Trim Inside Block

[Anonymous]

If anyone cane help me to get lisp to trim lines or polylines inside block without edit block itself, it will be appreciated.

[ВeekeeCZ]

LISP does not do magic. These lines either are part of a block or are not. So either you change the block or create a copy or block or just copy of the line (ncopy)... so what is it.

[john.uhden]

Trim to what?

Block definitions don't necessarily contain cutting edges around their perimeter.

But if you used the block editor and drew a temporary polyline to represent the cutting edge, then we could help you write some code to accomplish what you want.  How much AutoLisp experience do you have?

If none, then I suggest that when using the block editor that you Trim Fence.  It's the easiest way because you probably don't want to have to select each object to trim separately.

[Sea-Haven]

Post a image or dwg showing what you want, people are guessing what you want.

[Anonymous]

Thanks Dears

Just I need to trim line in block by yellow line without edit block.

[Anonymous]

Usually you give me great lisps, many many thanks😍 @ВeekeeCZ 

[hak_vz]

For what you need command XCLIP will do the work.

[Anonymous]

Yes, but I need to trim it not hid only.

[hak_vz]

 In that case, as advised above, edit your block

[ВeekeeCZ · Accepted solution]

Just be aware that this will modify ALL instances of this block (say valve) in your drawing. 

(defun c:TrimRef ()

  (if (ssget "_I" '((0 . "INSERT")))
    (command "_.-REFEDIT" "_Ok" "_All" "_No")
    (command "_.-REFEDIT" pause "_Ok" "_All" "_No"))
  (initcommandversion)
  (command-s "_.TRIM")
  (command "_.REFCLOSE" "_Save")
  (princ)
  )

[Anonymous]

I was sure you would solve it, many thanks. 

[Sea-Haven]

If you want to do this often then make the block a dynamic block with the end points of the vertical line set as a variable distance then can change the length to match the yellow line.

Ok 1st thing reset block insert pt to be central point. Then can set distance easy. Pick block pick line get perp distance and reset the line length, all done.

[traiduong014969]

DEAR SIR,

I tried your lisp code. It works perfectly with bock that create manual. However, with my block export automatic. I do not trim them. You can tell me the reason and update your code to it. I attached an example DWG file.

 Thank you !

[ВeekeeCZ]

Sorry, no experience with 3D blocks.

If the blocks being anonymous is the only issue, you can try to convert them to non-anonymous.

[traiduong014969]

Yes, it works so good, thank you for reply