Reference Channel in Variable

[7ofDiamonds]

I'm trying to link a channel to a variable. I've tried copying the absolute path (with and without "ch") but to no avail. How can I do this?

 

See the diagram attached.

 

 

[ayidi]

The variables pane is meant for environment variables and settings (strings).

 

The easiest way to reference a parameter is by doing right click and copy parameter. Then paste the parameter using the right click menu at the location you want to reference it.

 

This video should be helpful:

[7ofDiamonds]

I watched the video but it didn't answer my question.

 

Is it possible to create a Variable that can be controlled by a slider?

The variables pane is meant for environment variables and settings (strings).

 

The easiest way to reference a parameter is by doing right click and copy parameter. Then paste the parameter using the right click menu at the location you want to reference it.

 

This video should be helpful:

 

[Guest mantragora]

You got this opposite. Variables are propagated down the line, so they can feed what you have in Houdini. You don't feed them up from some data in Houdini. Think about them like a top most directory. If you modify it, everything below changes. If you change something below, top most directory doesn't care about it.

Actually, think about them like if they were Constants. You set them once.

 

What you want to do? 

[7ofDiamonds]

That cleared things up! Instead of using the variable, I just referenced the channel that I wanted to change to the slider. Thanks!

You got this opposite. Variables are propagated down the line, so they can feed what you have in Houdini. You don't feed them up from some data in Houdini. Think about them like a top most directory. If you modify it, everything below changes. If you change something below, top most directory doesn't care about it.

Actually, think about them like if they were Constants. You set them once.

 

What you want to do? 

[Atom]

@7ofDiamonds: Can you post example code on how to do this?

 

I just ran into a similar need. I want to use a python script to drive channels in other nodes. I assume this is possible but I can't figure out the syntax.

 

In it's simplest form here is what I am talking about.

ch("blend1") = 0.5

This does not work in python. But that is the intention of what I want my python code to do.

 

Does anyone have  any tips?

 

Thanks

[Atom]

After some research I discovered that what Houdini calls "channels", Python calls "parms" or parameters.

So the solution is to set a value for a parameter on a given node.

target_node = hou.node('/obj/simplemale1')
p = target_node.parm("blend1")
p.set(0.5)

Edited November 15, 2015 by Atom