minimum distance between two entities

[Anonymous]

Hello,

How can we find minimum distance between the entities (entity can be a polyline, circle, arc, etc).

[_gile]

Hi,

If the entities derive from Curve, you can get the corresponding Curve3d object with the Curve.GetGeCurve() method.

The Curve3d type has a Curve3d.GetDistanceTo(Curve3d) method which returns the minimum distance beween the curves.

[Anonymous]

Sir,

thank u for reply.

 if there are two entities close to each other( closed entity having four sides ), then how can i get minimum distance between them.?

[_gile · Accepted solution]

Here's a testing command using the process I described upper (requires A2013+ for the GetGeCurve() method).

        [CommandMethod("MinDist")]
        public void GetMinimumDistance()
        {
            var doc = Application.DocumentManager.MdiActiveDocument;
            var db = doc.Database;
            var ed = doc.Editor;

            var options = new PromptEntityOptions("\nSelect first object: ");
            options.SetRejectMessage("Must be a curve.");
            options.AddAllowedClass(typeof(Curve), false);
            var result = ed.GetEntity(options);
            if (result.Status != PromptStatus.OK)
                return;
            var id1 = result.ObjectId;

            options.Message = "\nSelect second object: ";
            result = ed.GetEntity(options);
            if (result.Status != PromptStatus.OK)
                return;
            var id2 = result.ObjectId;

            using (var tr = db.TransactionManager.StartTransaction())
            {
                var curve1 = (Curve)tr.GetObject(id1, OpenMode.ForRead);
                var curve2 = (Curve)tr.GetObject(id2, OpenMode.ForRead);
                var distance = curve1.GetGeCurve().GetDistanceTo(curve2.GetGeCurve());
                ed.WriteMessage("\nDistance = {0}", distance);
                tr.Commit();
            }
        }

[Anonymous]

thanks u very much..

[Anonymous]

Hello Gilles,

May I know how to use this? I'm very new to programming. 

Do you have any screen shots for this?

Thank you very much in advance.