public static Entity[] BreakOnPoint(this Curve ent, Point2d at, QuickTransaction tr, bool commitAtEnd = false)
{
if (ent == null)
{
throw new ArgumentNullException(nameof(ent));
}
if (tr == null)
{
throw new ArgumentNullException(nameof(tr));
}
try {
var btr = (BlockTableRecord)tr.GetObject(tr.Db.CurrentSpaceId, OpenMode.ForWrite);
Point3d att = at.ToPoint3D();
att.TransformBy(tr.Editor.CurrentUserCoordinateSystem.Inverse());
// Check that the point is on the curve
att = ent.GetClosestPointTo(att, false);
var breakPoints = new Point3dCollection();
var newCurves = new DBObjectCollection();
// Get the segments according to the trim points
breakPoints.Add(att);
newCurves = ent.GetSplitCurves(breakPoints);
if (newCurves == null)
{
tr.Editor.WriteMessage("\nGetSplitCurves failed : Error");
return(new Entity[0]);
}
var ret = new List <Entity>();
// Here we add the segments to the database with different colors
for (var i = 0; i < newCurves.Count; i++)
{
var pent = (Entity)newCurves[i];
pent.SetPropertiesFrom(ent);
btr.AppendEntity(pent);
tr.AddNewlyCreatedDBObject(pent, true);
ret.Add(pent);
}
ent.UpgradeOpen();
ent.Erase();
if (commitAtEnd)
{
tr.Commit();
}
return(ret.ToArray());
} catch (Exception ex) {
Autodesk.AutoCAD.ApplicationServices.Core.Application.ShowAlertDialog(ex.Message + "\n" + ex.StackTrace);
return(new Entity[0]);
} finally { }
}
/// <summary>
/// Shifts on line from a specific point for <paramref name="distance"/> length.<br></br>Returns true if successful, false if exceeded the limits - will return basepoint!
/// </summary>
/// <param name="ent">Ent</param>
/// <param name="basepoint">the point to offset from</param>
/// <param name="distance">The distance to offset</param>
/// <returns>true if successful, false if exceeded the limits - will return basepoint!</returns>
public static Tuple <Point2d, bool> OffsetToEnd(this Curve ent, Point2d basepoint, double distance)
{
var basepoint3 = ent.GetClosestPointTo(basepoint.ToPoint3D(), true);
basepoint = basepoint3.ToPoint2D();
try {
var dis = ent.GetDistAtPoint(basepoint3);
var extra = dis + distance;
var pt = ent.GetPointAtDist(extra);
return(Tuple.Create(pt.ToPoint2D(), true));
} catch (Exception e) {
Quick.WriteLine("\nInvalid Input, offset exceeds curve's limits.\n" + e);
return(Tuple.Create(basepoint, false));
}
}
public static int ClosestVertexIndex(this Polyline pl, Point2d pt)
{
pt = pl.GetClosestPointTo(pt.ToPoint3D(), true).ToPoint2D();
for (var i = 0; i < pl.NumberOfVertices; i++)
{
var dbl = new double();
var ons = pl.OnSegmentAt(i, pt, dbl);
if (ons)
{
return(i);
}
}
return(-1);
}