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Delete lines underneath a certain layer.

luis-pl — Mon, 11 Mar 2019 15:56:20 GMT

Hello everybody.

I have a problem, I searched the forums but could not find a solution.

I had a 3D model in Autocad that I made a 2D section of it. I got the Section Cut geometry (Red) and the Background geometry (Blue) in separate layers. So far so good. The problem is that underneath the Section lines, I also have Background lines, of the whole section. The command Overkill is not useful here to eliminate these duplicate lines, because if I use it, then Autocad will randomly select both Section and Background lines to remain.

What I need is to use some kind of Overkill that gives priority to Section lines and eliminates every line underneath that layer. I have tried selecting all the Section lines and moving them to the top order and then do Overkill but it doesn't work either

I hope I could make myself clear on this.

I attached two images, Red lines are on top of the Blue lines, and I want to subtract all Blue parts that are underneath the Red lines.

Thank you so much.

Re: Delete lines underneath a certain layer.

pendean — Mon, 11 Mar 2019 17:10:39 GMT

@luis-pl wrote:

I had a 3D model in Autocad that I made a 2D section of it.

Any reason you are unable to filter through the "red" objects (SELECTSIMILAR or QSELECT commands), temporarily hide them or move them to another layer, then erase all the blues underneath?

Re: Delete lines underneath a certain layer.

maxim_k — Mon, 11 Mar 2019 20:15:23 GMT

Hi Lois,

You still can use OVERKILL command, but activate Layers option:

If you will move lines you want to leave in the drawing to the top (Draw Order -> Bring to front), then the style of topmost object will be used and you underneath objects will be removed.

Re: Delete lines underneath a certain layer.

luis-pl — Tue, 12 Mar 2019 03:04:52 GMT

@pendean : My goal is to keep part of the Blue lines except the parts that overlay with Red. That method won't do, but thank you for the trouble.

@maxim_k wrote:

Hi Lois,

You still can use OVERKILL command, but activate Layers option:

If you will move lines you want to leave in the drawing to the top (Draw Order -> Bring to front), then the style of topmost object will be used and you underneath objects will be removed.

@maxim_k : I have tried that method, selecting Layers checkbox, but the Blue lines did not disappear as wished. Maybe I am having some bugs. Meanwhile, I have completed what I wanted manually, by redrawing over in a new layer. Very time consuming but it was the only way. I will try once more that method another day and see if it works, as it's a great command in useful situation.

Thank you

Re: Delete lines underneath a certain layer.

Anonymous — Fri, 10 Jan 2020 12:29:31 GMT

Hello everyone, I'm new to the forum. I have the same problem. Basically I have an export from a 3D program that has lines of hidden parts subjected to visible edges. I would like to be able to delete only the lines of the layer of the hidden parts that in theory I shouldn't see. With the overkill command while moving the visible lines in the foreground and moving the hidden ones in the background, the cancellation is random. The result is that some lines that should be continuous because of visible edges are instead dashed as well as being moved to the wrong layer.

Re: Delete lines underneath a certain layer.

maxim_k — Fri, 10 Jan 2020 14:47:37 GMT

Welcome to Autodesk Forums!

Hi Riccardo,
Do you already have visible and invisible lines on different layers? If yes, then you can temporarily turn off layer with visible lines and delete objects from layer with invisible lines.