Bpoly missing vertices

[Anonymous]

I was using Autocad Architecture 2012 updated it to 2015 and now to 2016 and am having an issues with missing vertices when using the Bpoly or Boundary command.  I have looked to see if there is some kind of gap tolerance for using this command and have found nothing to help me.  It was working great up until the 2015 version and than I thought maybe it was fixed in 2016, but I still have the same issue. I have attached an example file.

[Volker_C]

Hi Jody,

I'm checking into this issue. I'll get back to you as soon as I've made some inquiries.

Thanks for your patience.

Volker

[Volker_C]

Hi,

I appreciate you bringing this to our attention. I've escalated the issue to our development team, unfortunately I don't have a work around at this time, other than to use the Pick Points option in AutoCAD 2015 and 2016 based applications. Once I have an update I will post to this thread.

Thanks again, Cheers!

Volker

[David_W_Koch]

I was able to reproduce your issue, copying the polyline on the Gross Area layer to another drawing, started with the out-of-the-box 2016 Aec Model (Imperial Stb).dwt template.  I also reproduced a similar issue on a polyline of my own creation.

In my experimentation, I found that the relative zoom level appears to affect the "accuracy" of the boundary with regard to picking up or ignoring relatively small offsets.  I was able to get an accurate boundary polyline by zooming in to one small portion of the bounding polyline.  I found this on my polyline first, which only had a few small offsets all within a small area on one side.  So I then tried the same on yours, fearing that the small offsets that would be offscreen when selecting the point would still be missed, but that was not the case.  So zooming in works great if the boundary is just one polyline.  (In which case, COPY would work just as well as BPOLY.)  Once I added the polylines on layer 0, the zoom in option did not produce the correct boundary around those polylines on layer 0.  In this case, it may be easier to zoom in and get all the 1/2" offsets right, and then edit the polyline to pick up the correct boundary around the layer 0 polylines.  (Or create one zoomed in, and one zoomed out, and then edit the two polylines, saving the bits each does correctly, and then PEDITing them together.)

I looked for a system variable that might specify a size below which BPOLY should ignore the geometry, but did not find one.  HPGAPTOL allows you to specify a maximum gap tolerance, but appears only to work for BHATCH, not BPOLY.  And that only deals with incomplete boundaries, not complete boundaries with small offsets relative to the overall size of the bounary area.

[Volker_C]

Thanks for that feedback David, I've added that to my report.

Best regards,

Volker

[Anonymous]

I know I may be a little late, but I was having the same problem and I am 2018. If you open boundary up and click "new" it will ask you to pick the sets you would like to use (this also allows you to tell autocad to ignore anything within the boundary). Zoom in close to a few small vertices and that should get the accuracy you need. If you use "current view port" on the boundary function and zoom in, it will not boundary anything off the screen and most of the time gives you an error message.

[Anonymous]

I know you're use to using the bpoly command but I have another workaround. If you use generate space, the space will pick up those small 1/2" offsets. Make sure objects have the bounday space set to yes. The maximum gap size and maximum automatic adjacency need to be set to 0". Once space is generated, pick the space and right click to create polyline. The created polyline will have those small 1/2" offsets. Like David, I thought there might be a variable but didn't find any.  I know that's extra work but at least it picks those small offsets.

Todd