Insert line

I have asked this question a couple of times before but I did get
nowhere.
Maybe I am too stupid or too old or both. Or I did not properly
describe the problem .
Here is my problem:

I want to insert lines in a drawing "start snap - end snap".
I wand to be able to trim, stretch champher etc those lines as normal
lines.
So far no problem.

At the end of the ride I want to extract the length of each line with
the attiribute extraction feature.

I have tried with blocks (the block is a line of 1 unit long). I can
insert - rotate - stretch etc and extract the length but I can not
modify (stretch, trim, join, chamfer...) these lines ones they have
been inserted.

I am using Acad 2006 Mechanical. An average drawing contains about 100
- 200 different blocks and maybe 80 - 100 lines as per above
description.

Thanks,
Daniel

 

If it has to have an attribute, it has to be a block. You cannot do as you
say to a block but you can rescale a block until it's length is whatever you
need it to be. The result should be the same as if you had edited line,
although the work required may be greater. That's the price you pay for
working with blocks.

You may need some 'constructive geometry' to do this accurately. After
rescaling the block you'll probably want a function to update the length
attribute.

At this end, we end up having to accept your assumptions about the efficacy
of working this way, I'm afraid.

 

................
just use lines ( and arcs if you have rounded corners ) and use the
ssget function to sum their lengths at the end of your ride. is this
accumlation what you are after?
.......................

Exactly. I am not very familiar with AutoLisp but I tried (setq
ss(ssget)).... and than (sslength ss).... This returned the number of
lines not the length in that part of the drawing.
If I just could get the total length than this would save my day.
Thank you for helping me out... maybe I am not too old after all.

Daniel.

 

Paul Turvill has a lisp to give the total length of selected lines on his
website.

 

Thanks a lot. I found exactly what I needed.