public static void TestMinimumSurroundingBox()
{
var currentDoc = Application.DocumentManager.MdiActiveDocument;
var editor = currentDoc.Editor;
var database = currentDoc.Database;
// Only select polyline and polyline 2d.
ObjectId polylineId = ObjectId.Null;
while (true)
{
var options = new PromptEntityOptions("\n选择一条曲线：");
var result = editor.GetEntity(options);
if (result.Status == PromptStatus.OK)
{
polylineId = result.ObjectId;
break;
}
if (result.Status == PromptStatus.Cancel)
{
break;
}
editor.WriteMessage("\n选择无效");
}
if (polylineId.IsNull)
{
return;
}
using (var transaction = database.TransactionManager.StartTransaction())
{
IEnumerable <Point3d> points = CurveUtils.GetDistinctVertices(polylineId, transaction);
var boundingBox = CurveUtils.CalcMinimumSurroundingBox(points);
var polyline = new Autodesk.AutoCAD.DatabaseServices.Polyline();
for (int i = 0; i < boundingBox.Length; i++)
{
polyline.AddVertexAt(i, new Point2d(boundingBox[i].X, boundingBox[i].Y), 0, 1, 1);
}
polyline.ColorIndex = 2;
var modelspaceId = SymbolUtilityServices.GetBlockModelSpaceId(database);
var modelspace = transaction.GetObject(modelspaceId, OpenMode.ForWrite) as BlockTableRecord;
modelspace.AppendEntity(polyline);
transaction.AddNewlyCreatedDBObject(polyline, true);
transaction.Commit();
}
}