public static void Test()
{
ObjectId[] objectId = Interaction.GetSelection("\n选择多段线", "LWPOLYLINE");//选择多段线
if (objectId.Length == 0)
{
return; //一个都没选的情况下退出操作
}
objectId.QForEach <Polyline>(polyline =>
{
int length = (int)polyline.EndParam;
for (int i = 0; i <= length; i++)
{
Line l1 = NoDraw.Line(polyline.GetPointAtParam(i), polyline.GetPreviousPointAtParam(i));
Line l2 = NoDraw.Line(polyline.GetPointAtParam(i), polyline.GetNextPointAtParam(i));
// Checks if lines intersect
Plane plane;
Line3d line1 = new Line3d(l1.StartPoint, l1.EndPoint);
Line3d line2 = new Line3d(l2.StartPoint, l2.EndPoint);
if (!line1.IsCoplanarWith(line2, out plane) || line1.IsParallelTo(line2))
{
return;
}
// Calculates the bisector
Point3d inters = line1.IntersectWith(line2)[0];
Vector3d vec1 = line1.Direction;
Vector3d vec2 = line2.Direction;
Vector3d bisectDir = ((vec1 + vec2) / 2.0).Negate();
var angle = bisectDir.GetAngleTo(Vector3d.XAxis);
Xline xline = new Xline();
xline.UnitDir = bisectDir.GetNormal();
xline.BasePoint = inters;
Draw.Text((i + 1).ToString(), 2, xline.GetPointAtDist(1));
Draw.Circle(polyline.GetPointAtParam(i), 0.5);
}
});
}
public void Bisector()
{
Document doc = Application.DocumentManager.MdiActiveDocument;
Database db = doc.Database;
Editor ed = doc.Editor;
PromptEntityOptions peo = new PromptEntityOptions("\nSelect the first line: ");
peo.SetRejectMessage("Selected object is not a line !");
peo.AddAllowedClass(typeof(Line), true);
PromptEntityResult per = ed.GetEntity(peo);
if (per.Status != PromptStatus.OK)
{
return;
}
Point3d p1 = per.PickedPoint.TransformBy(ed.CurrentUserCoordinateSystem);
ObjectId id1 = per.ObjectId;
peo.Message = "\nSelect the second line: ";
per = ed.GetEntity(peo);
if (per.Status != PromptStatus.OK)
{
return;
}
Point3d p2 = per.PickedPoint.TransformBy(ed.CurrentUserCoordinateSystem);
ObjectId id2 = per.ObjectId;
using (Transaction tr = db.TransactionManager.StartTransaction())
{
Line l1 = (Line)tr.GetObject(id1, OpenMode.ForRead);
Line l2 = (Line)tr.GetObject(id2, OpenMode.ForRead);
// Checks if lines intersect
Plane plane;
Line3d line1 = new Line3d(l1.StartPoint, l1.EndPoint);
Line3d line2 = new Line3d(l2.StartPoint, l2.EndPoint);
if (!line1.IsCoplanarWith(line2, out plane) || line1.IsParallelTo(line2))
{
return;
}
// Calculates the bisector
Point3d inters = line1.IntersectWith(line2)[0];
Vector3d vec1 = line1.Direction;
Vector3d vec2 = line2.Direction;
// Corrects the vectors direction according to picked points
if (vec1.DotProduct(inters.GetVectorTo(p1)) < 0)
{
vec1 = vec1.Negate();
}
if (vec2.DotProduct(inters.GetVectorTo(p2)) < 0)
{
vec2 = vec2.Negate();
}
Vector3d bisectDir = (vec1 + vec2) / 2.0;
// Draws the bisector (XLine)
Xline xline = new Xline();
xline.UnitDir = bisectDir.GetNormal();
xline.BasePoint = inters;
BlockTableRecord btr = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);
btr.AppendEntity(xline);
tr.AddNewlyCreatedDBObject(xline, true);
tr.Commit();
}
}
