help with listing points

I have a 2000 contour drawing from a client, I want to list all end points
of all lines. when I list a line I just get the raduis point for that
segment,
Is there an easy way to list all the end points for a drawing, in R2000, or
R14.

Thanks in advance for any help
I'm sure you can figure out I'm kind of new to autocad.

 

A line DOES NOT have a radius.
It's not just a semantic distinction between lines and arcs or plines or
splines....
to AutoCAD it makes a huge difference.

You need to know what you've got in the drawing.
Typing:

(entget(car(entsel)))

at the command prompt and then picking an entity
will give you the association list of that entity. In the case of lines,
the second part of the pair starting with (10 . is the start point and
that starting with (11 . is the end point. With an arc, the (10 . is the
center,
and (50 . is the angle from the center to the start point, and (51 . is
the angle to the endpoint, and (40 . is the radius.

If you are new to the app, LISP might be a few years off,
if you're fairly normal. You will probably need luck or a favor.

 

HiHo;
Go to www.cadalyst.com and in the "get the code" section look for a program
by T. Hotchkis 12/2002 that lists end points and points to a CDF .

 

Stephen, contours are usually (not in all cases though) represented by
polylines (plines). These are made up of line and arc segements. But in
you case it sounds like the plines may have been exploded resulting in a
series of line and arc objects. Now more into your post... When you list an
arc entity in returns the Center point, radius, start and end angle and its
length... is what you require the start and end point of an arc or is it all
of the start - end points along the contour? You post is a little confusing
to me, please clarify.

Tim Badger

 

Hi

It alway's made me wonder, as it shuld be easy to start pointing to a
line segment and in a list where all points for all entities is just
put in with no order but the corrosponding entity and it's points ,to
find the entity that show the smallest distance ,and when found add
the points to a new point list so the line segments can be
reassembled.
With conturs you could even put up rules so you point out the max
distance you will accept ,so the process can stop when there are no
line segments close enough and the program proberly are jumping to the
next exploded coutour line.
P.C.
http://groups.yahoo.com/group/3d-honeycomb-open/

 

Per, interesting! I wrote a small utility (quite some time ago) that would
automatically seek out all lines, plines or arcs that could actually be
connected together from the start and end points of a selected object and
allowed the user to convert these into a pline. It also gave some other
abilities. But allowing for a search distance at the end points is an
interesting thought. The only thing that jumps out at this time, would the
user want the attaching segments to possibly have to change the x,y,z
location that would cause an angle change of the attaching segment.

Tim Badger

 

Hmmm...., what application is creating ARC segments in contour lines?
Never seen that.

 

You are absolutly right Rick. I made this fumpa because after generating
contours I automatically run a custom command to smooth out the contours and
it uses the pline fit option for certain segments and this results in
contour plines being generated using arcs and lines. My mistake.

Tim Badger