Divide line / creating snap points
@Anonymous Please upload a true real dwg when you use
this values
And the way you do it , if by "hand" or some LISP.
Accepted solution
I think you should be able to use the DIV+ command in DivideMeasurePlus.lsp, available >here<. It is a super-charged Divide command, with many enhancements over what regular DIVIDE can do. The ones you will be interested in are:
1) It has the option of a Maximum spacing between the [in your case] Block insertions. You would use twice the sprinkler-coverage radius. It will calculate how many are needed to cover the length in the fewest insertions such that the spacing does not exceed that Maximum.
2) EDITED after re-reading notes in spreadsheet: It has the option to place insertions at the ends of the path object, which would be your 90-degree head locations.
You need a path object covering the full extent in one piece [anything with linearity -- Line, Arc, Polyline, Circle, Spline, Ellipse]. Given that, all you need is to select it and use twice that radius as described -- it will figure out all the rest for you, without the need for the spreadsheet.
If you use a different Block at the ends of the range, you can use the through-the-middle Block in DIV+, without the put-them-at-the-ends option, and use the end-type Blocks in another DIV+ command, calling for 1 segment [another thing regular DIVIDE can't do] instead of the Maximum option, with the at-the-ends option.
Kent Cooper, AIA 
@Anonymous wrote:
....
Is it correct that using div+ changes my snap settings (it turns all of them of and even removed my selection) or am I doing something wrong?
....
It was written before the (command-s) function existed, and before [at Acad2016, I think?] the use of the "plain" (command) function in *error* handlers was frowned upon. I'm guessing that you are ending it with ESCape, and you're getting an error message -- you should do just what it suggests:
Change this line [near the top, in the (dmerror) function definition]:
(command "_.undo" "_end")
to this:
(command-s "_.undo" "_end")
and likewise change [a few lines above, but less likely to be the source of the problem because less likely to be the situation]:
(if ucschanged (command "_.ucs" "_prev"))
to:
(if ucschanged (command-s "_.ucs" "_prev"))
Even without making that change, it should still work as expected if you end it with Enter or space, rather than ESCape, because then the *error* handler will not be called for.
Kent Cooper, AIA
@Anonymous wrote:
... I'm wondering if it could be written a little bit easier, with less prompts that should be giving in:
- Divide with points / blocks / lines / selections: I always use points
- Layer for the points: I always use current
- Enter number of segments or maximum spacing: Always maximum spacing
- Maximum spacing of points: different
- place points at division points (standard) or at midpoints of division : always at division points (standard).
-insert from both ends of path to endmost points: always zero
- place points at end of unclosed path: always yes
Could/would you rewrite or delete the other questions to simplify it a little bit?
I simplifies [and shortens] it quite a lot, actually. Try the attached DivideMaxPoints.lsp with its DMP command. Lightly tested [I didn't try every possible entity type in different UCS, etc.].
One change beyond the simplification is that this one allows you to select as many things as you want thus divided, all at once, rather than one at a time. [The other did one at a time, so it could check for validity of each object in relation to the various options, and ask again if something was inappropriate. But this merely filters for appropriate entity types, and because of the elimination of certain options, it can always proceed with anything that qualifies under the selection filtering.]
Kent Cooper, AIA
Hi Kent,
This is great and does the job 🙂
Just one more (stupid?) question
when I zoom in and out the points change size. Unfortunately they do not automatically change back. See image below. Do I have a setting wrong somewhere in autocad? Is it possible that they always remain the same size? (the original insert size as in the first image).
