topic Re: how to get the coordinates of acdb2dpolyline in .NET Forum

how to get the coordinates of acdb2dpolyline

Anonymous — Tue, 01 Aug 2017 01:24:00 GMT

how to get the coordinates of acdb2dpolyline? I setup a project with C# and "com", the code like this

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Autodesk.AutoCAD.Interop;
using Autodesk.AutoCAD.Interop.Common;
.......

foreach (AcadObject acadObj in mySelectionSet)
                {

               if (acadObj.ObjectName == "AcDbPolyline")
                    {
                        AcadLWPolyline polyline = (AcadLWPolyline)acadObj;
                        double[] polylineCoords = (double[])polyline.Coordinates;
                        
                    }
                    else if (acadObj.ObjectName == "AcDb2dPolyline")
                    {
                        //**********  how to get the coordiates of  this  type
                    }



}

Re: how to get the coordinates of acdb2dpolyline

_gile — Tue, 01 Aug 2017 04:45:18 GMT

Hi,

The AcDb2dPolyline also have a Coordinates property which return an array of type: [x0, y0, z0, x1, y1, z1, x2, y2, z2, ...]

Re: how to get the coordinates of acdb2dpolyline

Anonymous — Tue, 01 Aug 2017 05:18:19 GMT

how to get the coordinates? by c#

Re: how to get the coordinates of acdb2dpolyline

ActivistInvestor — Tue, 01 Aug 2017 09:10:26 GMT

@Anonymous wrote:

how to get the coordinates of acdb2dpolyline? I setup a project with C# and "com", the code like this

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Autodesk.AutoCAD.Interop;
using Autodesk.AutoCAD.Interop.Common;
.......

foreach (AcadObject acadObj in mySelectionSet)
                {

               if (acadObj.ObjectName == "AcDbPolyline")
                    {
                        AcadLWPolyline polyline = (AcadLWPolyline)acadObj;
                        double[] polylineCoords = (double[])polyline.Coordinates;
                        
                    }
                    else if (acadObj.ObjectName == "AcDb2dPolyline")
                    {
                        //**********  how to get the coordiates of  this  type
                    }



}

You can cast the AcadObject to an AcadPolyline and read its Coordinates property the same way you do with AcadLWPolyline.

Re: how to get the coordinates of acdb2dpolyline

Anonymous — Wed, 02 Aug 2017 00:38:46 GMT

thank you ,I set the code like this

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Autodesk.AutoCAD.Interop;
using Autodesk.AutoCAD.Interop.Common;
.......

foreach (AcadObject acadObj in mySelectionSet)
                {

               if (acadObj.ObjectName == "AcDbPolyline")
                    {
                        AcadLWPolyline polyline = (AcadLWPolyline)acadObj;
                        double[] polylineCoords = (double[])polyline.Coordinates;
                        
                    }
                    else if (acadObj.ObjectName == "AcDb2dPolyline")
                    {
                        //**********  how to get the coordiates of  this  type
                        AcadPolyline line=(AcadPolyline)acadObj;
                       double[]  polylineCoords=(double[])line.Coordinates;
                       
                    }



}

THE polylineCoords.length is 0; I can't get coordinates with this method!!! is there other way?

Re: how to get the coordinates of acdb2dpolyline

ActivistInvestor — Wed, 02 Aug 2017 04:14:37 GMT

@Anonymous wrote:
THE polylineCoords.length is 0; I can't get coordinates with this method!!! is there other way?

The Coordinates property works for me (tested from LISP). I'm not sure what it could be.

Re: how to get the coordinates of acdb2dpolyline

Anonymous — Wed, 02 Aug 2017 05:19:22 GMT

Maybe it works in lisp But not work in C#+ AutoCAD com

Re: how to get the coordinates of acdb2dpolyline

ActivistInvestor — Wed, 02 Aug 2017 18:35:00 GMT

@Anonymous wrote:
Maybe it works in lisp But not work in C#+ AutoCAD com

You should try testing it with LISP or VBA to rule out a problem with the COM API on that system.

Re: how to get the coordinates of acdb2dpolyline

Anonymous — Thu, 03 Aug 2017 00:38:39 GMT

i am sure that it work fine with LISP ,But not work with COM. this data type is not support in com api?

can you tell me the email of AutoCAD technology support

Re: how to get the coordinates of acdb2dpolyline

_gile — Thu, 03 Aug 2017 05:09:34 GMT

Hi,

AutoCAD COM API works the same whatever the language you use (Visual LISP, VBA, C#, ...).

This works for me:

if (acadObj.ObjectName == "AcDb2dPolyline")
{
    AcadPolyline polyline2d = (AcadPolyline)acadObj;
    double[] polylineCoords = (double[])polyline2d.Coordinates;
}

Re: how to get the coordinates of acdb2dpolyline

Anonymous — Thu, 03 Aug 2017 06:01:56 GMT

HI _gile,

I use the C# language and AutoCAD 2010 COM API,the same code does't work !

can you send me the project ? or I send you the dwg file.

my Email is yyjpz2007@163.com

Re: how to get the coordinates of acdb2dpolyline

ActivistInvestor — Thu, 03 Aug 2017 17:21:30 GMT

@Anonymous wrote:
HI _gile,
I use the C# language and AutoCAD 2010 COM API,the same code does't work !
can you send me the project ? or I send you the dwg file.
my Email is yyjpz2007@163.com

Again, the problem is local (there may be problems with COM on that system).

The first step is to verify that by using another language (LISP or VBA) and see if the problem also occurs there.

Re: how to get the coordinates of acdb2dpolyline

hennadii_k — Mon, 17 Apr 2023 17:39:25 GMT

@Anonymous
The following solution works for me

Polyline2d simplePolyline2D = (Polyline2d)acdb2dpolyline.GetTransformedCopy(Matrix3d.Scaling(1, new Point3d(0,0,0))); simplePolyline2D.ConvertToPolyType(Poly2dType.SimplePoly); foreach (Vertex2d v in simplePolyline2D) { v.Position; // that is a Point3D }

The reason of use the GetTransformedCopy() method is just to avoid errors in AutoCAD during ConvertToPolyType() execution if you get this entity in read mode. So, you are working with a copy of the object and do not directly edit it.