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Polyline2d.md

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Polyline2d Class

Overview

The Polyline2d class represents a piecewise linear spline entity in 2D space (XY plane).

Namespace

Autodesk.AutoCAD.Geometry

Key Properties

Property Type Description
Vertices Point2dCollection Gets the vertices
NumVertices int Gets number of vertices
IsClosed bool Checks if closed

Code Examples

Example 1: Creating 2D Polyline

Point2dCollection vertices = new Point2dCollection();
vertices.Add(new Point2d(0, 0));
vertices.Add(new Point2d(10, 0));
vertices.Add(new Point2d(10, 10));
vertices.Add(new Point2d(0, 10));

Polyline2d polyline = new Polyline2d(vertices, true); // closed

ed.WriteMessage($"\n2D Polyline: {polyline.NumVertices} vertices, closed={polyline.IsClosed}");

Related Classes

  • Polyline3d - 3D polyline
  • LineSegment2d - Individual segments

References