filterList = new TypedValue[]
{
new TypedValue((int)DxfCode.Start, "LINE,CIRCLE,ELLIPSE,ARC,SPLINE,POLYLINE")
};
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
using IfoxDemo;
using System.Collections.Generic;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;namespace AutoCADArcEncryption
{public static class 加密凸度多段线{[CommandMethod("xx1")]public static void 弧转多段线(){using var tr = new DBTrans();// 创建一个弧// 定义选择过滤器，只允许选择椭圆和样条曲线TypedValue[] filterList = new TypedValue[]{new TypedValue((int)DxfCode.Start, "ELLIPSE,SPLINE")};SelectionFilter filter = new SelectionFilter(filterList);// 提示用户选择实体PromptSelectionOptions pso = new PromptSelectionOptions();pso.MessageForAdding = "\n选择椭圆或样条曲线: ";PromptSelectionResult psr = Env.Editor.GetSelection(pso, filter);SelectionSet ss = psr.Value;if (psr.Status != PromptStatus.OK) return;foreach (SelectedObject so in ss){if (so != null){Curve curve = (Curve)tr.GetObject(so.ObjectId, OpenMode.ForRead).Clone();Polyline polyline = null;if (curve is Ellipse ellipse){Spline sp = ellipse.Spline;polyline = (Polyline)sp.ToPolyline();}else if (curve is Spline spline){// 将样条曲线直接转换为多段线polyline = (Polyline)spline.ToPolyline();}if (polyline == null){return;}Env.Database.AddEntityToModeSpace(polyline);}}Env.Editor.ZoomExtents();}/// <summary>/// 处理多段线，将带有凸度的弧段加密为直线段/// </summary>/// <param name="original">原始多段线</param>/// <returns>处理后的多段线</returns>public static Polyline 多段线去凸度(this Polyline original, int num){Polyline cur = new Polyline();// 检查多段线是否有凸度bool hasBulge = false;for (int i = 0; i < original.NumberOfVertices; i++){if (original.GetBulgeAt(i) != 0.0){hasBulge = true;break;}}if (!hasBulge) return cur; // 无凸度，直接返回空值// 创建新多段线并复制属性//Polyline newPolyline = new Polyline();//newPolyline.Closed = original.Closed;//newPolyline.Layer = original.Layer;//newPolyline.Color = original.Color;//newPolyline.Linetype = original.Linetype;Polyline newPolyline = new Polyline();DBObjectCollection dbo = new DBObjectCollection();var original_clone = original.Clone() as Polyline;original_clone.Explode(dbo);List<Polyline> curs = new List<Polyline>();foreach (var item in dbo){if (item is Polyline){curs.Add(item as Polyline);}if (item is Line line){Polyline polyline = new Polyline();polyline.AddVertexAt(0, line.StartPoint.toPoint2d(), 0, 0, 0);polyline.AddVertexAt(1, line.EndPoint.toPoint2d(), 0, 0, 0);curs.Add(polyline);}if (item is Arc arc){var pl2 = 加密弧转多段线(arc, num);curs.Add(pl2 as Polyline);}}var results = 首尾相连.Makepl(curs);var result = results[0];if (result is Polyline pl) { pl.Closed = true; }return result;}public static Polyline 加密弧转多段线(Arc arc, int pointCount){// 创建一个新的多段线对象，用于存储加密后的结果Polyline polyline = new Polyline();// 获取圆弧的起始角度double startAngle = arc.StartAngle;// 获取圆弧的结束角度double endAngle = arc.EndAngle;// 获取圆弧的圆心点Point3d center = arc.Center;// 获取圆弧的半径double radius = arc.Radius;// 计算圆弧的角度差，考虑到可能存在的逆时针情况double delta = endAngle - startAngle;if (delta < 0){// 若角度差为负，说明是逆时针圆弧，将其转换为正的角度差delta += 2 * Math.PI;}// 计算每个细分点之间的角度步长double angleStep = delta / (pointCount - 1);// 添加圆弧的起始点作为多段线的第一个顶点polyline.AddVertexAt(0, new Point2d(arc.StartPoint.X, arc.StartPoint.Y), 0, 0, 0);// 循环生成除起始点和结束点之外的加密点for (int i = 1; i < pointCount - 1; i++){// 计算当前加密点对应的角度double currentAngle = startAngle + i * angleStep;// 对角度进行规范化处理，确保其在 [0, 2π) 范围内currentAngle %= 2 * Math.PI;if (currentAngle < 0){currentAngle += 2 * Math.PI;}// 根据当前角度和圆心、半径计算加密点的 X 坐标double x = center.X + radius * Math.Cos(currentAngle);// 根据当前角度和圆心、半径计算加密点的 Y 坐标double y = center.Y + radius * Math.Sin(currentAngle);// 将计算得到的加密点添加到多段线中polyline.AddVertexAt(i, new Point2d(x, y), 0, 0, 0);}// 添加圆弧的结束点作为多段线的最后一个顶点polyline.AddVertexAt(pointCount - 1, new Point2d(arc.EndPoint.X, arc.EndPoint.Y), 0, 0, 0);// 返回加密后的多段线对象return polyline;}public static Polyline 加密圆转多段线(Circle circle, int pointCount){Polyline polyline = new Polyline();Point3d center = circle.Center;double radius = circle.Radius;double angleStep = 2 * Math.PI / pointCount;for (int i = 0; i < pointCount; i++){double currentAngle = i * angleStep;double x = center.X + radius * Math.Cos(currentAngle);double y = center.Y + radius * Math.Sin(currentAngle);polyline.AddVertexAt(i, new Point2d(x, y), 0, 0, 0);}// 闭合多段线polyline.Closed = true;return polyline;}/// <summary>/// 判断多段线是否有凸度/// </summary>/// <param name="polyline">要检查的多段线对象</param>/// <returns>如果多段线有凸度返回 true，否则返回 false</returns>public static bool 有凸度(this Polyline polyline){for (int i = 0; i < polyline.NumberOfVertices; i++){if (polyline.GetBulgeAt(i) != 0.0){return true;}}return false;}}public static class 首尾相连{public static List<Curve> Make(List<Curve> curs, double rongcha = 0.0001){List<Curve> lianxianfanhui = new List<Curve>();List<List<Curve>> cursref = new List<List<Curve>>();首尾相连分组迭代(curs, ref cursref, rongcha);foreach (List<Curve> curl in cursref){Curve pl = 连续的线连成多段线(curl, rongcha);lianxianfanhui.Add(pl);}return lianxianfanhui;}public static List<Polyline> Makepl(List<Polyline> curs, double rongcha = 0.0001){List<Polyline> lianxianfanhui = new List<Polyline>();List<List<Polyline>> cursref = new List<List<Polyline>>();首尾相连分组迭代pl(curs, ref cursref, rongcha);foreach (List<Polyline> curl in cursref){Polyline pl = 连续的线连成多段线pl(curl, rongcha);lianxianfanhui.Add(pl);}return lianxianfanhui;}static void 首尾相连分组迭代(List<Curve> curs, ref List<List<Curve>> fenzu, double rongcha){List<Curve> yizu = new List<Curve>();yizu.Add(curs[0]);curs.Remove(curs[0]);向后找线(ref yizu, ref curs, rongcha);向前找线(ref yizu, ref curs, rongcha);fenzu.Add(yizu);if (curs.Count > 0) 首尾相连分组迭代(curs, ref fenzu, rongcha);}static void 首尾相连分组迭代pl(List<Polyline> curs, ref List<List<Polyline>> fenzu, double rongcha){List<Polyline> yizu = new List<Polyline>();yizu.Add(curs[0]);curs.Remove(curs[0]);向后找线pl(ref yizu, ref curs, rongcha);向前找线pl(ref yizu, ref curs, rongcha);fenzu.Add(yizu);if (curs.Count > 0) 首尾相连分组迭代pl(curs, ref fenzu, rongcha);}static void 向后找线pl(ref List<Polyline> yizu, ref List<Polyline> curs, double rongcha){var curlast = yizu[yizu.Count - 1];var curfirst = yizu[0];Point3d pStart = curfirst.StartPoint;Point3d pEnd = curlast.EndPoint;Vector3d vtstart = curfirst.GetFirstDerivative(pStart);Vector3d vtend = curlast.GetFirstDerivative(pEnd).Negate();List<int> nend = new List<int>();for (int i = 0; i < curs.Count; i++){Polyline cur = curs[i];if (pEnd.IsEqualTo(cur.StartPoint, new Tolerance(rongcha, rongcha))){nend.Add(i);}else if (pEnd.IsEqualTo(cur.EndPoint, new Tolerance(rongcha, rongcha))){curs[i] = Reversepl(cur);nend.Add(i);}}if (nend.Count > 0){var curscopy = curs;var ii = (from i in nend orderby nsz逆时针夹角(curscopy[i].GetFirstDerivative(curscopy[i].StartPoint), vtend) select i).First();yizu.Add(curs[ii]);curs.RemoveAt(ii);if (curs.Count > 0) 向后找线pl(ref yizu, ref curs, rongcha);}}static void 向前找线pl(ref List<Polyline> yizu, ref List<Polyline> curs, double rongcha){var curlast = yizu[yizu.Count - 1];var curfirst = yizu[0];Point3d pStart = curfirst.StartPoint;Point3d pEnd = curlast.EndPoint;Vector3d vtstart = curfirst.GetFirstDerivative(pStart);Vector3d vtend = curlast.GetFirstDerivative(pEnd).Negate();List<int> nfirst = new List<int>();for (int i = 0; i < curs.Count; i++){Polyline cur = curs[i];if (pStart.IsEqualTo(cur.StartPoint, new Tolerance(rongcha, rongcha))){curs[i] = Reversepl(cur);nfirst.Add(i);}else if (pStart.IsEqualTo(cur.EndPoint, new Tolerance(rongcha, rongcha))){nfirst.Add(i);}}if (nfirst.Count > 0){var curscopy = curs;var ii = (from i in nfirst orderby nsz逆时针夹角(curscopy[i].GetFirstDerivative(curscopy[i].EndPoint).Negate(), vtstart) select i).First();yizu.Insert(0, curs[ii]);curs.RemoveAt(ii);if (curs.Count > 0) 向前找线pl(ref yizu, ref curs, rongcha);else return;}}static void 向后找线(ref List<Curve> yizu, ref List<Curve> curs, double rongcha){var curlast = yizu[yizu.Count - 1];var curfirst = yizu[0];Point3d pStart = curfirst.StartPoint;Point3d pEnd = curlast.EndPoint;Vector3d vtstart = curfirst.GetFirstDerivative(pStart);Vector3d vtend = curlast.GetFirstDerivative(pEnd).Negate();List<int> nend = new List<int>();for (int i = 0; i < curs.Count; i++){Curve cur = curs[i];if (pEnd.IsEqualTo(cur.StartPoint, new Tolerance(rongcha, rongcha))){nend.Add(i);}else if (pEnd.IsEqualTo(cur.EndPoint, new Tolerance(rongcha, rongcha))){curs[i] = ReverseCur(cur);nend.Add(i);}}if (nend.Count > 0){var curscopy = curs;var ii = (from i in nend orderby nsz逆时针夹角(curscopy[i].GetFirstDerivative(curscopy[i].StartPoint), vtend) select i).First();yizu.Add(curs[ii]);curs.RemoveAt(ii);if (curs.Count > 0) 向后找线(ref yizu, ref curs, rongcha);}}static void 向前找线(ref List<Curve> yizu, ref List<Curve> curs, double rongcha){var curlast = yizu[yizu.Count - 1];var curfirst = yizu[0];Point3d pStart = curfirst.StartPoint;Point3d pEnd = curlast.EndPoint;Vector3d vtstart = curfirst.GetFirstDerivative(pStart);Vector3d vtend = curlast.GetFirstDerivative(pEnd).Negate();List<int> nfirst = new List<int>();for (int i = 0; i < curs.Count; i++){Curve cur = curs[i];if (pStart.IsEqualTo(cur.StartPoint, new Tolerance(rongcha, rongcha))){curs[i] = ReverseCur(cur);nfirst.Add(i);}else if (pStart.IsEqualTo(cur.EndPoint, new Tolerance(rongcha, rongcha))){nfirst.Add(i);}}if (nfirst.Count > 0){var curscopy = curs;var ii = (from i in nfirst orderby nsz逆时针夹角(curscopy[i].GetFirstDerivative(curscopy[i].EndPoint).Negate(), vtstart) select i).First();yizu.Insert(0, curs[ii]);curs.RemoveAt(ii);if (curs.Count > 0) 向前找线(ref yizu, ref curs, rongcha);else return;}}static double nsz逆时针夹角(Vector3d v1, Vector3d v2){double rt = v2.RotateBy(Math.PI * 2 - v1.AngleOnPlane(new Plane()), Vector3d.ZAxis).AngleOnPlane(new Plane());if (Math.Abs(rt - Math.PI * 2) < 0.001) rt = 0;return rt;}public static Polyline 连续的线连成多段线(List<Curve> curlist, double rongcha){Polyline pl = new Polyline();if (curlist.Count == 0) return null;if (curlist.Count == 1) return curlist[0].CurvetoPolyline1();//判断线的正反if (curlist[0].StartPoint.IsEqualTo(curlist[1].StartPoint, new Tolerance(rongcha, rongcha)) || curlist[0].StartPoint.IsEqualTo(curlist[1].EndPoint, new Tolerance(rongcha, rongcha))){ curlist[0] = ReverseCur(curlist[0]); }for (int i = 1; i < curlist.Count; i++){if (curlist[i].EndPoint.IsEqualTo(curlist[i - 1].StartPoint, new Tolerance(rongcha, rongcha)) || curlist[i].EndPoint.IsEqualTo(curlist[i - 1].EndPoint, new Tolerance(rongcha, rongcha)))curlist[i] = ReverseCur(curlist[i]);}int k = 0;for (int i = 0; i < curlist.Count; i++){Curve cur = curlist[i];if (cur is Line){Point2d ptve = (cur.StartPoint.toPoint2d1());pl.AddVertexAt(k++, ptve, 0, 0, 0);}else if (cur is Arc arc){Point2d ptve = (cur.StartPoint.toPoint2d1());double tudu = ArcBulge(arc, arc.StartPoint, arc.EndPoint);pl.AddVertexAt(k++, ptve, tudu, 0, 0);}else if (cur is Polyline pl0){if (pl0.Normal.Z == -1) pl0.TransformBy(Matrix3d.Mirroring(new Plane()));for (int ii = 0; ii < pl0.NumberOfVertices - 1; ii++){pl.AddVertexAt(k++, pl0.GetPoint2dAt(ii), pl0.GetBulgeAt(ii), 0, 0);}}else if (cur is Spline spl){Polyline p = spl.CurvetoPolyline1() as Polyline;for (int ii = 0; ii < p.NumberOfVertices - 1; ii++){pl.AddVertexAt(k++, p.GetPoint2dAt(ii), p.GetBulgeAt(ii), 0, 0); ;}}else{Spline s = cur.Spline;Polyline p = s.CurvetoPolyline1();for (int ii = 0; ii < p.NumberOfVertices - 1; ii++){pl.AddVertexAt(k++, p.GetPoint2dAt(ii), p.GetBulgeAt(ii), 0, 0); ;}}}Point2d ptend = (curlist[curlist.Count - 1].EndPoint.toPoint2d1());pl.AddVertexAt(k, ptend, 0, 0, 0);return pl;}public static Polyline 连续的线连成多段线pl(List<Polyline> curlist, double rongcha){Polyline pl = new Polyline();if (curlist.Count == 0) return null;if (curlist.Count == 1) return curlist[0].CurvetoPolyline1();//判断线的正反if (curlist[0].StartPoint.IsEqualTo(curlist[1].StartPoint, new Tolerance(rongcha, rongcha)) || curlist[0].StartPoint.IsEqualTo(curlist[1].EndPoint, new Tolerance(rongcha, rongcha))){ curlist[0] = Reversepl(curlist[0]); }for (int i = 1; i < curlist.Count; i++){if (curlist[i].EndPoint.IsEqualTo(curlist[i - 1].StartPoint, new Tolerance(rongcha, rongcha)) || curlist[i].EndPoint.IsEqualTo(curlist[i - 1].EndPoint, new Tolerance(rongcha, rongcha)))curlist[i] = Reversepl(curlist[i]);}int k = 0;for (int i = 0; i < curlist.Count; i++){Curve cur = curlist[i];if (cur is Line){Point2d ptve = (cur.StartPoint.toPoint2d1());pl.AddVertexAt(k++, ptve, 0, 0, 0);}else if (cur is Arc arc){Point2d ptve = (cur.StartPoint.toPoint2d1());double tudu = ArcBulge(arc, arc.StartPoint, arc.EndPoint);pl.AddVertexAt(k++, ptve, tudu, 0, 0);}else if (cur is Polyline pl0){if (pl0.Normal.Z == -1) pl0.TransformBy(Matrix3d.Mirroring(new Plane()));for (int ii = 0; ii < pl0.NumberOfVertices - 1; ii++){pl.AddVertexAt(k++, pl0.GetPoint2dAt(ii), pl0.GetBulgeAt(ii), 0, 0);}}else if (cur is Spline spl){Polyline p = spl.CurvetoPolyline1() as Polyline;for (int ii = 0; ii < p.NumberOfVertices - 1; ii++){pl.AddVertexAt(k++, p.GetPoint2dAt(ii), p.GetBulgeAt(ii), 0, 0); ;}}else{Spline s = cur.Spline;Polyline p = s.CurvetoPolyline1();for (int ii = 0; ii < p.NumberOfVertices - 1; ii++){pl.AddVertexAt(k++, p.GetPoint2dAt(ii), p.GetBulgeAt(ii), 0, 0); ;}}}Point2d ptend = (curlist[curlist.Count - 1].EndPoint.toPoint2d1());pl.AddVertexAt(k, ptend, 0, 0, 0);return pl;}public static Polyline CurvetoPolyline1(this Curve cur){Polyline plrt = new Polyline();if (cur is Polyline pl){plrt = pl;}if (cur is Line ll){plrt.AddVertexAt(0, (ll.StartPoint.toPoint2d1()), 0, 0, 0);plrt.AddVertexAt(1, (ll.EndPoint.toPoint2d1()), 0, 0, 0);}if (cur is Arc arc){plrt.AddVertexAt(0, (arc.StartPoint.toPoint2d1()), ArcBulge(arc, arc.StartPoint, arc.EndPoint), 0, 0);plrt.AddVertexAt(1, (arc.EndPoint.toPoint2d1()), 0, 0, 0);}if (cur is Circle cir){plrt.AddVertexAt(0, (cir.StartPoint.toPoint2d1()), Math.Tan(Math.PI / 4), 0, 0);plrt.AddVertexAt(1, (cir.GetPointAtDist(cir.Circumference / 2).toPoint2d1()), Math.Tan(Math.PI / 4), 0, 0);plrt.AddVertexAt(2, (cir.StartPoint.toPoint2d1()), 0, 0, 0);}if (cur is Spline spl){for (int i = 0; i <= 100; i++){double dist = (spl.GetDistAtPoint(spl.EndPoint) - spl.GetDistAtPoint(spl.StartPoint)) / 100;plrt.AddVertexAt(i, (spl.GetPointAtDist(dist * i).Convert2d(new Plane())), 0, 0, 0);}//plrt = spl.SplineToPolyline(1e-3);//plrt = spl.ToPolyline() as Polyline;}if (cur is Ellipse ell){for (int i = 0; i <= 100; i++){double dist = (ell.GetDistAtPoint(ell.EndPoint) - ell.GetDistAtPoint(ell.StartPoint)) / 100;plrt.AddVertexAt(i, (ell.GetPointAtDist(dist * i).Convert2d(new Plane())), 0, 0, 0);}//plrt = ell.Spline.SplineToPolyline(1e-3);//plrt = ell.Spline.ToPolyline() as Polyline;}return plrt;}static double ArcBulge(this Arc arc, Point3d pfist, Point3d pend){Point3d midpt = arc.GetPointAtDist(arc.GetDistanceAtParameter(arc.EndParam) / 2);Vector3d vtse = pend - pfist;Vector3d vtsm = midpt - pfist;bool arcni = vtsm.CrossProduct(vtse).Z > 0 ? true : false;double bulge = Math.Tan(arc.TotalAngle / 4);//凸度是圆心角的四分之一的正切 bulge *= arcni ? 1 : -1;return bulge;}static Curve ReverseCur(this Curve cur){if (cur.Closed == true) return cur;else if (cur is Line l){return new Line(l.EndPoint, l.StartPoint);}else if (cur is Arc arc){Polyline pl = new Polyline();Point3d st = arc.EndPoint;Point3d en = arc.StartPoint;double tudu = ArcBulge(arc, arc.EndPoint, arc.StartPoint);pl.AddVertexAt(0, st.toPoint2d1(), tudu, 0, 0);pl.AddVertexAt(1, en.toPoint2d1(), 0, 0, 0);return pl;}else if (cur is Polyline pl){Polyline plnew = new Polyline();int n = pl.NumberOfVertices;List<double> tudu = new List<double>();List<Point2d> jiedian = new List<Point2d>();for (int i = 0; i < n; i++){tudu.Add(pl.GetBulgeAt(i));jiedian.Add(pl.GetPoint2dAt(i));}jiedian.Reverse();tudu.Reverse();tudu.RemoveAt(0);tudu.Add(0);for (int i = 0; i < n; i++){plnew.AddVertexAt(i, jiedian[i], -tudu[i], 0, 0);}return plnew;}else{Spline s = cur.Spline;List<Point3d> pts = new List<Point3d>();double leng = s.GetDistanceAtParameter(s.EndParam);pts.Add(s.StartPoint);for (int i = 1; i < 100; i++){pts.Add(s.GetPointAtDist(leng / 100 * i));}pts.Add(s.EndPoint);pts.Reverse();Polyline plnew = new Polyline();for (int i = 0; i <= 100; i++){plnew.AddVertexAt(i, pts[i].toPoint2d1(), 0, 0, 0);}return plnew;}}static Polyline Reversepl(this Polyline pl){if (pl.Closed == true) return pl;Polyline plnew = new Polyline();int n = pl.NumberOfVertices;List<double> tudu = new List<double>();List<Point2d> jiedian = new List<Point2d>();for (int i = 0; i < n; i++){tudu.Add(pl.GetBulgeAt(i));jiedian.Add(pl.GetPoint2dAt(i));}jiedian.Reverse();tudu.Reverse();tudu.RemoveAt(0);tudu.Add(0);for (int i = 0; i < n; i++){plnew.AddVertexAt(i, jiedian[i], -tudu[i], 0, 0);}return plnew;}static Point2d toPoint2d1(this Point3d pt){var pt2d = new Point2d(pt.X, pt.Y);return pt2d;}}}
