Lisp that trims a line when inserting a block from tool palette

[ademontis]

Hi everybody, I am a CAD drafter with a need of having a LSP that breaks a polyline when inserting a Block. The goal is, having a polyline (e.g.: a pipe routing) and adding the block, that it cuts the polyline in the intersection point and deletes the part of line covered by the block.

I have tried the AutoBlockBreak LSP by Lee Mac and it is very useful except the case I need to get blocks from a Tool Palette instead of browsing from a folder.

Is there a way to easily modify the LSP? Please notice that I have no LSP programming experience.

 

Otherwise, I had an old AutoCAD lsp that used to do the work but it doesn't do anymore on AutoCAD 2008... but I can't figure out how to modify it.

I attach it here for quick reference (PIINSYM command).

 

Thanks in advance,

Cheers.

Alessandro Demontis

Rome

P&ID.txt

[lpseifert]

Have a look here

http://www.cadtutor.net/forum/showthread.php?53423-self-trimming-block&highlight=wipeout

[ademontis]

Have a look here

http://www.cadtutor.net/forum/showthread.php?53423-self-trimming-block&highlight=wipeout

 

Thank you lp but the wipeout procedure is not suitable for my problem for two main reasons:

- I am not allowed to redifine the blocks (that already exist) in order to add the wipeout polygon

- i need the line to be trimmed non only for a graphical result but because of a next step where lines are used to represent attributes or moved. Imagine a plant pipe... i add the valve, or a pump, or an instrument as a block on the pipe and the polyline needs to be truncaed because after adding the block i have to be able to select the two pieces of line and move them on different layers or give them different global width values.

 

Moreover i need to be able to use the blocks from a previously created toolpalette.

 

This is an image of what I mean: the line above is the 'start situation' and the other one is the goal i would need to achieve.