Dear ALL,
new on this forum.
Good day.
Very much appreciate if some one can share/ help for a LISP. to select an alternate object in a set of object.
1) select set of object
2) select with alternate pattern ( also for Horizontal lines)
Best regards & thank you very much,
Kenneth
Ok 1st how to use, you copy and paste to notepad, then save as what you want to call it, but save as a .lsp not txt. Then can use appload or explorer drag and drop, I have changed code a bit to run as what I provided was for say inside a bigger piece of code.
Now you asked for a selection method and that is what I provided, what you did not ask for is what your going to do once you have every second line, you need to provide the missing information, then a complete answer can be provided.
So many times here people only give a 1/2 request so suggest in future provide as much info as possible and what the final out come is. A before and after is always good.
Hi Sir/ ALL,
my apologies for not being very clear and missing information & question.
Our objective is to Select an "alternate" pattern from specified selected lines or objects.
steps:
1) from the big dwgs. of lines with very close space to each other. (Vertically or sometimes horizontally)
2) basically we can Select by using windows or crossing lines.
3) once we have the Selected lines.
4) we need to further select ONLY the alternate pattern. from step 3.
- this is the part we need for some solution to speed up the alternate line selection, instead to select 1 at a time.
for the purpose of changing color, layers, isolate, and others.
hope the above is clear.
Regards and thank you,
Kenneth
It really makes more sense for the selection to be done by Fence, rather than by Window/Crossing/Lasso, because the order of the objects in the selection set will be the order in which the Fence line crosses them. That makes it infinitely easier to remove every other one from the selection, as compared to a Window/Crossing selection, which gives a selection set in drawn [or maybe reversed drawn] order, and that could be all jumbled, so a lot of calculation is required to figure out the order they're in. Fence selection also means it doesn't matter whether the selected objects are horizontal or vertical or at any other angle, whereas with a WindowCrossing selection, some figuring of direction would need to be part of the figuring of the sequence for every-other determination.
Whether that selection is before or after starting the command -- either could be done, but if it's inside the command, the User could be prompted to select by Fence, or with two points that the routine will use for a Fence.
Another question occurs to me: The first images have an odd number of objects in the bigger selection, so both end objects end up selected. But the images in Message 5 show an even number of objects in the bigger selection, and in the culled selection one of the original end objects [at left] is selected, and the other end object [at right] is left out. Is there some criterion for which end object should be "first" and selected, from which the every-other sequence should begin?
Good day, & very much appreciate your LISP of the above.
i have an additional requirement.
1) Sometimes we need to use "Qselect", to filter the lines we need to be selected in alternate.
2) how to use your LISP, for example, we already have "Selected lines", then further select an alternate.
currently, I tried preselected lines, then using your LISP it will NOT select the line although some message on the command line.
Very much appreciate your help. and BTW, do you have references to share for the LISP coding? i am very interested to learn.
Thank you in advance,
Kenneth
@pankaj wrote:
Hello komondormrex,
.... the same requirement lisp but with lines with different angles. ....
If they all aimed at the same center so that they could be ordered by their varying angles, or if they were positioned in drawn order, I could imagine some approaches. But they don't -- many are parallel, and the drawn order is random.
Are you willing to be required to select them using Fence mode only? Then the order in the selection would be the order in which the Fence crosses them, and it wouldn't be difficult to do what you need. EDIT:
(defun C:SEO (/ n ss); = Select Every Other
(setq
sseo (ssadd); initially empty
n -1
); setq
(prompt "\nUsing Fence selection only,")
(if (setq ss (ssget)); add entity type or Layer or... filter(s) as desired
(while (< (setq n (+ n 2)) (sslength ss))
(ssadd (ssname ss n) sseo)
); while
); if
(sssetfirst nil sseo); select/grip/highlight
)
That leaves them in the sseo variable to do with what you will, if just using the Properties palette with them as selected isn't what you need. It could be made to do something else directly with each rather than put them into another selection set.
As written, it picks the second, fourth, etc., but could be made to pick the first, third, etc., by changing the initial n variable to -2. Or it could ask whether you want the odds or the evens. It could even be made to ask for the interval -- select every third one? every seventh one?
Or, do they always have Multileader numbered identifiers pointing to them as in your drawing [i.e. those are not just for illustration]?
Hi sir and ALL,
Firstly, I very much appreciate the "alternate Lisp".
currently, I /we need to create arrows or multi-leader arrows. Currently, we created it as 1 by 1. Pick the lines 😀
1) Like, once I after select the "alternate lines" it will add an arrow or multi-leader arrows.
similar to the below image.
Or, I may put the 1st multi-leader arrow, then "add leader" to other selected lines.
Again very much appreciate the big help.
Thank you,
Kenneth
Hi good day,
thank you for the replay.
1) the arrows are used for labeling that particular line/rebar and can be any location.
or, can it be put anywhere, and later on I/we will adjust the location
2) once we have the arrows - we will provide labels/ information near/ above the arrows.
this is to know what label we will put in the paper space later on.
3) the starting of the arrows is for the final label at the paper space. - this is at later part.
as below image.
Thank you very much for the support,
Kenn
