param name="center">圆心</param>/// <param name="radius">半径</param>/// <returns>ObjectId</returns>public static ObjectId AddCircleToModelSpace(this Database db,Point3d center,Point3d radius){    return db.AddEntityToModelSpace(new Circle(center, new Vector3d(0, 0, 1), radius);}

写完封装函数后，就可以把CircleTest.cs文件里的代码改写了

Database db = HostApplicationServices.WorkingDatabase;db.AddCircleToModelSpace(new Point3d(100, 100, 0), 100);

二、给定两点绘制圆

1、代码记录

写入CircleTest.cs文件中
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