Hi All,
My attached drawing have many dimension with some of that have extension line is overlapped with other objects.
Anyone have a lisp routine below:
- Detect all dimension's extension line is overlapped
- Move those point to near dimension's base line such as 100 mm
Thanks all in advance for any support.
P/S: Please write some simple comment in lisp if you can because I am learning basic of Lisp.
Regards,
HAI
Autocad has a built-in function that breaks crossing dimensions: DIMBREAK. It even allows you to select multiple dimensions.
If your extensions lines are too long, you can use a fixed length.
Or... if you want to get better in your programming skills, then actually start programming! Write your own routine!
Don't bother moving the definition points, which will lose the connection to keep the Dimensions correct if you Stretch the drawing content. Just suppress the extension lines. If you know which one is extension line 1 and which is 2, you can turn off the one you want suppressed in the Properties palette:
Just change one or both of those to Off.
BUT better yet -- since I rarely know which is 1 and which is 2, rather than try switching one and see whether I chose the right one, I wrote DimExtLineToggle.lsp, with its DET command, available >here<. It's a true toggle -- it turns the extension line closer to where you pick [whichever that is] off if it's on, and vice versa. See the description there, and comments in the code. It does require you to pick each one -- having a routine detect such conditions seems a near-impossible task, but maybe there's some way to do it.
For drawing Dimensions with one or both extension lines suppressed, read about the DIMSE1 and DIMSE2 System Variables. Some people set up different Dimension Styles with one, the other, and both suppressed.
Here you have my test code for two functions CDL and CDLI. Function cdl ask for dimension line object to be selected and then ask for a cutting edge to align end points of all dimension line objects selected. Function CDLI works in a same manner but changes only internal extesion lines from selected and those on the total left and rigth side (first and last) do not change. By combining those two commands you can acheive what you looking for. It is best used on horizontal and vertical dimension lines, while aligned may create an error. It doesn't make filtering for other types of dimension object i.e. angular so select object with care.
Miljenko Hatlak
@Anonymous wrote:
…. I need to find a good solution to detect the overlaps of dimensions and other lines. There are not only 1 case but also some different case of dims and line’s position.
I know it is not easy ....
That's right -- it will not be easy. Presumably a routine would find all Dimensions that have extension lines [easy enough, and it could ignore those without, such as Radius & Diameter]. The hard part would be determining overlaps of the extension lines with other things.
The entity data for a linear Dimension includes the definition points and only one of the arrowhead ends of the dimension line where it meets an extension line. That location at the other end would need to be calculated [you can see that done in the DET code]. The extension-line offset from the definition points and extension past the dimension line are obtainable from the Dimension Style. So with all that, it could calculate the two ends of the two extension lines.
To find overlaps of those with other things, presumably it would use (ssget) with a Fence selection, and remove the Dimension itself from the resulting selection set. Presumably it could also ignore other Dimensions with coinciding extension lines. If finding anything else means it should suppress that extension line, that shouldn't be too hard. But I assume you wouldn't always want that, if there could be things that partially overlap. I can imagine situations in which moving the definition point could be what's needed, and others in which it's not. And any evaluation would be different if the overlapping thing is a Line than if it's part of a Polyline, or a piece of a Block, or....
A further complication is that the (ssget) with Fence selection would also find things that merely cross the extension line, but don't lie along it, which presumably would not require altering the Dimension. That's another evaluation that could be quite complex depending on entity types. But I can't think of any other way to find overlapping things.
It's a daunting task, if achievable at all.
@Anonymous wrote:It is not working for me. Can you take a screenshot of result because I do not understand about select 2 point for cutting.
This are either pick points on edges of the wall, points on extension lines, or any line you want to align edges off dimension object. I created it this way for simplicity and faster work.
Here is example for using command CDL to align all extension lines to wall line.
a) When asked to select dimension objects:
b) when asked to pick first point on cutting edge ( it is a rectangle end point)
c) when asked to pick second point on cutting edge we select point on the right side, but it can be any point along that line, it just have to be horizontal to first one
And after selection of points along a line all extensions align to desired line. Same principle works for verticals.
And here is a example for using command CDLI. Here we want to shorten (cut) extension line at imaginary line created by picking two points at dimensions it intersect with, but won't to align only internal points, and leave edge points untouched (13 14).
a) Here we select only outer dimension object.
We pick a first point approximately in the middle of segment, or how you like it.
And a second point at other side at approximately same horizontal position. If you want to be precise you may draw a helping line or a rectangle. Mouse cross is at position of a shortened dimensions edge line(s).
Miljenko Hatlak
Can you assure that automatic operation want delete what's not necessary. If you want me to put automation in a code then please tell me how you want cuts to be done i.e at line of previous dim object. Anyway as @Kent1Cooper says its really hard to put into account all variables. Personally I always prefer to have control over what automation code is doing. Also, update some sample drawing for easier work (version 2014).
Miljenko Hatlak
I have some idea on my mind and will try to implement, but please provide some sample drawings (ver 2014). I work in a industry where precise detailing is not so often. Have to go now but will try to make some code later today.
Miljenko Hatlak
Thank for quick reply hak_vz,
I know this problem is not easy for me. But I think it can be done with some pro supporter. Just more a little patient.
As kent1cooper's comment, he understood what I want to do. And it is just difficult when must to detect dim's ext line overlap with various object as polyline, part of blocks or something. I also realize that, so my drawing have no any blocks, and I will explode polyline to lines.
If you can, please read my comment to kent1cooper, I wrote my idea clearly and I think it can be done by lisp or Visual LISP. Actually this routine is same with detect and remove overlapped line to line (like Autodesk's overkill command) which Lee-Mac coded before. But this time is overlaps of dim's ext line to lines object.
I just understand clearly how to control XYZ, AlignDimension and work well with loops. I think it can be solved.
Below image is what I need to do in LISP. Thank for your time when read and help me.
