Hi there.

I was asking my self, is it possible to bypass SOP Nodes with
an expression? Or create a similiar “activate” parameter as it exists
in some POP Nodes (0 == Off, 1 == On).

'd be great if someone could help me along,

all the best,

Manuel

Yes, you can branch from the SOP before to a null, then plug both the null and the now by-passable SOP into a switch SOP. Using the switch SOP slider you can now toggle a bypass of the SOP (by making it switch to the null instead).

cheers,
Abdelkareem

very neat solution, should have thought of it myself

cheers from Munich, very nice to see some other active German users!

Manuel

You can use something like this “opset -b on opobj/geo1/polyextrude1” but I failed (It's 3 AM where i live so this maybe the case .) to make this work in script menu, works only in textport. Maybe somebody knows a way to join this with if expresion or something similar.

same here, it's the middle of the night, you're not that far away i guess ^^
can't even find “opset” in the exhelp ?!

opset is an hscript command, not an expression function.

To view its help you need to just do “help opset”.

To run an hscript command in the expression context you need to wrap it in an execute() expression function.

execute(“opset -b on /obj/geo1/file1”)

Depending on what you are doing, the switch method is usually better because if you wanted to do something like this inside an asset you wouldn't be able to because you can't change the flag on a node inside when it is locked.

ah ok.

actually i wanted to do something like this:

if(ch(“./onoff”) == 1, execute(“opset -b on opobj/box_object1/visibility1”), don't bypass the SOP node)

but as you mentioned once the bypass is set, it can't be undone.
So guess i have to stick with the Null solution, although i love to keep my amount of nodes as low as possible -.-

Both the Null and Switch SOPs will attempt to just reference (as opposed to copying) the geometry if possible. So most of time, those nodes incur minimal overhead.

ok. different approach.
Say i have plugged my geometry into a visibility SOP.
Further i have a Null SOP which has all the controls of my scene in it.
Can i access the visibility SOP's “action” parameters (hide and expose) via expressions and control them maybe with an on/off toggle ?

Just make switch(or if you prefer menu) on you asset ,copy paramater and paste it as reference into action slot of visibilitySOP.

isn't that easy!
the visibility SOP has no slot, it has a drop down Menu instead of a field where you can type in stuff.

maybe the chs() expression can help somehow?

asnowcappedromance
isn't that easy!
the visibility SOP has no slot, it has a drop down Menu instead of a field where you can type in stuff.\

Actually it's that easy

It just does't matter. Still zero means first option in menu and one means second option in menu.

In attached otl I just made RMB+copyParameter and then pasted it into action slot/menu of visibilitySOP.

haha you're right,
it IS that easy ))

thanks a lot )

asnowcappedromance
, it has a drop down Menu instead of a field where you can type in stuff.

RMB on function name and choose “Expression/Edit Expresion” And there you have your slot

very slick,
that was exactly what i was looking for,
thank you

regards,

Manuel