Manually turn snaps on during command, automatically turn off after 1 use

[Anonymous]

Hello,

I used to use the following snap customisations at my previous job and I'd like to customise my AutoCAD at my new job:

1. All snaps are off by default
2. During a command for either 2D or 3D I can press either:
   'F3' - Quadrant, Perpendicular, Tangent snaps
   'F4' - Endpoint, Midpoint, Center, Intersection snaps
   'F5' - Nearest snap
3. Once I have used the snap by clicking my mouse, snaps are automatically turned off again. If I am in the middle of a command, e.g. 'polyline', I will have to click F4 after each mouse button press to activate the snaps again.

Do I need to create lisps for my 'F3', 'F4' & 'F5' keys? Or can this be done within AutoCAD (which I've tried but failed).

Cheers,

Hamish

[Moshe-A]

@Anonymous  hi,

Yes you can do this with CUI command (no lisp is needed but you need to explore cui more)

in CUI dialog on the upper left pane go to Keyboard Shortcuts \  Shortcut Keys

moshe

[hencoop]

If your command is invoked by autolisp then just insert the desired snap override into your command sequence.  It will remain active for the next selection only but if the command is repeated the overrides will be used again at that point in your sequence. 

e.g.

(WHILE ...
  ...
  (COMMAND "LINE" "qua,per,tan" ...)
  ...
)

 Also, you can preset the OSMODE in your code prior to any point input.  e.g.

(DEFUN C:XYZ ()
  (SETQ preXYZ_osmode (GETVAR "OSMODE"))
  (SETVAR "OSMODE" 1285); set the different osmodes via the dialog and then run (GETVAR "OSMODE") to see the integer for that setting... or look it up in OSMODE help.
  <... function ...>
  (SETVAR "OSMODE" preXYZ_osmode)
  (PRINC)
)

You can also switch your OSMODE between the original and temporary settings you need as many times as necessary and for as many different settings as required within your code.