topic Re: IF THEN ELSE statement in Parameters? in Inventor Programming Forum

IF THEN ELSE statement in Parameters?

Anonymous — Mon, 01 Oct 2018 14:39:45 GMT

Is it possible to put an IF THEN ELSE statement into the Parameters equation field? If so, could someone point me in the direction of how to parse it correctly because I can't seem to get it to work.

Thank you.

Re: IF THEN ELSE statement in Parameters?

philip1009 — Mon, 01 Oct 2018 14:48:21 GMT

iLogic is your solution if you want to use Visual Basic code to regulate or automate Parameters. Head over to the Inventor Customization forum for more help with this kind of task. Other than that, let us know your workflow so we can help find the best solution for you, just make sure nothing you post or attach has anything confidential.

Re: IF THEN ELSE statement in Parameters?

SBix26 — Mon, 01 Oct 2018 15:00:05 GMT

Can't be done directly, but with some clever tricks with supported functions you can put this logic into parameters. Have a look at this posting from @ACEDeSmedt for some ideas. There may be other posts along these lines, but my quick searching didn't spot them.

Sam B
Inventor Pro 2019.1.2 | Windows 7 SP1
LinkedIn

Re: IF THEN ELSE statement in Parameters?

mcgyvr — Mon, 01 Oct 2018 18:02:15 GMT

@Anonymous wrote:

Is it possible to put an IF THEN ELSE statement into the Parameters equation field? If so, could someone point me in the direction of how to parse it correctly because I can't seem to get it to work.

Thank you.

Can you provide an example of what you are trying to do?

You can do "IF" statements for feature suppression based on parameters without using ilogic through the feature properties..

Re: IF THEN ELSE statement in Parameters?

Anonymous — Mon, 01 Oct 2018 18:51:16 GMT

In the "Parameters" dialogue, under the User Parameter "HOLE_COUNT", I want to basically do this:

if Y_DIM<10 then (floor(d0 / d18) + 1 ul) else floor(d0 / d18)

Sorry that it's taken me so long to respond today; it's certainly been a Monday here.

Re: IF THEN ELSE statement in Parameters?

philip1009 — Mon, 01 Oct 2018 19:04:15 GMT

On your Ribbon, go to Manage > iLogic > iLogic Browser, right click in the empty space of the browser and click Add Rule. Name this Rule whatever you want and click OK. Here's the code that would fit the scenario you provided:

SyntaxEditor Code Snippet

If Y_DIM < 10 Then
	HOLE_COUNT = Floor(d0 / d18) + 1
Else
	HOLE_COUNT = Floor(d0 / d18)
End If

Save and close the rule. Then back in your Manage > iLogic tab in your Ribbon, click on Event Triggers, in this window you can set a rule to automatically run when one of the triggers happens. In this case, set the rule to run on Any Model Parameter Change.

Re: IF THEN ELSE statement in Parameters?

Anonymous — Mon, 01 Oct 2018 19:48:21 GMT

Thank you, Philip. I will give this a go when I get back into the office in the morning. Greatly appreciated.

Re: IF THEN ELSE statement in Parameters?

ACEDeSmedt — Fri, 09 Nov 2018 14:59:00 GMT

For the following statement:

parameter = Y_DIM<10 then (floor(d0 / d18) + 1 ul) else floor(d0 / d18)

add this expression to the parameter:

parameter = floor(d0 / d18) + sign( 10 mm - Y_DIM )

You will need to specify the unit of '10' to match the unit of Y_DIM

sign() will output a 1 ul for every positive number and a 0 ul for not positive numbers (including 0)