topic Re: AcadLWPolyline to 3dpolyline in VBA Forum

AcadLWPolyline to 3dpolyline

Anonymous — Sat, 09 Apr 2005 19:19:29 GMT

Hi,

I'm looking for direction on how to convert acadlwpolyline to a 3dpolyline.
I have a routine that draws a leach field by user dimensions by
acadlwpolylines. I now want to change or add to that routine by having the
user supply top of field elevation and have it replace or draw a new
3dpolyline
at the same vertices from the acadlwpolyline with the supplied elevation.

I want to keep the acadlwpolylines for xref into other subdivision drawings
and save the 3dpolylines out for grading later.

Should I just rework the routine for the 3dpolyline?

Thanks

John Coon

Re: AcadLWPolyline to 3dpolyline

Anonymous — Sat, 09 Apr 2005 20:41:14 GMT

Hi Jon,

AutoCAD has LW Polylines and Polylines. The one which is drawn from the PL
command or Draw menu is set by the PLINETYPE system variable.

In code you have to specifically nominate the one you are going to draw.

The LW polyline is created from a 2D coordinate array such that all even
elements are the X value and all odd elements are the Y value

The normal or 3D polyline have a 3D coordinate array such that 0, 3, 6 etc
are the X coordinate, 1, 4, 7 are the Y coordinates and 2,5,8 etc are eth Z
coordinates.

You can select a LW polyline, get its coordinates - DIM a new array with 50%
more elements and populate it with the first data plus your new data for
elevation.

--

Laurie Comerford
CADApps
www.cadapps.com.au

"John Coon" wrote in message
news:4810294@discussion.autodesk.com...
> Hi,
>
>
> I'm looking for direction on how to convert acadlwpolyline to a
3dpolyline.
> I have a routine that draws a leach field by user dimensions by
> acadlwpolylines. I now want to change or add to that routine by having
the
> user supply top of field elevation and have it replace or draw a new
> 3dpolyline
> at the same vertices from the acadlwpolyline with the supplied elevation.
>
>
> I want to keep the acadlwpolylines for xref into other subdivision
drawings
> and save the 3dpolylines out for grading later.
>
>
> Should I just rework the routine for the 3dpolyline?
>
>
> Thanks
>
>
> John Coon

Re: AcadLWPolyline to 3dpolyline

Anonymous — Sun, 10 Apr 2005 11:57:18 GMT

Laurie,

Thanks for your response, I think your suggestion of selecting the original
lwpoly to get the x,y values and pass those to a polyline array is the way
to go.
I can add this to the end of the routine instead on rewriting the entire
routine. This also will give me the 2d lwpolyline that I want to use for
xref into other plans that will be dimensioned.

as always thank you for your comments. Have a great day.

John Coon

"Laurie Comerford" wrote in message
news:4810295@discussion.autodesk.com...
> Hi Jon,
>
>
> AutoCAD has LW Polylines and Polylines. The one which is drawn from the
> PL
> command or Draw menu is set by the PLINETYPE system variable.
>
>
> In code you have to specifically nominate the one you are going to draw.
>
>
> The LW polyline is created from a 2D coordinate array such that all even
> elements are the X value and all odd elements are the Y value
>
>
> The normal or 3D polyline have a 3D coordinate array such that 0, 3, 6 etc
> are the X coordinate, 1, 4, 7 are the Y coordinates and 2,5,8 etc are eth
> Z
> coordinates.
>
>
> You can select a LW polyline, get its coordinates - DIM a new array with
> 50%
> more elements and populate it with the first data plus your new data for
> elevation.
>
>
> --
>
>
>
>
> Laurie Comerford
> CADApps
> www.cadapps.com.au
>
>
>
>
> "John Coon" wrote in message
> news:4810294@discussion.autodesk.com...
>> Hi,
>>
>>
>> I'm looking for direction on how to convert acadlwpolyline to a
> 3dpolyline.
>> I have a routine that draws a leach field by user dimensions by
>> acadlwpolylines. I now want to change or add to that routine by having
> the
>> user supply top of field elevation and have it replace or draw a new
>> 3dpolyline
>> at the same vertices from the acadlwpolyline with the supplied
>> elevation.
>>
>>
>> I want to keep the acadlwpolylines for xref into other subdivision
> drawings
>> and save the 3dpolylines out for grading later.
>>
>>
>> Should I just rework the routine for the 3dpolyline?
>>
>>
>> Thanks
>>
>>
>> John Coon

Re: AcadLWPolyline to 3dpolyline

Anonymous — Thu, 24 Jan 2019 06:41:22 GMT

This Video is about creating a macro for extracting coordinates of an AutoCAD Polyline.

Topics Discussed are
1. Extracting Coordinates of Polyline
2. Extracting length of Polyline
3. Extracting the number of vertices of a Polyline

#AutoCADPolyline #ExtractCoordinateInAutoCAD #LengthOfPolyline