几何类使用相关

雪山飞狐_lzh

        //使用Ge曲线的简单例子
        //对直线和圆求交点,并返回交点分隔的部分
        [CommandMethod("t9")]
        public static void Test9()
        {
            //Ge直线
            Line2d l2d = new Line2d(Point2d.Origin, Vector2d.XAxis);
            //Ge圆
            CircularArc2d ca2d = new CircularArc2d(new Point2d(5, 5), 15);

            //交点集合
            List<oint2d> pnts = new List<oint2d>();

            //交点处的参数集合
            List<double> pars1 = new List<double>();
            List<double> pars2 = new List<double>();

            //求交
            using (var cci2d = new CurveCurveIntersector2d(l2d, ca2d))
            {
                for (int i = 0; i < cci2d.NumberOfIntersectionPoints; i++)
                {
                    pnts.Add(cci2d.GetIntersectionPoint(i));
                    var k = cci2d.GetIntersectionParameters(i);
                    pars1.Add(k[0]);
                    pars2.Add(k[1]);
                }
            }

            var db = HostApplicationServices.WorkingDatabase;
            var doc = Application.DocumentManager.GetDocument(db);
            var ed = doc.Editor;
 
            int j = 0;
            pnts.ForEach(p => ed.WriteMessage("\n第{0}个交点为:{1}", ++j, p));

            //转换结果为Db曲线
            using (var tr = db.TransactionManager.StartTransaction())
            {

                var btr = db.CurrentSpaceId.GetObject(OpenMode.ForWrite) as BlockTableRecord;

                pars1.Sort();
                LineSegment2d ls2d = new LineSegment2d(l2d.EvaluatePoint(pars1[0]), l2d.EvaluatePoint(pars1[1]));
                var line = ls2d.ToCurve(Matrix3d.Identity);
                btr.AppendEntity(line);
                tr.AddNewlyCreatedDBObject(line, true);

                pars2.Sort();
                ca2d.SetInterval(new Interval(pars2[0], pars2[1], 0));
                var arc = ca2d.ToCurve(Matrix3d.Identity);
                btr.AppendEntity(arc);
                tr.AddNewlyCreatedDBObject(arc, true);

                tr.Commit();

            }
        }

 

代码效果：

ABD

大佬们有2个问题请教一下：Ge曲线和db曲线有什么不同，LineSegment2d这类和实际的line有啥区别

流浪路人甲

学习了，有个疑问，Ge对象是不是不能直接读取其属性值

evergreenxq

顶起，完美的代码，赞一个

hmxmylove

学习了。

yxr_MJTD

lzh741206发的,我直接收藏.

mycad

学习,顶！！！！！

雪山飞狐_lzh

点到直线的垂足

 

        [CommandMethod("t11")]
        public static void Test11()
        {
            var db = HostApplicationServices.WorkingDatabase;
            var doc = Application.DocumentManager.GetDocument(db);
            var ed = doc.Editor;

            var resEnt = ed.GetEntity("\n请选择一条直线:");
            if (resEnt.Status != PromptStatus.OK)
                return;

            var resPnt = ed.GetPoint("\n请选择直线外的一点:");
            if (resPnt.Status != PromptStatus.OK)
                return;

            using (var tr = db.TransactionManager.StartTransaction())
            {
                Line line = resEnt.ObjectId.GetObject(OpenMode.ForRead) as Line;
                LineSegment3d ls3d = new LineSegment3d(line.StartPoint, line.EndPoint); ;
                Line3d l3d = new Line3d(line.StartPoint, line.EndPoint);

                Point3d pt1 = resPnt.Value;
                Point3d pt2 = l3d.GetClosestPointTo(pt1).Point;

                ed.WriteMessage
                (
                    "\n点{0}\n到直线的垂足为{1};\n距离为{2};\n在直线{3}",
                    pt1,
                    pt2,
                    (pt2 - pt1).Length,
                    ls3d.IsOn(pt2) ? "内" : "外"
                );

                ed.DrawVector(pt1, pt2, 1, false);

            }

        }

 

效果：

 

xiwuchen@qq

呵呵，看到了，谢谢飞弧哥

飞诗(fsxm)

大家排队顶起！

Fenix

顶下

xiwuchen@qq

回头再顶一次

 

Student

学习，顶