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

[DGSketcher]

@A_ Smith You need to clarify a bit more about where you are changing the values e.g. param-o or in a GDL script? In gdl you will need to create swap values e.g. a1 & b1 if you don’t want to loose the originals. You could also do a similar thing with Find & Replace.

[A_ Smith]

GDL.

In parameter script I planned to swap A, B - at least for now (when "bSwap" is true), without saving original values. Kinda temp=A, A=B, B=temp

Originally I wanted to swap values each! time "bSwap" is changed... Just in order to find out why that doesn't work, decided to make it simpler.

[Lingwisyer]

I would:

IF GLOB_MODPAR_NAME = bSwap then
temp = A
A = B
B = temp
PARAMETERS A = A
PARAMETERS B = B
PARAMETERS bSwap = 0
endIF

Ling.

[A_ Smith]

Right, but that doesn't work...

[DGSketcher]

Try Ling's Parameter Script extract without the 'Parameters bSwap = 0' you will then know if the values are swapped.

[A_ Smith]

Well, I know it without deleting that row - it doesn't work as expected. I see that values don't change. Just to be sure, I removed it - all remais the same.

Unfortunatelly trying to help without actually checking it, doesn't do the job. Because, it's so simle lines of code (strange to say it though) that can't be wrong. Nevertheless they do not obey.

[DGSketcher]

One for Grand Master @Peter Baksa I think. There appears to be some value protections in place for A, B & ZZYZX which don't apply to other parameters. 

In the following, the values of A1 & B1 swap but the values of A, B & ZZYZX remain static...

!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
	
	ENDIF

[Lingwisyer]

Odd... since I have replaced the A, B and ZZYZX values in objects before...

[Joachim Suehlo · Accepted solution]

If I change the script to following it works for me:

temp_A = A
temp_B = B

IF GLOB_MODPAR_NAME = "bSwap" then
	IF bswap = 1 THEN
		A = temp_B
		B = temp_A
		PARAMETERS A = A
		PARAMETERS B = B
		PARAMETERS bSwap = 0
	ENDIF
endIF