AECOBJEXPLODE = Flattened/Zero Elevation on Objects

[jbalaneski]

Has anyone had the issue with the AECOBJEXPLODE function (which is also run when you export a C3D dwg to a lower version) also flattening the objects to elevation zero (0) when saving/exporting it down to a lower version.  I'm running 2013 & 2014 and have noticed this issue.  I never noticed it, or had it happen with 2012.

Any help would be appreciated!

Thanks!

[rkmcswain]

Never noticed it, but I have not really paid attention to it either.
I'll be watching this thread for more answers.

[jbalaneski]

Bumping post...

[rl_jackson]

I just tested it in 2013 and It also set the units to architectural. LOL (Edit : This happens when using AECOBJEXPLODE in the drawing)

Export to ACAD does not change the units but still sends figures to 0, but point styles remain at elevations, very interesting. But I think what is happening is its exploding figures and objects to native polylines instead of 3d polylines, (Just a thought) and that's why there going to 0

[jbalaneski]

As I said...this wasn't the issue in 2010/2012. It would convert the feature lines to 3D Polylines.  I've only noticed this issue in the newer versions.  I don't know if there's a setting in my feature line style, or site settings to fix this.

[Jay_B]

We've been having similar problems with elevations being retained when using Export to AutoCad.

Some of our Microstation users noticed that the Points are all at zero elevation when receiving our files. In our Point Styles the 3D geometry point display mode has always been set to Flatten Points to Elevation. In 2012 when a dwg is exported point elevations are correct using this setting, but in 2014 the points all come in at zero elevation.

In 2014 if the 3D geometry point display mode is set to Use Point Elevation then point elevations are correct in the export to acad dwg file.

Again this wasn't the case in 2012 the flatten to elevation had no effect on the exported point elevations so not sure what changed?

As for the Survey Figures in 2014 what I'm seeing is the Survey figures are exploded to individual line segments (all at zero elev).

Exporting to dwg the 2014 Survey tutorial (Survey-5A.dwg) using the OOTB c3d Imperial settings will result survey figures being converted to zero elevation lines just as in our dwt.

Exported from our 2012.dwt they become zero elevation LW polylines, not 3d polys.

I discovered a workaround where Points Export at correct elevations and 3dpoly's of the survey figures are created @ proper elevations.

1. Set Point Style 3D geometry point display mode to Use Point Elevation in our dwt.

2. Create a new drawing & import points and figures from survey database.

3.Qselect & Explode all Survey Figures.

4. Export to Autocad.

[jbalaneski]

I am not using survey figures...I am having issues where feature lines created within a dwg file (and are used in a surface as breaklines) are getting flattened. So to above mentioned options or checks don't apply to my problem.