public void Cmd2()
{
Document doc = Application.DocumentManager.MdiActiveDocument;
Editor ed = doc.Editor;
Autodesk.AutoCAD.DatabaseServices.Polyline pyLine = new Autodesk.AutoCAD.DatabaseServices.Polyline();
var bsPointRes = ed.GetPoint(new PromptPointOptions("\n请输入圆心"));
if (bsPointRes.Status == PromptStatus.OK)
{
pyLine.AddVertexAt(pyLine.NumberOfVertices, new Point2d(bsPointRes.Value.X, bsPointRes.Value.Y), 0, 0, 0);
var jigPtOpts = new JigPromptPointOptions();
var dimAlign = new AlignedDimension();
var donut = new JigHelper();
donut.SetEntities(new Entity[] { pyLine, dimAlign });
for (int i = 1; i < int.MaxValue; i++)
{
donut.PrapareForNextInput(jigPtOpts, "\n请输入下一个点");
donut.SetUpdate(jig =>
{
if (pyLine.NumberOfVertices == i)
{
pyLine.AddVertexAt(pyLine.NumberOfVertices, new Point2d(jig.Point.X, jig.Point.Y), 0, 0, 0);
}
else
{
pyLine.SetPointAt(i, new Point2d(jig.Point.X, jig.Point.Y));
}
Point3d pt1 = pyLine.GetPoint3dAt(i - 1);
Point3d pt2 = pyLine.GetPoint3dAt(i);
var vec3d = pt1 - pt2;
var vec3d2 = vec3d.RotateBy(Math.PI / 2, Vector3d.ZAxis);
Point3d cPoint3d = new Point3d((pt1.X + pt2.X) / 2, (pt1.Y + pt2.Y) / 2, 0);
dimAlign.XLine1Point = pt1;
dimAlign.XLine2Point = pt2;
dimAlign.DimLinePoint = cPoint3d + vec3d2 * 0.5;
dimAlign.DimensionText = null;
dimAlign.DimensionStyle = ObjectId.Null;
});
dimAlign.ToSpace();
dimAlign = new AlignedDimension();
var status = donut.Drag();
if (status == PromptStatus.Cancel)
{
break;
}
else if (status != PromptStatus.OK)
{
return;
}
}
pyLine.ToSpace();
}
}