select last entry in autocad and get elevation (Z)
To add one more "does it matter" question:
Does it matter in what World-or-User Coordinate System the Polyline is drawn, and whether that is the current Coordinate System at the time that you want to get its elevation? [If you are talking only and always about things drawn in the WCS, never mind the question.]
@narasimharaoarza0211 wrote:
.... select last entry in autocad drawing ( Polyline ) and get the " Z " value of the polyline.
Come to think of it....
Under what circumstances are you selecting the last entry? If you want to know immediately after drawing it, without having done anything to it or changed any settings, then a simple (getvar 'elevation) will tell you where you just drew it, without the need to actually select it. But if you have Moved it vertically since drawing it, that's a different situation [but perhaps still simple, depending on the answers to questions posed so far].
Rectangles elevation set in command RECTANGLE is not the value of system variable elevation.
To get elevation of the last rectangle created you can use something like:
(defun rectElev( / eo)
(cond
((and
(setq eo (vlax-ename->vla-object (entlast)))
(vlax-property-available-p eo 'elevation)
)
(vlax-get eo 'elevation)
)
)
)
Miljenko Hatlak
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@narasimharaoarza0211 wrote:
....
Specify start point: 0,0,600....
Specify next point or [Arc/Halfwidth/Length/Undo/Width]: @10000,10000,6002D point or option keyword required.
....
PLINE won't accept an XYZ point for subsequent vertices [it will for the start point], because they can't have varying elevation. Give it @10000,10000 without the ,600, and it will be at that elevation. Then at the end, don't look for the 'elevation System Variable, but for the elevation of the Polyline just drawn:
(getpropertyvalue (entlast) "ELEVATION")
or
(cdr (assoc 38 (entget (entlast))))
@narasimharaoarza0211 wrote:
OK , Than you very much
You're welcome. I'm realizing that my advice in Message 5 was based on the assumption that you would have drawn the Polyline at the current Elevation System Variable setting. That advice is no longer valid if you drew it with a non-zero Z coordinate specified in the start point, as in Message 8. That forces it to a different elevation from the current Elevation System Variable setting. That is why I had to suggest looking at something different in Message 9 from what I had suggested in Message 5.
