AME 394 Local Variable — Note in TouchDesigner

refer : https://matthewragan.com/2015/03/29/ame-394-local-variables-touchdesigner/

Key Points :

1. Local Variable
2. Local Variable with CHOP

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Local Variable

.setVar(‘variable_name’, value)

Create a “Text” (DAT operator), and writing down the codes.

me.parent().setVar(‘Height’, 720)
me.parent().setVar(‘Width’, 1280)

Then, right click on the “Text” node, choosing ‘Run Script’.

It’ll automatically generate a “local” operator.

Now we have the local variables.

Let’s go to parent level. We can use it like this.

me.var(‘Height’)
me.var(‘Width’)

Local Variable with CHOP

We used “LFO” (CHOP operator) in the example.

1. Create “LFO” and linking it to “CHOP Execute” (DAT operator).
2. Keep ‘onValueChange()’ only in the “CHOP Execute”, and checking the ‘Value Change’ is switching on.
3. I used the ‘round()’ function to make the value more easy the look.

def onValueChange(channel, sampleIndex, val, prev):
    me.parent().setVar('LFO', round(val, 2))
    return

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This article is note about learning AME 394 by Matthew Ragan.

It’s the best TouchDesigner teacher I’ve seen.

References:

AME 394 | Local Variables | TouchDesigner