Splines

[Shelley]

Can someone please help me. Sometimes, not in every drawing, but in certain drawings when we draw a spline it creates a jog or tail.

 

So when we do the command spline and click the start point then move to do the next point it will have this jog or tail at the beginning of the spline. sometimes we get it at the beginning and sometimes at the end.

 

How do I make it stop? is there a setting that I need to change? We typically work on drawings from Architect/Engineers.

[rkent]

Up until recently the first pick with Spline was to establish Tangency, so imagine the first two picks are establishing an imaginary line that the start of the spline (the next pick) will be tangent to. I used to pick my first point and then a very small ways out I would pick the second point and then begin the other picks. I don't remember but probably something similar for the end of the spline as well.

[JD Mather]

Watch the command line carefully (in 2008 ).

When finishing the spline it will ask for a start tangency and and end tangency.

These control the start and end.

 

Create a spline.

Hit F2

Alt Print Screen and copy to MS Paint

Attach dwg of your file and your image file here for suggestions.

 

as noted my rkent you can click in space (usually polar or ortho tracking) to establish your tangency or select actual geometry.

I think all of this changed a bit in 2011 or 2012.

[Shelley]

Ok,

 

I have atttached an image of what is happening and a file that is doing it.

 

two things I would like to note:

 

1) It does not do this in all cases on this drawings. so for instance if you open and see the symbol with a 30 and start the spline there it does it. if you do a spline starting at the symbol that says DACT, just below and to right, it does not do it.

2) If I dont Us an OSNAP (Endpoint or midpoint ect) it does not do it.

Image112.pdf

Example.dwg

[rkent]

You have Z coordinates on those and other symbols so adding a 3rd dimension is what is messing you up. Use FLATTEN command on a copy of the drawing to see if it can move everything to Z=0 elevation.

 

You have LT so Flatten won't work. You will need to move the objects to Z = 0 elevation manually.

 

You could try typing at the command line

Move

all

0,0,1e99

move

all

0,0,-1e99

 

The Splines may not be affected but everything else should be. Looks like some of the horns were extruded, you will have to replace those as well. The horns won't move to Z=0 using the above but it does clean it up quite a bit.

Edited September 13, 2012 by rkent
added words

[JD Mather]

Looks like rkent is on the case, but for future reference - 756k file to show problem? I would have deleted everything except the geometry you were connecting with spline so that it would be easier to download and easier to figure out what you were trying to connect.

 

Took a look to see what rkent found

[Shelley]

Thanks for you help. I can click on the device that has the text of 30 and see the Z is at 10" if I change this to 0 then it works fine. which is fine on a drawing that only one device is doing this on.

 

if I go and copy that same block from someplace else on the drawing, that has its Z at 0 and put it in the same place, the Z will change to the 10"

 

I can do the flatten thing in my copy of Full blown but if I do that it messes thing up on my drawing.

 

I did the move that rkent says to do but I changed it a little. I have to do the following

 

Move

all

0,0,1e99

0,0,0

 

Move

all

0,0,-1e99

0,0,0

 

So I have to do the command twice once to get it moved from Z 10 to Z -1e99 then I can redo the command and move it to 0

[rkent]

Are you just reporting back or did you have follow up questions? I am not sure so I am asking if you need further assistance.

 

Looking at a portion of the drawing in a sort of iso view you can see that one of the blocks is at a negative elevation while another block has been extruded (which is very, very strange.) You will have to re-do those blocks that have the extrusion in them, the others you can simply change elevations.

 

If you change to a front view you can see the ones that are below the floor plan. You can select the and move up by the amount necessary to get them back to Z=0.

 

Since you can get to regular autocad use a lisp program called superflatten.lsp and it will fix the problems in this drawing. This file comes from Joe Burke over at theswamp.org, open the file for the particulars.

SuperFlatten 1.2c.lsp

[Dadgad]

Seems like rkent and JD are getting you back on the tracks.

 

Having net even read most of the thread, I am struck by the misspelling of superintendEnt in this image,

guessing that you would rather it were spelled correctly.

[Shelley]

I think I am good. Thank you all for your help.

[SLW210]

Add this Macro to a button to flatten your drawings.

 

^C^C_UCS;;_move _all;;0,0,1e99;;_move _all;;0,0,-1e99;;_chprop;_all;;_thickness;0;;^M;