entget coordinates extraction has no precision - all end ".0"

[robert.webster247M7]

Hello. i am using Autocad 2023 and am trying to write a routine that extracts X,Y & Z coordinates from a 3D polyline.

The x & y coordinates have no precision, the z is to 3 dp (for level purposes, this is acceptable). eg (10 260974.0 824336.0 255.344). 

I changed the units from mm to m and tried again without avail.

Has anyone else have this cause issues?

thanks

[pbejse]

What method did you use to extract the coordinates? I cannnot seem to replicate that result on AutoCAD 2023

[Moshe-A]

@robert.webster247M7  hi,

Sounds like you are using convert format function [like (rtos)] check the XYZ value before the convertion

Moshe

[robert.webster247M7]

Hi. Thanks for the reply.
I found some code online
"(setq obj (vlax-ename->vla-object (car (entsel "\nSelect a Polyline: "))))
(setq poly1 (vlax-get obj 'Coordinates))"
I have also checked manually at command prompt with the entget etc commands

[robert.webster247M7]

Hi. Thanks for your reply.
I borrowed some code that I found on line
" (setq obj (vlax-ename->vla-object (car (entsel "\nSelect a Polyline: "))))
(setq poly1 (vlax-get obj 'Coordinates))"

But I have also checked manually at the command prompt using entget etc.

[pbejse]

Maybe your coordinate is like this --> X is at 11.030 Y at 13.024 Z as 25.366 

with Luprec 1 it will show the same as you have 11.0 13.0 25.366

Try changing LUPREC variable to a higher number, say 3 then you will get to  "see" the other values

(10 11.03 13.024 25.366)

HTH

[robert.webster247M7]

Hello. I've tried Luprec, which was initially 4, on 3, 8 (max) and 0 (min). it made no difference. I believe the problem lies in the no of digits it outputs. I scaled the plline by 1000 and achieved 3dp for x, y & z.

[Moshe-A]

@robert.webster247M7 ,

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@robert.webster247M7 wrote:
Hi. Thanks for your reply.
I borrowed some code that I found on line
" (setq obj (vlax-ename->vla-object (car (entsel "\nSelect a Polyline: "))))
(setq poly1 (vlax-get obj 'Coordinates))"

But I have also checked manually at the command prompt using entget etc.

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create a new free polyline with snap off and report what is the result.

[pbejse]

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@robert.webster247M7 wrote:
Hello. I've tried Luprec, which was initially 4, on 3, 8 (max) and 0 (min). it made no difference. I believe the problem lies in the no of digits it outputs. I scaled the plline by 1000 and achieved 3dp for x, y & z.

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I like to get my hands on that drawing, are you saying the same drawing when opened on a lower version doent have that issue? perhaps a "Reset Settings to Default" is in order.

Anyway, let us know hot it goes

[ВeekeeCZ]

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@robert.webster247M7 wrote:

Hello. i am using Autocad 2023 and am trying to write a routine that extracts X,Y & Z coordinates from a 3D polyline.

The x & y coordinates have no precision, the z is to 3 dp (for level purposes, this is acceptable). eg (10 260974.0 824336.0 255.344). 

I changed the units from mm to m and tried again without avail.

Has anyone else have this cause issues?

thanks

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I too have the same. (10 -650057.0 -1.15296e+06 0.0). 

That's no issue. It is always like that, it shows just 6 digits. It's just a visual thing... the real precision is always 16 digits. Just convert it into a string and you'll see more. Use eg. this: (rtos (cadr (assoc 10 (entget (car (entsel))))) 2 12)

[robert.webster247M7]

Attached is the 3dpolyline in dwg. it is showing the first vertice to 4dp in properties.

The start portion of the output at the bottom shows the output from the lisp

[ВeekeeCZ · Accepted solution]

Here is your new line to use.

(mapcar '(lambda (x) (rtos x 2 12)) (vlax-get (vlax-ename->vla-object (car (entsel "\nSelect a Polyline: "))) 'Coordinates))

[robert.webster247M7]

Thank you very much. that is brilliant

[ВeekeeCZ]

Rather read my first reply, that's the real solution. 

[pbejse]

RTOS ?I did not even consider that as an issue because that is what @Moshe-A  suggested at post # 3  😂 

I thought its more sinister than that

[robert.webster247M7]

A big thank you  to everyone, your help and time, much appreciated!! 

[pbejse]

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@robert.webster247M7 wrote:

A big thank you  to everyone, your help and time, much appreciated!! 

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You are welcome, just know that you can trust the API regardless what you see or NOT see.

Cheers