Boolean switch ?

What's the elegant way of saying :

If "whatever" =True, then execute this part of the definition, but if it's =False, then execute this other part ?

I seem to be stuck with manual switching...

Cheers,

Olivier

Replies to This Discussion

Permalink Reply by Chris Tietjen on April 3, 2011 at 10:29am

Chris

Permalink Reply by Olivier Suire on April 3, 2011 at 10:54am

Hi Chris,

This is not what I mean.

I'm interested in what happens AFTER a "True" or "False" boolean has been evaluated.

To take your example, if x=1 (true), then I want to do a bunch of stuff, else I want to do a DIFFERENT bunch of stuff.

See ?

Olivier

Permalink Reply by Andrew Heumann on April 3, 2011 at 11:51am

One way is to use the Dispatch component with a single boolean value to activate different process streams. See the attached file for an example.

Attachments:

boolean_switching_streams.ghx, 204 KB

Permalink Reply by Olivier Suire on April 3, 2011 at 1:20pm

Exactly what I needed !

Thanks Andrew !

Olivier

Permalink Reply by Danny Boyes on April 3, 2011 at 2:08pm

another method is the stream filter gate on the sets section > tree tab. supply a 0 and only the input 0 goes through supply a 1 and only stream 1. there is alsp an input manager so you can add any number of inputs 0,1,2,3,....N

Permalink Reply by Olivier Suire on April 3, 2011 at 2:19pm

Thanks guys,

But what if I just want to trigger events without passing data to them.

Example : If n>10 then "draw a square", else "Draw a circle". With the "n" value having no influence whatsoever on the size or location of the said circle and square ?

I just need to trigger something ; not necessarily pass along some data...

Cheers,

Olivier

Permalink Reply by Danny Boyes on April 3, 2011 at 3:20pm

Hi Oliver,

This illustrates your example. When 'timeline' gets above 10 there will be a square instead of the circle.

In this case the 'data' to pass along is the geometry, and it doesn't actually have to go anywhere the filter is a preview enabled component.

Permalink Reply by Pieter Segeren on April 3, 2011 at 3:26pm

Hi Danny, can I ask what expression you used in the domain, because I used my UserObject...

Permalink Reply by Danny Boyes on April 3, 2011 at 3:32pm

That was just -A so the domain is -10 to 10. Normally I have a domain component with expressions of -A/2 and B/2 so that I get the rectangle centred on the plane.

Permalink Reply by Danny Boyes on April 3, 2011 at 3:30pm

Of course the flip side to that is the Stream Gate, but this is passing the data onto another process.