Osnap

Hello All!!

I'm doing "as built" revision in a great number of electrical drawings
and Quadrant osnap isn't working...is the only who doesn't work.
I load other drawing who I did and all oject osnap worked fine,
then I guess in drawings I'm working, some system variable was
set wrong...
Will you please give me some hint were look for.
Thanks in advance.

Jo_ar

 

What is the Quadrant Osnap not working on, Circles, Elipses? Are you
using it as a running snap or as a specific snap on an object?

 

In my drawings only have circles...
Normaly I use snap, but I've tried the Quadrant osnap turning snap off
and continue not working.

Jo_ar

 

If the circle's extrusion direction z value to the current ucs is -1.00
quadrant osnaps are not picked up.

Do a "list" on the objects and see what it says.

--
Patrick Hughes

Engineered Design Solutions
http://www.engds.com

Chronos: Time Logging for AutoCAD
visit http://www.engds.com/Products/Chronos/Chronos.html

 

I just tried that an I got a QUAD.

When you say "extrusion...-1" do you mean that it has thickness of that
value?

 

No, what I am referring to is when a circle is drawn in let's say the world
coordinate system it will have an extrusion direction of "0,0,0" and when
you perform a "list" command on that circle the extrusion direction will not
display. Now if you rotate the ucs around the X or Yaxis 180 degrees when
you do a "list" command you will get a returned value of "0,0,-1" extrusion
direction.

I'm still on r14 so maybe a more recent version behaves differently.

--
Patrick Hughes

Engineered Design Solutions
http://www.engds.com

Chronos: Time Logging for AutoCAD
visit http://www.engds.com/Products/Chronos/Chronos.html

 

Oh. I got it. You're right. That kills the QUAD snap. Strange.

 

You mean an extrusion direction of "0,0,1", right? ;-)


Juergen

 

Hello Patrick!!!

You were right in part, but I didn't give all information, circle who
can't osnap
is included in a block...I did the list with it and is scaled
1,1,0.1...
Now my problem is how to solve this problem...I redefine the block, but
not
solved.

Jo_ar

 

Rather than redefining the block, if the 0.1 z scale is irrelevent do a
ddmodify on it and rescale the z value to the same x and y scale.
But I assume you have many blocks in your drawing.

--
Patrick Hughes

Engineered Design Solutions
http://www.engds.com

Chronos: Time Logging for AutoCAD
visit http://www.engds.com/Products/Chronos/Chronos.html

 

Yes, that's what I meant (good catch) dxf code 210

--
Patrick Hughes

Engineered Design Solutions
http://www.engds.com

Chronos: Time Logging for AutoCAD
visit http://www.engds.com/Products/Chronos/Chronos.html

 

You are right Patrick, there are many of those blocks in each page, who
were scaled in these mad way when inserted...then I guess I'll continue
working without quad osnap...
Thanks for your help.

Jo_ar

 

You can mirror the block, that would set your extrusiom back to normal.

I think rotating your UCS about the 'Y' axis 180º, even if its only
temporary, should allow you to get at your quadrants, and once you're
done put it back.

Polylines may cause a big problem using this method though.

 

If your not worried about the rest of the block data try this
if you are - run it again after you're done.

(defun c:flipblock ( / myss counter a b c)
(vl-load-com)
(setq myss (ssget "X" '((0 . "INSERT") (2 . "your block name here"))))
(setq counter 0)
(while (< counter (sslength myss))
(setq a (vlax-ename->vla-object (ssname myss counter)))
(setq b (vlax-variant-value (vla-get-insertionpoint a)))
(setq c (vlax-safearray->list b))
(command "mirror" (ssname myss counter) "" c "@1<90" "y")
(setq counter (1+ counter))
)
)

 

Hello Rick!!!
Thanks for your answer and your routine, but my problem is different,
circles are included in a block who was inserted scaled x=1, y=1, z=0..1
I don't know how to change the z scale automaticly, because there are
too much of those blocks in each page of drawing.

Jo_ar

 

That's a different question and one that you haven't asked, "How can I
change the Z-scale factor of a large number of blocks, while leaving the X-
and Y-scale at 1, so that I can snap to quadrants of circles in the blocks?"
That's a fairly short piece of lisp

Save this as a lisp, load it, and type "z1" at the command prompt:

(defun c:z1 (/ item counter ent item ss sslen)
(prompt "Z1.LSP will change block Z-scales to 0.")
(setq ss (ssget))
(SETQ SSLEN (SSLENGTH SS))
(setq counter (1- (sslength ss)))
(while (>= counter 0)
(setq item (ssname ss counter))
(setq ent (entget item))
(if (assoc 43 ent)
(progn
(setq ent (subst (cons 43 1) (assoc 43 ent) ent))
(entmod ent)
(setq counter (1- counter))
)
(setq counter (1- counter))
)
)
(princ)
);end of routine

Beware that if there is any z coordinate information that in these blocks
that *requires* the z scale to be 0.1 (other than insertion point) that this
information will be changed by this routine....
--


MichaelB
www.michaelbulatovich.ca

Hello Rick!!!
Thanks for your answer and your routine, but my problem is different,
circles are included in a block who was inserted scaled x=1, y=1, z=0.1
I don't know how to change the z scale automaticly, because there are
too much of those blocks in each page of drawing.

Jo_ar

 

You are right Patrick, there are many of those blocks in each page, who

I've just thought of the reason why a block would be scaled in such a
way.
I've done this with steel sections, and maybe your blocks are
representing round steel bars (I don't know)? You can make use of the
scale foctor programatically by multiplying the weight of the section
times the length (z-scale-factor).

Let's say we have a 2" sized round bar which has an area of 3.1416 sq.
in.
now lets say that the pounds per foot of that section is
10.690 lbs./12 in. = .890833 lbs. per in.

Now that we have a scale factor of the 'z' we can use it as a
multiplier.
0.1 * .890833 = .0890833 lbs. and you now have a weight of your part.

Now you have to think of how a prediction of shipping costs is figured.

by weight (usually) right?

Now if each of these blocks have a z factor set to the actual size of
the part, then a program can be written to easily figure the cost of
each item, or the total weight of shipment for an assembled product,
etc...

If you find that this was the reason for creating such a block, and it
is being done in house, you may want to encourage those who are
creeating such things to use invisible attributes to accomplish the
same purpose. It may be a cylinder(3D) though, this may not be very
apparent if the scale factor is set as low as 0.1 units.

 

Thanks a lot Michael...I only changed the step who get entities
to get only blocks involved, including part of Rick's routine:
(setq ss (ssget "X" '((0 . "INSERT") (2 . "your block name here"))))
and worked fine...
Thanks again.

Jo_ar

 

Even better. So the snaps work?

 

Yes, Quad osnap back to work fine...
Thanks Michael and all persons who help me.

Jo_ar