unexpected results convert 2d to 3d polyline

[sybold]

Converting a 2d polyline to 3d polyline, the 3dpolyline is created above the 2d polyline.

Watch the screencast!

 

[AllenJessup]

Can you post a drawing with that polyline in it? That way we can investigate the PL and test it.

[sybold]

sure, attached the file from the screencast

[AllenJessup]

The polylines are not parallel to the WCS. Flatten them and it will work as expected. See below. However. When I list one of the PLs. I see an elevation of 85913.7119. So there is definitely something strange about it.

[sybold]

when flattend the elevations will be gone, if it only works on planar objects the function is useless, the conversion has no point to still have a flat result but a other entity.

the whole point is that the line would stay in place(3dspace), only to be converted to a 3d polyline.

A work around is to divide the 2d polyline and connect the points with a new 3d polyline, also knows as the long way.

[AllenJessup]

You could copy the PLs and convert one to 3D. Then snap that to the original to obtain the elevations. Bottom line is that the command wasn't written to work with non-planar 2D polylines. If you try and convert them to Featurelines. You'll get an error that they aren't planar.

[ilia.borisov]

..., the conversion has no point to still have a flat result but a other entity.

The point of conversion is to get one line with different elevation on each vertex(if you want) not one line with only one elevation, and if you noticed when you convert to 3d the straight segment of you line followed the direction in 3d space that you gave to the line only the curve part became planar to UCS.

[sybold]

the generate 3d polyline is not planar too....

red line is the generated 3d line
green the original 2d line
blue the expected 3d line