Swap A and B parameters

[A_ Smith]

Tbh I feel silly to ask such basic question, but I can't figure out how to swap values for A, B.

If additional parametes are created it's easy to change their values based on constant A, B. Though how to do it when with help of 2 parameters only? preferably main A, B.

https://drive.google.com/file/d/1TuKbeIqsUdWjve0QYYlYH62h2HNA5-T7/view?usp=drivesdk

[Joachim Suehlo]

If I change the script to the following, it works for me (AC 22 and 26 on macOS)

!PARAMETER SCRIPT
!Create values for bSwap (boolean) and A1 & B1 (real) in the parameters 

	A1 = A
	B1 = B

	PARAMETERS A1 = A1, B1 = B1

	IF GLOB_MODPAR_NAME = "bSwap" THEN 
	
		IF bSwap = 1 THEN
			A = B1
			B = A1
			ZZYZX = A1
		ELSE
			A = A1
			B = B1
			ZZYZX = B1
		ENDIF
		
		PARAMETERS A = A, B = B, ZZYZX = ZZYZX, bSwap = 0
	
	ENDIF

[DGSketcher]

Logic failure on my part. 🙄 Without setting bSwap back to Zero the swap would be constantly valid and would try to change A & B every time the Parameter script was run.

So @A_ Smith a working solution...

!PARAMETER SCRIPT
!Create values for bSwap (boolean) and A1 & B1 (real) in the parameters 


	IF GLOB_MODPAR_NAME = "bSwap" THEN 
	
		A1 = A
		B1 = B
		PARAMETERS A1 = A1, B1 = B1

		IF bSwap = 1 THEN
			A = B1
			B = A1
		ENDIF
		
		bSwap = 0

		PARAMETERS A = A, B = B, bSwap = bSwap
	
	ENDIF

OR use @Joachim Suehlo earlier solution which I missed due to this stupid forum formatting.

[A_ Smith]

Indeed. Thanks.

Though, my brain still can't except that this works only due to overriding bSwap - "parameters bSwap=0". Without it should work too, right? just instead I would have to 'unckeck' bSwap and then make it true again (but that doesn't work).

[Lingwisyer]

If you wanted to, you could double the script within the ModPar with IF bSwap = 1 then Else endIF. By doing this it should just keep swapping each time you check it.